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Annotation of researchv10no/cmd/odist/opkg/gid.c, revision 1.1.1.1

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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