77 lines
2.8 KiB
C
77 lines
2.8 KiB
C
/*
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* Copyright (c) 1988 The Regents of the University of California.
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* 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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)system.c 5.10 (Berkeley) 2/23/91";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <sys/signal.h>
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#include <sys/wait.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <paths.h>
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system(command)
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const char *command;
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{
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union wait pstat;
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pid_t pid;
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int omask;
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sig_t intsave, quitsave;
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if (!command) /* just checking... */
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return(1);
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omask = sigblock(sigmask(SIGCHLD));
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switch(pid = vfork()) {
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case -1: /* error */
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(void)sigsetmask(omask);
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pstat.w_status = 0;
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pstat.w_retcode = 127;
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return(pstat.w_status);
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case 0: /* child */
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(void)sigsetmask(omask);
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execl(_PATH_BSHELL, "sh", "-c", command, (char *)NULL);
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_exit(127);
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}
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intsave = signal(SIGINT, SIG_IGN);
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quitsave = signal(SIGQUIT, SIG_IGN);
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pid = waitpid(pid, (int *)&pstat, 0);
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(void)sigsetmask(omask);
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(void)signal(SIGINT, intsave);
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(void)signal(SIGQUIT, quitsave);
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return(pid == -1 ? -1 : pstat.w_status);
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}
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