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Annotation of researchv10no/cmd/odist/opkg/gid.c, revision 1.1

1.1     ! root        1: #include "asd.h"
        !             2: #include <grp.h>
        !             3: #include <stdio.h>
        !             4: #include <stdlib.h>
        !             5: #include <string.h>
        !             6: #include <unistd.h>
        !             7: 
        !             8: #define CHUNK 16
        !             9: 
        !            10: static struct gtab {
        !            11:        unsigned gid;
        !            12:        char *name;
        !            13: } *gtab;
        !            14: 
        !            15: static int size, salloc;
        !            16: 
        !            17: char *
        !            18: gidstr (gid_t gid)
        !            19: {
        !            20:        register int i;
        !            21:        static char buf[12];
        !            22:        struct group *g;
        !            23: 
        !            24:        /* search the cache for the gid */
        !            25:        for (i = 0; i < size; i++)
        !            26:                if (gtab[i].gid == gid)
        !            27:                        return gtab[i].name;
        !            28: 
        !            29:        /* try to find it in the system's database */
        !            30:        if (g = getgrgid(gid)) {
        !            31:                if (size % CHUNK == 0)
        !            32:                        gtab = (struct gtab *) ralloc((char *) gtab, salloc += CHUNK);
        !            33:                gtab[size].gid = g->gr_gid;
        !            34:                gtab[size].name = copy(g->gr_name);
        !            35:                ++size;
        !            36:                return gtab[size - 1].name;
        !            37:        }
        !            38: 
        !            39:        /* failure, invent a string */
        !            40:        sprintf (buf, "#%u", gid);
        !            41:        return buf;
        !            42: }
        !            43: 
        !            44: gid_t
        !            45: gidnum (char *name)
        !            46: {
        !            47:        register int i;
        !            48:        struct group *g;
        !            49: 
        !            50:        /* if it starts with a #, use the number */
        !            51:        if (name[0] == '#')
        !            52:                return atoi (name + 1);
        !            53: 
        !            54:        /* search the cache */
        !            55:        for (i = 0; i < size; i++)
        !            56:                if (strcmp (gtab[i].name, name) == 0)
        !            57:                        return gtab[i].gid;
        !            58: 
        !            59:        /* try to find it in the system's database */
        !            60:        if (g = getgrnam(name)) {
        !            61:                if (size % CHUNK == 0)
        !            62:                        gtab = (struct gtab *) ralloc((char *) gtab, salloc += CHUNK);
        !            63:                gtab[size].gid = g->gr_gid;
        !            64:                gtab[size].name = copy(g->gr_name);
        !            65:                ++size;
        !            66:                return gtab[size - 1].gid;
        !            67:        }
        !            68: 
        !            69: 
        !            70:        /* failure, invent a value */
        !            71:        return getgid();
        !            72: }

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