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d166f048 JA |
1 | /* shell.c -- readline utility functions that are normally provided by |
2 | bash when readline is linked as part of the shell. */ | |
3 | ||
4 | /* Copyright (C) 1997 Free Software Foundation, Inc. | |
5 | ||
6 | This file is part of the GNU Readline Library, a library for | |
7 | reading lines of text with interactive input and history editing. | |
8 | ||
9 | The GNU Readline Library is free software; you can redistribute it | |
10 | and/or modify it under the terms of the GNU General Public License | |
bb70624e | 11 | as published by the Free Software Foundation; either version 2, or |
d166f048 JA |
12 | (at your option) any later version. |
13 | ||
14 | The GNU Readline Library is distributed in the hope that it will be | |
15 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty | |
16 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | The GNU General Public License is often shipped with GNU software, and | |
20 | is generally kept in a file called COPYING or LICENSE. If you do not | |
21 | have a copy of the license, write to the Free Software Foundation, | |
bb70624e | 22 | 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
d166f048 JA |
23 | #define READLINE_LIBRARY |
24 | ||
25 | #if defined (HAVE_CONFIG_H) | |
26 | # include <config.h> | |
27 | #endif | |
28 | ||
b72432fd JA |
29 | #include <sys/types.h> |
30 | ||
d166f048 JA |
31 | #if defined (HAVE_UNISTD_H) |
32 | # include <unistd.h> | |
33 | #endif /* HAVE_UNISTD_H */ | |
34 | ||
35 | #if defined (HAVE_STDLIB_H) | |
36 | # include <stdlib.h> | |
37 | #else | |
38 | # include "ansi_stdlib.h" | |
39 | #endif /* HAVE_STDLIB_H */ | |
40 | ||
cce855bc JA |
41 | #if defined (HAVE_STRING_H) |
42 | # include <string.h> | |
43 | #else | |
44 | # include <strings.h> | |
45 | #endif /* !HAVE_STRING_H */ | |
46 | ||
bb70624e | 47 | #include <fcntl.h> |
b72432fd | 48 | #include <pwd.h> |
d166f048 | 49 | |
bb70624e JA |
50 | #include <stdio.h> |
51 | ||
28ef6c31 | 52 | #include "rlstdc.h" |
bb70624e JA |
53 | #include "rlshell.h" |
54 | #include "xmalloc.h" | |
55 | ||
b72432fd | 56 | #if !defined (HAVE_GETPW_DECLS) |
28ef6c31 | 57 | extern struct passwd *getpwuid __P((uid_t)); |
b72432fd | 58 | #endif /* !HAVE_GETPW_DECLS */ |
d166f048 | 59 | |
bb70624e JA |
60 | #ifndef NULL |
61 | # define NULL 0 | |
62 | #endif | |
d166f048 | 63 | |
b72432fd JA |
64 | /* All of these functions are resolved from bash if we are linking readline |
65 | as part of bash. */ | |
d166f048 JA |
66 | |
67 | /* Does shell-like quoting using single quotes. */ | |
68 | char * | |
28ef6c31 | 69 | sh_single_quote (string) |
d166f048 JA |
70 | char *string; |
71 | { | |
72 | register int c; | |
73 | char *result, *r, *s; | |
74 | ||
bb70624e | 75 | result = (char *)xmalloc (3 + (4 * strlen (string))); |
d166f048 JA |
76 | r = result; |
77 | *r++ = '\''; | |
78 | ||
79 | for (s = string; s && (c = *s); s++) | |
80 | { | |
81 | *r++ = c; | |
82 | ||
83 | if (c == '\'') | |
84 | { | |
85 | *r++ = '\\'; /* insert escaped single quote */ | |
86 | *r++ = '\''; | |
87 | *r++ = '\''; /* start new quoted string */ | |
88 | } | |
89 | } | |
90 | ||
91 | *r++ = '\''; | |
92 | *r = '\0'; | |
93 | ||
94 | return (result); | |
95 | } | |
96 | ||
97 | /* Set the environment variables LINES and COLUMNS to lines and cols, | |
98 | respectively. */ | |
99 | void | |
28ef6c31 | 100 | sh_set_lines_and_columns (lines, cols) |
d166f048 JA |
101 | int lines, cols; |
102 | { | |
103 | char *b; | |
104 | ||
105 | #if defined (HAVE_PUTENV) | |
106 | b = xmalloc (24); | |
107 | sprintf (b, "LINES=%d", lines); | |
108 | putenv (b); | |
109 | b = xmalloc (24); | |
110 | sprintf (b, "COLUMNS=%d", cols); | |
111 | putenv (b); | |
112 | #else /* !HAVE_PUTENV */ | |
113 | # if defined (HAVE_SETENV) | |
114 | b = xmalloc (8); | |
115 | sprintf (b, "%d", lines); | |
116 | setenv ("LINES", b, 1); | |
117 | b = xmalloc (8); | |
118 | sprintf (b, "%d", cols); | |
119 | setenv ("COLUMNS", b, 1); | |
120 | # endif /* HAVE_SETENV */ | |
121 | #endif /* !HAVE_PUTENV */ | |
122 | } | |
123 | ||
124 | char * | |
28ef6c31 JA |
125 | sh_get_env_value (varname) |
126 | const char *varname; | |
d166f048 JA |
127 | { |
128 | return ((char *)getenv (varname)); | |
129 | } | |
130 | ||
d166f048 | 131 | char * |
28ef6c31 | 132 | sh_get_home_dir () |
d166f048 | 133 | { |
b72432fd JA |
134 | char *home_dir; |
135 | struct passwd *entry; | |
136 | ||
137 | home_dir = (char *)NULL; | |
138 | entry = getpwuid (getuid ()); | |
139 | if (entry) | |
140 | home_dir = entry->pw_dir; | |
141 | return (home_dir); | |
142 | } | |
bb70624e JA |
143 | |
144 | #if !defined (O_NDELAY) | |
145 | # if defined (FNDELAY) | |
146 | # define O_NDELAY FNDELAY | |
147 | # endif | |
148 | #endif | |
149 | ||
150 | int | |
28ef6c31 | 151 | sh_unset_nodelay_mode (fd) |
bb70624e JA |
152 | int fd; |
153 | { | |
154 | int flags, bflags; | |
155 | ||
156 | if ((flags = fcntl (fd, F_GETFL, 0)) < 0) | |
157 | return -1; | |
158 | ||
159 | bflags = 0; | |
160 | ||
161 | #ifdef O_NONBLOCK | |
162 | bflags |= O_NONBLOCK; | |
163 | #endif | |
164 | ||
165 | #ifdef O_NDELAY | |
166 | bflags |= O_NDELAY; | |
167 | #endif | |
168 | ||
169 | if (flags & bflags) | |
170 | { | |
171 | flags &= ~bflags; | |
172 | return (fcntl (fd, F_SETFL, flags)); | |
173 | } | |
174 | ||
175 | return 0; | |
176 | } |