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Top Forums Shell Programming and Scripting [ ! -e a.log ] & [ ! -f a.log ] difference b/w these two Post 302269769 by Lakris on Thursday 18th of December 2008 03:29:35 PM
Old 12-18-2008
Hi,
"Everything is a file..."
but not everything is a regular file.
-e return true (and ! reverse the result) if there exist something named a.log
-f return true (and ! reverse the result) if there is something named a.log and is a regular file,such as a text file or a binary, what most people think of as normal files.


Code:
lakris@ubuntu:~$ [ -e /dev/audio ] && echo true
true
lakris@ubuntu:~$ [ -f /dev/audio ] && echo true
lakris@ubuntu:~$

/Lakris

Last edited by Lakris; 12-18-2008 at 04:32 PM.. Reason: clarification
 

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strclean(1M)															      strclean(1M)

NAME
strclean - remove outdated STREAMS error log files SYNOPSIS
logdir] age] DESCRIPTION
cleans the STREAMS error logger directory of log files mm-dd) that contain error messages sent by the STREAMS log driver, strlog(7). If the option is not used to specify another directory, removes error log files in the directory. If the option is not used to specify another age, removes error log files that have not been modified in three days. Options recognizes the following options and command-line arguments: Specifies a directory for the location of the STREAMS error log files to be removed if this is not the default directory Specifies a maximum age in days for the STREAMS error log files if this not the default age of 3. The value of age must be an integer greater than or less than 3. EXAMPLES
Remove day-old error log files from a directory called FILES
One or more error log file or files on which operates. The mm-dd in the filename indicates the month and day of the messages con- tained in the file. NLS catalog for SEE ALSO
strerr(1M), strlog(7). strclean(1M)
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