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Annotation of embedaddon/sudo/common/atoid.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: #if defined(HAVE_STDINT_H)
        !            31: # include <stdint.h>
        !            32: #elif defined(HAVE_INTTYPES_H)
        !            33: # include <inttypes.h>
        !            34: #endif
        !            35: #ifdef HAVE_STDBOOL_H
        !            36: # include <stdbool.h>
        !            37: #else
        !            38: # include "compat/stdbool.h"
        !            39: #endif
        !            40: #include <errno.h>
        !            41: #include <limits.h>
        !            42: 
        !            43: #define DEFAULT_TEXT_DOMAIN    "sudo"
        !            44: #include "gettext.h"
        !            45: 
        !            46: #include "missing.h"
        !            47: #include "sudo_debug.h"
        !            48: 
        !            49: /*
        !            50:  * Parse a uid/gid in string form.
        !            51:  * If sep is non-NULL, it contains valid separator characters (e.g. comma, space)
        !            52:  * If endp is non-NULL it is set to the next char after the ID.
        !            53:  * On success, returns the parsed ID and clears errstr.
        !            54:  * On error, returns 0 and sets errstr.
        !            55:  */
        !            56: id_t
        !            57: atoid(const char *p, const char *sep, char **endp, const char **errstr)
        !            58: {
        !            59:     char *ep;
        !            60:     id_t rval = 0;
        !            61:     bool valid = false;
        !            62:     debug_decl(atoid, SUDO_DEBUG_UTIL)
        !            63: 
        !            64:     if (sep == NULL)
        !            65:        sep = "";
        !            66:     errno = 0;
        !            67:     if (*p == '-') {
        !            68:        long lval = strtol(p, &ep, 10);
        !            69:        if (ep != p) {
        !            70:            /* check for valid separator (including '\0') */
        !            71:            do {
        !            72:                if (*ep == *sep)
        !            73:                    valid = true;
        !            74:            } while (*sep++ != '\0');
        !            75:        }
        !            76:        if (!valid) {
        !            77:            *errstr = N_("invalid value");
        !            78:            errno = EINVAL;
        !            79:            goto done;
        !            80:        }
        !            81:        if ((errno == ERANGE && (lval == LONG_MAX || lval == LONG_MIN)) ||
        !            82:            (lval > INT_MAX || lval < INT_MIN)) {
        !            83:            errno = ERANGE;
        !            84:            *errstr = N_("value out of range");
        !            85:            goto done;
        !            86:        }
        !            87:        rval = (id_t)lval;
        !            88:        *errstr = NULL;
        !            89:     } else {
        !            90:        unsigned long ulval = strtoul(p, &ep, 10);
        !            91:        if (ep != p) {
        !            92:            /* check for valid separator (including '\0') */
        !            93:            do {
        !            94:                if (*ep == *sep)
        !            95:                    valid = true;
        !            96:            } while (*sep++ != '\0');
        !            97:        }
        !            98:        if (!valid) {
        !            99:            *errstr = N_("invalid value");
        !           100:            errno = EINVAL;
        !           101:            goto done;
        !           102:        }
        !           103:        if ((errno == ERANGE && ulval == ULONG_MAX) || ulval > UINT_MAX) {
        !           104:            errno = ERANGE;
        !           105:            *errstr = N_("value too large");
        !           106:            goto done;
        !           107:        }
        !           108:        rval = (id_t)ulval;
        !           109:        *errstr = NULL;
        !           110:     }
        !           111:     if (endp != NULL)
        !           112:        *endp = ep;
        !           113: done:
        !           114:     debug_return_int(rval);
        !           115: }