.

[gnulib.git] / lib / userspec.c

diff --git a/lib/userspec.c b/lib/userspec.c
index d95780a..cb1f8a7 100644 (file)
--- a/lib/userspec.c
+++ b/lib/userspec.c
@@ -1,5 +1,5 @@
 /* userspec.c -- Parse a user and group string.
-   Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
+   Copyright (C) 1989-1992, 1997, 1998 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
@@ -12,23 +12,23 @@
    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>.  */
-\f
-#ifdef HAVE_CONFIG_H
-#include <config.h>
+
+#if HAVE_CONFIG_H
+# include <config.h>
 #endif
 
 #ifdef __GNUC__
 # define alloca __builtin_alloca
 #else
-# ifdef HAVE_ALLOCA_H
+# if HAVE_ALLOCA_H
 #  include <alloca.h>
 # else
 #  ifdef _AIX
- #pragma alloca
+ #  pragma alloca
 #  else
 char *alloca ();
 #  endif
@@ -40,7 +40,7 @@ char *alloca ();
 #include <pwd.h>
 #include <grp.h>
 
-#ifdef HAVE_STRING_H
+#if HAVE_STRING_H
 # include <string.h>
 #else
 # include <strings.h>
@@ -49,11 +49,11 @@ char *alloca ();
 # endif
 #endif
 
-#ifdef STDC_HEADERS
+#if STDC_HEADERS
 # include <stdlib.h>
 #endif
 
-#ifdef HAVE_UNISTD_H
+#if HAVE_UNISTD_H
 # include <unistd.h>
 #endif
 
@@ -63,9 +63,12 @@ struct group *getgrnam ();
 struct group *getgrgid ();
 #endif
 
-#ifdef _POSIX_SOURCE
-#define endpwent()
-#define endgrent()
+#ifndef HAVE_ENDGRENT
+# define endgrent() ((void) 0)
+#endif
+
+#ifndef HAVE_ENDPWENT
+# define endpwent() ((void) 0)
 #endif
 
 /* Perform the equivalent of the statement `dest = strdup (src);',
@@ -82,14 +85,15 @@ struct group *getgrgid ();
 
 #define isdigit(c) ((c) >= '0' && (c) <= '9')
 
+#ifndef strdup
 char *strdup ();
+#endif
 
 /* Return nonzero if STR represents an unsigned decimal integer,
    otherwise return 0. */
 
 static int
-is_number (str)
-     const char *str;
+is_number (const char *str)
 {
   for (; *str; str++)
     if (!isdigit (*str))
@@ -110,11 +114,8 @@ is_number (str)
    Return NULL if successful, a static error message string if not.  */
 
 const char *
-parse_user_spec (spec_arg, uid, gid, username_arg, groupname_arg)
-     const char *spec_arg;
-     uid_t *uid;
-     gid_t *gid;
-     char **username_arg, **groupname_arg;
+parse_user_spec (const char *spec_arg, uid_t *uid, gid_t *gid,
+                char **username_arg, char **groupname_arg)
 {
   static const char *tired = "virtual memory exhausted";
   const char *error_msg;
@@ -150,6 +151,15 @@ parse_user_spec (spec_arg, uid, gid, username_arg, groupname_arg)
   if (u == NULL && g == NULL)
     return "can not omit both user and group";
 
+#ifdef __DJGPP__
+  /* Pretend that we are the user U whose group is G.  This makes
+     pwd and grp functions ``know'' about the UID and GID of these.  */
+  if (u && !is_number (u))
+    setenv ("USER", u, 1);
+  if (g && !is_number (g))
+    setenv ("GROUP", g, 1);
+#endif
+
   if (u != NULL)
     {
       pwd = getpwnam (u);
@@ -244,7 +254,7 @@ parse_user_spec (spec_arg, uid, gid, username_arg, groupname_arg)
 
 #ifdef TEST
 
-#define NULL_CHECK(s) ((s) == NULL ? "(null)" : (s))
+# define NULL_CHECK(s) ((s) == NULL ? "(null)" : (s))
 
 int
 main (int argc, char **argv)