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authorUlrich Drepper <drepper@redhat.com>1998-03-08 17:12:51 +0000
committerUlrich Drepper <drepper@redhat.com>1998-03-08 17:12:51 +0000
commit1581459f2e26e2a6af42790cd7a488806154a294 (patch)
treee1f94ab3e1fe632ccface8a5da19cdc589fb933f /sysdeps/unix
parent3db52d94e2dcd03925664df6a09e9676ad1f2baf (diff)
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Update.
1998-03-07 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/unix/sysv/linux/chown.c: New file for compatibility of Linux 2.0 and 2.1. * sysdeps/unix/sysv/linux/syscalls.list: Add chown.
Diffstat (limited to 'sysdeps/unix')
-rw-r--r--sysdeps/unix/sysv/linux/chown.c68
-rw-r--r--sysdeps/unix/sysv/linux/syscalls.list1
2 files changed, 69 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/chown.c b/sysdeps/unix/sysv/linux/chown.c
new file mode 100644
index 0000000000..f380d93736
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/chown.c
@@ -0,0 +1,68 @@
+/* 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 <unistd.h>
+#include <sys/syscall.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.
+ The new lchown function has the same number as the old chown had and the
+ new chown has a new number. When compiling with headers from Linux > 2.1.8x
+ it's impossible to run this libc with older kernels. In these cases libc
+ has therefore to route calls to chown to the old chown function.
+*/
+
+extern int __syscall_chown (const char *__file,
+ uid_t __owner, gid_t __group);
+#ifdef __NR_lchown
+/* running under Linux 2.0 or < 2.1.8x */
+static int __libc_old_chown;
+
+
+int
+__chown (const char *file, uid_t owner, gid_t group)
+{
+ int result;
+
+ if (!__libc_old_chown)
+ {
+ int saved_errno = errno;
+ result = __syscall_chown (file, owner, group);
+
+ if (result >= 0 || errno != ENOSYS)
+ return result;
+
+ __set_errno (saved_errno);
+ __libc_old_chown = 1;
+ }
+
+ return __lchown (file, owner, group);
+}
+#else
+/* compiling under older kernels */
+int
+__chown (const char *file, uid_t owner, gid_t group)
+{
+ return __syscall_chown (file, owner, group);
+}
+#endif
+
+weak_alias (__chown, chown)
diff --git a/sysdeps/unix/sysv/linux/syscalls.list b/sysdeps/unix/sysv/linux/syscalls.list
index f55c3f6fff..d0ab7d2170 100644
--- a/sysdeps/unix/sysv/linux/syscalls.list
+++ b/sysdeps/unix/sysv/linux/syscalls.list
@@ -40,6 +40,7 @@ rt_sigprocmask - rt_sigprocmask 4 __syscall_rt_sigprocmask
rt_sigqueueinfo - rt_sigqueueinfo 3 __syscall_rt_sigqueueinfo
rt_sigsuspend - rt_sigsuspend 2 __syscall_rt_sigsuspend
rt_sigtimedwait - rt_sigtimedwait 4 __syscall_rt_sigtimedwait
+s_chown chown chown 3 __syscall_chown
s_getdents EXTRA getdents 3 __getdents
s_getpriority getpriority getpriority 2 __syscall_getpriority
s_getresgid getresgid getresgid 3 __syscall_getresgid