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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 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 "util.h"
#include "fileio.h"
#include "sysctl-util.h"
char *sysctl_normalize(char *s) {
char *n;
n = strpbrk(s, "/.");
/* If the first separator is a slash, the path is
* assumed to be normalized and slashes remain slashes
* and dots remains dots. */
if (!n || *n == '/')
return s;
/* Otherwise, dots become slashes and slashes become
* dots. Fun. */
while (n) {
if (*n == '.')
*n = '/';
else
*n = '.';
n = strpbrk(n + 1, "/.");
}
return s;
}
int sysctl_write(const char *property, const char *value) {
_cleanup_free_ char *p = NULL;
char *n;
log_debug("Setting '%s' to '%s'", property, value);
p = new(char, strlen("/proc/sys/") + strlen(property) + 1);
if (!p)
return log_oom();
n = stpcpy(p, "/proc/sys/");
strcpy(n, property);
return write_string_file(p, value);
}
int sysctl_read(const char *property, char **content) {
_cleanup_free_ char *p = NULL;
char *n;
p = new(char, strlen("/proc/sys/") + strlen(property) + 1);
if (!p)
return log_oom();
n = stpcpy(p, "/proc/sys/");
strcpy(n, property);
return read_full_file(p, content, NULL);
}
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