feat(systime): gettimeofday/itimer/utimes

src/time/gettimeofday.c

@@ -0,0 +1,29 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/time.h>
+
+#include "../internal/syscall.h"
+
+#if VLIBC_LEVEL_GE(2)
+
+/*
+ * gettimeofday: the current wall-clock time, via SYS_gettimeofday.
+ *
+ * The kernel writes the two-field struct timeval (tv_sec, tv_usec) that is
+ * layout-identical to the public struct timeval on x86_64, so the pointer
+ * passes straight through. The tz argument is deliberately ignored: the
+ * historic second parameter is obsolete, POSIX.1-2008 removed struct
+ * timezone, and no caller may rely on it being filled — NULL is passed to
+ * the kernel, which then leaves any timezone record untouched. tv may also
+ * be NULL, in which case the kernel writes nothing and 0 is returned.
+ */
+int
+gettimeofday(struct timeval *restrict tv, void *restrict tz)
+{
+    (void)tz;
+    return syscall_ret(__syscall2(SYS_gettimeofday, (long)tv, 0));
+}
+
+#endif /* VLIBC_LEVEL_GE(2) */