CVS log for src/usr.bin/grep/grep.c

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Default branch: MAIN
Current tag: OPENBSD_4_1_BASE

Revision 1.38 / (download) - annotate - [select for diffs], Tue Feb 13 21:48:20 2007 UTC (17 years, 3 months ago) by kili
Branch: MAIN
CVS Tags: OPENBSD_4_2_BASE, OPENBSD_4_2, OPENBSD_4_1_BASE, OPENBSD_4_1
Changes since 1.37: +9 -18 lines
Diff to previous 1.37 (colored)

- Be explicit on command line checking, instead of relying on patterns,
  which may be NULL (e.g. -e '').
- let add_pattern() decide how to deal with empty patterns, don't do
  magic in read_patterns().

This unbreaks stuff like grep -e '', and makes grep -f <file> more
POSIX compliant. Semantics for grep -f /dev/null (or any other empty
file) may be questionable, but this case isn't specified by POSIX,
and matching nothing at all seems to be sane.

Thanks to otto@, who mentioned potential problems related to the
-x option with the first patch i sent.

ok jaredy@ (some time ago), otto@, millert@

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