1 /* $OpenBSD: filesys-os.c,v 1.12 2015/01/16 06:40:11 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 1983 Regents of the University of California. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/types.h> 33 #include <sys/mount.h> 34 35 #include "defs.h" 36 37 /* 38 * OS specific file system routines 39 */ 40 41 static struct statfs *mnt = NULL; 42 static int entries_left; 43 44 /* 45 * getfsstat() version of get mount info routines. 46 */ 47 int 48 setmountent(void) 49 { 50 long size; 51 52 size = getfsstat(NULL, 0, MNT_WAIT); 53 if (size == -1) 54 return (0); 55 56 free(mnt); 57 size *= sizeof(struct statfs); 58 mnt = xmalloc(size); 59 60 entries_left = getfsstat(mnt, size, MNT_WAIT); 61 if (entries_left == -1) 62 return (0); 63 64 return (1); 65 } 66 67 /* 68 * getfsstat() version of getmountent() 69 */ 70 mntent_t * 71 getmountent(void) 72 { 73 static mntent_t mntstruct; 74 static char remote_dev[HOST_NAME_MAX+1 + PATH_MAX + 1]; 75 76 if (!entries_left) 77 return (NULL); 78 79 memset(&mntstruct, 0, sizeof(mntstruct)); 80 81 if (mnt->f_flags & MNT_RDONLY) 82 mntstruct.me_flags |= MEFLAG_READONLY; 83 84 if (strcmp(mnt->f_fstypename, "nfs") == 0) { 85 strlcpy(remote_dev, mnt->f_mntfromname, sizeof(remote_dev)); 86 mntstruct.me_path = remote_dev; 87 mntstruct.me_type = METYPE_NFS; 88 } else { 89 mntstruct.me_path = mnt->f_mntonname; 90 mntstruct.me_type = METYPE_OTHER; 91 } 92 93 mnt++; 94 entries_left--; 95 96 return (&mntstruct); 97 } 98 99 /* 100 * Done with iterations 101 */ 102 void 103 endmountent(void) 104 { 105 free(mnt); 106 mnt = NULL; 107 } 108 109 /* 110 * Make a new (copy) of a mntent structure. 111 */ 112 mntent_t * 113 newmountent(const mntent_t *old) 114 { 115 mntent_t *new; 116 117 new = xmalloc(sizeof *new); 118 new->me_path = xstrdup(old->me_path); 119 new->me_type = xstrdup(old->me_type); 120 new->me_flags = old->me_flags; 121 122 return (new); 123 } 124