sysctl.c revision 3ffd4af22052963e7a29431721ee204e634bea75
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "conf-files.h"
#include "fd-util.h"
#include "fileio.h"
#include "hashmap.h"
#include "log.h"
#include "path-util.h"
#include "string-util.h"
#include "strv.h"
#include "sysctl-util.h"
#include "util.h"
static char **arg_prefixes = NULL;
Iterator i;
int r = 0;
int k;
if (k < 0) {
if (r == 0 && k != -ENOENT)
r = k;
}
}
return r;
}
int r;
if (r < 0) {
if (ignore_enoent && r == -ENOENT)
return 0;
}
while (!feof(f)) {
void *v;
int k;
if (!fgets(l, sizeof(l), f)) {
if (feof(f))
break;
return -errno;
}
p = strstrip(l);
if (!*p)
continue;
continue;
if (!value) {
if (r == 0)
r = -EINVAL;
continue;
}
*value = 0;
value++;
p = sysctl_normalize(strstrip(p));
if (!strv_isempty(arg_prefixes)) {
char **i, *t;
STRV_FOREACH(i, arg_prefixes) {
t = path_startswith(*i, "/proc/sys/");
if (t == NULL)
t = *i;
if (path_startswith(p, t))
goto found;
}
/* not found */
continue;
}
if (existing) {
continue;
free(v);
}
if (!property)
return log_oom();
if (!new_value) {
return log_oom();
}
if (k < 0) {
return k;
}
}
return r;
}
static void help(void) {
printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
"Applies kernel sysctl settings.\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --prefix=PATH Only apply rules with the specified prefix\n"
}
enum {
ARG_VERSION = 0x100,
};
{}
};
int c;
switch (c) {
case 'h':
help();
return 0;
case ARG_VERSION:
return version();
case ARG_PREFIX: {
char *p;
/* We used to require people to specify absolute paths
* we need to keep compatibility. We now support any
* sysctl name available. */
else
if (!p)
return log_oom();
if (strv_consume(&arg_prefixes, p) < 0)
return log_oom();
break;
}
case '?':
return -EINVAL;
default:
assert_not_reached("Unhandled option");
}
return 1;
}
int r = 0, k;
if (r <= 0)
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
log_open();
umask(0022);
if (!sysctl_options) {
r = log_oom();
goto finish;
}
r = 0;
int i;
if (k < 0 && r == 0)
r = k;
}
} else {
char **f;
if (r < 0) {
log_error_errno(r, "Failed to enumerate sysctl.d files: %m");
goto finish;
}
STRV_FOREACH(f, files) {
k = parse_file(sysctl_options, *f, true);
if (k < 0 && r == 0)
r = k;
}
}
k = apply_all(sysctl_options);
if (k < 0 && r == 0)
r = k;
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}