1/* $FreeBSD: head/contrib/libreadline/shell.c 119614 2003-08-31 18:29:38Z ache $ */
| 1/* $FreeBSD: head/contrib/libreadline/shell.c 136758 2004-10-21 20:02:02Z peter $ */
2
|
2/* shell.c -- readline utility functions that are normally provided by
3 bash when readline is linked as part of the shell. */
4
5/* Copyright (C) 1997 Free Software Foundation, Inc.
6
7 This file is part of the GNU Readline Library, a library for
8 reading lines of text with interactive input and history editing.
9
10 The GNU Readline Library is free software; you can redistribute it
11 and/or modify it under the terms of the GNU General Public License
12 as published by the Free Software Foundation; either version 2, or
13 (at your option) any later version.
14
15 The GNU Readline Library is distributed in the hope that it will be
16 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
17 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
19
20 The GNU General Public License is often shipped with GNU software, and
21 is generally kept in a file called COPYING or LICENSE. If you do not
22 have a copy of the license, write to the Free Software Foundation,
23 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
24#define READLINE_LIBRARY
25
26#if defined (HAVE_CONFIG_H)
27# include <config.h>
28#endif
29
30#include <sys/types.h>
31
32#if defined (HAVE_UNISTD_H)
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#if defined (HAVE_LIMITS_H)
49# include <limits.h>
50#endif
51
52#include <fcntl.h>
53#include <pwd.h>
54
55#include <stdio.h>
56
57#include "rlstdc.h"
58#include "rlshell.h"
59#include "xmalloc.h"
60
61#if !defined (HAVE_GETPW_DECLS)
62extern struct passwd *getpwuid PARAMS((uid_t));
63#endif /* !HAVE_GETPW_DECLS */
64
65#ifndef NULL
66# define NULL 0
67#endif
68
69#ifndef CHAR_BIT
70# define CHAR_BIT 8
71#endif
72
73/* Nonzero if the integer type T is signed. */
74#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
75
76/* Bound on length of the string representing an integer value of type T.
77 Subtract one for the sign bit if T is signed;
78 302 / 1000 is log10 (2) rounded up;
79 add one for integer division truncation;
80 add one more for a minus sign if t is signed. */
81#define INT_STRLEN_BOUND(t) \
82 ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \
83 + 1 + TYPE_SIGNED (t))
84
85/* All of these functions are resolved from bash if we are linking readline
86 as part of bash. */
87
88/* Does shell-like quoting using single quotes. */
89char *
90sh_single_quote (string)
91 char *string;
92{
93 register int c;
94 char *result, *r, *s;
95
96 result = (char *)xmalloc (3 + (4 * strlen (string)));
97 r = result;
98 *r++ = '\'';
99
100 for (s = string; s && (c = *s); s++)
101 {
102 *r++ = c;
103
104 if (c == '\'')
105 {
106 *r++ = '\\'; /* insert escaped single quote */
107 *r++ = '\'';
108 *r++ = '\''; /* start new quoted string */
109 }
110 }
111
112 *r++ = '\'';
113 *r = '\0';
114
115 return (result);
116}
117
118/* Set the environment variables LINES and COLUMNS to lines and cols,
119 respectively. */
120void
121sh_set_lines_and_columns (lines, cols)
122 int lines, cols;
123{
124 char *b;
125
126#if defined (HAVE_PUTENV)
127 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("LINES=") + 1);
128 sprintf (b, "LINES=%d", lines);
129 putenv (b);
| 3/* shell.c -- readline utility functions that are normally provided by
4 bash when readline is linked as part of the shell. */
5
6/* Copyright (C) 1997 Free Software Foundation, Inc.
7
8 This file is part of the GNU Readline Library, a library for
9 reading lines of text with interactive input and history editing.
10
11 The GNU Readline Library is free software; you can redistribute it
12 and/or modify it under the terms of the GNU General Public License
13 as published by the Free Software Foundation; either version 2, or
14 (at your option) any later version.
15
16 The GNU Readline Library is distributed in the hope that it will be
17 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
18 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 The GNU General Public License is often shipped with GNU software, and
22 is generally kept in a file called COPYING or LICENSE. If you do not
23 have a copy of the license, write to the Free Software Foundation,
24 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
25#define READLINE_LIBRARY
26
27#if defined (HAVE_CONFIG_H)
28# include <config.h>
29#endif
30
31#include <sys/types.h>
32
33#if defined (HAVE_UNISTD_H)
34# include <unistd.h>
35#endif /* HAVE_UNISTD_H */
36
37#if defined (HAVE_STDLIB_H)
38# include <stdlib.h>
39#else
40# include "ansi_stdlib.h"
41#endif /* HAVE_STDLIB_H */
42
43#if defined (HAVE_STRING_H)
44# include <string.h>
45#else
46# include <strings.h>
47#endif /* !HAVE_STRING_H */
48
49#if defined (HAVE_LIMITS_H)
50# include <limits.h>
51#endif
52
53#include <fcntl.h>
54#include <pwd.h>
55
56#include <stdio.h>
57
58#include "rlstdc.h"
59#include "rlshell.h"
60#include "xmalloc.h"
61
62#if !defined (HAVE_GETPW_DECLS)
63extern struct passwd *getpwuid PARAMS((uid_t));
64#endif /* !HAVE_GETPW_DECLS */
65
66#ifndef NULL
67# define NULL 0
68#endif
69
70#ifndef CHAR_BIT
71# define CHAR_BIT 8
72#endif
73
74/* Nonzero if the integer type T is signed. */
75#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
76
77/* Bound on length of the string representing an integer value of type T.
78 Subtract one for the sign bit if T is signed;
79 302 / 1000 is log10 (2) rounded up;
80 add one for integer division truncation;
81 add one more for a minus sign if t is signed. */
82#define INT_STRLEN_BOUND(t) \
83 ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \
84 + 1 + TYPE_SIGNED (t))
85
86/* All of these functions are resolved from bash if we are linking readline
87 as part of bash. */
88
89/* Does shell-like quoting using single quotes. */
90char *
91sh_single_quote (string)
92 char *string;
93{
94 register int c;
95 char *result, *r, *s;
96
97 result = (char *)xmalloc (3 + (4 * strlen (string)));
98 r = result;
99 *r++ = '\'';
100
101 for (s = string; s && (c = *s); s++)
102 {
103 *r++ = c;
104
105 if (c == '\'')
106 {
107 *r++ = '\\'; /* insert escaped single quote */
108 *r++ = '\'';
109 *r++ = '\''; /* start new quoted string */
110 }
111 }
112
113 *r++ = '\'';
114 *r = '\0';
115
116 return (result);
117}
118
119/* Set the environment variables LINES and COLUMNS to lines and cols,
120 respectively. */
121void
122sh_set_lines_and_columns (lines, cols)
123 int lines, cols;
124{
125 char *b;
126
127#if defined (HAVE_PUTENV)
128 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("LINES=") + 1);
129 sprintf (b, "LINES=%d", lines);
130 putenv (b);
|
| 131
|
130 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("COLUMNS=") + 1);
131 sprintf (b, "COLUMNS=%d", cols);
132 putenv (b);
133#else /* !HAVE_PUTENV */
134# if defined (HAVE_SETENV)
135 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1);
136 sprintf (b, "%d", lines);
137 setenv ("LINES", b, 1);
| 132 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + sizeof ("COLUMNS=") + 1);
133 sprintf (b, "COLUMNS=%d", cols);
134 putenv (b);
135#else /* !HAVE_PUTENV */
136# if defined (HAVE_SETENV)
137 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1);
138 sprintf (b, "%d", lines);
139 setenv ("LINES", b, 1);
|
| 140 free (b);
141
|
138 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1);
139 sprintf (b, "%d", cols);
140 setenv ("COLUMNS", b, 1);
| 142 b = (char *)xmalloc (INT_STRLEN_BOUND (int) + 1);
143 sprintf (b, "%d", cols);
144 setenv ("COLUMNS", b, 1);
|
| 145 free (b);
|
141# endif /* HAVE_SETENV */
142#endif /* !HAVE_PUTENV */
143}
144
145char *
146sh_get_env_value (varname)
147 const char *varname;
148{
149 return ((char *)getenv (varname));
150}
151
152char *
153sh_get_home_dir ()
154{
155 char *home_dir;
156 struct passwd *entry;
157
158 home_dir = (char *)NULL;
159 entry = getpwuid (getuid ());
160 if (entry)
161 home_dir = entry->pw_dir;
162 return (home_dir);
163}
164
165#if !defined (O_NDELAY)
166# if defined (FNDELAY)
167# define O_NDELAY FNDELAY
168# endif
169#endif
170
171int
172sh_unset_nodelay_mode (fd)
173 int fd;
174{
175 int flags, bflags;
176
177 if ((flags = fcntl (fd, F_GETFL, 0)) < 0)
178 return -1;
179
180 bflags = 0;
181
182#ifdef O_NONBLOCK
183 bflags |= O_NONBLOCK;
184#endif
185
186#ifdef O_NDELAY
187 bflags |= O_NDELAY;
188#endif
189
190 if (flags & bflags)
191 {
192 flags &= ~bflags;
193 return (fcntl (fd, F_SETFL, flags));
194 }
195
196 return 0;
197}
| 146# endif /* HAVE_SETENV */
147#endif /* !HAVE_PUTENV */
148}
149
150char *
151sh_get_env_value (varname)
152 const char *varname;
153{
154 return ((char *)getenv (varname));
155}
156
157char *
158sh_get_home_dir ()
159{
160 char *home_dir;
161 struct passwd *entry;
162
163 home_dir = (char *)NULL;
164 entry = getpwuid (getuid ());
165 if (entry)
166 home_dir = entry->pw_dir;
167 return (home_dir);
168}
169
170#if !defined (O_NDELAY)
171# if defined (FNDELAY)
172# define O_NDELAY FNDELAY
173# endif
174#endif
175
176int
177sh_unset_nodelay_mode (fd)
178 int fd;
179{
180 int flags, bflags;
181
182 if ((flags = fcntl (fd, F_GETFL, 0)) < 0)
183 return -1;
184
185 bflags = 0;
186
187#ifdef O_NONBLOCK
188 bflags |= O_NONBLOCK;
189#endif
190
191#ifdef O_NDELAY
192 bflags |= O_NDELAY;
193#endif
194
195 if (flags & bflags)
196 {
197 flags &= ~bflags;
198 return (fcntl (fd, F_SETFL, flags));
199 }
200
201 return 0;
202}
|