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/* 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 <stdio.h>
#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_STDIO_H)
# include <stdio.h>
#endif /* HAVE_STDIO_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);
}
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