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Full Discussion: pwd: A specified flag is not valid for this command.
Top Forums UNIX for Dummies Questions & Answers pwd: A specified flag is not valid for this command. Post 39756 by Perderabo on Friday 29th of August 2003 12:56:45 PM
Old 08-29-2003
Actually I kinda think that I have seen a -H option to pwd, but I'm not completely sure and I can't find any evidence of it. Still, my feeling is that -H meant hard and there was a -S which meant soft or symbolic, with -S being the default. If this is right, the -H would now be -P or a Posix compliant system. For pwd to be able to distingish between a physical and a logical path it must be a shell built-in. So the -H would be specific to some shell that I came across sometime after symbolic links were invented and before Posix standardized the pwd options.

And there is another possibility... circa 1980, pwd was not built-in to the shell. The shell had to invoke a separate program to run pwd. That program ignored its arguments. The SunOs /usr/bin/pwd seems to still behave like that. If this is very old script, the -H could be an error that seemed to work when the script ran with an older shell.

In any event, the change being made to the script is possibly triggering the execution of that pwd line. And prior to the change, the script didn't happen to reach that path.
 

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LEARN ABOUT CENTOS

bf_tar

BF_TAR(1)						    Bogofilter Reference Manual 						 BF_TAR(1)

NAME

       bf_tar - shell script to write a tar file of a bogofilter directory to stdout

SYNOPSIS

       bf_tar [-r] [-R] bogofilter_directory

DESCRIPTION

       bf_tar bundles a bogofilter working directory in tar format and copies it to standard output (your console, or where you redirect it, see
       EXAMPLES below).

OPTIONS

       The -r option causes bf_tar to remove inactive log files after the archive has been written successfully. The default is to leave log
       files.

       The -R option causes bf_tar to remove inactive log files before the archive is written. This may reduce chances that the resulting archive
       is recoverable should it become damaged. The archive may be smaller though. The default is to leave log files.

EXIT STATUS

       The script exits with status code 0 if everything went well, and nonzero if it encountered trouble.

EXAMPLES

       o   bf_tar ~/.bogofilter > outfile.tar

	   Writes a standard .tar file containing the essential files from ~/.bogofilter to outfile.tar.

       o   bf_tar ~/.bogofilter | gzip -9 -c > outfile.tar.gz

	   Writes a gzipped .tar.gz file containing the essential files from ~/.bogofilter to outfile.tar.gz.

       o   bf_tar `pwd`/mydirectory > outfile.tar

	   Prepend $(pwd)/ or `pwd`/ if you want to specify an absolute path instead of a relative path.

NOTES

       This script is meant for use with Berkeley DB based bogofilter versions.

       This script requires a SUSv2 compliant pax utility.

       This script expects a SUSv2 compliant shell. Solaris systems should have the SUNWxcu4 package installed (when bogofilter is configured) so
       that /usr/xpg4/bin/sh can be used.

AUTHORS

       Matthias Andree

Bogofilter							    10/22/2012								 BF_TAR(1)
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