/*-*- 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 "build.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) { char *p; assert(property); assert(value); log_debug("Setting '%s' to '%s'", property, value); p = strjoina("/proc/sys/", property); return write_string_file(p, value, 0); } int sysctl_read(const char *property, char **content) { char *p; assert(property); assert(content); p = strjoina("/proc/sys/", property); return read_full_file(p, content, NULL); }