as mentioned before 'echo aaa | grep -o a' works different in gnu grep
and busybox grep.
attatched patch fixes the issue for ENABLE_EXTRA_COMPAT.
Please consider add it to fixes-1.12.1
-nc
Index: findutils/grep.c
===================================================================
--- findutils/grep.c (revision 23562)
+++ findutils/grep.c (working copy)
@@ -363,12 +363,22 @@
* (unless -v: -Fov doesnt print anything at all) */
if (found)
print_line(gl->pattern, strlen(gl->pattern), linenum, ':');
- } else {
+ } else while (1) {
+ char old = line[gl->matched_range.rm_eo];
line[gl->matched_range.rm_eo] = '\0';
print_line(line + gl->matched_range.rm_so,
gl->matched_range.rm_eo - gl->matched_range.rm_so,
linenum, ':');
- }
+ line[gl->matched_range.rm_eo] = old;
+#if !ENABLE_EXTRA_COMPAT
+ break;
+#else
+ if (re_search(&gl->compiled_regex, line, line_len,
+ gl->matched_range.rm_eo, line_len - gl->matched_range.rm_eo,
+ &gl->matched_range) < 0)
+ break;
+#endif
+ }
} else {
print_line(line, line_len, linenum, ':');
}
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