1 files changed, 131 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/chown.c b/sysdeps/unix/sysv/linux/powerpc/chown.c
new file mode 100644
index 0000000..5f6c3d2
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/chown.c
@@ -0,0 +1,131 @@
+/* chown() compatibility.
+   Copyright (C) 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
+#include <sys/syscall.h>
+#include <stdlib.h>
+
+/*
+  In Linux 2.1.x the chown functions have been changed.  A new function lchown
+  was introduced.  The new chown now follows symlinks - the old chown and the
+  new lchown do not follow symlinks.
+  This file emulates chown() under the old kernels.
+*/
+
+extern int __syscall_chown (const char *__file,
+			    uid_t __owner, gid_t __group);
+
+int
+__chown (const char *file, uid_t owner, gid_t group)
+{
+   int err;
+   int old_errno;
+   char link[PATH_MAX+2];
+   char path[2*PATH_MAX+4];
+   int loopct;
+   int filelen;
+   static int libc_old_chown = 0 /* -1=old linux, 1=new linux, 0=unknown */;
+   
+   if (libc_old_chown == 1)
+     return __syscall_chown (file, owner, group);
+
+   old_errno = errno;
+
+#ifdef __NR_lchown
+   if (libc_old_chown == 0)
+     {
+       err = __syscall_chown (file, owner, group);
+       if (err != -1 || errno != ENOSYS)
+	 {
+	   libc_old_chown = 1;
+	   return err;
+	 }
+       libc_old_chown = -1;
+     }
+#endif
+   
+   err = __readlink (file, link, PATH_MAX+1);
+   if (err == -1)
+     {
+       errno = old_errno;
+       return __lchown(file, owner, group);
+     }
+
+   filelen = strlen (file) + 1;
+   if (filelen > sizeof(path))
+     {
+       errno = ENAMETOOLONG;
+       return -1;
+     }
+   memcpy (path, file, filelen);
+
+   /* 'The system has an arbitrary limit...'  In practise, we'll hit
+      ENAMETOOLONG before this, usually.  */
+   for (loopct = 0; loopct < 128; loopct++)
+   {
+     int linklen;
+     
+     if (err >= PATH_MAX+1)
+       {
+	 errno = ENAMETOOLONG;
+	 return -1;
+       }
+
+      link[err] = 0;  /* Null-terminate string, just-in-case.  */
+
+      linklen = strlen (link) + 1;
+      
+      if (link[0] == '/')
+	memcpy (path, link, linklen);
+      else
+	{
+	  filelen = strlen (path);
+	  
+	  while (filelen > 1 && path[filelen-1] == '/')
+	    filelen--;
+	  while (filelen > 0 && path[filelen-1] != '/')
+	    filelen--;
+	  if (filelen + linklen > sizeof(path))
+	    {
+	      errno = ENAMETOOLONG;
+	      return -1;
+	    }
+	  memcpy (path+filelen, link, linklen);
+	}
+
+      err = __readlink(path, link, PATH_MAX+1);
+      
+      if (err == -1)
+      {  
+	errno = old_errno;
+	return __lchown(path, owner, group);
+      }
+   }
+   errno = ELOOP;
+   return -1;
+}
+
+#if defined PIC && defined DO_VERSIONING
+default_symbol_version (__chown, chown, GLIBC_2.1);
+#else
+weak_alias (__chown, chown)
+#endif