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Annotation of embedaddon/sudo/common/gidlist.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (c) 2013 Todd C. Miller <Todd.Miller@courtesan.com>
        !             3:  *
        !             4:  * Permission to use, copy, modify, and distribute this software for any
        !             5:  * purpose with or without fee is hereby granted, provided that the above
        !             6:  * copyright notice and this permission notice appear in all copies.
        !             7:  *
        !             8:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
        !             9:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
        !            10:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
        !            11:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
        !            12:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
        !            13:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
        !            14:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
        !            15:  */
        !            16: 
        !            17: #include <config.h>
        !            18: 
        !            19: #include <sys/types.h>
        !            20: 
        !            21: #include <stdio.h>
        !            22: #ifdef STDC_HEADERS
        !            23: # include <stdlib.h>
        !            24: # include <stddef.h>
        !            25: #else
        !            26: # ifdef HAVE_STDLIB_H
        !            27: #  include <stdlib.h>
        !            28: # endif
        !            29: #endif /* STDC_HEADERS */
        !            30: #include <grp.h>
        !            31: 
        !            32: #define DEFAULT_TEXT_DOMAIN    "sudo"
        !            33: #include "gettext.h"
        !            34: 
        !            35: #include "missing.h"
        !            36: #include "alloc.h"
        !            37: #include "fatal.h"
        !            38: #include "sudo_debug.h"
        !            39: 
        !            40: extern id_t atoid(const char *p, const char *sep, char **endp, const char **errstr);
        !            41: 
        !            42: /*
        !            43:  * Parse a comma-separated list of gids into an allocated array of GETGROUPS_T.
        !            44:  * If a pointer to the base gid is specified, it is stored as the first element
        !            45:  * in the array.
        !            46:  * Returns the number of gids in the allocated array.
        !            47:  * Calls fatalx() on error.
        !            48:  */
        !            49: int
        !            50: parse_gid_list(const char *gidstr, const gid_t *basegid, GETGROUPS_T **gidsp)
        !            51: {
        !            52:     int ngids = 0;
        !            53:     GETGROUPS_T *gids;
        !            54:     const char *cp = gidstr;
        !            55:     const char *errstr;
        !            56:     char *ep;
        !            57:     debug_decl(atoid, SUDO_DEBUG_UTIL)
        !            58: 
        !            59:     /* Count groups. */
        !            60:     if (*cp != '\0') {
        !            61:        ngids++;
        !            62:        do {
        !            63:            if (*cp++ == ',')
        !            64:                ngids++;
        !            65:        } while (*cp != '\0');
        !            66:     }
        !            67:     /* Base gid is optional. */
        !            68:     if (basegid != NULL)
        !            69:        ngids++;
        !            70:     /* Allocate and fill in array. */
        !            71:     if (ngids != 0) {
        !            72:        gids = emalloc2(ngids, sizeof(GETGROUPS_T));
        !            73:        ngids = 0;
        !            74:        if (basegid != NULL)
        !            75:            gids[ngids++] = *basegid;
        !            76:        cp = gidstr;
        !            77:        do {
        !            78:            gids[ngids] = (GETGROUPS_T) atoid(cp, ",", &ep, &errstr);
        !            79:            if (errstr != NULL) {
        !            80:                warningx(_("%s: %s"), cp, _(errstr));
        !            81:                free(gids);
        !            82:                debug_return_int(-1);
        !            83:            }
        !            84:            if (basegid == NULL || gids[ngids] != *basegid)
        !            85:                ngids++;
        !            86:            cp = ep + 1;
        !            87:        } while (*ep != '\0');
        !            88:        *gidsp = gids;
        !            89:     }
        !            90:     debug_return_int(ngids);
        !            91: }