198 lines
5.0 KiB
C
198 lines
5.0 KiB
C
/*-*- 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 <stdio.h>
|
|
#include <limits.h>
|
|
|
|
#include "log.h"
|
|
#include "util.h"
|
|
|
|
#define PROC_SYS_PREFIX "/proc/sys/"
|
|
|
|
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)))) {
|
|
log_error("Out of memory");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
n = stpcpy(p, PROC_SYS_PREFIX);
|
|
strcpy(n, property);
|
|
|
|
for (; *n; n++)
|
|
if (*n == '.')
|
|
*n = '/';
|
|
|
|
if ((k = write_one_line_file(p, value)) < 0) {
|
|
|
|
log_full(k == -ENOENT ? LOG_DEBUG : LOG_WARNING,
|
|
"Failed to write '%s' to '%s': %s", value, p, strerror(-k));
|
|
|
|
if (k != -ENOENT && r == 0)
|
|
r = k;
|
|
}
|
|
|
|
free(p);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int apply_file(const char *path, bool ignore_enoent) {
|
|
FILE *f;
|
|
int r = 0;
|
|
|
|
assert(path);
|
|
|
|
if (!(f = fopen(path, "re"))) {
|
|
if (ignore_enoent && errno == ENOENT)
|
|
return 0;
|
|
|
|
log_error("Failed to open file '%s', ignoring: %m", path);
|
|
return -errno;
|
|
}
|
|
|
|
while (!feof(f)) {
|
|
char l[LINE_MAX], *p, *value;
|
|
int k;
|
|
|
|
if (!fgets(l, sizeof(l), f)) {
|
|
if (feof(f))
|
|
break;
|
|
|
|
log_error("Failed to read file '%s', ignoring: %m", path);
|
|
r = -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);
|
|
|
|
if (r == 0)
|
|
r = -EINVAL;
|
|
continue;
|
|
}
|
|
|
|
*value = 0;
|
|
value++;
|
|
|
|
if ((k = apply_sysctl(strstrip(p), strstrip(value))) < 0 && r == 0)
|
|
r = k;
|
|
}
|
|
|
|
finish:
|
|
fclose(f);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int scandir_filter(const struct dirent *d) {
|
|
assert(d);
|
|
|
|
if (ignore_file(d->d_name))
|
|
return 0;
|
|
|
|
if (d->d_type != DT_REG &&
|
|
d->d_type != DT_LNK &&
|
|
d->d_type != DT_UNKNOWN)
|
|
return 0;
|
|
|
|
return endswith(d->d_name, ".conf");
|
|
}
|
|
|
|
static int apply_tree(const char *path) {
|
|
struct dirent **de = NULL;
|
|
int n, i, r = 0;
|
|
|
|
if ((n = scandir(path, &de, scandir_filter, alphasort)) < 0) {
|
|
|
|
if (errno == ENOENT)
|
|
return 0;
|
|
|
|
log_error("Failed to enumerate %s files: %m", path);
|
|
return -errno;
|
|
}
|
|
|
|
for (i = 0; i < n; i++) {
|
|
char *fn;
|
|
int k;
|
|
|
|
k = asprintf(&fn, "%s/%s", path, de[i]->d_name);
|
|
free(de[i]);
|
|
|
|
if (k < 0) {
|
|
log_error("Failed to allocate file name.");
|
|
|
|
if (r == 0)
|
|
r = -ENOMEM;
|
|
continue;
|
|
}
|
|
|
|
if ((k = apply_file(fn, true)) < 0 && r == 0)
|
|
r = k;
|
|
}
|
|
|
|
free(de);
|
|
|
|
return r;
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
int r = 0;
|
|
|
|
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)
|
|
r = apply_file(argv[1], false);
|
|
else {
|
|
int k;
|
|
|
|
r = apply_file("/etc/sysctl.conf", true);
|
|
|
|
if ((k = apply_tree("/etc/sysctl.d")) < 0 && r == 0)
|
|
r = k;
|
|
}
|
|
|
|
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
|
|
}
|