glibc/nscd/nscd_conf.c

316 lines
7.5 KiB
C

/* Copyright (c) 1998-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
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; version 2 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 <ctype.h>
#include <errno.h>
#include <error.h>
#include <libintl.h>
#include <malloc.h>
#include <pwd.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/param.h>
#include <sys/types.h>
#include "dbg_log.h"
#include "nscd.h"
/* Names of the databases. */
const char *const dbnames[lastdb] =
{
[pwddb] = "passwd",
[grpdb] = "group",
[hstdb] = "hosts",
[servdb] = "services",
[netgrdb] = "netgroup"
};
static int
find_db (const char *name)
{
for (int cnt = 0; cnt < lastdb; ++cnt)
if (strcmp (name, dbnames[cnt]) == 0)
return cnt;
error (0, 0, _("database %s is not supported"), name);
return -1;
}
int
nscd_parse_file (const char *fname, struct database_dyn dbs[lastdb])
{
FILE *fp;
char *line, *cp, *entry, *arg1, *arg2;
size_t len;
int cnt;
const unsigned int initial_error_message_count = error_message_count;
/* Open the configuration file. */
fp = fopen (fname, "r");
if (fp == NULL)
return -1;
/* The stream is not used by more than one thread. */
(void) __fsetlocking (fp, FSETLOCKING_BYCALLER);
line = NULL;
len = 0;
do
{
ssize_t n = getline (&line, &len, fp);
if (n < 0)
break;
if (line[n - 1] == '\n')
line[n - 1] = '\0';
/* Because the file format does not know any form of quoting we
can search forward for the next '#' character and if found
make it terminating the line. */
*strchrnul (line, '#') = '\0';
/* If the line is blank it is ignored. */
if (line[0] == '\0')
continue;
entry = line;
while (isspace (*entry) && *entry != '\0')
++entry;
cp = entry;
while (!isspace (*cp) && *cp != '\0')
++cp;
arg1 = cp;
++arg1;
*cp = '\0';
if (strlen (entry) == 0)
error (0, 0, _("Parse error: %s"), line);
while (isspace (*arg1) && *arg1 != '\0')
++arg1;
cp = arg1;
while (!isspace (*cp) && *cp != '\0')
++cp;
arg2 = cp;
++arg2;
*cp = '\0';
if (strlen (arg2) > 0)
{
while (isspace (*arg2) && *arg2 != '\0')
++arg2;
cp = arg2;
while (!isspace (*cp) && *cp != '\0')
++cp;
*cp = '\0';
}
if (strcmp (entry, "positive-time-to-live") == 0)
{
int idx = find_db (arg1);
if (idx >= 0)
dbs[idx].postimeout = atol (arg2);
}
else if (strcmp (entry, "negative-time-to-live") == 0)
{
int idx = find_db (arg1);
if (idx >= 0)
dbs[idx].negtimeout = atol (arg2);
}
else if (strcmp (entry, "suggested-size") == 0)
{
int idx = find_db (arg1);
if (idx >= 0)
dbs[idx].suggested_module
= atol (arg2) ?: DEFAULT_SUGGESTED_MODULE;
}
else if (strcmp (entry, "enable-cache") == 0)
{
int idx = find_db (arg1);
if (idx >= 0)
{
if (strcmp (arg2, "no") == 0)
dbs[idx].enabled = 0;
else if (strcmp (arg2, "yes") == 0)
dbs[idx].enabled = 1;
}
}
else if (strcmp (entry, "check-files") == 0)
{
int idx = find_db (arg1);
if (idx >= 0)
{
if (strcmp (arg2, "no") == 0)
dbs[idx].check_file = 0;
else if (strcmp (arg2, "yes") == 0)
dbs[idx].check_file = 1;
}
}
else if (strcmp (entry, "max-db-size") == 0)
{
int idx = find_db (arg1);
if (idx >= 0)
dbs[idx].max_db_size = atol (arg2) ?: DEFAULT_MAX_DB_SIZE;
}
else if (strcmp (entry, "logfile") == 0)
set_logfile (arg1);
else if (strcmp (entry, "debug-level") == 0)
{
int level = atoi (arg1);
if (level > 0)
debug_level = level;
}
else if (strcmp (entry, "threads") == 0)
{
if (nthreads == -1)
nthreads = MAX (atol (arg1), lastdb);
}
else if (strcmp (entry, "max-threads") == 0)
{
max_nthreads = MAX (atol (arg1), lastdb);
}
else if (strcmp (entry, "server-user") == 0)
{
if (!arg1)
error (0, 0, _("Must specify user name for server-user option"));
else
server_user = xstrdup (arg1);
}
else if (strcmp (entry, "stat-user") == 0)
{
if (arg1 == NULL)
error (0, 0, _("Must specify user name for stat-user option"));
else
{
stat_user = xstrdup (arg1);
struct passwd *pw = getpwnam (stat_user);
if (pw != NULL)
stat_uid = pw->pw_uid;
}
}
else if (strcmp (entry, "persistent") == 0)
{
int idx = find_db (arg1);
if (idx >= 0)
{
if (strcmp (arg2, "no") == 0)
dbs[idx].persistent = 0;
else if (strcmp (arg2, "yes") == 0)
dbs[idx].persistent = 1;
}
}
else if (strcmp (entry, "shared") == 0)
{
int idx = find_db (arg1);
if (idx >= 0)
{
if (strcmp (arg2, "no") == 0)
dbs[idx].shared = 0;
else if (strcmp (arg2, "yes") == 0)
dbs[idx].shared = 1;
}
}
else if (strcmp (entry, "reload-count") == 0)
{
if (strcasecmp (arg1, "unlimited") == 0)
reload_count = UINT_MAX;
else
{
unsigned long int count = strtoul (arg1, NULL, 0);
if (count > UINT8_MAX - 1)
reload_count = UINT_MAX;
else
reload_count = count;
}
}
else if (strcmp (entry, "paranoia") == 0)
{
if (strcmp (arg1, "no") == 0)
paranoia = 0;
else if (strcmp (arg1, "yes") == 0)
paranoia = 1;
}
else if (strcmp (entry, "restart-interval") == 0)
{
if (arg1 != NULL)
restart_interval = atol (arg1);
else
error (0, 0, _("Must specify value for restart-interval option"));
}
else if (strcmp (entry, "auto-propagate") == 0)
{
int idx = find_db (arg1);
if (idx >= 0)
{
if (strcmp (arg2, "no") == 0)
dbs[idx].propagate = 0;
else if (strcmp (arg2, "yes") == 0)
dbs[idx].propagate = 1;
}
}
else
error (0, 0, _("Unknown option: %s %s %s"), entry, arg1, arg2);
}
while (!feof_unlocked (fp));
if (paranoia)
{
restart_time = time (NULL) + restart_interval;
/* Save the old current workding directory if we are in paranoia
mode. We have to change back to it. */
oldcwd = get_current_dir_name ();
if (oldcwd == NULL)
{
error (0, 0, _("\
cannot get current working directory: %s; disabling paranoia mode"),
strerror (errno));
paranoia = 0;
}
}
/* Enforce sanity. */
if (max_nthreads < nthreads)
max_nthreads = nthreads;
for (cnt = 0; cnt < lastdb; ++cnt)
{
size_t datasize = (sizeof (struct database_pers_head)
+ roundup (dbs[cnt].suggested_module
* sizeof (ref_t), ALIGN)
+ (dbs[cnt].suggested_module
* DEFAULT_DATASIZE_PER_BUCKET));
if (datasize > dbs[cnt].max_db_size)
{
error (0, 0, _("maximum file size for %s database too small"),
dbnames[cnt]);
dbs[cnt].max_db_size = datasize;
}
}
/* Free the buffer. */
free (line);
/* Close configuration file. */
fclose (fp);
return error_message_count != initial_error_message_count;
}