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/*
SSSD
nscd.c
Copyright (C) Jakub Hrozek <jhrozek@redhat.com> 2010
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; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <talloc.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "config.h"
#include "util/util.h"
#include "tools/tools_util.h"
#ifndef NSCD_RELOAD_ARG
#define NSCD_RELOAD_ARG "-i"
#endif
#if defined(NSCD_PATH) && defined(HAVE_NSCD)
int flush_nscd_cache(enum nscd_db flush_db)
{
const char *service;
pid_t nscd_pid;
int ret, status;
switch(flush_db) {
case NSCD_DB_PASSWD:
service = "passwd";
break;
case NSCD_DB_GROUP:
service = "group";
break;
default:
DEBUG(SSSDBG_CRIT_FAILURE, "Unknown nscd database\n");
ret = EINVAL;
goto done;
}
nscd_pid = fork();
switch (nscd_pid) {
case 0:
execl(NSCD_PATH, "nscd", NSCD_RELOAD_ARG, service, NULL);
/* if this returns it is an error */
DEBUG(SSSDBG_CRIT_FAILURE,
"execl(3) failed: %d(%s)\n", errno, strerror(errno));
exit(errno);
case -1:
DEBUG(SSSDBG_CRIT_FAILURE, "fork failed\n");
ret = EFAULT;
break;
default:
do {
errno = 0;
ret = waitpid(nscd_pid, &status, 0);
} while (ret == -1 && errno == EINTR);
if (ret > 0) {
if (WIFEXITED(status)) {
ret = WEXITSTATUS(status);
if (ret > 0) {
/* The flush fails if nscd is not running, so do not care
* about the return code */
DEBUG(SSSDBG_TRACE_INTERNAL,
"Error flushing cache, is nscd running?\n");
}
}
} else {
DEBUG(SSSDBG_FUNC_DATA,
"Failed to wait for children %d\n", nscd_pid);
ret = EIO;
}
}
done:
return ret;
}
#else /* defined(NSCD_PATH) && defined(HAVE_NSCD) */
int flush_nscd_cache(enum nscd_db flush_db)
{
return EOK;
}
#endif
/* NSCD config file parse and check */
static unsigned int sss_nscd_check_service(char* svc_name)
{
struct sss_nscd_db {
const char *svc_type_name;
unsigned int nscd_service_flag;
};
int i;
unsigned int ret = 0;
struct sss_nscd_db db[] = {
{ "passwd", 0x0001 },
{ "group", 0x0010 },
{ "netgroup", 0x0100 },
{ "services", 0x1000 },
{ NULL, 0 }
};
if (svc_name == NULL) {
return ret;
}
for (i = 0; db[i].svc_type_name != NULL; i++) {
if (!strcmp(db[i].svc_type_name, svc_name)) {
ret = db[i].nscd_service_flag;
break;
}
}
return ret;
}
errno_t sss_nscd_parse_conf(const char *conf_path)
{
FILE *fp;
int ret = EOK;
unsigned int occured = 0;
char *line, *entry, *service, *enabled, *pad;
size_t linelen = 0;
fp = fopen(conf_path, "r");
if (fp == NULL) {
DEBUG(SSSDBG_MINOR_FAILURE, "Couldn't open NSCD configuration "
"file [%s]\n", NSCD_CONF_PATH);
return ENOENT;
}
while (getline(&line, &linelen, fp) != -1) {
pad = strchr(line, '#');
if (pad != NULL) {
*pad = '\0';
}
if (line[0] == '\n' || line[0] == '\0') continue;
entry = line;
while (isspace(*entry) && *entry != '\0') {
entry++;
}
pad = entry;
while (!isspace(*pad) && *pad != '\0') {
pad++;
}
service = pad;
while (isspace(*service) && *service != '\0') {
service++;
}
*pad = '\0';
pad = service;
while (!isspace(*pad) && *pad != '\0') {
pad++;
}
enabled = pad;
while (isspace(*enabled) && *enabled != '\0') {
enabled++;
}
*pad = '\0';
pad = enabled;
while (!isspace(*pad) && *pad != '\0') {
pad++;
}
*pad = '\0';
if (!strcmp(entry, "enable-cache") &&
!strcmp(enabled, "yes")) {
occured |= sss_nscd_check_service(service);
}
};
ret = ferror(fp);
if (ret) {
DEBUG(SSSDBG_MINOR_FAILURE, "Reading NSCD configuration file [%s] "
"ended with failure [%d]: %s.\n",
NSCD_CONF_PATH, ret, strerror(ret));
ret = ENOENT;
goto done;
}
ret = EOK;
if (occured != 0) {
ret = EEXIST;
goto done;
}
done:
free(line);
fclose(fp);
return ret;
}
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