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/* ----------------------------------------------------------------------- *
*
* module.c - common module-management functions
*
* Copyright 1997 Transmeta Corporation - All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
* USA; either version 2 of the License, or (at your option) any later
* version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
#include <stdio.h>
#include <dlfcn.h>
#include <string.h>
#include <stdlib.h>
#include "automount.h"
#include "nsswitch.h"
#if 0
/* see comment in daemon/automount.c around load_autofs4_module() call */
int load_autofs4_module(void)
{
FILE *fp;
char buf[PATH_MAX];
int ret;
/*
* Check if module already loaded or compiled in.
* If both autofs v3 and v4 are coplied in and
* the v3 module registers first or the v4 module
* is an older version we will catch it at mount
* time.
*/
fp = open_fopen_r("/proc/filesystems");
if (!fp) {
logerr("cannot open /proc/filesystems\n");
return 0;
}
while (fgets(buf, PATH_MAX - 1, fp)) {
if (strstr(buf, "autofs")) {
fclose(fp);
return 1;
}
}
fclose(fp);
ret = spawnl(LOGOPT_NONE, PATH_MODPROBE, PATH_MODPROBE,
"-q", FS_MODULE_NAME, NULL);
if (ret)
return 0;
return 1;
}
#endif
int open_lookup(const char *name, const char *err_prefix, const char *mapfmt,
int argc, const char *const *argv, struct lookup_mod **lookup)
{
struct lookup_mod *mod;
char buf[MAX_ERR_BUF];
char fnbuf[PATH_MAX];
size_t size;
char *type;
void *dh;
int *ver;
*lookup = NULL;
mod = malloc(sizeof(struct lookup_mod));
if (!mod) {
if (err_prefix) {
char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
logerr("%s%s", err_prefix, estr);
}
return NSS_STATUS_UNAVAIL;
}
type = strdup(name);
if (!type) {
free(mod);
if (err_prefix) {
char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
logerr("%s%s", err_prefix, estr);
}
return NSS_STATUS_UNAVAIL;
}
size = snprintf(fnbuf, sizeof(fnbuf),
"%s/lookup_%s.so", AUTOFS_LIB_DIR, name);
if (size >= sizeof(fnbuf)) {
free(mod);
free(type);
if (err_prefix) {
char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
logerr("%s%s", err_prefix, estr);
}
return NSS_STATUS_UNAVAIL;
}
if (!(dh = dlopen(fnbuf, RTLD_NOW))) {
if (err_prefix)
logerr("%scannot open lookup module %s (%s)",
err_prefix, name, dlerror());
free(mod);
free(type);
return NSS_STATUS_UNAVAIL;
}
if (!(ver = (int *) dlsym(dh, "lookup_version"))
|| *ver != AUTOFS_LOOKUP_VERSION) {
if (err_prefix)
logerr("%slookup module %s version mismatch",
err_prefix, name);
dlclose(dh);
free(mod);
free(type);
return NSS_STATUS_UNAVAIL;
}
if (!(mod->lookup_init = (lookup_init_t) dlsym(dh, "lookup_init")) ||
!(mod->lookup_reinit = (lookup_reinit_t) dlsym(dh, "lookup_reinit")) ||
!(mod->lookup_read_master = (lookup_read_master_t) dlsym(dh, "lookup_read_master")) ||
!(mod->lookup_read_map = (lookup_read_map_t) dlsym(dh, "lookup_read_map")) ||
!(mod->lookup_mount = (lookup_mount_t) dlsym(dh, "lookup_mount")) ||
!(mod->lookup_done = (lookup_done_t) dlsym(dh, "lookup_done"))) {
if (err_prefix)
logerr("%slookup module %s corrupt", err_prefix, name);
dlclose(dh);
free(mod);
free(type);
return NSS_STATUS_UNAVAIL;
}
if (mod->lookup_init(mapfmt, argc, argv, &mod->context)) {
dlclose(dh);
free(mod);
free(type);
return NSS_STATUS_NOTFOUND;
}
mod->type = type;
mod->dlhandle = dh;
*lookup = mod;
return NSS_STATUS_SUCCESS;
}
int reinit_lookup(struct lookup_mod *mod, const char *name,
const char *err_prefix, const char *mapfmt,
int argc, const char *const *argv)
{
if (mod->lookup_reinit(mapfmt, argc, argv, &mod->context)) {
if (err_prefix)
logerr("%scould not reinit lookup module %s",
err_prefix, name);
return 1;
}
return 0;
}
int close_lookup(struct lookup_mod *mod)
{
int rv = mod->lookup_done(mod->context);
dlclose(mod->dlhandle);
free(mod->type);
free(mod);
return rv;
}
struct parse_mod *open_parse(const char *name, const char *err_prefix,
int argc, const char *const *argv)
{
struct parse_mod *mod;
char buf[MAX_ERR_BUF];
char fnbuf[PATH_MAX];
size_t size;
void *dh;
int *ver;
mod = malloc(sizeof(struct parse_mod));
if (!mod) {
if (err_prefix) {
char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
logerr("%s%s", err_prefix, estr);
}
return NULL;
}
size = snprintf(fnbuf, sizeof(fnbuf),
"%s/parse_%s.so", AUTOFS_LIB_DIR, name);
if (size >= sizeof(fnbuf)) {
free(mod);
if (err_prefix) {
char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
logerr("%s%s", err_prefix, estr);
}
return NULL;
}
if (!(dh = dlopen(fnbuf, RTLD_NOW))) {
if (err_prefix)
logerr("%scannot open parse module %s (%s)",
err_prefix, name, dlerror());
free(mod);
return NULL;
}
if (!(ver = (int *) dlsym(dh, "parse_version"))
|| *ver != AUTOFS_PARSE_VERSION) {
if (err_prefix)
logerr("%sparse module %s version mismatch",
err_prefix, name);
dlclose(dh);
free(mod);
return NULL;
}
if (!(mod->parse_init = (parse_init_t) dlsym(dh, "parse_init")) ||
!(mod->parse_reinit = (parse_reinit_t) dlsym(dh, "parse_reinit")) ||
!(mod->parse_mount = (parse_mount_t) dlsym(dh, "parse_mount")) ||
!(mod->parse_done = (parse_done_t) dlsym(dh, "parse_done"))) {
if (err_prefix)
logerr("%sparse module %s corrupt",
err_prefix, name);
dlclose(dh);
free(mod);
return NULL;
}
if (mod->parse_init(argc, argv, &mod->context)) {
dlclose(dh);
free(mod);
return NULL;
}
mod->dlhandle = dh;
return mod;
}
int reinit_parse(struct parse_mod *mod, const char *name,
const char *err_prefix, int argc, const char *const *argv)
{
if (mod->parse_reinit(argc, argv, &mod->context)) {
if (err_prefix)
logerr("%scould not reinit parse module %s",
err_prefix, name);
return 1;
}
return 0;
}
int close_parse(struct parse_mod *mod)
{
int rv = mod->parse_done(mod->context);
dlclose(mod->dlhandle);
free(mod);
return rv;
}
struct mount_mod *open_mount(const char *name, const char *err_prefix)
{
struct mount_mod *mod;
char buf[MAX_ERR_BUF];
char fnbuf[PATH_MAX];
size_t size;
void *dh;
int *ver;
mod = malloc(sizeof(struct mount_mod));
if (!mod) {
if (err_prefix) {
char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
logerr("%s%s", err_prefix, estr);
}
return NULL;
}
size = snprintf(fnbuf, sizeof(fnbuf),
"%s/mount_%s.so", AUTOFS_LIB_DIR, name);
if (size >= sizeof(fnbuf)) {
free(mod);
if (err_prefix) {
char *estr = strerror_r(errno, buf, MAX_ERR_BUF);
logerr("%s%s", err_prefix, estr);
}
return NULL;
}
if (!(dh = dlopen(fnbuf, RTLD_NOW))) {
if (err_prefix)
logerr("%scannot open mount module %s (%s)",
err_prefix, name, dlerror());
free(mod);
return NULL;
}
if (!(ver = (int *) dlsym(dh, "mount_version"))
|| *ver != AUTOFS_MOUNT_VERSION) {
if (err_prefix)
logerr("%smount module %s version mismatch",
err_prefix, name);
dlclose(dh);
free(mod);
return NULL;
}
if (!(mod->mount_init = (mount_init_t) dlsym(dh, "mount_init")) ||
!(mod->mount_reinit = (mount_reinit_t) dlsym(dh, "mount_reinit")) ||
!(mod->mount_mount = (mount_mount_t) dlsym(dh, "mount_mount")) ||
!(mod->mount_done = (mount_done_t) dlsym(dh, "mount_done"))) {
if (err_prefix)
logerr("%smount module %s corrupt",
err_prefix, name);
dlclose(dh);
free(mod);
return NULL;
}
if (mod->mount_init(&mod->context)) {
dlclose(dh);
free(mod);
return NULL;
}
mod->dlhandle = dh;
return mod;
}
int reinit_mount(struct mount_mod *mod, const char *name, const char *err_prefix)
{
if (mod->mount_reinit(&mod->context)) {
if (err_prefix)
logerr("%scould not reinit mount module %s",
err_prefix, name);
return 1;
}
return 0;
}
int close_mount(struct mount_mod *mod)
{
int rv = mod->mount_done(mod->context);
dlclose(mod->dlhandle);
free(mod);
return rv;
}
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