1 /* $NetBSD: hasmntopt.c,v 1.1.1.3 2015/01/17 16:34:18 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2014 Erez Zadok 5 * Copyright (c) 1990 Jan-Simon Pendry 6 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine 7 * Copyright (c) 1990 The Regents of the University of California. 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to Berkeley by 11 * Jan-Simon Pendry at Imperial College, London. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 n * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * 38 * File: am-utils/libamu/hasmntopt.c 39 * 40 */ 41 42 #ifdef HAVE_CONFIG_H 43 # include <config.h> 44 #endif /* HAVE_CONFIG_H */ 45 #include <am_defs.h> 46 #include <amu.h> 47 48 #ifndef MNTMAXSTR 49 # define MNTMAXSTR 256 50 #endif /* not MNTMAXSTR */ 51 52 53 /* 54 * Some systems don't provide these to the user, 55 * but amd needs them, so... 56 * 57 * From: Piete Brooks <pb@cl.cam.ac.uk> 58 */ 59 static char * 60 nextmntopt(char **p) 61 { 62 char *cp = *p; 63 char *rp; 64 65 /* 66 * Skip past white space 67 */ 68 while (*cp && isspace((unsigned char) *cp)) 69 cp++; 70 71 /* 72 * Word starts here 73 */ 74 rp = cp; 75 76 /* 77 * Scan to send of string or separator 78 */ 79 while (*cp && *cp != ',') 80 cp++; 81 82 /* 83 * If separator found the overwrite with null char. 84 */ 85 if (*cp) { 86 *cp = '\0'; 87 cp++; 88 } 89 90 /* 91 * Return value for next call 92 */ 93 *p = cp; 94 return rp; 95 } 96 97 98 /* 99 * replacement for hasmntopt if the system does not have it. 100 */ 101 char * 102 amu_hasmntopt(mntent_t *mnt, char *opt) 103 { 104 char t[MNTMAXSTR]; 105 char *f; 106 char *o = t; 107 size_t l = strlen(opt); 108 109 xstrlcpy(t, mnt->mnt_opts, sizeof(t)); 110 111 while (*(f = nextmntopt(&o))) 112 if (NSTREQ(opt, f, l)) 113 return f - t + mnt->mnt_opts; 114 115 return 0; 116 } 117