#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
-#include <string.h>
#include <unistd.h>
#include "fd-util.h"
assert(property);
assert(value);
- log_debug("Setting '%s' to '%s'", property, value);
+ log_debug("Setting '%s' to '%.*s'.", property, (int) strcspn(value, NEWLINE), value);
p = strjoina("/proc/sys/", property);
fd = open(p, O_WRONLY|O_CLOEXEC);
return 0;
}
+int sysctl_writef(const char *property, const char *format, ...) {
+ _cleanup_free_ char *v = NULL;
+ va_list ap;
+ int r;
+
+ va_start(ap, format);
+ r = vasprintf(&v, format, ap);
+ va_end(ap);
+
+ if (r < 0)
+ return -ENOMEM;
+
+ return sysctl_write(property, v);
+}
+
+int sysctl_write_ip_property(int af, const char *ifname, const char *property, const char *value) {
+ const char *p;
+
+ assert(IN_SET(af, AF_INET, AF_INET6));
+ assert(property);
+ assert(value);
+
+ p = strjoina("/proc/sys/net/ipv", af == AF_INET ? "4" : "6",
+ ifname ? "/conf/" : "", strempty(ifname),
+ property[0] == '/' ? "" : "/", property);
+
+ log_debug("Setting '%s' to '%s'", p, value);
+
+ return write_string_file(p, value, WRITE_STRING_FILE_VERIFY_ON_FAILURE | WRITE_STRING_FILE_DISABLE_BUFFER);
+}
+
int sysctl_read(const char *property, char **content) {
char *p;
p = strjoina("/proc/sys/", property);
return read_full_file(p, content, NULL);
}
+
+int sysctl_read_ip_property(int af, const char *ifname, const char *property, char **ret) {
+ _cleanup_free_ char *value = NULL;
+ const char *p;
+ int r;
+
+ assert(IN_SET(af, AF_INET, AF_INET6));
+ assert(property);
+
+ p = strjoina("/proc/sys/net/ipv", af == AF_INET ? "4" : "6",
+ ifname ? "/conf/" : "", strempty(ifname),
+ property[0] == '/' ? "" : "/", property);
+
+ r = read_one_line_file(p, &value);
+ if (r < 0)
+ return r;
+
+ if (ret)
+ *ret = TAKE_PTR(value);
+
+ return r;
+}