ce42435cab
* 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.
76 lines
2.8 KiB
C
76 lines
2.8 KiB
C
/* Uncancelable versions of cancelable interfaces. Linux/NPTL version.
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Copyright (C) 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep.h>
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#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
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extern int __open_nocancel (const char *, int, ...) attribute_hidden;
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extern int __close_nocancel (int) attribute_hidden;
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extern int __read_nocancel (int, void *, size_t) attribute_hidden;
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extern int __write_nocancel (int, const void *, size_t) attribute_hidden;
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extern pid_t __waitpid_nocancel (pid_t, int *, int) attribute_hidden;
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#else
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#define __open_nocancel(name, ...) __open (name, __VA_ARGS__)
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#define __close_nocancel(fd) __close (fd)
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#define __read_nocancel(fd, buf, len) __read (fd, buf, len)
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#define __write_nocancel(fd, buf, len) __write (fd, buf, len)
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#define __waitpid_nocancel(pid, stat_loc, options) \
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__waitpid (pid, stat_loc, options)
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#endif
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/* Uncancelable open. */
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#define open_not_cancel(name, flags, mode) \
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__open_nocancel (name, flags, mode)
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#define open_not_cancel_2(name, flags) \
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__open_nocancel (name, flags)
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/* Uncancelable close. */
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#define close_not_cancel(fd) \
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__close_nocancel (fd)
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#define close_not_cancel_no_status(fd) \
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(void) ({ INTERNAL_SYSCALL_DECL (err); \
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INTERNAL_SYSCALL (close, err, 1, (fd)); })
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/* Uncancelable read. */
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#define read_not_cancel(fd, buf, n) \
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__read_nocancel (fd, buf, n)
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/* Uncancelable write. */
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#define write_not_cancel(fd, buf, n) \
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__write_nocancel (fd, buf, n)
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/* Uncancelable writev. */
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#define writev_not_cancel_no_status(fd, iov, n) \
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(void) ({ INTERNAL_SYSCALL_DECL (err); \
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INTERNAL_SYSCALL (writev, err, 3, (fd), (iov), (n)); })
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/* Uncancelable fcntl. */
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#define fcntl_not_cancel(fd, cmd, val) \
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__fcntl_nocancel (fd, cmd, val)
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/* Uncancelable waitpid. */
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#ifdef __NR_waitpid
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# define waitpid_not_cancel(pid, stat_loc, options) \
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__waitpid_nocancel (pid, stat_loc, options)
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#else
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# define waitpid_not_cancel(pid, stat_loc, options) \
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INLINE_SYSCALL (wait4, 4, pid, stat_loc, options, NULL)
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#endif
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