-/* shell.c -- GNU's idea of the POSIX shell specification.
+/* shell.c -- GNU's idea of the POSIX shell specification. */
- This file is part of Bash, the Bourne Again SHell. Bash is free
- software; no one can prevent you from reading the source code, or
- giving it to someone else. This file is copyrighted under the GNU
- General Public License, which can be found in the file called
- COPYING.
+/* Copyright (C) 1987-2021 Free Software Foundation, Inc.
- Copyright (C) 1988, 1991 Free Software Foundation, Inc.
+ This file is part of GNU Bash, the Bourne Again SHell.
- This file is part of GNU Bash.
+ 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. No author or distributor accepts responsibility to
- anyone for the consequences of using it or for whether it serves
- any particular purpose or works at all, unless he says so in
- writing. Refer to the GNU Emacs General Public License for full
- 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.
- Everyone is granted permission to copy, modify and redistribute
- Bash, but only under the conditions described in the GNU General
- Public License. A copy of this license is supposed to have been
- given to you along with GNU Emacs so you can know your rights and
- responsibilities. It should be in a file named COPYING.
-
- Among other things, the copyright notice and this notice must be
- preserved on all copies.
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
Birthdate:
Sunday, January 10th, 1988.
Initial author: Brian Fox
*/
#define INSTALL_DEBUG_MODE
+#include "config.h"
+
#include "bashtypes.h"
+#if !defined (_MINIX) && defined (HAVE_SYS_FILE_H)
+# include <sys/file.h>
+#endif
+#include "posixstat.h"
+#include "posixtime.h"
+#include "bashansi.h"
#include <stdio.h>
#include <signal.h>
#include <errno.h>
-#include <sys/file.h>
#include "filecntl.h"
-#include <pwd.h>
-#include "posixstat.h"
-#include "bashansi.h"
+#if defined (HAVE_PWD_H)
+# include <pwd.h>
+#endif
-#if defined (HAVE_VARARGS_H)
-#include <varargs.h>
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
#endif
+#include "bashintl.h"
+
+#define NEED_SH_SETLINEBUF_DECL /* used in externs.h */
+
#include "shell.h"
+#include "parser.h"
#include "flags.h"
+#include "trap.h"
+#include "mailcheck.h"
+#include "builtins.h"
+#include "builtins/common.h"
#if defined (JOB_CONTROL)
#include "jobs.h"
+#else
+extern int running_in_background;
+extern int initialize_job_control PARAMS((int));
+extern int get_tty_state PARAMS((void));
#endif /* JOB_CONTROL */
#include "input.h"
#include "execute_cmd.h"
+#include "findcmd.h"
+
+#if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS)
+# include <malloc/shmalloc.h>
+#elif defined (MALLOC_DEBUG) && defined (USING_BASH_MALLOC)
+# include <malloc/shmalloc.h>
+#endif
#if defined (HISTORY)
# include "bashhist.h"
# include <readline/history.h>
#endif
+#if defined (READLINE)
+# include <readline/readline.h>
+# include "bashline.h"
+#endif
+
#include <tilde/tilde.h>
+#include <glob/strmatch.h>
+
+#if defined (__OPENNT)
+# include <opennt/opennt.h>
+#endif
-#if defined (USG) && !defined (HAVE_GETPW_DECLS)
+#if !defined (HAVE_GETPW_DECLS)
extern struct passwd *getpwuid ();
-#endif /* USG && !HAVE_GETPW_DECLS */
+#endif /* !HAVE_GETPW_DECLS */
-extern int yydebug;
#if !defined (errno)
extern int errno;
#endif
-extern char *dist_version;
-extern int patch_level, build_version;
-extern int subshell_environment; /* Found in execute_cmd.c. */
-extern int last_command_exit_value;
-extern int return_catch_flag;
-extern jmp_buf return_catch;
-extern int need_here_doc, current_command_line_count, line_number;
-extern char *ps1_prompt, **prompt_string_pointer;
-extern int loop_level, continuing, breaking;
-extern int parse_and_execute_level;
-extern char *this_command_name;
-
-/* Non-zero means that this shell has already been run; i.e. you should
- call shell_reinitialize () if you need to start afresh. */
-static int shell_initialized = 0;
-static int sourced_env = 0;
-
-/* The current maintainer of the shell. You change this in the
- Makefile. */
-#if !defined (MAINTAINER)
-#define MAINTAINER "bash-maintainers@prep.ai.mit.edu"
+#if defined (NO_MAIN_ENV_ARG)
+extern char **environ; /* used if no third argument to main() */
#endif
-char *the_current_maintainer = MAINTAINER;
+extern int gnu_error_format;
-char *primary_prompt = PPROMPT;
-char *secondary_prompt = SPROMPT;
+/* Non-zero means that this shell has already been run; i.e. you should
+ call shell_reinitialize () if you need to start afresh. */
+int shell_initialized = 0;
+int bash_argv_initialized = 0;
COMMAND *global_command = (COMMAND *)NULL;
-/* Non-zero after SIGINT. */
-int interrupt_state = 0;
-
/* Information about the current user. */
struct user_info current_user =
{
- -1, -1, -1, -1, (char *)NULL, (char *)NULL, (char *)NULL
+ (uid_t)-1, (uid_t)-1, (gid_t)-1, (gid_t)-1,
+ (char *)NULL, (char *)NULL, (char *)NULL
};
/* The current host's name. */
Specifically:
0 = not login shell.
1 = login shell from getty (or equivalent fake out)
- -1 = login shell from "-login" flag.
+ -1 = login shell from "--login" (or -l) flag.
-2 = both from getty, and from flag.
*/
int login_shell = 0;
/* Non-zero means that the shell was started as an interactive shell. */
int interactive_shell = 0;
+/* Non-zero means to send a SIGHUP to all jobs when an interactive login
+ shell exits. */
+int hup_on_exit = 0;
+
+/* Non-zero means to list status of running and stopped jobs at shell exit */
+int check_jobs_at_exit = 0;
+
+/* Non-zero means to change to a directory name supplied as a command name */
+int autocd = 0;
+
/* Tells what state the shell was in when it started:
0 = non-interactive shell script
1 = interactive
2 = -c command
+ 3 = wordexp evaluation
This is a superset of the information provided by interactive_shell.
*/
int startup_state = 0;
+int reading_shell_script = 0;
/* Special debugging helper. */
int debugging_login_shell = 0;
/* The number of commands executed so far. */
int current_command_number = 1;
-/* The environment at the top-level REP loop. We use this in the case of
- error return. */
-jmp_buf top_level, catch;
-
-#if defined (JOB_CONTROL) || defined (_POSIX_VERSION)
-/* The signal masks that this shell runs with. */
-sigset_t top_level_mask;
-#endif /* JOB_CONTROL */
-
/* Non-zero is the recursion depth for commands. */
int indirection_level = 0;
-/* The number of times BASH has been executed. This is set
- by initialize_variables () in variables.c. */
-int shell_level = 0;
-
/* The name of this shell, as taken from argv[0]. */
char *shell_name = (char *)NULL;
/* time in seconds when the shell was started */
time_t shell_start_time;
+struct timeval shellstart;
+
+/* Are we running in an emacs shell window? */
+int running_under_emacs;
+
+/* Do we have /dev/fd? */
+#ifdef HAVE_DEV_FD
+int have_devfd = HAVE_DEV_FD;
+#else
+int have_devfd = 0;
+#endif
/* The name of the .(shell)rc file. */
-static char *bashrc_file = "~/.bashrc";
+static char *bashrc_file = DEFAULT_BASHRC;
/* Non-zero means to act more like the Bourne shell on startup. */
-static int act_like_sh = 0;
+static int act_like_sh;
+
+/* Non-zero if this shell is being run by `su'. */
+static int su_shell;
+
+/* Non-zero if we have already expanded and sourced $ENV. */
+static int sourced_env;
+
+/* Is this shell running setuid? */
+static int running_setuid;
/* Values for the long-winded argument names. */
-static int debugging = 0; /* Do debugging things. */
-static int no_rc = 0; /* Don't execute ~/.bashrc */
-static int no_profile = 0; /* Don't execute .profile */
-static int do_version = 0; /* Display interesting version info. */
-static int quiet = 0; /* Be quiet when starting up. */
-static int make_login_shell = 0; /* Make this shell be a `-bash' shell. */
+static int debugging; /* Do debugging things. */
+static int no_rc; /* Don't execute ~/.bashrc */
+static int no_profile; /* Don't execute .profile */
+static int do_version; /* Display interesting version info. */
+static int make_login_shell; /* Make this shell be a `-bash' shell. */
+static int want_initial_help; /* --help option */
+
+int debugging_mode = 0; /* In debugging mode with --debugger */
+#if defined (READLINE)
+int no_line_editing = 0; /* non-zero -> don't do fancy line editing. */
+#else
+int no_line_editing = 1; /* can't have line editing without readline */
+#endif
+#if defined (TRANSLATABLE_STRINGS)
+int dump_translatable_strings; /* Dump strings in $"...", don't execute. */
+int dump_po_strings; /* Dump strings in $"..." in po format */
+#endif
+int wordexp_only = 0; /* Do word expansion only */
+int protected_mode = 0; /* No command substitution with --wordexp */
-int no_line_editing = 0; /* Don't do fancy line editing. */
-int no_brace_expansion = 0; /* Non-zero means no foo{a,b} -> fooa foob. */
+int pretty_print_mode = 0; /* pretty-print a shell script */
+#if defined (STRICT_POSIX)
+int posixly_correct = 1; /* Non-zero means posix.2 superset. */
+#else
int posixly_correct = 0; /* Non-zero means posix.2 superset. */
+#endif
/* Some long-winded argument names. These are obviously new. */
#define Int 1
#define Charp 2
-struct {
- char *name;
+static const struct {
+ const char *name;
int type;
int *int_value;
char **char_value;
} long_args[] = {
{ "debug", Int, &debugging, (char **)0x0 },
- { "norc", Int, &no_rc, (char **)0x0 },
+#if defined (DEBUGGER)
+ { "debugger", Int, &debugging_mode, (char **)0x0 },
+#endif
+#if defined (TRANSLATABLE_STRINGS)
+ { "dump-po-strings", Int, &dump_po_strings, (char **)0x0 },
+ { "dump-strings", Int, &dump_translatable_strings, (char **)0x0 },
+#endif
+ { "help", Int, &want_initial_help, (char **)0x0 },
+ { "init-file", Charp, (int *)0x0, &bashrc_file },
+ { "login", Int, &make_login_shell, (char **)0x0 },
+ { "noediting", Int, &no_line_editing, (char **)0x0 },
{ "noprofile", Int, &no_profile, (char **)0x0 },
+ { "norc", Int, &no_rc, (char **)0x0 },
+ { "posix", Int, &posixly_correct, (char **)0x0 },
+ { "pretty-print", Int, &pretty_print_mode, (char **)0x0 },
+#if defined (WORDEXP_OPTION)
+ { "protected", Int, &protected_mode, (char **)0x0 },
+#endif
{ "rcfile", Charp, (int *)0x0, &bashrc_file },
+#if defined (RESTRICTED_SHELL)
+ { "restricted", Int, &restricted, (char **)0x0 },
+#endif
+ { "verbose", Int, &verbose_flag, (char **)0x0 },
{ "version", Int, &do_version, (char **)0x0 },
- { "quiet", Int, &quiet, (char **)0x0 },
- { "login", Int, &make_login_shell, (char **)0x0 },
- { "nolineediting", Int, &no_line_editing, (char **)0x0 },
- { "nobraceexpansion", Int, &no_brace_expansion, (char **)0x0 },
- { "posix", Int, &posixly_correct, (char **)0x0 },
+#if defined (WORDEXP_OPTION)
+ { "wordexp", Int, &wordexp_only, (char **)0x0 },
+#endif
{ (char *)0x0, Int, (int *)0x0, (char **)0x0 }
};
longjmp back to main to execute a shell script, instead of calling
main () again and resulting in indefinite, possibly fatal, stack
growth. */
-jmp_buf subshell_top_level;
+procenv_t subshell_top_level;
int subshell_argc;
char **subshell_argv;
char **subshell_envp;
+char *exec_argv0;
+
#if defined (BUFFERED_INPUT)
/* The file descriptor from which the shell is reading input. */
int default_buffered_input = -1;
#endif
-static int want_pending_command;
-static char *local_pending_command;
+/* The following two variables are not static so they can show up in $-. */
+int read_from_stdin; /* -s flag supplied */
+int want_pending_command; /* -c flag supplied */
+
+/* This variable is not static so it can be bound to $BASH_EXECUTION_STRING */
+char *command_execution_string; /* argument to -c option */
+char *shell_script_filename; /* shell script */
+
+int malloc_trace_at_exit = 0;
+
+static int shell_reinitialized = 0;
+
+static FILE *default_input;
+
+static STRING_INT_ALIST *shopt_alist;
+static int shopt_ind = 0, shopt_len = 0;
+
+static int parse_long_options PARAMS((char **, int, int));
+static int parse_shell_options PARAMS((char **, int, int));
+static int bind_args PARAMS((char **, int, int, int));
+
+static void start_debugger PARAMS((void));
+
+static void add_shopt_to_alist PARAMS((char *, int));
+static void run_shopt_alist PARAMS((void));
+
+static void execute_env_file PARAMS((char *));
+static void run_startup_files PARAMS((void));
+static int open_shell_script PARAMS((char *));
+static void set_bash_input PARAMS((void));
+static int run_one_command PARAMS((char *));
+#if defined (WORDEXP_OPTION)
+static int run_wordexp PARAMS((char *));
+#endif
+
+static int uidget PARAMS((void));
+
+static void set_option_defaults PARAMS((void));
+static void reset_option_defaults PARAMS((void));
+
+static void init_interactive PARAMS((void));
+static void init_noninteractive PARAMS((void));
+static void init_interactive_script PARAMS((void));
-static int isnetconn ();
-static void run_startup_files ();
+static void set_shell_name PARAMS((char *));
+static void shell_initialize PARAMS((void));
+static void shell_reinitialize PARAMS((void));
-static void shell_initialize ();
-static void shell_reinitialize ();
-static void initialize_signals ();
-static void initialize_terminating_signals ();
+static void show_shell_usage PARAMS((FILE *, int));
+
+#ifdef __CYGWIN__
+static void
+_cygwin32_check_tmp ()
+{
+ struct stat sb;
+
+ if (stat ("/tmp", &sb) < 0)
+ internal_warning (_("could not find /tmp, please create!"));
+ else
+ {
+ if (S_ISDIR (sb.st_mode) == 0)
+ internal_warning (_("/tmp must be a valid directory name"));
+ }
+}
+#endif /* __CYGWIN__ */
+#if defined (NO_MAIN_ENV_ARG)
+/* systems without third argument to main() */
+int
+main (argc, argv)
+ int argc;
+ char **argv;
+#else /* !NO_MAIN_ENV_ARG */
+int
main (argc, argv, env)
int argc;
char **argv, **env;
+#endif /* !NO_MAIN_ENV_ARG */
{
register int i;
- int arg_index, locally_skip_execution;
- int top_level_arg_index, read_from_stdin;
- FILE *default_input;
+ int code, old_errexit_flag;
+#if defined (RESTRICTED_SHELL)
+ int saverst;
+#endif
+ volatile int locally_skip_execution;
+ volatile int arg_index, top_level_arg_index;
+#ifdef __OPENNT
+ char **env;
+
+ env = environ;
+#endif /* __OPENNT */
+
+ USE_VAR(argc);
+ USE_VAR(argv);
+ USE_VAR(env);
+ USE_VAR(code);
+ USE_VAR(old_errexit_flag);
+#if defined (RESTRICTED_SHELL)
+ USE_VAR(saverst);
+#endif
- /* There is a bug in the NeXT 2.1 rlogind that causes opens
- of /dev/tty to fail. */
-#if defined (RLOGIN_PGRP_BUG)
- {
- int tty_fd;
+ /* Catch early SIGINTs. */
+ code = setjmp_nosigs (top_level);
+ if (code)
+ exit (2);
- tty_fd = open ("/dev/tty", O_RDWR);
+ xtrace_init ();
- if (tty_fd < 0)
- {
- char *tty;
- tty = (char *)ttyname (fileno (stdin));
- tty_fd = open (tty, O_RDWR);
- }
- close (tty_fd);
- }
-#endif /* RLOGIN_PGRP_BUG */
+#if defined (USING_BASH_MALLOC) && defined (DEBUG) && !defined (DISABLE_MALLOC_WRAPPERS)
+ malloc_set_register (1); /* XXX - change to 1 for malloc debugging */
+#endif
+
+ check_dev_tty ();
+
+#ifdef __CYGWIN__
+ _cygwin32_check_tmp ();
+#endif /* __CYGWIN__ */
/* Wait forever if we are debugging a login shell. */
- while (debugging_login_shell);
+ while (debugging_login_shell) sleep (3);
- current_user.uid = getuid ();
- current_user.gid = getgid ();
- current_user.euid = geteuid ();
- current_user.egid = getegid ();
+ set_default_locale ();
- /* See whether or not we are running setuid or setgid. */
- privileged_mode = (current_user.uid != current_user.euid) ||
- (current_user.gid != current_user.egid);
+ running_setuid = uidget ();
- posixly_correct = (getenv ("POSIXLY_CORRECT") != (char *)NULL) ||
- (getenv ("POSIX_PEDANTIC") != (char *)NULL);
+ if (getenv ("POSIXLY_CORRECT") || getenv ("POSIX_PEDANTIC"))
+ posixly_correct = 1;
#if defined (USE_GNU_MALLOC_LIBRARY)
mcheck (programming_error, (void (*) ())0);
#endif /* USE_GNU_MALLOC_LIBRARY */
- if (setjmp (subshell_top_level))
+ if (setjmp_sigs (subshell_top_level))
{
argc = subshell_argc;
argv = subshell_argv;
sourced_env = 0;
}
- /* Initialize local variables for all `invocations' of main (). */
+ shell_reinitialized = 0;
+
+ /* Initialize `local' variables for all `invocations' of main (). */
arg_index = 1;
- local_pending_command = (char *)NULL;
- want_pending_command = 0;
- locally_skip_execution = 0;
- read_from_stdin = 0;
+ if (arg_index > argc)
+ arg_index = argc;
+ command_execution_string = shell_script_filename = (char *)NULL;
+ want_pending_command = locally_skip_execution = read_from_stdin = 0;
default_input = stdin;
#if defined (BUFFERED_INPUT)
default_buffered_input = -1;
shell_name++;
shell_reinitialize ();
- if (setjmp (top_level))
+ if (setjmp_nosigs (top_level))
exit (2);
}
- /* Here's a hack. If the name of this shell is "sh", then don't do
- any startup files; just try to be more like /bin/sh. */
- /* XXX - next version - make this be the same as -posix. */
- shell_name = base_pathname (argv[0]);
- if (*shell_name == '-')
- shell_name++;
- if (shell_name[0] == 's' && shell_name[1] == 'h' && !shell_name[2])
- act_like_sh++;
-
- yydebug = 0;
-
shell_environment = env;
- shell_name = argv[0];
- dollar_vars[0] = savestring (shell_name);
-
- if (*shell_name == '-')
- {
- shell_name++;
- login_shell++;
- }
-
-#if defined (JOB_CONTROL)
- if (act_like_sh)
- job_control = 0; /* XXX - not posix */
-#endif /* JOB_CONTROL */
+ set_shell_name (argv[0]);
- shell_start_time = NOW; /* NOW now defined in general.h */
-
- /* A program may start an interactive shell with
- "execl ("/bin/bash", "-", NULL)".
- If so, default the name of this shell to our name. */
- if (!shell_name || !*shell_name || (shell_name[0] == '-' && !shell_name[1]))
- shell_name = "bash";
+ gettimeofday (&shellstart, 0);
+ shell_start_time = shellstart.tv_sec;
/* Parse argument flags from the input line. */
/* Find full word arguments first. */
- while ((arg_index != argc) && *(argv[arg_index]) == '-')
+ arg_index = parse_long_options (argv, arg_index, argc);
+
+ if (want_initial_help)
{
- for (i = 0; long_args[i].name; i++)
- {
- if (STREQ (&(argv[arg_index][1]), long_args[i].name))
- {
- if (long_args[i].type == Int)
- *long_args[i].int_value = 1;
- else
- {
- if (!argv[++arg_index])
- {
- report_error ("option `%s' expected an argument",
- long_args[i].name);
- exit (1);
- }
- else
- *long_args[i].char_value = argv[arg_index];
- }
- goto handle_next_arg;
- }
- }
- break; /* No such argument. Maybe flag arg. */
- handle_next_arg:
- arg_index++;
+ show_shell_usage (stdout, 1);
+ exit (EXECUTION_SUCCESS);
}
- /* If we're in a strict Posix.2 mode, turn on interactive comments. */
- if (posixly_correct)
- interactive_comments = 1;
-
- /* If user supplied the "-login" flag, then set and invert LOGIN_SHELL. */
- if (make_login_shell)
+ if (do_version)
{
- login_shell++;
- login_shell = -login_shell;
+ show_shell_version (1);
+ exit (EXECUTION_SUCCESS);
}
+ echo_input_at_read = verbose_flag; /* --verbose given */
+
/* All done with full word options; do standard shell option parsing.*/
this_command_name = shell_name; /* for error reporting */
- while (arg_index != argc && argv[arg_index] &&
- (*argv[arg_index] == '-' || *argv[arg_index] == '+'))
- {
- /* There are flag arguments, so parse them. */
- int arg_character, on_or_off, next_arg;
- char *o_option, *arg_string;
-
- i = 1;
- next_arg = arg_index + 1;
- arg_string = argv[arg_index];
- on_or_off = arg_string[0];
-
- /* A single `-' signals the end of options. From the 4.3 BSD sh.
- An option `--' means the same thing; this is the standard
- getopt(3) meaning. */
- if (arg_string[0] == '-' &&
- (arg_string[1] == '\0' ||
- (arg_string[1] == '-' && arg_string[2] == '\0')))
- {
- arg_index++;
- break;
- }
+ arg_index = parse_shell_options (argv, arg_index, argc);
- while (arg_character = arg_string[i++])
- {
- switch (arg_character)
- {
- case 'c':
- want_pending_command = 1;
- break;
+ /* If user supplied the "--login" (or -l) flag, then set and invert
+ LOGIN_SHELL. */
+ if (make_login_shell)
+ {
+ login_shell++;
+ login_shell = -login_shell;
+ }
- case 's':
- read_from_stdin = 1;
- break;
+ set_login_shell ("login_shell", login_shell != 0);
- case 'o':
- o_option = argv[next_arg];
- if (!o_option)
- {
- list_minus_o_opts ();
- break;
- }
- if (set_minus_o_option (on_or_off, o_option) != EXECUTION_SUCCESS)
- exit (1);
- next_arg++;
- break;
+#if defined (TRANSLATABLE_STRINGS)
+ if (dump_po_strings)
+ dump_translatable_strings = 1;
- default:
- if (change_flag (arg_character, on_or_off) == FLAG_ERROR)
- {
- report_error ("%c%c: bad option", on_or_off, arg_character);
- exit (1);
- }
+ if (dump_translatable_strings)
+ read_but_dont_execute = 1;
+#endif
- }
- }
- /* Can't do just a simple increment anymore -- what about
- "bash -abouo emacs ignoreeof -hP"? */
- arg_index = next_arg;
- }
+ if (running_setuid && privileged_mode == 0)
+ disable_priv_mode ();
/* Need to get the argument to a -c option processed in the
above loop. The next arg is a command to execute, and the
following args are $0...$n respectively. */
if (want_pending_command)
{
- local_pending_command = argv[arg_index];
- if (!local_pending_command)
+ command_execution_string = argv[arg_index];
+ if (command_execution_string == 0)
{
- report_error ("`-c' requires an argument");
- exit (1);
+ report_error (_("%s: option requires an argument"), "-c");
+ exit (EX_BADUSAGE);
}
arg_index++;
}
- this_command_name = (char *)NULL;
+ this_command_name = (char *)NULL;
/* First, let the outside world know about our interactive status.
A shell is interactive if the `-i' flag was given, or if all of
no -c command
no arguments remaining or the -s flag given
standard input is a terminal
- standard output is a terminal
+ standard error is a terminal
Refer to Posix.2, the description of the `sh' utility. */
if (forced_interactive || /* -i flag */
- (!local_pending_command && /* No -c command and ... */
+ (!command_execution_string && /* No -c command and ... */
+ wordexp_only == 0 && /* No --wordexp and ... */
((arg_index == argc) || /* no remaining args or... */
read_from_stdin) && /* -s flag with args, and */
isatty (fileno (stdin)) && /* Input is a terminal and */
- isatty (fileno (stdout)))) /* output is a terminal. */
- {
- interactive_shell = startup_state = interactive = 1;
- }
+ isatty (fileno (stderr)))) /* error output is a terminal. */
+ init_interactive ();
else
- {
-#if defined (HISTORY)
-# if defined (BANG_HISTORY)
- history_expansion = 0;
-# endif
- remember_on_history = 0;
-#endif /* HISTORY */
- interactive_shell = startup_state = interactive = 0;
- no_line_editing = 1;
-#if defined (JOB_CONTROL)
- job_control = 0;
-#endif /* JOB_CONTROL */
- }
+ init_noninteractive ();
-#define CLOSE_FDS_AT_LOGIN
-#if defined (CLOSE_FDS_AT_LOGIN)
/*
* Some systems have the bad habit of starting login shells with lots of open
* file descriptors. For instance, most systems that have picked up the
* pre-4.0 Sun YP code leave a file descriptor open each time you call one
* of the getpw* functions, and it's set to be open across execs. That
- * means one for login, one for xterm, one for shelltool, etc.
+ * means one for login, one for xterm, one for shelltool, etc. There are
+ * also systems that open persistent FDs to other agents or files as part
+ * of process startup; these need to be set to be close-on-exec.
*/
if (login_shell && interactive_shell)
{
for (i = 3; i < 20; i++)
- close (i);
+ SET_CLOSE_ON_EXEC (i);
+ }
+
+ /* If we're in a strict Posix.2 mode, turn on interactive comments,
+ alias expansion in non-interactive shells, and other Posix.2 things. */
+ if (posixly_correct)
+ {
+ bind_variable ("POSIXLY_CORRECT", "y", 0);
+ sv_strict_posix ("POSIXLY_CORRECT");
}
-#endif /* CLOSE_FDS_AT_LOGIN */
+
+ /* Now we run the shopt_alist and process the options. */
+ if (shopt_alist)
+ run_shopt_alist ();
/* From here on in, the shell must be a normal functioning shell.
Variables from the environment are expected to be set, etc. */
shell_initialize ();
+ set_default_lang ();
+ set_default_locale_vars ();
+
+ /*
+ * M-x term -> TERM=eterm-color INSIDE_EMACS='251,term:0.96' (eterm)
+ * M-x shell -> TERM='dumb' INSIDE_EMACS='25.1,comint' (no line editing)
+ *
+ * Older versions of Emacs may set EMACS to 't' or to something like
+ * '22.1 (term:0.96)' instead of (or in addition to) setting INSIDE_EMACS.
+ * They may set TERM to 'eterm' instead of 'eterm-color'. They may have
+ * a now-obsolete command that sets neither EMACS nor INSIDE_EMACS:
+ * M-x terminal -> TERM='emacs-em7955' (line editing)
+ */
if (interactive_shell)
{
- char *term = getenv ("TERM");
- no_line_editing |= term && (STREQ (term, "emacs"));
+ char *term, *emacs, *inside_emacs;
+ int emacs_term, in_emacs;
+
+ term = get_string_value ("TERM");
+ emacs = get_string_value ("EMACS");
+ inside_emacs = get_string_value ("INSIDE_EMACS");
+
+ if (inside_emacs)
+ {
+ emacs_term = strstr (inside_emacs, ",term:") != 0;
+ in_emacs = 1;
+ }
+ else if (emacs)
+ {
+ /* Infer whether we are in an older Emacs. */
+ emacs_term = strstr (emacs, " (term:") != 0;
+ in_emacs = emacs_term || STREQ (emacs, "t");
+ }
+ else
+ in_emacs = emacs_term = 0;
+
+ /* Not sure any emacs terminal emulator sets TERM=emacs any more */
+ no_line_editing |= STREQ (term, "emacs");
+ no_line_editing |= in_emacs && STREQ (term, "dumb");
+
+ /* running_under_emacs == 2 for `eterm' */
+ running_under_emacs = in_emacs || STREQN (term, "emacs", 5);
+ running_under_emacs += emacs_term && STREQN (term, "eterm", 5);
+
+ if (running_under_emacs)
+ gnu_error_format = 1;
}
top_level_arg_index = arg_index;
-
- if (!quiet && do_version)
- show_shell_version ();
+ old_errexit_flag = exit_immediately_on_error;
/* Give this shell a place to longjmp to before executing the
startup files. This allows users to press C-c to abort the
lengthy startup. */
- {
- int code;
-
- code = setjmp (top_level);
-
- if (code)
- {
- if (code == EXITPROG)
- goto exit_shell;
- else
+ code = setjmp_sigs (top_level);
+ if (code)
+ {
+ if (code == EXITPROG || code == ERREXIT || code == EXITBLTIN)
+ exit_shell (last_command_exit_value);
+ else
+ {
+#if defined (JOB_CONTROL)
+ /* Reset job control, since run_startup_files turned it off. */
+ set_job_control (interactive_shell);
+#endif
+ /* Reset value of `set -e', since it's turned off before running
+ the startup files. */
+ exit_immediately_on_error += old_errexit_flag;
locally_skip_execution++;
- }
- }
+ }
+ }
arg_index = top_level_arg_index;
/* Execute the start-up scripts. */
- if (!interactive_shell)
+ if (interactive_shell == 0)
{
- makunbound ("PS1", shell_variables);
- makunbound ("PS2", shell_variables);
+ unbind_variable ("PS1");
+ unbind_variable ("PS2");
interactive = 0;
+#if 0
+ /* This has already been done by init_noninteractive */
+ expand_aliases = posixly_correct;
+#endif
}
else
{
interactive = 1;
}
- if (!locally_skip_execution)
- run_startup_files ();
+#if defined (RESTRICTED_SHELL)
+ /* Set restricted_shell based on whether the basename of $0 indicates that
+ the shell should be restricted or if the `-r' option was supplied at
+ startup. */
+ restricted_shell = shell_is_restricted (shell_name);
+
+ /* If the `-r' option is supplied at invocation, make sure that the shell
+ is not in restricted mode when running the startup files. */
+ saverst = restricted;
+ restricted = 0;
+#endif
+
+ /* Set positional parameters before running startup files. top_level_arg_index
+ holds the index of the current argument before setting the positional
+ parameters, so any changes performed in the startup files won't affect
+ later option processing. */
+ if (wordexp_only)
+ ; /* nothing yet */
+ else if (command_execution_string)
+ arg_index = bind_args (argv, arg_index, argc, 0); /* $0 ... $n */
+ else if (arg_index != argc && read_from_stdin == 0)
+ {
+ shell_script_filename = argv[arg_index++];
+ arg_index = bind_args (argv, arg_index, argc, 1); /* $1 ... $n */
+ }
+ else
+ arg_index = bind_args (argv, arg_index, argc, 1); /* $1 ... $n */
+
+ /* The startup files are run with `set -e' temporarily disabled. */
+ if (locally_skip_execution == 0 && running_setuid == 0)
+ {
+ char *t;
+
+ old_errexit_flag = exit_immediately_on_error;
+ exit_immediately_on_error = 0;
+
+ /* Temporarily set $0 while running startup files, then restore it so
+ we get better error messages when trying to open script files. */
+ if (shell_script_filename)
+ {
+ t = dollar_vars[0];
+ dollar_vars[0] = exec_argv0 ? savestring (exec_argv0) : savestring (shell_script_filename);
+ }
+ run_startup_files ();
+ if (shell_script_filename)
+ {
+ free (dollar_vars[0]);
+ dollar_vars[0] = t;
+ }
+ exit_immediately_on_error += old_errexit_flag;
+ }
+
+ /* If we are invoked as `sh', turn on Posix mode. */
+ if (act_like_sh)
+ {
+ bind_variable ("POSIXLY_CORRECT", "y", 0);
+ sv_strict_posix ("POSIXLY_CORRECT");
+ }
#if defined (RESTRICTED_SHELL)
- /* I turn on the restrictions afterwards because it is explictly
- stated in the POSIX spec that PATH cannot be set in a restricted
- shell, except in .profile. */
+ /* Turn on the restrictions after executing the startup files. This
+ means that `bash -r' or `set -r' invoked from a startup file will
+ turn on the restrictions after the startup files are executed. */
+ restricted = saverst || restricted;
+ if (shell_reinitialized == 0)
maybe_make_restricted (shell_name);
#endif /* RESTRICTED_SHELL */
- if (local_pending_command)
- {
- /* Bind remaining args to $0 ... $n */
- WORD_LIST *args = (WORD_LIST *)NULL;
- while (arg_index != argc)
- args = make_word_list (make_word (argv[arg_index++]), args);
- if (args)
- {
- args = REVERSE_LIST (args, WORD_LIST *);
- /* Posix.2 4.56.3 says that the first argument after
- sh -c command becomes $0, and the rest of the arguments
- are bound to $1 ... $N. */
- shell_name = savestring (args->word->word); /* XXX */
- dollar_vars[0] = savestring (args->word->word);
- remember_args (args->next, 1);
- dispose_words (args);
- }
-
- startup_state = 2;
+#if defined (WORDEXP_OPTION)
+ if (wordexp_only)
+ {
+ startup_state = 3;
+ last_command_exit_value = run_wordexp (argv[top_level_arg_index]);
+ exit_shell (last_command_exit_value);
+ }
+#endif
+
+ cmd_init (); /* initialize the command object caches */
+ uwp_init ();
+
+ if (command_execution_string)
+ {
+ startup_state = 2;
+
+ if (debugging_mode)
+ start_debugger ();
+
#if defined (ONESHOT)
- run_one_command (local_pending_command);
- goto exit_shell;
+ executing = 1;
+ run_one_command (command_execution_string);
+ exit_shell (last_command_exit_value);
#else /* ONESHOT */
- with_input_from_string (local_pending_command, "-c");
- goto read_and_execute;
+ with_input_from_string (command_execution_string, "-c");
+ goto read_and_execute;
#endif /* !ONESHOT */
- }
+ }
+
+ /* Get possible input filename and set up default_buffered_input or
+ default_input as appropriate. */
+ if (shell_script_filename)
+ open_shell_script (shell_script_filename);
+ else if (interactive == 0)
+ {
+ /* In this mode, bash is reading a script from stdin, which is a
+ pipe or redirected file. */
+#if defined (BUFFERED_INPUT)
+ default_buffered_input = fileno (stdin); /* == 0 */
+#else
+ setbuf (default_input, (char *)NULL);
+#endif /* !BUFFERED_INPUT */
+ read_from_stdin = 1;
+ }
+ else if (top_level_arg_index == argc) /* arg index before startup files */
+ /* "If there are no operands and the -c option is not specified, the -s
+ option shall be assumed." */
+ read_from_stdin = 1;
+
+ set_bash_input ();
+
+ if (debugging_mode && locally_skip_execution == 0 && running_setuid == 0 && (reading_shell_script || interactive_shell == 0))
+ start_debugger ();
/* Do the things that should be done only for interactive shells. */
if (interactive_shell)
{
/* Set up for checking for presence of mail. */
- remember_mail_dates ();
reset_mail_timer ();
+ init_mail_dates ();
#if defined (HISTORY)
/* Initialize the interactive history stuff. */
- if (!shell_initialized)
+ bash_initialize_history ();
+ /* Don't load the history from the history file if we've already
+ saved some lines in this session (e.g., by putting `history -s xx'
+ into one of the startup files). */
+ if (shell_initialized == 0 && history_lines_this_session == 0)
load_history ();
#endif /* HISTORY */
get_tty_state ();
}
- /* Get possible input filename. */
- if ((arg_index != argc) && !read_from_stdin)
- {
- int fd;
- char *filename;
+#if !defined (ONESHOT)
+ read_and_execute:
+#endif /* !ONESHOT */
- free (dollar_vars[0]);
- dollar_vars[0] = savestring (argv[arg_index]);
- filename = savestring (argv[arg_index]);
+ shell_initialized = 1;
- fd = open (filename, O_RDONLY);
- if ((fd < 0) && (errno == ENOENT) && (absolute_program (filename) == 0))
- {
- char *path_filename;
- /* If it's not in the current directory, try looking through PATH
- for it. */
- path_filename = find_path_file (argv[arg_index]);
- if (path_filename)
- {
- free (filename);
- filename = path_filename;
- fd = open (filename, O_RDONLY);
- }
- }
+ if (pretty_print_mode && interactive_shell)
+ {
+ internal_warning (_("pretty-printing mode ignored in interactive shells"));
+ pretty_print_mode = 0;
+ }
+ if (pretty_print_mode)
+ exit_shell (pretty_print_loop ());
- arg_index++;
- if (fd < 0)
+ /* Read commands until exit condition. */
+ reader_loop ();
+ exit_shell (last_command_exit_value);
+}
+
+static int
+parse_long_options (argv, arg_start, arg_end)
+ char **argv;
+ int arg_start, arg_end;
+{
+ int arg_index, longarg, i;
+ char *arg_string;
+
+ arg_index = arg_start;
+ while ((arg_index != arg_end) && (arg_string = argv[arg_index]) &&
+ (*arg_string == '-'))
+ {
+ longarg = 0;
+
+ /* Make --login equivalent to -login. */
+ if (arg_string[1] == '-' && arg_string[2])
{
- file_error (filename);
- exit (1);
+ longarg = 1;
+ arg_string++;
}
- /* Only do this with file descriptors we can seek on. */
- if (lseek (fd, 0L, 1) != -1)
+ for (i = 0; long_args[i].name; i++)
{
- unsigned char sample[80];
- int sample_len;
-
- /* Check to see if the `file' in `bash file' is a binary file
- according to the same tests done by execute_simple_command (),
- and report an error and exit if it is. */
- sample_len = read (fd, sample, sizeof (sample));
- if (sample_len > 0 && (check_binary_file (sample, sample_len)))
+ if (STREQ (arg_string + 1, long_args[i].name))
{
- report_error ("%s: cannot execute binary file", filename);
- exit (EX_BINARY_FILE);
+ if (long_args[i].type == Int)
+ *long_args[i].int_value = 1;
+ else if (argv[++arg_index] == 0)
+ {
+ report_error (_("%s: option requires an argument"), long_args[i].name);
+ exit (EX_BADUSAGE);
+ }
+ else
+ *long_args[i].char_value = argv[arg_index];
+
+ break;
}
- /* Now rewind the file back to the beginning. */
- lseek (fd, 0L, 0);
}
-
-#if defined (BUFFERED_INPUT)
- default_buffered_input = fd;
- if (default_buffered_input == -1)
+ if (long_args[i].name == 0)
{
- file_error (filename);
- exit (127);
+ if (longarg)
+ {
+ report_error (_("%s: invalid option"), argv[arg_index]);
+ show_shell_usage (stderr, 0);
+ exit (EX_BADUSAGE);
+ }
+ break; /* No such argument. Maybe flag arg. */
}
- SET_CLOSE_ON_EXEC (default_buffered_input);
-#else /* !BUFFERED_INPUT */
+ arg_index++;
+ }
- /* Open the script. But try to move the file descriptor to a randomly
- large one, in the hopes that any descriptors used by the script will
- not match with ours. */
- {
- int script_fd, nfds;
-
- nfds = getdtablesize ();
- if (nfds <= 0)
- nfds = 20;
- if (nfds > 256)
- nfds = 256;
- script_fd = dup2 (fd, nfds - 1);
- if (script_fd)
- {
- close (fd);
- fd = script_fd;
- }
- }
+ return (arg_index);
+}
+
+static int
+parse_shell_options (argv, arg_start, arg_end)
+ char **argv;
+ int arg_start, arg_end;
+{
+ int arg_index;
+ int arg_character, on_or_off, next_arg, i;
+ char *o_option, *arg_string;
+
+ arg_index = arg_start;
+ while (arg_index != arg_end && (arg_string = argv[arg_index]) &&
+ (*arg_string == '-' || *arg_string == '+'))
+ {
+ /* There are flag arguments, so parse them. */
+ next_arg = arg_index + 1;
- default_input = fdopen (fd, "r");
+ /* A single `-' signals the end of options. From the 4.3 BSD sh.
+ An option `--' means the same thing; this is the standard
+ getopt(3) meaning. */
+ if (arg_string[0] == '-' &&
+ (arg_string[1] == '\0' ||
+ (arg_string[1] == '-' && arg_string[2] == '\0')))
+ return (next_arg);
- if (!default_input)
+ i = 1;
+ on_or_off = arg_string[0];
+ while (arg_character = arg_string[i++])
{
- file_error (filename);
- exit (127);
- }
+ switch (arg_character)
+ {
+ case 'c':
+ want_pending_command = 1;
+ break;
- SET_CLOSE_ON_EXEC (fd);
- if (fileno (default_input) != fd)
- SET_CLOSE_ON_EXEC (fileno (default_input));
+ case 'l':
+ make_login_shell = 1;
+ break;
-#endif /* !BUFFERED_INPUT */
+ case 's':
+ read_from_stdin = 1;
+ break;
- if (!interactive_shell || (!isatty (fd)))
- {
-#if defined (HISTORY)
-# if defined (BANG_HISTORY)
- history_expansion = 0;
-# endif
- remember_on_history = 0;
-#endif /* HISTORY */
- interactive = interactive_shell = 0;
- no_line_editing = 1;
-#if defined (JOB_CONTROL)
- set_job_control (0);
-#endif /* JOB_CONTROL */
- }
- else
- {
- /* I don't believe that this code is ever executed, even in
- the presence of /dev/fd. */
- dup2 (fd, 0);
- close (fd);
- fclose (default_input);
- }
- }
- else if (!interactive)
- /* In this mode, bash is reading a script from stdin, which is a
- pipe or redirected file. */
-#if defined (BUFFERED_INPUT)
- default_buffered_input = fileno (stdin); /* == 0 */
-#else
- setbuf (default_input, (char *)NULL);
-#endif /* !BUFFERED_INPUT */
+ case 'o':
+ o_option = argv[next_arg];
+ if (o_option == 0)
+ {
+ set_option_defaults ();
+ list_minus_o_opts (-1, (on_or_off == '-') ? 0 : 1);
+ reset_option_defaults ();
+ break;
+ }
+ if (set_minus_o_option (on_or_off, o_option) != EXECUTION_SUCCESS)
+ exit (EX_BADUSAGE);
+ next_arg++;
+ break;
- /* Bind remaining args to $1 ... $n */
- {
- WORD_LIST *args = (WORD_LIST *)NULL;
- while (arg_index != argc)
- args = make_word_list (make_word (argv[arg_index++]), args);
- args = REVERSE_LIST (args, WORD_LIST *);
- remember_args (args, 1);
- dispose_words (args);
- }
+ case 'O':
+ /* Since some of these can be overridden by the normal
+ interactive/non-interactive shell initialization or
+ initializing posix mode, we save the options and process
+ them after initialization. */
+ o_option = argv[next_arg];
+ if (o_option == 0)
+ {
+ shopt_listopt (o_option, (on_or_off == '-') ? 0 : 1);
+ break;
+ }
+ add_shopt_to_alist (o_option, on_or_off);
+ next_arg++;
+ break;
-#if defined (BUFFERED_INPUT)
- if (!interactive)
- unset_nodelay_mode (default_buffered_input);
- else
- unset_nodelay_mode (fileno (stdin));
-#else
- unset_nodelay_mode (fileno (stdin));
-#endif /* !BUFFERED_INPUT */
+ case 'D':
+#if defined (TRANSLATABLE_STRINGS)
+ dump_translatable_strings = 1;
+#endif
+ break;
- /* with_input_from_stdin really means `with_input_from_readline' */
- if (interactive && !no_line_editing)
- with_input_from_stdin ();
- else
-#if defined (BUFFERED_INPUT)
- {
- if (!interactive)
- with_input_from_buffered_stream (default_buffered_input, dollar_vars[0]);
- else
- with_input_from_stream (default_input, dollar_vars[0]);
+ default:
+ if (change_flag (arg_character, on_or_off) == FLAG_ERROR)
+ {
+ report_error (_("%c%c: invalid option"), on_or_off, arg_character);
+ show_shell_usage (stderr, 0);
+ exit (EX_BADUSAGE);
+ }
+ }
+ }
+ /* Can't do just a simple increment anymore -- what about
+ "bash -abouo emacs ignoreeof -hP"? */
+ arg_index = next_arg;
}
-#else /* !BUFFERED_INPUT */
- with_input_from_stream (default_input, dollar_vars[0]);
-#endif /* !BUFFERED_INPUT */
-#if !defined (ONESHOT)
- read_and_execute:
-#endif /* !ONESHOT */
+ return (arg_index);
+}
- shell_initialized = 1;
+/* Exit the shell with status S. */
+void
+exit_shell (s)
+ int s;
+{
+ fflush (stdout); /* XXX */
+ fflush (stderr);
- /* Read commands until exit condition. */
- reader_loop ();
+ /* Clean up the terminal if we are in a state where it's been modified. */
+#if defined (READLINE)
+ if (RL_ISSTATE (RL_STATE_TERMPREPPED) && rl_deprep_term_function)
+ (*rl_deprep_term_function) ();
+#endif
+ if (read_tty_modified ())
+ read_tty_cleanup ();
- exit_shell:
- /* Do trap[0] if defined. */
+ /* Do trap[0] if defined. Allow it to override the exit status
+ passed to us. */
if (signal_is_trapped (0))
- last_command_exit_value = run_exit_trap ();
+ s = run_exit_trap ();
#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
+ unlink_all_fifos ();
#endif /* PROCESS_SUBSTITUTION */
#if defined (HISTORY)
- if (interactive_shell)
+ if (remember_on_history)
maybe_save_shell_history ();
#endif /* HISTORY */
+#if defined (COPROCESS_SUPPORT)
+ coproc_flush ();
+#endif
+
#if defined (JOB_CONTROL)
- /* If this shell is interactive, terminate all stopped jobs and
- restore the original terminal process group. */
- end_job_control ();
+ /* If the user has run `shopt -s huponexit', hangup all jobs when we exit
+ an interactive login shell. ksh does this unconditionally. */
+ if (interactive_shell && login_shell && hup_on_exit)
+ hangup_all_jobs ();
+
+ /* If this shell is interactive, or job control is active, terminate all
+ stopped jobs and restore the original terminal process group. Don't do
+ this if we're in a subshell and calling exit_shell after, for example,
+ a failed word expansion. We want to do this even if the shell is not
+ interactive because we set the terminal's process group when job control
+ is enabled regardless of the interactive status. */
+ if (subshell_environment == 0)
+ end_job_control ();
#endif /* JOB_CONTROL */
/* Always return the exit status of the last command to our parent. */
- exit (last_command_exit_value);
+ sh_exit (s);
+}
+
+/* A wrapper for exit that (optionally) can do other things, like malloc
+ statistics tracing. */
+void
+sh_exit (s)
+ int s;
+{
+#if defined (MALLOC_DEBUG) && defined (USING_BASH_MALLOC)
+ if (malloc_trace_at_exit && (subshell_environment & (SUBSHELL_COMSUB|SUBSHELL_PROCSUB)) == 0)
+ trace_malloc_stats (get_name_for_error (), (char *)NULL);
+ /* mlocation_write_table (); */
+#endif
+
+ exit (s);
+}
+
+/* Exit a subshell, which includes calling the exit trap. We don't want to
+ do any more cleanup, since a subshell is created as an exact copy of its
+ parent. */
+void
+subshell_exit (s)
+ int s;
+{
+ fflush (stdout);
+ fflush (stderr);
+
+ /* Do trap[0] if defined. Allow it to override the exit status
+ passed to us. */
+ last_command_exit_value = s;
+ if (signal_is_trapped (0))
+ s = run_exit_trap ();
+
+ sh_exit (s);
}
-#if !defined (SYS_PROFILE)
-# define SYS_PROFILE "/etc/profile"
-#endif /* !SYS_PROFILE */
+void
+set_exit_status (s)
+ int s;
+{
+ set_pipestatus_from_exit (last_command_exit_value = s);
+}
/* Source the bash startup files. If POSIXLY_CORRECT is non-zero, we obey
the Posix.2 startup file rules: $ENV is expanded, and if the file it
names exists, that file is sourced. The Posix.2 rules are in effect
- for both interactive and non-interactive shells (section 4.56.5.3) */
+ for interactive shells only. (section 4.56.5.3) */
+
+/* Execute ~/.bashrc for most shells. Never execute it if
+ ACT_LIKE_SH is set, or if NO_RC is set.
+
+ If the executable file "/usr/gnu/src/bash/foo" contains:
+
+ #!/usr/gnu/bin/bash
+ echo hello
+
+ then:
+
+ COMMAND EXECUTE BASHRC
+ --------------------------------
+ bash -c foo NO
+ bash foo NO
+ foo NO
+ rsh machine ls YES (for rsh, which calls `bash -c')
+ rsh machine foo YES (for shell started by rsh) NO (for foo!)
+ echo ls | bash NO
+ login NO
+ bash YES
+*/
+
+static void
+execute_env_file (env_file)
+ char *env_file;
+{
+ char *fn;
+
+ if (env_file && *env_file)
+ {
+ fn = expand_string_unsplit_to_string (env_file, Q_DOUBLE_QUOTES);
+ if (fn && *fn)
+ maybe_execute_file (fn, 1);
+ FREE (fn);
+ }
+}
+
static void
run_startup_files ()
{
- if (!posixly_correct)
+#if defined (JOB_CONTROL)
+ int old_job_control;
+#endif
+ int sourced_login, run_by_ssh;
+
+#if 1 /* TAG:bash-5.3 andrew.gregory.8@gmail.com 2/21/2022 */
+ /* get the rshd/sshd case out of the way first. */
+ if (interactive_shell == 0 && no_rc == 0 && login_shell == 0 &&
+ act_like_sh == 0 && command_execution_string)
{
- if (login_shell)
+#ifdef SSH_SOURCE_BASHRC
+ run_by_ssh = (find_variable ("SSH_CLIENT") != (SHELL_VAR *)0) ||
+ (find_variable ("SSH2_CLIENT") != (SHELL_VAR *)0);
+#else
+ run_by_ssh = 0;
+#endif
+#endif
+
+ /* If we were run by sshd or we think we were run by rshd, execute
+ ~/.bashrc if we are a top-level shell. */
+#if 1 /* TAG:bash-5.3 */
+ if ((run_by_ssh || isnetconn (fileno (stdin))) && shell_level < 2)
+#else
+ if (isnetconn (fileno (stdin) && shell_level < 2)
+#endif
{
- /* We don't execute .bashrc for login shells. */
- no_rc++;
- if (no_profile == 0)
- maybe_execute_file (SYS_PROFILE, 1);
- }
+#ifdef SYS_BASHRC
+# if defined (__OPENNT)
+ maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1);
+# else
+ maybe_execute_file (SYS_BASHRC, 1);
+# endif
+#endif
+ maybe_execute_file (bashrc_file, 1);
+ return;
+ }
+ }
- if (login_shell && !no_profile)
- {
- if (act_like_sh)
- maybe_execute_file ("~/.profile", 1);
- else
- {
- if (maybe_execute_file ("~/.bash_profile", 1) == 0)
- if (maybe_execute_file ("~/.bash_login", 1) == 0)
- maybe_execute_file ("~/.profile", 1);
- }
- }
+#if defined (JOB_CONTROL)
+ /* Startup files should be run without job control enabled. */
+ old_job_control = interactive_shell ? set_job_control (0) : 0;
+#endif
- /* Execute ~/.bashrc for most shells. Never execute it if
- ACT_LIKE_SH is set, or if NO_RC is set.
-
- If the executable file "/usr/gnu/src/bash/foo" contains:
-
- #!/usr/gnu/bin/bash
- echo hello
-
- then:
-
- COMMAND EXECUTE BASHRC
- --------------------------------
- bash -c foo NO
- bash foo NO
- foo NO
- rsh machine ls YES (for rsh, which calls `bash -c')
- rsh machine foo YES (for shell started by rsh) NO (for foo!)
- echo ls | bash NO
- login NO
- bash YES
- */
- if (!act_like_sh && !no_rc &&
- (interactive_shell || (isnetconn (fileno (stdin)) &&
- local_pending_command)))
- maybe_execute_file (bashrc_file, 1);
- }
+ sourced_login = 0;
- /* Try a TMB suggestion. If running a script, then execute the
- file mentioned in the ENV variable. */
- if (!privileged_mode && sourced_env++ == 0 && act_like_sh == 0 &&
- (posixly_correct || !interactive_shell))
+ /* A shell begun with the --login (or -l) flag that is not in posix mode
+ runs the login shell startup files, no matter whether or not it is
+ interactive. If NON_INTERACTIVE_LOGIN_SHELLS is defined, run the
+ startup files if argv[0][0] == '-' as well. */
+#if defined (NON_INTERACTIVE_LOGIN_SHELLS)
+ if (login_shell && posixly_correct == 0)
+#else
+ if (login_shell < 0 && posixly_correct == 0)
+#endif
{
- char *env_file = (char *)NULL;
+ /* We don't execute .bashrc for login shells. */
+ no_rc++;
+
+ /* Execute /etc/profile and one of the personal login shell
+ initialization files. */
+ if (no_profile == 0)
+ {
+ maybe_execute_file (SYS_PROFILE, 1);
+
+ if (act_like_sh) /* sh */
+ maybe_execute_file ("~/.profile", 1);
+ else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) &&
+ (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */
+ maybe_execute_file ("~/.profile", 1);
+ }
- if (!posixly_correct)
- env_file = getenv ("BASH_ENV");
- if (!env_file)
- env_file = getenv ("ENV");
+ sourced_login = 1;
+ }
+
+ /* A non-interactive shell not named `sh' and not in posix mode reads and
+ executes commands from $BASH_ENV. If `su' starts a shell with `-c cmd'
+ and `-su' as the name of the shell, we want to read the startup files.
+ No other non-interactive shells read any startup files. */
+ if (interactive_shell == 0 && !(su_shell && login_shell))
+ {
+ if (posixly_correct == 0 && act_like_sh == 0 && privileged_mode == 0 &&
+ sourced_env++ == 0)
+ execute_env_file (get_string_value ("BASH_ENV"));
+ return;
+ }
- if (env_file && *env_file)
+ /* Interactive shell or `-su' shell. */
+ if (posixly_correct == 0) /* bash, sh */
+ {
+ if (login_shell && sourced_login++ == 0)
{
- WORD_LIST *list;
- char *expanded_file_name;
+ /* We don't execute .bashrc for login shells. */
+ no_rc++;
- list = expand_string_unsplit (env_file, 1);
- if (list)
+ /* Execute /etc/profile and one of the personal login shell
+ initialization files. */
+ if (no_profile == 0)
{
- expanded_file_name = string_list (list);
- dispose_words (list);
-
- if (expanded_file_name && *expanded_file_name)
- maybe_execute_file (expanded_file_name, 1);
+ maybe_execute_file (SYS_PROFILE, 1);
- if (expanded_file_name)
- free (expanded_file_name);
+ if (act_like_sh) /* sh */
+ maybe_execute_file ("~/.profile", 1);
+ else if ((maybe_execute_file ("~/.bash_profile", 1) == 0) &&
+ (maybe_execute_file ("~/.bash_login", 1) == 0)) /* bash */
+ maybe_execute_file ("~/.profile", 1);
}
}
+
+ /* bash */
+ if (act_like_sh == 0 && no_rc == 0)
+ {
+#ifdef SYS_BASHRC
+# if defined (__OPENNT)
+ maybe_execute_file (_prefixInstallPath(SYS_BASHRC, NULL, 0), 1);
+# else
+ maybe_execute_file (SYS_BASHRC, 1);
+# endif
+#endif
+ maybe_execute_file (bashrc_file, 1);
+ }
+ /* sh */
+ else if (act_like_sh && privileged_mode == 0 && sourced_env++ == 0)
+ execute_env_file (get_string_value ("ENV"));
+ }
+ else /* bash --posix, sh --posix */
+ {
+ /* bash and sh */
+ if (interactive_shell && privileged_mode == 0 && sourced_env++ == 0)
+ execute_env_file (get_string_value ("ENV"));
}
+
+#if defined (JOB_CONTROL)
+ set_job_control (old_job_control);
+#endif
}
#if defined (RESTRICTED_SHELL)
-/* Perhaps make this shell a `restricted' one, based on NAME.
- If the basename of NAME is "rbash", then this shell is restricted.
- In a restricted shell, PATH and SHELL are read-only and non-unsettable.
+/* Return 1 if the shell should be a restricted one based on NAME or the
+ value of `restricted'. Don't actually do anything, just return a
+ boolean value. */
+int
+shell_is_restricted (name)
+ char *name;
+{
+ char *temp;
+
+ if (restricted)
+ return 1;
+ temp = base_pathname (name);
+ if (*temp == '-')
+ temp++;
+ return (STREQ (temp, RESTRICTED_SHELL_NAME));
+}
+
+/* Perhaps make this shell a `restricted' one, based on NAME. If the
+ basename of NAME is "rbash", then this shell is restricted. The
+ name of the restricted shell is a configurable option, see config.h.
+ In a restricted shell, PATH, SHELL, ENV, and BASH_ENV are read-only
+ and non-unsettable.
Do this also if `restricted' is already set to 1; maybe the shell was
started with -r. */
+int
maybe_make_restricted (name)
char *name;
{
char *temp;
- temp = base_pathname (shell_name);
- if (restricted || (STREQ (temp, "rbash")))
+ temp = base_pathname (name);
+ if (*temp == '-')
+ temp++;
+ if (restricted || (STREQ (temp, RESTRICTED_SHELL_NAME)))
{
+#if defined (RBASH_STATIC_PATH_VALUE)
+ bind_variable ("PATH", RBASH_STATIC_PATH_VALUE, 0);
+ stupidly_hack_special_variables ("PATH"); /* clear hash table */
+#endif
set_var_read_only ("PATH");
- non_unsettable ("PATH");
set_var_read_only ("SHELL");
- non_unsettable ("SHELL");
- restricted++;
+ set_var_read_only ("ENV");
+ set_var_read_only ("BASH_ENV");
+ set_var_read_only ("HISTFILE");
+ restricted = 1;
}
+ return (restricted);
}
#endif /* RESTRICTED_SHELL */
-/* Try to execute the contents of FNAME. If FNAME doesn't exist,
- that is not an error, but other kinds of errors are. A non-zero
- FORCE_NONINTERACTIVE means to set the value of `interactive' to
- 0 so things like job control are disabled; the value is unchanged
- otherwise. Returns -1 in the case of an error, 0 in the case that
- the file was not found, and 1 if the file was found and executed. */
-maybe_execute_file (fname, force_noninteractive)
- char *fname;
- int force_noninteractive;
+/* Fetch the current set of uids and gids and return 1 if we're running
+ setuid or setgid. */
+static int
+uidget ()
{
- jmp_buf old_return_catch;
- int return_val, fd, tresult, old_interactive;
- char *filename, *string;
- struct stat file_info;
-
- filename = tilde_expand (fname);
- fd = open (filename, O_RDONLY);
+ uid_t u;
- if (fd < 0)
+ u = getuid ();
+ if (current_user.uid != u)
{
-file_error_and_exit:
- if (errno != ENOENT)
- file_error (filename);
- free (filename);
- return ((errno == ENOENT) ? 0 : -1);
+ FREE (current_user.user_name);
+ FREE (current_user.shell);
+ FREE (current_user.home_dir);
+ current_user.user_name = current_user.shell = current_user.home_dir = (char *)NULL;
}
+ current_user.uid = u;
+ current_user.gid = getgid ();
+ current_user.euid = geteuid ();
+ current_user.egid = getegid ();
- if (fstat (fd, &file_info) == -1)
- goto file_error_and_exit;
+ /* See whether or not we are running setuid or setgid. */
+ return (current_user.uid != current_user.euid) ||
+ (current_user.gid != current_user.egid);
+}
+
+void
+disable_priv_mode ()
+{
+ int e;
- if (S_ISDIR (file_info.st_mode))
+#if HAVE_SETRESUID
+ if (setresuid (current_user.uid, current_user.uid, current_user.uid) < 0)
+#else
+ if (setuid (current_user.uid) < 0)
+#endif
{
- internal_error ("%s: cannot execute directories", filename);
- free (filename);
- return -1;
+ e = errno;
+ sys_error (_("cannot set uid to %d: effective uid %d"), current_user.uid, current_user.euid);
+#if defined (EXIT_ON_SETUID_FAILURE)
+ if (e == EAGAIN)
+ exit (e);
+#endif
}
+#if HAVE_SETRESGID
+ if (setresgid (current_user.gid, current_user.gid, current_user.gid) < 0)
+#else
+ if (setgid (current_user.gid) < 0)
+#endif
+ sys_error (_("cannot set gid to %d: effective gid %d"), current_user.gid, current_user.egid);
+
+ current_user.euid = current_user.uid;
+ current_user.egid = current_user.gid;
+}
- string = (char *)xmalloc (1 + (int)file_info.st_size);
- tresult = read (fd, string, file_info.st_size);
+#if defined (WORDEXP_OPTION)
+static int
+run_wordexp (words)
+ char *words;
+{
+ int code, nw, nb;
+ WORD_LIST *wl, *tl, *result;
- {
- int tt = errno;
- close (fd);
- errno = tt;
- }
+ code = setjmp_nosigs (top_level);
- if (tresult != file_info.st_size)
+ if (code != NOT_JUMPED)
{
- free (string);
- goto file_error_and_exit;
+ switch (code)
+ {
+ /* Some kind of throw to top_level has occurred. */
+ case FORCE_EOF:
+ return last_command_exit_value = 127;
+ case ERREXIT:
+ case EXITPROG:
+ case EXITBLTIN:
+ return last_command_exit_value;
+ case DISCARD:
+ return last_command_exit_value = 1;
+ default:
+ command_error ("run_wordexp", CMDERR_BADJUMP, code, 0);
+ }
}
- string[file_info.st_size] = '\0';
-
- return_catch_flag++;
- xbcopy ((char *)return_catch, (char *)old_return_catch, sizeof (jmp_buf));
- if (force_noninteractive)
+ /* Run it through the parser to get a list of words and expand them */
+ if (words && *words)
{
- old_interactive = interactive;
- interactive = 0;
+ with_input_from_string (words, "--wordexp");
+ if (parse_command () != 0)
+ return (126);
+ if (global_command == 0)
+ {
+ printf ("0\n0\n");
+ return (0);
+ }
+ if (global_command->type != cm_simple)
+ return (126);
+ wl = global_command->value.Simple->words;
+ if (protected_mode)
+ for (tl = wl; tl; tl = tl->next)
+ tl->word->flags |= W_NOCOMSUB|W_NOPROCSUB;
+ result = wl ? expand_words_no_vars (wl) : (WORD_LIST *)0;
}
-
- return_val = setjmp (return_catch);
-
- /* If `return' was seen outside of a function, but in the script, then
- force parse_and_execute () to clean up. */
- if (return_val)
- parse_and_execute_cleanup ();
else
- tresult = parse_and_execute (string, filename, -1);
+ result = (WORD_LIST *)0;
- if (force_noninteractive)
- interactive = old_interactive;
+ last_command_exit_value = 0;
- return_catch_flag--;
- xbcopy ((char *)old_return_catch, (char *)return_catch, sizeof (jmp_buf));
+ if (result == 0)
+ {
+ printf ("0\n0\n");
+ return (0);
+ }
- free (filename);
+ /* Count up the number of words and bytes, and print them. Don't count
+ the trailing NUL byte. */
+ for (nw = nb = 0, wl = result; wl; wl = wl->next)
+ {
+ nw++;
+ nb += strlen (wl->word->word);
+ }
+ printf ("%u\n%u\n", nw, nb);
+ /* Print each word on a separate line. This will have to be changed when
+ the interface to glibc is completed. */
+ for (wl = result; wl; wl = wl->next)
+ printf ("%s\n", wl->word->word);
- return (1);
+ return (0);
}
+#endif
#if defined (ONESHOT)
/* Run one command, given as the argument to the -c option. Tell
parse_and_execute not to fork for a simple command. */
+static int
run_one_command (command)
char *command;
{
int code;
- code = setjmp (top_level);
+ code = setjmp_nosigs (top_level);
if (code != NOT_JUMPED)
{
#endif /* PROCESS_SUBSTITUTION */
switch (code)
{
- /* Some kind of throw to top_level has occured. */
+ /* Some kind of throw to top_level has occurred. */
case FORCE_EOF:
return last_command_exit_value = 127;
+ case ERREXIT:
case EXITPROG:
+ case EXITBLTIN:
return last_command_exit_value;
case DISCARD:
return last_command_exit_value = 1;
default:
- programming_error ("Bad jump %d", code);
+ command_error ("run_one_command", CMDERR_BADJUMP, code, 0);
}
}
- return (parse_and_execute (savestring (command), "-c", -1));
+ return (parse_and_execute (savestring (command), "-c", SEVAL_NOHIST|SEVAL_RESETLINE));
}
#endif /* ONESHOT */
-reader_loop ()
+static int
+bind_args (argv, arg_start, arg_end, start_index)
+ char **argv;
+ int arg_start, arg_end, start_index;
{
- int our_indirection_level;
- COMMAND *current_command = (COMMAND *)NULL;
-
- our_indirection_level = ++indirection_level;
+ register int i;
+ WORD_LIST *args, *tl;
- while (!EOF_Reached)
+ for (i = arg_start, args = tl = (WORD_LIST *)NULL; i < arg_end; i++)
{
- int code;
-
- code = setjmp (top_level);
+ if (args == 0)
+ args = tl = make_word_list (make_word (argv[i]), args);
+ else
+ {
+ tl->next = make_word_list (make_word (argv[i]), (WORD_LIST *)NULL);
+ tl = tl->next;
+ }
+ }
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
- if (interactive_shell && signal_is_ignored (SIGINT) == 0)
- set_signal_handler (SIGINT, sigint_sighandler);
-
- if (code != NOT_JUMPED)
+ if (args)
+ {
+ if (start_index == 0) /* bind to $0...$n for sh -c command */
{
- indirection_level = our_indirection_level;
-
- switch (code)
+ /* Posix.2 4.56.3 says that the first argument after sh -c command
+ becomes $0, and the rest of the arguments become $1...$n */
+ shell_name = savestring (args->word->word);
+ FREE (dollar_vars[0]);
+ dollar_vars[0] = savestring (args->word->word);
+ remember_args (args->next, 1);
+ if (debugging_mode)
{
- /* Some kind of throw to top_level has occured. */
- case FORCE_EOF:
- case EXITPROG:
- current_command = (COMMAND *)NULL;
- EOF_Reached = EOF;
- goto exec_done;
-
- case DISCARD:
- /* Obstack free command elements, etc. */
- if (current_command)
- {
- dispose_command (current_command);
- current_command = (COMMAND *)NULL;
- }
- last_command_exit_value = 1;
- break;
-
- default:
- programming_error ("Bad jump %d", code);
+ push_args (args->next); /* BASH_ARGV and BASH_ARGC */
+ bash_argv_initialized = 1;
}
}
+ else /* bind to $1...$n for shell script */
+ {
+ remember_args (args, 1);
+ /* We do this unconditionally so something like -O extdebug doesn't
+ do it first. We're setting the definitive positional params
+ here. */
+ if (debugging_mode)
+ {
+ push_args (args); /* BASH_ARGV and BASH_ARGC */
+ bash_argv_initialized = 1;
+ }
+ }
+
+ dispose_words (args);
+ }
+
+ return (i);
+}
+
+void
+unbind_args ()
+{
+ remember_args ((WORD_LIST *)NULL, 1);
+ pop_args (); /* Reset BASH_ARGV and BASH_ARGC */
+}
- executing = 0;
- dispose_used_env_vars ();
+static void
+start_debugger ()
+{
+#if defined (DEBUGGER) && defined (DEBUGGER_START_FILE)
+ int old_errexit;
+ int r;
+
+ old_errexit = exit_immediately_on_error;
+ exit_immediately_on_error = 0;
+
+ r = force_execute_file (DEBUGGER_START_FILE, 1);
+ if (r < 0)
+ {
+ internal_warning (_("cannot start debugger; debugging mode disabled"));
+ debugging_mode = 0;
+ }
+ error_trace_mode = function_trace_mode = debugging_mode;
+
+ set_shellopts ();
+ set_bashopts ();
-#if (defined (Ultrix) && defined (mips)) || !defined (HAVE_ALLOCA)
- /* Attempt to reclaim memory allocated with alloca (). */
- (void) alloca (0);
+ exit_immediately_on_error += old_errexit;
#endif
+}
- if (read_command () == 0)
+static int
+open_shell_script (script_name)
+ char *script_name;
+{
+ int fd, e, fd_is_tty;
+ char *filename, *path_filename, *t;
+ char sample[80];
+ int sample_len;
+ struct stat sb;
+#if defined (ARRAY_VARS)
+ SHELL_VAR *funcname_v, *bash_source_v, *bash_lineno_v;
+ ARRAY *funcname_a, *bash_source_a, *bash_lineno_a;
+#endif
+
+ filename = savestring (script_name);
+
+ fd = open (filename, O_RDONLY);
+ if ((fd < 0) && (errno == ENOENT) && (absolute_program (filename) == 0))
+ {
+ e = errno;
+ /* If it's not in the current directory, try looking through PATH
+ for it. */
+ path_filename = find_path_file (script_name);
+ if (path_filename)
{
- if (global_command)
- {
- current_command = global_command;
+ free (filename);
+ filename = path_filename;
+ fd = open (filename, O_RDONLY);
+ }
+ else
+ errno = e;
+ }
- current_command_number++;
+ if (fd < 0)
+ {
+ e = errno;
+ file_error (filename);
+#if defined (JOB_CONTROL)
+ end_job_control (); /* just in case we were run as bash -i script */
+#endif
+ sh_exit ((e == ENOENT) ? EX_NOTFOUND : EX_NOINPUT);
+ }
- /* POSIX spec: "-n: The shell reads commands but does
- not execute them; this can be used to check for shell
- script syntax errors. The shell ignores the -n option
- for interactive shells. " */
- if (interactive_shell || !read_but_dont_execute)
- {
- executing = 1;
- execute_command (current_command);
- }
+ free (dollar_vars[0]);
+ dollar_vars[0] = exec_argv0 ? savestring (exec_argv0) : savestring (script_name);
+ if (exec_argv0)
+ {
+ free (exec_argv0);
+ exec_argv0 = (char *)NULL;
+ }
- exec_done:
- if (current_command)
- {
- dispose_command (current_command);
- current_command = (COMMAND *)NULL;
- }
- QUIT;
+ if (file_isdir (filename))
+ {
+#if defined (EISDIR)
+ errno = EISDIR;
+#else
+ errno = EINVAL;
+#endif
+ file_error (filename);
+#if defined (JOB_CONTROL)
+ end_job_control (); /* just in case we were run as bash -i script */
+#endif
+ sh_exit (EX_NOINPUT);
+ }
+
+#if defined (ARRAY_VARS)
+ GET_ARRAY_FROM_VAR ("FUNCNAME", funcname_v, funcname_a);
+ GET_ARRAY_FROM_VAR ("BASH_SOURCE", bash_source_v, bash_source_a);
+ GET_ARRAY_FROM_VAR ("BASH_LINENO", bash_lineno_v, bash_lineno_a);
+
+ array_push (bash_source_a, filename);
+ if (bash_lineno_a)
+ {
+ t = itos (executing_line_number ());
+ array_push (bash_lineno_a, t);
+ free (t);
+ }
+ array_push (funcname_a, "main");
+#endif
+
+#ifdef HAVE_DEV_FD
+ fd_is_tty = isatty (fd);
+#else
+ fd_is_tty = 0;
+#endif
+
+ /* Only do this with non-tty file descriptors we can seek on. */
+ if (fd_is_tty == 0 && (lseek (fd, 0L, 1) != -1))
+ {
+ /* Check to see if the `file' in `bash file' is a binary file
+ according to the same tests done by execute_simple_command (),
+ and report an error and exit if it is. */
+ sample_len = read (fd, sample, sizeof (sample));
+ if (sample_len < 0)
+ {
+ e = errno;
+ if ((fstat (fd, &sb) == 0) && S_ISDIR (sb.st_mode))
+ {
+#if defined (EISDIR)
+ errno = EISDIR;
+ file_error (filename);
+#else
+ internal_error (_("%s: Is a directory"), filename);
+#endif
}
+ else
+ {
+ errno = e;
+ file_error (filename);
+ }
+#if defined (JOB_CONTROL)
+ end_job_control (); /* just in case we were run as bash -i script */
+#endif
+ exit (EX_NOEXEC);
}
- else
+ else if (sample_len > 0 && (check_binary_file (sample, sample_len)))
{
- /* Parse error, maybe discard rest of stream if not interactive. */
- if (!interactive)
- EOF_Reached = EOF;
+ internal_error (_("%s: cannot execute binary file"), filename);
+#if defined (JOB_CONTROL)
+ end_job_control (); /* just in case we were run as bash -i script */
+#endif
+ exit (EX_BINARY_FILE);
}
- if (just_one_command)
- EOF_Reached = EOF;
+ /* Now rewind the file back to the beginning. */
+ lseek (fd, 0L, 0);
}
- indirection_level--;
-}
-/* Return a string denoting what our indirection level is. */
-static char indirection_string[100];
+ /* Open the script. But try to move the file descriptor to a randomly
+ large one, in the hopes that any descriptors used by the script will
+ not match with ours. */
+ fd = move_to_high_fd (fd, 1, -1);
-char *
-indirection_level_string ()
-{
- register int i, j;
- char *ps4;
+#if defined (BUFFERED_INPUT)
+ default_buffered_input = fd;
+ SET_CLOSE_ON_EXEC (default_buffered_input);
+#else /* !BUFFERED_INPUT */
+ default_input = fdopen (fd, "r");
- indirection_string[0] = '\0';
- ps4 = get_string_value ("PS4");
+ if (default_input == 0)
+ {
+ file_error (filename);
+ exit (EX_NOTFOUND);
+ }
- if (ps4 == 0 || *ps4 == '\0')
- return (indirection_string);
-
- ps4 = decode_prompt_string (ps4);
+ SET_CLOSE_ON_EXEC (fd);
+ if (fileno (default_input) != fd)
+ SET_CLOSE_ON_EXEC (fileno (default_input));
+#endif /* !BUFFERED_INPUT */
- for (i = 0; *ps4 && i < indirection_level && i < 99; i++)
- indirection_string[i] = *ps4;
+ /* Just about the only way for this code to be executed is if something
+ like `bash -i /dev/stdin' is executed. */
+ if (interactive_shell && fd_is_tty)
+ {
+ dup2 (fd, 0);
+ close (fd);
+ fd = 0;
+#if defined (BUFFERED_INPUT)
+ default_buffered_input = 0;
+#else
+ fclose (default_input);
+ default_input = stdin;
+#endif
+ }
+ else if (forced_interactive && fd_is_tty == 0)
+ /* But if a script is called with something like `bash -i scriptname',
+ we need to do a non-interactive setup here, since we didn't do it
+ before. */
+ init_interactive_script ();
- for (j = 1; *ps4 && ps4[j] && i < 99; i++, j++)
- indirection_string[i] = ps4[j];
+ free (filename);
- indirection_string[i] = '\0';
- free (ps4);
- return (indirection_string);
+ reading_shell_script = 1;
+ return (fd);
}
-static sighandler
-alrm_catcher(i)
- int i;
+/* Initialize the input routines for the parser. */
+static void
+set_bash_input ()
{
- printf ("%ctimed out waiting for input: auto-logout\n", '\07');
- longjmp (top_level, EXITPROG);
-#if !defined (VOID_SIGHANDLER)
- return (0);
-#endif /* !VOID_SIGHANDLER */
+ /* Make sure the fd from which we are reading input is not in
+ no-delay mode. */
+#if defined (BUFFERED_INPUT)
+ if (interactive == 0)
+ sh_unset_nodelay_mode (default_buffered_input);
+ else
+#endif /* !BUFFERED_INPUT */
+ sh_unset_nodelay_mode (fileno (stdin));
+
+ /* with_input_from_stdin really means `with_input_from_readline' */
+ if (interactive && no_line_editing == 0)
+ with_input_from_stdin ();
+#if defined (BUFFERED_INPUT)
+ else if (interactive == 0)
+ with_input_from_buffered_stream (default_buffered_input, dollar_vars[0]);
+#endif /* BUFFERED_INPUT */
+ else
+ with_input_from_stream (default_input, dollar_vars[0]);
}
-parse_command ()
+/* Close the current shell script input source and forget about it. This is
+ extern so execute_cmd.c:initialize_subshell() can call it. If CHECK_ZERO
+ is non-zero, we close default_buffered_input even if it's the standard
+ input (fd 0). */
+void
+unset_bash_input (check_zero)
+ int check_zero;
{
- int r;
+#if defined (BUFFERED_INPUT)
+ if ((check_zero && default_buffered_input >= 0) ||
+ (check_zero == 0 && default_buffered_input > 0))
+ {
+ close_buffered_fd (default_buffered_input);
+ default_buffered_input = bash_input.location.buffered_fd = -1;
+ bash_input.type = st_none; /* XXX */
+ }
+#else /* !BUFFERED_INPUT */
+ if (default_input)
+ {
+ fclose (default_input);
+ default_input = (FILE *)NULL;
+ }
+#endif /* !BUFFERED_INPUT */
+}
+
+
+#if !defined (PROGRAM)
+# define PROGRAM "bash"
+#endif
- need_here_doc = 0;
- run_pending_traps ();
+static void
+set_shell_name (argv0)
+ char *argv0;
+{
+ /* Here's a hack. If the name of this shell is "sh", then don't do
+ any startup files; just try to be more like /bin/sh. */
+ shell_name = argv0 ? base_pathname (argv0) : PROGRAM;
- /* Allow the execution of a random command just before the printing
- of each primary prompt. If the shell variable PROMPT_COMMAND
- is set then the value of it is the command to execute. */
- if (interactive && bash_input.type != st_string)
+ if (argv0 && *argv0 == '-')
{
- char *command_to_execute;
-
- command_to_execute = get_string_value ("PROMPT_COMMAND");
- if (command_to_execute)
- execute_prompt_command (command_to_execute);
+ if (*shell_name == '-')
+ shell_name++;
+ login_shell = 1;
}
- current_command_line_count = 0;
- r = yyparse ();
+ if (shell_name[0] == 's' && shell_name[1] == 'h' && shell_name[2] == '\0')
+ act_like_sh++;
+ if (shell_name[0] == 's' && shell_name[1] == 'u' && shell_name[2] == '\0')
+ su_shell++;
- if (need_here_doc)
- gather_here_documents ();
+ shell_name = argv0 ? argv0 : PROGRAM;
+ FREE (dollar_vars[0]);
+ dollar_vars[0] = savestring (shell_name);
- return (r);
+ /* A program may start an interactive shell with
+ "execl ("/bin/bash", "-", NULL)".
+ If so, default the name of this shell to our name. */
+ if (!shell_name || !*shell_name || (shell_name[0] == '-' && !shell_name[1]))
+ shell_name = PROGRAM;
}
-read_command ()
+/* Some options are initialized to -1 so we have a way to determine whether
+ they were set on the command line. This is an issue when listing the option
+ values at invocation (`bash -o'), so we set the defaults here and reset
+ them after the call to list_minus_o_options (). */
+/* XXX - could also do this for histexp_flag, jobs_m_flag */
+static void
+set_option_defaults ()
{
- SHELL_VAR *tmout_var = (SHELL_VAR *)NULL;
- int tmout_len = 0, result;
- SigHandler *old_alrm = (SigHandler *)NULL;
-
- prompt_string_pointer = &ps1_prompt;
- global_command = (COMMAND *)NULL;
-
- /* Only do timeouts if interactive. */
- if (interactive)
- {
- tmout_var = find_variable ("TMOUT");
-
- if (tmout_var && tmout_var->value)
- {
- tmout_len = atoi (tmout_var->value);
- if (tmout_len > 0)
- {
- old_alrm = set_signal_handler (SIGALRM, alrm_catcher);
- alarm (tmout_len);
- }
- }
- }
+#if defined (HISTORY)
+ enable_history_list = 0;
+#endif
+}
- QUIT;
+static void
+reset_option_defaults ()
+{
+#if defined (HISTORY)
+ enable_history_list = -1;
+#endif
+}
- current_command_line_count = 0;
- result = parse_command ();
+static void
+init_interactive ()
+{
+ expand_aliases = expaliases_flag = 1;
+ interactive_shell = startup_state = interactive = 1;
+#if defined (HISTORY)
+ if (enable_history_list == -1)
+ enable_history_list = 1; /* set default */
+ remember_on_history = enable_history_list;
+# if defined (BANG_HISTORY)
+ histexp_flag = history_expansion; /* XXX */
+# endif
+#endif
+}
- if (interactive && tmout_var && (tmout_len > 0))
- {
- alarm(0);
- set_signal_handler (SIGALRM, old_alrm);
- }
- return (result);
+static void
+init_noninteractive ()
+{
+#if defined (HISTORY)
+ if (enable_history_list == -1) /* set default */
+ enable_history_list = 0;
+ bash_history_reinit (0);
+#endif /* HISTORY */
+ interactive_shell = startup_state = interactive = 0;
+ expand_aliases = expaliases_flag = posixly_correct; /* XXX - was 0 not posixly_correct */
+ no_line_editing = 1;
+#if defined (JOB_CONTROL)
+ /* Even if the shell is not interactive, enable job control if the -i or
+ -m option is supplied at startup. */
+ set_job_control (forced_interactive||jobs_m_flag);
+#endif /* JOB_CONTROL */
}
-/* Cause STREAM to buffer lines as opposed to characters or blocks. */
static void
-line_buffer_stream (stream)
- FILE *stream;
+init_interactive_script ()
{
- /* If your machine doesn't have either of setlinebuf or setvbuf,
- you can just comment out the buffering commands, and the shell
- will still work. It will take more cycles, though. */
-#if defined (HAVE_SETLINEBUF)
- setlinebuf (stream);
+#if defined (HISTORY)
+ if (enable_history_list == -1)
+ enable_history_list = 1;
+#endif
+ init_noninteractive ();
+ expand_aliases = expaliases_flag = interactive_shell = startup_state = 1;
+#if defined (HISTORY)
+ remember_on_history = enable_history_list; /* XXX */
+#endif
+}
+
+void
+get_current_user_info ()
+{
+ struct passwd *entry;
+
+ /* Don't fetch this more than once. */
+ if (current_user.user_name == 0)
+ {
+#if defined (__TANDEM)
+ entry = getpwnam (getlogin ());
#else
-# if defined (_IOLBF)
-# if defined (REVERSED_SETVBUF_ARGS)
- setvbuf (stream, _IOLBF, (char *)NULL, BUFSIZ);
-# else /* !REVERSED_SETVBUF_ARGS */
- setvbuf (stream, (char *)NULL, _IOLBF, BUFSIZ);
-# endif /* !REVERSED_SETVBUF_ARGS */
-# endif /* _IOLBF */
-#endif /* !HAVE_SETLINEBUF */
+ entry = getpwuid (current_user.uid);
+#endif
+ if (entry)
+ {
+ current_user.user_name = savestring (entry->pw_name);
+ current_user.shell = (entry->pw_shell && entry->pw_shell[0])
+ ? savestring (entry->pw_shell)
+ : savestring ("/bin/sh");
+ current_user.home_dir = savestring (entry->pw_dir);
+ }
+ else
+ {
+ current_user.user_name = _("I have no name!");
+ current_user.user_name = savestring (current_user.user_name);
+ current_user.shell = savestring ("/bin/sh");
+ current_user.home_dir = savestring ("/");
+ }
+#if defined (HAVE_GETPWENT)
+ endpwent ();
+#endif
+ }
}
/* Do whatever is necessary to initialize the shell.
static void
shell_initialize ()
{
+ char hostname[256];
+ int should_be_restricted;
+
/* Line buffer output for stderr and stdout. */
- line_buffer_stream (stderr);
- line_buffer_stream (stdout);
+ if (shell_initialized == 0)
+ {
+ sh_setlinebuf (stderr);
+ sh_setlinebuf (stdout);
+ }
/* Sort the array of shell builtins so that the binary search in
find_shell_builtin () works correctly. */
for restoring the original default signal handlers. That function
is called when we make a new child. */
initialize_traps ();
- initialize_signals ();
-
- /* Initialize current_user.name and current_host_name. */
- {
- struct passwd *entry = getpwuid (current_user.uid);
- char hostname[256];
-
- if (gethostname (hostname, 255) < 0)
- current_host_name = "??host??";
- else
- current_host_name = savestring (hostname);
+ initialize_signals (0);
- if (entry)
- {
- current_user.user_name = savestring (entry->pw_name);
- if (entry->pw_shell && entry->pw_shell[0])
- current_user.shell = savestring (entry->pw_shell);
- else
- current_user.shell = savestring ("/bin/sh");
- current_user.home_dir = savestring (entry->pw_dir);
- }
- else
- {
- current_user.user_name = savestring ("I have no name!");
- current_user.shell = savestring ("/bin/sh");
- current_user.home_dir = savestring ("/");
- }
+ /* It's highly unlikely that this will change. */
+ if (current_host_name == 0)
+ {
+ /* Initialize current_host_name. */
+ if (gethostname (hostname, 255) < 0)
+ current_host_name = "??host??";
+ else
+ current_host_name = savestring (hostname);
+ }
- endpwent ();
- }
+ /* Initialize the stuff in current_user that comes from the password
+ file. We don't need to do this right away if the shell is not
+ interactive. */
+ if (interactive_shell)
+ get_current_user_info ();
/* Initialize our interface to the tilde expander. */
tilde_initialize ();
- /* Initialize internal and environment variables. */
- initialize_shell_variables (shell_environment);
+#if defined (RESTRICTED_SHELL)
+ should_be_restricted = shell_is_restricted (shell_name);
+#endif
- /* Initialize filename hash tables. */
- initialize_filename_hashing ();
+ /* Initialize internal and environment variables. Don't import shell
+ functions from the environment if we are running in privileged or
+ restricted mode or if the shell is running setuid. */
+#if defined (RESTRICTED_SHELL)
+ initialize_shell_variables (shell_environment, privileged_mode||restricted||should_be_restricted||running_setuid);
+#else
+ initialize_shell_variables (shell_environment, privileged_mode||running_setuid);
+#endif
/* Initialize the data structures for storing and running jobs. */
- initialize_jobs ();
+ initialize_job_control (jobs_m_flag);
/* Initialize input streams to null. */
initialize_bash_input ();
+
+ initialize_flags ();
+
+ /* Initialize the shell options. Don't import the shell options
+ from the environment variables $SHELLOPTS or $BASHOPTS if we are
+ running in privileged or restricted mode or if the shell is running
+ setuid. */
+#if defined (RESTRICTED_SHELL)
+ initialize_shell_options (privileged_mode||restricted||should_be_restricted||running_setuid);
+ initialize_bashopts (privileged_mode||restricted||should_be_restricted||running_setuid);
+#else
+ initialize_shell_options (privileged_mode||running_setuid);
+ initialize_bashopts (privileged_mode||running_setuid);
+#endif
}
/* Function called by main () when it appears that the shell has already
/* Things that get 0. */
login_shell = make_login_shell = interactive = executing = 0;
debugging = do_version = line_number = last_command_exit_value = 0;
- forced_interactive = interactive_shell = subshell_environment = 0;
+ forced_interactive = interactive_shell = 0;
+ subshell_environment = running_in_background = 0;
+ expand_aliases = expaliases_flag = 0;
+ bash_argv_initialized = 0;
+
+ /* XXX - should we set jobs_m_flag to 0 here? */
#if defined (HISTORY)
-# if defined (BANG_HISTORY)
- history_expansion = 0;
-# endif
- remember_on_history = 0;
+ bash_history_reinit (enable_history_list = 0);
#endif /* HISTORY */
#if defined (RESTRICTED_SHELL)
/* Ensure that the default startup file is used. (Except that we don't
execute this file for reinitialized shells). */
- bashrc_file = "~/.bashrc";
+ bashrc_file = DEFAULT_BASHRC;
/* Delete all variables and functions. They will be reinitialized when
the environment is parsed. */
-
- delete_all_variables (shell_variables);
+ delete_all_contexts (shell_variables);
delete_all_variables (shell_functions);
- /* Pretend the PATH variable has changed. */
- sv_path ("PATH");
-}
-
-static void
-initialize_signals ()
-{
- initialize_terminating_signals ();
- initialize_job_signals ();
-#if defined (INITIALIZE_SIGLIST)
- initialize_siglist ();
-#endif
-}
+ reinit_special_variables ();
-void
-reinitialize_signals ()
-{
- initialize_terminating_signals ();
- initialize_job_signals ();
-}
-
-/* A structure describing a signal that terminates the shell if not
- caught. The orig_handler member is present so children can reset
- these signals back to their original handlers. */
-struct termsig {
- int signum;
- SigHandler *orig_handler;
-};
-
-#define NULL_HANDLER (SigHandler *)SIG_DFL
-
-/* The list of signals that would terminate the shell if not caught.
- We catch them, but just so that we can write the history file,
- and so forth. */
-static struct termsig terminating_signals[] = {
-#ifdef SIGHUP
- SIGHUP, NULL_HANDLER,
-#endif
-
-#ifdef SIGINT
- SIGINT, NULL_HANDLER,
-#endif
-
-#ifdef SIGILL
- SIGILL, NULL_HANDLER,
-#endif
-
-#ifdef SIGTRAP
- SIGTRAP, NULL_HANDLER,
-#endif
-
-#ifdef SIGIOT
- SIGIOT, NULL_HANDLER,
-#endif
-
-#ifdef SIGDANGER
- SIGDANGER, NULL_HANDLER,
-#endif
-
-#ifdef SIGEMT
- SIGEMT, NULL_HANDLER,
-#endif
-
-#ifdef SIGFPE
- SIGFPE, NULL_HANDLER,
-#endif
-
-#ifdef SIGBUS
- SIGBUS, NULL_HANDLER,
-#endif
-
-#ifdef SIGSEGV
- SIGSEGV, NULL_HANDLER,
-#endif
-
-#ifdef SIGSYS
- SIGSYS, NULL_HANDLER,
-#endif
-
-#ifdef SIGPIPE
- SIGPIPE, NULL_HANDLER,
-#endif
-
-#ifdef SIGALRM
- SIGALRM, NULL_HANDLER,
-#endif
-
-#ifdef SIGTERM
- SIGTERM, NULL_HANDLER,
-#endif
-
-#ifdef SIGXCPU
- SIGXCPU, NULL_HANDLER,
-#endif
-
-#ifdef SIGXFSZ
- SIGXFSZ, NULL_HANDLER,
-#endif
-
-#ifdef SIGVTALRM
- SIGVTALRM, NULL_HANDLER,
-#endif
-
-#ifdef SIGPROF
- SIGPROF, NULL_HANDLER,
-#endif
-
-#ifdef SIGLOST
- SIGLOST, NULL_HANDLER,
-#endif
-
-#ifdef SIGUSR1
- SIGUSR1, NULL_HANDLER,
-#endif
-
-#ifdef SIGUSR2
- SIGUSR2, NULL_HANDLER,
+#if defined (READLINE)
+ bashline_reinitialize ();
#endif
-};
-
-#define TERMSIGS_LENGTH (sizeof (terminating_signals) / sizeof (struct termsig))
-
-#define XSIG(x) (terminating_signals[x].signum)
-#define XHANDLER(x) (terminating_signals[x].orig_handler)
-
-/* This function belongs here? */
-sighandler
-termination_unwind_protect (sig)
- int sig;
-{
- if (sig == SIGINT && signal_is_trapped (SIGINT))
- run_interrupt_trap ();
-
-#if defined (HISTORY)
- if (interactive_shell)
- maybe_save_shell_history ();
-#endif /* HISTORY */
-
-#if defined (JOB_CONTROL)
- if (interactive && sig == SIGHUP)
- hangup_all_jobs ();
- end_job_control ();
-#endif /* JOB_CONTROL */
-
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
- run_exit_trap ();
- set_signal_handler (sig, SIG_DFL);
- kill (getpid (), sig);
-
-#if !defined (VOID_SIGHANDLER)
- return (0);
-#endif /* VOID_SIGHANDLER */
+ shell_reinitialized = 1;
}
-/* Initialize signals that will terminate the shell to do some
- unwind protection. */
static void
-initialize_terminating_signals ()
-{
- register int i;
-
- /* The following code is to avoid an expensive call to
- set_signal_handler () for each terminating_signals. Fortunately,
- this is possible in Posix. Unfortunately, we have to call signal ()
- on non-Posix systems for each signal in terminating_signals. */
-#if defined (_POSIX_VERSION)
- struct sigaction act, oact;
-
- act.sa_handler = termination_unwind_protect;
- act.sa_flags = 0;
- sigemptyset (&act.sa_mask);
- sigemptyset (&oact.sa_mask);
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- sigaddset (&act.sa_mask, XSIG (i));
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- sigaction (XSIG (i), &act, &oact);
- terminating_signals[i].orig_handler = oact.sa_handler;
- /* Don't do anything with signals that are ignored at shell entry
- if the shell is not interactive. */
- if (!interactive_shell && oact.sa_handler == SIG_IGN)
- {
- sigaction (XSIG (i), &oact, &act);
- set_signal_ignored (XSIG (i));
- }
- }
-
-#else /* !_POSIX_VERSION */
-
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- terminating_signals[i].orig_handler =
- set_signal_handler (XSIG (i), termination_unwind_protect);
- /* Don't do anything with signals that are ignored at shell entry
- if the shell is not interactive. */
- if (!interactive_shell && terminating_signals[i].orig_handler == SIG_IGN)
- {
- set_signal_handler (XSIG (i), SIG_IGN);
- set_signal_ignored (XSIG (i));
- }
- }
-
-#endif /* !_POSIX_VERSION */
-
-#if defined (JOB_CONTROL) || defined (_POSIX_VERSION)
- /* All shells use the signal mask they inherit, and pass it along
- to child processes. Children will never block SIGCHLD, though. */
- sigemptyset (&top_level_mask);
- sigprocmask (SIG_BLOCK, (sigset_t *)NULL, &top_level_mask);
- sigdelset (&top_level_mask, SIGCHLD);
-#endif /* JOB_CONTROL || _POSIX_VERSION */
-
- /* And, some signals that are specifically ignored by the shell. */
- set_signal_handler (SIGQUIT, SIG_IGN);
-
- if (interactive)
- {
- set_signal_handler (SIGINT, sigint_sighandler);
- set_signal_handler (SIGTERM, SIG_IGN);
- }
-}
-
-void
-reset_terminating_signals ()
+show_shell_usage (fp, extra)
+ FILE *fp;
+ int extra;
{
- register int i;
-
-#if defined (_POSIX_VERSION)
- struct sigaction act;
-
- act.sa_flags = 0;
- sigemptyset (&act.sa_mask);
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- /* Skip a signal if it's trapped or handled specially, because the
- trap code will restore the correct value. */
- if (signal_is_trapped (XSIG (i)) || signal_is_special (XSIG (i)))
- continue;
-
- act.sa_handler = XHANDLER (i);
- sigaction (XSIG (i), &act, (struct sigaction *) NULL);
- }
-#else
- for (i = 0; i < TERMSIGS_LENGTH; i++)
- {
- if (signal_is_trapped (XSIG (i)) || signal_is_special (XSIG (i)))
- continue;
-
- set_signal_handler (XSIG (i), XHANDLER (i));
- }
-#endif
-}
-#undef XSIG
-#undef XHANDLER
-
-/* What to do when we've been interrupted, and it is safe to handle it. */
-void
-throw_to_top_level ()
-{
- int print_newline = 0;
+ int i;
+ char *set_opts, *s, *t;
+
+ if (extra)
+ fprintf (fp, _("GNU bash, version %s-(%s)\n"), shell_version_string (), MACHTYPE);
+ fprintf (fp, _("Usage:\t%s [GNU long option] [option] ...\n\t%s [GNU long option] [option] script-file ...\n"),
+ shell_name, shell_name);
+ fputs (_("GNU long options:\n"), fp);
+ for (i = 0; long_args[i].name; i++)
+ fprintf (fp, "\t--%s\n", long_args[i].name);
+
+ fputs (_("Shell options:\n"), fp);
+ fputs (_("\t-ilrsD or -c command or -O shopt_option\t\t(invocation only)\n"), fp);
+
+ for (i = 0, set_opts = 0; shell_builtins[i].name; i++)
+ if (STREQ (shell_builtins[i].name, "set"))
+ {
+ set_opts = savestring (shell_builtins[i].short_doc);
+ break;
+ }
- if (interrupt_state)
+ if (set_opts)
{
- print_newline = 1;
- interrupt_state--;
+ s = strchr (set_opts, '[');
+ if (s == 0)
+ s = set_opts;
+ while (*++s == '-')
+ ;
+ t = strchr (s, ']');
+ if (t)
+ *t = '\0';
+ fprintf (fp, _("\t-%s or -o option\n"), s);
+ free (set_opts);
}
- if (interrupt_state)
- return;
-
- last_command_exit_value |= 128;
-
- /* Run any traps set on SIGINT. */
- run_interrupt_trap ();
-
- /* Cleanup string parser environment. */
- while (parse_and_execute_level)
- parse_and_execute_cleanup ();
-
-#if defined (JOB_CONTROL)
- give_terminal_to (shell_pgrp);
-#endif /* JOB_CONTROL */
-
-#if defined (JOB_CONTROL) || defined (_POSIX_VERSION)
- sigprocmask (SIG_SETMASK, &top_level_mask, (sigset_t *)NULL);
-#endif
-
- reset_parser ();
-
-#if defined (READLINE)
- if (interactive)
- bashline_reinitialize ();
-#endif /* READLINE */
-
-#if defined (PROCESS_SUBSTITUTION)
- unlink_fifo_list ();
-#endif /* PROCESS_SUBSTITUTION */
-
- run_unwind_protects ();
- loop_level = continuing = breaking = 0;
- return_catch_flag = 0;
-
- if (interactive && print_newline)
+ if (extra)
{
- fflush (stdout);
- fprintf (stderr, "\n");
- fflush (stderr);
+ fprintf (fp, _("Type `%s -c \"help set\"' for more information about shell options.\n"), shell_name);
+ fprintf (fp, _("Type `%s -c help' for more information about shell builtin commands.\n"), shell_name);
+ fprintf (fp, _("Use the `bashbug' command to report bugs.\n"));
+ fprintf (fp, "\n");
+ fprintf (fp, _("bash home page: <http://www.gnu.org/software/bash>\n"));
+ fprintf (fp, _("General help using GNU software: <http://www.gnu.org/gethelp/>\n"));
}
-
- /* An interrupted `wait' command in a script does not exit the script. */
- if (interactive || (interactive_shell && !shell_initialized) ||
- (print_newline && signal_is_trapped (SIGINT)))
- longjmp (top_level, DISCARD);
- else
- longjmp (top_level, EXITPROG);
}
-/* When non-zero, we throw_to_top_level (). */
-int interrupt_immediately = 0;
-
-/* What we really do when SIGINT occurs. */
-sighandler
-sigint_sighandler (sig)
- int sig;
+static void
+add_shopt_to_alist (opt, on_or_off)
+ char *opt;
+ int on_or_off;
{
-#if defined (USG) && !defined (_POSIX_VERSION)
- set_signal_handler (sig, sigint_sighandler);
-#endif
-
- /* interrupt_state needs to be set for the stack of interrupts to work
- right. Should it be set unconditionally? */
- if (!interrupt_state)
- interrupt_state++;
-
- if (interrupt_immediately)
+ if (shopt_ind >= shopt_len)
{
- interrupt_immediately = 0;
- throw_to_top_level ();
+ shopt_len += 8;
+ shopt_alist = (STRING_INT_ALIST *)xrealloc (shopt_alist, shopt_len * sizeof (shopt_alist[0]));
}
-#if !defined (VOID_SIGHANDLER)
- return (0);
-#endif /* VOID_SIGHANDLER */
-}
-
-/* Give version information about this shell. */
-char *
-shell_version_string ()
-{
- static char tt[16] = { '\0' };
-
- if (!tt[0])
- sprintf (tt, "%s.%d(%d)", dist_version, patch_level, build_version);
- return tt;
+ shopt_alist[shopt_ind].word = opt;
+ shopt_alist[shopt_ind].token = on_or_off;
+ shopt_ind++;
}
-void
-show_shell_version ()
-{
- printf ("GNU %s, version %s\n", base_pathname (shell_name),
- shell_version_string ());
-}
-
-#if !defined (USG) && defined (ENOTSOCK)
-# if !defined (HAVE_SOCKETS)
-# define HAVE_SOCKETS
-# endif
-#endif
-
-#if defined (HAVE_SOCKETS)
-#include <sys/socket.h>
-#endif
-
-/* Is FD a socket or network connection? */
-static int
-isnetconn (fd)
- int fd;
+static void
+run_shopt_alist ()
{
-#if defined (USGr4) || defined (USGr4_2)
- /* Sockets on SVR4 and SVR4.2 are character special (streams) devices. */
- struct stat sb;
-
- if (fstat (fd, &sb) < 0)
- return (0);
- return (S_ISCHR (sb.st_mode));
-#else /* !USGr4 && !USGr4_2 */
-# if defined (HAVE_SOCKETS)
- int rv, l;
- struct sockaddr sa;
-
- l = sizeof(sa);
- rv = getpeername(0, &sa, &l);
- return ((rv < 0 && errno == ENOTSOCK) ? 0 : 1);
-# else /* !HAVE_SOCKETS */
-# if defined (S_ISSOCK)
- struct stat sb;
+ register int i;
- if (fstat (fd, &sb) < 0)
- return (0);
- return (S_ISSOCK (sb.st_mode));
-# else /* !S_ISSOCK */
- return (0);
-# endif /* !S_ISSOCK */
-# endif /* !HAVE_SOCKETS */
-#endif /* !USGr4 && !USGr4_2 */
+ for (i = 0; i < shopt_ind; i++)
+ if (shopt_setopt (shopt_alist[i].word, (shopt_alist[i].token == '-')) != EXECUTION_SUCCESS)
+ exit (EX_BADUSAGE);
+ free (shopt_alist);
+ shopt_alist = 0;
+ shopt_ind = shopt_len = 0;
}
projects / thirdparty / bash.git / blobdiff