diff options
Diffstat (limited to 'toys')
| -rw-r--r-- | toys/pending/sed.c | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/toys/pending/sed.c b/toys/pending/sed.c index 16cb0810..0d82ca4c 100644 --- a/toys/pending/sed.c +++ b/toys/pending/sed.c @@ -277,7 +277,7 @@ static void walk_pattern(char **pline, long plen) while (logrus) { char *str, c = logrus->c; - // Have we got a matching range for this rule? + // Have we got a line or regex matching range for this rule? if (*logrus->lmatch || *logrus->rmatch) { int miss = 0; long lm; @@ -346,7 +346,8 @@ static void walk_pattern(char **pline, long plen) } } else if (c=='c') { str = logrus->arg1+(char *)logrus; - if (!logrus->hit) emit(str, strlen(str), 1); + if (!logrus->hit || (!logrus->lmatch[1] && !logrus->rmatch[1])) + emit(str, strlen(str), 1); goto done; } else if (c=='d') goto done; else if (c=='D') { @@ -403,7 +404,7 @@ static void walk_pattern(char **pline, long plen) char *rline = line, *new = logrus->arg2 + (char *)logrus, *swap, *rswap; regmatch_t *match = (void *)toybuf; regex_t *reg = (void *)(logrus->arg1+(char *)logrus); - unsigned mflags = 0, count = 0, rlen = len, mlen, off, newlen; + int mflags = 0, count = 0, zmatch = 1, rlen = len, mlen, off, newlen; // Find match in remaining line (up to remaining len) while (!ghostwheel(reg, rline, rlen, 10, match, mflags)) { @@ -411,11 +412,12 @@ static void walk_pattern(char **pline, long plen) // Zero length matches don't count immediately after a previous match mlen = match[0].rm_eo-match[0].rm_so; - if (!mlen && !match[0].rm_so) { + if (!mlen && !zmatch) { if (!rlen--) break; rline++; + zmatch++; continue; - } + } else zmatch = 0; // If we're replacing only a specific match, skip if this isn't it off = logrus->sflags>>3; @@ -425,6 +427,9 @@ static void walk_pattern(char **pline, long plen) continue; } + // The fact getline() can allocate unbounded amounts of memory is + // a bigger issue, but while we're here check for integer overflow + if (match[0].rm_eo > INT_MAX) perror_exit(0); // newlen = strlen(new) but with \1 and & and printf escapes for (off = newlen = 0; new[off]; off++) { @@ -628,9 +633,10 @@ static void do_sed(int fd, char *name) // parses and saves delimiter from first character(s) static int unescape_delimited_string(char **pstr, char *delim) { - char *to, *from = *pstr, d; + char *to, *from, d; int rc; + to = from = *pstr; if (!delim || !*delim) { if (!(d = *(from++))) return -1; if (d == '\\') d = *(from++); @@ -638,7 +644,7 @@ static int unescape_delimited_string(char **pstr, char *delim) if (delim) *delim = d; } else d = *delim; - for (to = *pstr; *from != d; *(to++) = *(from++)) { + while (*from != d) { if (!*from) return -1; if (*from == '\\') { if (!from[1]) return -1; @@ -649,11 +655,13 @@ static int unescape_delimited_string(char **pstr, char *delim) char c = unescape(from[1]); if (c) { - *to = c; - from++; + *(to++) = c; + from+=2; + continue; } } } + *(to++) = *(from++); } rc = to-*pstr; *to = 0; @@ -763,7 +771,7 @@ static void jewel_of_judgement(char **pline, long len) reg = extend_string((void *)&corwin, fiona, corwin->arg2, line-fiona)+1; // get flags - for (line++; *line && *line != ';'; line++) { + for (line++; *line && *line != ';' && *line != '#'; line++) { long l; if (isspace(*line)) continue; @@ -846,9 +854,9 @@ append: // Extend allocation to include new string. We use offsets instead of // pointers so realloc() moving stuff doesn't break things. Do it // here instead of toybuf so there's no maximum size. - if (!corwin->arg1) corwin->arg1 = reg - (char*)corwin; reg = extend_string((void *)&corwin, line, reg - (char *)corwin, end); + line += end; // Line continuation? if (class && reg[-1] == '\\') { |