summaryrefslogtreecommitdiff
path: root/readline/shell.c
blob: 091ec08f645715f13b12bf53459e6f0b5e0deffb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
/* shell.c -- readline utility functions that are normally provided by
	      bash when readline is linked as part of the shell. */

/* Copyright (C) 1997 Free Software Foundation, Inc.

   This file is part of the GNU Readline Library, a library for
   reading lines of text with interactive input and history editing.

   The GNU Readline Library 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 1, or
   (at your option) any later version.

   The GNU Readline Library 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.

   The GNU General Public License is often shipped with GNU software, and
   is generally kept in a file called COPYING or LICENSE.  If you do not
   have a copy of the license, write to the Free Software Foundation,
   675 Mass Ave, Cambridge, MA 02139, USA. */
#define READLINE_LIBRARY

#if defined (HAVE_CONFIG_H)
#  include <config.h>
#endif

#include <sys/types.h>

#if defined (HAVE_UNISTD_H)
#  include <unistd.h>
#endif /* HAVE_UNISTD_H */

#if defined (HAVE_STDLIB_H)
#  include <stdlib.h>
#else
#  include "ansi_stdlib.h"
#endif /* HAVE_STDLIB_H */

#if defined (HAVE_STRING_H)
#  include <string.h>
#else
#  include <strings.h>
#endif /* !HAVE_STRING_H */

#include <pwd.h>

#if !defined (HAVE_GETPW_DECLS)
extern struct passwd *getpwuid ();
#endif /* !HAVE_GETPW_DECLS */

extern char *xmalloc ();

/* All of these functions are resolved from bash if we are linking readline
   as part of bash. */

/* Does shell-like quoting using single quotes. */
char *
single_quote (string)
     char *string;
{
  register int c;
  char *result, *r, *s;

  result = (char *)xmalloc (3 + (3 * strlen (string)));
  r = result;
  *r++ = '\'';

  for (s = string; s && (c = *s); s++)
    {
      *r++ = c;

      if (c == '\'')
	{
	  *r++ = '\\';	/* insert escaped single quote */
	  *r++ = '\'';
	  *r++ = '\'';	/* start new quoted string */
	}
    }

  *r++ = '\'';
  *r = '\0';

  return (result);
}

/* Set the environment variables LINES and COLUMNS to lines and cols,
   respectively. */
void
set_lines_and_columns (lines, cols)
     int lines, cols;
{
  char *b;

#if defined (HAVE_PUTENV)
  b = xmalloc (24);
  sprintf (b, "LINES=%d", lines);
  putenv (b);
  b = xmalloc (24);
  sprintf (b, "COLUMNS=%d", cols);
  putenv (b);
#else /* !HAVE_PUTENV */
#  if defined (HAVE_SETENV)
  b = xmalloc (8);
  sprintf (b, "%d", lines);
  setenv ("LINES", b, 1);
  b = xmalloc (8);
  sprintf (b, "%d", cols);
  setenv ("COLUMNS", b, 1);
#  endif /* HAVE_SETENV */
#endif /* !HAVE_PUTENV */
}

char *
get_env_value (varname)
     char *varname;
{
  return ((char *)getenv (varname));
}

char *
get_home_dir ()
{
  char *home_dir;
  struct passwd *entry;

  home_dir = (char *)NULL;
  entry = getpwuid (getuid ());
  if (entry)
    home_dir = entry->pw_dir;
  return (home_dir);
}