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Shell Programming and Scripting
How to read the user inputted file name?
Post 302612455 by rangarasan on Monday 26th of March 2012 01:54:02 AM
03-26-2012
Quote:
hello,
I have prepared a script
------------------------------------------------
#!/bin/sh
cat test.txt| sed '1d' | sed '$d' > /tmp/tmp1.txt
while read line
do
typeset -i count=`echo $line | tr ' ' '}' | wc -c`
finalcount=`expr $count - 1`
echo $finalcount
done < /tmp/tmp1.txt
------------------------------------------------
now, test.txt is hardcoded.....i want to check how can my code consider the file which the user specifies.... in short i want to read the file which will be inputted by the user.
please help
I have prepared a script
------------------------------------------------
#!/bin/sh
cat test.txt| sed '1d' | sed '$d' > /tmp/tmp1.txt
while read line
do
typeset -i count=`echo $line | tr ' ' '}' | wc -c`
finalcount=`expr $count - 1`
echo $finalcount
done < /tmp/tmp1.txt
------------------------------------------------
now, test.txt is hardcoded.....i want to check how can my code consider the file which the user specifies.... in short i want to read the file which will be inputted by the user.
please help
1. command line option
2. read command
First Method:
Consider this script name is 1.sh. you have to call this script,
1.sh test.txt
Code:
#!/bin/sh cat $1| sed '1d' | sed '$d' > /tmp/tmp1.txt while read line do typeset -i count=`echo $line | tr ' ' '}' | wc -c` finalcount=`expr $count - 1` echo $finalcount done < /tmp/tmp1.txt
Consider this script name is 1.sh. you have to call this script,
1.sh
Code:
#!/bin/sh echo "Enter the file name:" read filename cat $filename | sed '1d' | sed '$d' > /tmp/tmp1.txt while read line do typeset -i count=`echo $line | tr ' ' '}' | wc -c` finalcount=`expr $count - 1` echo $finalcount done < /tmp/tmp1.txt
Cheers,
Ranga
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LEARN ABOUT OPENDARWIN
gzexe
GZEXE(1) General Commands Manual GZEXE(1) NAME
gzexe - compress executable files in place SYNOPSIS
gzexe [ name ... ] DESCRIPTION
The gzexe 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 ``gzexe /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
gzip(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
gzexe 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. GZEXE(1)