+/*-*- 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 General Public License as published by
+ the Free Software Foundation; either version 2 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.
+
+ You should have received a copy of the GNU 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 <ftw.h>
+#include <stdio.h>
+#include <limits.h>
+
+#include "log.h"
+#include "util.h"
+
+#define PROC_SYS_PREFIX "/proc/sys/"
+
+static int exit_code = 0;
+
+static void apply_sysctl(const char *property, const char *value) {
+ char *p, *n;
+ int r;
+
+ log_debug("Setting '%s' to '%s'", property, value);
+
+ if (!(p = new(char, sizeof(PROC_SYS_PREFIX) + strlen(property)))) {
+ log_error("Out of memory");
+ exit_code = -ENOMEM;
+ }
+
+ n = stpcpy(p, PROC_SYS_PREFIX);
+ strcpy(n, property);
+
+ for (; *n; n++)
+ if (*n == '.')
+ *n = '/';
+
+ if ((r = write_one_line_file(p, value)) < 0) {
+ log_warning("Failed to write '%s' to '%s': %s", value, p, strerror(-r));
+ exit_code = r;
+ }
+
+ free(p);
+}
+
+static void apply_file(const char *path) {
+ FILE *f;
+
+ assert(path);
+
+ if (!(f = fopen(path, "re"))) {
+ log_error("Failed to open file '%s', ignoring: %m", path);
+ exit_code = -errno;
+ return;
+ }
+
+ while (!feof(f)) {
+ char l[LINE_MAX], *p, *value;
+
+ if (!fgets(l, sizeof(l), f)) {
+ if (feof(f))
+ break;
+
+ log_error("Failed to read file '%s', ignoring: %m", path);
+ exit_code = -errno;
+ goto finish;
+ }
+
+ p = strstrip(l);
+
+ if (!*p)
+ continue;
+
+ if (strchr(COMMENTS, *p))
+ continue;
+
+ if (!(value = strchr(p, '='))) {
+ log_error("Line is not an assignment in file '%s': %s", path, value);
+ exit_code = -EINVAL;
+ continue;
+ }
+
+ *value = 0;
+ value++;
+
+ apply_sysctl(strstrip(p), strstrip(value));
+ }
+
+finish:
+ fclose(f);
+}
+
+static int nftw_cb(
+ const char *fpath,
+ const struct stat *sb,
+ int tflag,
+ struct FTW *ftwbuf) {
+
+ if (tflag != FTW_F)
+ return 0;
+
+ if (ignore_file(fpath + ftwbuf->base))
+ return 0;
+
+ if (!endswith(fpath, ".conf"))
+ return 0;
+
+ apply_file(fpath);
+ return 0;
+};
+
+int main(int argc, char *argv[]) {
+
+ if (argc > 2) {
+ log_error("This program expects one or no arguments.");
+ return EXIT_FAILURE;
+ }
+
+ log_set_target(LOG_TARGET_AUTO);
+ log_parse_environment();
+ log_open();
+
+ if (argc > 1)
+ nftw(argv[1], nftw_cb, 64, FTW_MOUNT|FTW_PHYS);
+ else {
+ nftw("/etc/sysctl.conf", nftw_cb, 64, FTW_MOUNT|FTW_PHYS);
+ nftw("/etc/sysctl.d", nftw_cb, 64, FTW_MOUNT|FTW_PHYS);
+ }
+
+ return exit_code < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
~ianmdlvl / elogind.git / commitdiff