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

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

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