Add klogctl and KLOG constants on linux_like

libc-test/semver/linux.txt

@@ -1339,6 +1339,17 @@ KEY_SPEC_SESSION_KEYRING
 KEY_SPEC_THREAD_KEYRING
 KEY_SPEC_USER_KEYRING
 KEY_SPEC_USER_SESSION_KEYRING
+KLOG_CLOSE
+KLOG_OPEN
+KLOG_READ
+KLOG_READ_ALL
+KLOG_READ_CLEAR
+KLOG_CLEAR
+KLOG_CONSOLE_OFF
+KLOG_CONSOLE_ON
+KLOG_CONSOLE_LEVEL
+KLOG_SIZE_UNREAD
+KLOG_SIZE_BUFFER
 LC_COLLATE
 LC_COLLATE_MASK
 LC_CTYPE
@@ -3559,6 +3570,7 @@ j1939_filter
 jrand48
 key_t
 killpg
+klogctl
 labs
 lcong48
 lgetxattr

src/unix/linux_like/mod.rs

@@ -1417,6 +1417,18 @@ pub const ARPHRD_IEEE802154: u16 = 804;
 pub const ARPHRD_VOID: u16 = 0xFFFF;
 pub const ARPHRD_NONE: u16 = 0xFFFE;
 
+pub const KLOG_CLOSE: ::c_int = 0;
+pub const KLOG_OPEN: ::c_int = 1;
+pub const KLOG_READ: ::c_int = 2;
+pub const KLOG_READ_ALL: ::c_int = 3;
+pub const KLOG_READ_CLEAR: ::c_int = 4;
+pub const KLOG_CLEAR: ::c_int = 5;
+pub const KLOG_CONSOLE_OFF: ::c_int = 6;
+pub const KLOG_CONSOLE_ON: ::c_int = 7;
+pub const KLOG_CONSOLE_LEVEL: ::c_int = 8;
+pub const KLOG_SIZE_UNREAD: ::c_int = 9;
+pub const KLOG_SIZE_BUFFER: ::c_int = 10;
+
 cfg_if! {
     if #[cfg(target_os = "emscripten")] {
         // Emscripten does not define any `*_SUPER_MAGIC` constants.
@@ -1790,6 +1802,9 @@ extern "C" {
         locale: ::locale_t,
     ) -> ::size_t;
     pub fn strptime(s: *const ::c_char, format: *const ::c_char, tm: *mut ::tm) -> *mut ::c_char;
+
+    // #include<klog.h>
+    pub fn klogctl(syslog_type: ::c_int, buf: *mut ::c_char, len: ::c_int) -> ::c_int;
 }
 
 // LFS64 extensions