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Annotation of 40BSD/cmd/uucp/shio.c, revision 1.1

1.1     ! root        1: #include "uucp.h"
        !             2: 
        !             3: 
        !             4: /*******
        !             5:  *     shio(cmd, fi, fo, user) execute shell of command with
        !             6:  *     char *cmd, *fi, *fo;    fi and fo as standard input/output
        !             7:  *     char *user;             user name
        !             8:  *
        !             9:  *     return codes:
        !            10:  *             0  - ok
        !            11:  *             non zero -  failed  -  status from child
        !            12:  */
        !            13: 
        !            14: shio(cmd, fi, fo, user)
        !            15: char *cmd, *fi, *fo, *user;
        !            16: {
        !            17:        int status, f;
        !            18:        int uid, pid, ret;
        !            19:        char path[MAXFULLNAME];
        !            20: 
        !            21:        if (fi == NULL)
        !            22:                fi = "/dev/null";
        !            23:        if (fo == NULL)
        !            24:                fo = "/dev/null";
        !            25: 
        !            26:        DEBUG(3, "shio - %s\n", cmd);
        !            27:        if ((pid = fork()) == 0) {
        !            28:                close(Ifn);
        !            29:                close(Ofn);
        !            30:                close(0);
        !            31:                f = open(fi, 0);
        !            32:                ASSERT(f == 0, "BAD OPEN fileno %d", f);
        !            33:                close(1);
        !            34:                f = creat(fo, 0666);
        !            35:                ASSERT(f == 1, "BAD OPEN fileno %d", f);
        !            36:                if (gninfo(user, &uid, path) == 0)
        !            37:                        setuid(uid);
        !            38:                execl(SHELL, "sh", "-c", cmd, 0);
        !            39:                exit(100);
        !            40:        }
        !            41:        while ((ret = wait(&status)) != pid && ret != -1);
        !            42:        DEBUG(3, "status %d\n", status);
        !            43:        return(status);
        !            44: }

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