From: Eric Blake <eblake@redhat.com>
Date: Mon, 11 Oct 2010 19:54:45 +0000 (-0600)
Subject: futimens: work around Solaris 11 bug
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9dc2cd782cd1d20ace076d838b46f89325005574;p=pspp

futimens: work around Solaris 11 bug

Revert "test-futimens: avoid unwarranted test failure on Solaris 5.11"
This reverts commit 0afab138f4aedb7eaab70957c164aa0e5eb01fce.

* m4/futimens.m4 (gl_FUNC_FUTIMENS): Detect the bug.
* tests/test-futimens.h (test_futimens): Enhance, rather than
weaken test.
* doc/posix-functions/futimens.texi (futimens): Document the bug.

Signed-off-by: Eric Blake <eblake@redhat.com>
---

diff --git a/ChangeLog b/ChangeLog
index 60c0d76b58..5a68d064f5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2010-10-11  Eric Blake  <eblake@redhat.com>
+
+	futimens: work around Solaris 11 bug
+	* m4/futimens.m4 (gl_FUNC_FUTIMENS): Detect the bug.
+	* tests/test-futimens.h (test_futimens): Enhance, rather than
+	weaken test.
+	* doc/posix-functions/futimens.texi (futimens): Document the bug.
+
 2010-10-11  Paul Eggert  <eggert@cs.ucla.edu>
 
 	Indentation.
diff --git a/doc/posix-functions/futimens.texi b/doc/posix-functions/futimens.texi
index be4698ab96..7c35b8b68d 100644
--- a/doc/posix-functions/futimens.texi
+++ b/doc/posix-functions/futimens.texi
@@ -28,6 +28,10 @@ Linux kernel 2.6.25.
 When using @code{UTIME_OMIT} for the modification time, but specifying
 an access time, some systems fail to update the change time:
 Linux kernel 2.6.32.
+@itme
+Passing @code{AT_FDCWD} as the fd argument does not properly fail with
+@code{EBADF} on some systems:
+glibc 2.11, Solaris 11.
 @end itemize
 
 Portability problems not fixed by Gnulib:
diff --git a/m4/futimens.m4 b/m4/futimens.m4
index 255010cbdd..1212fb904e 100644
--- a/m4/futimens.m4
+++ b/m4/futimens.m4
@@ -1,4 +1,4 @@
-# serial 4
+# serial 5
 # See if we need to provide futimens replacement.
 
 dnl Copyright (C) 2009, 2010 Free Software Foundation, Inc.
@@ -23,18 +23,21 @@ AC_DEFUN([gl_FUNC_FUTIMENS],
 #include <fcntl.h>
 #include <sys/stat.h>
 #include <unistd.h>
+#include <errno.h>
 ]], [[struct timespec ts[2] = { { 1, UTIME_OMIT }, { 1, UTIME_NOW } };
       int fd = creat ("conftest.file", 0600);
       struct stat st;
       if (fd < 0) return 1;
+      errno = 0;
       if (futimens (AT_FDCWD, NULL) == 0) return 2;
-      if (futimens (fd, ts)) return 3;
+      if (errno != EBADF) return 3;
+      if (futimens (fd, ts)) return 4;
       sleep (1);
       ts[0].tv_nsec = UTIME_NOW;
       ts[1].tv_nsec = UTIME_OMIT;
-      if (futimens (fd, ts)) return 4;
-      if (fstat (fd, &st)) return 5;
-      if (st.st_ctime < st.st_atime) return 6;
+      if (futimens (fd, ts)) return 5;
+      if (fstat (fd, &st)) return 6;
+      if (st.st_ctime < st.st_atime) return 7;
       ]])],
 dnl FIXME: simplify this in 2012, when file system bugs are no longer common
          [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
diff --git a/tests/test-futimens.h b/tests/test-futimens.h
index a0312b7f88..3a6d1da4c7 100644
--- a/tests/test-futimens.h
+++ b/tests/test-futimens.h
@@ -75,6 +75,9 @@ test_futimens (int (*func) (int, struct timespec const *),
 
   /* Invalid arguments.  */
   errno = 0;
+  ASSERT (func (AT_FDCWD, NULL) == -1);
+  ASSERT (errno == EBADF);
+  errno = 0;
   ASSERT (func (-1, NULL) == -1);
   ASSERT (errno == EBADF);
   {