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Annotation of 42BSD/usr.bin/uucp/shio.c, revision 1.1.1.1

1.1       root        1: #ifndef lint
                      2: static char sccsid[] = "@(#)shio.c     5.1 (Berkeley) 7/2/83";
                      3: #endif
                      4: 
                      5: #include "uucp.h"
                      6: #include <signal.h>
                      7: 
                      8: 
                      9: /*******
                     10:  *     shio(cmd, fi, fo, user) execute shell of command with
                     11:  *     char *cmd, *fi, *fo;    fi and fo as standard input/output
                     12:  *     char *user;             user name
                     13:  *
                     14:  *     return codes:
                     15:  *             0  - ok
                     16:  *             non zero -  failed  -  status from child
                     17:  */
                     18: 
                     19: shio(cmd, fi, fo, user)
                     20: char *cmd, *fi, *fo, *user;
                     21: {
                     22:        int status, f;
                     23:        int uid, pid, ret;
                     24:        char path[MAXFULLNAME];
                     25: 
                     26:        if (fi == NULL)
                     27:                fi = "/dev/null";
                     28:        if (fo == NULL)
                     29:                fo = "/dev/null";
                     30: 
                     31:        DEBUG(3, "shio - %s\n", cmd);
                     32:        if ((pid = fork()) == 0) {
                     33:                signal(SIGINT, SIG_IGN);
                     34:                signal(SIGHUP, SIG_IGN);
                     35:                signal(SIGQUIT, SIG_IGN);
                     36:                signal(SIGKILL, SIG_IGN);
                     37:                close(Ifn);
                     38:                close(Ofn);
                     39:                close(0);
                     40:                if (user == NULL
                     41:                || (gninfo(user, &uid, path) != 0)
                     42:                || setuid(uid))
                     43:                        setuid(getuid());
                     44:                f = open(subfile(fi), 0);
                     45:                if (f != 0)
                     46:                        exit(f);
                     47:                close(1);
                     48:                f = creat(subfile(fo), 0666);
                     49:                if (f != 1)
                     50:                        exit(f);
                     51:                execl(SHELL, "sh", "-c", cmd, (char *)0);
                     52:                exit(100);
                     53:        }
                     54:        while ((ret = wait(&status)) != pid && ret != -1);
                     55:        DEBUG(3, "status %d\n", status);
                     56:        return(status);
                     57: }

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