Re: grep -C bogus

[Ulrich Drepper]

Dan Jacobson <address@hidden> writes:

> $ man grep
>        -B NUM, --before-context=NUM
>               Print NUM lines of leading context before  matching
>               lines.
> 
>        -C [NUM], -NUM, --context[=NUM]
>               Print NUM lines (default 2) of output context.
> $ seq 1 10|sed 5s/$/bbbb/|grep -B 1 b
> 4
> 5bbbb
> $ seq 1 10|sed 5s/$/bbbb/|grep -C 1 b
> grep: b: No such file or directory

And this is correct since the parameter for C is optional.  What you want is

$ seq 1 10|sed 5s/$/bbbb/|grep -C1 b

If anything the --help text should be changed.

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