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testing if files exist

 
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# 8  
Old 05-01-2008
Quote:
Originally Posted by shalua
I need to check following three things:

a) a file exists but is zero byte
b) a file exists with non-zero bytes
c) a file doesn't exist at all

What switches do we use? Is it -f, -s, -z. Please explain the difference in these!

Many Thanks
Shalua
a) ... [ ! -s ${FILENAME} ]
b) ... [ -s ${FILENAME} ]
c) ... [ ! -f ${FILENAME} ]

Hope that sets you in the right direction.
 
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LEARN ABOUT DEBIAN

cupstestppd

cupstestppd(1)							    Apple Inc.							    cupstestppd(1)

NAME

       cupstestppd - test conformance of ppd files

SYNOPSIS

       cupstestppd [ -I category ] [ -R rootdir ] [ -W category ] [ -q ] [-r] [ -v[v] ] filename.ppd[.gz] [ ... filenameN.ppd[.gz] ]
       cupstestppd [ -R rootdir ] [ -W category ] [ -q ] [-r] [ -v[v] ] -

DESCRIPTION

       cupstestppd  tests  the	conformance of PPD files to the Adobe PostScript Printer Description file format specification version 4.3. It can
       also be used to list the supported options and available fonts in a PPD file. The results of testing and any other output are sent  to  the
       standard output.

       The  first form of cupstestppd tests one or more PPD files on the command-line. The second form tests the PPD file provided on the standard
       input.

OPTIONS

       cupstestppd supports the following options:

       -I filename
	    Ignores all PCFileName warnings.

       -I filters
	    Ignores all filter errors.

       -I profiles
	    Ignores all profile errors.

       -R rootdir
	    Specifies an alternate root directory for the filter, pre-filter, and other support file checks.

       -W constraints
	    Report all UIConstraint errors as warnings.

       -W defaults
	    Except for size-related options, report all default option errors as warnings.

       -W filters
	    Report all filter errors as warnings.

       -W profiles
	    Report all profile errors as warnings.

       -W sizes
	    Report all media size errors as warnings.

       -W translations
	    Report all translation errors as warnings.

       -W all
	    Report all of the previous errors as warnings.

       -W none
	    Report all of the previous errors as errors.

       -q
	    Specifies that no information should be displayed.

       -r
	    Relaxes the PPD conformance requirements so that common whitespace, control character, and formatting problems are not treated as hard
	    errors.

       -v
	    Specifies that detailed conformance testing results should be displayed rather than the concise PASS/FAIL/ERROR status.

       -vv
	    Specifies that all information in the PPD file should be displayed in addition to the detailed conformance testing results.

       The -q, -v, and -vv options are mutually exclusive.

EXIT STATUS

       cupstestppd returns zero on success and non-zero on error. The error codes are as follows:

       1
	    Bad command-line arguments or missing PPD filename.

       2
	    Unable to open or read PPD file.

       3
	    The PPD file contains format errors that cannot be skipped.

       4
	    The PPD file does not conform to the Adobe PPD specification.

EXAMPLES

       The following command will test all PPD files under the current directory and print the names of each file that does not conform:

	   find . -name *.ppd ! -exec cupstestppd -q '{}' ; -print

       The  next  command tests all PPD files under the current directory and print detailed conformance testing results for the files that do not
       conform:

	   find . -name *.ppd ! -exec cupstestppd -q '{}' ; 
	       -exec cupstestppd -v '{}' ;

SEE ALSO

       lpadmin(8),
       http://localhost:631/help
       Adobe PostScript Printer Description File Format Specification, Version 4.3.

COPYRIGHT

       Copyright 2007-2011 by Apple Inc.

19 November 2009						       CUPS							    cupstestppd(1)