/* getusershell.c -- Return names of valid user shells.
- Copyright (C) 1991 Free Software Foundation, Inc.
+ Copyright (C) 1991, 1997, 2000 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Written by David MacKenzie <djm@gnu.ai.mit.edu> */
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
#ifndef SHELLS_FILE
+# ifndef __DJGPP__
/* File containing a list of nonrestricted shells, one per line. */
-#define SHELLS_FILE "/etc/shells"
+# define SHELLS_FILE "/etc/shells"
+# else
+/* This is a horrible kludge. Isn't there a better way? */
+# define SHELLS_FILE "/dev/env/DJDIR/etc/shells"
+# endif
#endif
#include <stdio.h>
+#if HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
#include <ctype.h>
+#include "xalloc.h"
-#ifdef STDC_HEADERS
-#include <stdlib.h>
+#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
+# define IN_CTYPE_DOMAIN(c) 1
#else
-char *malloc ();
-char *realloc ();
+# define IN_CTYPE_DOMAIN(c) isascii(c)
#endif
+#define ISSPACE(c) (IN_CTYPE_DOMAIN (c) && isspace (c))
+
static int readname ();
+#if ! defined ADDITIONAL_DEFAULT_SHELLS && defined __MSDOS__
+# define ADDITIONAL_DEFAULT_SHELLS \
+ "c:/dos/command.com", "c:/windows/command.com", "c:/command.com",
+#else
+# define ADDITIONAL_DEFAULT_SHELLS /* empty */
+#endif
+
/* List of shells to use if the shells file is missing. */
static char const* const default_shells[] =
{
+ ADDITIONAL_DEFAULT_SHELLS
"/bin/sh", "/bin/csh", "/usr/bin/sh", "/usr/bin/csh", NULL
};
static int line_size = 0;
\f
/* Return an entry from the shells file, ignoring comment lines.
+ If the file doesn't exist, use the list in DEFAULT_SHELLS (above).
+ In any case, the returned string is in memory allocated through malloc.
Return NULL if there are no more entries. */
char *
{
if (default_shells[default_index])
/* Not at the end of the list yet. */
- return default_shells[default_index++];
+ return xstrdup (default_shells[default_index++]);
return NULL;
}
{
/* No shells file. Use the default list. */
default_index = 1;
- return default_shells[0];
+ return xstrdup (default_shells[0]);
}
}
setusershell ()
{
default_index = 0;
- if (shellstream == NULL)
- shellstream = fopen (SHELLS_FILE, "r");
- else
- fseek (shellstream, 0L, 0);
+ if (shellstream)
+ rewind (shellstream);
}
/* Close the shells file. */
}
}
-/* Allocate N bytes of memory dynamically, with error checking. */
-
-static char *
-xmalloc (n)
- unsigned n;
-{
- char *p;
-
- p = malloc (n);
- if (p == 0)
- {
- fprintf (stderr, "virtual memory exhausted\n");
- exit (1);
- }
- return p;
-}
-
-/* Reallocate space P to size N, with error checking. */
-
-static char *
-xrealloc (p, n)
- char *p;
- unsigned n;
-{
- p = realloc (p, n);
- if (p == 0)
- {
- fprintf (stderr, "virtual memory exhausted\n");
- exit (1);
- }
- return p;
-}
-
/* Read a line from STREAM, removing any newline at the end.
Place the result in *NAME, which is malloc'd
and/or realloc'd as necessary and can start out NULL,
}
/* Skip blank space. */
- while ((c = getc (stream)) != EOF && isspace (c))
+ while ((c = getc (stream)) != EOF && ISSPACE (c))
/* Do nothing. */ ;
-
- while (c != EOF && !isspace (c))
+
+ while (c != EOF && !ISSPACE (c))
{
(*name)[name_index++] = c;
while (name_index >= *size)