166 lines
4.4 KiB
C
166 lines
4.4 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdlib.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <limits.h>
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#include "log.h"
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#include "strv.h"
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#include "util.h"
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#define PROC_SYS_PREFIX "/proc/sys/"
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static int apply_sysctl(const char *property, const char *value) {
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char *p, *n;
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int r = 0, k;
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log_debug("Setting '%s' to '%s'", property, value);
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if (!(p = new(char, sizeof(PROC_SYS_PREFIX) + strlen(property)))) {
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log_error("Out of memory");
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return -ENOMEM;
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}
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n = stpcpy(p, PROC_SYS_PREFIX);
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strcpy(n, property);
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for (; *n; n++)
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if (*n == '.')
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*n = '/';
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if ((k = write_one_line_file(p, value)) < 0) {
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log_full(k == -ENOENT ? LOG_DEBUG : LOG_WARNING,
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"Failed to write '%s' to '%s': %s", value, p, strerror(-k));
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if (k != -ENOENT && r == 0)
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r = k;
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}
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free(p);
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return r;
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}
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static int apply_file(const char *path, bool ignore_enoent) {
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FILE *f;
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int r = 0;
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assert(path);
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if (!(f = fopen(path, "re"))) {
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if (ignore_enoent && errno == ENOENT)
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return 0;
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log_error("Failed to open file '%s', ignoring: %m", path);
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return -errno;
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}
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log_debug("apply: %s\n", path);
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while (!feof(f)) {
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char l[LINE_MAX], *p, *value;
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int k;
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if (!fgets(l, sizeof(l), f)) {
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if (feof(f))
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break;
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log_error("Failed to read file '%s', ignoring: %m", path);
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r = -errno;
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goto finish;
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}
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p = strstrip(l);
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if (!*p)
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continue;
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if (strchr(COMMENTS, *p))
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continue;
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if (!(value = strchr(p, '='))) {
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log_error("Line is not an assignment in file '%s': %s", path, value);
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if (r == 0)
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r = -EINVAL;
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continue;
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}
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*value = 0;
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value++;
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if ((k = apply_sysctl(strstrip(p), strstrip(value))) < 0 && r == 0)
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r = k;
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}
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finish:
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fclose(f);
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return r;
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}
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int main(int argc, char *argv[]) {
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int r = 0;
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if (argc > 2) {
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log_error("This program expects one or no arguments.");
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return EXIT_FAILURE;
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}
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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if (argc > 1)
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r = apply_file(argv[1], false);
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else {
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char **files, **f;
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apply_file("/etc/sysctl.conf", true);
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r = conf_files_list(&files, ".conf",
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"/run/sysctl.d",
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"/etc/sysctl.d",
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"/usr/lib/sysctl.d",
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NULL);
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if (r < 0) {
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log_error("Failed to enumerate sysctl.d files: %s", strerror(-r));
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goto finish;
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}
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STRV_FOREACH(f, files) {
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int k;
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k = apply_file(*f, true);
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if (k < 0 && r == 0)
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r = k;
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}
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strv_free(files);
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}
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finish:
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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