src/basic/sysctl-util.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 #include <stdbool.h>
   5 #include <stdint.h>
   6
   7 #include "macro.h"
   8 #include "stdio-util.h"
   9 #include "string-util.h"
  10
  11 char *sysctl_normalize(char *s);
  12 int sysctl_read(const char *property, char **value);
  13 int sysctl_write(const char *property, const char *value);
  14 int sysctl_writef(const char *property, const char *format, ...) _printf_(2, 3);
  15
  16 int sysctl_read_ip_property(int af, const char *ifname, const char *property, char **ret);
  17 int sysctl_write_ip_property(int af, const char *ifname, const char *property, const char *value);
  18 static inline int sysctl_write_ip_property_boolean(int af, const char *ifname, const char *property, bool value) {
  19         return sysctl_write_ip_property(af, ifname, property, one_zero(value));
  20 }
  21
  22 int sysctl_write_ip_neighbor_property(int af, const char *ifname, const char *property, const char *value);
  23 static inline int sysctl_write_ip_neighbor_property_uint32(int af, const char *ifname, const char *property, uint32_t value) {
  24         char buf[DECIMAL_STR_MAX(uint32_t)];
  25         xsprintf(buf, "%u", value);
  26         return sysctl_write_ip_neighbor_property(af, ifname, property, buf);
  27 }
  28
  29 #define DEFINE_SYSCTL_WRITE_IP_PROPERTY(name, type, format)           \
  30         static inline int sysctl_write_ip_property_##name(int af, const char *ifname, const char *property, type value) { \
  31                 char buf[DECIMAL_STR_MAX(type)];                        \
  32                 xsprintf(buf, format, value);                           \
  33                 return sysctl_write_ip_property(af, ifname, property, buf); \
  34         }
  35
  36 DEFINE_SYSCTL_WRITE_IP_PROPERTY(int, int, "%i");
  37 DEFINE_SYSCTL_WRITE_IP_PROPERTY(uint32, uint32_t, "%" PRIu32);