tools/nolibc/time: create time.h with time()

The time() syscall is used by a few simple applications, and is trivial
to implement based on gettimeofday() that we already have. Let's create
the file to ease porting and provide the function. It never returns any
error, though it may segfault in case of invalid pointer, like other
implementations relying on gettimeofday().

Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h
index 0f375e901a365a55743566007e4855534572eb76..561dcdb83cee54acb2d12b55e855f280c9404eef 100644 (file)
--- a/tools/include/nolibc/nolibc.h
+++ b/tools/include/nolibc/nolibc.h
@@ -92,6 +92,7 @@
 #include "stdio.h"
 #include "stdlib.h"
 #include "string.h"
+#include "time.h"
 #include "unistd.h"
 
 /* Used by programs to avoid std includes */

diff --git a/tools/include/nolibc/time.h b/tools/include/nolibc/time.h
new file mode 100644 (file)
index 0000000..d18b766
--- /dev/null
+++ b/tools/include/nolibc/time.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
+/*
+ * time function definitions for NOLIBC
+ * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
+ */
+
+#ifndef _NOLIBC_TIME_H
+#define _NOLIBC_TIME_H
+
+#include "std.h"
+#include "arch.h"
+#include "types.h"
+#include "sys.h"
+
+static __attribute__((unused))
+time_t time(time_t *tptr)
+{
+       struct timeval tv;
+
+       /* note, cannot fail here */
+       sys_gettimeofday(&tv, NULL);
+
+       if (tptr)
+               *tptr = tv.tv_sec;
+       return tv.tv_sec;
+}
+
+#endif /* _NOLIBC_TIME_H */