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Full Discussion: Regex negative look and bash script
Top Forums Shell Programming and Scripting Regex negative look and bash script Post 302996627 by Corona688 on Friday 28th of April 2017 11:17:42 AM
Old 04-28-2017
Quote:
Originally Posted by MadeInGermany
No, you cannot do that in bash. If you want to ensure that success is only searched at the end then you have to repeat the pattern.
Code:
pat="INF - Status"
tail -f regex.log |
while read LOGLINE
do
  if [[ $LOGLINE =~ $pat ]] && [[ ! $LOGLINE =~ $pat.*success ]]
  then

BTW a break does not terminate the tail -f in most shells. In Solaris only the old /bin/sh works like this.
Why not? Does it hang instead?
 

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LEARN ABOUT OPENSOLARIS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
       /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
       /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.

       Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).

FILES

       /etc/shells    list of shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.11							    20 Nov 2007 							 shells(4)
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