(__argp_help): Create a fake struct argp_state and

[gnulib.git] / lib / idcache.c

diff --git a/lib/idcache.c b/lib/idcache.c
index c00ee86..8b85f07 100644 (file)
--- a/lib/idcache.c
+++ b/lib/idcache.c
@@ -1,5 +1,6 @@
 /* idcache.c -- map user and group IDs, cached for speed
-   Copyright (C) 1985, 1988, 1989, 1990, 1997, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1985, 1988, 1989, 1990, 1997, 1998, 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
@@ -20,20 +21,17 @@
 #endif
 
 #include <stdio.h>
+#include <string.h>
 #include <sys/types.h>
 #include <pwd.h>
 #include <grp.h>
 
-#if STDC_HEADERS || HAVE_STRING_H
-# include <string.h>
-#else
-# include <strings.h>
-#endif
-
 #if HAVE_UNISTD_H
 # include <unistd.h>
 #endif
 
+#include "xalloc.h"
+
 #ifndef _POSIX_VERSION
 struct passwd *getpwuid ();
 struct passwd *getpwnam ();
@@ -41,8 +39,9 @@ struct group *getgrgid ();
 struct group *getgrnam ();
 #endif
 
-char *xmalloc ();
-char *xstrdup ();
+#ifdef __DJGPP__
+static char digits[] = "0123456789";
+#endif
 
 struct userid
 {
@@ -73,7 +72,7 @@ getuser (uid_t uid)
       return tail->name;
 
   pwent = getpwuid (uid);
-  tail = (struct userid *) xmalloc (sizeof (struct userid));
+  tail = xmalloc (sizeof (struct userid));
   tail->id.u = uid;
   tail->name = pwent ? xstrdup (pwent->pw_name) : NULL;
 
@@ -105,8 +104,17 @@ getuidbyname (const char *user)
       return 0;
 
   pwent = getpwnam (user);
+#ifdef __DJGPP__
+  /* We need to pretend to be the user USER, to make
+     pwd functions know about an arbitrary user name.  */
+  if (!pwent && strspn (user, digits) < strlen (user))
+    {
+      setenv ("USER", user, 1);
+      pwent = getpwnam (user); /* now it will succeed */
+    }
+#endif
 
-  tail = (struct userid *) xmalloc (sizeof (struct userid));
+  tail = xmalloc (sizeof (struct userid));
   tail->name = xstrdup (user);
 
   /* Add to the head of the list, so most recently used is first.  */
@@ -140,7 +148,7 @@ getgroup (gid_t gid)
       return tail->name;
 
   grent = getgrgid (gid);
-  tail = (struct userid *) xmalloc (sizeof (struct userid));
+  tail = xmalloc (sizeof (struct userid));
   tail->id.g = gid;
   tail->name = grent ? xstrdup (grent->gr_name) : NULL;
 
@@ -172,8 +180,17 @@ getgidbyname (const char *group)
       return 0;
 
   grent = getgrnam (group);
+#ifdef __DJGPP__
+  /* We need to pretend to belong to group GROUP, to make
+     grp functions know about any arbitrary group name.  */
+  if (!grent && strspn (group, digits) < strlen (group))
+    {
+      setenv ("GROUP", group, 1);
+      grent = getgrnam (group);        /* now it will succeed */
+    }
+#endif
 
-  tail = (struct userid *) xmalloc (sizeof (struct userid));
+  tail = xmalloc (sizeof (struct userid));
   tail->name = xstrdup (group);
 
   /* Add to the head of the list, so most recently used is first.  */