01-18-2006
HELP! problems with using 'cat' in 'while read line'
Hi,
I'm having some trouble reading a file that was 'cat' through a while loop. Can anyone suggest alternatives? what i do is
cat filename|grep [23]*.stuff
while read line
do
echo $line
... and other commands
done
The cat,grep line seems to work correctly, but the script hangs when i add in the while loop. echo line deosn't seem to work either.
I've been fiddling around, and sometimes I get a messagefor 'a broken pipe' and a syntax error, unexpected token near done? Help please! Been trying for hours. Thanks!
Last edited by chugger06; 01-18-2006 at 12:59 PM..
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Here's what the shell (korn) script is doing:
1. Prompt for input
2. Read a file using the cat and the while read command.
3. Get a field on the record and hold that value in a variable.
4. Within the process, I then need to prompt the user again to ask them if they are sure they want to make... (3 Replies)
Discussion started by: mango
3 Replies
2. Shell Programming and Scripting
I am writing a script that is running a loop on one file to obtain records from another file.
Using egrep, I am finding matching records in file b, then outputing feilds of both into another file.
****************************
filea=this.txt
fileb=that.txt
cat $filea | while read line
do... (1 Reply)
Discussion started by: djsal
1 Replies
3. Shell Programming and Scripting
STEP 1
# Set variable
FILE=/tmp/mainfile
SEARCHFILE =/tmp/searchfile
# THIS IS THE MAIN FILE.
cat /tmp/mainfile
Interface Ethernet0/0 "outside", is up, line protocol is up
Hardware is i82546GB rev03, BW 100 Mbps
Full-Duplex(Full-duplex), 100 Mbps(100 Mbps)
MAC address... (6 Replies)
Discussion started by: irongeekio
6 Replies
4. Shell Programming and Scripting
Hello,
So I sorted my file as I was supposed to:
sort -n -r -k 2 -k 1 file1 | uniq > file2
and when I wrote
> cat file2
in the command line, I got what I was expecting, but in the script itself
...
sort -n -r -k 2 -k 1 averages | uniq > temp
cat file2
It wrote a whole... (21 Replies)
Discussion started by: shira
21 Replies
5. Shell Programming and Scripting
What is wrong with my menu script? Do I need to continue with the read statements? All I want to do with option 4 is to cat some /var/log/files and awk out a few lines? How do I do that please?
$ cat menu.sh ... (11 Replies)
Discussion started by: taekwondo
11 Replies
6. Shell Programming and Scripting
Hi Everyone,
I have a file: a.txt
a,b,c,d,6,6,6
1,2,3,d,6,6,6
4,5,6,6,6,6,6
#!/usr/bin/perl
use warnings;
use strict;
my @array = ();
### Load file into array
for my $i (split '\n', `cat /tmp/a.txt`) {
push @array, ;
}
It works. But my a.txt have 1million lines, and... (2 Replies)
Discussion started by: jimmy_y
2 Replies
7. Shell Programming and Scripting
I am using the while-loop to read a file.
The file has lines with null-terminated strings (words, actually.)
What I have by that reading - just a first word up to '\0'!
I need to have whole string up to 'new line' - (LF, 10#10, 16#A)
What I am doing wrong?
#make file 'grb' with... (6 Replies)
Discussion started by: alex_5161
6 Replies
8. Shell Programming and Scripting
Hi.
I'm just wondering how can I read variable text files through cat command.
I made a shell script to count frequency of words and array them with variable conditions. It's only working for one file that I wrote in script now. But I want to make it working for every text file when I execute... (2 Replies)
Discussion started by: rlaxodus
2 Replies
9. Shell Programming and Scripting
Hello,
I need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line... An example of entries in the file would be:
SRVXPAPI001 ERRO JUN24 07:28:34 1775
REASON= 0000, PROCID= #E506 #1065: TPCIPPR, INDEX= 003F
... (8 Replies)
Discussion started by: Ferocci
8 Replies
10. Solaris
I am trying to read some data form .key file with cat command..but its not displaying data correctly..tried with other commands also still no use.i tried with CAT with SED combination but no use..
Please help me with the command or script. (10 Replies)
Discussion started by: kish_rock
10 Replies
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)