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Full Discussion: Trap explanation?
Top Forums UNIX for Beginners Questions & Answers Trap explanation? Post 303004494 by Corona688 on Tuesday 3rd of October 2017 11:16:58 AM
Old 10-03-2017
That looks almost char-for-char identical to code I wrote a few months ago. It began when simplifying their code with this:

Code:
exec 2>"${_ERRORFILE}" > "${_LOGFILE}"

They were thrilled they didn't have to do echo ... >> logfile and command 2>>errorlogfile every single time, but they didn't like that _LOGFILE was always created even when no errors occurred. So I added the trap to clean up the log file at exit unless it had greater-than-zero size.
 

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LEARN ABOUT PHP

cachefswssize

cachefswssize(1M)					  System Administration Commands					 cachefswssize(1M)

NAME

       cachefswssize - determine working set size for cachefs

SYNOPSIS

       cachefswssize logfile

DESCRIPTION

       The  cachefswssize  command  displays  the  workspace size determined from logfile. This includes the amount of cache space needed for each
       filesystem that was mounted under the cache, as well as a total.

USAGE

       See largefile(5) for the description of the behavior of cachefswssize when encountering files greater than or equal to 2  Gbyte	(  2 **31
       bytes).

EXAMPLES

       Example 1: A sample output of cachefswssize.

       example% cachefswssize /var/tmp/samlog

       /home/sam
				      end size: 	      10688k
			       high water size: 	      10704k

       /foo
				      end size: 		128k
			       high water size: 		128k

       /usr/dist
				      end size: 	       1472k
			       high water size: 	       1472k

       total for cache
				  initial size: 	     110960k
				      end size: 	      12288k
			       high water size: 	      12304k

EXIT STATUS

       The following exit values are returned:

       0	       success

       non-zero        an error has occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       cachefslog(1M), cachefsstat(1M), cfsadmin(1M), attributes(5), largefile(5)

DIAGNOSTICS

       problems were encountered writing log file

	   There were problems encountered when the kernel was writing the logfile.  The most common problem is running out of disk space.

       invalid log file

	   The logfile is not a valid logfile or was created with a newer version of Solaris than the one where cachefswssize is running.

SunOS 5.10							    16 Sep 1996 						 cachefswssize(1M)
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