/* variables.c -- Functions for hacking shell variables. */
-/* Copyright (C) 1987,1989 Free Software Foundation, Inc.
+/* Copyright (C) 1987-2016 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
- Bash is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bash is distributed in the hope that it will be useful, but WITHOUT
- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- License for more details.
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with Bash; see the file COPYING. If not, write to the Free
- Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
#include "config.h"
#include "bashtypes.h"
#include "posixstat.h"
+#include "posixtime.h"
-#if defined (qnx)
-# include <sys/vc.h>
-#endif
+#if defined (__QNX__)
+# if defined (__QNXNTO__)
+# include <sys/netmgr.h>
+# else
+# include <sys/vc.h>
+# endif /* !__QNXNTO__ */
+#endif /* __QNX__ */
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#include <stdio.h>
-#include <ctype.h>
-#include <pwd.h>
+#include "chartypes.h"
+#if defined (HAVE_PWD_H)
+# include <pwd.h>
+#endif
#include "bashansi.h"
+#include "bashintl.h"
+
+#define NEED_XTRACE_SET_DECL
#include "shell.h"
#include "flags.h"
#include "findcmd.h"
#include "mailcheck.h"
#include "input.h"
+#include "hashcmd.h"
+#include "pathexp.h"
+#include "alias.h"
+#include "jobs.h"
+
+#include "version.h"
#include "builtins/getopt.h"
#include "builtins/common.h"
+#include "builtins/builtext.h"
#if defined (READLINE)
# include "bashline.h"
# include <readline/history.h>
#endif /* HISTORY */
+#if defined (PROGRAMMABLE_COMPLETION)
+# include "pcomplete.h"
+#endif
+
+#define VARIABLES_HASH_BUCKETS 1024 /* must be power of two */
+#define FUNCTIONS_HASH_BUCKETS 512
+#define TEMPENV_HASH_BUCKETS 4 /* must be power of two */
+
+#define BASHFUNC_PREFIX "BASH_FUNC_"
+#define BASHFUNC_PREFLEN 10 /* == strlen(BASHFUNC_PREFIX */
+#define BASHFUNC_SUFFIX "%%"
+#define BASHFUNC_SUFFLEN 2 /* == strlen(BASHFUNC_SUFFIX) */
+
+/* flags for find_variable_internal */
+
+#define FV_FORCETEMPENV 0x01
+#define FV_SKIPINVISIBLE 0x02
+
+extern char **environ;
+
/* Variables used here and defined in other files. */
extern int posixly_correct;
-extern int variable_context, line_number;
-extern int interactive, interactive_shell, login_shell;
-extern int subshell_environment, indirection_level;
+extern int line_number, line_number_base;
+extern int subshell_environment, indirection_level, subshell_level;
extern int build_version, patch_level;
+extern int expanding_redir;
+extern int last_command_exit_value;
extern char *dist_version, *release_status;
extern char *shell_name;
extern char *primary_prompt, *secondary_prompt;
extern char *current_host_name;
-extern Function *this_shell_builtin;
+extern sh_builtin_func_t *this_shell_builtin;
+extern SHELL_VAR *this_shell_function;
+extern char *the_printed_command_except_trap;
extern char *this_command_name;
+extern char *command_execution_string;
extern time_t shell_start_time;
+extern int assigning_in_environment;
+extern int executing_builtin;
+extern int funcnest_max;
-/* The list of shell variables that the user has created, or that came from
- the environment. */
-HASH_TABLE *shell_variables = (HASH_TABLE *)NULL;
+#if defined (READLINE)
+extern int no_line_editing;
+extern int perform_hostname_completion;
+#endif
+
+/* The list of shell variables that the user has created at the global
+ scope, or that came from the environment. */
+VAR_CONTEXT *global_variables = (VAR_CONTEXT *)NULL;
+
+/* The current list of shell variables, including function scopes */
+VAR_CONTEXT *shell_variables = (VAR_CONTEXT *)NULL;
/* The list of shell functions that the user has created, or that came from
the environment. */
HASH_TABLE *shell_functions = (HASH_TABLE *)NULL;
+#if defined (DEBUGGER)
+/* The table of shell function definitions that the user defined or that
+ came from the environment. */
+HASH_TABLE *shell_function_defs = (HASH_TABLE *)NULL;
+#endif
+
/* The current variable context. This is really a count of how deep into
executing functions we are. */
int variable_context = 0;
-/* The array of shell assignments which are made only in the environment
+/* The set of shell assignments which are made only in the environment
for a single command. */
-char **temporary_env = (char **)NULL;
+HASH_TABLE *temporary_env = (HASH_TABLE *)NULL;
-/* The array of shell assignments which are in the environment for the
- execution of a shell function. */
-char **function_env = (char **)NULL;
-
-/* The array of shell assignments which are made only in the environment
- for the execution of a shell builtin command which may cause more than
- one command to be executed (e.g., "source"). */
-char **builtin_env = (char **)NULL;
+/* Set to non-zero if an assignment error occurs while putting variables
+ into the temporary environment. */
+int tempenv_assign_error;
/* Some funky variables which are known about specially. Here is where
"$*", "$1", and all the cruft is kept. */
WORD_LIST *rest_of_args = (WORD_LIST *)NULL;
/* The value of $$. */
-int dollar_dollar_pid;
+pid_t dollar_dollar_pid;
+
+/* Non-zero means that we have to remake EXPORT_ENV. */
+int array_needs_making = 1;
+
+/* The number of times BASH has been executed. This is set
+ by initialize_variables (). */
+int shell_level = 0;
/* An array which is passed to commands as their environment. It is
manufactured from the union of the initial environment and the
static int export_env_index;
static int export_env_size;
-/* Non-zero means that we have to remake EXPORT_ENV. */
-int array_needs_making = 1;
+#if defined (READLINE)
+static int winsize_assignment; /* currently assigning to LINES or COLUMNS */
+#endif
-/* The number of times BASH has been executed. This is set
- by initialize_variables (). */
-int shell_level = 0;
+SHELL_VAR nameref_invalid_value;
+static SHELL_VAR nameref_maxloop_value;
-static char *have_local_variables;
-static int local_variable_stack_size;
+static HASH_TABLE *last_table_searched; /* hash_lookup sets this */
/* Some forward declarations. */
-static void set_home_var ();
-static void set_shell_var ();
-static char *get_bash_name ();
-static void initialize_shell_level ();
-static void uidset ();
-static void initialize_dynamic_variables ();
-static void make_vers_array ();
-static void sbrand (); /* set bash random number generator. */
-static int qsort_var_comp ();
-
-/* Make VAR be auto-exported. VAR is a pointer to a SHELL_VAR. */
-#define set_auto_export(var) \
- do { var->attributes |= att_exported; array_needs_making = 1; } while (0)
+static void create_variable_tables __P((void));
+
+static void set_machine_vars __P((void));
+static void set_home_var __P((void));
+static void set_shell_var __P((void));
+static char *get_bash_name __P((void));
+static void initialize_shell_level __P((void));
+static void uidset __P((void));
+#if defined (ARRAY_VARS)
+static void make_vers_array __P((void));
+#endif
+
+static SHELL_VAR *null_assign __P((SHELL_VAR *, char *, arrayind_t, char *));
+#if defined (ARRAY_VARS)
+static SHELL_VAR *null_array_assign __P((SHELL_VAR *, char *, arrayind_t, char *));
+#endif
+static SHELL_VAR *get_self __P((SHELL_VAR *));
+
+#if defined (ARRAY_VARS)
+static SHELL_VAR *init_dynamic_array_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int));
+static SHELL_VAR *init_dynamic_assoc_var __P((char *, sh_var_value_func_t *, sh_var_assign_func_t *, int));
+#endif
+
+static SHELL_VAR *assign_seconds __P((SHELL_VAR *, char *, arrayind_t, char *));
+static SHELL_VAR *get_seconds __P((SHELL_VAR *));
+static SHELL_VAR *init_seconds_var __P((void));
+
+static int brand __P((void));
+static void sbrand __P((unsigned long)); /* set bash random number generator. */
+static void seedrand __P((void)); /* seed generator randomly */
+static SHELL_VAR *assign_random __P((SHELL_VAR *, char *, arrayind_t, char *));
+static SHELL_VAR *get_random __P((SHELL_VAR *));
+
+static SHELL_VAR *assign_lineno __P((SHELL_VAR *, char *, arrayind_t, char *));
+static SHELL_VAR *get_lineno __P((SHELL_VAR *));
+
+static SHELL_VAR *assign_subshell __P((SHELL_VAR *, char *, arrayind_t, char *));
+static SHELL_VAR *get_subshell __P((SHELL_VAR *));
+
+static SHELL_VAR *get_bashpid __P((SHELL_VAR *));
+
+#if defined (HISTORY)
+static SHELL_VAR *get_histcmd __P((SHELL_VAR *));
+#endif
+
+#if defined (READLINE)
+static SHELL_VAR *get_comp_wordbreaks __P((SHELL_VAR *));
+static SHELL_VAR *assign_comp_wordbreaks __P((SHELL_VAR *, char *, arrayind_t, char *));
+#endif
+
+#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
+static SHELL_VAR *assign_dirstack __P((SHELL_VAR *, char *, arrayind_t, char *));
+static SHELL_VAR *get_dirstack __P((SHELL_VAR *));
+#endif
+
+#if defined (ARRAY_VARS)
+static SHELL_VAR *get_groupset __P((SHELL_VAR *));
+
+static SHELL_VAR *build_hashcmd __P((SHELL_VAR *));
+static SHELL_VAR *get_hashcmd __P((SHELL_VAR *));
+static SHELL_VAR *assign_hashcmd __P((SHELL_VAR *, char *, arrayind_t, char *));
+# if defined (ALIAS)
+static SHELL_VAR *build_aliasvar __P((SHELL_VAR *));
+static SHELL_VAR *get_aliasvar __P((SHELL_VAR *));
+static SHELL_VAR *assign_aliasvar __P((SHELL_VAR *, char *, arrayind_t, char *));
+# endif
+#endif
+
+static SHELL_VAR *get_funcname __P((SHELL_VAR *));
+static SHELL_VAR *init_funcname_var __P((void));
+
+static void initialize_dynamic_variables __P((void));
+
+static SHELL_VAR *hash_lookup __P((const char *, HASH_TABLE *));
+static SHELL_VAR *new_shell_variable __P((const char *));
+static SHELL_VAR *make_new_variable __P((const char *, HASH_TABLE *));
+static SHELL_VAR *bind_variable_internal __P((const char *, char *, HASH_TABLE *, int, int));
+
+static void dispose_variable_value __P((SHELL_VAR *));
+static void free_variable_hash_data __P((PTR_T));
+
+static VARLIST *vlist_alloc __P((int));
+static VARLIST *vlist_realloc __P((VARLIST *, int));
+static void vlist_add __P((VARLIST *, SHELL_VAR *, int));
+
+static void flatten __P((HASH_TABLE *, sh_var_map_func_t *, VARLIST *, int));
+
+static int qsort_var_comp __P((SHELL_VAR **, SHELL_VAR **));
+
+static SHELL_VAR **vapply __P((sh_var_map_func_t *));
+static SHELL_VAR **fapply __P((sh_var_map_func_t *));
+
+static int visible_var __P((SHELL_VAR *));
+static int visible_and_exported __P((SHELL_VAR *));
+static int export_environment_candidate __P((SHELL_VAR *));
+static int local_and_exported __P((SHELL_VAR *));
+static int variable_in_context __P((SHELL_VAR *));
+#if defined (ARRAY_VARS)
+static int visible_array_vars __P((SHELL_VAR *));
+#endif
+
+static SHELL_VAR *find_variable_internal __P((const char *, int));
+
+static SHELL_VAR *find_nameref_at_context __P((SHELL_VAR *, VAR_CONTEXT *));
+static SHELL_VAR *find_variable_nameref_context __P((SHELL_VAR *, VAR_CONTEXT *, VAR_CONTEXT **));
+static SHELL_VAR *find_variable_last_nameref_context __P((SHELL_VAR *, VAR_CONTEXT *, VAR_CONTEXT **));
+
+static SHELL_VAR *bind_tempenv_variable __P((const char *, char *));
+static void push_temp_var __P((PTR_T));
+static void propagate_temp_var __P((PTR_T));
+static void dispose_temporary_env __P((sh_free_func_t *));
+
+static inline char *mk_env_string __P((const char *, const char *, int));
+static char **make_env_array_from_var_list __P((SHELL_VAR **));
+static char **make_var_export_array __P((VAR_CONTEXT *));
+static char **make_func_export_array __P((void));
+static void add_temp_array_to_env __P((char **, int, int));
+
+static int n_shell_variables __P((void));
+static int set_context __P((SHELL_VAR *));
+
+static void push_func_var __P((PTR_T));
+static void push_exported_var __P((PTR_T));
+
+static inline int find_special_var __P((const char *));
+
+static void
+create_variable_tables ()
+{
+ if (shell_variables == 0)
+ {
+ shell_variables = global_variables = new_var_context ((char *)NULL, 0);
+ shell_variables->scope = 0;
+ shell_variables->table = hash_create (VARIABLES_HASH_BUCKETS);
+ }
+
+ if (shell_functions == 0)
+ shell_functions = hash_create (FUNCTIONS_HASH_BUCKETS);
+
+#if defined (DEBUGGER)
+ if (shell_function_defs == 0)
+ shell_function_defs = hash_create (FUNCTIONS_HASH_BUCKETS);
+#endif
+}
/* Initialize the shell variables from the current environment.
If PRIVMODE is nonzero, don't import functions from ENV or
int privmode;
{
char *name, *string, *temp_string;
- int c, char_index, string_index, string_length;
+ int c, char_index, string_index, string_length, ro;
SHELL_VAR *temp_var;
- if (shell_variables == 0)
- shell_variables = make_hash_table (0);
-
- if (shell_functions == 0)
- shell_functions = make_hash_table (0);
+ create_variable_tables ();
- for (string_index = 0; string = env[string_index++]; )
+ for (string_index = 0; env && (string = env[string_index++]); )
{
char_index = 0;
name = string;
while ((c = *string++) && c != '=')
;
if (string[-1] == '=')
- char_index = string - name - 1;
+ char_index = string - name - 1;
/* If there are weird things in the environment, like `=xxx' or a
string without an `=', just skip them. */
if (char_index == 0)
- continue;
+ continue;
/* ASSERT(name[char_index] == '=') */
name[char_index] = '\0';
/* Now, name = env variable name, string = env variable value, and
- char_index == strlen (name) */
+ char_index == strlen (name) */
- /* If exported function, define it now. */
- if (privmode == 0 && STREQN ("() {", string, 4))
+ temp_var = (SHELL_VAR *)NULL;
+
+#if defined (FUNCTION_IMPORT)
+ /* If exported function, define it now. Don't import functions from
+ the environment in privileged mode. */
+ if (privmode == 0 && read_but_dont_execute == 0 &&
+ STREQN (BASHFUNC_PREFIX, name, BASHFUNC_PREFLEN) &&
+ STREQ (BASHFUNC_SUFFIX, name + char_index - BASHFUNC_SUFFLEN) &&
+ STREQN ("() {", string, 4))
{
+ size_t namelen;
+ char *tname; /* desired imported function name */
+
+ namelen = char_index - BASHFUNC_PREFLEN - BASHFUNC_SUFFLEN;
+
+ tname = name + BASHFUNC_PREFLEN; /* start of func name */
+ tname[namelen] = '\0'; /* now tname == func name */
+
string_length = strlen (string);
- temp_string = xmalloc (3 + string_length + char_index);
-#if 1
- strcpy (temp_string, name);
- temp_string[char_index] = ' ';
- strcpy (temp_string + char_index + 1, string);
-#else
- sprintf (temp_string, "%s %s", name, string);
-#endif
+ temp_string = (char *)xmalloc (namelen + string_length + 2);
- parse_and_execute (temp_string, name, SEVAL_NONINT|SEVAL_NOHIST);
+ memcpy (temp_string, tname, namelen);
+ temp_string[namelen] = ' ';
+ memcpy (temp_string + namelen + 1, string, string_length + 1);
- /* Ancient backwards compatibility. Old versions of bash exported
- functions like name()=() {...} */
- if (name[char_index - 1] == ')' && name[char_index - 2] == '(')
- name[char_index - 2] = '\0';
+ /* Don't import function names that are invalid identifiers from the
+ environment in posix mode, though we still allow them to be defined as
+ shell variables. */
+ if (absolute_program (tname) == 0 && (posixly_correct == 0 || legal_identifier (tname)))
+ parse_and_execute (temp_string, tname, SEVAL_NONINT|SEVAL_NOHIST|SEVAL_FUNCDEF|SEVAL_ONECMD);
+ else
+ free (temp_string); /* parse_and_execute does this */
- if (temp_var = find_function (name))
+ if (temp_var = find_function (tname))
{
- temp_var->attributes |= (att_exported | att_imported);
+ VSETATTR (temp_var, (att_exported|att_imported));
array_needs_making = 1;
}
else
- report_error ("error importing function definition for `%s'", name);
+ {
+ if (temp_var = bind_variable (name, string, 0))
+ {
+ VSETATTR (temp_var, (att_exported | att_imported | att_invisible));
+ array_needs_making = 1;
+ }
+ last_command_exit_value = 1;
+ report_error (_("error importing function definition for `%s'"), tname);
+ }
- if (name[char_index - 1] == ')' && name[char_index - 2] == '\0')
- name[char_index - 2] = '(';
+ /* Restore original suffix */
+ tname[namelen] = BASHFUNC_SUFFIX[0];
}
+ else
+#endif /* FUNCTION_IMPORT */
#if defined (ARRAY_VARS)
-# if 0
+# if ARRAY_EXPORT
/* Array variables may not yet be exported. */
- else if (*string == '(' && string[1] == '[' && strchr (string, ')'))
+ if (*string == '(' && string[1] == '[' && string[strlen (string) - 1] == ')')
{
string_length = 1;
temp_string = extract_array_assignment_list (string, &string_length);
- temp_var = assign_array_from_string (name, temp_string);
+ temp_var = assign_array_from_string (name, temp_string, 0);
FREE (temp_string);
- temp_var->attributes |= (att_exported | att_imported);
+ VSETATTR (temp_var, (att_exported | att_imported));
array_needs_making = 1;
}
-# endif
-#endif
else
+# endif /* ARRAY_EXPORT */
+#endif
{
- temp_var = bind_variable (name, string);
- temp_var->attributes |= (att_exported | att_imported);
- array_needs_making = 1;
+ ro = 0;
+ if (posixly_correct && STREQ (name, "SHELLOPTS"))
+ {
+ temp_var = find_variable ("SHELLOPTS");
+ ro = temp_var && readonly_p (temp_var);
+ if (temp_var)
+ VUNSETATTR (temp_var, att_readonly);
+ }
+ temp_var = bind_variable (name, string, 0);
+ if (temp_var)
+ {
+ if (legal_identifier (name))
+ VSETATTR (temp_var, (att_exported | att_imported));
+ else
+ VSETATTR (temp_var, (att_exported | att_imported | att_invisible));
+ if (ro)
+ VSETATTR (temp_var, att_readonly);
+ array_needs_making = 1;
+ }
}
name[char_index] = '=';
- }
-
- /* If we got PWD from the environment, update our idea of the current
- working directory. In any case, make sure that PWD exists before
- checking it. It is possible for getcwd () to fail on shell startup,
- and in that case, PWD would be undefined. */
- temp_var = find_variable ("PWD");
- if (temp_var && imported_p (temp_var) &&
- (temp_string = value_cell (temp_var)) &&
- same_file (temp_string, ".", (struct stat *)NULL, (struct stat *)NULL))
- set_working_directory (temp_string);
- else
- {
- temp_string = get_working_directory ("shell-init");
- if (temp_string)
+ /* temp_var can be NULL if it was an exported function with a syntax
+ error (a different bug, but it still shouldn't dump core). */
+ if (temp_var && function_p (temp_var) == 0) /* XXX not yet */
{
- temp_var = bind_variable ("PWD", temp_string);
- set_auto_export (temp_var);
- free (temp_string);
+ CACHE_IMPORTSTR (temp_var, name);
}
}
+ set_pwd ();
+
/* Set up initial value of $_ */
- temp_var = bind_variable ("_", dollar_vars[0]);
+ temp_var = set_if_not ("_", dollar_vars[0]);
/* Remember this pid. */
- dollar_dollar_pid = (int)getpid ();
+ dollar_dollar_pid = getpid ();
/* Now make our own defaults in case the vars that we think are
important are missing. */
temp_var = set_if_not ("PATH", DEFAULT_PATH_VALUE);
- set_auto_export (temp_var);
+#if 0
+ set_auto_export (temp_var); /* XXX */
+#endif
temp_var = set_if_not ("TERM", "dumb");
- set_auto_export (temp_var);
+#if 0
+ set_auto_export (temp_var); /* XXX */
+#endif
-#if defined (qnx)
+#if defined (__QNX__)
/* set node id -- don't import it from the environment */
{
char node_name[22];
+# if defined (__QNXNTO__)
+ netmgr_ndtostr(ND2S_LOCAL_STR, ND_LOCAL_NODE, node_name, sizeof(node_name));
+# else
qnx_nidtostr (getnid (), node_name, sizeof (node_name));
- temp_var = bind_variable ("NODE", node_name);
- set_auto_export (temp_var);
+# endif
+ temp_var = bind_variable ("NODE", node_name, 0);
+ if (temp_var)
+ set_auto_export (temp_var);
}
#endif
/* set up the prompts. */
if (interactive_shell)
{
+#if defined (PROMPT_STRING_DECODE)
set_if_not ("PS1", primary_prompt);
+#else
+ if (current_user.uid == -1)
+ get_current_user_info ();
+ set_if_not ("PS1", current_user.euid == 0 ? "# " : primary_prompt);
+#endif
set_if_not ("PS2", secondary_prompt);
}
- set_if_not ("PS4", "+ ");
+
+ if (current_user.euid == 0)
+ bind_variable ("PS4", "+ ", 0);
+ else
+ set_if_not ("PS4", "+ ");
/* Don't allow IFS to be imported from the environment. */
- temp_var = bind_variable ("IFS", " \t\n");
+ temp_var = bind_variable ("IFS", " \t\n", 0);
+ setifs (temp_var);
/* Magic machine types. Pretty convenient. */
- temp_var = bind_variable ("HOSTTYPE", HOSTTYPE);
- set_auto_export (temp_var);
- temp_var = bind_variable ("OSTYPE", OSTYPE);
- set_auto_export (temp_var);
- temp_var = bind_variable ("MACHTYPE", MACHTYPE);
- set_auto_export (temp_var);
- temp_var = bind_variable ("HOSTNAME", current_host_name);
- set_auto_export (temp_var);
+ set_machine_vars ();
/* Default MAILCHECK for interactive shells. Defer the creation of a
default MAILPATH until the startup files are read, because MAIL
- names a mail file if MAILCHECK is not set, and we should provide a
+ names a mail file if MAILPATH is not set, and we should provide a
default only if neither is set. */
if (interactive_shell)
- set_if_not ("MAILCHECK", "60");
+ {
+ temp_var = set_if_not ("MAILCHECK", posixly_correct ? "600" : "60");
+ VSETATTR (temp_var, att_integer);
+ }
/* Do some things with shell level. */
initialize_shell_level ();
- /* Make a variable $PPID, which holds the pid of the shell's parent. */
- name = itos ((int) getppid ());
- temp_var = find_variable ("PPID");
- if (temp_var)
- temp_var->attributes &= ~(att_readonly | att_exported);
- temp_var = bind_variable ("PPID", name);
- temp_var->attributes |= (att_readonly | att_integer);
- free (name);
+ set_ppid ();
/* Initialize the `getopts' stuff. */
- bind_variable ("OPTIND", "1");
+ temp_var = bind_variable ("OPTIND", "1", 0);
+ VSETATTR (temp_var, att_integer);
getopts_reset (0);
- bind_variable ("OPTERR", "1");
+ bind_variable ("OPTERR", "1", 0);
sh_opterr = 1;
- if (login_shell == 1)
+ if (login_shell == 1 && posixly_correct == 0)
set_home_var ();
/* Get the full pathname to THIS shell, and set the BASH variable
to it. */
name = get_bash_name ();
- temp_var = bind_variable ("BASH", name);
+ temp_var = bind_variable ("BASH", name, 0);
free (name);
/* Make the exported environment variable SHELL be the user's login
set_shell_var ();
/* Make a variable called BASH_VERSION which contains the version info. */
- bind_variable ("BASH_VERSION", shell_version_string ());
+ bind_variable ("BASH_VERSION", shell_version_string (), 0);
#if defined (ARRAY_VARS)
make_vers_array ();
#endif
+ if (command_execution_string)
+ bind_variable ("BASH_EXECUTION_STRING", command_execution_string, 0);
+
/* Find out if we're supposed to be in Posix.2 mode via an
environment variable. */
temp_var = find_variable ("POSIXLY_CORRECT");
that we are remembering commands on the history list. */
if (remember_on_history)
{
- name = bash_tilde_expand (posixly_correct ? "~/.sh_history" : "~/.bash_history");
+ name = bash_tilde_expand (posixly_correct ? "~/.sh_history" : "~/.bash_history", 0);
set_if_not ("HISTFILE", name);
free (name);
-
- set_if_not ("HISTSIZE", "500");
- sv_histsize ("HISTSIZE");
}
#endif /* HISTORY */
/* Seed the random number generator. */
- sbrand (dollar_dollar_pid + (long)shell_start_time);
+ seedrand ();
/* Handle some "special" variables that we may have inherited from a
parent shell. */
{
sv_history_control ("HISTCONTROL");
sv_histignore ("HISTIGNORE");
+ sv_histtimefmt ("HISTTIMEFORMAT");
}
#endif /* HISTORY */
+#if defined (READLINE) && defined (STRICT_POSIX)
+ /* POSIXLY_CORRECT will only be 1 here if the shell was compiled
+ -DSTRICT_POSIX */
+ if (interactive_shell && posixly_correct && no_line_editing == 0)
+ rl_prefer_env_winsize = 1;
+#endif /* READLINE && STRICT_POSIX */
+
+ /*
+ * 24 October 2001
+ *
+ * I'm tired of the arguing and bug reports. Bash now leaves SSH_CLIENT
+ * and SSH2_CLIENT alone. I'm going to rely on the shell_level check in
+ * isnetconn() to avoid running the startup files more often than wanted.
+ * That will, of course, only work if the user's login shell is bash, so
+ * I've made that behavior conditional on SSH_SOURCE_BASHRC being defined
+ * in config-top.h.
+ */
+#if 0
+ temp_var = find_variable ("SSH_CLIENT");
+ if (temp_var && imported_p (temp_var))
+ {
+ VUNSETATTR (temp_var, att_exported);
+ array_needs_making = 1;
+ }
+ temp_var = find_variable ("SSH2_CLIENT");
+ if (temp_var && imported_p (temp_var))
+ {
+ VUNSETATTR (temp_var, att_exported);
+ array_needs_making = 1;
+ }
+#endif
+
/* Get the user's real and effective user ids. */
uidset ();
+ temp_var = find_variable ("BASH_XTRACEFD");
+ if (temp_var && imported_p (temp_var))
+ sv_xtracefd (temp_var->name);
+
+ sv_shcompat ("BASH_COMPAT");
+
+ /* Allow FUNCNEST to be inherited from the environment. */
+ sv_funcnest ("FUNCNEST");
+
/* Initialize the dynamic variables, and seed their values. */
initialize_dynamic_variables ();
}
+/* **************************************************************** */
+/* */
+/* Setting values for special shell variables */
+/* */
+/* **************************************************************** */
+
+static void
+set_machine_vars ()
+{
+ SHELL_VAR *temp_var;
+
+ temp_var = set_if_not ("HOSTTYPE", HOSTTYPE);
+ temp_var = set_if_not ("OSTYPE", OSTYPE);
+ temp_var = set_if_not ("MACHTYPE", MACHTYPE);
+
+ temp_var = set_if_not ("HOSTNAME", current_host_name);
+}
+
/* Set $HOME to the information in the password file if we didn't get
it from the environment. */
+
+/* This function is not static so the tilde and readline libraries can
+ use it. */
+char *
+sh_get_home_dir ()
+{
+ if (current_user.home_dir == 0)
+ get_current_user_info ();
+ return current_user.home_dir;
+}
+
static void
set_home_var ()
{
temp_var = find_variable ("HOME");
if (temp_var == 0)
- {
- if (current_user.home_dir == 0)
- get_current_user_info ();
- temp_var = bind_variable ("HOME", current_user.home_dir);
- }
- temp_var->attributes |= att_exported;
+ temp_var = bind_variable ("HOME", sh_get_home_dir (), 0);
+#if 0
+ VSETATTR (temp_var, att_exported);
+#endif
}
/* Set $SHELL to the user's login shell if it is not already set. Call
{
if (current_user.shell == 0)
get_current_user_info ();
- temp_var = bind_variable ("SHELL", current_user.shell);
+ temp_var = bind_variable ("SHELL", current_user.shell, 0);
}
- temp_var->attributes |= att_exported;
+#if 0
+ VSETATTR (temp_var, att_exported);
+#endif
}
static char *
{
char *name;
- if ((login_shell == 1) && (*shell_name != '/'))
+ if ((login_shell == 1) && RELPATH(shell_name))
{
if (current_user.shell == 0)
- get_current_user_info ();
+ get_current_user_info ();
name = savestring (current_user.shell);
}
- else if (*shell_name == '/')
+ else if (ABSPATH(shell_name))
name = savestring (shell_name);
else if (shell_name[0] == '.' && shell_name[1] == '/')
{
int len;
cdir = get_string_value ("PWD");
- len = strlen (cdir);
- name = xmalloc (len + strlen (shell_name) + 1);
- strcpy (name, cdir);
- strcpy (name + len, shell_name + 1);
+ if (cdir)
+ {
+ len = strlen (cdir);
+ name = (char *)xmalloc (len + strlen (shell_name) + 1);
+ strcpy (name, cdir);
+ strcpy (name + len, shell_name + 1);
+ }
+ else
+ name = savestring (shell_name);
}
else
{
tname = make_absolute (shell_name, get_string_value ("PWD"));
if (*shell_name == '.')
{
- name = canonicalize_pathname (tname);
+ name = sh_canonpath (tname, PATH_CHECKDOTDOT|PATH_CHECKEXISTS);
if (name == 0)
name = tname;
else
int change;
{
char new_level[5], *old_SHLVL;
- int old_level;
+ intmax_t old_level;
SHELL_VAR *temp_var;
old_SHLVL = get_string_value ("SHLVL");
- old_level = old_SHLVL ? atoi (old_SHLVL) : 0;
+ if (old_SHLVL == 0 || *old_SHLVL == '\0' || legal_number (old_SHLVL, &old_level) == 0)
+ old_level = 0;
shell_level = old_level + change;
if (shell_level < 0)
shell_level = 0;
- else if (shell_level > 1000)
+ else if (shell_level >= 1000)
{
- internal_warning ("shell level (%d) too high, resetting to 1", shell_level);
+ internal_warning (_("shell level (%d) too high, resetting to 1"), shell_level);
shell_level = 1;
}
new_level[3] = '\0';
}
- temp_var = bind_variable ("SHLVL", new_level);
+ temp_var = bind_variable ("SHLVL", new_level, 0);
set_auto_export (temp_var);
}
static void
initialize_shell_level ()
{
-#if 0
+ adjust_shell_level (1);
+}
+
+/* If we got PWD from the environment, update our idea of the current
+ working directory. In any case, make sure that PWD exists before
+ checking it. It is possible for getcwd () to fail on shell startup,
+ and in that case, PWD would be undefined. If this is an interactive
+ login shell, see if $HOME is the current working directory, and if
+ that's not the same string as $PWD, set PWD=$HOME. */
+
+void
+set_pwd ()
+{
+ SHELL_VAR *temp_var, *home_var;
+ char *temp_string, *home_string, *current_dir;
+
+ home_var = find_variable ("HOME");
+ home_string = home_var ? value_cell (home_var) : (char *)NULL;
+
+ temp_var = find_variable ("PWD");
+ /* Follow posix rules for importing PWD */
+ if (temp_var && imported_p (temp_var) &&
+ (temp_string = value_cell (temp_var)) &&
+ temp_string[0] == '/' &&
+ same_file (temp_string, ".", (struct stat *)NULL, (struct stat *)NULL))
+ {
+ current_dir = sh_canonpath (temp_string, PATH_CHECKDOTDOT|PATH_CHECKEXISTS);
+ if (current_dir == 0)
+ current_dir = get_working_directory ("shell_init");
+ else
+ set_working_directory (current_dir);
+ free (current_dir);
+ }
+ else if (home_string && interactive_shell && login_shell &&
+ same_file (home_string, ".", (struct stat *)NULL, (struct stat *)NULL))
+ {
+ set_working_directory (home_string);
+ temp_var = bind_variable ("PWD", home_string, 0);
+ set_auto_export (temp_var);
+ }
+ else
+ {
+ temp_string = get_working_directory ("shell-init");
+ if (temp_string)
+ {
+ temp_var = bind_variable ("PWD", temp_string, 0);
+ set_auto_export (temp_var);
+ free (temp_string);
+ }
+ }
+
+ /* According to the Single Unix Specification, v2, $OLDPWD is an
+ `environment variable' and therefore should be auto-exported. If we
+ don't find OLDPWD in the environment, or it doesn't name a directory,
+ make a dummy invisible variable for OLDPWD, and mark it as exported. */
+ temp_var = find_variable ("OLDPWD");
+ if (temp_var == 0 || value_cell (temp_var) == 0 || file_isdir (value_cell (temp_var)) == 0)
+ {
+ temp_var = bind_variable ("OLDPWD", (char *)NULL, 0);
+ VSETATTR (temp_var, (att_exported | att_invisible));
+ }
+}
+
+/* Make a variable $PPID, which holds the pid of the shell's parent. */
+void
+set_ppid ()
+{
+ char namebuf[INT_STRLEN_BOUND(pid_t) + 1], *name;
SHELL_VAR *temp_var;
- temp_var = set_if_not ("SHLVL", "0");
- set_auto_export (temp_var);
-#endif
- adjust_shell_level (1);
+ name = inttostr (getppid (), namebuf, sizeof(namebuf));
+ temp_var = find_variable ("PPID");
+ if (temp_var)
+ VUNSETATTR (temp_var, (att_readonly | att_exported));
+ temp_var = bind_variable ("PPID", name, 0);
+ VSETATTR (temp_var, (att_readonly | att_integer));
}
static void
uidset ()
{
- char *buff;
+ char buff[INT_STRLEN_BOUND(uid_t) + 1], *b;
register SHELL_VAR *v;
- buff = itos (current_user.uid);
+ b = inttostr (current_user.uid, buff, sizeof (buff));
v = find_variable ("UID");
- if (v)
- v->attributes &= ~att_readonly;
-
- v = bind_variable ("UID", buff);
- v->attributes |= (att_readonly | att_integer);
-
- if (current_user.euid != current_user.uid)
+ if (v == 0)
{
- free (buff);
- buff = itos (current_user.euid);
+ v = bind_variable ("UID", b, 0);
+ VSETATTR (v, (att_readonly | att_integer));
}
- v = find_variable ("EUID");
- if (v)
- v->attributes &= ~att_readonly;
+ if (current_user.euid != current_user.uid)
+ b = inttostr (current_user.euid, buff, sizeof (buff));
- v = bind_variable ("EUID", buff);
- v->attributes |= (att_readonly | att_integer);
- free (buff);
+ v = find_variable ("EUID");
+ if (v == 0)
+ {
+ v = bind_variable ("EUID", b, 0);
+ VSETATTR (v, (att_readonly | att_integer));
+ }
}
#if defined (ARRAY_VARS)
{
SHELL_VAR *vv;
ARRAY *av;
- char *s, d[16];
+ char *s, d[32], b[INT_STRLEN_BOUND(int) + 1];
- makunbound ("BASH_VERSINFO", shell_variables);
+ unbind_variable_noref ("BASH_VERSINFO");
vv = make_new_array_variable ("BASH_VERSINFO");
av = array_cell (vv);
s = strchr (d, '.');
if (s)
*s++ = '\0';
- array_add_element (av, 0, d);
- array_add_element (av, 1, s);
- s = itos (patch_level);
- array_add_element (av, 2, s);
- free (s);
- s = itos (build_version);
- array_add_element (av, 3, s);
- free (s);
- array_add_element (av, 4, release_status);
- array_add_element (av, 5, MACHTYPE);
-
- vv->attributes |= att_readonly;
+ array_insert (av, 0, d);
+ array_insert (av, 1, s);
+ s = inttostr (patch_level, b, sizeof (b));
+ array_insert (av, 2, s);
+ s = inttostr (build_version, b, sizeof (b));
+ array_insert (av, 3, s);
+ array_insert (av, 4, release_status);
+ array_insert (av, 5, MACHTYPE);
+
+ VSETATTR (vv, att_readonly);
}
#endif /* ARRAY_VARS */
/* Set the environment variables $LINES and $COLUMNS in response to
a window size change. */
void
-set_lines_and_columns (lines, cols)
+sh_set_lines_and_columns (lines, cols)
int lines, cols;
{
- char *val;
+ char val[INT_STRLEN_BOUND(int) + 1], *v;
+
+#if defined (READLINE)
+ /* If we are currently assigning to LINES or COLUMNS, don't do anything. */
+ if (winsize_assignment)
+ return;
+#endif
- val = itos (lines);
- bind_variable ("LINES", val);
- free (val);
+ v = inttostr (lines, val, sizeof (val));
+ bind_variable ("LINES", v, 0);
- val = itos (cols);
- bind_variable ("COLUMNS", val);
- free (val);
+ v = inttostr (cols, val, sizeof (val));
+ bind_variable ("COLUMNS", v, 0);
}
-/* Set NAME to VALUE if NAME has no value. */
-SHELL_VAR *
-set_if_not (name, value)
- char *name, *value;
-{
- SHELL_VAR *v;
-
- v = find_variable (name);
- if (v == 0)
- v = bind_variable (name, value);
- return (v);
-}
-
-/* Map FUNCTION over the variables in VARIABLES. Return an array of the
- variables for which FUNCTION returns a non-zero value. A NULL value
- for FUNCTION means to use all variables. */
-SHELL_VAR **
-map_over (function, var_hash_table)
- Function *function;
- HASH_TABLE* var_hash_table;
-{
- register int i;
- register BUCKET_CONTENTS *tlist;
- SHELL_VAR *var, **list;
- int list_index, list_size;
-
- list = (SHELL_VAR **)NULL;
- for (i = list_index = list_size = 0; i < var_hash_table->nbuckets; i++)
- {
- tlist = get_hash_bucket (i, var_hash_table);
-
- while (tlist)
- {
- var = (SHELL_VAR *)tlist->data;
-
- if (!function || (*function) (var))
- {
- if (list_index + 1 >= list_size)
- list = (SHELL_VAR **)
- xrealloc (list, (list_size += 20) * sizeof (SHELL_VAR *));
-
- list[list_index++] = var;
- list[list_index] = (SHELL_VAR *)NULL;
- }
- tlist = tlist->next;
- }
- }
- return (list);
-}
-
-void
-sort_variables (array)
- SHELL_VAR **array;
-{
- qsort (array, array_len ((char **)array), sizeof (SHELL_VAR *), qsort_var_comp);
-}
-
-static int
-qsort_var_comp (var1, var2)
- SHELL_VAR **var1, **var2;
-{
- int result;
-
- if ((result = (*var1)->name[0] - (*var2)->name[0]) == 0)
- result = strcmp ((*var1)->name, (*var2)->name);
-
- return (result);
-}
-
-/* Create a NULL terminated array of all the shell variables in TABLE. */
-static SHELL_VAR **
-all_vars (table)
- HASH_TABLE *table;
-{
- SHELL_VAR **list;
-
- list = map_over ((Function *)NULL, table);
- if (list /* && posixly_correct */)
- sort_variables (list);
- return (list);
-}
-
-/* Create a NULL terminated array of all the shell variables. */
-SHELL_VAR **
-all_shell_variables ()
-{
- return (all_vars (shell_variables));
-}
-
-/* Create a NULL terminated array of all the shell functions. */
-SHELL_VAR **
-all_shell_functions ()
-{
- return (all_vars (shell_functions));
-}
+/* **************************************************************** */
+/* */
+/* Printing variables and values */
+/* */
+/* **************************************************************** */
-/* Print VARS to stdout in such a way that they can be read back in. */
+/* Print LIST (a list of shell variables) to stdout in such a way that
+ they can be read back in. */
void
print_var_list (list)
register SHELL_VAR **list;
register SHELL_VAR *var;
for (i = 0; list && (var = list[i]); i++)
- if (!invisible_p (var))
+ if (invisible_p (var) == 0)
print_assignment (var);
}
-#if defined (NOTDEF)
-/* Print LIST (a linked list of shell variables) to stdout
- by printing the names, without the values. Used to support the
- `set +' command. */
+/* Print LIST (a list of shell functions) to stdout in such a way that
+ they can be read back in. */
void
-print_vars_no_values (list)
+print_func_list (list)
register SHELL_VAR **list;
{
register int i;
register SHELL_VAR *var;
for (i = 0; list && (var = list[i]); i++)
- if (!invisible_p (var))
- printf ("%s\n", var->name);
+ {
+ printf ("%s ", var->name);
+ print_var_function (var);
+ printf ("\n");
+ }
}
-#endif
-
+
/* Print the value of a single SHELL_VAR. No newline is
output, but the variable is printed in such a way that
it can be read back in. */
print_assignment (var)
SHELL_VAR *var;
{
- if (function_p (var) && var->value)
+ if (var_isset (var) == 0)
+ return;
+
+ if (function_p (var))
{
- printf ("%s=", var->name);
+ printf ("%s", var->name);
print_var_function (var);
printf ("\n");
}
#if defined (ARRAY_VARS)
- else if (array_p (var) && var->value)
+ else if (array_p (var))
print_array_assignment (var, 0);
+ else if (assoc_p (var))
+ print_assoc_assignment (var, 0);
#endif /* ARRAY_VARS */
- else if (var->value)
+ else
{
printf ("%s=", var->name);
print_var_value (var, 1);
{
char *t;
- if (var->value)
+ if (var_isset (var) == 0)
+ return;
+
+ if (quote && posixly_correct == 0 && ansic_shouldquote (value_cell (var)))
{
- if (quote && contains_shell_metas (var->value))
- {
- t = single_quote (var->value);
- printf ("%s", t);
- free (t);
- }
- else
- printf ("%s", var->value);
+ t = ansic_quote (value_cell (var), 0, (int *)0);
+ printf ("%s", t);
+ free (t);
+ }
+ else if (quote && sh_contains_shell_metas (value_cell (var)))
+ {
+ t = sh_single_quote (value_cell (var));
+ printf ("%s", t);
+ free (t);
}
+ else
+ printf ("%s", value_cell (var));
}
/* Print the function cell of VAR, a shell variable. Do not
print_var_function (var)
SHELL_VAR *var;
{
- if (function_p (var) && var->value)
- printf ("%s", named_function_string ((char *)NULL, function_cell(var), 1));
-}
-
-#if defined (ARRAY_VARS)
-void
-print_array_assignment (var, quoted)
- SHELL_VAR *var;
- int quoted;
-{
- char *vstr;
-
- if (quoted)
- vstr = quoted_array_assignment_string (array_cell (var));
- else
- vstr = array_to_assignment_string (array_cell (var));
+ char *x;
- if (vstr == 0)
- printf ("%s=%s\n", var->name, quoted ? "'()'" : "()");
- else
+ if (function_p (var) && var_isset (var))
{
- printf ("%s=%s\n", var->name, vstr);
- free (vstr);
+ x = named_function_string ((char *)NULL, function_cell(var), FUNC_MULTILINE|FUNC_EXTERNAL);
+ printf ("%s", x);
}
}
-#endif /* ARRAY_VARS */
/* **************************************************************** */
/* */
-/* Dynamic Variable Extension */
+/* Dynamic Variables */
/* */
/* **************************************************************** */
These are variables whose values are generated anew each time they are
referenced. These are implemented using a pair of function pointers
- in the struct variable: assign_func, which is called from bind_variable,
- and dynamic_value, which is called from find_variable.
-
- assign_func is called from bind_variable, if bind_variable discovers
- that the variable being assigned to has such a function. The function
- is called as
- SHELL_VAR *temp = (*(entry->assign_func)) (entry, value)
+ in the struct variable: assign_func, which is called from bind_variable
+ and, if arrays are compiled into the shell, some of the functions in
+ arrayfunc.c, and dynamic_value, which is called from find_variable.
+
+ assign_func is called from bind_variable_internal, if
+ bind_variable_internal discovers that the variable being assigned to
+ has such a function. The function is called as
+ SHELL_VAR *temp = (*(entry->assign_func)) (entry, value, ind)
and the (SHELL_VAR *)temp is returned as the value of bind_variable. It
- is usually ENTRY (self).
+ is usually ENTRY (self). IND is an index for an array variable, and
+ unused otherwise.
- dynamic_value is called from find_variable to return a `new' value for
- the specified dynamic varible. If this function is NULL, the variable
- is treated as a `normal' shell variable. If it is not, however, then
- this function is called like this:
- tempvar = (*(var->dynamic_value)) (var);
+ dynamic_value is called from find_variable_internal to return a `new'
+ value for the specified dynamic varible. If this function is NULL,
+ the variable is treated as a `normal' shell variable. If it is not,
+ however, then this function is called like this:
+ tempvar = (*(var->dynamic_value)) (var);
Sometimes `tempvar' will replace the value of `var'. Other times, the
shell will simply use the string value. Pretty object-oriented, huh?
special meaning, even if you subsequently set it.
The special assignment code would probably have been better put in
- subst.c: do_assignment, in the same style as
+ subst.c: do_assignment_internal, in the same style as
stupidly_hack_special_variables, but I wanted the changes as
localized as possible. */
+#define INIT_DYNAMIC_VAR(var, val, gfunc, afunc) \
+ do \
+ { \
+ v = bind_variable (var, (val), 0); \
+ v->dynamic_value = gfunc; \
+ v->assign_func = afunc; \
+ } \
+ while (0)
+
+#define INIT_DYNAMIC_ARRAY_VAR(var, gfunc, afunc) \
+ do \
+ { \
+ v = make_new_array_variable (var); \
+ v->dynamic_value = gfunc; \
+ v->assign_func = afunc; \
+ } \
+ while (0)
+
+#define INIT_DYNAMIC_ASSOC_VAR(var, gfunc, afunc) \
+ do \
+ { \
+ v = make_new_assoc_variable (var); \
+ v->dynamic_value = gfunc; \
+ v->assign_func = afunc; \
+ } \
+ while (0)
+
+static SHELL_VAR *
+null_assign (self, value, unused, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t unused;
+ char *key;
+{
+ return (self);
+}
+
+#if defined (ARRAY_VARS)
+static SHELL_VAR *
+null_array_assign (self, value, ind, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t ind;
+ char *key;
+{
+ return (self);
+}
+#endif
+
+/* Degenerate `dynamic_value' function; just returns what's passed without
+ manipulation. */
+static SHELL_VAR *
+get_self (self)
+ SHELL_VAR *self;
+{
+ return (self);
+}
+
+#if defined (ARRAY_VARS)
+/* A generic dynamic array variable initializer. Initialize array variable
+ NAME with dynamic value function GETFUNC and assignment function SETFUNC. */
+static SHELL_VAR *
+init_dynamic_array_var (name, getfunc, setfunc, attrs)
+ char *name;
+ sh_var_value_func_t *getfunc;
+ sh_var_assign_func_t *setfunc;
+ int attrs;
+{
+ SHELL_VAR *v;
+
+ v = find_variable (name);
+ if (v)
+ return (v);
+ INIT_DYNAMIC_ARRAY_VAR (name, getfunc, setfunc);
+ if (attrs)
+ VSETATTR (v, attrs);
+ return v;
+}
+
+static SHELL_VAR *
+init_dynamic_assoc_var (name, getfunc, setfunc, attrs)
+ char *name;
+ sh_var_value_func_t *getfunc;
+ sh_var_assign_func_t *setfunc;
+ int attrs;
+{
+ SHELL_VAR *v;
+
+ v = find_variable (name);
+ if (v)
+ return (v);
+ INIT_DYNAMIC_ASSOC_VAR (name, getfunc, setfunc);
+ if (attrs)
+ VSETATTR (v, attrs);
+ return v;
+}
+#endif
+
/* The value of $SECONDS. This is the number of seconds since shell
invocation, or, the number of seconds since the last assignment + the
value of the last assignment. */
-static long seconds_value_assigned;
+static intmax_t seconds_value_assigned;
static SHELL_VAR *
-assign_seconds (self, value)
+assign_seconds (self, value, unused, key)
SHELL_VAR *self;
char *value;
+ arrayind_t unused;
+ char *key;
{
- seconds_value_assigned = strtol (value, (char **)NULL, 10);
+ if (legal_number (value, &seconds_value_assigned) == 0)
+ seconds_value_assigned = 0;
shell_start_time = NOW;
return (self);
}
char *p;
time_since_start = NOW - shell_start_time;
- p = itos((int) seconds_value_assigned + time_since_start);
+ p = itos(seconds_value_assigned + time_since_start);
- FREE (var->value);
+ FREE (value_cell (var));
- var->attributes |= att_integer;
- var->value = p;
+ VSETATTR (var, att_integer);
+ var_setvalue (var, p);
return (var);
}
+static SHELL_VAR *
+init_seconds_var ()
+{
+ SHELL_VAR *v;
+
+ v = find_variable ("SECONDS");
+ if (v)
+ {
+ if (legal_number (value_cell(v), &seconds_value_assigned) == 0)
+ seconds_value_assigned = 0;
+ }
+ INIT_DYNAMIC_VAR ("SECONDS", (v ? value_cell (v) : (char *)NULL), get_seconds, assign_seconds);
+ return v;
+}
+
/* The random number seed. You can change this by setting RANDOM. */
static unsigned long rseed = 1;
-static unsigned long last_random_value;
+static int last_random_value;
+static int seeded_subshell = 0;
-/* A linear congruential random number generator based on the ANSI
- C standard. This one isn't very good (the values are alternately
- odd and even, for example), but a more complicated one is overkill. */
+/* A linear congruential random number generator based on the example
+ one in the ANSI C standard. This one isn't very good, but a more
+ complicated one is overkill. */
/* Returns a pseudo-random number between 0 and 32767. */
static int
brand ()
{
- rseed = rseed * 1103515245 + 12345;
+ /* From "Random number generators: good ones are hard to find",
+ Park and Miller, Communications of the ACM, vol. 31, no. 10,
+ October 1988, p. 1195. filtered through FreeBSD */
+ long h, l;
+
+ /* Can't seed with 0. */
+ if (rseed == 0)
+ rseed = 123459876;
+ h = rseed / 127773;
+ l = rseed % 127773;
+ rseed = 16807 * l - 2836 * h;
+#if 0
+ if (rseed < 0)
+ rseed += 0x7fffffff;
+#endif
return ((unsigned int)(rseed & 32767)); /* was % 32768 */
}
/* Set the random number generator seed to SEED. */
static void
sbrand (seed)
- int seed;
+ unsigned long seed;
{
rseed = seed;
last_random_value = 0;
}
+static void
+seedrand ()
+{
+ struct timeval tv;
+
+ gettimeofday (&tv, NULL);
+ sbrand (tv.tv_sec ^ tv.tv_usec ^ getpid ());
+}
+
static SHELL_VAR *
-assign_random (self, value)
+assign_random (self, value, unused, key)
SHELL_VAR *self;
char *value;
+ arrayind_t unused;
+ char *key;
{
- sbrand (atoi (value));
+ sbrand (strtoul (value, (char **)NULL, 10));
+ if (subshell_environment)
+ seeded_subshell = getpid ();
return (self);
}
-static SHELL_VAR *
-get_random (var)
- SHELL_VAR *var;
+int
+get_random_number ()
{
- int rv;
- char *p;
+ int rv, pid;
/* Reset for command and process substitution. */
- if (subshell_environment)
- sbrand (rseed + (int)(getpid() + NOW));
+ pid = getpid ();
+ if (subshell_environment && seeded_subshell != pid)
+ {
+ seedrand ();
+ seeded_subshell = pid;
+ }
do
rv = brand ();
- while (rv == (int)last_random_value);
+ while (rv == last_random_value);
+ return rv;
+}
+
+static SHELL_VAR *
+get_random (var)
+ SHELL_VAR *var;
+{
+ int rv;
+ char *p;
+ rv = get_random_number ();
last_random_value = rv;
- p = itos ((int)rv);
+ p = itos (rv);
- FREE (var->value);
+ FREE (value_cell (var));
- var->attributes |= att_integer;
- var->value = p;
+ VSETATTR (var, att_integer);
+ var_setvalue (var, p);
return (var);
}
+static SHELL_VAR *
+assign_lineno (var, value, unused, key)
+ SHELL_VAR *var;
+ char *value;
+ arrayind_t unused;
+ char *key;
+{
+ intmax_t new_value;
+
+ if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0)
+ new_value = 0;
+ line_number = line_number_base = new_value;
+ return var;
+}
+
/* Function which returns the current line number. */
static SHELL_VAR *
get_lineno (var)
ln = executing_line_number ();
p = itos (ln);
- FREE (var->value);
- var->value = p;
+ FREE (value_cell (var));
+ var_setvalue (var, p);
return (var);
}
static SHELL_VAR *
-assign_lineno (var, value)
+assign_subshell (var, value, unused, key)
SHELL_VAR *var;
char *value;
+ arrayind_t unused;
+ char *key;
{
- line_number = atoi (value);
+ intmax_t new_value;
+
+ if (value == 0 || *value == '\0' || legal_number (value, &new_value) == 0)
+ new_value = 0;
+ subshell_level = new_value;
return var;
}
+static SHELL_VAR *
+get_subshell (var)
+ SHELL_VAR *var;
+{
+ char *p;
+
+ p = itos (subshell_level);
+ FREE (value_cell (var));
+ var_setvalue (var, p);
+ return (var);
+}
+
+static SHELL_VAR *
+get_bashpid (var)
+ SHELL_VAR *var;
+{
+ int pid;
+ char *p;
+
+ pid = getpid ();
+ p = itos (pid);
+
+ FREE (value_cell (var));
+ VSETATTR (var, att_integer|att_readonly);
+ var_setvalue (var, p);
+ return (var);
+}
+
+static SHELL_VAR *
+get_bash_command (var)
+ SHELL_VAR *var;
+{
+ char *p;
+
+ if (the_printed_command_except_trap)
+ p = savestring (the_printed_command_except_trap);
+ else
+ {
+ p = (char *)xmalloc (1);
+ p[0] = '\0';
+ }
+ FREE (value_cell (var));
+ var_setvalue (var, p);
+ return (var);
+}
+
#if defined (HISTORY)
static SHELL_VAR *
get_histcmd (var)
char *p;
p = itos (history_number ());
- FREE (var->value);
- var->value = p;
+ FREE (value_cell (var));
+ var_setvalue (var, p);
return (var);
}
#endif
-#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
+#if defined (READLINE)
+/* When this function returns, VAR->value points to malloced memory. */
static SHELL_VAR *
-get_dirstack (self)
- SHELL_VAR *self;
+get_comp_wordbreaks (var)
+ SHELL_VAR *var;
{
- ARRAY *a;
- WORD_LIST *l;
+ /* If we don't have anything yet, assign a default value. */
+ if (rl_completer_word_break_characters == 0 && bash_readline_initialized == 0)
+ enable_hostname_completion (perform_hostname_completion);
- l = get_directory_stack ();
- a = word_list_to_array (l);
- dispose_array (array_cell (self));
- dispose_words (l);
- self->value = (char *)a;
- return self;
+ FREE (value_cell (var));
+ var_setvalue (var, savestring (rl_completer_word_break_characters));
+
+ return (var);
}
-static SHELL_VAR *
-assign_dirstack (self, ind, value)
+/* When this function returns, rl_completer_word_break_characters points to
+ malloced memory. */
+static SHELL_VAR *
+assign_comp_wordbreaks (self, value, unused, key)
SHELL_VAR *self;
- int ind;
char *value;
+ arrayind_t unused;
+ char *key;
{
- set_dirstack_element (ind, 1, value);
+ if (rl_completer_word_break_characters &&
+ rl_completer_word_break_characters != rl_basic_word_break_characters)
+ free (rl_completer_word_break_characters);
+
+ rl_completer_word_break_characters = savestring (value);
return self;
}
-#endif /* PUSHD AND POPD && ARRAY_VARS */
+#endif /* READLINE */
-#if defined (ARRAY_VARS)
+#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
+static SHELL_VAR *
+assign_dirstack (self, value, ind, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t ind;
+ char *key;
+{
+ set_dirstack_element (ind, 1, value);
+ return self;
+}
+
+static SHELL_VAR *
+get_dirstack (self)
+ SHELL_VAR *self;
+{
+ ARRAY *a;
+ WORD_LIST *l;
+
+ l = get_directory_stack (0);
+ a = array_from_word_list (l);
+ array_dispose (array_cell (self));
+ dispose_words (l);
+ var_setarray (self, a);
+ return self;
+}
+#endif /* PUSHD AND POPD && ARRAY_VARS */
+
+#if defined (ARRAY_VARS)
/* We don't want to initialize the group set with a call to getgroups()
unless we're asked to, but we only want to do it once. */
static SHELL_VAR *
group_set = get_group_list (&ng);
a = array_cell (self);
for (i = 0; i < ng; i++)
- array_add_element (a, i, group_set[i]);
+ array_insert (a, i, group_set[i]);
+ }
+ return (self);
+}
+
+static SHELL_VAR *
+build_hashcmd (self)
+ SHELL_VAR *self;
+{
+ HASH_TABLE *h;
+ int i;
+ char *k, *v;
+ BUCKET_CONTENTS *item;
+
+ h = assoc_cell (self);
+ if (h)
+ assoc_dispose (h);
+
+ if (hashed_filenames == 0 || HASH_ENTRIES (hashed_filenames) == 0)
+ {
+ var_setvalue (self, (char *)NULL);
+ return self;
+ }
+
+ h = assoc_create (hashed_filenames->nbuckets);
+ for (i = 0; i < hashed_filenames->nbuckets; i++)
+ {
+ for (item = hash_items (i, hashed_filenames); item; item = item->next)
+ {
+ k = savestring (item->key);
+ v = pathdata(item)->path;
+ assoc_insert (h, k, v);
+ }
+ }
+
+ var_setvalue (self, (char *)h);
+ return self;
+}
+
+static SHELL_VAR *
+get_hashcmd (self)
+ SHELL_VAR *self;
+{
+ build_hashcmd (self);
+ return (self);
+}
+
+static SHELL_VAR *
+assign_hashcmd (self, value, ind, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t ind;
+ char *key;
+{
+#if defined (RESTRICTED_SHELL)
+ if (restricted && strchr (value, '/'))
+ {
+ sh_restricted (value);
+ return (SHELL_VAR *)NULL;
+ }
+#endif
+ phash_insert (key, value, 0, 0);
+ return (build_hashcmd (self));
+}
+
+#if defined (ALIAS)
+static SHELL_VAR *
+build_aliasvar (self)
+ SHELL_VAR *self;
+{
+ HASH_TABLE *h;
+ int i;
+ char *k, *v;
+ BUCKET_CONTENTS *item;
+
+ h = assoc_cell (self);
+ if (h)
+ assoc_dispose (h);
+
+ if (aliases == 0 || HASH_ENTRIES (aliases) == 0)
+ {
+ var_setvalue (self, (char *)NULL);
+ return self;
+ }
+
+ h = assoc_create (aliases->nbuckets);
+ for (i = 0; i < aliases->nbuckets; i++)
+ {
+ for (item = hash_items (i, aliases); item; item = item->next)
+ {
+ k = savestring (item->key);
+ v = ((alias_t *)(item->data))->value;
+ assoc_insert (h, k, v);
+ }
}
+
+ var_setvalue (self, (char *)h);
+ return self;
+}
+
+static SHELL_VAR *
+get_aliasvar (self)
+ SHELL_VAR *self;
+{
+ build_aliasvar (self);
return (self);
}
+
+static SHELL_VAR *
+assign_aliasvar (self, value, ind, key)
+ SHELL_VAR *self;
+ char *value;
+ arrayind_t ind;
+ char *key;
+{
+ add_alias (key, value);
+ return (build_aliasvar (self));
+}
+#endif /* ALIAS */
+
#endif /* ARRAY_VARS */
-
+
+/* If ARRAY_VARS is not defined, this just returns the name of any
+ currently-executing function. If we have arrays, it's a call stack. */
+static SHELL_VAR *
+get_funcname (self)
+ SHELL_VAR *self;
+{
+#if ! defined (ARRAY_VARS)
+ char *t;
+ if (variable_context && this_shell_function)
+ {
+ FREE (value_cell (self));
+ t = savestring (this_shell_function->name);
+ var_setvalue (self, t);
+ }
+#endif
+ return (self);
+}
+
+void
+make_funcname_visible (on_or_off)
+ int on_or_off;
+{
+ SHELL_VAR *v;
+
+ v = find_variable ("FUNCNAME");
+ if (v == 0 || v->dynamic_value == 0)
+ return;
+
+ if (on_or_off)
+ VUNSETATTR (v, att_invisible);
+ else
+ VSETATTR (v, att_invisible);
+}
+
+static SHELL_VAR *
+init_funcname_var ()
+{
+ SHELL_VAR *v;
+
+ v = find_variable ("FUNCNAME");
+ if (v)
+ return v;
+#if defined (ARRAY_VARS)
+ INIT_DYNAMIC_ARRAY_VAR ("FUNCNAME", get_funcname, null_array_assign);
+#else
+ INIT_DYNAMIC_VAR ("FUNCNAME", (char *)NULL, get_funcname, null_assign);
+#endif
+ VSETATTR (v, att_invisible|att_noassign);
+ return v;
+}
+
static void
initialize_dynamic_variables ()
{
SHELL_VAR *v;
- v = bind_variable ("SECONDS", (char *)NULL);
- v->dynamic_value = get_seconds;
- v->assign_func = assign_seconds;
+ v = init_seconds_var ();
- v = bind_variable ("RANDOM", (char *)NULL);
- v->dynamic_value = get_random;
- v->assign_func = assign_random;
+ INIT_DYNAMIC_VAR ("BASH_COMMAND", (char *)NULL, get_bash_command, (sh_var_assign_func_t *)NULL);
+ INIT_DYNAMIC_VAR ("BASH_SUBSHELL", (char *)NULL, get_subshell, assign_subshell);
- v = bind_variable ("LINENO", (char *)NULL);
- v->dynamic_value = get_lineno;
- v->assign_func = assign_lineno;
+ INIT_DYNAMIC_VAR ("RANDOM", (char *)NULL, get_random, assign_random);
+ VSETATTR (v, att_integer);
+ INIT_DYNAMIC_VAR ("LINENO", (char *)NULL, get_lineno, assign_lineno);
+ VSETATTR (v, att_integer);
+
+ INIT_DYNAMIC_VAR ("BASHPID", (char *)NULL, get_bashpid, null_assign);
+ VSETATTR (v, att_integer|att_readonly);
#if defined (HISTORY)
- v = bind_variable ("HISTCMD", (char *)NULL);
- v->dynamic_value = get_histcmd;
- v->assign_func = (DYNAMIC_FUNC *)NULL;
+ INIT_DYNAMIC_VAR ("HISTCMD", (char *)NULL, get_histcmd, (sh_var_assign_func_t *)NULL);
+ VSETATTR (v, att_integer);
+#endif
+
+#if defined (READLINE)
+ INIT_DYNAMIC_VAR ("COMP_WORDBREAKS", (char *)NULL, get_comp_wordbreaks, assign_comp_wordbreaks);
#endif
#if defined (PUSHD_AND_POPD) && defined (ARRAY_VARS)
- v = make_new_array_variable ("DIRSTACK");
- v->dynamic_value = get_dirstack;
- v->assign_func = assign_dirstack;
+ v = init_dynamic_array_var ("DIRSTACK", get_dirstack, assign_dirstack, 0);
#endif /* PUSHD_AND_POPD && ARRAY_VARS */
#if defined (ARRAY_VARS)
- v = make_new_array_variable ("GROUPS");
- v->dynamic_value = get_groupset;
- v->assign_func = (DYNAMIC_FUNC *)NULL;
- v->attributes |= att_readonly;
+ v = init_dynamic_array_var ("GROUPS", get_groupset, null_array_assign, att_noassign);
+
+# if defined (DEBUGGER)
+ v = init_dynamic_array_var ("BASH_ARGC", get_self, null_array_assign, att_noassign|att_nounset);
+ v = init_dynamic_array_var ("BASH_ARGV", get_self, null_array_assign, att_noassign|att_nounset);
+# endif /* DEBUGGER */
+ v = init_dynamic_array_var ("BASH_SOURCE", get_self, null_array_assign, att_noassign|att_nounset);
+ v = init_dynamic_array_var ("BASH_LINENO", get_self, null_array_assign, att_noassign|att_nounset);
+
+ v = init_dynamic_assoc_var ("BASH_CMDS", get_hashcmd, assign_hashcmd, att_nofree);
+# if defined (ALIAS)
+ v = init_dynamic_assoc_var ("BASH_ALIASES", get_aliasvar, assign_aliasvar, att_nofree);
+# endif
#endif
+
+ v = init_funcname_var ();
}
+/* **************************************************************** */
+/* */
+/* Retrieving variables and values */
+/* */
+/* **************************************************************** */
+
/* How to get a pointer to the shell variable or function named NAME.
HASHED_VARS is a pointer to the hash table containing the list
of interest (either variables or functions). */
-SHELL_VAR *
-var_lookup (name, hashed_vars)
- char *name;
+
+static SHELL_VAR *
+hash_lookup (name, hashed_vars)
+ const char *name;
HASH_TABLE *hashed_vars;
{
BUCKET_CONTENTS *bucket;
- bucket = find_hash_item (name, hashed_vars);
+ bucket = hash_search (name, hashed_vars, 0);
+ /* If we find the name in HASHED_VARS, set LAST_TABLE_SEARCHED to that
+ table. */
+ if (bucket)
+ last_table_searched = hashed_vars;
return (bucket ? (SHELL_VAR *)bucket->data : (SHELL_VAR *)NULL);
}
+SHELL_VAR *
+var_lookup (name, vcontext)
+ const char *name;
+ VAR_CONTEXT *vcontext;
+{
+ VAR_CONTEXT *vc;
+ SHELL_VAR *v;
+
+ v = (SHELL_VAR *)NULL;
+ for (vc = vcontext; vc; vc = vc->down)
+ if (v = hash_lookup (name, vc->table))
+ break;
+
+ return v;
+}
+
/* Look up the variable entry named NAME. If SEARCH_TEMPENV is non-zero,
- then also search the temporarily built list of exported variables. */
+ then also search the temporarily built list of exported variables.
+ The lookup order is:
+ temporary_env
+ shell_variables list
+*/
+
SHELL_VAR *
-find_variable_internal (name, search_tempenv)
- char *name;
- int search_tempenv;
+find_variable_internal (name, flags)
+ const char *name;
+ int flags;
{
- SHELL_VAR *var = (SHELL_VAR *)NULL;
+ SHELL_VAR *var;
+ int search_tempenv, force_tempenv;
+ VAR_CONTEXT *vc;
+
+ var = (SHELL_VAR *)NULL;
+
+ force_tempenv = (flags & FV_FORCETEMPENV);
/* If explicitly requested, first look in the temporary environment for
the variable. This allows constructs such as "foo=x eval 'echo $foo'"
to get the `exported' value of $foo. This happens if we are executing
a function or builtin, or if we are looking up a variable in a
"subshell environment". */
- if ((search_tempenv || subshell_environment) &&
- (temporary_env || builtin_env || function_env))
- var = find_tempenv_variable (name);
+ search_tempenv = force_tempenv || (expanding_redir == 0 && subshell_environment);
- if (!var)
- var = var_lookup (name, shell_variables);
+ if (search_tempenv && temporary_env)
+ var = hash_lookup (name, temporary_env);
+
+ if (var == 0)
+ {
+ if ((flags & FV_SKIPINVISIBLE) == 0)
+ var = var_lookup (name, shell_variables);
+ else
+ {
+ /* essentially var_lookup expanded inline so we can check for
+ att_invisible */
+ for (vc = shell_variables; vc; vc = vc->down)
+ {
+ var = hash_lookup (name, vc->table);
+ if (var && invisible_p (var))
+ var = 0;
+ if (var)
+ break;
+ }
+ }
+ }
- if (!var)
+ if (var == 0)
return ((SHELL_VAR *)NULL);
return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
}
-/* Look up the variable entry named NAME. Returns the entry or NULL. */
+/* Look up and resolve the chain of nameref variables starting at V all the
+ way to NULL or non-nameref. */
SHELL_VAR *
-find_variable (name)
- char *name;
+find_variable_nameref (v)
+ SHELL_VAR *v;
{
- return (find_variable_internal
- (name, (variable_context || this_shell_builtin || builtin_env)));
-}
+ int level, flags;
+ char *newname, *t;
+ SHELL_VAR *orig, *oldv;
-/* Look up the function entry whose name matches STRING.
- Returns the entry or NULL. */
-SHELL_VAR *
-find_function (name)
- char *name;
-{
- return (var_lookup (name, shell_functions));
+ level = 0;
+ orig = v;
+ while (v && nameref_p (v))
+ {
+ level++;
+ if (level > NAMEREF_MAX)
+ return ((SHELL_VAR *)0); /* error message here? */
+ newname = nameref_cell (v);
+ if (newname == 0 || *newname == '\0')
+ return ((SHELL_VAR *)0);
+ oldv = v;
+ flags = 0;
+ if (expanding_redir == 0 && (assigning_in_environment || executing_builtin))
+ flags |= FV_FORCETEMPENV;
+ /* We don't handle array subscripts here. */
+ v = find_variable_internal (newname, flags);
+ if (v == orig || v == oldv)
+ {
+ internal_warning (_("%s: circular name reference"), orig->name);
+ return ((SHELL_VAR *)0);
+ }
+ }
+ return v;
}
-/* Return the string value of a variable. Return NULL if the variable
- doesn't exist, or only has a function as a value. Don't cons a new
- string. This is a potential memory leak if the variable is found
- in the temporary environment. */
-char *
-get_string_value (var_name)
- char *var_name;
+/* Resolve the chain of nameref variables for NAME. XXX - could change later */
+SHELL_VAR *
+find_variable_last_nameref (name, vflags)
+ const char *name;
+ int vflags;
{
- SHELL_VAR *var;
-
- var = find_variable (var_name);
+ SHELL_VAR *v, *nv;
+ char *newname;
+ int level, flags;
- if (!var)
- return (char *)NULL;
-#if defined (ARRAY_VARS)
- else if (array_p (var))
- return (array_reference (array_cell (var), 0));
-#endif
- else
- return (var->value);
+ nv = v = find_variable_noref (name);
+ level = 0;
+ while (v && nameref_p (v))
+ {
+ level++;
+ if (level > NAMEREF_MAX)
+ return ((SHELL_VAR *)0); /* error message here? */
+ newname = nameref_cell (v);
+ if (newname == 0 || *newname == '\0')
+ return ((vflags && invisible_p (v)) ? v : (SHELL_VAR *)0);
+ nv = v;
+ flags = 0;
+ if (expanding_redir == 0 && (assigning_in_environment || executing_builtin))
+ flags |= FV_FORCETEMPENV;
+ /* We don't accommodate array subscripts here. */
+ v = find_variable_internal (newname, flags);
+ }
+ return nv;
}
-/* Create a local variable referenced by NAME. */
+/* Resolve the chain of nameref variables for NAME. XXX - could change later */
SHELL_VAR *
-make_local_variable (name)
- char *name;
+find_global_variable_last_nameref (name, vflags)
+ const char *name;
+ int vflags;
{
- SHELL_VAR *new_var, *old_var;
- BUCKET_CONTENTS *elt;
+ SHELL_VAR *v, *nv;
+ char *newname;
+ int level;
- /* local foo; local foo; is a no-op. */
- old_var = find_variable (name);
- if (old_var && old_var->context == variable_context)
- return (old_var);
-
- elt = remove_hash_item (name, shell_variables);
- if (elt)
+ nv = v = find_global_variable_noref (name);
+ level = 0;
+ while (v && nameref_p (v))
{
- old_var = (SHELL_VAR *)elt->data;
- free (elt->key);
- free (elt);
+ level++;
+ if (level > NAMEREF_MAX)
+ return ((SHELL_VAR *)0); /* error message here? */
+ newname = nameref_cell (v);
+ if (newname == 0 || *newname == '\0')
+ return ((vflags && invisible_p (v)) ? v : (SHELL_VAR *)0);
+ nv = v;
+ /* We don't accommodate array subscripts here. */
+ v = find_global_variable_noref (newname);
}
- else
- old_var = (SHELL_VAR *)NULL;
+ return nv;
+}
- /* If a variable does not already exist with this name, then
- just make a new one. */
- if (old_var == 0)
- new_var = bind_variable (name, "");
- else
+static SHELL_VAR *
+find_nameref_at_context (v, vc)
+ SHELL_VAR *v;
+ VAR_CONTEXT *vc;
+{
+ SHELL_VAR *nv, *nv2;
+ VAR_CONTEXT *nvc;
+ char *newname;
+ int level;
+
+ nv = v;
+ level = 1;
+ while (nv && nameref_p (nv))
{
- new_var = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
-
- new_var->name = savestring (name);
- new_var->value = xmalloc (1);
- new_var->value[0] = '\0';
-
- new_var->dynamic_value = (DYNAMIC_FUNC *)NULL;
- new_var->assign_func = (DYNAMIC_FUNC *)NULL;
+ level++;
+ if (level > NAMEREF_MAX)
+ return (&nameref_maxloop_value);
+ newname = nameref_cell (nv);
+ if (newname == 0 || *newname == '\0')
+ return ((SHELL_VAR *)NULL);
+ nv2 = hash_lookup (newname, vc->table);
+ if (nv2 == 0)
+ break;
+ nv = nv2;
+ }
+ return nv;
+}
- new_var->attributes = exported_p (old_var) ? att_exported : 0;
+/* Do nameref resolution from the VC, which is the local context for some
+ function or builtin, `up' the chain to the global variables context. If
+ NVCP is not NULL, return the variable context where we finally ended the
+ nameref resolution (so the bind_variable_internal can use the correct
+ variable context and hash table). */
+static SHELL_VAR *
+find_variable_nameref_context (v, vc, nvcp)
+ SHELL_VAR *v;
+ VAR_CONTEXT *vc;
+ VAR_CONTEXT **nvcp;
+{
+ SHELL_VAR *nv, *nv2;
+ VAR_CONTEXT *nvc;
- new_var->prev_context = old_var;
- elt = add_hash_item (savestring (name), shell_variables);
- elt->data = (char *)new_var;
+ /* Look starting at the current context all the way `up' */
+ for (nv = v, nvc = vc; nvc; nvc = nvc->down)
+ {
+ nv2 = find_nameref_at_context (nv, nvc);
+ if (nv2 == &nameref_maxloop_value)
+ return (nv2); /* XXX */
+ if (nv2 == 0)
+ continue;
+ nv = nv2;
+ if (*nvcp)
+ *nvcp = nvc;
+ if (nameref_p (nv) == 0)
+ break;
}
+ return (nameref_p (nv) ? (SHELL_VAR *)NULL : nv);
+}
- new_var->context = variable_context;
- new_var->attributes |= att_local;
+/* Do nameref resolution from the VC, which is the local context for some
+ function or builtin, `up' the chain to the global variables context. If
+ NVCP is not NULL, return the variable context where we finally ended the
+ nameref resolution (so the bind_variable_internal can use the correct
+ variable context and hash table). */
+static SHELL_VAR *
+find_variable_last_nameref_context (v, vc, nvcp)
+ SHELL_VAR *v;
+ VAR_CONTEXT *vc;
+ VAR_CONTEXT **nvcp;
+{
+ SHELL_VAR *nv, *nv2;
+ VAR_CONTEXT *nvc;
- /* XXX */
- if (variable_context >= local_variable_stack_size)
+ /* Look starting at the current context all the way `up' */
+ for (nv = v, nvc = vc; nvc; nvc = nvc->down)
{
- int old_size = local_variable_stack_size;
- RESIZE_MALLOCED_BUFFER (have_local_variables, variable_context, 1,
- local_variable_stack_size, 8);
- bzero ((char *)have_local_variables + old_size,
- local_variable_stack_size - old_size);
+ nv2 = find_nameref_at_context (nv, nvc);
+ if (nv2 == &nameref_maxloop_value)
+ return (nv2); /* XXX */
+ if (nv2 == 0)
+ continue;
+ nv = nv2;
+ if (*nvcp)
+ *nvcp = nvc;
}
- have_local_variables[variable_context] = 1; /* XXX */
-
- return (new_var);
+ return (nameref_p (nv) ? nv : (SHELL_VAR *)NULL);
}
-#if defined (ARRAY_VARS)
SHELL_VAR *
-make_local_array_variable (name)
- char *name;
+find_variable_nameref_for_create (name, flags)
+ const char *name;
+ int flags;
{
SHELL_VAR *var;
- ARRAY *array;
-
- var = make_local_variable (name);
- array = new_array ();
- FREE (value_cell(var));
- var->value = (char *)array;
- var->attributes |= att_array;
- return var;
+ /* See if we have a nameref pointing to a variable that hasn't been
+ created yet. */
+ var = find_variable_last_nameref (name, 1);
+ if ((flags&1) && var && nameref_p (var) && invisible_p (var))
+ {
+ internal_warning (_("%s: removing nameref attribute"), name);
+ VUNSETATTR (var, att_nameref);
+ }
+ if (var && nameref_p (var))
+ {
+ if (legal_identifier (nameref_cell (var)) == 0)
+ {
+ sh_invalidid (nameref_cell (var) ? nameref_cell (var) : "");
+ return ((SHELL_VAR *)INVALID_NAMEREF_VALUE);
+ }
+ }
+ return (var);
}
-#endif /* ARRAY_VARS */
-/* Create a new shell variable with name NAME and add it to the hash table
- of shell variables. */
-static
SHELL_VAR *
-make_new_variable (name)
- char *name;
+find_variable_nameref_for_assignment (name, flags)
+ const char *name;
+ int flags;
{
- SHELL_VAR *entry;
- BUCKET_CONTENTS *elt;
-
- entry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
+ SHELL_VAR *var;
- entry->attributes = 0;
- entry->name = savestring (name);
- entry->value = (char *)NULL;
+ /* See if we have a nameref pointing to a variable that hasn't been
+ created yet. */
+ var = find_variable_last_nameref (name, 1);
+ if (var && nameref_p (var) && invisible_p (var)) /* XXX - flags */
+ {
+ internal_warning (_("%s: removing nameref attribute"), name);
+ VUNSETATTR (var, att_nameref);
+ }
+ if (var && nameref_p (var))
+ {
+ if (valid_nameref_value (nameref_cell (var), 1) == 0)
+ {
+ sh_invalidid (nameref_cell (var) ? nameref_cell (var) : "");
+ return ((SHELL_VAR *)INVALID_NAMEREF_VALUE);
+ }
+ }
+ return (var);
+}
- entry->dynamic_value = (DYNAMIC_FUNC *)NULL;
- entry->assign_func = (DYNAMIC_FUNC *)NULL;
+/* Find a variable, forcing a search of the temporary environment first */
+SHELL_VAR *
+find_variable_tempenv (name)
+ const char *name;
+{
+ SHELL_VAR *var;
- /* Always assume variables are to be made at toplevel!
- make_local_variable has the responsibilty of changing the
- variable context. */
- entry->context = 0;
- entry->prev_context = (SHELL_VAR *)NULL;
+ var = find_variable_internal (name, FV_FORCETEMPENV);
+ if (var && nameref_p (var))
+ var = find_variable_nameref (var);
+ return (var);
+}
- elt = add_hash_item (savestring (name), shell_variables);
- elt->data = (char *)entry;
+/* Find a variable, not forcing a search of the temporary environment first */
+SHELL_VAR *
+find_variable_notempenv (name)
+ const char *name;
+{
+ SHELL_VAR *var;
- return entry;
+ var = find_variable_internal (name, 0);
+ if (var && nameref_p (var))
+ var = find_variable_nameref (var);
+ return (var);
}
-#if defined (ARRAY_VARS)
+SHELL_VAR *
+find_global_variable (name)
+ const char *name;
+{
+ SHELL_VAR *var;
+
+ var = var_lookup (name, global_variables);
+ if (var && nameref_p (var))
+ var = find_variable_nameref (var);
+
+ if (var == 0)
+ return ((SHELL_VAR *)NULL);
+
+ return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
+}
+
+SHELL_VAR *
+find_global_variable_noref (name)
+ const char *name;
+{
+ SHELL_VAR *var;
+
+ var = var_lookup (name, global_variables);
+
+ if (var == 0)
+ return ((SHELL_VAR *)NULL);
+
+ return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
+}
+
+SHELL_VAR *
+find_shell_variable (name)
+ const char *name;
+{
+ SHELL_VAR *var;
+
+ var = var_lookup (name, shell_variables);
+ if (var && nameref_p (var))
+ var = find_variable_nameref (var);
+
+ if (var == 0)
+ return ((SHELL_VAR *)NULL);
+
+ return (var->dynamic_value ? (*(var->dynamic_value)) (var) : var);
+}
+
+/* Look up the variable entry named NAME. Returns the entry or NULL. */
+SHELL_VAR *
+find_variable (name)
+ const char *name;
+{
+ SHELL_VAR *v;
+ int flags;
+
+ last_table_searched = 0;
+ flags = 0;
+ if (expanding_redir == 0 && (assigning_in_environment || executing_builtin))
+ flags |= FV_FORCETEMPENV;
+ v = find_variable_internal (name, flags);
+ if (v && nameref_p (v))
+ v = find_variable_nameref (v);
+ return v;
+}
+
+/* Find the first instance of NAME in the variable context chain; return first
+ one found without att_invisible set; return 0 if no non-invisible instances
+ found. */
+SHELL_VAR *
+find_variable_no_invisible (name)
+ const char *name;
+{
+ SHELL_VAR *v;
+ int flags;
+
+ last_table_searched = 0;
+ flags = FV_SKIPINVISIBLE;
+ if (expanding_redir == 0 && (assigning_in_environment || executing_builtin))
+ flags |= FV_FORCETEMPENV;
+ v = find_variable_internal (name, flags);
+ if (v && nameref_p (v))
+ v = find_variable_nameref (v);
+ return v;
+}
+
+/* Find the first instance of NAME in the variable context chain; return first
+ one found even if att_invisible set. */
+SHELL_VAR *
+find_variable_for_assignment (name)
+ const char *name;
+{
+ SHELL_VAR *v;
+ int flags;
+
+ last_table_searched = 0;
+ flags = 0;
+ if (expanding_redir == 0 && (assigning_in_environment || executing_builtin))
+ flags |= FV_FORCETEMPENV;
+ v = find_variable_internal (name, flags);
+ if (v && nameref_p (v))
+ v = find_variable_nameref (v);
+ return v;
+}
+
+SHELL_VAR *
+find_variable_noref (name)
+ const char *name;
+{
+ SHELL_VAR *v;
+ int flags;
+
+ flags = 0;
+ if (expanding_redir == 0 && (assigning_in_environment || executing_builtin))
+ flags |= FV_FORCETEMPENV;
+ v = find_variable_internal (name, flags);
+ return v;
+}
+
+/* Look up the function entry whose name matches STRING.
+ Returns the entry or NULL. */
+SHELL_VAR *
+find_function (name)
+ const char *name;
+{
+ return (hash_lookup (name, shell_functions));
+}
+
+/* Find the function definition for the shell function named NAME. Returns
+ the entry or NULL. */
+FUNCTION_DEF *
+find_function_def (name)
+ const char *name;
+{
+#if defined (DEBUGGER)
+ return ((FUNCTION_DEF *)hash_lookup (name, shell_function_defs));
+#else
+ return ((FUNCTION_DEF *)0);
+#endif
+}
+
+/* Return the value of VAR. VAR is assumed to have been the result of a
+ lookup without any subscript, if arrays are compiled into the shell. */
+char *
+get_variable_value (var)
+ SHELL_VAR *var;
+{
+ if (var == 0)
+ return ((char *)NULL);
+#if defined (ARRAY_VARS)
+ else if (array_p (var))
+ return (array_reference (array_cell (var), 0));
+ else if (assoc_p (var))
+ return (assoc_reference (assoc_cell (var), "0"));
+#endif
+ else
+ return (value_cell (var));
+}
+
+/* Return the string value of a variable. Return NULL if the variable
+ doesn't exist. Don't cons a new string. This is a potential memory
+ leak if the variable is found in the temporary environment, but doesn't
+ leak in practice. Since functions and variables have separate name
+ spaces, returns NULL if var_name is a shell function only. */
+char *
+get_string_value (var_name)
+ const char *var_name;
+{
+ SHELL_VAR *var;
+
+ var = find_variable (var_name);
+ return ((var) ? get_variable_value (var) : (char *)NULL);
+}
+
+/* This is present for use by the tilde and readline libraries. */
+char *
+sh_get_env_value (v)
+ const char *v;
+{
+ return get_string_value (v);
+}
+
+/* **************************************************************** */
+/* */
+/* Creating and setting variables */
+/* */
+/* **************************************************************** */
+
+/* Set NAME to VALUE if NAME has no value. */
+SHELL_VAR *
+set_if_not (name, value)
+ char *name, *value;
+{
+ SHELL_VAR *v;
+
+ if (shell_variables == 0)
+ create_variable_tables ();
+
+ v = find_variable (name);
+ if (v == 0)
+ v = bind_variable_internal (name, value, global_variables->table, HASH_NOSRCH, 0);
+ return (v);
+}
+
+/* Create a local variable referenced by NAME. */
+SHELL_VAR *
+make_local_variable (name)
+ const char *name;
+{
+ SHELL_VAR *new_var, *old_var, *old_ref;
+ VAR_CONTEXT *vc;
+ int was_tmpvar;
+ char *tmp_value;
+
+ /* We don't want to follow the nameref chain when making local variables; we
+ just want to create them. */
+ old_ref = find_variable_noref (name);
+ if (old_ref && nameref_p (old_ref) == 0)
+ old_ref = 0;
+ /* local foo; local foo; is a no-op. */
+ old_var = find_variable (name);
+ if (old_ref == 0 && old_var && local_p (old_var) && old_var->context == variable_context)
+ return (old_var);
+
+ /* local -n foo; local -n foo; is a no-op. */
+ if (old_ref && local_p (old_ref) && old_ref->context == variable_context)
+ return (old_ref);
+
+ /* From here on, we want to use the refvar, not the variable it references */
+ if (old_ref)
+ old_var = old_ref;
+
+ was_tmpvar = old_var && tempvar_p (old_var);
+ /* If we're making a local variable in a shell function, the temporary env
+ has already been merged into the function's variable context stack. We
+ can assume that a temporary var in the same context appears in the same
+ VAR_CONTEXT and can safely be returned without creating a new variable
+ (which results in duplicate names in the same VAR_CONTEXT->table */
+ /* We can't just test tmpvar_p because variables in the temporary env given
+ to a shell function appear in the function's local variable VAR_CONTEXT
+ but retain their tempvar attribute. We want temporary variables that are
+ found in temporary_env, hence the test for last_table_searched, which is
+ set in hash_lookup and only (so far) checked here. */
+ if (was_tmpvar && old_var->context == variable_context && last_table_searched != temporary_env)
+ {
+ VUNSETATTR (old_var, att_invisible); /* XXX */
+ return (old_var);
+ }
+ if (was_tmpvar)
+ tmp_value = value_cell (old_var);
+
+ for (vc = shell_variables; vc; vc = vc->down)
+ if (vc_isfuncenv (vc) && vc->scope == variable_context)
+ break;
+
+ if (vc == 0)
+ {
+ internal_error (_("make_local_variable: no function context at current scope"));
+ return ((SHELL_VAR *)NULL);
+ }
+ else if (vc->table == 0)
+ vc->table = hash_create (TEMPENV_HASH_BUCKETS);
+
+ /* Since this is called only from the local/declare/typeset code, we can
+ call builtin_error here without worry (of course, it will also work
+ for anything that sets this_command_name). Variables with the `noassign'
+ attribute may not be made local. The test against old_var's context
+ level is to disallow local copies of readonly global variables (since I
+ believe that this could be a security hole). Readonly copies of calling
+ function local variables are OK. */
+ if (old_var && (noassign_p (old_var) ||
+ (readonly_p (old_var) && old_var->context == 0)))
+ {
+ if (readonly_p (old_var))
+ sh_readonly (name);
+ else if (noassign_p (old_var))
+ builtin_error (_("%s: variable may not be assigned value"), name);
+#if 0
+ /* Let noassign variables through with a warning */
+ if (readonly_p (old_var))
+#endif
+ return ((SHELL_VAR *)NULL);
+ }
+
+ if (old_var == 0)
+ new_var = make_new_variable (name, vc->table);
+ else
+ {
+ new_var = make_new_variable (name, vc->table);
+
+ /* If we found this variable in one of the temporary environments,
+ inherit its value. Watch to see if this causes problems with
+ things like `x=4 local x'. XXX - see above for temporary env
+ variables with the same context level as variable_context */
+ /* XXX - we should only do this if the variable is not an array. */
+ if (was_tmpvar)
+ var_setvalue (new_var, savestring (tmp_value));
+
+ new_var->attributes = exported_p (old_var) ? att_exported : 0;
+ }
+
+ vc->flags |= VC_HASLOCAL;
+
+ new_var->context = variable_context;
+ VSETATTR (new_var, att_local);
+
+ if (ifsname (name))
+ setifs (new_var);
+
+ if (was_tmpvar == 0 && no_invisible_vars == 0)
+ VSETATTR (new_var, att_invisible); /* XXX */
+ return (new_var);
+}
+
+/* Create a new shell variable with name NAME. */
+static SHELL_VAR *
+new_shell_variable (name)
+ const char *name;
+{
+ SHELL_VAR *entry;
+
+ entry = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
+
+ entry->name = savestring (name);
+ var_setvalue (entry, (char *)NULL);
+ CLEAR_EXPORTSTR (entry);
+
+ entry->dynamic_value = (sh_var_value_func_t *)NULL;
+ entry->assign_func = (sh_var_assign_func_t *)NULL;
+
+ entry->attributes = 0;
+
+ /* Always assume variables are to be made at toplevel!
+ make_local_variable has the responsibility of changing the
+ variable context. */
+ entry->context = 0;
+
+ return (entry);
+}
+
+/* Create a new shell variable with name NAME and add it to the hash table
+ TABLE. */
+static SHELL_VAR *
+make_new_variable (name, table)
+ const char *name;
+ HASH_TABLE *table;
+{
+ SHELL_VAR *entry;
+ BUCKET_CONTENTS *elt;
+
+ entry = new_shell_variable (name);
+
+ /* Make sure we have a shell_variables hash table to add to. */
+ if (shell_variables == 0)
+ create_variable_tables ();
+
+ elt = hash_insert (savestring (name), table, HASH_NOSRCH);
+ elt->data = (PTR_T)entry;
+
+ return entry;
+}
+
+#if defined (ARRAY_VARS)
SHELL_VAR *
make_new_array_variable (name)
char *name;
SHELL_VAR *entry;
ARRAY *array;
- entry = make_new_variable (name);
- array = new_array ();
- entry->value = (char *)array;
- entry->attributes |= att_array;
+ entry = make_new_variable (name, global_variables->table);
+ array = array_create ();
+
+ var_setarray (entry, array);
+ VSETATTR (entry, att_array);
return entry;
}
+
+SHELL_VAR *
+make_local_array_variable (name, assoc_ok)
+ char *name;
+ int assoc_ok;
+{
+ SHELL_VAR *var;
+ ARRAY *array;
+
+ var = make_local_variable (name);
+ if (var == 0 || array_p (var) || (assoc_ok && assoc_p (var)))
+ return var;
+
+ array = array_create ();
+
+ dispose_variable_value (var);
+ var_setarray (var, array);
+ VSETATTR (var, att_array);
+ return var;
+}
+
+SHELL_VAR *
+make_new_assoc_variable (name)
+ char *name;
+{
+ SHELL_VAR *entry;
+ HASH_TABLE *hash;
+
+ entry = make_new_variable (name, global_variables->table);
+ hash = assoc_create (0);
+
+ var_setassoc (entry, hash);
+ VSETATTR (entry, att_assoc);
+ return entry;
+}
+
+SHELL_VAR *
+make_local_assoc_variable (name)
+ char *name;
+{
+ SHELL_VAR *var;
+ HASH_TABLE *hash;
+
+ var = make_local_variable (name);
+ if (var == 0 || assoc_p (var))
+ return var;
+
+ dispose_variable_value (var);
+ hash = assoc_create (0);
+
+ var_setassoc (var, hash);
+ VSETATTR (var, att_assoc);
+ return var;
+}
#endif
char *
-make_variable_value (var, value)
+make_variable_value (var, value, flags)
SHELL_VAR *var;
char *value;
+ int flags;
{
- char *retval;
- long lval;
- int expok;
+ char *retval, *oval;
+ intmax_t lval, rval;
+ int expok, olen, op;
/* If this variable has had its type set to integer (via `declare -i'),
then do expression evaluation on it and store the result. The
- functions in expr.c (evalexp and bind_int_variable) are responsible
+ functions in expr.c (evalexp()) and bind_int_variable() are responsible
for turning off the integer flag if they don't want further
evaluation done. */
if (integer_p (var))
{
- lval = evalexp (value, &expok);
+ if (flags & ASS_APPEND)
+ {
+ oval = value_cell (var);
+ lval = evalexp (oval, &expok); /* ksh93 seems to do this */
+ if (expok == 0)
+ {
+ top_level_cleanup ();
+ jump_to_top_level (DISCARD);
+ }
+ }
+ rval = evalexp (value, &expok);
if (expok == 0)
- jump_to_top_level (DISCARD);
- retval = itos (lval);
+ {
+ top_level_cleanup ();
+ jump_to_top_level (DISCARD);
+ }
+ /* This can be fooled if the variable's value changes while evaluating
+ `rval'. We can change it if we move the evaluation of lval to here. */
+ if (flags & ASS_APPEND)
+ rval += lval;
+ retval = itos (rval);
+ }
+#if defined (CASEMOD_ATTRS)
+ else if (capcase_p (var) || uppercase_p (var) || lowercase_p (var))
+ {
+ if (flags & ASS_APPEND)
+ {
+ oval = get_variable_value (var);
+ if (oval == 0) /* paranoia */
+ oval = "";
+ olen = STRLEN (oval);
+ retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1);
+ strcpy (retval, oval);
+ if (value)
+ strcpy (retval+olen, value);
+ }
+ else if (*value)
+ retval = savestring (value);
+ else
+ {
+ retval = (char *)xmalloc (1);
+ retval[0] = '\0';
+ }
+ op = capcase_p (var) ? CASE_CAPITALIZE
+ : (uppercase_p (var) ? CASE_UPPER : CASE_LOWER);
+ oval = sh_modcase (retval, (char *)0, op);
+ free (retval);
+ retval = oval;
}
+#endif /* CASEMOD_ATTRS */
else if (value)
{
- if (*value)
+ if (flags & ASS_APPEND)
+ {
+ oval = get_variable_value (var);
+ if (oval == 0) /* paranoia */
+ oval = "";
+ olen = STRLEN (oval);
+ retval = (char *)xmalloc (olen + (value ? STRLEN (value) : 0) + 1);
+ strcpy (retval, oval);
+ if (value)
+ strcpy (retval+olen, value);
+ }
+ else if (*value)
retval = savestring (value);
else
{
- retval = xmalloc (1);
+ retval = (char *)xmalloc (1);
retval[0] = '\0';
}
}
return retval;
}
-/* Bind a variable NAME to VALUE. This conses up the name
- and value strings. */
-SHELL_VAR *
-bind_variable (name, value)
- char *name, *value;
+/* Bind a variable NAME to VALUE in the HASH_TABLE TABLE, which may be the
+ temporary environment (but usually is not). */
+static SHELL_VAR *
+bind_variable_internal (name, value, table, hflags, aflags)
+ const char *name;
+ char *value;
+ HASH_TABLE *table;
+ int hflags, aflags;
{
- char *newval;
- SHELL_VAR *entry;
+ char *newval, *tname;
+ SHELL_VAR *entry, *tentry;
- entry = var_lookup (name, shell_variables);
+ entry = (hflags & HASH_NOSRCH) ? (SHELL_VAR *)NULL : hash_lookup (name, table);
+ /* Follow the nameref chain here if this is the global variables table */
+ if (entry && nameref_p (entry) && (invisible_p (entry) == 0) && table == global_variables->table)
+ {
+ entry = find_global_variable (entry->name);
+ /* Let's see if we have a nameref referencing a variable that hasn't yet
+ been created. */
+ if (entry == 0)
+ entry = find_variable_last_nameref (name, 0); /* XXX */
+ if (entry == 0) /* just in case */
+ return (entry);
+ }
- if (entry == 0)
+ /* The first clause handles `declare -n ref; ref=x;' or `declare -n ref;
+ declare -n ref' */
+ if (entry && invisible_p (entry) && nameref_p (entry))
{
- entry = make_new_variable (name);
- entry->value = make_variable_value (entry, value);
+ if ((aflags & ASS_FORCE) == 0 && value && valid_nameref_value (value, 0) == 0)
+ {
+ sh_invalidid (value);
+ return ((SHELL_VAR *)NULL);
+ }
+ goto assign_value;
}
+ else if (entry && nameref_p (entry))
+ {
+ newval = nameref_cell (entry);
#if defined (ARRAY_VARS)
- else if (entry->assign_func && array_p (entry) == 0)
-#else
- else if (entry->assign_func)
+ /* declare -n foo=x[2] ; foo=bar */
+ if (valid_array_reference (newval, 0))
+ {
+ tname = array_variable_name (newval, (char **)0, (int *)0);
+ if (tname && (tentry = find_variable_noref (tname)) && nameref_p (tentry))
+ {
+ /* nameref variables can't be arrays */
+ internal_warning (_("%s: removing nameref attribute"), name_cell (tentry));
+ FREE (value_cell (tentry)); /* XXX - bash-4.3 compat */
+ var_setvalue (tentry, (char *)NULL);
+ VUNSETATTR (tentry, att_nameref);
+ }
+ free (tname);
+ /* XXX - should it be aflags? */
+ entry = assign_array_element (newval, make_variable_value (entry, value, 0), aflags|ASS_NAMEREF);
+ if (entry == 0)
+ return entry;
+ }
+ else
#endif
- return ((*(entry->assign_func)) (entry, value));
+ {
+ entry = make_new_variable (newval, table);
+ var_setvalue (entry, make_variable_value (entry, value, 0));
+ }
+ }
+ else if (entry == 0)
+ {
+ entry = make_new_variable (name, table);
+ var_setvalue (entry, make_variable_value (entry, value, 0)); /* XXX */
+ }
+ else if (entry->assign_func) /* array vars have assign functions now */
+ {
+ INVALIDATE_EXPORTSTR (entry);
+ newval = (aflags & ASS_APPEND) ? make_variable_value (entry, value, aflags) : value;
+ if (assoc_p (entry))
+ entry = (*(entry->assign_func)) (entry, newval, -1, savestring ("0"));
+ else if (array_p (entry))
+ entry = (*(entry->assign_func)) (entry, newval, 0, 0);
+ else
+ entry = (*(entry->assign_func)) (entry, newval, -1, 0);
+ if (newval != value)
+ free (newval);
+ return (entry);
+ }
else
{
- if (readonly_p (entry))
+assign_value:
+ if ((readonly_p (entry) && (aflags & ASS_FORCE) == 0) || noassign_p (entry))
{
- report_error ("%s: readonly variable", name);
+ if (readonly_p (entry))
+ err_readonly (name_cell (entry));
return (entry);
}
/* Variables which are bound are visible. */
- entry->attributes &= ~att_invisible;
+ VUNSETATTR (entry, att_invisible);
- newval = make_variable_value (entry, value);
+#if defined (ARRAY_VARS)
+ if (assoc_p (entry) || array_p (entry))
+ newval = make_array_variable_value (entry, 0, "0", value, aflags);
+ else
+#endif
+
+ newval = make_variable_value (entry, value, aflags); /* XXX */
+
+ /* Invalidate any cached export string */
+ INVALIDATE_EXPORTSTR (entry);
#if defined (ARRAY_VARS)
/* XXX -- this bears looking at again -- XXX */
/* If an existing array variable x is being assigned to with x=b or
`read x' or something of that nature, silently convert it to
x[0]=b or `read x[0]'. */
- if (array_p (entry))
+ if (assoc_p (entry))
{
- array_add_element (array_cell (entry), 0, newval);
+ assoc_insert (assoc_cell (entry), savestring ("0"), newval);
free (newval);
}
- else
+ else if (array_p (entry))
{
- FREE (entry->value);
- entry->value = newval;
+ array_insert (array_cell (entry), 0, newval);
+ free (newval);
}
-#else
- FREE (entry->value);
- entry->value = newval;
+ else
#endif
+ {
+ FREE (value_cell (entry));
+ var_setvalue (entry, newval);
+ }
}
if (mark_modified_vars)
- entry->attributes |= att_exported;
+ VSETATTR (entry, att_exported);
if (exported_p (entry))
array_needs_making = 1;
return (entry);
}
+
+/* Bind a variable NAME to VALUE. This conses up the name
+ and value strings. If we have a temporary environment, we bind there
+ first, then we bind into shell_variables. */
+SHELL_VAR *
+bind_variable (name, value, flags)
+ const char *name;
+ char *value;
+ int flags;
+{
+ SHELL_VAR *v, *nv;
+ VAR_CONTEXT *vc, *nvc;
+ int level;
+
+ if (shell_variables == 0)
+ create_variable_tables ();
+
+ /* If we have a temporary environment, look there first for the variable,
+ and, if found, modify the value there before modifying it in the
+ shell_variables table. This allows sourced scripts to modify values
+ given to them in a temporary environment while modifying the variable
+ value that the caller sees. */
+ if (temporary_env && value) /* XXX - can value be null here? */
+ bind_tempenv_variable (name, value);
+
+ /* XXX -- handle local variables here. */
+ for (vc = shell_variables; vc; vc = vc->down)
+ {
+ if (vc_isfuncenv (vc) || vc_isbltnenv (vc))
+ {
+ v = hash_lookup (name, vc->table);
+ nvc = vc;
+ if (v && nameref_p (v))
+ {
+ nv = find_variable_nameref_context (v, vc, &nvc);
+ if (nv == 0)
+ {
+ nv = find_variable_last_nameref_context (v, vc, &nvc);
+ if (nv && nameref_p (nv))
+ {
+ /* If this nameref variable doesn't have a value yet,
+ set the value. Otherwise, assign using the value as
+ normal. */
+ if (nameref_cell (nv) == 0)
+ return (bind_variable_internal (nv->name, value, nvc->table, 0, flags));
#if defined (ARRAY_VARS)
-/* Convert a shell variable to an array variable. The original value is
- saved as array[0]. */
+ else if (valid_array_reference (nameref_cell (nv), 0))
+ return (assign_array_element (nameref_cell (nv), value, flags));
+ else
+#endif
+ return (bind_variable_internal (nameref_cell (nv), value, nvc->table, 0, flags));
+ }
+ else if (nv == &nameref_maxloop_value)
+ {
+ internal_warning (_("%s: circular name reference"), v->name);
+#if 0
+ return (bind_variable_value (v, value, flags|ASS_NAMEREF));
+#else
+ v = 0; /* backwards compat */
+#endif
+ }
+ else
+ v = nv;
+ }
+ else if (nv == &nameref_maxloop_value)
+ {
+ internal_warning (_("%s: circular name reference"), v->name);
+#if 0
+ return (bind_variable_value (v, value, flags|ASS_NAMEREF));
+#else
+ v = 0; /* backwards compat */
+#endif
+ }
+ else
+ v = nv;
+ }
+ if (v)
+ return (bind_variable_internal (v->name, value, nvc->table, 0, flags));
+ }
+ }
+ /* bind_variable_internal will handle nameref resolution in this case */
+ return (bind_variable_internal (name, value, global_variables->table, 0, flags));
+}
+
SHELL_VAR *
-convert_var_to_array (var)
- SHELL_VAR *var;
+bind_global_variable (name, value, flags)
+ const char *name;
+ char *value;
+ int flags;
{
- char *oldval;
- ARRAY *array;
+ SHELL_VAR *v, *nv;
+ VAR_CONTEXT *vc, *nvc;
+ int level;
- oldval = value_cell (var);
- array = new_array ();
- array_add_element (array, 0, oldval);
- FREE (value_cell (var));
- var->value = (char *)array;
- var->attributes |= att_array;
- var->attributes &= ~att_invisible;
+ if (shell_variables == 0)
+ create_variable_tables ();
- return var;
+ /* bind_variable_internal will handle nameref resolution in this case */
+ return (bind_variable_internal (name, value, global_variables->table, 0, flags));
}
-/* Perform an array assignment name[ind]=value. If NAME already exists and
- is not an array, and IND is 0, perform name=value instead. If NAME exists
- and is not an array, and IND is not 0, convert it into an array with the
- existing value as name[0].
-
- If NAME does not exist, just create an array variable, no matter what
- IND's value may be. */
+/* Make VAR, a simple shell variable, have value VALUE. Once assigned a
+ value, variables are no longer invisible. This is a duplicate of part
+ of the internals of bind_variable. If the variable is exported, or
+ all modified variables should be exported, mark the variable for export
+ and note that the export environment needs to be recreated. */
SHELL_VAR *
-bind_array_variable (name, ind, value)
- char *name;
- int ind;
+bind_variable_value (var, value, aflags)
+ SHELL_VAR *var;
char *value;
+ int aflags;
{
- SHELL_VAR *entry;
- char *newval;
+ char *t;
+ int invis;
- entry = var_lookup (name, shell_variables);
+ invis = invisible_p (var);
+ VUNSETATTR (var, att_invisible);
- if (entry == (SHELL_VAR *) 0)
- entry = make_new_array_variable (name);
- else if (readonly_p (entry))
+ if (var->assign_func)
{
- report_error ("%s: readonly variable", name);
- return (entry);
+ /* If we're appending, we need the old value, so use
+ make_variable_value */
+ t = (aflags & ASS_APPEND) ? make_variable_value (var, value, aflags) : value;
+ (*(var->assign_func)) (var, t, -1, 0);
+ if (t != value && t)
+ free (t);
}
- else if (array_p (entry) == 0)
- entry = convert_var_to_array (entry);
-
- /* ENTRY is an array variable, and ARRAY points to the value. */
- newval = make_variable_value (entry, value);
- if (entry->assign_func)
- (*entry->assign_func) (entry, ind, newval);
else
- array_add_element (array_cell (entry), ind, newval);
- FREE (newval);
+ {
+ t = make_variable_value (var, value, aflags);
+ if ((aflags & (ASS_NAMEREF|ASS_FORCE)) == ASS_NAMEREF && check_selfref (name_cell (var), t, 0))
+ {
+ if (variable_context)
+ internal_warning (_("%s: circular name reference"), name_cell (var));
+ else
+ {
+ internal_error (_("%s: nameref variable self references not allowed"), name_cell (var));
+ free (t);
+ if (invis)
+ VSETATTR (var, att_invisible); /* XXX */
+ return ((SHELL_VAR *)NULL);
+ }
+ }
+ if ((aflags & ASS_NAMEREF) && (valid_nameref_value (t, 0) == 0))
+ {
+ free (t);
+ if (invis)
+ VSETATTR (var, att_invisible); /* XXX */
+ return ((SHELL_VAR *)NULL);
+ }
+ FREE (value_cell (var));
+ var_setvalue (var, t);
+ }
- return (entry);
+ INVALIDATE_EXPORTSTR (var);
+
+ if (mark_modified_vars)
+ VSETATTR (var, att_exported);
+
+ if (exported_p (var))
+ array_needs_making = 1;
+
+ return (var);
}
-/* Perform a compound assignment statement for array NAME, where VALUE is
- the text between the parens: NAME=( VALUE ) */
+/* Bind/create a shell variable with the name LHS to the RHS.
+ This creates or modifies a variable such that it is an integer.
+
+ This used to be in expr.c, but it is here so that all of the
+ variable binding stuff is localized. Since we don't want any
+ recursive evaluation from bind_variable() (possible without this code,
+ since bind_variable() calls the evaluator for variables with the integer
+ attribute set), we temporarily turn off the integer attribute for each
+ variable we set here, then turn it back on after binding as necessary. */
+
SHELL_VAR *
-assign_array_from_string (name, value)
- char *name, *value;
+bind_int_variable (lhs, rhs)
+ char *lhs, *rhs;
{
- SHELL_VAR *var;
+ register SHELL_VAR *v;
+ int isint, isarr, implicitarray;
- var = find_variable (name);
- if (var == 0)
- var = make_new_array_variable (name);
- else if (readonly_p (var))
+ isint = isarr = implicitarray = 0;
+#if defined (ARRAY_VARS)
+ if (valid_array_reference (lhs, 0))
{
- report_error ("%s: readonly variable", name);
- return ((SHELL_VAR *)NULL);
+ isarr = 1;
+ v = array_variable_part (lhs, (char **)0, (int *)0);
+ }
+ else
+#endif
+ v = find_variable (lhs);
+
+ if (v)
+ {
+ isint = integer_p (v);
+ VUNSETATTR (v, att_integer);
+#if defined (ARRAY_VARS)
+ if (array_p (v) && isarr == 0)
+ implicitarray = 1;
+#endif
+ }
+
+#if defined (ARRAY_VARS)
+ if (isarr)
+ v = assign_array_element (lhs, rhs, 0);
+ else if (implicitarray)
+ v = bind_array_variable (lhs, 0, rhs, 0);
+ else
+#endif
+ v = bind_variable (lhs, rhs, 0);
+
+ if (v)
+ {
+ if (isint)
+ VSETATTR (v, att_integer);
+ VUNSETATTR (v, att_invisible);
}
- else if (array_p (var) == 0)
- var = convert_var_to_array (var);
- return (assign_array_var_from_string (var, value));
+ if (v && nameref_p (v))
+ internal_warning (_("%s: assigning integer to name reference"), lhs);
+
+ return (v);
}
SHELL_VAR *
-assign_array_var_from_word_list (var, list)
- SHELL_VAR *var;
- WORD_LIST *list;
+bind_var_to_int (var, val)
+ char *var;
+ intmax_t val;
{
- register int i;
- register WORD_LIST *l;
- ARRAY *a;
+ char ibuf[INT_STRLEN_BOUND (intmax_t) + 1], *p;
- for (a = array_cell (var), l = list, i = 0; l; l = l->next, i++)
- if (var->assign_func)
- (*var->assign_func) (var, i, l->word->word);
- else
- array_add_element (a, i, l->word->word);
- return var;
+ p = fmtulong (val, 10, ibuf, sizeof (ibuf), 0);
+ return (bind_int_variable (var, p));
}
-/* Perform a compound array assignment: VAR->name=( VALUE ). The
- VALUE has already had the parentheses stripped. */
+/* Do a function binding to a variable. You pass the name and
+ the command to bind to. This conses the name and command. */
SHELL_VAR *
-assign_array_var_from_string (var, value)
- SHELL_VAR *var;
- char *value;
+bind_function (name, value)
+ const char *name;
+ COMMAND *value;
{
- ARRAY *a;
- WORD_LIST *list, *nlist;
- char *w, *val, *nval;
- int ni, len, ind, last_ind;
-
- if (value == 0)
- return var;
+ SHELL_VAR *entry;
- /* If this is called from declare_builtin, value[0] == '(' and
- strchr(value, ')') != 0. In this case, we need to extract
- the value from between the parens before going on. */
- if (*value == '(') /*)*/
+ entry = find_function (name);
+ if (entry == 0)
{
- ni = 1;
- val = extract_array_assignment_list (value, &ni);
- if (val == 0)
- return var;
+ BUCKET_CONTENTS *elt;
+
+ elt = hash_insert (savestring (name), shell_functions, HASH_NOSRCH);
+ entry = new_shell_variable (name);
+ elt->data = (PTR_T)entry;
}
else
- val = value;
+ INVALIDATE_EXPORTSTR (entry);
- /* Expand the value string into a list of words, performing all the
- shell expansions including word splitting. */
-#if 1
- /* First we split the string on whitespace, using the shell parser
- (ksh93 seems to do this). */
- list = parse_string_to_word_list (val, "array assign");
- /* Now that we've split it, perform the shell expansions on each
- word in the list. */
- nlist = list ? expand_words_shellexp (list) : (WORD_LIST *)NULL;
- dispose_words (list);
-#else
- nlist = expand_string (val, 0);
+ if (var_isset (entry))
+ dispose_command (function_cell (entry));
+
+ if (value)
+ var_setfunc (entry, copy_command (value));
+ else
+ var_setfunc (entry, 0);
+
+ VSETATTR (entry, att_function);
+
+ if (mark_modified_vars)
+ VSETATTR (entry, att_exported);
+
+ VUNSETATTR (entry, att_invisible); /* Just to be sure */
+
+ if (exported_p (entry))
+ array_needs_making = 1;
+
+#if defined (PROGRAMMABLE_COMPLETION)
+ set_itemlist_dirty (&it_functions);
#endif
- if (val != value)
- free (val);
+ return (entry);
+}
- a = array_cell (var);
+#if defined (DEBUGGER)
+/* Bind a function definition, which includes source file and line number
+ information in addition to the command, into the FUNCTION_DEF hash table.*/
+void
+bind_function_def (name, value)
+ const char *name;
+ FUNCTION_DEF *value;
+{
+ FUNCTION_DEF *entry;
+ BUCKET_CONTENTS *elt;
+ COMMAND *cmd;
- /* Now that we are ready to assign values to the array, kill the existing
- value. */
- if (a)
- empty_array (a);
+ entry = find_function_def (name);
+ if (entry)
+ {
+ dispose_function_def_contents (entry);
+ entry = copy_function_def_contents (value, entry);
+ }
+ else
+ {
+ cmd = value->command;
+ value->command = 0;
+ entry = copy_function_def (value);
+ value->command = cmd;
+
+ elt = hash_insert (savestring (name), shell_function_defs, HASH_NOSRCH);
+ elt->data = (PTR_T *)entry;
+ }
+}
+#endif /* DEBUGGER */
- for (last_ind = 0, list = nlist; list; list = list->next)
+/* Add STRING, which is of the form foo=bar, to the temporary environment
+ HASH_TABLE (temporary_env). The functions in execute_cmd.c are
+ responsible for moving the main temporary env to one of the other
+ temporary environments. The expansion code in subst.c calls this. */
+int
+assign_in_env (word, flags)
+ WORD_DESC *word;
+ int flags;
+{
+ int offset, aflags;
+ char *name, *temp, *value, *newname;
+ SHELL_VAR *var;
+ const char *string;
+
+ string = word->word;
+
+ aflags = 0;
+ offset = assignment (string, 0);
+ newname = name = savestring (string);
+ value = (char *)NULL;
+
+ if (name[offset] == '=')
{
- w = list->word->word;
+ name[offset] = 0;
- /* We have a word of the form [ind]=value */
- if (w[0] == '[')
+ /* don't ignore the `+' when assigning temporary environment */
+ if (name[offset - 1] == '+')
{
- len = skipsubscript (w, 0);
-
- if (w[len] != ']' || w[len+1] != '=')
- {
- nval = make_variable_value (var, w);
- if (var->assign_func)
- (*var->assign_func) (var, last_ind, nval);
- else
- array_add_element (a, last_ind, nval);
- FREE (nval);
- last_ind++;
- continue;
- }
+ name[offset - 1] = '\0';
+ aflags |= ASS_APPEND;
+ }
- if (len == 1)
+ var = find_variable (name);
+ if (var == 0)
+ {
+ var = find_variable_last_nameref (name, 1);
+ /* If we're assigning a value to a nameref variable in the temp
+ environment, and the value of the nameref is valid for assignment,
+ but the variable does not already exist, assign to the nameref
+ target and add the target to the temporary environment. This is
+ what ksh93 does */
+ if (var && nameref_p (var) && valid_nameref_value (nameref_cell (var), 1))
{
- report_error ("%s: bad array subscript", w);
- continue;
+ newname = nameref_cell (var);
+ var = 0; /* don't use it for append */
}
+ }
+ else
+ newname = name_cell (var); /* no-op if not nameref */
+
+ if (var && (readonly_p (var) || noassign_p (var)))
+ {
+ if (readonly_p (var))
+ err_readonly (name);
+ free (name);
+ return (0);
+ }
+ temp = name + offset + 1;
- if (ALL_ELEMENT_SUB (w[1]) && len == 2)
- {
- report_error ("%s: cannot assign to non-numeric index", w);
- continue;
- }
+ value = expand_assignment_string_to_string (temp, 0);
- ind = array_expand_index (w + 1, len);
- if (ind < 0)
+ if (var && (aflags & ASS_APPEND))
+ {
+ if (value == 0)
{
- report_error ("%s: bad array subscript", w);
- continue;
+ value = (char *)xmalloc (1); /* like do_assignment_internal */
+ value[0] = '\0';
}
- last_ind = ind;
- val = w + len + 2;
- }
- else /* No [ind]=value, just a stray `=' */
- {
- ind = last_ind;
- val = w;
+ temp = make_variable_value (var, value, aflags);
+ FREE (value);
+ value = temp;
}
+ }
- if (integer_p (var))
- this_command_name = (char *)NULL; /* no command name for errors */
- nval = make_variable_value (var, val);
- if (var->assign_func)
- (*var->assign_func) (var, ind, nval);
- else
- array_add_element (a, ind, nval);
- FREE (nval);
- last_ind++;
+ if (temporary_env == 0)
+ temporary_env = hash_create (TEMPENV_HASH_BUCKETS);
+
+ var = hash_lookup (newname, temporary_env);
+ if (var == 0)
+ var = make_new_variable (newname, temporary_env);
+ else
+ FREE (value_cell (var));
+
+ if (value == 0)
+ {
+ value = (char *)xmalloc (1); /* see above */
+ value[0] = '\0';
}
- dispose_words (nlist);
- return (var);
+ var_setvalue (var, value);
+ var->attributes |= (att_exported|att_tempvar);
+ var->context = variable_context; /* XXX */
+
+ INVALIDATE_EXPORTSTR (var);
+ var->exportstr = mk_env_string (newname, value, 0);
+
+ array_needs_making = 1;
+
+ if (flags)
+ stupidly_hack_special_variables (newname);
+
+ if (echo_command_at_execute)
+ /* The Korn shell prints the `+ ' in front of assignment statements,
+ so we do too. */
+ xtrace_print_assignment (name, value, 0, 1);
+
+ free (name);
+ return 1;
}
-#endif /* ARRAY_VARS */
+
+/* **************************************************************** */
+/* */
+/* Copying variables */
+/* */
+/* **************************************************************** */
+
+#ifdef INCLUDE_UNUSED
+/* Copy VAR to a new data structure and return that structure. */
+SHELL_VAR *
+copy_variable (var)
+ SHELL_VAR *var;
+{
+ SHELL_VAR *copy = (SHELL_VAR *)NULL;
+
+ if (var)
+ {
+ copy = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
+
+ copy->attributes = var->attributes;
+ copy->name = savestring (var->name);
+
+ if (function_p (var))
+ var_setfunc (copy, copy_command (function_cell (var)));
+#if defined (ARRAY_VARS)
+ else if (array_p (var))
+ var_setarray (copy, array_copy (array_cell (var)));
+ else if (assoc_p (var))
+ var_setassoc (copy, assoc_copy (assoc_cell (var)));
+#endif
+ else if (nameref_cell (var)) /* XXX - nameref */
+ var_setref (copy, savestring (nameref_cell (var)));
+ else if (value_cell (var)) /* XXX - nameref */
+ var_setvalue (copy, savestring (value_cell (var)));
+ else
+ var_setvalue (copy, (char *)NULL);
+
+ copy->dynamic_value = var->dynamic_value;
+ copy->assign_func = var->assign_func;
+
+ copy->exportstr = COPY_EXPORTSTR (var);
+
+ copy->context = var->context;
+ }
+ return (copy);
+}
+#endif
+
+/* **************************************************************** */
+/* */
+/* Deleting and unsetting variables */
+/* */
+/* **************************************************************** */
/* Dispose of the information attached to VAR. */
-void
-dispose_variable (var)
+static void
+dispose_variable_value (var)
SHELL_VAR *var;
{
- if (!var)
- return;
-
if (function_p (var))
dispose_command (function_cell (var));
#if defined (ARRAY_VARS)
else if (array_p (var))
- dispose_array (array_cell (var));
+ array_dispose (array_cell (var));
+ else if (assoc_p (var))
+ assoc_dispose (assoc_cell (var));
#endif
+ else if (nameref_p (var))
+ FREE (nameref_cell (var));
else
FREE (value_cell (var));
+}
+
+void
+dispose_variable (var)
+ SHELL_VAR *var;
+{
+ if (var == 0)
+ return;
+
+ if (nofree_p (var) == 0)
+ dispose_variable_value (var);
+
+ FREE_EXPORTSTR (var);
free (var->name);
free (var);
}
-#if defined (ARRAY_VARS)
-/* This function is called with SUB pointing to just after the beginning
- `[' of an array subscript. */
+/* Unset the shell variable referenced by NAME. Unsetting a nameref variable
+ unsets the variable it resolves to but leaves the nameref alone. */
int
-unbind_array_element (var, sub)
- SHELL_VAR *var;
- char *sub;
+unbind_variable (name)
+ const char *name;
{
- int len, ind;
- ARRAY_ELEMENT *ae;
+ SHELL_VAR *v, *nv;
+ int r;
- len = skipsubscript (sub, 0);
- if (sub[len] != ']' || len == 0)
- {
- builtin_error ("%s[%s: bad array subscript", var->name, sub);
- return -1;
- }
- sub[len] = '\0';
+ v = var_lookup (name, shell_variables);
+ nv = (v && nameref_p (v)) ? find_variable_nameref (v) : (SHELL_VAR *)NULL;
- if (ALL_ELEMENT_SUB (sub[0]) && sub[1] == 0)
- {
- makunbound (var->name, shell_variables);
- return (0);
- }
- ind = array_expand_index (sub, len+1);
- if (ind < 0)
+ r = nv ? makunbound (nv->name, shell_variables) : makunbound (name, shell_variables);
+ return r;
+}
+
+/* Unbind NAME, where NAME is assumed to be a nameref variable */
+int
+unbind_nameref (name)
+ const char *name;
+{
+ SHELL_VAR *v;
+
+ v = var_lookup (name, shell_variables);
+ if (v && nameref_p (v))
+ return makunbound (name, shell_variables);
+ return 0;
+}
+
+/* Unbind the first instance of NAME, whether it's a nameref or not */
+int
+unbind_variable_noref (name)
+ const char *name;
+{
+ SHELL_VAR *v;
+
+ v = var_lookup (name, shell_variables);
+ if (v)
+ return makunbound (name, shell_variables);
+ return 0;
+}
+
+int
+check_unbind_variable (name)
+ const char *name;
+{
+ SHELL_VAR *v;
+
+ v = find_variable (name);
+ if (v && readonly_p (v))
{
- builtin_error ("[%s]: bad array subscript", sub);
+ internal_error (_("%s: cannot unset: readonly %s"), name, "variable");
return -1;
}
- ae = array_delete_element (array_cell (var), ind);
- if (ae)
- destroy_array_element (ae);
- return 0;
+ return (unbind_variable (name));
}
-#endif
-/* Unset the variable referenced by NAME. */
+/* Unset the shell function named NAME. */
int
-unbind_variable (name)
- char *name;
+unbind_func (name)
+ const char *name;
{
- SHELL_VAR *var;
+ BUCKET_CONTENTS *elt;
+ SHELL_VAR *func;
- var = find_variable (name);
- if (!var)
- return (-1);
+ elt = hash_remove (name, shell_functions, 0);
- /* This function should never be called with an array variable name. */
-#if defined (ARRAY_VARS)
- if (array_p (var) == 0 && var->value)
-#else
- if (var->value)
+ if (elt == 0)
+ return -1;
+
+#if defined (PROGRAMMABLE_COMPLETION)
+ set_itemlist_dirty (&it_functions);
#endif
+
+ func = (SHELL_VAR *)elt->data;
+ if (func)
{
- free (var->value);
- var->value = (char *)NULL;
+ if (exported_p (func))
+ array_needs_making++;
+ dispose_variable (func);
}
- makunbound (name, shell_variables);
+ free (elt->key);
+ free (elt);
+
+ return 0;
+}
+
+#if defined (DEBUGGER)
+int
+unbind_function_def (name)
+ const char *name;
+{
+ BUCKET_CONTENTS *elt;
+ FUNCTION_DEF *funcdef;
+
+ elt = hash_remove (name, shell_function_defs, 0);
+
+ if (elt == 0)
+ return -1;
+
+ funcdef = (FUNCTION_DEF *)elt->data;
+ if (funcdef)
+ dispose_function_def (funcdef);
+
+ free (elt->key);
+ free (elt);
+
+ return 0;
+}
+#endif /* DEBUGGER */
+
+int
+delete_var (name, vc)
+ const char *name;
+ VAR_CONTEXT *vc;
+{
+ BUCKET_CONTENTS *elt;
+ SHELL_VAR *old_var;
+ VAR_CONTEXT *v;
+
+ for (elt = (BUCKET_CONTENTS *)NULL, v = vc; v; v = v->down)
+ if (elt = hash_remove (name, v->table, 0))
+ break;
+
+ if (elt == 0)
+ return (-1);
+
+ old_var = (SHELL_VAR *)elt->data;
+ free (elt->key);
+ free (elt);
+ dispose_variable (old_var);
return (0);
}
shell_variables or shell_functions).
Returns non-zero if the variable couldn't be found. */
int
-makunbound (name, hash_list)
- char *name;
- HASH_TABLE *hash_list;
+makunbound (name, vc)
+ const char *name;
+ VAR_CONTEXT *vc;
{
BUCKET_CONTENTS *elt, *new_elt;
- SHELL_VAR *old_var, *new_var;
+ SHELL_VAR *old_var;
+ VAR_CONTEXT *v;
char *t;
- elt = remove_hash_item (name, hash_list);
+ for (elt = (BUCKET_CONTENTS *)NULL, v = vc; v; v = v->down)
+ if (elt = hash_remove (name, v->table, 0))
+ break;
if (elt == 0)
return (-1);
old_var = (SHELL_VAR *)elt->data;
- new_var = old_var->prev_context;
if (old_var && exported_p (old_var))
array_needs_making++;
/* If we're unsetting a local variable and we're still executing inside
- the function, just mark the variable as invisible.
- kill_all_local_variables will clean it up later. This must be done
- so that if the variable is subsequently assigned a new value inside
- the function, the `local' attribute is still present. We also need
- to add it back into the correct hash table. */
+ the function, just mark the variable as invisible. The function
+ eventually called by pop_var_context() will clean it up later. This
+ must be done so that if the variable is subsequently assigned a new
+ value inside the function, the `local' attribute is still present.
+ We also need to add it back into the correct hash table. */
if (old_var && local_p (old_var) && variable_context == old_var->context)
{
- old_var->attributes |= att_invisible;
- new_elt = add_hash_item (savestring (old_var->name), hash_list);
- new_elt->data = (char *)old_var;
+ if (nofree_p (old_var))
+ var_setvalue (old_var, (char *)NULL);
+#if defined (ARRAY_VARS)
+ else if (array_p (old_var))
+ array_dispose (array_cell (old_var));
+ else if (assoc_p (old_var))
+ assoc_dispose (assoc_cell (old_var));
+#endif
+ else if (nameref_p (old_var))
+ FREE (nameref_cell (old_var));
+ else
+ FREE (value_cell (old_var));
+ /* Reset the attributes. Preserve the export attribute if the variable
+ came from a temporary environment. Make sure it stays local, and
+ make it invisible. */
+ old_var->attributes = (exported_p (old_var) && tempvar_p (old_var)) ? att_exported : 0;
+ VSETATTR (old_var, att_local);
+ VSETATTR (old_var, att_invisible);
+ var_setvalue (old_var, (char *)NULL);
+ INVALIDATE_EXPORTSTR (old_var);
+
+ new_elt = hash_insert (savestring (old_var->name), v->table, 0);
+ new_elt->data = (PTR_T)old_var;
stupidly_hack_special_variables (old_var->name);
+
free (elt->key);
free (elt);
return (0);
}
- if (new_var)
- {
- /* Has to be a variable, functions don't have previous contexts. */
- new_elt = add_hash_item (savestring (new_var->name), hash_list);
- new_elt->data = (char *)new_var;
-
- if (exported_p (new_var))
- set_auto_export (new_var);
- }
-
/* Have to save a copy of name here, because it might refer to
old_var->name. If so, stupidly_hack_special_variables will
reference freed memory. */
dispose_variable (old_var);
stupidly_hack_special_variables (t);
free (t);
- return (0);
-}
-
-#ifdef INCLUDE_UNUSED
-/* Remove the variable with NAME if it is a local variable in the
- current context. */
-int
-kill_local_variable (name)
- char *name;
-{
- SHELL_VAR *temp;
- temp = find_variable (name);
- if (temp && temp->context == variable_context)
- {
- makunbound (name, shell_variables);
- return (0);
- }
- return (-1);
+ return (0);
}
-#endif
/* Get rid of all of the variables in the current context. */
-int
-variable_in_context (var)
- SHELL_VAR *var;
-{
- return (var && var->context == variable_context);
-}
-
void
kill_all_local_variables ()
{
- register int i, pass;
- register SHELL_VAR *var, **list;
- HASH_TABLE *varlist;
-
- /* If HAVE_LOCAL_VARIABLES == 0, it means that we don't have any local
- variables at all. If VARIABLE_CONTEXT >= LOCAL_VARIABLE_STACK_SIZE,
- it means that we have some local variables, but not in this variable
- context (level of function nesting). Also, if
- HAVE_LOCAL_VARIABLES[VARIABLE_CONTEXT] == 0, we have no local variables
- at this context. */
- if (have_local_variables == 0 ||
- variable_context >= local_variable_stack_size ||
- have_local_variables[variable_context] == 0)
- return;
-
- for (pass = 0; pass < 2; pass++)
- {
- varlist = pass ? shell_functions : shell_variables;
+ VAR_CONTEXT *vc;
- list = map_over (variable_in_context, varlist);
+ for (vc = shell_variables; vc; vc = vc->down)
+ if (vc_isfuncenv (vc) && vc->scope == variable_context)
+ break;
+ if (vc == 0)
+ return; /* XXX */
- if (list)
- {
- for (i = 0; var = list[i]; i++)
- {
- var->attributes &= ~att_local;
- makunbound (var->name, varlist);
- }
- free (list);
- }
+ if (vc->table && vc_haslocals (vc))
+ {
+ delete_all_variables (vc->table);
+ hash_dispose (vc->table);
}
-
- have_local_variables[variable_context] = 0; /* XXX */
+ vc->table = (HASH_TABLE *)NULL;
}
static void
free_variable_hash_data (data)
- char *data;
+ PTR_T data;
{
- SHELL_VAR *var, *prev;
+ SHELL_VAR *var;
var = (SHELL_VAR *)data;
- while (var)
- {
- prev = var->prev_context;
- dispose_variable (var);
- var = prev;
- }
+ dispose_variable (var);
}
/* Delete the entire contents of the hash table. */
delete_all_variables (hashed_vars)
HASH_TABLE *hashed_vars;
{
- flush_hash_table (hashed_vars, free_variable_hash_data);
-}
-
-static SHELL_VAR *
-new_shell_variable (name)
- char *name;
-{
- SHELL_VAR *var;
-
- var = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
-
- bzero ((char *)var, sizeof (SHELL_VAR));
- var->name = savestring (name);
- return (var);
-}
-
-/* Do a function binding to a variable. You pass the name and
- the command to bind to. This conses the name and command. */
-SHELL_VAR *
-bind_function (name, value)
- char *name;
- COMMAND *value;
-{
- SHELL_VAR *entry;
-
- entry = find_function (name);
- if (!entry)
- {
- BUCKET_CONTENTS *elt;
-
- elt = add_hash_item (savestring (name), shell_functions);
-
- elt->data = (char *)new_shell_variable (name);
- entry = (SHELL_VAR *)elt->data;
- entry->dynamic_value = entry->assign_func = (DYNAMIC_FUNC *)NULL;
-
- /* Functions are always made at the top level. This allows a
- function to define another function (like autoload). */
- entry->context = 0;
- }
-
- if (entry->value)
- dispose_command ((COMMAND *)entry->value);
-
- entry->value = value ? (char *)copy_command (value) : (char *)NULL;
- entry->attributes |= att_function;
-
- if (mark_modified_vars)
- entry->attributes |= att_exported;
-
- entry->attributes &= ~att_invisible; /* Just to be sure */
-
- if (exported_p (entry))
- array_needs_making = 1;
-
- return (entry);
+ hash_flush (hashed_vars, free_variable_hash_data);
}
-#ifdef INCLUDE_UNUSED
-/* Copy VAR to a new data structure and return that structure. */
-SHELL_VAR *
-copy_variable (var)
- SHELL_VAR *var;
-{
- SHELL_VAR *copy = (SHELL_VAR *)NULL;
-
- if (var)
- {
- copy = (SHELL_VAR *)xmalloc (sizeof (SHELL_VAR));
-
- copy->attributes = var->attributes;
- copy->name = savestring (var->name);
-
- if (function_p (var))
- copy->value = (char *)copy_command (function_cell (var));
-#if defined (ARRAY_VARS)
- else if (array_p (var))
- copy->value = (char *)dup_array (array_cell (var));
-#endif
- else if (value_cell (var))
- copy->value = savestring (value_cell (var));
- else
- copy->value = (char *)NULL;
-
- copy->dynamic_value = var->dynamic_value;
- copy->assign_func = var->assign_func;
-
- copy->context = var->context;
-
- /* Don't bother copying previous contexts along with this variable. */
- copy->prev_context = (SHELL_VAR *)NULL;
- }
- return (copy);
-}
-#endif
+/* **************************************************************** */
+/* */
+/* Setting variable attributes */
+/* */
+/* **************************************************************** */
#define FIND_OR_MAKE_VARIABLE(name, entry) \
do \
entry = find_variable (name); \
if (!entry) \
{ \
- entry = bind_variable (name, ""); \
- if (!no_invisible_vars) entry->attributes |= att_invisible; \
+ entry = bind_variable (name, "", 0); \
+ if (!no_invisible_vars && entry) entry->attributes |= att_invisible; \
} \
} \
while (0)
SHELL_VAR *entry;
FIND_OR_MAKE_VARIABLE (name, entry);
- entry->attributes |= att_readonly;
+ VSETATTR (entry, att_readonly);
}
#ifdef INCLUDE_UNUSED
If NAME does not exist, we just punt, like auto_export code below. */
void
set_func_read_only (name)
- char *name;
+ const char *name;
{
SHELL_VAR *entry;
entry = find_function (name);
if (entry)
- entry->attributes |= att_readonly;
+ VSETATTR (entry, att_readonly);
}
/* Make the variable associated with NAME be auto-exported.
/* Make the function associated with NAME be auto-exported. */
void
set_func_auto_export (name)
- char *name;
+ const char *name;
{
SHELL_VAR *entry;
}
#endif
-#if defined (ARRAY_VARS)
-/* This function assumes s[i] == '['; returns with s[ret] == ']' if
- an array subscript is correctly parsed. */
-int
-skipsubscript (s, i)
- char *s;
- int i;
+/* **************************************************************** */
+/* */
+/* Creating lists of variables */
+/* */
+/* **************************************************************** */
+
+static VARLIST *
+vlist_alloc (nentries)
+ int nentries;
{
- int count, c;
+ VARLIST *vlist;
- for (count = 1; count && (c = s[++i]); )
+ vlist = (VARLIST *)xmalloc (sizeof (VARLIST));
+ vlist->list = (SHELL_VAR **)xmalloc ((nentries + 1) * sizeof (SHELL_VAR *));
+ vlist->list_size = nentries;
+ vlist->list_len = 0;
+ vlist->list[0] = (SHELL_VAR *)NULL;
+
+ return vlist;
+}
+
+static VARLIST *
+vlist_realloc (vlist, n)
+ VARLIST *vlist;
+ int n;
+{
+ if (vlist == 0)
+ return (vlist = vlist_alloc (n));
+ if (n > vlist->list_size)
{
- if (c == '[')
- count++;
- else if (c == ']')
- count--;
+ vlist->list_size = n;
+ vlist->list = (SHELL_VAR **)xrealloc (vlist->list, (vlist->list_size + 1) * sizeof (SHELL_VAR *));
}
- return i;
+ return vlist;
}
-#endif /* ARRAY_VARS */
-/* Returns non-zero if STRING is an assignment statement. The returned value
- is the index of the `=' sign. */
-int
-assignment (string)
- char *string;
+static void
+vlist_add (vlist, var, flags)
+ VARLIST *vlist;
+ SHELL_VAR *var;
+ int flags;
{
- register int c, newi, indx;
+ register int i;
- c = string[indx = 0];
+ for (i = 0; i < vlist->list_len; i++)
+ if (STREQ (var->name, vlist->list[i]->name))
+ break;
+ if (i < vlist->list_len)
+ return;
- if (legal_variable_starter (c) == 0)
- return (0);
+ if (i >= vlist->list_size)
+ vlist = vlist_realloc (vlist, vlist->list_size + 16);
- while (c = string[indx])
- {
- /* The following is safe. Note that '=' at the start of a word
- is not an assignment statement. */
- if (c == '=')
- return (indx);
+ vlist->list[vlist->list_len++] = var;
+ vlist->list[vlist->list_len] = (SHELL_VAR *)NULL;
+}
-#if defined (ARRAY_VARS)
- if (c == '[')
- {
- newi = skipsubscript (string, indx);
- if (string[newi++] != ']')
- return (0);
- return ((string[newi] == '=') ? newi : 0);
- }
-#endif /* ARRAY_VARS */
+/* Map FUNCTION over the variables in VAR_HASH_TABLE. Return an array of the
+ variables for which FUNCTION returns a non-zero value. A NULL value
+ for FUNCTION means to use all variables. */
+SHELL_VAR **
+map_over (function, vc)
+ sh_var_map_func_t *function;
+ VAR_CONTEXT *vc;
+{
+ VAR_CONTEXT *v;
+ VARLIST *vlist;
+ SHELL_VAR **ret;
+ int nentries;
+
+ for (nentries = 0, v = vc; v; v = v->down)
+ nentries += HASH_ENTRIES (v->table);
+
+ if (nentries == 0)
+ return (SHELL_VAR **)NULL;
+
+ vlist = vlist_alloc (nentries);
+
+ for (v = vc; v; v = v->down)
+ flatten (v->table, function, vlist, 0);
+
+ ret = vlist->list;
+ free (vlist);
+ return ret;
+}
+
+SHELL_VAR **
+map_over_funcs (function)
+ sh_var_map_func_t *function;
+{
+ VARLIST *vlist;
+ SHELL_VAR **ret;
+
+ if (shell_functions == 0 || HASH_ENTRIES (shell_functions) == 0)
+ return ((SHELL_VAR **)NULL);
+
+ vlist = vlist_alloc (HASH_ENTRIES (shell_functions));
+
+ flatten (shell_functions, function, vlist, 0);
+
+ ret = vlist->list;
+ free (vlist);
+ return ret;
+}
+
+/* Flatten VAR_HASH_TABLE, applying FUNC to each member and adding those
+ elements for which FUNC succeeds to VLIST->list. FLAGS is reserved
+ for future use. Only unique names are added to VLIST. If FUNC is
+ NULL, each variable in VAR_HASH_TABLE is added to VLIST. If VLIST is
+ NULL, FUNC is applied to each SHELL_VAR in VAR_HASH_TABLE. If VLIST
+ and FUNC are both NULL, nothing happens. */
+static void
+flatten (var_hash_table, func, vlist, flags)
+ HASH_TABLE *var_hash_table;
+ sh_var_map_func_t *func;
+ VARLIST *vlist;
+ int flags;
+{
+ register int i;
+ register BUCKET_CONTENTS *tlist;
+ int r;
+ SHELL_VAR *var;
- /* Variable names in assignment statements may contain only letters,
- digits, and `_'. */
- if (legal_variable_char (c) == 0)
- return (0);
+ if (var_hash_table == 0 || (HASH_ENTRIES (var_hash_table) == 0) || (vlist == 0 && func == 0))
+ return;
+
+ for (i = 0; i < var_hash_table->nbuckets; i++)
+ {
+ for (tlist = hash_items (i, var_hash_table); tlist; tlist = tlist->next)
+ {
+ var = (SHELL_VAR *)tlist->data;
- indx++;
+ r = func ? (*func) (var) : 1;
+ if (r && vlist)
+ vlist_add (vlist, var, flags);
+ }
}
- return (0);
}
-#ifdef READLINE
+void
+sort_variables (array)
+ SHELL_VAR **array;
+{
+ qsort (array, strvec_len ((char **)array), sizeof (SHELL_VAR *), (QSFUNC *)qsort_var_comp);
+}
static int
-visible_var (var)
- SHELL_VAR *var;
+qsort_var_comp (var1, var2)
+ SHELL_VAR **var1, **var2;
{
- return (invisible_p (var) == 0);
+ int result;
+
+ if ((result = (*var1)->name[0] - (*var2)->name[0]) == 0)
+ result = strcmp ((*var1)->name, (*var2)->name);
+
+ return (result);
}
+/* Apply FUNC to each variable in SHELL_VARIABLES, adding each one for
+ which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */
static SHELL_VAR **
-_visible_names (table)
- HASH_TABLE *table;
+vapply (func)
+ sh_var_map_func_t *func;
{
SHELL_VAR **list;
- list = map_over (visible_var, table);
-
+ list = map_over (func, shell_variables);
if (list /* && posixly_correct */)
sort_variables (list);
+ return (list);
+}
+
+/* Apply FUNC to each variable in SHELL_FUNCTIONS, adding each one for
+ which FUNC succeeds to an array of SHELL_VAR *s. Returns the array. */
+static SHELL_VAR **
+fapply (func)
+ sh_var_map_func_t *func;
+{
+ SHELL_VAR **list;
+ list = map_over_funcs (func);
+ if (list /* && posixly_correct */)
+ sort_variables (list);
return (list);
}
+/* Create a NULL terminated array of all the shell variables. */
SHELL_VAR **
-all_visible_variables ()
+all_shell_variables ()
+{
+ return (vapply ((sh_var_map_func_t *)NULL));
+}
+
+/* Create a NULL terminated array of all the shell functions. */
+SHELL_VAR **
+all_shell_functions ()
+{
+ return (fapply ((sh_var_map_func_t *)NULL));
+}
+
+static int
+visible_var (var)
+ SHELL_VAR *var;
{
- return (_visible_names (shell_variables));
+ return (invisible_p (var) == 0);
}
SHELL_VAR **
all_visible_functions ()
{
- return (_visible_names (shell_functions));
+ return (fapply (visible_var));
}
-#endif /* READLINE */
+SHELL_VAR **
+all_visible_variables ()
+{
+ return (vapply (visible_var));
+}
/* Return non-zero if the variable VAR is visible and exported. Array
variables cannot be exported. */
return (invisible_p (var) == 0 && exported_p (var));
}
-/* Make an array of assignment statements from the hash table
- HASHED_VARS which contains SHELL_VARs. Only visible, exported
- variables are eligible. */
-char **
-make_var_array (hashed_vars)
- HASH_TABLE *hashed_vars;
+/* Candidate variables for the export environment are either valid variables
+ with the export attribute or invalid variables inherited from the initial
+ environment and simply passed through. */
+static int
+export_environment_candidate (var)
+ SHELL_VAR *var;
{
- register int i, list_index;
- register SHELL_VAR *var;
- char **list, *value;
- SHELL_VAR **vars;
+ return (exported_p (var) && (invisible_p (var) == 0 || imported_p (var)));
+}
- vars = map_over (visible_and_exported, hashed_vars);
+/* Return non-zero if VAR is a local variable in the current context and
+ is exported. */
+static int
+local_and_exported (var)
+ SHELL_VAR *var;
+{
+ return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context && exported_p (var));
+}
- if (vars == 0)
- return (char **)NULL;
+SHELL_VAR **
+all_exported_variables ()
+{
+ return (vapply (visible_and_exported));
+}
- list = (char **)xmalloc ((1 + array_len ((char **)vars)) * sizeof (char *));
+SHELL_VAR **
+local_exported_variables ()
+{
+ return (vapply (local_and_exported));
+}
- for (i = 0, list_index = 0; var = vars[i]; i++)
+static int
+variable_in_context (var)
+ SHELL_VAR *var;
+{
+ return (invisible_p (var) == 0 && local_p (var) && var->context == variable_context);
+}
+
+SHELL_VAR **
+all_local_variables ()
+{
+ VARLIST *vlist;
+ SHELL_VAR **ret;
+ VAR_CONTEXT *vc;
+
+ vc = shell_variables;
+ for (vc = shell_variables; vc; vc = vc->down)
+ if (vc_isfuncenv (vc) && vc->scope == variable_context)
+ break;
+
+ if (vc == 0)
{
- if (function_p (var))
- value = named_function_string ((char *)NULL, function_cell (var), 0);
-#if defined (ARRAY_VARS)
- else if (array_p (var))
-# if 0
- value = array_to_assignment_string (array_cell (var));
-# else
- continue; /* XXX array vars cannot yet be exported */
-# endif
-#endif
- else
- value = value_cell (var);
+ internal_error (_("all_local_variables: no function context at current scope"));
+ return (SHELL_VAR **)NULL;
+ }
+ if (vc->table == 0 || HASH_ENTRIES (vc->table) == 0 || vc_haslocals (vc) == 0)
+ return (SHELL_VAR **)NULL;
+
+ vlist = vlist_alloc (HASH_ENTRIES (vc->table));
+
+ flatten (vc->table, variable_in_context, vlist, 0);
+
+ ret = vlist->list;
+ free (vlist);
+ if (ret)
+ sort_variables (ret);
+ return ret;
+}
- if (value)
- {
- int name_len, value_len;
- char *p;
-
- name_len = strlen (var->name);
- value_len = strlen (value);
- p = list[list_index] = xmalloc (2 + name_len + value_len);
- strcpy (p, var->name);
- p[name_len] = '=';
- strcpy (p + name_len + 1, value);
- list_index++;
#if defined (ARRAY_VARS)
- if (array_p (var))
- free (value);
-#endif
- }
+/* Return non-zero if the variable VAR is visible and an array. */
+static int
+visible_array_vars (var)
+ SHELL_VAR *var;
+{
+ return (invisible_p (var) == 0 && array_p (var));
+}
+
+SHELL_VAR **
+all_array_variables ()
+{
+ return (vapply (visible_array_vars));
+}
+#endif /* ARRAY_VARS */
+
+char **
+all_variables_matching_prefix (prefix)
+ const char *prefix;
+{
+ SHELL_VAR **varlist;
+ char **rlist;
+ int vind, rind, plen;
+
+ plen = STRLEN (prefix);
+ varlist = all_visible_variables ();
+ for (vind = 0; varlist && varlist[vind]; vind++)
+ ;
+ if (varlist == 0 || vind == 0)
+ return ((char **)NULL);
+ rlist = strvec_create (vind + 1);
+ for (vind = rind = 0; varlist[vind]; vind++)
+ {
+ if (plen == 0 || STREQN (prefix, varlist[vind]->name, plen))
+ rlist[rind++] = savestring (varlist[vind]->name);
}
+ rlist[rind] = (char *)0;
+ free (varlist);
- free (vars);
- list[list_index] = (char *)NULL;
- return (list);
+ return rlist;
}
-/* Add STRING to the array of foo=bar strings that we already
- have to add to the environment. */
-int
-assign_in_env (string)
- char *string;
+/* **************************************************************** */
+/* */
+/* Managing temporary variable scopes */
+/* */
+/* **************************************************************** */
+
+/* Make variable NAME have VALUE in the temporary environment. */
+static SHELL_VAR *
+bind_tempenv_variable (name, value)
+ const char *name;
+ char *value;
{
- int size, offset;
- char *name, *temp, *value;
- int nlen, vlen;
- WORD_LIST *list;
SHELL_VAR *var;
- offset = assignment (string);
- name = savestring (string);
- value = (char *)NULL;
+ var = temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL;
- if (name[offset] == '=')
+ if (var)
{
- name[offset] = 0;
+ FREE (value_cell (var));
+ var_setvalue (var, savestring (value));
+ INVALIDATE_EXPORTSTR (var);
+ }
- var = find_variable (name);
- if (var && readonly_p (var))
- {
- report_error ("%s: readonly variable", name);
- free (name);
- return (0);
- }
- temp = name + offset + 1;
- temp = (strchr (temp, '~') != 0) ? bash_tilde_expand (temp) : savestring (temp);
+ return (var);
+}
+
+/* Find a variable in the temporary environment that is named NAME.
+ Return the SHELL_VAR *, or NULL if not found. */
+SHELL_VAR *
+find_tempenv_variable (name)
+ const char *name;
+{
+ return (temporary_env ? hash_lookup (name, temporary_env) : (SHELL_VAR *)NULL);
+}
- list = expand_string_unsplit (temp, 0);
- value = string_list (list);
+char **tempvar_list;
+int tvlist_ind;
- if (list)
- dispose_words (list);
+/* Push the variable described by (SHELL_VAR *)DATA down to the next
+ variable context from the temporary environment. */
+static void
+push_temp_var (data)
+ PTR_T data;
+{
+ SHELL_VAR *var, *v;
+ HASH_TABLE *binding_table;
+
+ var = (SHELL_VAR *)data;
- free (temp);
+ binding_table = shell_variables->table;
+ if (binding_table == 0)
+ {
+ if (shell_variables == global_variables)
+ /* shouldn't happen */
+ binding_table = shell_variables->table = global_variables->table = hash_create (VARIABLES_HASH_BUCKETS);
+ else
+ binding_table = shell_variables->table = hash_create (TEMPENV_HASH_BUCKETS);
}
- nlen = strlen (name);
- vlen = value ? strlen (value) : 0;
- temp = xmalloc (2 + nlen + vlen);
- strcpy (temp, name);
- temp[nlen] = '=';
- temp[nlen + 1] = '\0';
- if (value)
+ v = bind_variable_internal (var->name, value_cell (var), binding_table, 0, ASS_FORCE);
+
+ /* XXX - should we set the context here? It shouldn't matter because of how
+ assign_in_env works, but might want to check. */
+ if (binding_table == global_variables->table) /* XXX */
+ var->attributes &= ~(att_tempvar|att_propagate);
+ else
{
- if (*value)
- strcpy (temp + nlen + 1, value);
- free (value);
+ var->attributes |= att_propagate;
+ if (binding_table == shell_variables->table)
+ shell_variables->flags |= VC_HASTMPVAR;
}
- free (name);
+ if (v)
+ v->attributes |= var->attributes;
- if (temporary_env == 0)
+ if (find_special_var (var->name) >= 0)
+ tempvar_list[tvlist_ind++] = savestring (var->name);
+
+ dispose_variable (var);
+}
+
+static void
+propagate_temp_var (data)
+ PTR_T data;
+{
+ SHELL_VAR *var;
+
+ var = (SHELL_VAR *)data;
+ if (tempvar_p (var) && (var->attributes & att_propagate))
+ push_temp_var (data);
+ else
{
- temporary_env = (char **)xmalloc (sizeof (char *));
- temporary_env [0] = (char *)NULL;
+ if (find_special_var (var->name) >= 0)
+ tempvar_list[tvlist_ind++] = savestring (var->name);
+ dispose_variable (var);
}
+}
+
+/* Free the storage used in the hash table for temporary
+ environment variables. PUSHF is a function to be called
+ to free each hash table entry. It takes care of pushing variables
+ to previous scopes if appropriate. PUSHF stores names of variables
+ that require special handling (e.g., IFS) on tempvar_list, so this
+ function can call stupidly_hack_special_variables on all the
+ variables in the list when the temporary hash table is destroyed. */
+static void
+dispose_temporary_env (pushf)
+ sh_free_func_t *pushf;
+{
+ int i;
+
+ tempvar_list = strvec_create (HASH_ENTRIES (temporary_env) + 1);
+ tempvar_list[tvlist_ind = 0] = 0;
+
+ hash_flush (temporary_env, pushf);
+ hash_dispose (temporary_env);
+ temporary_env = (HASH_TABLE *)NULL;
- size = array_len (temporary_env);
- temporary_env = (char **)
- xrealloc (temporary_env, (size + 2) * (sizeof (char *)));
+ tempvar_list[tvlist_ind] = 0;
- temporary_env[size] = temp;
- temporary_env[size + 1] = (char *)NULL;
array_needs_making = 1;
- if (echo_command_at_execute)
+#if 0
+ sv_ifs ("IFS"); /* XXX here for now -- check setifs in assign_in_env */
+#endif
+ for (i = 0; i < tvlist_ind; i++)
+ stupidly_hack_special_variables (tempvar_list[i]);
+
+ strvec_dispose (tempvar_list);
+ tempvar_list = 0;
+ tvlist_ind = 0;
+}
+
+void
+dispose_used_env_vars ()
+{
+ if (temporary_env)
{
- /* The Korn shell prints the `+ ' in front of assignment statements,
- so we do too. */
- fprintf (stderr, "%s%s\n", indirection_level_string (), temp);
- fflush (stderr);
+ dispose_temporary_env (propagate_temp_var);
+ maybe_make_export_env ();
}
+}
- return 1;
+/* Take all of the shell variables in the temporary environment HASH_TABLE
+ and make shell variables from them at the current variable context. */
+void
+merge_temporary_env ()
+{
+ if (temporary_env)
+ dispose_temporary_env (push_temp_var);
}
-/* Search for NAME in ARRAY, an array of strings in the same format as the
- environment array (i.e, name=value). If NAME is present, make a new
- variable and return it. Otherwise, return NULL. */
-static SHELL_VAR *
-find_name_in_env_array (name, array)
- char *name;
- char **array;
+void
+flush_temporary_env ()
{
- register int i, l;
+ if (temporary_env)
+ {
+ hash_flush (temporary_env, free_variable_hash_data);
+ hash_dispose (temporary_env);
+ temporary_env = (HASH_TABLE *)NULL;
+ }
+}
- if (array == 0)
- return ((SHELL_VAR *)NULL);
+/* **************************************************************** */
+/* */
+/* Creating and manipulating the environment */
+/* */
+/* **************************************************************** */
+
+static inline char *
+mk_env_string (name, value, isfunc)
+ const char *name, *value;
+ int isfunc;
+{
+ size_t name_len, value_len;
+ char *p, *q;
+
+ name_len = strlen (name);
+ value_len = STRLEN (value);
+
+ /* If we are exporting a shell function, construct the encoded function
+ name. */
+ if (isfunc && value)
+ {
+ p = (char *)xmalloc (BASHFUNC_PREFLEN + name_len + BASHFUNC_SUFFLEN + value_len + 2);
+ q = p;
+ memcpy (q, BASHFUNC_PREFIX, BASHFUNC_PREFLEN);
+ q += BASHFUNC_PREFLEN;
+ memcpy (q, name, name_len);
+ q += name_len;
+ memcpy (q, BASHFUNC_SUFFIX, BASHFUNC_SUFFLEN);
+ q += BASHFUNC_SUFFLEN;
+ }
+ else
+ {
+ p = (char *)xmalloc (2 + name_len + value_len);
+ memcpy (p, name, name_len);
+ q = p + name_len;
+ }
+
+ q[0] = '=';
+ if (value && *value)
+ memcpy (q + 1, value, value_len + 1);
+ else
+ q[1] = '\0';
+
+ return (p);
+}
+
+#ifdef DEBUG
+/* Debugging */
+static int
+valid_exportstr (v)
+ SHELL_VAR *v;
+{
+ char *s;
+
+ s = v->exportstr;
+ if (s == 0)
+ {
+ internal_error (_("%s has null exportstr"), v->name);
+ return (0);
+ }
+ if (legal_variable_starter ((unsigned char)*s) == 0)
+ {
+ internal_error (_("invalid character %d in exportstr for %s"), *s, v->name);
+ return (0);
+ }
+ for (s = v->exportstr + 1; s && *s; s++)
+ {
+ if (*s == '=')
+ break;
+ if (legal_variable_char ((unsigned char)*s) == 0)
+ {
+ internal_error (_("invalid character %d in exportstr for %s"), *s, v->name);
+ return (0);
+ }
+ }
+ if (*s != '=')
+ {
+ internal_error (_("no `=' in exportstr for %s"), v->name);
+ return (0);
+ }
+ return (1);
+}
+#endif
+
+static char **
+make_env_array_from_var_list (vars)
+ SHELL_VAR **vars;
+{
+ register int i, list_index;
+ register SHELL_VAR *var;
+ char **list, *value;
+
+ list = strvec_create ((1 + strvec_len ((char **)vars)));
+
+#define USE_EXPORTSTR (value == var->exportstr)
+
+ for (i = 0, list_index = 0; var = vars[i]; i++)
+ {
+#if defined (__CYGWIN__)
+ /* We don't use the exportstr stuff on Cygwin at all. */
+ INVALIDATE_EXPORTSTR (var);
+#endif
+ if (var->exportstr)
+ value = var->exportstr;
+ else if (function_p (var))
+ value = named_function_string ((char *)NULL, function_cell (var), 0);
+#if defined (ARRAY_VARS)
+ else if (array_p (var))
+# if ARRAY_EXPORT
+ value = array_to_assign (array_cell (var), 0);
+# else
+ continue; /* XXX array vars cannot yet be exported */
+# endif /* ARRAY_EXPORT */
+ else if (assoc_p (var))
+# if 0
+ value = assoc_to_assign (assoc_cell (var), 0);
+# else
+ continue; /* XXX associative array vars cannot yet be exported */
+# endif
+#endif
+ else
+ value = value_cell (var);
- for (i = 0, l = strlen (name); array[i]; i++)
- {
- if (STREQN (array[i], name, l) && array[i][l] == '=')
+ if (value)
{
- SHELL_VAR *temp;
- char *w;
+ /* Gee, I'd like to get away with not using savestring() if we're
+ using the cached exportstr... */
+ list[list_index] = USE_EXPORTSTR ? savestring (value)
+ : mk_env_string (var->name, value, function_p (var));
- /* This is a potential memory leak. The code should really save
- the created variables in some auxiliary data structure, which
- can be disposed of at the appropriate time. */
- temp = new_shell_variable (name);
- w = array[i] + l + 1;
+ if (USE_EXPORTSTR == 0)
+ SAVE_EXPORTSTR (var, list[list_index]);
- temp->value = *w ? savestring (w) : (char *)NULL;
-
- temp->attributes = att_exported|att_tempvar;
- temp->context = 0;
- temp->prev_context = (SHELL_VAR *)NULL;
-
- temp->dynamic_value = temp->assign_func = (DYNAMIC_FUNC *)NULL;
+ list_index++;
+#undef USE_EXPORTSTR
- return (temp);
+#if 0 /* not yet */
+#if defined (ARRAY_VARS)
+ if (array_p (var) || assoc_p (var))
+ free (value);
+#endif
+#endif
}
}
- return ((SHELL_VAR *)NULL);
-}
-/* Find a variable in the temporary environment that is named NAME.
- The temporary environment can be either the environment provided
- to a simple command, or the environment provided to a shell function.
- We only search the function environment if we are currently executing
- a shell function body (variable_context > 0). Return a consed variable,
- or NULL if not found. */
-SHELL_VAR *
-find_tempenv_variable (name)
- char *name;
-{
- SHELL_VAR *var;
-
- var = (SHELL_VAR *)NULL;
-
- if (temporary_env)
- var = find_name_in_env_array (name, temporary_env);
-
- /* We don't check this_shell_builtin because the command that needs the
- value from builtin_env may be a disk command run inside a script run
- with `.' and a temporary env. */
- if (!var && builtin_env)
- var = find_name_in_env_array (name, builtin_env);
-
- if (!var && variable_context && function_env)
- var = find_name_in_env_array (name, function_env);
-
- return (var);
+ list[list_index] = (char *)NULL;
+ return (list);
}
-/* Free the storage allocated to the string array pointed to by ARRAYP, and
- make that variable have a null pointer as a value. */
-static void
-dispose_temporary_vars (arrayp)
- char ***arrayp;
+/* Make an array of assignment statements from the hash table
+ HASHED_VARS which contains SHELL_VARs. Only visible, exported
+ variables are eligible. */
+static char **
+make_var_export_array (vcxt)
+ VAR_CONTEXT *vcxt;
{
- if (!*arrayp)
- return;
+ char **list;
+ SHELL_VAR **vars;
- free_array (*arrayp);
- *arrayp = (char **)NULL;
- array_needs_making = 1;
-}
+#if 0
+ vars = map_over (visible_and_exported, vcxt);
+#else
+ vars = map_over (export_environment_candidate, vcxt);
+#endif
-/* Free the storage used in the variable array for temporary
- environment variables. */
-void
-dispose_used_env_vars ()
-{
- dispose_temporary_vars (&temporary_env);
-}
+ if (vars == 0)
+ return (char **)NULL;
-/* Free the storage used for temporary environment variables given to
- commands when executing inside of a function body. */
-void
-dispose_function_env ()
-{
- dispose_temporary_vars (&function_env);
-}
+ list = make_env_array_from_var_list (vars);
-/* Free the storage used for temporary environment variables given to
- commands when executing a builtin command such as "source". */
-void
-dispose_builtin_env ()
-{
- dispose_temporary_vars (&builtin_env);
+ free (vars);
+ return (list);
}
-/* Take all of the shell variables in ENV_ARRAY and make shell variables
- from them at the current variable context. */
-static void
-merge_env_array (env_array)
- char **env_array;
+static char **
+make_func_export_array ()
{
- register int i, l;
- SHELL_VAR *temp;
- char *val, *name;
-
- if (env_array == 0)
- return;
+ char **list;
+ SHELL_VAR **vars;
- for (i = 0; env_array[i]; i++)
- {
- l = assignment (env_array[i]);
- name = env_array[i];
- val = env_array[i] + l + 1;
- name[l] = '\0';
- temp = bind_variable (name, val);
- name[l] = '=';
- }
-}
+ vars = map_over_funcs (visible_and_exported);
+ if (vars == 0)
+ return (char **)NULL;
-void
-merge_temporary_env ()
-{
- merge_env_array (temporary_env);
-}
+ list = make_env_array_from_var_list (vars);
-void
-merge_builtin_env ()
-{
- merge_env_array (builtin_env);
+ free (vars);
+ return (list);
}
/* Add ENVSTR to the end of the exported environment, EXPORT_ENV. */
if (export_env_index >= (export_env_size - 1)) \
{ \
export_env_size += 16; \
- export_env = (char **)xrealloc (export_env, export_env_size * sizeof (char *)); \
+ export_env = strvec_resize (export_env, export_env_size); \
+ environ = export_env; \
} \
export_env[export_env_index++] = (do_alloc) ? savestring (envstr) : envstr; \
export_env[export_env_index] = (char *)NULL; \
} while (0)
-#define ISFUNCTION(s, o) ((s[o + 1] == '(') && (s[o + 2] == ')'))
-
/* Add ASSIGN to EXPORT_ENV, or supercede a previous assignment in the
array with the same left-hand side. Return the new EXPORT_ENV. */
char **
register int i;
int equal_offset;
- equal_offset = assignment (assign);
+ equal_offset = assignment (assign, 0);
if (equal_offset == 0)
return (export_env);
- /* If this is a function, then only supercede the function definition.
- We do this by including the `=(' in the comparison. */
- if (assign[equal_offset + 1] == '(')
- equal_offset++;
+ /* If this is a function, then only supersede the function definition.
+ We do this by including the `=() {' in the comparison, like
+ initialize_shell_variables does. */
+ if (assign[equal_offset + 1] == '(' &&
+ strncmp (assign + equal_offset + 2, ") {", 3) == 0) /* } */
+ equal_offset += 4;
for (i = 0; i < export_env_index; i++)
{
return (export_env);
}
+static void
+add_temp_array_to_env (temp_array, do_alloc, do_supercede)
+ char **temp_array;
+ int do_alloc, do_supercede;
+{
+ register int i;
+
+ if (temp_array == 0)
+ return;
+
+ for (i = 0; temp_array[i]; i++)
+ {
+ if (do_supercede)
+ export_env = add_or_supercede_exported_var (temp_array[i], do_alloc);
+ else
+ add_to_export_env (temp_array[i], do_alloc);
+ }
+
+ free (temp_array);
+}
+
/* Make the environment array for the command about to be executed, if the
array needs making. Otherwise, do nothing. If a shell action could
change the array that commands receive for their environment, then the
- code should `array_needs_making++'. */
+ code should `array_needs_making++'.
+
+ The order to add to the array is:
+ temporary_env
+ list of var contexts whose head is shell_variables
+ shell_functions
+
+ This is the shell variable lookup order. We add only new variable
+ names at each step, which allows local variables and variables in
+ the temporary environments to shadow variables in the global (or
+ any previous) scope.
+*/
+
+static int
+n_shell_variables ()
+{
+ VAR_CONTEXT *vc;
+ int n;
+
+ for (n = 0, vc = shell_variables; vc; vc = vc->down)
+ n += HASH_ENTRIES (vc->table);
+ return n;
+}
+
+int
+chkexport (name)
+ char *name;
+{
+ SHELL_VAR *v;
+
+ v = find_variable (name);
+ if (v && exported_p (v))
+ {
+ array_needs_making = 1;
+ maybe_make_export_env ();
+ return 1;
+ }
+ return 0;
+}
+
void
maybe_make_export_env ()
{
- register int i;
register char **temp_array;
int new_size;
+ VAR_CONTEXT *tcxt;
if (array_needs_making)
{
if (export_env)
- free_array_members (export_env);
+ strvec_flush (export_env);
/* Make a guess based on how many shell variables and functions we
have. Since there will always be array variables, and array
variables are not (yet) exported, this will always be big enough
- for the exported variables and functions, without any temporary
- or function environments. */
- new_size = shell_variables->nentries + shell_functions->nentries + 1;
+ for the exported variables and functions. */
+ new_size = n_shell_variables () + HASH_ENTRIES (shell_functions) + 1 +
+ HASH_ENTRIES (temporary_env);
if (new_size > export_env_size)
{
export_env_size = new_size;
- export_env = (char **)xrealloc (export_env, export_env_size * sizeof (char *));
+ export_env = strvec_resize (export_env, export_env_size);
+ environ = export_env;
}
export_env[export_env_index = 0] = (char *)NULL;
- temp_array = make_var_array (shell_variables);
- if (temp_array)
+ /* Make a dummy variable context from the temporary_env, stick it on
+ the front of shell_variables, call make_var_export_array on the
+ whole thing to flatten it, and convert the list of SHELL_VAR *s
+ to the form needed by the environment. */
+ if (temporary_env)
{
- for (i = 0; temp_array[i]; i++)
- add_to_export_env (temp_array[i], 0);
- free (temp_array);
+ tcxt = new_var_context ((char *)NULL, 0);
+ tcxt->table = temporary_env;
+ tcxt->down = shell_variables;
}
-
- temp_array = make_var_array (shell_functions);
+ else
+ tcxt = shell_variables;
+
+ temp_array = make_var_export_array (tcxt);
if (temp_array)
- {
- for (i = 0; temp_array[i]; i++)
- add_to_export_env (temp_array[i], 0);
- free (temp_array);
- }
+ add_temp_array_to_env (temp_array, 0, 0);
- if (function_env)
- for (i = 0; function_env[i]; i++)
- export_env = add_or_supercede_exported_var (function_env[i], 1);
+ if (tcxt != shell_variables)
+ free (tcxt);
- if (temporary_env)
- for (i = 0; temporary_env[i]; i++)
- export_env = add_or_supercede_exported_var (temporary_env[i], 1);
-
-#if 0
- /* If we changed the array, then sort it alphabetically. */
- if (posixly_correct == 0 && (temporary_env || function_env))
- sort_char_array (export_env);
+#if defined (RESTRICTED_SHELL)
+ /* Restricted shells may not export shell functions. */
+ temp_array = restricted ? (char **)0 : make_func_export_array ();
+#else
+ temp_array = make_func_export_array ();
#endif
+ if (temp_array)
+ add_temp_array_to_env (temp_array, 0, 0);
array_needs_making = 0;
}
}
+/* This is an efficiency hack. PWD and OLDPWD are auto-exported, so
+ we will need to remake the exported environment every time we
+ change directories. `_' is always put into the environment for
+ every external command, so without special treatment it will always
+ cause the environment to be remade.
+
+ If there is no other reason to make the exported environment, we can
+ just update the variables in place and mark the exported environment
+ as no longer needing a remake. */
+void
+update_export_env_inplace (env_prefix, preflen, value)
+ char *env_prefix;
+ int preflen;
+ char *value;
+{
+ char *evar;
+
+ evar = (char *)xmalloc (STRLEN (value) + preflen + 1);
+ strcpy (evar, env_prefix);
+ if (value)
+ strcpy (evar + preflen, value);
+ export_env = add_or_supercede_exported_var (evar, 0);
+}
+
/* We always put _ in the environment as the name of this command. */
void
put_command_name_into_env (command_name)
char *command_name;
{
- char *dummy;
+ update_export_env_inplace ("_=", 2, command_name);
+}
+
+/* **************************************************************** */
+/* */
+/* Managing variable contexts */
+/* */
+/* **************************************************************** */
+
+/* Allocate and return a new variable context with NAME and FLAGS.
+ NAME can be NULL. */
+
+VAR_CONTEXT *
+new_var_context (name, flags)
+ char *name;
+ int flags;
+{
+ VAR_CONTEXT *vc;
+
+ vc = (VAR_CONTEXT *)xmalloc (sizeof (VAR_CONTEXT));
+ vc->name = name ? savestring (name) : (char *)NULL;
+ vc->scope = variable_context;
+ vc->flags = flags;
+
+ vc->up = vc->down = (VAR_CONTEXT *)NULL;
+ vc->table = (HASH_TABLE *)NULL;
+
+ return vc;
+}
+
+/* Free a variable context and its data, including the hash table. Dispose
+ all of the variables. */
+void
+dispose_var_context (vc)
+ VAR_CONTEXT *vc;
+{
+ FREE (vc->name);
+
+ if (vc->table)
+ {
+ delete_all_variables (vc->table);
+ hash_dispose (vc->table);
+ }
+
+ free (vc);
+}
+
+/* Set VAR's scope level to the current variable context. */
+static int
+set_context (var)
+ SHELL_VAR *var;
+{
+ return (var->context = variable_context);
+}
+
+/* Make a new variable context with NAME and FLAGS and a HASH_TABLE of
+ temporary variables, and push it onto shell_variables. This is
+ for shell functions. */
+VAR_CONTEXT *
+push_var_context (name, flags, tempvars)
+ char *name;
+ int flags;
+ HASH_TABLE *tempvars;
+{
+ VAR_CONTEXT *vc;
+
+ vc = new_var_context (name, flags);
+ vc->table = tempvars;
+ if (tempvars)
+ {
+ /* Have to do this because the temp environment was created before
+ variable_context was incremented. */
+ flatten (tempvars, set_context, (VARLIST *)NULL, 0);
+ vc->flags |= VC_HASTMPVAR;
+ }
+ vc->down = shell_variables;
+ shell_variables->up = vc;
+
+ return (shell_variables = vc);
+}
+
+static void
+push_func_var (data)
+ PTR_T data;
+{
+ SHELL_VAR *var, *v;
+
+ var = (SHELL_VAR *)data;
- dummy = xmalloc (4 + strlen (command_name));
+ if (local_p (var) && STREQ (var->name, "-"))
+ set_current_options (value_cell (var));
+ else if (tempvar_p (var) && (posixly_correct || (var->attributes & att_propagate)))
+ {
+ /* Make sure we have a hash table to store the variable in while it is
+ being propagated down to the global variables table. Create one if
+ we have to */
+ if ((vc_isfuncenv (shell_variables) || vc_istempenv (shell_variables)) && shell_variables->table == 0)
+ shell_variables->table = hash_create (VARIABLES_HASH_BUCKETS);
+ /* XXX - should we set v->context here? */
+ v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0);
+#if defined (ARRAY_VARS)
+ if (array_p (var) || assoc_p (var))
+ {
+ FREE (value_cell (v));
+ if (array_p (var))
+ var_setarray (v, array_copy (array_cell (var)));
+ else
+ var_setassoc (v, assoc_copy (assoc_cell (var)));
+ }
+#endif
+ if (shell_variables == global_variables)
+ var->attributes &= ~(att_tempvar|att_propagate);
+ else
+ shell_variables->flags |= VC_HASTMPVAR;
+ if (v)
+ v->attributes |= var->attributes;
+ }
+ else
+ stupidly_hack_special_variables (var->name); /* XXX */
- /* These three statements replace a call to sprintf */
- dummy[0] = '_';
- dummy[1] = '=';
- strcpy (dummy + 2, command_name);
- export_env = add_or_supercede_exported_var (dummy, 0);
+ dispose_variable (var);
}
-#if 0 /* UNUSED -- it caused too many problems */
+/* Pop the top context off of VCXT and dispose of it, returning the rest of
+ the stack. */
void
-put_gnu_argv_flags_into_env (pid, flags_string)
- int pid;
- char *flags_string;
+pop_var_context ()
{
- char *dummy, *pbuf;
- int l, fl;
+ VAR_CONTEXT *ret, *vcxt;
+
+ vcxt = shell_variables;
+ if (vc_isfuncenv (vcxt) == 0)
+ {
+ internal_error (_("pop_var_context: head of shell_variables not a function context"));
+ return;
+ }
+
+ if (ret = vcxt->down)
+ {
+ ret->up = (VAR_CONTEXT *)NULL;
+ shell_variables = ret;
+ if (vcxt->table)
+ hash_flush (vcxt->table, push_func_var);
+ dispose_var_context (vcxt);
+ }
+ else
+ internal_error (_("pop_var_context: no global_variables context"));
+}
- pbuf = itos (pid);
- l = strlen (pbuf);
+/* Delete the HASH_TABLEs for all variable contexts beginning at VCXT, and
+ all of the VAR_CONTEXTs except GLOBAL_VARIABLES. */
+void
+delete_all_contexts (vcxt)
+ VAR_CONTEXT *vcxt;
+{
+ VAR_CONTEXT *v, *t;
- fl = strlen (flags_string);
+ for (v = vcxt; v != global_variables; v = t)
+ {
+ t = v->down;
+ dispose_var_context (v);
+ }
- dummy = xmalloc (l + fl + 30);
- dummy[0] = '_';
- strcpy (dummy + 1, pbuf);
- strcpy (dummy + 1 + l, "_GNU_nonoption_argv_flags_");
- dummy[l + 27] = '=';
- strcpy (dummy + l + 28, flags_string);
+ delete_all_variables (global_variables->table);
+ shell_variables = global_variables;
+}
- free (pbuf);
+/* **************************************************************** */
+/* */
+/* Pushing and Popping temporary variable scopes */
+/* */
+/* **************************************************************** */
- export_env = add_or_supercede_exported_var (dummy, 0);
+VAR_CONTEXT *
+push_scope (flags, tmpvars)
+ int flags;
+ HASH_TABLE *tmpvars;
+{
+ return (push_var_context ((char *)NULL, flags, tmpvars));
}
+
+static void
+push_exported_var (data)
+ PTR_T data;
+{
+ SHELL_VAR *var, *v;
+
+ var = (SHELL_VAR *)data;
+
+ /* If a temp var had its export attribute set, or it's marked to be
+ propagated, bind it in the previous scope before disposing it. */
+ /* XXX - This isn't exactly right, because all tempenv variables have the
+ export attribute set. */
+#if 0
+ if (exported_p (var) || (var->attributes & att_propagate))
+#else
+ if (tempvar_p (var) && exported_p (var) && (var->attributes & att_propagate))
#endif
+ {
+ var->attributes &= ~att_tempvar; /* XXX */
+ v = bind_variable_internal (var->name, value_cell (var), shell_variables->table, 0, 0);
+ if (shell_variables == global_variables)
+ var->attributes &= ~att_propagate;
+ if (v)
+ v->attributes |= var->attributes;
+ }
+ else
+ stupidly_hack_special_variables (var->name); /* XXX */
-/* Return a string denoting what our indirection level is. */
-static char indirection_string[100];
+ dispose_variable (var);
+}
-char *
-indirection_level_string ()
+void
+pop_scope (is_special)
+ int is_special;
+{
+ VAR_CONTEXT *vcxt, *ret;
+
+ vcxt = shell_variables;
+ if (vc_istempscope (vcxt) == 0)
+ {
+ internal_error (_("pop_scope: head of shell_variables not a temporary environment scope"));
+ return;
+ }
+
+ ret = vcxt->down;
+ if (ret)
+ ret->up = (VAR_CONTEXT *)NULL;
+
+ shell_variables = ret;
+
+ /* Now we can take care of merging variables in VCXT into set of scopes
+ whose head is RET (shell_variables). */
+ FREE (vcxt->name);
+ if (vcxt->table)
+ {
+ if (is_special)
+ hash_flush (vcxt->table, push_func_var);
+ else
+ hash_flush (vcxt->table, push_exported_var);
+ hash_dispose (vcxt->table);
+ }
+ free (vcxt);
+
+ sv_ifs ("IFS"); /* XXX here for now */
+}
+
+/* **************************************************************** */
+/* */
+/* Pushing and Popping function contexts */
+/* */
+/* **************************************************************** */
+
+static WORD_LIST **dollar_arg_stack = (WORD_LIST **)NULL;
+static int dollar_arg_stack_slots;
+static int dollar_arg_stack_index;
+
+/* XXX - should always be followed by remember_args () */
+void
+push_context (name, is_subshell, tempvars)
+ char *name; /* function name */
+ int is_subshell;
+ HASH_TABLE *tempvars;
+{
+ if (is_subshell == 0)
+ push_dollar_vars ();
+ variable_context++;
+ push_var_context (name, VC_FUNCENV, tempvars);
+}
+
+/* Only called when subshell == 0, so we don't need to check, and can
+ unconditionally pop the dollar vars off the stack. */
+void
+pop_context ()
+{
+ pop_dollar_vars ();
+ variable_context--;
+ pop_var_context ();
+
+ sv_ifs ("IFS"); /* XXX here for now */
+}
+
+/* Save the existing positional parameters on a stack. */
+void
+push_dollar_vars ()
+{
+ if (dollar_arg_stack_index + 2 > dollar_arg_stack_slots)
+ {
+ dollar_arg_stack = (WORD_LIST **)
+ xrealloc (dollar_arg_stack, (dollar_arg_stack_slots += 10)
+ * sizeof (WORD_LIST *));
+ }
+ dollar_arg_stack[dollar_arg_stack_index++] = list_rest_of_args ();
+ dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
+}
+
+/* Restore the positional parameters from our stack. */
+void
+pop_dollar_vars ()
{
- register int i, j;
- char *ps4;
+ if (!dollar_arg_stack || dollar_arg_stack_index == 0)
+ return;
+
+ remember_args (dollar_arg_stack[--dollar_arg_stack_index], 1);
+ dispose_words (dollar_arg_stack[dollar_arg_stack_index]);
+ dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
+ set_dollar_vars_unchanged ();
+}
+
+void
+dispose_saved_dollar_vars ()
+{
+ if (!dollar_arg_stack || dollar_arg_stack_index == 0)
+ return;
+
+ dispose_words (dollar_arg_stack[dollar_arg_stack_index]);
+ dollar_arg_stack[dollar_arg_stack_index] = (WORD_LIST *)NULL;
+}
- indirection_string[0] = '\0';
- ps4 = get_string_value ("PS4");
+/* Manipulate the special BASH_ARGV and BASH_ARGC variables. */
- if (ps4 == 0 || *ps4 == '\0')
- return (indirection_string);
+void
+push_args (list)
+ WORD_LIST *list;
+{
+#if defined (ARRAY_VARS) && defined (DEBUGGER)
+ SHELL_VAR *bash_argv_v, *bash_argc_v;
+ ARRAY *bash_argv_a, *bash_argc_a;
+ WORD_LIST *l;
+ arrayind_t i;
+ char *t;
- ps4 = decode_prompt_string (ps4);
+ GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a);
+ GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a);
- for (i = 0; *ps4 && i < indirection_level && i < 99; i++)
- indirection_string[i] = *ps4;
+ for (l = list, i = 0; l; l = l->next, i++)
+ array_push (bash_argv_a, l->word->word);
- for (j = 1; *ps4 && ps4[j] && i < 99; i++, j++)
- indirection_string[i] = ps4[j];
+ t = itos (i);
+ array_push (bash_argc_a, t);
+ free (t);
+#endif /* ARRAY_VARS && DEBUGGER */
+}
- indirection_string[i] = '\0';
- free (ps4);
- return (indirection_string);
+/* Remove arguments from BASH_ARGV array. Pop top element off BASH_ARGC
+ array and use that value as the count of elements to remove from
+ BASH_ARGV. */
+void
+pop_args ()
+{
+#if defined (ARRAY_VARS) && defined (DEBUGGER)
+ SHELL_VAR *bash_argv_v, *bash_argc_v;
+ ARRAY *bash_argv_a, *bash_argc_a;
+ ARRAY_ELEMENT *ce;
+ intmax_t i;
+
+ GET_ARRAY_FROM_VAR ("BASH_ARGV", bash_argv_v, bash_argv_a);
+ GET_ARRAY_FROM_VAR ("BASH_ARGC", bash_argc_v, bash_argc_a);
+
+ ce = array_shift (bash_argc_a, 1, 0);
+ if (ce == 0 || legal_number (element_value (ce), &i) == 0)
+ i = 0;
+
+ for ( ; i > 0; i--)
+ array_pop (bash_argv_a);
+ array_dispose_element (ce);
+#endif /* ARRAY_VARS && DEBUGGER */
}
/*************************************************
extern int eof_encountered, eof_encountered_limit, ignoreeof;
#if defined (READLINE)
-extern int no_line_editing;
extern int hostname_list_initialized;
#endif
#define SET_INT_VAR(name, intvar) intvar = find_variable (name) != 0
+/* This table will be sorted with qsort() the first time it's accessed. */
struct name_and_function {
char *name;
- VFunction *function;
-} special_vars[] = {
- { "PATH", sv_path },
- { "MAIL", sv_mail },
- { "MAILPATH", sv_mail },
- { "MAILCHECK", sv_mail },
+ sh_sv_func_t *function;
+};
- { "POSIXLY_CORRECT", sv_strict_posix },
- { "GLOBIGNORE", sv_globignore },
+static struct name_and_function special_vars[] = {
+ { "BASH_COMPAT", sv_shcompat },
+ { "BASH_XTRACEFD", sv_xtracefd },
+
+#if defined (JOB_CONTROL)
+ { "CHILD_MAX", sv_childmax },
+#endif
- /* Variables which only do something special when READLINE is defined. */
#if defined (READLINE)
- { "TERM", sv_terminal },
- { "TERMCAP", sv_terminal },
- { "TERMINFO", sv_terminal },
- { "HOSTFILE", sv_hostfile },
-#endif /* READLINE */
+# if defined (STRICT_POSIX)
+ { "COLUMNS", sv_winsize },
+# endif
+ { "COMP_WORDBREAKS", sv_comp_wordbreaks },
+#endif
+
+ { "EXECIGNORE", sv_execignore },
+
+ { "FUNCNEST", sv_funcnest },
+
+ { "GLOBIGNORE", sv_globignore },
- /* Variables which only do something special when HISTORY is defined. */
#if defined (HISTORY)
+ { "HISTCONTROL", sv_history_control },
+ { "HISTFILESIZE", sv_histsize },
{ "HISTIGNORE", sv_histignore },
{ "HISTSIZE", sv_histsize },
- { "HISTFILESIZE", sv_histsize },
- { "HISTCONTROL", sv_history_control },
-# if defined (BANG_HISTORY)
- { "histchars", sv_histchars },
-# endif /* BANG_HISTORY */
-#endif /* HISTORY */
+ { "HISTTIMEFORMAT", sv_histtimefmt },
+#endif
- { "IGNOREEOF", sv_ignoreeof },
- { "ignoreeof", sv_ignoreeof },
+#if defined (__CYGWIN__)
+ { "HOME", sv_home },
+#endif
- { "OPTIND", sv_optind },
- { "OPTERR", sv_opterr },
+#if defined (READLINE)
+ { "HOSTFILE", sv_hostfile },
+#endif
- { "TEXTDOMAIN", sv_locale },
- { "TEXTDOMAINDIR", sv_locale },
+ { "IFS", sv_ifs },
+ { "IGNOREEOF", sv_ignoreeof },
+
+ { "LANG", sv_locale },
{ "LC_ALL", sv_locale },
{ "LC_COLLATE", sv_locale },
{ "LC_CTYPE", sv_locale },
{ "LC_MESSAGES", sv_locale },
- { "LANG", sv_locale },
+ { "LC_NUMERIC", sv_locale },
+ { "LC_TIME", sv_locale },
+
+#if defined (READLINE) && defined (STRICT_POSIX)
+ { "LINES", sv_winsize },
+#endif
+
+ { "MAIL", sv_mail },
+ { "MAILCHECK", sv_mail },
+ { "MAILPATH", sv_mail },
+
+ { "OPTERR", sv_opterr },
+ { "OPTIND", sv_optind },
+
+ { "PATH", sv_path },
+ { "POSIXLY_CORRECT", sv_strict_posix },
+
+#if defined (READLINE)
+ { "TERM", sv_terminal },
+ { "TERMCAP", sv_terminal },
+ { "TERMINFO", sv_terminal },
+#endif /* READLINE */
+
+ { "TEXTDOMAIN", sv_locale },
+ { "TEXTDOMAINDIR", sv_locale },
-#if defined (HAVE_TZSET) && defined (PROMPT_STRING_DECODE)
+#if defined (HAVE_TZSET)
{ "TZ", sv_tz },
#endif
- { (char *)0, (VFunction *)0 }
+#if defined (HISTORY) && defined (BANG_HISTORY)
+ { "histchars", sv_histchars },
+#endif /* HISTORY && BANG_HISTORY */
+
+ { "ignoreeof", sv_ignoreeof },
+
+ { (char *)0, (sh_sv_func_t *)0 }
};
+#define N_SPECIAL_VARS (sizeof (special_vars) / sizeof (special_vars[0]) - 1)
+
+static int
+sv_compare (sv1, sv2)
+ struct name_and_function *sv1, *sv2;
+{
+ int r;
+
+ if ((r = sv1->name[0] - sv2->name[0]) == 0)
+ r = strcmp (sv1->name, sv2->name);
+ return r;
+}
+
+static inline int
+find_special_var (name)
+ const char *name;
+{
+ register int i, r;
+
+ for (i = 0; special_vars[i].name; i++)
+ {
+ r = special_vars[i].name[0] - name[0];
+ if (r == 0)
+ r = strcmp (special_vars[i].name, name);
+ if (r == 0)
+ return i;
+ else if (r > 0)
+ /* Can't match any of rest of elements in sorted list. Take this out
+ if it causes problems in certain environments. */
+ break;
+ }
+ return -1;
+}
+
/* The variable in NAME has just had its state changed. Check to see if it
is one of the special ones where something special happens. */
void
stupidly_hack_special_variables (name)
char *name;
{
+ static int sv_sorted = 0;
int i;
- for (i = 0; special_vars[i].name; i++)
+ if (sv_sorted == 0) /* shouldn't need, but it's fairly cheap. */
{
- if (STREQ (special_vars[i].name, name))
- {
- (*(special_vars[i].function)) (name);
- return;
- }
+ qsort (special_vars, N_SPECIAL_VARS, sizeof (special_vars[0]),
+ (QSFUNC *)sv_compare);
+ sv_sorted = 1;
}
+
+ i = find_special_var (name);
+ if (i != -1)
+ (*(special_vars[i].function)) (name);
+}
+
+/* Special variables that need hooks to be run when they are unset as part
+ of shell reinitialization should have their sv_ functions run here. */
+void
+reinit_special_variables ()
+{
+#if defined (READLINE)
+ sv_comp_wordbreaks ("COMP_WORDBREAKS");
+#endif
+ sv_globignore ("GLOBIGNORE");
+ sv_opterr ("OPTERR");
+}
+
+void
+sv_ifs (name)
+ char *name;
+{
+ SHELL_VAR *v;
+
+ v = find_variable ("IFS");
+ setifs (v);
}
/* What to do just after the PATH variable has changed. */
char *name;
{
/* hash -r */
- flush_hashed_filenames ();
+ phash_flush ();
}
/* What to do just after one of the MAILxxxx variables has changed. NAME
}
}
+void
+sv_funcnest (name)
+ char *name;
+{
+ SHELL_VAR *v;
+ intmax_t num;
+
+ v = find_variable (name);
+ if (v == 0)
+ funcnest_max = 0;
+ else if (legal_number (value_cell (v), &num) == 0)
+ funcnest_max = 0;
+ else
+ funcnest_max = num;
+}
+
+/* What to do when EXECIGNORE changes. */
+void
+sv_execignore (name)
+ char *name;
+{
+ setup_exec_ignore (name);
+}
+
/* What to do when GLOBIGNORE changes. */
void
sv_globignore (name)
char *name;
{
- setup_glob_ignore (name);
+ if (privileged_mode == 0)
+ setup_glob_ignore (name);
}
#if defined (READLINE)
+void
+sv_comp_wordbreaks (name)
+ char *name;
+{
+ SHELL_VAR *sv;
+
+ sv = find_variable (name);
+ if (sv == 0)
+ reset_completer_word_break_chars ();
+}
+
/* What to do just after one of the TERMxxx variables has changed.
If we are an interactive shell, then try to reset the terminal
information in readline. */
sv_hostfile (name)
char *name;
{
- hostname_list_initialized = 0;
+ SHELL_VAR *v;
+
+ v = find_variable (name);
+ if (v == 0)
+ clear_hostname_list ();
+ else
+ hostname_list_initialized = 0;
+}
+
+#if defined (STRICT_POSIX)
+/* In strict posix mode, we allow assignments to LINES and COLUMNS (and values
+ found in the initial environment) to override the terminal size reported by
+ the kernel. */
+void
+sv_winsize (name)
+ char *name;
+{
+ SHELL_VAR *v;
+ intmax_t xd;
+ int d;
+
+ if (posixly_correct == 0 || interactive_shell == 0 || no_line_editing)
+ return;
+
+ v = find_variable (name);
+ if (v == 0 || var_isset (v) == 0)
+ rl_reset_screen_size ();
+ else
+ {
+ if (legal_number (value_cell (v), &xd) == 0)
+ return;
+ winsize_assignment = 1;
+ d = xd; /* truncate */
+ if (name[0] == 'L') /* LINES */
+ rl_set_screen_size (d, -1);
+ else /* COLUMNS */
+ rl_set_screen_size (-1, d);
+ winsize_assignment = 0;
+ }
}
+#endif /* STRICT_POSIX */
#endif /* READLINE */
+/* Update the value of HOME in the export environment so tilde expansion will
+ work on cygwin. */
+#if defined (__CYGWIN__)
+sv_home (name)
+ char *name;
+{
+ array_needs_making = 1;
+ maybe_make_export_env ();
+}
+#endif
+
#if defined (HISTORY)
/* What to do after the HISTSIZE or HISTFILESIZE variables change.
If there is a value for this HISTSIZE (and it is numeric), then stifle
char *name;
{
char *temp;
- long num;
+ intmax_t num;
+ int hmax;
temp = get_string_value (name);
if (temp && *temp)
{
if (legal_number (temp, &num))
- {
- if (name[4] == 'S')
+ {
+ hmax = num;
+ if (hmax < 0 && name[4] == 'S')
+ unstifle_history (); /* unstifle history if HISTSIZE < 0 */
+ else if (name[4] == 'S')
{
- stifle_history (num);
- num = where_history ();
- if (history_lines_this_session > num)
- history_lines_this_session = num;
+ stifle_history (hmax);
+ hmax = where_history ();
+ if (history_lines_this_session > hmax)
+ history_lines_this_session = hmax;
}
- else
+ else if (hmax >= 0) /* truncate HISTFILE if HISTFILESIZE >= 0 */
{
- history_truncate_file (get_string_value ("HISTFILE"), (int)num);
- if (num <= history_lines_in_file)
- history_lines_in_file = num;
+ history_truncate_file (get_string_value ("HISTFILE"), hmax);
+ /* If we just shrank the history file to fewer lines than we've
+ already read, make sure we adjust our idea of how many lines
+ we have read from the file. */
+ if (hmax < history_lines_in_file)
+ history_lines_in_file = hmax;
}
}
}
char *name;
{
char *temp;
+ char *val;
+ int tptr;
history_control = 0;
temp = get_string_value (name);
- if (temp && *temp && STREQN (temp, "ignore", 6))
+ if (temp == 0 || *temp == 0)
+ return;
+
+ tptr = 0;
+ while (val = extract_colon_unit (temp, &tptr))
{
- if (temp[6] == 's') /* ignorespace */
- history_control = 1;
- else if (temp[6] == 'd') /* ignoredups */
- history_control = 2;
- else if (temp[6] == 'b') /* ignoreboth */
- history_control = 3;
+ if (STREQ (val, "ignorespace"))
+ history_control |= HC_IGNSPACE;
+ else if (STREQ (val, "ignoredups"))
+ history_control |= HC_IGNDUPS;
+ else if (STREQ (val, "ignoreboth"))
+ history_control |= HC_IGNBOTH;
+ else if (STREQ (val, "erasedups"))
+ history_control |= HC_ERASEDUPS;
+
+ free (val);
}
}
}
}
#endif /* BANG_HISTORY */
+
+void
+sv_histtimefmt (name)
+ char *name;
+{
+ SHELL_VAR *v;
+
+ if (v = find_variable (name))
+ {
+ if (history_comment_char == 0)
+ history_comment_char = '#';
+ }
+ history_write_timestamps = (v != 0);
+}
#endif /* HISTORY */
-#if defined (HAVE_TZSET) && defined (PROMPT_STRING_DECODE)
+#if defined (HAVE_TZSET)
void
sv_tz (name)
char *name;
{
- tzset ();
+ if (chkexport (name))
+ tzset ();
}
#endif
eof_encountered = 0;
tmp_var = find_variable (name);
- ignoreeof = tmp_var != 0;
+ ignoreeof = tmp_var && var_isset (tmp_var);
temp = tmp_var ? value_cell (tmp_var) : (char *)NULL;
if (temp)
eof_encountered_limit = (*temp && all_digits (temp)) ? atoi (temp) : 10;
sv_optind (name)
char *name;
{
+ SHELL_VAR *var;
char *tt;
int s;
- tt = get_string_value ("OPTIND");
+ var = find_variable ("OPTIND");
+ tt = var ? get_variable_value (var) : (char *)NULL;
+
+ /* Assume that if var->context < variable_context and variable_context > 0
+ then we are restoring the variables's previous state while returning
+ from a function. */
if (tt && *tt)
{
s = atoi (tt);
sv_strict_posix (name)
char *name;
{
- SET_INT_VAR (name, posixly_correct);
+ SHELL_VAR *var;
+
+ var = find_variable (name);
+ posixly_correct = var && var_isset (var);
posix_initialize (posixly_correct);
#if defined (READLINE)
if (interactive_shell)
char *name;
{
char *v;
+ int r;
v = get_string_value (name);
if (name[0] == 'L' && name[1] == 'A') /* LANG */
- set_lang (name, v);
+ r = set_lang (name, v);
else
- set_locale_var (name, v); /* LC_*, TEXTDOMAIN* */
+ r = set_locale_var (name, v); /* LC_*, TEXTDOMAIN* */
+
+#if 1
+ if (r == 0 && posixly_correct)
+ last_command_exit_value = 1;
+#endif
}
#if defined (ARRAY_VARS)
void
-set_pipestatus_array (ps)
+set_pipestatus_array (ps, nproc)
int *ps;
+ int nproc;
{
SHELL_VAR *v;
ARRAY *a;
+ ARRAY_ELEMENT *ae;
register int i;
- char *t;
+ char *t, tbuf[INT_STRLEN_BOUND(int) + 1];
v = find_variable ("PIPESTATUS");
if (v == 0)
if (array_p (v) == 0)
return; /* Do nothing if not an array variable. */
a = array_cell (v);
- if (a)
- empty_array (a);
- for (i = 0; ps[i] != -1; i++)
+
+ if (a == 0 || array_num_elements (a) == 0)
{
- t = itos (ps[i]);
- array_add_element (a, i, t);
- free (t);
+ for (i = 0; i < nproc; i++) /* was ps[i] != -1, not i < nproc */
+ {
+ t = inttostr (ps[i], tbuf, sizeof (tbuf));
+ array_insert (a, i, t);
+ }
+ return;
+ }
+
+ /* Fast case */
+ if (array_num_elements (a) == nproc && nproc == 1)
+ {
+ ae = element_forw (a->head);
+ free (element_value (ae));
+ ae->value = itos (ps[0]);
+ }
+ else if (array_num_elements (a) <= nproc)
+ {
+ /* modify in array_num_elements members in place, then add */
+ ae = a->head;
+ for (i = 0; i < array_num_elements (a); i++)
+ {
+ ae = element_forw (ae);
+ free (element_value (ae));
+ ae->value = itos (ps[i]);
+ }
+ /* add any more */
+ for ( ; i < nproc; i++)
+ {
+ t = inttostr (ps[i], tbuf, sizeof (tbuf));
+ array_insert (a, i, t);
+ }
+ }
+ else
+ {
+ /* deleting elements. it's faster to rebuild the array. */
+ array_flush (a);
+ for (i = 0; ps[i] != -1; i++)
+ {
+ t = inttostr (ps[i], tbuf, sizeof (tbuf));
+ array_insert (a, i, t);
+ }
}
}
+
+ARRAY *
+save_pipestatus_array ()
+{
+ SHELL_VAR *v;
+ ARRAY *a, *a2;
+
+ v = find_variable ("PIPESTATUS");
+ if (v == 0 || array_p (v) == 0 || array_cell (v) == 0)
+ return ((ARRAY *)NULL);
+
+ a = array_cell (v);
+ a2 = array_copy (array_cell (v));
+
+ return a2;
+}
+
+void
+restore_pipestatus_array (a)
+ ARRAY *a;
+{
+ SHELL_VAR *v;
+ ARRAY *a2;
+
+ v = find_variable ("PIPESTATUS");
+ /* XXX - should we still assign even if existing value is NULL? */
+ if (v == 0 || array_p (v) == 0 || array_cell (v) == 0)
+ return;
+
+ a2 = array_cell (v);
+ var_setarray (v, a);
+
+ array_dispose (a2);
+}
#endif
void
static int v[2] = { 0, -1 };
v[0] = s;
- set_pipestatus_array (v);
+ set_pipestatus_array (v, 1);
#endif
}
+
+void
+sv_xtracefd (name)
+ char *name;
+{
+ SHELL_VAR *v;
+ char *t, *e;
+ int fd;
+ FILE *fp;
+
+ v = find_variable (name);
+ if (v == 0)
+ {
+ xtrace_reset ();
+ return;
+ }
+
+ t = value_cell (v);
+ if (t == 0 || *t == 0)
+ xtrace_reset ();
+ else
+ {
+ fd = (int)strtol (t, &e, 10);
+ if (e != t && *e == '\0' && sh_validfd (fd))
+ {
+ fp = fdopen (fd, "w");
+ if (fp == 0)
+ internal_error (_("%s: %s: cannot open as FILE"), name, value_cell (v));
+ else
+ xtrace_set (fd, fp);
+ }
+ else
+ internal_error (_("%s: %s: invalid value for trace file descriptor"), name, value_cell (v));
+ }
+}
+
+#define MIN_COMPAT_LEVEL 31
+
+void
+sv_shcompat (name)
+ char *name;
+{
+ SHELL_VAR *v;
+ char *val;
+ int tens, ones, compatval;
+
+ v = find_variable (name);
+ if (v == 0)
+ {
+ shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
+ set_compatibility_opts ();
+ return;
+ }
+ val = value_cell (v);
+ if (val == 0 || *val == '\0')
+ {
+ shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
+ set_compatibility_opts ();
+ return;
+ }
+ /* Handle decimal-like compatibility version specifications: 4.2 */
+ if (ISDIGIT (val[0]) && val[1] == '.' && ISDIGIT (val[2]) && val[3] == 0)
+ {
+ tens = val[0] - '0';
+ ones = val[2] - '0';
+ compatval = tens*10 + ones;
+ }
+ /* Handle integer-like compatibility version specifications: 42 */
+ else if (ISDIGIT (val[0]) && ISDIGIT (val[1]) && val[2] == 0)
+ {
+ tens = val[0] - '0';
+ ones = val[1] - '0';
+ compatval = tens*10 + ones;
+ }
+ else
+ {
+compat_error:
+ internal_error (_("%s: %s: compatibility value out of range"), name, val);
+ shell_compatibility_level = DEFAULT_COMPAT_LEVEL;
+ set_compatibility_opts ();
+ return;
+ }
+
+ if (compatval < MIN_COMPAT_LEVEL || compatval > DEFAULT_COMPAT_LEVEL)
+ goto compat_error;
+
+ shell_compatibility_level = compatval;
+ set_compatibility_opts ();
+}
+
+#if defined (JOB_CONTROL)
+void
+sv_childmax (name)
+ char *name;
+{
+ char *tt;
+ int s;
+
+ tt = get_string_value (name);
+ s = (tt && *tt) ? atoi (tt) : 0;
+ set_maxchild (s);
+}
+#endif
projects / thirdparty / bash.git / blobdiff