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cat problem

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Top Forums Shell Programming and Scripting cat problem
# 8  
Old 03-01-2007
Quote:
Originally Posted by gopidesaboyina
This /usr/sbin/for has this problem. You can fix this using /usr/xpg4/bin/for or

while read line < cat filename
do
echo $line
done

this would print entire line. but if you use for it would print all words with new lines.
First of all, there should be no "cat".

Second, that will strip leading and trailing spaces.

Third, it will repeatedly read the first line of the file in an endless loop.

Fourth, you should quote the variable, "$line", or leading and trailing whitespace will be stripped, and multiple whitespace characters will be reduced to a single space.

Code:
while IFS= read -r line
do
 echo "$line"
done  < filename
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LEARN ABOUT DEBIAN

bzexe

BZEXE(1)						      General Commands Manual							  BZEXE(1)

NAME

       bzexe - compress executable files in place

SYNOPSIS

       bzexe [ name ...  ]

DESCRIPTION

       The  bzexe  utility  allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a
       penalty in performance).  For example if you execute ``bzexe /bin/cat'' it will create the following two files:
	   -r-xr-xr-x  1 root  bin   9644 Feb 11 11:16 /bin/cat
	   -r-xr-xr-x  1 bin   bin  24576 Nov 23 13:21 /bin/cat~
       /bin/cat~ is the original file and /bin/cat is the self-uncompressing executable file.  You can remove /bin/cat~ once  you  are	sure  that
       /bin/cat works properly.

       This utility is most useful on systems with very small disks.

OPTIONS

       -d     Decompress the given executables instead of compressing them.

SEE ALSO

       bzip2(1), znew(1), zmore(1), zcmp(1), zforce(1)

CAVEATS

       The  compressed	executable  is a shell script. This may create some security holes. In particular, the compressed executable relies on the
       PATH environment variable to find gzip and some other utilities (tail, chmod, ln, sleep).

BUGS

       bzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually  in  some  cases,
       using chmod or chown.

																	  BZEXE(1)