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Full Discussion: Need some help modifying script
Top Forums Shell Programming and Scripting Need some help modifying script Post 302633799 by jjj0923 on Wednesday 2nd of May 2012 12:38:06 PM
Old 05-02-2012
Need some help modifying script
I have a script that currently runs fine and I need to add or || (or) condition to the if statement and I'm not sure the exact syntax as it relates to the use of brackets.

my current script starts like this:

Code:
errLog="/usr/local/website-logs/error.log"
apacheRestart="service httpd restart"
failRegex="exit signal Segmentation fault"
scriptLog="/usr/local/websites-logs/`basename $0`.log"

while true; do
echo "`date` (re)starting control loop"
tail --follow=name --retry -n 0 "$errLog" 2>/dev/null | while read logLine; do
if [[ `echo "$logLine" | egrep "$failRegex"` ]]; then

I want to add an OR condition to my if statement and wondered if this is the correct syntax?

Code:
#!/bin/bash

errLog="/usr/local/website-logs/error.log"
apacheRestart="service httpd restart"
failRegex="exit signal Segmentation fault"
failRegex1="server seems busy"
scriptLog="/usr/local/websites-logs/`basename $0`.log"

while true; do
echo "`date` (re)starting control loop"
tail --follow=name --retry -n 0 "$errLog" 2>/dev/null | while read logLine; do
if [[ `echo "$logLine" | egrep "$failRegex"` ]] ||  [[ `echo "$logLine" | egrep "$failRegex1"` ]]; then

---------- Post updated at 12:38 PM ---------- Previous update was at 12:33 PM ----------

and is there some special need to the double brackets in this script I found online?
 

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LEARN ABOUT OPENSOLARIS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a    Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.11							    30 Jan 2004 							 script(1)
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