[cmake-developers] [CMake 0014020]: cmake -E touch truncates time to seconds

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
====================================================================== 
http://cmake.org/Bug/view.php?id=14020 
====================================================================== 
Reported By:                Modestas Vainius
Assigned To:                
====================================================================== 
Project:                    CMake
Issue ID:                   14020
Category:                   CMake
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
====================================================================== 
Date Submitted:             2013-03-16 14:48 EDT
Last Modified:              2013-03-16 14:48 EDT
====================================================================== 
Summary:                    cmake -E touch truncates time to seconds
Description: 
When using "cmake -E touch" on an existing file, the modification time
is truncated at the precision of a second.  This can be seen e.g. on an
ext4 filesystem.



Steps to Reproduce: 
How to reproduce (file1 is used with "touch", and file2 is used with
"cmake -E touch"):

# In an empty directory...
$ ls -l
total 0

# Create the two files: file1 and file2
$ touch file1 ; cmake -E touch file2 ; ls -l --full-time  
-rw-r----- 1 xxxx xxxx 0 2013-02-03 02:00:57.827669619 +0100 file1
-rw-r----- 1 xxxx xxxx 0 2013-02-03 02:00:57.831669779 +0100 file2

# Note that the times look good here (file1 < file2)

# Touch the two files again
$ touch file1 ; cmake -E touch file2 ; ls -l --full-time  
-rw-r----- 1 xxxx xxxx 0 2013-02-03 02:01:01.595819478 +0100 file1
-rw-r----- 1 xxxx xxxx 0 2013-02-03 02:01:01.000000000 +0100 file2


Now, the modification time of file2 is *before* that of file1, but file2
was touched *after* file1.


Additional Information: 
Relayed from Debian bug report at
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=699657

What is more, I have easily reproduced it with 2.8.11-rc1.
====================================================================== 

Issue History 
Date Modified    Username       Field                    Change               
====================================================================== 
2013-03-16 14:48 Modestas VainiusNew Issue                                    
======================================================================