1 /* 2 * Copyright (c) 1997-2014 Erez Zadok 3 * Copyright (c) 1989 Jan-Simon Pendry 4 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine 5 * Copyright (c) 1989 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Jan-Simon Pendry at Imperial College, London. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * 36 * File: am-utils/amd/amfs_program.c 37 * 38 */ 39 40 /* 41 * Program file system 42 */ 43 44 #ifdef HAVE_CONFIG_H 45 # include <config.h> 46 #endif /* HAVE_CONFIG_H */ 47 #include <am_defs.h> 48 #include <amd.h> 49 50 /* forward definitions */ 51 static char *amfs_program_match(am_opts *fo); 52 static int amfs_program_mount(am_node *am, mntfs *mf); 53 static int amfs_program_umount(am_node *am, mntfs *mf); 54 static int amfs_program_init(mntfs *mf); 55 56 /* 57 * Ops structure 58 */ 59 am_ops amfs_program_ops = 60 { 61 "program", 62 amfs_program_match, 63 amfs_program_init, 64 amfs_program_mount, 65 amfs_program_umount, 66 amfs_error_lookup_child, 67 amfs_error_mount_child, 68 amfs_error_readdir, 69 0, /* amfs_program_readlink */ 70 0, /* amfs_program_mounted */ 71 0, /* amfs_program_umounted */ 72 amfs_generic_find_srvr, 73 0, /* amfs_program_get_wchan */ 74 FS_MKMNT | FS_BACKGROUND | FS_AMQINFO, /* nfs_fs_flags */ 75 #ifdef HAVE_FS_AUTOFS 76 AUTOFS_PROGRAM_FS_FLAGS, 77 #endif /* HAVE_FS_AUTOFS */ 78 }; 79 80 81 /* 82 * Execute needs a mount and unmount command. 83 */ 84 static char * 85 amfs_program_match(am_opts *fo) 86 { 87 char *prog; 88 89 if (fo->opt_unmount && fo->opt_umount) { 90 plog(XLOG_ERROR, "program: cannot specify both unmount and umount options"); 91 return 0; 92 } 93 if (!fo->opt_mount) { 94 plog(XLOG_ERROR, "program: must specify mount command"); 95 return 0; 96 } 97 if (!fo->opt_unmount && !fo->opt_umount) { 98 fo->opt_unmount = str3cat(NULL, UNMOUNT_PROGRAM, " umount ", fo->opt_fs); 99 plog(XLOG_INFO, "program: un/umount not specified; using default \"%s\"", 100 fo->opt_unmount); 101 } 102 prog = strchr(fo->opt_mount, ' '); 103 104 return xstrdup(prog ? prog + 1 : fo->opt_mount); 105 } 106 107 108 static int 109 amfs_program_init(mntfs *mf) 110 { 111 /* check if already saved value */ 112 if (mf->mf_private != NULL) 113 return 0; 114 115 if (mf->mf_fo == NULL) 116 return 0; 117 118 /* save unmount (or umount) command */ 119 if (mf->mf_fo->opt_unmount != NULL) 120 mf->mf_private = (opaque_t) xstrdup(mf->mf_fo->opt_unmount); 121 else 122 mf->mf_private = (opaque_t) xstrdup(mf->mf_fo->opt_umount); 123 mf->mf_prfree = (void (*)(opaque_t)) free; 124 125 return 0; 126 } 127 128 129 static int 130 amfs_program_exec(char *info) 131 { 132 char **xivec; 133 int error; 134 135 /* 136 * Split copy of command info string 137 */ 138 info = xstrdup(info); 139 xivec = strsplit(info, ' ', '\''); 140 141 /* 142 * Put stdout to stderr 143 */ 144 (void) fclose(stdout); 145 if (!logfp) 146 logfp = stderr; /* initialize before possible first use */ 147 if (dup(fileno(logfp)) == -1) 148 goto out; 149 if (fileno(logfp) != fileno(stderr)) { 150 (void) fclose(stderr); 151 if (dup(fileno(logfp)) == -1) 152 goto out; 153 } 154 155 /* 156 * Try the exec 157 */ 158 if (amuDebug(D_FULL)) { 159 char **cp = xivec; 160 plog(XLOG_DEBUG, "executing (un)mount command..."); 161 while (*cp) { 162 plog(XLOG_DEBUG, "arg[%ld] = '%s'", (long) (cp - xivec), *cp); 163 cp++; 164 } 165 } 166 167 if (xivec[0] == 0 || xivec[1] == 0) { 168 errno = EINVAL; 169 plog(XLOG_USER, "1st/2nd args missing to (un)mount program"); 170 } else { 171 (void) execv(xivec[0], xivec + 1); 172 error = errno; 173 plog(XLOG_ERROR, "exec failed: %m"); 174 errno = error; 175 } 176 177 out: 178 /* 179 * Save error number 180 */ 181 error = errno; 182 183 /* 184 * Free allocate memory 185 */ 186 XFREE(info); 187 XFREE(xivec); 188 189 /* 190 * Return error 191 */ 192 return error; 193 } 194 195 196 static int 197 amfs_program_mount(am_node *am, mntfs *mf) 198 { 199 return amfs_program_exec(mf->mf_fo->opt_mount); 200 } 201 202 203 static int 204 amfs_program_umount(am_node *am, mntfs *mf) 205 { 206 return amfs_program_exec((char *) mf->mf_private); 207 } 208