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From: Adhemerval Zanella <azanella@sourceware.org>
To: glibc-cvs@sourceware.org
Subject: [glibc/azanella/y2038] Move ftime to a compatibility symbol
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X-Git-Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Date: Thu, 30 Jul 2020 13:27:49 +0000 (GMT)
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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=9b950ec0cc1b6f496c5389217422540cc114f850

commit 9b950ec0cc1b6f496c5389217422540cc114f850
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Fri Jul 24 13:42:01 2020 -0300

    Move ftime to a compatibility symbol
    
    It was made deprecated on 2.31, so it moves to compat symbol after
    two releases.
    
    Checked on x86_64-linux-gnu and i686-linux-gnu.

Diff:
---
 include/sys/timeb.h |  1 -
 time/Makefile       |  5 +++--
 time/ftime.c        | 19 +++++++++++++++--
 time/sys/timeb.h    | 44 ---------------------------------------
 time/tst-ftime.c    | 59 +++++++++++++++++++++++++++--------------------------
 5 files changed, 50 insertions(+), 78 deletions(-)

diff --git a/include/sys/timeb.h b/include/sys/timeb.h
deleted file mode 100644
index 9f4509c35e..0000000000
--- a/include/sys/timeb.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <time/sys/timeb.h>
diff --git a/time/Makefile b/time/Makefile
index a4fb13d6a3..ab8fb3303b 100644
--- a/time/Makefile
+++ b/time/Makefile
@@ -22,7 +22,7 @@ subdir	:= time
 
 include ../Makeconfig
 
-headers := time.h sys/time.h sys/timeb.h bits/time.h			\
+headers := time.h sys/time.h bits/time.h				\
 	   bits/types/clockid_t.h bits/types/clock_t.h			\
 	   bits/types/struct_itimerspec.h				\
 	   bits/types/struct_timespec.h bits/types/struct_timeval.h	\
@@ -45,9 +45,10 @@ aux :=	    era alt_digit lc-time-cleanup
 tests	:= test_time clocktest tst-posixtz tst-strptime tst_wcsftime \
 	   tst-getdate tst-mktime tst-mktime2 tst-ftime_l tst-strftime \
 	   tst-mktime3 tst-strptime2 bug-asctime bug-asctime_r bug-mktime1 \
-	   tst-strptime3 bug-getdate1 tst-strptime-whitespace tst-ftime \
+	   tst-strptime3 bug-getdate1 tst-strptime-whitespace \
 	   tst-tzname tst-y2039 bug-mktime4 tst-strftime2 tst-strftime3 \
 	   tst-clock tst-clock2 tst-clock_nanosleep tst-cpuclock1
+tests-internal := tst-ftime
 
 include ../Rules
 
diff --git a/time/ftime.c b/time/ftime.c
index 93f485bbf7..be3295ef76 100644
--- a/time/ftime.c
+++ b/time/ftime.c
@@ -16,11 +16,23 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <sys/timeb.h>
+#include <shlib-compat.h>
+
+#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_33)
+
 #include <time.h>
 
+struct timeb
+  {
+    time_t time;		/* Seconds since epoch, as from `time'.  */
+    unsigned short int millitm;	/* Additional milliseconds.  */
+    short int timezone;		/* Minutes west of GMT.  */
+    short int dstflag;		/* Nonzero if Daylight Savings Time used.  */
+  };
+
 int
-ftime (struct timeb *timebuf)
+attribute_compat_text_section
+__ftime (struct timeb *timebuf)
 {
   struct timespec ts;
   __clock_gettime (CLOCK_REALTIME, &ts);
@@ -31,3 +43,6 @@ ftime (struct timeb *timebuf)
   timebuf->dstflag = 0;
   return 0;
 }
+
+compat_symbol (libc, __ftime, ftime, GLIBC_2_0);
+#endif
diff --git a/time/sys/timeb.h b/time/sys/timeb.h
deleted file mode 100644
index 641c333450..0000000000
--- a/time/sys/timeb.h
+++ /dev/null
@@ -1,44 +0,0 @@
-/* Copyright (C) 1994-2020 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#ifndef _SYS_TIMEB_H
-#define _SYS_TIMEB_H	1
-
-#include <features.h>
-
-#include <bits/types/time_t.h>
-
-__BEGIN_DECLS
-
-/* Structure returned by the `ftime' function.  */
-
-struct timeb
-  {
-    time_t time;		/* Seconds since epoch, as from `time'.  */
-    unsigned short int millitm;	/* Additional milliseconds.  */
-    short int timezone;		/* Minutes west of GMT.  */
-    short int dstflag;		/* Nonzero if Daylight Savings Time used.  */
-  };
-
-/* Fill in TIMEBUF with information about the current time.  */
-
-extern int ftime (struct timeb *__timebuf)
-  __nonnull ((1)) __attribute_deprecated__;
-
-__END_DECLS
-
-#endif	/* sys/timeb.h */
diff --git a/time/tst-ftime.c b/time/tst-ftime.c
index 08916c0c65..6978feb0f1 100644
--- a/time/tst-ftime.c
+++ b/time/tst-ftime.c
@@ -16,9 +16,23 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <sys/timeb.h>
-#include <stdio.h>
-#include <libc-diag.h>
+
+#include <shlib-compat.h>
+#if TEST_COMPAT (libc, GLIBC_2_0, GLIBC_2_33)
+#include <time.h>
+#include <support/check.h>
+
+compat_symbol_reference (libc, ftime, ftime, GLIBC_2_0);
+
+struct timeb
+  {
+    time_t time;
+    unsigned short int millitm;
+    short int timezone;
+    short int dstflag;
+  };
+
+extern int ftime (struct timeb *__timebuf);
 
 static int
 do_test (void)
@@ -30,36 +44,23 @@ do_test (void)
     {
       prev = curr;
 
-      /* ftime was deprecated on 2.31.  */
-      DIAG_PUSH_NEEDS_COMMENT;
-      DIAG_IGNORE_NEEDS_COMMENT (4.9, "-Wdeprecated-declarations");
-
-      if (ftime (&curr))
-        {
-          printf ("ftime returned an error\n");
-          return 1;
-        }
-
-      DIAG_POP_NEEDS_COMMENT;
-
-      if (curr.time < prev.time)
-        {
-          printf ("ftime's time flowed backwards\n");
-          return 1;
-        }
-
-      if (curr.time == prev.time
-          && curr.millitm < prev.millitm)
-        {
-          printf ("ftime's millitm flowed backwards\n");
-          return 1;
-        }
+      /* ftime was deprecated on 2.31 and removed on 2.33.  */
+      TEST_COMPARE (ftime (&curr), 0);
+      TEST_VERIFY_EXIT (curr.time >= prev.time);
+      if (curr.time == prev.time)
+	TEST_VERIFY_EXIT (curr.millitm >= prev.millitm);
 
       if (curr.time > prev.time)
         sec ++;
     }
   return 0;
 }
+#else
+static int
+do_test (void)
+{
+  return EXIT_UNSUPPORTED;
+}
+#endif
 
-#define TEST_FUNCTION do_test ()
-#include "../test-skeleton.c"
+#include <support/test-driver.c>