37 lines
749 B
C
37 lines
749 B
C
/* $Header$ */
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#include <signal.h>
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system(str)
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char *str;
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{
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int pid, exitstatus, waitval;
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void (*sigint)(), (*sigquit)();
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int i;
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if ((pid = fork()) < 0) return -1; /* How do we distinguish this
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from exit status -1?
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*/
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if (pid == 0) {
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for (i = 3; i <= 20; i++) close(i);
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execl("/bin/sh", "sh", "-c", str, (char *) 0);
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/* get here if execl fails ... */
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_exit(127); /* see manual page */
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}
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sigint = signal( SIGINT, SIG_IGN );
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sigquit = signal( SIGQUIT, SIG_IGN );
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while ((waitval = wait(&exitstatus)) != pid) {
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if (waitval == -1) break;
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}
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if (waitval == -1) {
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/* no child ??? or maybe interrupted ??? */
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exitstatus = -1;
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}
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signal( SIGINT, sigint );
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signal( SIGQUIT, sigquit );
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return exitstatus;
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}
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