add clock_gettime and time

src/platform/src/linux/mod.rs

@@ -170,3 +170,7 @@ pub fn waitpid(pid: pid_t, stat_loc: *mut c_int, options: c_int) -> pid_t {
 pub fn write(fildes: c_int, buf: &[u8]) -> ssize_t {
     e(unsafe { syscall!(WRITE, fildes, buf.as_ptr(), buf.len()) }) as ssize_t
 }
+
+pub fn clock_gettime(clk_id: clockid_t, tp: *mut timespec) -> c_int {
+    e(unsafe { syscall!(CLOCK_GETTIME, clk_id, tp) }) as c_int
+}

src/platform/src/redox/mod.rs

@@ -220,3 +220,17 @@ pub fn waitpid(pid: pid_t, stat_loc: *mut c_int, options: c_int) -> pid_t {
 pub fn write(fd: c_int, buf: &[u8]) -> ssize_t {
     e(syscall::write(fd as usize, buf)) as ssize_t
 }
+
+pub fn clock_gettime(clk_id: clockid_t, tp: *mut timespec) -> c_int {
+    let mut redox_tp = unsafe { redox_timespec::from(&*tp) };
+    match e(syscall::clock_gettime(clk_id as usize, &mut redox_tp)) as c_int {
+        -1 => -1,
+        _ => {
+            unsafe {
+                (*tp).tv_sec = redox_tp.tv_sec;
+                (*tp).tv_nsec = redox_tp.tv_nsec as i64;
+            };
+            0
+        }
+    }
+}

src/platform/src/types.rs

@@ -68,6 +68,7 @@ pub type clockid_t = i32;
 pub type timer_t = c_void;
 
 #[repr(C)]
+#[derive(Default)]
 pub struct timespec {
     pub tv_sec: time_t,
     pub tv_nsec: c_long,

src/time/cbindgen.toml

@@ -4,3 +4,7 @@ language = "C"
 
 [enum]
 prefix_with_name = true
+
+[defines]
+"target_os = linux" = "__linux__"
+"target_os = redox" = "__redox__"

src/time/src/lib.rs

@@ -6,6 +6,33 @@ extern crate platform;
 
 use platform::types::*;
 
+#[cfg(target_os = "redox")]
+pub const CLOCK_REALTIME: c_int = 1;
+#[cfg(target_os = "redox")]
+pub const CLOCK_MONOTONIC: c_int = 4;
+#[cfg(target_os = "linux")]
+pub const CLOCK_REALTIME: c_int = 0;
+#[cfg(target_os = "linux")]
+pub const CLOCK_MONOTONIC: c_int = 1;
+#[cfg(target_os = "linux")]
+pub const CLOCK_PROCESS_CPUTIME_ID: c_int = 2;
+#[cfg(target_os = "linux")]
+pub const CLOCK_THREAD_CPUTIME_ID: c_int = 3;
+#[cfg(target_os = "linux")]
+pub const CLOCK_MONOTONIC_RAW: c_int = 4;
+#[cfg(target_os = "linux")]
+pub const CLOCK_REALTIME_COARSE: c_int = 5;
+#[cfg(target_os = "linux")]
+pub const CLOCK_MONOTONIC_COARSE: c_int = 6;
+#[cfg(target_os = "linux")]
+pub const CLOCK_BOOTTIME: c_int = 7;
+#[cfg(target_os = "linux")]
+pub const CLOCK_REALTIME_ALARM: c_int = 8;
+#[cfg(target_os = "linux")]
+pub const CLOCK_BOOTTIME_ALARM: c_int = 9;
+#[cfg(target_os = "linux")]
+pub const CLOCK_TAI: c_int = 11;
+
 /*
  *#[repr(C)]
  *pub struct timespec {
@@ -59,7 +86,7 @@ pub extern "C" fn clock_getres(clock_id: clockid_t, res: *mut timespec) -> c_int
 
 #[no_mangle]
 pub extern "C" fn clock_gettime(clock_id: clockid_t, tp: *mut timespec) -> c_int {
-    unimplemented!();
+    platform::clock_gettime(clock_id, tp)
 }
 
 #[no_mangle]
@@ -134,7 +161,14 @@ pub extern "C" fn strptime(buf: *const c_char, format: *const c_char, tm: *mut t
 
 #[no_mangle]
 pub extern "C" fn time(tloc: *mut time_t) -> time_t {
-    unimplemented!();
+    let mut ts: timespec = Default::default();
+    platform::clock_gettime(CLOCK_REALTIME, &mut ts);
+    unsafe {
+        if !tloc.is_null() {
+            *tloc = ts.tv_sec
+        };
+    }
+    ts.tv_sec
 }
 
 #[no_mangle]

tests/.gitignore

@@ -47,4 +47,4 @@
 /unlink
 /waitpid
 /write
-
+/time

tests/Makefile

@@ -41,7 +41,8 @@ EXPECT_BINS=\
 	unistd/getopt \
 	unlink \
 	waitpid \
-	write
+	write \
+	time
 
 # Binaries that may generate varied output
 BINS=\

tests/time.c

@@ -0,0 +1,11 @@
+#include <time.h>
+#include <stdio.h>
+
+int main(int argc, char** argv) {
+    timespec tm = {0, 0};
+    clock_gettime(CLOCK_REALTIME, &tm);
+    perror("clock_gettime");
+    time(NULL);
+    perror("time");
+    return 0;
+}