[6180] in Athena Bugs
vax 7.1H: grep
daemon@ATHENA.MIT.EDU (Bruce R Lewis)
Mon Oct 8 14:45:52 1990
To: bugs@ATHENA.MIT.EDU
Date: Mon, 08 Oct 90 14:45:38 EDT
From: Bruce R Lewis <brlewis@ATHENA.MIT.EDU>
System name: prep-8
Type and version: CVAXSTAR 7.1H (4 update(s) to same version)
Display type: SM
What were you trying to do?
In a sh script:
if [ `foo | grep -c bar baz` -eq 1 ]; then ...
What's wrong:
grep prints nothing if no matches are found, causing the
error:
test: too many arguments
What should have happened:
It should print a count of matching lines, even if that count
is 0. Alternatively, the man page should be changed to
reflect actual behavior.
Please describe any relevant documentation references:
From the man page:
-c Only a count of matching lines is printed.
Workaround:
if [ 0`foo | grep -c bar baz` -eq 1 ]; then ...
