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Annotation of embedaddon/sudo/common/atoid.c, revision 1.1.1.1

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: }