99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
/*
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* spawnvp function
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*
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* Copyright 2003 Dimitrie O. Paun
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*
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* This 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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*
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* This 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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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#ifndef HAVE__SPAWNVP
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#include <errno.h>
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#include <signal.h>
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#include <stdlib.h>
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#include <sys/stat.h>
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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int _spawnvp(int mode, const char *cmdname, const char *const argv[])
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{
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int pid, status, wret;
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if (mode == _P_OVERLAY)
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{
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execvp(cmdname, (char **)argv);
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/* if we get here it failed */
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#ifdef ENOTSUP
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if (errno != ENOTSUP) /* exec fails on MacOS if the process has multiple threads */
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#endif
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return -1;
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}
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pid = fork();
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if (pid == 0)
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{
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/* in child */
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if (mode == _P_DETACH)
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{
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pid = fork();
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if (pid == -1) _exit(1);
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else if (pid > 0) _exit(0);
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/* else in grandchild */
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}
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signal( SIGPIPE, SIG_DFL );
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execvp(cmdname, (char **)argv);
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_exit(1);
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}
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if (pid == -1)
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return -1;
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if (mode == _P_OVERLAY) exit(0);
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if (mode == _P_WAIT || mode == _P_DETACH)
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{
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while (pid != (wret = waitpid(pid, &status, 0)))
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if (wret == -1 && errno != EINTR) break;
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if (pid == wret && WIFEXITED(status))
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{
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if (mode == _P_WAIT)
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pid = WEXITSTATUS(status);
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else /* mode == _P_DETACH */
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if (WEXITSTATUS(status) != 0) /* child couldn't fork grandchild */
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pid = -1;
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}
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else
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{
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if (mode == _P_WAIT)
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pid = 255; /* abnormal exit with an abort or an interrupt */
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else /* mode == _P_DETACH */
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pid = -1;
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}
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}
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return pid;
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}
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#endif /* HAVE__SPAWNVP */
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