UNIX for Dummies Questions & Answers

I receive a segmentation fault on some servers when grepping a string, but not when I use -i, and vice-versa. I have googled this and realise it is usually a hardware / memory issue.

I'd like to write an if statement that says "if grep string returns 'Segmentation fault' then grep the same string with -i".

I tried assigning the value of the grep statement to a variable but it's not storing the "Segmentation fault" error.

SEARCH="`zgrep -i search_string /path/to`"

How can I check for this when grepping? Is Segmentation fault from stderr?

It sounds more like a software bug to me, if it happens on more than one system. Try upgrading your version of grep.

If it really is a hardware problem, your entire system is suspect and you should fix it at once before something terrible happens, instead of trying to ignore and work around the burning engine...

Company machines so I can't do anything with them. Any help w/ that condition?

Maybe you can use alternatives like awk or perl, or a different regex. Anything's better than an if-statement for "in case this crummy program crashes", which again, is like an if-statement for "in case the engine explodes, how to keep going". What's your regex?

It's like this:

Code:

zgrep "$1" /path/to/search/"$2"*|sed 's/\#20/ /g'|proprietary_command_to_format_log_output | egrep -v "unwanted_strings"

We typically have this menu to do all log searches but I have this little kludge which makes it easier. The only thing is sometimes I get a memory fault depending on if I use -i or not.