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Annotation of coherent/b/lib/libc/gen/system.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Call the system to execute a command line
        !             3:  * which is passed as an argument.
        !             4:  */
        !             5: 
        !             6: #include <stdio.h>
        !             7: #include <signal.h>
        !             8: 
        !             9: system(line)
        !            10: char *line;
        !            11: {
        !            12:        int status, pid;
        !            13:        register wpid;
        !            14:        register int (*intfun)(), (*quitfun)();
        !            15: 
        !            16:        if ((pid = fork()) < 0)
        !            17:                return (-1);
        !            18:        if (pid == 0) {         /* Child */
        !            19:                execl("/bin/sh", "sh", "-c", line, NULL);
        !            20:                exit(0177);
        !            21:        }
        !            22:        intfun = signal(SIGINT, SIG_IGN);
        !            23:        quitfun = signal(SIGQUIT, SIG_IGN);
        !            24:        while ((wpid = wait(&status))!=pid && wpid>=0)
        !            25:                ;
        !            26:        if (wpid < 0)
        !            27:                status = wpid;
        !            28:        signal(SIGINT, intfun);
        !            29:        signal(SIGQUIT, quitfun);
        !            30:        return (status);
        !            31: }

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