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/*
* Copyright (c) 1997-2014 Erez Zadok
* Copyright (c) 1989 Jan-Simon Pendry
* Copyright (c) 1989 Imperial College of Science, Technology & Medicine
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Jan-Simon Pendry at Imperial College, London.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*
* File: am-utils/amd/amfs_program.c
*
*/
/*
* Program file system
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amd.h>
/* forward definitions */
static char *amfs_program_match(am_opts *fo);
static int amfs_program_mount(am_node *am, mntfs *mf);
static int amfs_program_umount(am_node *am, mntfs *mf);
static int amfs_program_init(mntfs *mf);
/*
* Ops structure
*/
am_ops amfs_program_ops =
{
"program",
amfs_program_match,
amfs_program_init,
amfs_program_mount,
amfs_program_umount,
amfs_error_lookup_child,
amfs_error_mount_child,
amfs_error_readdir,
0, /* amfs_program_readlink */
0, /* amfs_program_mounted */
0, /* amfs_program_umounted */
amfs_generic_find_srvr,
0, /* amfs_program_get_wchan */
FS_MKMNT | FS_BACKGROUND | FS_AMQINFO, /* nfs_fs_flags */
#ifdef HAVE_FS_AUTOFS
AUTOFS_PROGRAM_FS_FLAGS,
#endif /* HAVE_FS_AUTOFS */
};
/*
* Execute needs a mount and unmount command.
*/
static char *
amfs_program_match(am_opts *fo)
{
char *prog;
if (fo->opt_unmount && fo->opt_umount) {
plog(XLOG_ERROR, "program: cannot specify both unmount and umount options");
return 0;
}
if (!fo->opt_mount) {
plog(XLOG_ERROR, "program: must specify mount command");
return 0;
}
if (!fo->opt_unmount && !fo->opt_umount) {
fo->opt_unmount = str3cat(NULL, UNMOUNT_PROGRAM, " umount ", fo->opt_fs);
plog(XLOG_INFO, "program: un/umount not specified; using default \"%s\"",
fo->opt_unmount);
}
prog = strchr(fo->opt_mount, ' ');
return xstrdup(prog ? prog + 1 : fo->opt_mount);
}
static int
amfs_program_init(mntfs *mf)
{
/* check if already saved value */
if (mf->mf_private != NULL)
return 0;
if (mf->mf_fo == NULL)
return 0;
/* save unmount (or umount) command */
if (mf->mf_fo->opt_unmount != NULL)
mf->mf_private = (opaque_t) xstrdup(mf->mf_fo->opt_unmount);
else
mf->mf_private = (opaque_t) xstrdup(mf->mf_fo->opt_umount);
mf->mf_prfree = (void (*)(opaque_t)) free;
return 0;
}
static int
amfs_program_exec(char *info)
{
char **xivec;
int error;
/*
* Split copy of command info string
*/
info = xstrdup(info);
xivec = strsplit(info, ' ', '\'');
/*
* Put stdout to stderr
*/
(void) fclose(stdout);
if (!logfp)
logfp = stderr; /* initialize before possible first use */
if (dup(fileno(logfp)) == -1)
goto out;
if (fileno(logfp) != fileno(stderr)) {
(void) fclose(stderr);
if (dup(fileno(logfp)) == -1)
goto out;
}
/*
* Try the exec
*/
if (amuDebug(D_FULL)) {
char **cp = xivec;
plog(XLOG_DEBUG, "executing (un)mount command...");
while (*cp) {
plog(XLOG_DEBUG, "arg[%ld] = '%s'", (long) (cp - xivec), *cp);
cp++;
}
}
if (xivec[0] == 0 || xivec[1] == 0) {
errno = EINVAL;
plog(XLOG_USER, "1st/2nd args missing to (un)mount program");
} else {
(void) execv(xivec[0], xivec + 1);
error = errno;
plog(XLOG_ERROR, "exec failed: %m");
errno = error;
}
out:
/*
* Save error number
*/
error = errno;
/*
* Free allocate memory
*/
XFREE(info);
XFREE(xivec);
/*
* Return error
*/
return error;
}
static int
amfs_program_mount(am_node *am, mntfs *mf)
{
return amfs_program_exec(mf->mf_fo->opt_mount);
}
static int
amfs_program_umount(am_node *am, mntfs *mf)
{
return amfs_program_exec((char *) mf->mf_private);
}
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