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726f6388 JA |
1 | /* shell.h -- The data structures used by the shell */ |
2 | ||
3 | /* Copyright (C) 1993 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
7 | Bash is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9 | Software Foundation; either version 2, or (at your option) any later | |
10 | version. | |
11 | ||
12 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License along | |
18 | with Bash; see the file COPYING. If not, write to the Free Software | |
bb70624e | 19 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
726f6388 JA |
20 | |
21 | #include "config.h" | |
ccc6cda3 JA |
22 | |
23 | #include "bashjmp.h" | |
24 | ||
726f6388 JA |
25 | #include "command.h" |
26 | #include "general.h" | |
27 | #include "error.h" | |
28 | #include "variables.h" | |
29 | #include "quit.h" | |
30 | #include "maxpath.h" | |
31 | #include "unwind_prot.h" | |
32 | #include "dispose_cmd.h" | |
33 | #include "make_cmd.h" | |
34 | #include "subst.h" | |
ccc6cda3 JA |
35 | #include "sig.h" |
36 | #include "pathnames.h" | |
726f6388 JA |
37 | #include "externs.h" |
38 | ||
39 | extern int EOF_Reached; | |
40 | ||
41 | #define NO_PIPE -1 | |
42 | #define REDIRECT_BOTH -2 | |
43 | #define IS_DESCRIPTOR -1 | |
44 | ||
45 | #define NO_VARIABLE -1 | |
46 | ||
726f6388 JA |
47 | /* Values that can be returned by execute_command (). */ |
48 | #define EXECUTION_FAILURE 1 | |
49 | #define EXECUTION_SUCCESS 0 | |
50 | ||
51 | /* Usage messages by builtins result in a return status of 2. */ | |
ccc6cda3 JA |
52 | #define EX_BADUSAGE 2 |
53 | ||
54 | /* Special exit statuses used by the shell, internally and externally. */ | |
55 | #define EX_BINARY_FILE 126 | |
56 | #define EX_NOEXEC 126 | |
57 | #define EX_NOINPUT 126 | |
58 | #define EX_NOTFOUND 127 | |
726f6388 | 59 | |
ccc6cda3 JA |
60 | #define EX_SHERRBASE 256 /* all special error values are > this. */ |
61 | ||
62 | #define EX_BADSYNTAX 257 /* shell syntax error */ | |
63 | #define EX_USAGE 258 /* syntax error in usage */ | |
64 | #define EX_REDIRFAIL 259 /* redirection failed */ | |
65 | #define EX_BADASSIGN 260 /* variable assignment error */ | |
66 | #define EX_EXPFAIL 261 /* word expansion failed */ | |
726f6388 JA |
67 | |
68 | /* The list of characters that are quoted in double-quotes with a | |
69 | backslash. Other characters following a backslash cause nothing | |
70 | special to happen. */ | |
ccc6cda3 | 71 | #define slashify_in_quotes "\\`$\"\n" |
726f6388 JA |
72 | #define slashify_in_here_document "\\`$" |
73 | ||
74 | /* Constants which specify how to handle backslashes and quoting in | |
75 | expand_word_internal (). Q_DOUBLE_QUOTES means to use the function | |
76 | slashify_in_quotes () to decide whether the backslash should be | |
77 | retained. Q_HERE_DOCUMENT means slashify_in_here_document () to | |
78 | decide whether to retain the backslash. Q_KEEP_BACKSLASH means | |
79 | to unconditionally retain the backslash. */ | |
80 | #define Q_DOUBLE_QUOTES 0x1 | |
81 | #define Q_HERE_DOCUMENT 0x2 | |
82 | #define Q_KEEP_BACKSLASH 0x4 | |
ccc6cda3 JA |
83 | #define Q_NOQUOTE 0x8 |
84 | #define Q_QUOTED 0x10 | |
85 | #define Q_ADDEDQUOTES 0x20 | |
86 | #define Q_QUOTEDNULL 0x40 | |
87 | ||
88 | /* Flag values that control parameter pattern substitution. */ | |
89 | #define MATCH_ANY 0x0 | |
90 | #define MATCH_BEG 0x1 | |
91 | #define MATCH_END 0x2 | |
92 | ||
93 | #define MATCH_TYPEMASK 0x3 | |
94 | ||
95 | #define MATCH_GLOBREP 0x10 | |
96 | #define MATCH_QUOTED 0x20 | |
726f6388 | 97 | |
ccc6cda3 | 98 | /* Some needed external declarations. */ |
726f6388 JA |
99 | extern char **shell_environment; |
100 | extern WORD_LIST *rest_of_args; | |
101 | ||
102 | /* Generalized global variables. */ | |
103 | extern int executing, login_shell; | |
104 | ||
105 | /* Structure to pass around that holds a bitmap of file descriptors | |
106 | to close, and the size of that structure. Used in execute_cmd.c. */ | |
107 | struct fd_bitmap { | |
108 | long size; | |
109 | char *bitmap; | |
110 | }; | |
111 | ||
112 | #define FD_BITMAP_SIZE 32 | |
113 | ||
114 | #define CTLESC '\001' | |
115 | #define CTLNUL '\177' | |
116 | ||
117 | /* Information about the current user. */ | |
118 | struct user_info { | |
d166f048 JA |
119 | uid_t uid, euid; |
120 | gid_t gid, egid; | |
726f6388 JA |
121 | char *user_name; |
122 | char *shell; /* shell from the password file */ | |
123 | char *home_dir; | |
124 | }; | |
125 | ||
126 | extern struct user_info current_user; |