summaryrefslogtreecommitdiff
path: root/src/libshared/sysctl-util.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/libshared/sysctl-util.c')
-rw-r--r--src/libshared/sysctl-util.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/src/libshared/sysctl-util.c b/src/libshared/sysctl-util.c
new file mode 100644
index 0000000000..e1ccb3294c
--- /dev/null
+++ b/src/libshared/sysctl-util.c
@@ -0,0 +1,73 @@
+/***
+ 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 <stdio.h>
+#include <string.h>
+
+#include "fileio.h"
+#include "log.h"
+#include "macro.h"
+#include "string-util.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);
+}