feat(systime): gettimeofday/itimer/utimes

src/time/setitimer.c

@@ -0,0 +1,26 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <sys/time.h>
+
+#include "../internal/syscall.h"
+
+#if VLIBC_LEVEL_GE(2)
+
+/*
+ * setitimer: arm (or disarm) interval timer which (ITIMER_REAL,
+ * ITIMER_VIRTUAL or ITIMER_PROF), via SYS_setitimer. struct itimerval is
+ * layout-identical to the kernel's two-timeval structure on x86_64, so both
+ * pointers pass straight through: value NULL leaves the timer unchanged,
+ * it_value zero disarms it, and the previous setting is stored through
+ * ovalue when it is not NULL. An unknown which or an invalid pointer is
+ * rejected by the kernel (EINVAL / EFAULT), reported as -1 with errno set.
+ */
+int
+setitimer(int which, const struct itimerval *restrict value, struct itimerval *restrict ovalue)
+{
+    return syscall_ret(__syscall3(SYS_setitimer, which, (long)value, (long)ovalue));
+}
+
+#endif /* VLIBC_LEVEL_GE(2) */