1 /*- 2 * Copyright (C) 2015 Baptiste Daroussin <bapt@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer 10 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <errno.h> 31 #include <inttypes.h> 32 #include <limits.h> 33 #include <stdlib.h> 34 35 #include "pw.h" 36 37 uintmax_t 38 strtounum(const char * __restrict np, uintmax_t minval, uintmax_t maxval, 39 const char ** __restrict errpp) 40 { 41 char *endp; 42 uintmax_t ret; 43 44 *errpp = NULL; 45 if (minval > maxval) { 46 errno = EINVAL; 47 if (errpp != NULL) 48 *errpp = "invalid"; 49 return (0); 50 } 51 errno = 0; 52 ret = strtoumax(np, &endp, 10); 53 if (endp == np || *endp != '\0') { 54 errno = EINVAL; 55 if (errpp != NULL) 56 *errpp = "invalid"; 57 return (0); 58 } 59 if (ret < minval) { 60 errno = ERANGE; 61 if (errpp != NULL) 62 *errpp = "too small"; 63 return (0); 64 } 65 if (errno == ERANGE || ret > maxval) { 66 errno = ERANGE; 67 if (errpp != NULL) 68 *errpp = "too large"; 69 return (0); 70 } 71 return (ret); 72 } 73