1/* 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software donated to Berkeley by 6 * Jan-Simon Pendry. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#ifndef lint 38char copyright[] = 39"@(#) Copyright (c) 1992, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41#endif /* not lint */ 42 43#ifndef lint 44static char sccsid[] = "@(#)mount_union.c 8.5 (Berkeley) 3/27/94"; 45#endif /* not lint */ 46 47#include <sys/param.h> 48#include <sys/mount.h> 49 50#include <miscfs/union/union.h> 51 52#include <err.h> 53#include <stdio.h> 54#include <stdlib.h> 55#include <string.h> 56#include <unistd.h> 57 58#include "mntopts.h" 59 60struct mntopt mopts[] = { 61 MOPT_STDOPTS, 62 { NULL } 63}; 64 65int subdir __P((const char *, const char *)); 66void usage __P((void)); 67 68int 69main(argc, argv) 70 int argc; 71 char *argv[]; 72{ 73 struct union_args args; 74 int ch, mntflags; 75 char target[MAXPATHLEN];
| 1/* 2 * Copyright (c) 1992, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software donated to Berkeley by 6 * Jan-Simon Pendry. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#ifndef lint 38char copyright[] = 39"@(#) Copyright (c) 1992, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41#endif /* not lint */ 42 43#ifndef lint 44static char sccsid[] = "@(#)mount_union.c 8.5 (Berkeley) 3/27/94"; 45#endif /* not lint */ 46 47#include <sys/param.h> 48#include <sys/mount.h> 49 50#include <miscfs/union/union.h> 51 52#include <err.h> 53#include <stdio.h> 54#include <stdlib.h> 55#include <string.h> 56#include <unistd.h> 57 58#include "mntopts.h" 59 60struct mntopt mopts[] = { 61 MOPT_STDOPTS, 62 { NULL } 63}; 64 65int subdir __P((const char *, const char *)); 66void usage __P((void)); 67 68int 69main(argc, argv) 70 int argc; 71 char *argv[]; 72{ 73 struct union_args args; 74 int ch, mntflags; 75 char target[MAXPATHLEN];
|
| 76 struct vfsconf *vfc;
|
76 77 mntflags = 0; 78 args.mntflags = UNMNT_ABOVE; 79 while ((ch = getopt(argc, argv, "bo:r")) != EOF) 80 switch (ch) { 81 case 'b': 82 args.mntflags &= ~UNMNT_OPMASK; 83 args.mntflags |= UNMNT_BELOW; 84 break; 85 case 'o': 86 getmntopts(optarg, mopts, &mntflags); 87 break; 88 case 'r': 89 args.mntflags &= ~UNMNT_OPMASK; 90 args.mntflags |= UNMNT_REPLACE; 91 break; 92 case '?': 93 default: 94 usage(); 95 /* NOTREACHED */ 96 } 97 argc -= optind; 98 argv += optind; 99 100 if (argc != 2) 101 usage(); 102 103 if (realpath(argv[0], target) == 0) 104 err(1, "%s", target); 105 106 if (subdir(target, argv[1]) || subdir(argv[1], target)) 107 errx(1, "%s (%s) and %s are not distinct paths", 108 argv[0], target, argv[1]); 109 110 args.target = target; 111
| 77 78 mntflags = 0; 79 args.mntflags = UNMNT_ABOVE; 80 while ((ch = getopt(argc, argv, "bo:r")) != EOF) 81 switch (ch) { 82 case 'b': 83 args.mntflags &= ~UNMNT_OPMASK; 84 args.mntflags |= UNMNT_BELOW; 85 break; 86 case 'o': 87 getmntopts(optarg, mopts, &mntflags); 88 break; 89 case 'r': 90 args.mntflags &= ~UNMNT_OPMASK; 91 args.mntflags |= UNMNT_REPLACE; 92 break; 93 case '?': 94 default: 95 usage(); 96 /* NOTREACHED */ 97 } 98 argc -= optind; 99 argv += optind; 100 101 if (argc != 2) 102 usage(); 103 104 if (realpath(argv[0], target) == 0) 105 err(1, "%s", target); 106 107 if (subdir(target, argv[1]) || subdir(argv[1], target)) 108 errx(1, "%s (%s) and %s are not distinct paths", 109 argv[0], target, argv[1]); 110 111 args.target = target; 112
|
112 if (mount(MOUNT_UNION, argv[1], mntflags, &args))
| 113 vfc = getvfsbyname("union"); 114 if(!vfc && vfsisloadable("union")) { 115 if(vfsload("union")) 116 err(1, "vfsload(union)"); 117 endvfsent(); /* flush cache */ 118 vfc = getvfsbyname("union"); 119 } 120 121 if (mount(vfc ? vfc->vfc_index : MOUNT_UNION, argv[1], mntflags, &args))
|
113 err(1, NULL); 114 exit(0); 115} 116 117int 118subdir(p, dir) 119 const char *p; 120 const char *dir; 121{ 122 int l; 123 124 l = strlen(dir); 125 if (l <= 1) 126 return (1); 127 128 if ((strncmp(p, dir, l) == 0) && (p[l] == '/' || p[l] == '\0')) 129 return (1); 130 131 return (0); 132} 133 134void 135usage() 136{ 137 (void)fprintf(stderr, 138 "usage: mount_union [-br] [-o options] target_fs mount_point\n"); 139 exit(1); 140}
| 122 err(1, NULL); 123 exit(0); 124} 125 126int 127subdir(p, dir) 128 const char *p; 129 const char *dir; 130{ 131 int l; 132 133 l = strlen(dir); 134 if (l <= 1) 135 return (1); 136 137 if ((strncmp(p, dir, l) == 0) && (p[l] == '/' || p[l] == '\0')) 138 return (1); 139 140 return (0); 141} 142 143void 144usage() 145{ 146 (void)fprintf(stderr, 147 "usage: mount_union [-br] [-o options] target_fs mount_point\n"); 148 exit(1); 149}
|