1 /* $NetBSD: amfs_program.c,v 1.2 2018/02/04 09:15:44 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1997-2014 Erez Zadok 5 * Copyright (c) 1989 Jan-Simon Pendry 6 * Copyright (c) 1989 Imperial College of Science, Technology & Medicine 7 * Copyright (c) 1989 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 * 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/amd/amfs_program.c 39 * 40 */ 41 42 /* 43 * Program file system 44 */ 45 46 #ifdef HAVE_CONFIG_H 47 # include <config.h> 48 #endif /* HAVE_CONFIG_H */ 49 #include <am_defs.h> 50 #include <amd.h> 51 52 /* forward definitions */ 53 static char *amfs_program_match(am_opts *fo); 54 static int amfs_program_mount(am_node *am, mntfs *mf); 55 static int amfs_program_umount(am_node *am, mntfs *mf); 56 static int amfs_program_init(mntfs *mf); 57 58 /* 59 * Ops structure 60 */ 61 am_ops amfs_program_ops = 62 { 63 "program", 64 amfs_program_match, 65 amfs_program_init, 66 amfs_program_mount, 67 amfs_program_umount, 68 amfs_error_lookup_child, 69 amfs_error_mount_child, 70 amfs_error_readdir, 71 0, /* amfs_program_readlink */ 72 0, /* amfs_program_mounted */ 73 0, /* amfs_program_umounted */ 74 amfs_generic_find_srvr, 75 0, /* amfs_program_get_wchan */ 76 FS_MKMNT | FS_BACKGROUND | FS_AMQINFO, /* nfs_fs_flags */ 77 #ifdef HAVE_FS_AUTOFS 78 AUTOFS_PROGRAM_FS_FLAGS, 79 #endif /* HAVE_FS_AUTOFS */ 80 }; 81 82 83 /* 84 * Execute needs a mount and unmount command. 85 */ 86 static char * 87 amfs_program_match(am_opts *fo) 88 { 89 char *prog; 90 91 if (fo->opt_unmount && fo->opt_umount) { 92 plog(XLOG_ERROR, "program: cannot specify both unmount and umount options"); 93 return 0; 94 } 95 if (!fo->opt_mount) { 96 plog(XLOG_ERROR, "program: must specify mount command"); 97 return 0; 98 } 99 if (!fo->opt_unmount && !fo->opt_umount) { 100 fo->opt_unmount = str3cat(NULL, UNMOUNT_PROGRAM, " umount ", fo->opt_fs); 101 plog(XLOG_INFO, "program: un/umount not specified; using default \"%s\"", 102 fo->opt_unmount); 103 } 104 prog = strchr(fo->opt_mount, ' '); 105 106 return xstrdup(prog ? prog + 1 : fo->opt_mount); 107 } 108 109 110 static int 111 amfs_program_init(mntfs *mf) 112 { 113 /* check if already saved value */ 114 if (mf->mf_private != NULL) 115 return 0; 116 117 if (mf->mf_fo == NULL) 118 return 0; 119 120 /* save unmount (or umount) command */ 121 if (mf->mf_fo->opt_unmount != NULL) 122 mf->mf_private = (opaque_t) xstrdup(mf->mf_fo->opt_unmount); 123 else 124 mf->mf_private = (opaque_t) xstrdup(mf->mf_fo->opt_umount); 125 mf->mf_prfree = (void (*)(opaque_t)) free; 126 127 return 0; 128 } 129 130 131 static int 132 amfs_program_exec(char *info) 133 { 134 char **xivec; 135 int error; 136 137 /* 138 * Split copy of command info string 139 */ 140 info = xstrdup(info); 141 xivec = strsplit(info, ' ', '\''); 142 143 /* 144 * Put stdout to stderr 145 */ 146 (void) fclose(stdout); 147 if (!logfp) { 148 logfp = stderr; /* initialize before possible first use */ 149 if (dup(fileno(logfp)) == -1) 150 goto out; 151 } 152 if (fileno(logfp) != fileno(stderr)) { 153 (void) fclose(stderr); 154 if (dup(fileno(logfp)) == -1) 155 goto out; 156 } 157 158 /* 159 * Try the exec 160 */ 161 if (amuDebug(D_FULL)) { 162 char **cp = xivec; 163 plog(XLOG_DEBUG, "executing (un)mount command..."); 164 while (*cp) { 165 plog(XLOG_DEBUG, "arg[%ld] = '%s'", (long) (cp - xivec), *cp); 166 cp++; 167 } 168 } 169 170 if (xivec[0] == 0 || xivec[1] == 0) { 171 errno = EINVAL; 172 plog(XLOG_USER, "1st/2nd args missing to (un)mount program"); 173 } else { 174 (void) execv(xivec[0], xivec + 1); 175 error = errno; 176 plog(XLOG_ERROR, "exec failed: %m"); 177 errno = error; 178 } 179 180 out: 181 /* 182 * Save error number 183 */ 184 error = errno; 185 186 /* 187 * Free allocate memory 188 */ 189 XFREE(info); 190 XFREE(xivec); 191 192 /* 193 * Return error 194 */ 195 return error; 196 } 197 198 199 static int 200 amfs_program_mount(am_node *am, mntfs *mf) 201 { 202 return amfs_program_exec(mf->mf_fo->opt_mount); 203 } 204 205 206 static int 207 amfs_program_umount(am_node *am, mntfs *mf) 208 { 209 return amfs_program_exec((char *) mf->mf_private); 210 } 211
Indexes created Tue May 26 00:24:38 UTC 2026