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Diffstat (limited to 'mit-pthreads/stdlib/system.c')
| -rw-r--r-- | mit-pthreads/stdlib/system.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/mit-pthreads/stdlib/system.c b/mit-pthreads/stdlib/system.c new file mode 100644 index 00000000000..e7cc164fbc7 --- /dev/null +++ b/mit-pthreads/stdlib/system.c @@ -0,0 +1,83 @@ +/* + * Copyright (c) 1988 The Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +/*static char *sccsid = "from: @(#)system.c 5.10 (Berkeley) 2/23/91";*/ +static char *rcsid = "$Id$"; +#endif /* LIBC_SCCS and not lint */ + +#include <pthread.h> +#include <pthread/paths.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <signal.h> +#include <stdlib.h> +#include <stddef.h> +#include <unistd.h> + +extern char **environ; + +system(command) + const char *command; +{ + char *argp[] = {"sh", "-c", "*to be filled in*", NULL}; + void (*intsave)(), (*quitsave)(), (*signal())(); + sigset_t tmp_mask, old_mask; + int pstat; + pid_t pid; + + if (!command) /* just checking... */ + return(1); + + argp[2] = (char *) command; + sigemptyset(&tmp_mask); + sigaddset(&tmp_mask, SIGCHLD); + pthread_sigmask(SIG_BLOCK, &tmp_mask, &old_mask); + switch(pid = fork()) { + case -1: /* error */ + (void)pthread_sigmask(SIG_SETMASK, &old_mask, NULL); + return(-1); + case 0: /* child */ + (void)pthread_sigmask(SIG_SETMASK, &old_mask, NULL); + execve(_PATH_BSHELL, argp, environ); + _exit(127); + } + + intsave = pthread_signal(SIGINT, SIG_IGN); + quitsave = pthread_signal(SIGQUIT, SIG_IGN); + pid = waitpid(pid, (int *)&pstat, 0); + (void)pthread_sigmask(SIG_SETMASK, &old_mask, NULL); + (void)pthread_signal(SIGQUIT, quitsave); + (void)pthread_signal(SIGINT, intsave); + return(pid == -1 ? -1 : pstat); +} |