[bug #30771] gnu grep segfault from incorrect option to -f

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?30771>

                 Summary: gnu grep segfault from incorrect option to -f
                 Project: grep
            Submitted by: None
            Submitted on: Fri 13 Aug 2010 09:40:21 PM UTC
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

The following example gives a segfault in GNU grep (v2.6.3):

echo hi | grep -Fi -f /tmp/

Of course, that is an incorrect grep invocation, but the behavior is
inconsistent with this example:

echo hi | grep -Fi -f /tmp/

Here grep fails with exit code 1 as if there were no matches.

I recommend just adding a simple check that the filename argument of the -f
option does in fact refer to a regular file.

Thanks,
Bake Timmons





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