Question about grep or qgrep for windows

[Nomen]

I have both grep and qgrep on my win-7 system (and qgrep on my win-98 system) and generally I can get it to do what I want.  But a current task is really p***ing me off.

I want to extract from my router's log files all lines that contain "SRC=18."

I don't want lines that contain "SRC=186.43.what-ever".  Just the lines where the first octet is 18.  not 185 or 189, etc.

My command line is [qgrep -e "SRC=18." *.log > out.txt]

But my output always includes 18n. and 18.  It's as if the "." is being completely ignored in the search string.  It doesn't matter if I put the search string in quotes or not.

Any ideas?

Edit:  see also https://stackoverflow.com/questions/10346816/using-grep-to-search-for-a-string-that-has-a-dot-in-it

:-(

Edit:  Ok, all I needed to do was put the period inside square brackets.  Don't need to put quotes around the whole thing either.

 

Edited June 7, 2021 by Nomen