feat(systime): gettimeofday/itimer/utimes

src/time/settimeofday.c

@@ -0,0 +1,34 @@
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+
+#include <sys/time.h>
+
+#include "../internal/syscall.h"
+
+#if VLIBC_LEVEL_GE(2)
+
+/*
+ * settimeofday: set the kernel clock, via SYS_settimeofday.
+ *
+ * Requires privilege (the unprivileged caller gets EPERM from the kernel).
+ * The tz argument is honored only alongside tv; passing a timezone record
+ * while tv is NULL would ask the kernel to update its timezone state alone,
+ * a legacy use no caller needs, so it is refused up front with ENOTSUP (the
+ * Linux spelling of the value musl reports here; <errno.h> carries it as
+ * EOPNOTSUPP).
+ */
+int
+settimeofday(const struct timeval *tv, const struct timezone *tz)
+{
+    if (tz != NULL && tv == NULL)
+    {
+        errno = EOPNOTSUPP;
+        return -1;
+    }
+    return syscall_ret(__syscall2(SYS_settimeofday, (long)tv, (long)tz));
+}
+
+#endif /* VLIBC_LEVEL_GE(2) */