I also need some quoting help. I tracked my problem down in a simple example.
I have a grep that is working if typed at the shell prompt (it is important for me to have a space in the character class):
Code:
grep -E '[a-zA-Z ]{30}:' myFile
But included in a script file (lets say file 'runMe') like the following:
Code:
#!/bin/ksh
typeset pattern='[a-zA-Z ]{30}:'
echo "Command to be executed: grep -E $pattern myFile"
grep -E $pattern myFile
Executing the file 'runMe', I get the following error: grep: RE error in '[a-zA-Z [ ] imbalance or syntax error
I googled/searched here for the error and for quoting or inserting something else which recognizes a space character, but with no success yet.
Also I tried various quotings in runMe, like "'[a-zA-Z ]{30}:'" or "\"[a-zA-Z ]{30}:\"" or quoting the space character like "[a-zA-Z ]{30}:" but all lead to the same error message. Seems like it is breaking at the space?
Curious for me:
If I execute the script and copy the line which is printed by the 'echo' statement and paste this line at the command prompt, that works! It just doesn't work within the script...
Maybe this not the adequate topic, because its more a grep issue than a quoting issue. If so, please be patient with me
FYI:
I'm relatively new to unix.
In 'myFile', I want to (simplified for this issue) match lines, that have the first 30 characters being (a letter or a space), followed by a colon.
I've aliased grep to /usr/xpg4/bin/grep (and also tried /usr/xpg4/bin/grep manually without alias).
thanks in advance for any hints, Thinkpositiv
Last edited by Thinkpositiv; 04-29-2008 at 11:32 AM..
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Discussion started by: AMG1978
2 Replies
LEARN ABOUT MINIX
zgrep
ZGREP(1) General Commands Manual ZGREP(1)NAME
zgrep - search possibly compressed files for a regular expression
SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename...
DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code:
(-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the
standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep.
If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.
EXIT CODE
2 - An option that is not supported was specified.
AUTHOR
Charles Levert (charles@comm.polymtl.ca)
SEE ALSO grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)ZGREP(1)
04-29-2008
