libc: Add gettimeofday()

libc/include/bits/timespec.h

@@ -1,4 +1,4 @@
-/* bits/timespec.h: The timespec structure. */
+/* bits/timespec.h: The timespec and timeval structures. */
 
 #ifndef _BITS_TIMESPEC_H
 #define _BITS_TIMESPEC_H
@@ -11,4 +11,10 @@ struct timespec
     long tv_nsec;
 };
 
+struct timeval
+{
+    time_t tv_sec;
+    suseconds_t tv_usec;
+};
+
 #endif

libc/include/sys/time.h

@@ -0,0 +1,21 @@
+/* sys/time.h: POSIX time types. */
+
+#ifndef _SYS_TIME_H
+#define _SYS_TIME_H
+
+#include <bits/attrs.h>
+#include <bits/timespec.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /* Get the current time of day. */
+    __deprecated int gettimeofday(struct timeval* tp, void* timezone);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

libc/include/sys/types.h

@@ -19,6 +19,7 @@ typedef __u64_t ino_t;
 typedef __u32_t uid_t;
 typedef __u32_t gid_t;
 typedef __u64_t nlink_t;
+typedef __i64_t suseconds_t;
 
 typedef off_t fpos_t;
 

libc/src/time.cpp

@@ -1,6 +1,8 @@
 #include <bits/errno-return.h>
 #include <luna/Check.h>
 #include <luna/Format.h>
+#include <stdio.h>
+#include <stdlib.h>
 #include <sys/syscall.h>
 #include <time.h>
 #include <unistd.h>
@@ -148,4 +150,21 @@ extern "C"
     {
         return asctime(localtime(tp));
     }
+
+    int gettimeofday(struct timeval* tp, void* timezone)
+    {
+        if (timezone)
+        {
+            fputs("gettimeofday: timezone was not NULL, abort\n", stderr);
+            abort();
+        }
+
+        struct timespec ts;
+        if (clock_gettime(CLOCK_REALTIME, &ts) < 0) return -1;
+
+        tp->tv_sec = ts.tv_sec;
+        tp->tv_usec = ts.tv_nsec / 1000;
+
+        return 0;
+    }
 }