Copyright 2010 Lennart Poettering
systemd 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 2 of the License, or
+ 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
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ 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 <string.h>
#include <stdio.h>
#include <limits.h>
+#include <getopt.h>
#include "log.h"
#include "strv.h"
#include "util.h"
+#include "strv.h"
#define PROC_SYS_PREFIX "/proc/sys/"
+static char **arg_prefixes = NULL;
+
static int apply_sysctl(const char *property, const char *value) {
char *p, *n;
int r = 0, k;
log_debug("Setting '%s' to '%s'", property, value);
- if (!(p = new(char, sizeof(PROC_SYS_PREFIX) + strlen(property)))) {
+ p = new(char, sizeof(PROC_SYS_PREFIX) + strlen(property));
+ if (!p) {
log_error("Out of memory");
return -ENOMEM;
}
if (*n == '.')
*n = '/';
- if ((k = write_one_line_file(p, value)) < 0) {
+ if (!strv_isempty(arg_prefixes)) {
+ char **i;
+ bool good = false;
+
+ STRV_FOREACH(i, arg_prefixes)
+ if (path_startswith(p, *i)) {
+ good = true;
+ break;
+ }
+
+ if (!good) {
+ log_debug("Skipping %s", p);
+ free(p);
+ return 0;
+ }
+ }
+
+ k = write_one_line_file(p, value);
+ if (k < 0) {
log_full(k == -ENOENT ? LOG_DEBUG : LOG_WARNING,
"Failed to write '%s' to '%s': %s", value, p, strerror(-k));
return r;
}
+static int help(void) {
+
+ printf("%s [OPTIONS...] [CONFIGURATION FILE...]\n\n"
+ "Applies kernel sysctl settings.\n\n"
+ " -h --help Show this help\n"
+ " --prefix=PATH Only apply rules that apply to paths with the specified prefix\n",
+ program_invocation_short_name);
+
+ return 0;
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_PREFIX
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "prefix", required_argument, NULL, ARG_PREFIX },
+ { NULL, 0, NULL, 0 }
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_PREFIX: {
+ char *p;
+ char **l;
+
+ for (p = optarg; *p; p++)
+ if (*p == '.')
+ *p = '/';
+
+ l = strv_append(arg_prefixes, optarg);
+ if (!l) {
+ log_error("Out of memory");
+ return -ENOMEM;
+ }
+
+ strv_free(arg_prefixes);
+ arg_prefixes = l;
+
+ break;
+ }
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ log_error("Unknown option code %c", c);
+ return -EINVAL;
+ }
+ }
+
+ return 1;
+}
+
int main(int argc, char *argv[]) {
int r = 0;
- if (argc > 2) {
- log_error("This program expects one or no arguments.");
- return EXIT_FAILURE;
- }
+ r = parse_argv(argc, argv);
+ if (r <= 0)
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
log_set_target(LOG_TARGET_AUTO);
log_parse_environment();
log_open();
- if (argc > 1)
- r = apply_file(argv[1], false);
- else {
- char **files, **f;
+ umask(0022);
- apply_file("/etc/sysctl.conf", true);
+ if (argc > optind) {
+ int i;
+
+ for (i = optind; i < argc; i++) {
+ int k;
+
+ k = apply_file(argv[i], false);
+ if (k < 0 && r == 0)
+ r = k;
+ }
+ } else {
+ char **files, **f;
+ int k;
r = conf_files_list(&files, ".conf",
- "/run/sysctl.d",
"/etc/sysctl.d",
- "/usr/local/sysctl.d",
+ "/run/sysctl.d",
+ "/usr/local/lib/sysctl.d",
"/usr/lib/sysctl.d",
+#ifdef HAVE_SPLIT_USR
"/lib/sysctl.d",
+#endif
NULL);
if (r < 0) {
log_error("Failed to enumerate sysctl.d files: %s", strerror(-r));
}
STRV_FOREACH(f, files) {
- int k;
-
k = apply_file(*f, true);
if (k < 0 && r == 0)
r = k;
}
+ k = apply_file("/etc/sysctl.conf", true);
+ if (k < 0 && r == 0)
+ r = k;
+
strv_free(files);
}
finish:
+ strv_free(arg_prefixes);
+
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}