grep: fix -w match if first match isn't a word, but second is. Closes 4520
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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6f068904dc
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@ -418,13 +418,15 @@ static int grep_file(FILE *file)
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found = 1;
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} else {
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char c = ' ';
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if (match_at > line || gl->matched_range.rm_so != 0)
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if (match_at > line || gl->matched_range.rm_so != 0) {
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c = match_at[gl->matched_range.rm_so - 1];
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}
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if (!isalnum(c) && c != '_') {
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c = match_at[gl->matched_range.rm_eo];
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if (!c || (!isalnum(c) && c != '_')) {
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found = 1;
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} else {
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}
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if (!isalnum(c) && c != '_') {
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found = 1;
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} else {
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/*
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* Why check gl->matched_range.rm_eo?
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* Zero-length match makes -w skip the line:
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@ -433,18 +435,17 @@ static int grep_file(FILE *file)
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* Without such check, we can loop forever.
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*/
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#if !ENABLE_EXTRA_COMPAT
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if (gl->matched_range.rm_eo != 0) {
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match_at += gl->matched_range.rm_eo;
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match_flg |= REG_NOTBOL;
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goto opt_w_again;
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}
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#else
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if (gl->matched_range.rm_eo > start_pos) {
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start_pos = gl->matched_range.rm_eo;
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goto opt_w_again;
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}
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#endif
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if (gl->matched_range.rm_eo != 0) {
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match_at += gl->matched_range.rm_eo;
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match_flg |= REG_NOTBOL;
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goto opt_w_again;
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}
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#else
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if (gl->matched_range.rm_eo > start_pos) {
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start_pos = gl->matched_range.rm_eo;
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goto opt_w_again;
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}
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#endif
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}
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}
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}
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@ -165,6 +165,12 @@ testing "grep -w word doesn't match wordword" \
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"wordword\n" \
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""
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testing "grep -w word match second word" \
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"grep -w word input" \
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"bword,word\n""wordb,word\n""bwordb,word\n" \
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"bword,word\n""wordb,word\n""bwordb,word\n" \
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""
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# testing "test name" "commands" "expected result" "file input" "stdin"
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# file input will be file called "input"
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# test can create a file "actual" instead of writing to stdout
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