From f006d3a007b7caffd4c810fa71623b39334a1580 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Tue, 11 Mar 2003 19:02:26 +0000 Subject: Update. * sysdeps/unix/sysv/linux/ia64/system.c: New file. * sysdeps/unix/sysv/linux/kernel-features.h (__ASSUME_CLONE_THREAD_FLAGS): Define for IA-64 and s390* with kernel >= 2.5.64. 2003-03-11 Jakub Jelinek * sysdeps/unix/sysv/linux/powerpc/powerpc64/clone.S: Don't clobber R7. --- sysdeps/unix/sysv/linux/ia64/system.c | 74 +++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) create mode 100644 sysdeps/unix/sysv/linux/ia64/system.c (limited to 'sysdeps/unix/sysv/linux/ia64') diff --git a/sysdeps/unix/sysv/linux/ia64/system.c b/sysdeps/unix/sysv/linux/ia64/system.c new file mode 100644 index 0000000000..db4fcfe015 --- /dev/null +++ b/sysdeps/unix/sysv/linux/ia64/system.c @@ -0,0 +1,74 @@ +/* Copyright (C) 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 +#include +#include +#include +#include +#include +#include + +/* We have to and actually can handle cancelable system(). The big + problem: we have to kill the child process if necessary. To do + this a cleanup handler has to be registered and is has to be able + to find the PID of the child. The main problem is to reliable have + the PID when needed. It is not necessary for the parent thread to + return. It might still be in the kernel when the cancellation + request comes. Therefore we have to use the clone() calls ability + to have the kernel write the PID into the user-level variable. */ +#ifdef __ASSUME_CLONE_THREAD_FLAGS +# define FORK() \ + INLINE_SYSCALL (clone2, 6, CLONE_PARENT_SETTID | SIGCHLD, NULL, 0, \ + NULL, &pid, NULL) +#endif + +static void cancel_handler (void *arg); + +#define CLEANUP_HANDLER \ + __libc_cleanup_region_start (1, cancel_handler, &pid) + +#define CLEANUP_RESET \ + __libc_cleanup_region_end (0) + + +/* Linux has waitpid(), so override the generic unix version. */ +#include + + +/* The cancellation handler. */ +static void +cancel_handler (void *arg) +{ + pid_t child = *(pid_t *) arg; + + INTERNAL_SYSCALL_DECL (err); + INTERNAL_SYSCALL (kill, err, 2, child, SIGKILL); + + TEMP_FAILURE_RETRY (__waitpid (child, NULL, 0)); + + DO_LOCK (); + + if (SUB_REF () == 0) + { + (void) __sigaction (SIGQUIT, &quit, (struct sigaction *) NULL); + (void) __sigaction (SIGINT, &intr, (struct sigaction *) NULL); + } + + DO_UNLOCK (); +} -- cgit v1.2.3