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Annotation of 43BSD/ingres/source/monitor/shell.c, revision 1.1

1.1     ! root        1: # include      "monitor.h"
        !             2: # include      <ingres.h>
        !             3: # include      <aux.h>
        !             4: # include      <opsys.h>
        !             5: # include      <sccs.h>
        !             6: 
        !             7: SCCSID(@(#)shell.c     8.1     12/31/84)
        !             8: 
        !             9: 
        !            10: 
        !            11: /*
        !            12: **  SHELL -- call unix shell
        !            13: **
        !            14: **     The UNIX shell is called.  Shell() first tries to call an
        !            15: **     alternate shell defined by the macro {shell}, and if it fails
        !            16: **     calls /bin/sh.
        !            17: **
        !            18: **     If an argument is supplied, it is a shell file which is
        !            19: **     supplied to the shell.
        !            20: **
        !            21: **     Trace Flags:
        !            22: **             34
        !            23: */
        !            24: 
        !            25: shell()
        !            26: {
        !            27:        register int    i;
        !            28:        register char   *p;
        !            29:        register char   *shellfile;
        !            30:        extern char     *getfilenm();
        !            31:        extern char     *macro();
        !            32: 
        !            33:        shellfile = getfilenm();
        !            34:        if (*shellfile == 0)
        !            35:                shellfile = 0;
        !            36: 
        !            37:        fclose(Qryiop);
        !            38:        if ((Xwaitpid = fork()) == -1)
        !            39:                syserr("shell: fork");
        !            40:        if (Xwaitpid == 0)
        !            41:        {
        !            42:                setuid(getuid());
        !            43: #              ifndef xB_UNIX
        !            44:                setgid(getgid());
        !            45: #              endif
        !            46:                for (i = 3; i < NOFILE; i++)
        !            47:                        close(i);
        !            48:                p = macro("{shell}");
        !            49: #              ifdef xMTR3
        !            50:                tTfp(34, 0, "{shell} = '%o'\n", p);
        !            51: #              endif
        !            52:                if (p != 0)
        !            53:                {
        !            54:                        execl(p, p, shellfile, Qbname, 0);
        !            55:                        printf("Cannot call %s; using /bin/sh\n", p);
        !            56:                }
        !            57:                execl("/bin/sh", "sh", shellfile, Qbname, 0);
        !            58:                syserr("shell: exec");
        !            59:        }
        !            60: 
        !            61:        if (Nodayfile >= 0)
        !            62:                printf(">>shell\n");
        !            63:        /* wait for shell to complete */
        !            64:        xwait();
        !            65: }

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