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Annotation of researchv10no/cmd/uucp/chremdir.c, revision 1.1

1.1     ! root        1: /*     /sccs/src/cmd/uucp/s.chremdir.c
        !             2:        chremdir.c      1.1     8/30/84 17:37:02
        !             3: */
        !             4: #include "uucp.h"
        !             5: VERSION(@(#)chremdir.c 1.1);
        !             6: 
        !             7: /*
        !             8:  * chremdir(sys)
        !             9:  * char        *sys;
        !            10:  *
        !            11:  * create SPOOL/sys directory and chdir to it
        !            12:  * side effect: set RemSpool
        !            13:  */
        !            14: void
        !            15: chremdir(sys)
        !            16: char   *sys;
        !            17: {
        !            18:        int     ret;
        !            19: 
        !            20:        mkremdir(sys);  /* set RemSpool, makes sure it exists */
        !            21:        DEBUG(6, "chdir(%s)\n", RemSpool);
        !            22:        ret = chdir(RemSpool);
        !            23:        ASSERT(ret == 0, Ct_CHDIR, RemSpool, errno);
        !            24:        (void) strcpy(Wrkdir, RemSpool);
        !            25:        return;
        !            26: }
        !            27: 
        !            28: /*
        !            29:  * mkremdir(sys)
        !            30:  * char        *sys;
        !            31:  *
        !            32:  * create SPOOL/sys directory
        !            33:  */
        !            34: 
        !            35: void
        !            36: mkremdir(sys)
        !            37: char   *sys;
        !            38: {
        !            39:        (void) sprintf(RemSpool, "%s/%s", SPOOL, sys);
        !            40:        do {
        !            41:                (void) mkdirs2(RemSpool, DIRMASK);
        !            42:        } while (mkdirlock() == 0);
        !            43:        return;
        !            44: }
        !            45: 
        !            46: /*
        !            47:  * put a file in the spool directory
        !            48:  * so it won't be empty, so rm won't rm it
        !            49:  * it's not really a lockfile, but we have good ways of cleaning up
        !            50:  */
        !            51: 
        !            52: #define        HUGE    10000
        !            53: 
        !            54: static int
        !            55: mkdirlock()
        !            56: {
        !            57:        char buf[BUFSIZ];
        !            58:        extern int errno;
        !            59: 
        !            60:        sprintf(buf, "%s/L.%d", RemSpool, getpid());
        !            61:        if (access(buf, 0) >= 0)
        !            62:                return (1);
        !            63:        if (ulockf(buf, HUGE) != FAIL)
        !            64:                return (1);
        !            65:        ASSERT(errno == ENOENT, "spool dir screwup", buf, errno);
        !            66:        return (0);
        !            67: }

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