diff options
| -rw-r--r-- | src/shared/Makefile.am | 2 | ||||
| -rw-r--r-- | src/shared/sysctl-util.c | 87 | ||||
| -rw-r--r-- | src/shared/sysctl-util.h | 27 |
3 files changed, 116 insertions, 0 deletions
diff --git a/src/shared/Makefile.am b/src/shared/Makefile.am index bb695f8720..dde3e27b56 100644 --- a/src/shared/Makefile.am +++ b/src/shared/Makefile.am @@ -24,6 +24,7 @@ libudev_shared_la_SOURCES=\ strbuf.c \ strv.c \ strxcpyx.c \ + sysctl-util.c \ time-util.c \ util.c \ utf8.c \ @@ -57,6 +58,7 @@ noinst_HEADERS = \ strbuf.h \ strv.h \ strxcpyx.h \ + sysctl-util.h \ time-util.h \ util.h \ utf8.h \ diff --git a/src/shared/sysctl-util.c b/src/shared/sysctl-util.c new file mode 100644 index 0000000000..87c3389e2e --- /dev/null +++ b/src/shared/sysctl-util.c @@ -0,0 +1,87 @@ +/*-*- 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); +} diff --git a/src/shared/sysctl-util.h b/src/shared/sysctl-util.h new file mode 100644 index 0000000000..2ee6454e52 --- /dev/null +++ b/src/shared/sysctl-util.h @@ -0,0 +1,27 @@ +/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ + +#pragma once + +/*** + This file is part of systemd. + + Copyright 2011 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/>. +***/ + +char *sysctl_normalize(char *s); +int sysctl_read(const char *property, char **value); +int sysctl_write(const char *property, const char *value); + |