diff options
| -rw-r--r-- | editors/sed.c | 45 | ||||
| -rwxr-xr-x | testsuite/sed.tests | 7 |
2 files changed, 33 insertions, 19 deletions
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 pipe_putc(char c) 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 void do_subst_w_backrefs(char *line, char *replace) } } -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 @@ static int do_subst_command(sed_cmd_t *sed_cmd, char **line) 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 @@ static int do_subst_command(sed_cmd_t *sed_cmd, char **line) && (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)); - /* Copy rest of string into output pipeline */ + 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); - while (*oldline) - pipe_putc(*oldline++); - pipe_putc(0); + /* Copy rest of string into output pipeline */ + while (1) { + char c = *line++; + pipe_putc(c); + if (c == '\0') + break; + } - free(*line); - *line = G.pipeline.buf; + free(*line_p); + *line_p = G.pipeline.buf; return altered; } diff --git a/testsuite/sed.tests b/testsuite/sed.tests index a9d9ada..696d980 100755 --- a/testsuite/sed.tests +++ b/testsuite/sed.tests @@ -241,4 +241,11 @@ testing "sed 2d;2,1p (gnu compat)" \ "third\n" "" \ "first\nsecond\nthird\nfourth\n" +# Regex means: "match / at BOL or nothing, then one or more not-slashes". +# The bug was that second slash in /usr/lib was treated as "at BOL" too. +testing "sed beginning (^) matches only once" \ + "sed 's,\(^/\|\)[^/][^/]*,>\0<,g'" \ + ">/usr</>lib<\n" "" \ + "/usr/lib\n" + exit $FAILCOUNT |