sed: fix " echo /usr/lib | sed 's,\(^/\|\)[^/][^/]*,..,g' " bug
function old new delta
process_files 2102 2091 -11
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/editors/sed.c b/editors/sed.c
index de18996..8b4f60a 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -589,7 +589,7 @@
static void do_subst_w_backrefs(char *line, char *replace)
{
- int i,j;
+ int i, j;
/* go through the replacement string */
for (i = 0; replace[i]; i++) {
@@ -624,23 +624,24 @@
}
}
-static int do_subst_command(sed_cmd_t *sed_cmd, char **line)
+static int do_subst_command(sed_cmd_t *sed_cmd, char **line_p)
{
- char *oldline = *line;
+ char *line = *line_p;
int altered = 0;
unsigned match_count = 0;
regex_t *current_regex;
+ current_regex = sed_cmd->sub_match;
/* Handle empty regex. */
- if (sed_cmd->sub_match == NULL) {
+ if (!current_regex) {
current_regex = G.previous_regex_ptr;
if (!current_regex)
bb_error_msg_and_die("no previous regexp");
- } else
- G.previous_regex_ptr = current_regex = sed_cmd->sub_match;
+ }
+ G.previous_regex_ptr = current_regex;
/* Find the first match */
- if (REG_NOMATCH == regexec(current_regex, oldline, 10, G.regmatch, 0))
+ if (REG_NOMATCH == regexec(current_regex, line, 10, G.regmatch, 0))
return 0;
/* Initialize temporary output buffer. */
@@ -657,7 +658,7 @@
The match_count check is so not to break
echo "hi" | busybox sed 's/^/!/g' */
if (!G.regmatch[0].rm_so && !G.regmatch[0].rm_eo && match_count) {
- pipe_putc(*oldline++);
+ pipe_putc(*line++);
continue;
}
@@ -669,35 +670,41 @@
&& (sed_cmd->which_match != match_count)
) {
for (i = 0; i < G.regmatch[0].rm_eo; i++)
- pipe_putc(*oldline++);
+ pipe_putc(*line++);
continue;
}
/* print everything before the match */
for (i = 0; i < G.regmatch[0].rm_so; i++)
- pipe_putc(oldline[i]);
+ pipe_putc(line[i]);
/* then print the substitution string */
- do_subst_w_backrefs(oldline, sed_cmd->string);
+ do_subst_w_backrefs(line, sed_cmd->string);
/* advance past the match */
- oldline += G.regmatch[0].rm_eo;
+ line += G.regmatch[0].rm_eo;
/* flag that something has changed */
altered++;
/* if we're not doing this globally, get out now */
if (sed_cmd->which_match)
break;
- } while (*oldline && (regexec(current_regex, oldline, 10, G.regmatch, 0) != REG_NOMATCH));
+
+ if (*line == '\0')
+ break;
+//maybe (G.regmatch[0].rm_eo ? REG_NOTBOL : 0) instead of unconditional REG_NOTBOL?
+ } while (regexec(current_regex, line, 10, G.regmatch, REG_NOTBOL) != REG_NOMATCH);
/* Copy rest of string into output pipeline */
+ while (1) {
+ char c = *line++;
+ pipe_putc(c);
+ if (c == '\0')
+ break;
+ }
- while (*oldline)
- pipe_putc(*oldline++);
- pipe_putc(0);
-
- free(*line);
- *line = G.pipeline.buf;
+ free(*line_p);
+ *line_p = G.pipeline.buf;
return altered;
}