X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fuserspec.c;h=c1f580a17ffe4c66bf5eca4a096a693f8676faf4;hb=fa662f811f9a6dda54f64639b107b1637c3ba2e5;hp=c3992d288e0ed79c8b1dca269ed70c0d66fcabc6;hpb=267a39bafd249d7eb9c37df06dc6defcf41cb343;p=gnulib.git

diff --git a/lib/userspec.c b/lib/userspec.c
index c3992d288..c1f580a17 100644
--- a/lib/userspec.c
+++ b/lib/userspec.c
@@ -1,5 +1,5 @@
 /* userspec.c -- Parse a user and group string.
-   Copyright (C) 1989-1992, 1997-1998, 2000, 2002-2005 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
@@ -18,9 +18,7 @@
 
 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>.  */
 
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <config.h>
 
 /* Specification.  */
 #include "userspec.h"
@@ -39,13 +37,10 @@
 #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"
 
@@ -53,12 +48,6 @@
 #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
@@ -84,11 +73,11 @@ struct group *getgrgid ();
 #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)
 
@@ -117,8 +106,7 @@ parse_with_separator (char const *spec, char const *separator,
 {
   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;
@@ -167,12 +155,17 @@ parse_with_separator (char const *spec, char const *separator,
 
   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;
@@ -203,7 +196,8 @@ parse_with_separator (char const *spec, char const *separator,
   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;