89 lines
2.3 KiB
C
89 lines
2.3 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 Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser 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 <getopt.h>
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#include "log.h"
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#include "util.h"
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#include "fileio.h"
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#include "build.h"
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#include "sysctl-util.h"
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char *sysctl_normalize(char *s) {
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char *n;
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n = strpbrk(s, "/.");
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/* If the first separator is a slash, the path is
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* assumed to be normalized and slashes remain slashes
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* and dots remains dots. */
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if (!n || *n == '/')
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return s;
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/* Otherwise, dots become slashes and slashes become
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* dots. Fun. */
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while (n) {
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if (*n == '.')
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*n = '/';
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else
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*n = '.';
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n = strpbrk(n + 1, "/.");
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}
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return s;
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}
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int sysctl_write(const char *property, const char *value) {
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_cleanup_free_ char *p = NULL;
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char *n;
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log_debug("Setting '%s' to '%s'", property, value);
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p = new(char, strlen("/proc/sys/") + strlen(property) + 1);
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if (!p)
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return log_oom();
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n = stpcpy(p, "/proc/sys/");
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strcpy(n, property);
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return write_string_file(p, value);
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}
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int sysctl_read(const char *property, char **content) {
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_cleanup_free_ char *p = NULL;
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char *n;
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p = new(char, strlen("/proc/sys/") + strlen(property) + 1);
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if (!p)
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return log_oom();
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n = stpcpy(p, "/proc/sys/");
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strcpy(n, property);
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return read_full_file(p, content, NULL);
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}
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