Remove obsolete replacement system() on darwin
Per comment in the file, this was fixed around OS X 10.2.
This commit is contained in:
Peter Eisentraut
parent
c5d4f40cb5
commit
1d2e73a3df
@ -23,9 +23,6 @@ include $(top_builddir)/src/Makefile.global
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OBJS = atomics.o dynloader.o pg_sema.o pg_shmem.o $(TAS)
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ifeq ($(PORTNAME), darwin)
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SUBDIRS += darwin
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endif
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ifeq ($(PORTNAME), win32)
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SUBDIRS += win32
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endif
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@ -44,5 +41,4 @@ endif
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distclean clean:
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rm -f tas_cpp.s
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$(MAKE) -C darwin clean
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$(MAKE) -C win32 clean
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@ -1,17 +0,0 @@
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#-------------------------------------------------------------------------
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#
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# Makefile--
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# Makefile for port/darwin
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#
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# IDENTIFICATION
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# src/backend/port/darwin/Makefile
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#
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#-------------------------------------------------------------------------
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subdir = src/backend/port/darwin
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top_builddir = ../../../..
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include $(top_builddir)/src/Makefile.global
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OBJS = system.o
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include $(top_srcdir)/src/backend/common.mk
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@ -1,36 +0,0 @@
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src/backend/port/darwin/README
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Darwin
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======
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The file system.c included herein is taken directly from Apple's Darwin
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open-source CVS archives, and is redistributed under the BSD copyright
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notice it bears. (According to Apple's CVS logs, their version is
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identical to the FreeBSD original.) It provides our own implementation of
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the system(3) function, which ought by all rights to be identical to the
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one provided in libc on Darwin machines. Nonetheless, this version works,
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whereas the one that actually ships with Mac OS X 10.1 doesn't. The
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shipped version appears to disconnect the calling process from any shared
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memory segments it is attached to. (The symptom seen in PostgreSQL is
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that a backend attempting to execute CREATE DATABASE core-dumps.) I would
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love to know why there is a discrepancy between the published source and
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the actual behavior --- tgl 7-Nov-2001.
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Appropriate bug reports have been filed with Apple --- see
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Radar Bug#s 2767956, 2683531, 2805147. One hopes we can retire this
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kluge in the not too distant future.
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As of PostgreSQL 7.3 and Mac OS X 10.1, one should expect warnings
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like these while linking the backend:
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/usr/bin/ld: warning unused multiple definitions of symbol _system
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port/SUBSYS.o definition of _system in section (__TEXT,__text)
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/usr/lib/libm.dylib(system.o) unused definition of _system
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These are due to overriding system() per the above-described hack.
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The bug appears to be repaired in OS X 10.2.6 and later (possibly in
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earlier 10.2.* as well, but no systems handy to check). We #ifdef out
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the substitute system() definition on 10.3 and later.
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@ -1,104 +0,0 @@
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/*
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* src/backend/port/darwin/system.c
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*
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* only needed in OS X 10.1 and possibly early 10.2 releases */
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#include <AvailabilityMacros.h> /* pgrminclude ignore */
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#if MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_2 || !defined(MAC_OS_X_VERSION_10_2)
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/*
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* Copyright (c) 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD: src/lib/libc/stdlib/system.c,v 1.6 2000/03/16 02:14:41 jasone Exp $
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)system.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/wait.h>
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#include <signal.h>
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#include <unistd.h>
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#include <paths.h>
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#include <errno.h>
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int system(const char *command);
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int
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system(const char *command)
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{
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pid_t pid;
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int pstat;
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struct sigaction ign,
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intact,
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quitact;
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sigset_t newsigblock,
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oldsigblock;
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if (!command) /* just checking... */
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return (1);
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/*
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* Ignore SIGINT and SIGQUIT, block SIGCHLD. Remember to save existing
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* signal dispositions.
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*/
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ign.sa_handler = SIG_IGN;
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(void) sigemptyset(&ign.sa_mask);
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ign.sa_flags = 0;
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(void) sigaction(SIGINT, &ign, &intact);
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(void) sigaction(SIGQUIT, &ign, &quitact);
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(void) sigemptyset(&newsigblock);
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(void) sigaddset(&newsigblock, SIGCHLD);
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(void) sigprocmask(SIG_BLOCK, &newsigblock, &oldsigblock);
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switch (pid = fork())
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{
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case -1: /* error */
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break;
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case 0: /* child */
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/*
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* Restore original signal dispositions and exec the command.
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*/
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(void) sigaction(SIGINT, &intact, NULL);
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(void) sigaction(SIGQUIT, &quitact, NULL);
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(void) sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
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execl(_PATH_BSHELL, "sh", "-c", command, (char *) NULL);
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_exit(127);
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default: /* parent */
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do
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{
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pid = wait4(pid, &pstat, 0, (struct rusage *) 0);
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} while (pid == -1 && errno == EINTR);
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break;
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}
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(void) sigaction(SIGINT, &intact, NULL);
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(void) sigaction(SIGQUIT, &quitact, NULL);
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(void) sigprocmask(SIG_SETMASK, &oldsigblock, NULL);
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return (pid == -1 ? -1 : pstat);
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}
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#endif /* OS X < 10.3 */
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