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Top Forums UNIX for Advanced & Expert Users What is the cause of file truncation? Post 85175 by venkatmyname on Monday 3rd of October 2005 08:21:12 AM
Old 10-03-2005
What is the cause of file truncation?

Hi,

I have a program that gets called from the front end of my application. Actually it creates some temporary files and uses them and deletes them at last. But sometimes, say once in 6 times, some of these temporary files are getting truncated in the middle and because of this my program is behaving irregularly. My application runs on AIX.

I am not sure -
1) whether some other process is truncating the files, or
2) My program itself is writing the files incompletely.

If I restart the same operation again, I am able to proceede correctly. This kind of trucation of files is happening only some times, say once in 6 times.

I want to monitor these temporary files from creation to the deletion - like what processes are writing to them, using them, truncating them etc.

Can you please tell me, is there a way to do this task? Or, any other better way of solving this problem is possible?

Thanks,
Venkat.
 

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SYSTEMD-TMPFILES(8)						 systemd-tmpfiles					       SYSTEMD-TMPFILES(8)

NAME
systemd-tmpfiles - Creates, deletes and cleans up volatile and temporary files and directories. SYNOPSIS
systemd-tmpfiles [OPTIONS...] [CONFIGURATION FILE...] DESCRIPTION
systemd-tmpfiles creates, deletes and cleans up volatile and temporary files and directories, based on the configuration from /etc/tmpfiles.d/. See tmpfiles.d(5) for more details on these files. If invoked with no arguments applies all directives from all configuration files in /etc/tmpfiles.d/*.conf. If one or more absolute file names are passed on the command line only the directives in these files are applied. OPTIONS
The following options are understood: --create If this option is passed all files and directories marked with f, F, d, D in the configuration files are created. Files and directories marked with z, Z have their ownership, access mode and security labels set. --clean If this option is passed all files and directories with an age parameter configured will be cleaned up. --remove If this option is passed all files and directories marked with r, R in the configuration files are removed. --prefix=PATH Only apply rules that apply to paths with the specified prefix. --help Prints a short help text and exits. It is possible to combine --create, --clean, and --remove in one invocation. For example, during boot the following command line is executed to ensure that all temporary and volatile directories are removed and created according to the configuration file: systemd-tmpfiles --remove --create EXIT STATUS
On success 0 is returned, a non-zero failure code otherwise. SEE ALSO
systemd(1), tmpfiles.d(5), tmpwatch(8) AUTHOR
Lennart Poettering <lennart@poettering.net> Developer systemd 10/07/2013 SYSTEMD-TMPFILES(8)
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