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Full Discussion: getting the path part of an argument
Top Forums Shell Programming and Scripting getting the path part of an argument Post 48946 by ropers on Monday 22nd of March 2004 11:38:17 AM
Old 03-22-2004
getting the path part of an argument
Seems I'm inundating this forum with questions, but anyway:

I am writing a script that should accept one and only one argument when called.

That argument should designate a file, either with path/filename or just filename.

Now to the difficult bit:

I want to figure out a way to store just the path in one variable and just the file name in another. I need this for subsequent manipulation.

I thought I should be able to do this with sed or awk, but I couldn't figure it out.
Also, I am fundamentally unsure whether it's a good idea to just look for the last "/" in the argument.

So I'm going to ask the one question I am starting to get famous for: is there a better way to achieve what I want?

The below code is what I currently have, giving you the context this is for, not tremendously important, but just so you can see where I'm going:
Code:
if [ $# -eq 1 ] && [ -r "$1" ] && [ -f "$1" ] && [ `wc -c "$1" | awk '{print $1}'` -gt 681574400 ]; then 
# I should add a check whether the current dir is writable 
	# there is only one parameter AND it\'s writable AND it\'s an ordinary file AND it\'s bigger than 650MB
	split -b650m "$1" "$1"'.carved.'
	#echo "last error:"
	#echo $?
	# check how split reacts when given a file smaller than 650MB
	
	slices=( $(ls . | grep "$1.carved." | grep -v "rejoin.$1") )
		
	# echo "Number of slices:"
	slice_count=${#slices[@]}
	# echo $slice_count
	
	echo "#!/bin/sh" > "rejoin.$1"
	index=1
	while [ "$index" -lt "$slice_count" ]; do
		echo "cat ${slices[$index]} >> ${slices[0]}" >> "rejoin.$1"
		let "index = $index + 1"
	done
	echo "mv ${slices[0]} \"$1\"" >> "rejoin.$1"
	echo "exit" >> "rejoin.$1"
	chmod 755 "rejoin.$1"
	echo "Generated rejoin script."

	exit 0;
else
	echo "carve - carves up a (large) file into 650MB pieces";
	echo
	echo "usage: carve <filename>";
	echo 
	echo "carve also generates a \"rejoin\" script for future reassembly"; 
	# That's because I want the user to have no excuse for not including a 
	# surefire rejoin script when putting these files somewhere.
	# We don't want some other user end up with a bunch of confusing files
	# s/he doesn't know how to deal with.
	# This "included" generation out of this script is also to minimize 
	# dependencies.
	exit 1
fi

 

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LEARN ABOUT DEBIAN

java2html

JAVA2HTML(1)						      General Commands Manual						      JAVA2HTML(1)

NAME

       java2html - generates highlighted html-files from Java or C++ source

SYNOPSIS

       java2html [options] [filename...]

DESCRIPTION

       This  manual  page  documents  how  to  use java2html.  If no arguments are given on the command line of java2html, it reads from stdin and
       writes to stdout.

       If invoked with filenames as arguments java2html will write it's output into new files. Names of output files  are  generated by  appending
       ".html" to the corresponding input filename.

   Installing as a CGI program
       java2html  can  be  installed as a CGI program and convert source files on the fly. In order to set this up for apache the webmaster has to
       add the two lines

	       AddType text/x-java .java
	       Action text/x-java /cgi-bin/java2html

       to the webserver configuration file.  java2html depends on the webserver properly setting environment variable PATH_TRANSLATED to the path-
       name  of  the  source  file.  If java2html has been compiled with option -DCOMPRESSION=1 then it will invoke gzip to compress the generated
       HTML before sending it to the requesting browser. Of course java2html takes care to check if the browser accepts gzip encoding.

   OPTIONS
       --     Interpret all following arguments on the command line as filenames.  This is useful, if you want to convert files beginning  with  a
	      '-'.

       -b filename
	      Insert the file 'filename' after converted data and before HTML footer. See also the -s option.

       -c     Turns off CGI-script detection and HTTP header generation.  This is needed to use java2html as a subcommand in another CGI script.

       -h filename
	      Insert the file 'filename' after the HTML headers and before the converted data. See also the -s option.

       -i     Generate	an index only. This will generate a list of references (HREF's) to the labels that java2html creates for your source file.
	      The references are created as list items (<li>) in an HTML list. Each line has the form
	      <li><a href="#name">prototype()</a></li>
	      so they can be used directly as an index list, or further parsed by another script.
	      If you want the index at the top of the source file, you will need a wrapper script like this one:

		#! /bin/sh
		echo "Content-type: text/html"
		echo ""
		echo "<html>"
		echo "<head><title>$PATH_TRANSLATED</title>"
		echo "<meta name="generator""
		echo "content="`java2html -V`">"
		echo "</head>"
		echo "<body>"
		echo "<h1>Source of $PATH_TRANSLATED</h1>"
		echo "<ul>Structures and functions"
		cat $PATH_TRANSLATED | java2html -isc
		echo "</ul>"
		echo "<hr></hr>"
		cat $PATH_TRANSLATED | java2html -sc
		echo "</body></html>"
		exit

       -n     Number lines and label them with 'line' followed by the line number. Empty lines get no label, but the linecounter will  count  them
	      nevertheless. With this feature you can refer to special lines of code from other parts of the generated file or from external files
	      with a line like this:

	      <A HREF="foo.java.html#line301">Go to line 301</A>

       -s     With this option you can suppress the generation of HTML headers.  This is especially useful together with options -b  file  and	-h
	      file.

       -t title
	      Set the title to 'title'. The default is the filename you converted or "stdin" if reading from stdin. This option is only used if -s
	      is not set.

       -u     Print usage information.

       -w width
	      sets the WIDTH attribute for HTML tag <PRE>. If this option is not used a default of 80 is assumed.  (Currently  most  browsers  are
	      ignoring this attribute).

       -V     reports the version number of java2html.

EXIT STATUS

       java2html returns 0 on success, 1 if input files are not existing/readable, 2 if output files are not creatable/writable, 3 if invoked with
       illegal options and 4 if gzip cannot be invoked.

AUTHORS

       Florian Schintke <schintke@cs.tu-berlin.de>
       Martin Kammerhofer <mkamm@gmx.net> wrote the CGI feature.
       Rob Ewan <rob@ewan.com> wrote the indexing feature.

SEE ALSO

       c2html(1), pas2html(1), perl2html(1).

																      JAVA2HTML(1)
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