/* userspec.c -- Parse a user and group string.
- Copyright (C) 1989-1992, 1997-1998, 2000, 2002-2004 Free Software
+ Copyright (C) 1989-1992, 1997-1998, 2000, 2002-2007 Free Software
Foundation, Inc.
This program is free software; you can redistribute it and/or modify
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
/* Specification. */
#include "userspec.h"
#include <stdlib.h>
#include <string.h>
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
+#include <unistd.h>
+#include "intprops.h"
#include "inttostr.h"
-#include "strdup.h"
#include "xalloc.h"
#include "xstrtol.h"
#define _(msgid) gettext (msgid)
#define N_(msgid) msgid
-#ifndef _POSIX_VERSION
-struct passwd *getpwnam ();
-struct group *getgrnam ();
-struct group *getgrgid ();
-#endif
-
#ifndef HAVE_ENDGRENT
# define endgrent() ((void) 0)
#endif
# define endpwent() ((void) 0)
#endif
-/* The extra casts work around common compiler bugs. */
-#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
-/* The outer cast is needed to work around a bug in Cray C 5.0.3.0.
- It is necessary at least when t == time_t. */
-#define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \
- ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
-#define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t)))
-
#ifndef UID_T_MAX
# define UID_T_MAX TYPE_MAXIMUM (uid_t)
#endif
#endif
/* ISDIGIT differs from isdigit, as follows:
- - Its arg may be any int or unsigned int; it need not be an unsigned char.
- - It's guaranteed to evaluate its argument exactly once.
+ - Its arg may be any int or unsigned int; it need not be an unsigned char
+ or EOF.
- It's typically faster.
POSIX says that only '0' through '9' are digits. Prefer ISDIGIT to
- ISDIGIT_LOCALE unless it's important to use the locale's definition
+ isdigit unless it's important to use the locale's definition
of `digit' even when the host does not conform to POSIX. */
#define ISDIGIT(c) ((unsigned int) (c) - '0' <= 9)
{
static const char *E_invalid_user = N_("invalid user");
static const char *E_invalid_group = N_("invalid group");
- static const char *E_bad_spec =
- N_("cannot get the login group of a numeric UID");
+ static const char *E_bad_spec = N_("invalid spec");
const char *error_msg;
struct passwd *pwd;
if (u != NULL)
{
- pwd = getpwnam (u);
+ /* If it starts with "+", skip the look-up. */
+ pwd = (*u == '+' ? NULL : getpwnam (u));
if (pwd == NULL)
{
bool use_login_group = (separator != NULL && g == NULL);
if (use_login_group)
- error_msg = E_bad_spec;
+ {
+ /* If there is no group,
+ then there may not be a trailing ":", either. */
+ error_msg = E_bad_spec;
+ }
else
{
unsigned long int tmp;
if (g != NULL && error_msg == NULL)
{
/* Explicit group. */
- grp = getgrnam (g);
+ /* If it starts with "+", skip the look-up. */
+ grp = (*g == '+' ? NULL : getgrnam (g));
if (grp == NULL)
{
unsigned long int tmp;