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authorUlrich Drepper <drepper@redhat.com>2003-09-04 14:08:24 +0000
committerUlrich Drepper <drepper@redhat.com>2003-09-04 14:08:24 +0000
commitce42435cab474eff0b7a8470d59bb484858a0863 (patch)
treee01965b8905deb70308aba0829853886ad43faa9 /sysdeps/unix/sysv/linux/fcntl.c
parenta452e4e6294ffb6d7362215cb0b10896e8a7631f (diff)
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Update.
* sysdeps/generic/utmp_file.c: Use not-cancelable syscalls all over the place. It would be allowed to have these fucntions as cancellation points but the cleanup would be ugly and a lot of work. * sysdeps/generic/not-cancel.h (fcntl_not_cancel): Define. * sysdeps/unix/sysv/linux/not-cancel.h (fcntl_not_cancel): Define. * include/fcntl.h (__fcntl_nocancel): Declare. * sysdeps/unix/sysv/linux/fcntl.c: New file. * sysdeps/unix/sysv/linux/i386/fcntl.c (__libc_fcntl): Only enable cancellation if absolutely needed. (__fcntl_nocancel): Define. * posix/unistd.h (gethostid): Remove __THROW. Clarify comment. * sysdeps/unix/sysv/linux/Makefile (CFLAGS-gethostid.c): Add -fexceptions. * sysdeps/unix/sysv/linux/gethostid.c (gethostid): Use extend_alloca. * resolv/res_init.c (__res_nclose): Use close_not_cancel_no_status instead of __close.
Diffstat (limited to 'sysdeps/unix/sysv/linux/fcntl.c')
-rw-r--r--sysdeps/unix/sysv/linux/fcntl.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/fcntl.c b/sysdeps/unix/sysv/linux/fcntl.c
new file mode 100644
index 0000000000..33651d3c10
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/fcntl.c
@@ -0,0 +1,60 @@
+/* Copyright (C) 2000, 2002, 2003 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+
+#include <sysdep-cancel.h>
+#include <sys/syscall.h>
+
+
+int
+__fcntl_nocancel (int fd, int cmd, void *arg)
+{
+ return INLINE_SYSCALL (fcntl, 3, fd, cmd, arg);
+}
+
+
+int
+__libc_fcntl (int fd, int cmd, ...)
+{
+ va_list ap;
+ void *arg;
+
+ va_start (ap, cmd);
+ arg = va_arg (ap, void *);
+ va_end (ap);
+
+ if (SINGLE_THREAD_P || cmd != F_SETLKW)
+ return __fcntl_nocancel (fd, cmd, arg);
+
+ int oldtype = LIBC_CANCEL_ASYNC ();
+
+ int result = __fcntl_nocancel (fd, cmd, arg);
+
+ LIBC_CANCEL_RESET (oldtype);
+
+ return result;
+}
+libc_hidden_def (__libc_fcntl)
+
+weak_alias (__libc_fcntl, __fcntl)
+libc_hidden_weak (__fcntl)
+weak_alias (__libc_fcntl, fcntl)