time,times: stop interpreting negative return values ar errors

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

libc/sysdeps/linux/common/bits/syscalls-common.h

@@ -33,6 +33,9 @@
 #ifndef INLINE_SYSCALL
 # define INLINE_SYSCALL(name, nr, args...) INLINE_SYSCALL_NCS(__NR_##name, nr, args)
 #endif
+#ifndef INLINE_SYSCALL_NOERR
+# define INLINE_SYSCALL_NOERR(name, nr, args...) INLINE_SYSCALL_NOERR_NCS(__NR_##name, nr, args)
+#endif
 
 /* Just like INLINE_SYSCALL(), but take a non-constant syscall (NCS) argument */
 #ifndef INLINE_SYSCALL_NCS
@@ -47,6 +50,14 @@
 	__res;								\
 })
 #endif
+#ifndef INLINE_SYSCALL_NOERR_NCS
+# define INLINE_SYSCALL_NOERR_NCS(name, nr, args...)			\
+({									\
+	INTERNAL_SYSCALL_DECL(__err);					\
+	long __res = INTERNAL_SYSCALL_NCS(name, __err, nr, args);	\
+	__res;								\
+})
+#endif
 
 /* No point in forcing people to implement both when they only need one */
 #ifndef INTERNAL_SYSCALL
@@ -80,8 +91,14 @@ type name(C_DECL_ARGS_##nargs(args)) {					\
 	return (type)INLINE_SYSCALL(name, nargs, C_ARGS_##nargs(args));	\
 }
 
+#define SYSCALL_NOERR_FUNC(nargs, type, name, args...)			\
+type name(C_DECL_ARGS_##nargs(args)) {					\
+	return (type)INLINE_SYSCALL_NOERR(name, nargs, C_ARGS_##nargs(args));	\
+}
+
 #define _syscall0(args...)		SYSCALL_FUNC(0, args)
 #define _syscall1(args...)		SYSCALL_FUNC(1, args)
+#define _syscall_noerr1(args...)	SYSCALL_NOERR_FUNC(1, args)
 #define _syscall2(args...)		SYSCALL_FUNC(2, args)
 #define _syscall3(args...)		SYSCALL_FUNC(3, args)
 #define _syscall4(args...)		SYSCALL_FUNC(4, args)

libc/sysdeps/linux/common/time.c

@@ -13,19 +13,18 @@
 
 
 #ifdef __NR_time
-_syscall1(time_t, time, time_t *, t)
+_syscall_noerr1(time_t, time, time_t *, t)
 #else
-
 time_t time(time_t * t)
 {
 	time_t result;
 	struct timeval tv;
 
-	if (gettimeofday(&tv, (struct timezone *) NULL)) {
-		result = (time_t) - 1;
-	} else {
-		result = (time_t) tv.tv_sec;
-	}
+	/* In Linux, gettimeofday fails only on bad parameter.
+	 * We know that here parameter isn't bad.
+	 */
+	gettimeofday(&tv, NULL);
+	result = (time_t) tv.tv_sec;
 	if (t != NULL) {
 		*t = result;
 	}

libc/sysdeps/linux/common/times.c

@@ -11,5 +11,5 @@
 #include <sys/times.h>
 
 
-_syscall1(clock_t, times, struct tms *, buf)
+_syscall_noerr1(clock_t, times, struct tms *, buf)
 libc_hidden_def(times)