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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 | |
11 | as published by the Free Software Foundation; either version 1, or | |
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, | |
22 | 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
23 | #define READLINE_LIBRARY | |
24 | ||
25 | #if defined (HAVE_CONFIG_H) | |
26 | # include <config.h> | |
27 | #endif | |
28 | ||
29 | #if defined (HAVE_UNISTD_H) | |
30 | # ifdef _MINIX | |
31 | # include <sys/types.h> | |
32 | # endif | |
33 | # include <unistd.h> | |
34 | #endif /* HAVE_UNISTD_H */ | |
35 | ||
36 | #if defined (HAVE_STDLIB_H) | |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
42 | #if defined (HAVE_STRING_H) | |
43 | # include <string.h> | |
44 | #else | |
45 | # include <strings.h> | |
46 | #endif /* !HAVE_STRING_H */ | |
47 | ||
48 | extern char *xmalloc (), *xrealloc (); | |
49 | ||
50 | #if !defined (SHELL) | |
51 | ||
52 | #ifdef savestring | |
53 | #undef savestring | |
54 | #endif | |
55 | ||
56 | /* Backwards compatibility, now that savestring has been removed from | |
57 | all `public' readline header files. */ | |
58 | char * | |
59 | savestring (s) | |
60 | char *s; | |
61 | { | |
62 | return ((char *)strcpy (xmalloc (1 + (int)strlen (s)), (s))); | |
63 | } | |
64 | ||
65 | /* Does shell-like quoting using single quotes. */ | |
66 | char * | |
67 | single_quote (string) | |
68 | char *string; | |
69 | { | |
70 | register int c; | |
71 | char *result, *r, *s; | |
72 | ||
73 | result = (char *)xmalloc (3 + (3 * strlen (string))); | |
74 | r = result; | |
75 | *r++ = '\''; | |
76 | ||
77 | for (s = string; s && (c = *s); s++) | |
78 | { | |
79 | *r++ = c; | |
80 | ||
81 | if (c == '\'') | |
82 | { | |
83 | *r++ = '\\'; /* insert escaped single quote */ | |
84 | *r++ = '\''; | |
85 | *r++ = '\''; /* start new quoted string */ | |
86 | } | |
87 | } | |
88 | ||
89 | *r++ = '\''; | |
90 | *r = '\0'; | |
91 | ||
92 | return (result); | |
93 | } | |
94 | ||
95 | /* Set the environment variables LINES and COLUMNS to lines and cols, | |
96 | respectively. */ | |
97 | void | |
98 | set_lines_and_columns (lines, cols) | |
99 | int lines, cols; | |
100 | { | |
101 | char *b; | |
102 | ||
103 | #if defined (HAVE_PUTENV) | |
104 | b = xmalloc (24); | |
105 | sprintf (b, "LINES=%d", lines); | |
106 | putenv (b); | |
107 | b = xmalloc (24); | |
108 | sprintf (b, "COLUMNS=%d", cols); | |
109 | putenv (b); | |
110 | #else /* !HAVE_PUTENV */ | |
111 | # if defined (HAVE_SETENV) | |
112 | b = xmalloc (8); | |
113 | sprintf (b, "%d", lines); | |
114 | setenv ("LINES", b, 1); | |
115 | b = xmalloc (8); | |
116 | sprintf (b, "%d", cols); | |
117 | setenv ("COLUMNS", b, 1); | |
118 | # endif /* HAVE_SETENV */ | |
119 | #endif /* !HAVE_PUTENV */ | |
120 | } | |
121 | ||
122 | char * | |
123 | get_env_value (varname) | |
124 | char *varname; | |
125 | { | |
126 | return ((char *)getenv (varname)); | |
127 | } | |
128 | ||
129 | #else /* SHELL */ | |
130 | extern char *get_string_value (); | |
131 | ||
132 | char * | |
133 | get_env_value (varname) | |
134 | char *varname; | |
135 | { | |
136 | return get_string_value (varname); | |
137 | } | |
138 | #endif /* SHELL */ |