/* getusershell.c -- Return names of valid user shells.
- Copyright (C) 1991 Free Software Foundation, Inc.
+ Copyright (C) 1991, 1997, 2000, 2001, 2003 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
#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 "unlocked-io.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
-char *xstrdup ();
+#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
};
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,
if (*name == NULL)
{
*size = 10;
- *name = (char *) xmalloc (*size);
+ *name = xmalloc (*size);
}
/* 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)
{
*size *= 2;
- *name = (char *) xrealloc (*name, *size);
+ *name = xrealloc (*name, *size);
}
c = getc (stream);
}