1/* 2 * Copyright (c) 1997-2006 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgment: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * 40 * File: am-utils/amd/amfs_program.c 41 * 42 */ 43 44/* 45 * Program file system 46 */ 47 48#ifdef HAVE_CONFIG_H 49# include <config.h> 50#endif /* HAVE_CONFIG_H */ 51#include <am_defs.h> 52#include <amd.h> 53 54/* forward definitions */ 55static char *amfs_program_match(am_opts *fo); 56static int amfs_program_mount(am_node *am, mntfs *mf); 57static int amfs_program_umount(am_node *am, mntfs *mf); 58static int amfs_program_init(mntfs *mf); 59 60/* 61 * Ops structure 62 */ 63am_ops amfs_program_ops = 64{ 65 "program", 66 amfs_program_match, 67 amfs_program_init, 68 amfs_program_mount, 69 amfs_program_umount, 70 amfs_error_lookup_child, 71 amfs_error_mount_child, 72 amfs_error_readdir, 73 0, /* amfs_program_readlink */ 74 0, /* amfs_program_mounted */ 75 0, /* amfs_program_umounted */ 76 amfs_generic_find_srvr, 77 0, /* amfs_program_get_wchan */ 78 FS_MKMNT | FS_BACKGROUND | FS_AMQINFO, /* nfs_fs_flags */ 79#ifdef HAVE_FS_AUTOFS 80 AUTOFS_PROGRAM_FS_FLAGS, 81#endif /* HAVE_FS_AUTOFS */ 82}; 83 84 85/* 86 * Execute needs a mount and unmount command. 87 */ 88static char * 89amfs_program_match(am_opts *fo) 90{ 91 char *prog; 92 93 if (fo->opt_unmount && fo->opt_umount) { 94 plog(XLOG_ERROR, "program: cannot specify both unmount and umount options"); 95 return 0; 96 } 97 if (!fo->opt_mount) { 98 plog(XLOG_ERROR, "program: must specify mount command"); 99 return 0; 100 } 101 if (!fo->opt_unmount && !fo->opt_umount) { 102 fo->opt_unmount = str3cat(NULL, UNMOUNT_PROGRAM, " umount ", fo->opt_fs); 103 plog(XLOG_INFO, "program: un/umount not specified; using default \"%s\"", 104 fo->opt_unmount); 105 } 106 prog = strchr(fo->opt_mount, ' '); 107 108 return strdup(prog ? prog + 1 : fo->opt_mount); 109} 110 111 112static int 113amfs_program_init(mntfs *mf) 114{ 115 /* check if already saved value */ 116 if (mf->mf_private != NULL) 117 return 0; 118 119 /* save unmount (or umount) command */ 120 if (mf->mf_fo->opt_unmount != NULL) 121 mf->mf_private = (opaque_t) strdup(mf->mf_fo->opt_unmount); 122 else 123 mf->mf_private = (opaque_t) strdup(mf->mf_fo->opt_umount); 124 mf->mf_prfree = (void (*)(opaque_t)) free; 125 126 return 0; 127} 128 129 130static int 131amfs_program_exec(char *info) 132{ 133 char **xivec; 134 int error; 135 136 /* 137 * Split copy of command info string 138 */ 139 info = strdup(info); 140 if (info == 0) 141 return ENOBUFS; 142 xivec = strsplit(info, ' ', '\''); 143 144 /* 145 * Put stdout to stderr 146 */ 147 (void) fclose(stdout); 148 if (!logfp) 149 logfp = stderr; /* initialize before possible first use */ 150 (void) dup(fileno(logfp)); 151 if (fileno(logfp) != fileno(stderr)) { 152 (void) fclose(stderr); 153 (void) dup(fileno(logfp)); 154 } 155 156 /* 157 * Try the exec 158 */ 159 if (amuDebug(D_FULL)) { 160 char **cp = xivec; 161 plog(XLOG_DEBUG, "executing (un)mount command..."); 162 while (*cp) { 163 plog(XLOG_DEBUG, "arg[%ld] = '%s'", (long) (cp - xivec), *cp); 164 cp++; 165 } 166 } 167 168 if (xivec[0] == 0 || xivec[1] == 0) { 169 errno = EINVAL; 170 plog(XLOG_USER, "1st/2nd args missing to (un)mount program"); 171 } else { 172 (void) execv(xivec[0], xivec + 1); 173 } 174 175 /* 176 * Save error number 177 */ 178 error = errno; 179 plog(XLOG_ERROR, "exec failed: %m"); 180 181 /* 182 * Free allocate memory 183 */ 184 XFREE(info); 185 XFREE(xivec); 186 187 /* 188 * Return error 189 */ 190 return error; 191} 192 193 194static int 195amfs_program_mount(am_node *am, mntfs *mf) 196{ 197 return amfs_program_exec(mf->mf_fo->opt_mount); 198} 199 200 201static int 202amfs_program_umount(am_node *am, mntfs *mf) 203{ 204 return amfs_program_exec((char *) mf->mf_private); 205} 206