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/*-*- 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;
return;
}
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_full(r == -ENOENT ? LOG_DEBUG : LOG_WARNING,
"Failed to write '%s' to '%s': %s", value, p, strerror(-r));
if (r != -ENOENT)
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;
}
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