+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- 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 <stdlib.h>
-#include <stdbool.h>
-#include <errno.h>
-#include <string.h>
-#include <stdio.h>
-#include <limits.h>
-#include <getopt.h>
-
-#include "log.h"
-#include "strv.h"
-#include "util.h"
-#include "hashmap.h"
-#include "path-util.h"
-#include "conf-files.h"
-#include "fileio.h"
-#include "build.h"
-#include "sysctl-util.h"
-
-static char **arg_prefixes = NULL;
-
-static const char conf_file_dirs[] = CONF_DIRS_NULSTR("sysctl");
-
-static int apply_all(Hashmap *sysctl_options) {
- int r = 0;
- char *property, *value;
- Iterator i;
-
- assert(sysctl_options);
-
- HASHMAP_FOREACH_KEY(value, property, sysctl_options, i) {
- int k;
-
- k = sysctl_write(property, value);
- if (k < 0) {
- log_full(k == -ENOENT ? LOG_DEBUG : LOG_WARNING,
- "Failed to write '%s' to '%s': %s", value, property, strerror(-k));
-
- if (r == 0)
- r = k;
- }
- }
- return r;
-}
-
-static int parse_file(Hashmap *sysctl_options, const char *path, bool ignore_enoent) {
- _cleanup_fclose_ FILE *f = NULL;
- int r;
-
- assert(path);
-
- r = search_and_fopen_nulstr(path, "re", NULL, conf_file_dirs, &f);
- if (r < 0) {
- if (ignore_enoent && r == -ENOENT)
- return 0;
-
- return log_error_errno(r, "Failed to open file '%s', ignoring: %m", path);
- }
-
- log_debug("Parsing %s", path);
- while (!feof(f)) {
- char l[LINE_MAX], *p, *value, *new_value, *property, *existing;
- void *v;
- int k;
-
- if (!fgets(l, sizeof(l), f)) {
- if (feof(f))
- break;
-
- log_error_errno(errno, "Failed to read file '%s', ignoring: %m", path);
- return -errno;
- }
-
- p = strstrip(l);
- if (!*p)
- continue;
-
- if (strchr(COMMENTS "\n", *p))
- continue;
-
- value = strchr(p, '=');
- if (!value) {
- log_error("Line is not an assignment in file '%s': %s", path, value);
-
- if (r == 0)
- r = -EINVAL;
- continue;
- }
-
- *value = 0;
- value++;
-
- p = sysctl_normalize(strstrip(p));
- value = strstrip(value);
-
- 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;
- }
-
-found:
- existing = hashmap_get2(sysctl_options, p, &v);
- if (existing) {
- if (streq(value, existing))
- continue;
-
- log_debug("Overwriting earlier assignment of %s in file '%s'.", p, path);
- free(hashmap_remove(sysctl_options, p));
- free(v);
- }
-
- property = strdup(p);
- if (!property)
- return log_oom();
-
- new_value = strdup(value);
- if (!new_value) {
- free(property);
- return log_oom();
- }
-
- k = hashmap_put(sysctl_options, property, new_value);
- if (k < 0) {
- log_error_errno(k, "Failed to add sysctl variable %s to hashmap: %m", property);
- free(property);
- free(new_value);
- 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"
- , program_invocation_short_name);
-}
-
-static int parse_argv(int argc, char *argv[]) {
-
- enum {
- ARG_VERSION = 0x100,
- ARG_PREFIX
- };
-
- static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, ARG_VERSION },
- { "prefix", required_argument, NULL, ARG_PREFIX },
- {}
- };
-
- 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_VERSION:
- puts(PACKAGE_STRING);
- puts(SYSTEMD_FEATURES);
- return 0;
-
- case ARG_PREFIX: {
- char *p;
-
- /* We used to require people to specify absolute paths
- * in /proc/sys in the past. This is kinda useless, but
- * we need to keep compatibility. We now support any
- * sysctl name available. */
- sysctl_normalize(optarg);
- if (startswith(optarg, "/proc/sys"))
- p = strdup(optarg);
- else
- p = strappend("/proc/sys/", optarg);
-
- 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 main(int argc, char *argv[]) {
- int r = 0, k;
- Hashmap *sysctl_options;
-
- 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();
-
- umask(0022);
-
- sysctl_options = hashmap_new(&string_hash_ops);
- if (!sysctl_options) {
- r = log_oom();
- goto finish;
- }
-
- r = 0;
-
- if (argc > optind) {
- int i;
-
- for (i = optind; i < argc; i++) {
- k = parse_file(sysctl_options, argv[i], false);
- if (k < 0 && r == 0)
- r = k;
- }
- } else {
- _cleanup_strv_free_ char **files = NULL;
- char **f;
-
- r = conf_files_list_nulstr(&files, ".conf", NULL, conf_file_dirs);
- 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;
-
-finish:
- hashmap_free_free_free(sysctl_options);
- strv_free(arg_prefixes);
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}
~ianmdlvl / elogind.git / commitdiff