mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-28 23:34:53 +03:00
d3c9f89525
2002-12-06 Ulrich Drepper <drepper@redhat.com> * misc/syslog.c (log_cleanup): New function. (openlog): Use log_cleanup instead of __libc_mutex_unlock. (closelog): Likewise. * elf/dl-close.c: Use __rtld_lock_* macros instead of __libc_lock_*. * elf/dl-iteratephdr.c: Likewise. * elf/dl-lookup.c: Likewise. * elf/dl-misc.c: Likewise. * elf/dl-open.c: Likewise. * elf/dl-support.c: Likewise. * elf/rtld.c: Likewise. * sysdeps/generic/ldsodefs.h: Likewise. * sysdeps/generic/bits/libc-lock.h: Define __rtld_lock_* macros. * sysdeps/mach/bits/libc-lock.h: Likewise. * sysdeps/mach/hurd/bits/libc-lock.h: Likewise. * dirent/bug-readdir1.c (main): Don't call closedir, just close
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/* Copyright (C) 2002 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
|
|
|
|
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 <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#include <sysdep.h>
|
|
#include <libio/libioP.h>
|
|
#include <tls.h>
|
|
#include "fork.h"
|
|
#include <bits/stdio-lock.h>
|
|
|
|
|
|
unsigned long int *__fork_generation_pointer;
|
|
|
|
|
|
lll_lock_t __fork_lock = LLL_LOCK_INITIALIZER;
|
|
LIST_HEAD (__fork_prepare_list);
|
|
LIST_HEAD (__fork_parent_list);
|
|
LIST_HEAD (__fork_child_list);
|
|
|
|
|
|
static void
|
|
fresetlockfiles (void)
|
|
{
|
|
_IO_ITER i;
|
|
|
|
for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i))
|
|
_IO_lock_init (*((_IO_lock_t *) _IO_iter_file(i)->_lock));
|
|
}
|
|
|
|
|
|
pid_t
|
|
__libc_fork (void)
|
|
{
|
|
pid_t pid;
|
|
list_t *runp;
|
|
|
|
/* Get the lock so that the set of registered handlers is not
|
|
inconsistent or changes beneath us. */
|
|
lll_lock (__fork_lock);
|
|
|
|
/* Run all the registered preparation handlers. In reverse order. */
|
|
list_for_each_prev (runp, &__fork_prepare_list)
|
|
{
|
|
struct fork_handler *curp;
|
|
|
|
curp = list_entry (runp, struct fork_handler, list);
|
|
|
|
curp->handler ();
|
|
}
|
|
|
|
_IO_list_lock ();
|
|
|
|
#ifdef ARCH_FORK
|
|
pid = ARCH_FORK ();
|
|
#else
|
|
# error "ARCH_FORK must be defined so that the CLONE_SETTID flag is used"
|
|
pid = INLINE_SYSCALL (fork, 0);
|
|
#endif
|
|
|
|
if (pid == 0)
|
|
{
|
|
if (__fork_generation_pointer != NULL)
|
|
*__fork_generation_pointer += 4;
|
|
|
|
/* Reset the file list. These are recursive mutexes. */
|
|
fresetlockfiles ();
|
|
|
|
/* We execute this even if the 'fork' call failed. */
|
|
_IO_list_resetlock ();
|
|
|
|
/* Run the handlers registered for the child. */
|
|
list_for_each (runp, &__fork_child_list)
|
|
{
|
|
struct fork_handler *curp;
|
|
|
|
curp = list_entry (runp, struct fork_handler, list);
|
|
|
|
curp->handler ();
|
|
}
|
|
|
|
/* Initialize the fork lock. */
|
|
__fork_lock = (lll_lock_t) LLL_LOCK_INITIALIZER;
|
|
}
|
|
else
|
|
{
|
|
/* We execute this even if the 'fork' call failed. */
|
|
_IO_list_unlock ();
|
|
|
|
/* Run the handlers registered for the parent. */
|
|
list_for_each (runp, &__fork_parent_list)
|
|
{
|
|
struct fork_handler *curp;
|
|
|
|
curp = list_entry (runp, struct fork_handler, list);
|
|
|
|
curp->handler ();
|
|
}
|
|
|
|
/* Release the for lock. */
|
|
lll_unlock (__fork_lock);
|
|
}
|
|
|
|
return pid;
|
|
}
|
|
weak_alias (__libc_fork, __fork)
|
|
weak_alias (__libc_fork, fork)
|