Use e-functions in sed(1)
and take off the tin-foil-head by removing checks for printf-return- values.
This commit is contained in:
FRIGN
parent
a98405d277
commit
4391984115
125
sed.c
125
sed.c
@ -5,9 +5,6 @@
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* lack of newline at end of file, currently we add one. what should we do?
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* allow "\\t" for "\t" etc. in regex? in replacement text?
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* POSIX says don't flush on N when out of input, but GNU and busybox do.
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* currently call fatal() when compiling and when running, do we need to fclose
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* wfiles when compiling and nothing has been written to them? if not don't
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* need fatal() when compiling only when running
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*/
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#include <ctype.h>
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@ -128,7 +125,6 @@ void stracpy(String *dst, char *src);
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void strnacpy(String *dst, char *src, size_t n);
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/* Cleanup and errors */
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void fatal(char *s);
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void usage(void);
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/* Parsing functions and related utilities */
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@ -279,8 +275,7 @@ resize(void **ptr, size_t *nmemb, size_t size, size_t new_nmemb, void **next)
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void *n, *tmp;
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if (new_nmemb) {
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if (!(tmp = realloc(*ptr, new_nmemb * size)))
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fatal("realloc failed");
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tmp = erealloc(*ptr, new_nmemb * size);
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} else { /* turns out realloc(*ptr, 0) != free(*ptr) */
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free(*ptr);
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tmp = NULL;
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@ -360,22 +355,6 @@ strnacpy(String *dst, char *src, size_t n)
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strlcpy(dst->str, src, len);
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}
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/* FIXME: more info, better error messages
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* this currently exists as a place to close all wfiles when not doing a full
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* cleanup() on fatal errors. also means I don't use all the ealloc etc. libutil
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* functions because I need to do this first. what's a better way to do that?
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*/
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void
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fatal(char *s)
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{
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while (wfiles.size) {
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Wfile *wp = (Wfile *)pop(&wfiles);
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if (wp->file && fclose(wp->file))
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weprintf("fclose failed\n");
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}
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eprintf("%zu: %s: %s\n", lineno, s, strerror(errno));
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}
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/* FIXME: write usage message */
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void
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usage(void)
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@ -397,7 +376,7 @@ compile(char *s, int isfile)
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f = isfile ? fopen(s, "r") : fmemopen(s, strlen(s), "r");
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if (!f)
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fatal("fopen/fmemopen failed");
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eprintf("fopen/fmemopen failed\n");
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/* NOTE: get arg functions can't use genbuf */
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while (read_line(f, &genbuf) != EOF) {
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@ -434,9 +413,9 @@ compile(char *s, int isfile)
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s = chompr(s, '!');
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if (!isascii(*s) || !(pc->fninfo = &fns[(unsigned)*s])->fn)
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fatal("bad sed function");
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eprintf("bad sed function\n");
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if (pc->range.naddr > pc->fninfo->naddr)
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fatal("wrong number of addresses");
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eprintf("wrong number of addresses\n");
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s++;
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if (pc->fninfo->getarg)
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@ -463,7 +442,7 @@ read_line(FILE *f, String *s)
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if ((len = getline(&s->str, &s->cap, f)) < 0) {
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if (ferror(f))
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fatal("getline failed");
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eprintf("getline failed\n");
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return EOF;
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}
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if (s->str[--len] == '\n')
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@ -485,7 +464,7 @@ make_range(Range *range, char *s)
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if (range->beg.type == EVERY && range->end.type == IGNORE) range->naddr = 0;
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else if (range->beg.type != IGNORE && range->end.type == IGNORE) range->naddr = 1;
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else if (range->beg.type != IGNORE && range->end.type != IGNORE) range->naddr = 2;
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else fatal("this is impossible...");
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else eprintf("this is impossible...\n");
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return s;
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}
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@ -511,7 +490,7 @@ make_addr(Addr *addr, char *s)
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rlen = echarntorune(&r, s, p - s);
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}
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if (r == '\\')
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fatal("bad delimiter '\\'");
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eprintf("bad delimiter '\\'\n");
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delim = r;
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s += rlen;
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rlen = echarntorune(&r, s, p - s);
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@ -522,11 +501,10 @@ make_addr(Addr *addr, char *s)
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addr->type = REGEX;
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p = find_delim(s, delim, 1);
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if (!*p)
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fatal("unclosed regex");
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eprintf("unclosed regex\n");
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p -= escapes(s, p, delim, 0);
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*p++ = '\0';
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if (!(addr->u.re = malloc(sizeof(*addr->u.re))))
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fatal("malloc failed");
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addr->u.re = emalloc(sizeof(*addr->u.re));
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eregcomp(addr->u.re, s, 0);
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s = p;
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}
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@ -609,9 +587,7 @@ chompr(char *s, Rune rune)
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Rune *
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strtorunes(char *s, size_t nrunes)
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{
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Rune *rs = malloc(sizeof(*rs) * nrunes + 1), *rp = rs;
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if (!rs)
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fatal("malloc failed");
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Rune *rs = emalloc(sizeof(*rs) * nrunes + 1), *rp = rs;
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while (nrunes--)
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s += chartorune(rp++, s);
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@ -628,9 +604,9 @@ stol(char *s, char **endp)
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n = strtol(s, endp, 10);
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if (errno)
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fatal("strtol failed");
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eprintf("strtol %s:", s);
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if (*endp == s)
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fatal("no number");
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eprintf("strtol %s: invalid number\n", s);
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return n;
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}
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@ -692,7 +668,7 @@ echarntorune(Rune *r, char *s, size_t n)
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{
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size_t rlen = charntorune(r, s, n);
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if (!rlen || *r == Runeerror)
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fatal("invalid UTF-8");
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eprintf("invalid UTF-8\n");
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return rlen;
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}
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@ -716,7 +692,7 @@ insert_labels(void)
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}
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}
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if (i == labels.size)
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fatal("bad label");
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eprintf("bad label\n");
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}
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}
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}
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@ -795,8 +771,7 @@ get_bt_arg(Cmd *c, char *s)
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char *p = semicolon_arg(s = chomp(s));
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if (p != s) {
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if (!(c->u.label = strndup(s, p - s)))
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fatal("strdup failed");
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c->u.label = estrndup(s, p - s);
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} else {
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c->u.label = NULL;
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}
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@ -820,11 +795,9 @@ get_r_arg(Cmd *c, char *s)
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char *p = semicolon_arg(s = chomp(s));
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if (p == s)
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fatal("no file name");
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if (!(c->u.acir.str.str = strndup(s, p - s)))
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fatal("strdup failed");
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eprintf("no file name\n");
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c->u.acir.str.str = estrndup(s, p - s);
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c->u.acir.print = write_file;
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return p;
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@ -852,7 +825,7 @@ get_s_arg(Cmd *c, char *s)
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c->u.s.p = 0;
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if (!*s || *s == '\\')
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fatal("bad delimiter");
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eprintf("bad delimiter\n");
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p = s + strlen(s);
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s += echarntorune(&delim, s, p - s);
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@ -864,15 +837,14 @@ get_s_arg(Cmd *c, char *s)
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p = find_delim(s, delim, 1);
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if (!*p)
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fatal("missing second delimiter");
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eprintf("missing second delimiter\n");
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p -= escapes(s, p, delim, 0);
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*p = '\0';
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if (lastre) {
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c->u.s.re = NULL;
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} else {
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if (!(c->u.s.re = emalloc(sizeof(*c->u.s.re))))
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fatal("malloc failed");
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c->u.s.re = emalloc(sizeof(*c->u.s.re));
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/* FIXME: different eregcomp that calls fatal */
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eregcomp(c->u.s.re, s, 0);
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}
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@ -887,7 +859,7 @@ get_s_arg(Cmd *c, char *s)
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if (!*p) { /* no third delimiter */
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/* FIXME: same backslash counting as aci_append() */
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if (p[-1] != '\\')
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fatal("missing third delimiter or <backslash><newline>");
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eprintf("missing third delimiter or <backslash><newline>\n");
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p[-1] = '\n';
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gflags.s_cont = 1;
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} else {
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@ -900,7 +872,7 @@ get_s_arg(Cmd *c, char *s)
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if (esc) {
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esc = 0;
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if (isdigit(*p) && c->u.s.re && (size_t)(*p - '0') > c->u.s.re->re_nsub)
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fatal("back reference number greater than number of groups");
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eprintf("back reference number greater than number of groups\n");
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} else if (*p == '\\') {
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esc = 1;
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}
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@ -955,7 +927,7 @@ get_w_arg(Cmd *c, char *s)
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Wfile *w, **wp;
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if (p == s)
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fatal("no file name");
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eprintf("no file name\n");
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/* man -Wsigncompare is annoying */
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for (wp = (Wfile **)wfiles.data; (size_t)(wp - (Wfile **)wfiles.data) < wfiles.size; wp++) {
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@ -965,14 +937,11 @@ get_w_arg(Cmd *c, char *s)
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}
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}
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if (!(w = malloc(sizeof(*w))))
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fatal("malloc failed");
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if (!(w->path = strndup(s, p - s)))
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fatal("strdup failed");
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w = emalloc(sizeof(*w));
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w->path = estrndup(s, p - s);
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if (!(w->file = fopen(w->path, "w")))
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fatal("fopen failed");
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eprintf("fopen failed\n");
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c->u.file = w->file;
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@ -1002,7 +971,7 @@ get_y_arg(Cmd *c, char *s)
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nrunes2 = utfnlen(s, p - s);
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if (nrunes1 != nrunes2)
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fatal("different set lengths");
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eprintf("different set lengths\n");
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c->u.y.set2 = strtorunes(s, utfnlen(s, p - s));
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@ -1023,11 +992,9 @@ get_colon_arg(Cmd *c, char *s)
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char *p = semicolon_arg(s = chomp(s));
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if (p == s)
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fatal("no label name");
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if (!(c->u.label = strndup(s, p - s)))
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fatal("strdup failed");
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eprintf("no label name\n");
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c->u.label = estrndup(s, p - s);
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push(&labels, (void *)(c - prog));
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return p;
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}
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@ -1045,7 +1012,7 @@ get_rbrace_arg(Cmd *c, char *s)
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Cmd *lbrace;
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if (!braces.size)
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fatal("extra }");
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eprintf("extra }\n");
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lbrace = prog + (ptrdiff_t)pop(&braces);
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lbrace->u.offset = c - prog;
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@ -1075,7 +1042,7 @@ run(void)
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{
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lineno = 0;
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if (braces.size)
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fatal("extra {");
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eprintf("extra {\n");
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/* genbuf has already been initialized, patt will be in new_line
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* (or we'll halt) */
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@ -1127,7 +1094,7 @@ match_addr(Addr *a)
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return !regexec(a->u.re, patt.str, 0, NULL, 0);
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case LASTRE:
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if (!lastre)
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fatal("no previous regex");
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eprintf("no previous regex\n");
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return !regexec(lastre, patt.str, 0, NULL, 0);
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}
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}
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@ -1175,9 +1142,9 @@ is_eof(FILE *f)
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c = fgetc(f);
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if (c == EOF && ferror(f))
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fatal("fgetc failed");
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eprintf("fgetc failed\n");
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if (c != EOF && ungetc(c, f) == EOF)
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fatal("ungetc failed");
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eprintf("ungetc failed\n");
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return c == EOF;
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}
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@ -1220,9 +1187,9 @@ void
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check_puts(char *s, FILE *f)
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{
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if (s && fputs(s, f) == EOF)
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fatal("fputs failed");
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eprintf("fputs failed\n");
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if (fputs("\n", f) == EOF)
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fatal("fputs failed");
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eprintf("fputs failed\n");
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}
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/* iterate from beg to end updating ranges so we don't miss any commands
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@ -1362,24 +1329,21 @@ cmd_l(Cmd *c)
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*/
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for (p = patt.str, end = p + strlen(p); p < end; p += rlen) {
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if (isascii(*p) && escapes[(unsigned)*p]) {
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if (printf("%s", escapes[(unsigned)*p]) < 0)
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fatal("printf failed");
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printf("%s", escapes[(unsigned)*p]);
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rlen = 1;
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} else if (!(rlen = charntorune(&r, p, end - p))) {
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/* ran out of chars, print the bytes of the short sequence */
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for (; p < end; p++)
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if (printf("\\%03hho", (unsigned char)*p) < 0)
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fatal("printf failed");
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printf("\\%03hho", (unsigned char)*p);
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break;
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} else if (r == Runeerror) {
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for (; rlen; rlen--, p++)
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if (printf("\\%03hho", (unsigned char)*p) < 0)
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fatal("printf failed");
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printf("\\%03hho", (unsigned char)*p);
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} else {
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while (fwrite(p, rlen, 1, stdout) < 1 && errno == EINTR)
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;
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if (ferror(stdout))
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fatal("fwrite failed");
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eprintf("fwrite failed\n");
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}
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}
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check_puts("$", stdout);
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@ -1456,7 +1420,7 @@ cmd_s(Cmd *c)
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return;
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if (!c->u.s.re && !lastre)
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fatal("no previous regex");
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eprintf("no previous regex\n");
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regex_t *re = c->u.s.re ? c->u.s.re : lastre;
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regmatch_t pmatch[re->re_nsub + 1];
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@ -1489,7 +1453,7 @@ cmd_s(Cmd *c)
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strnacat(&genbuf, p, len);
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p += len;
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switch (*p) {
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default: fatal("this shouldn't be possible");
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default: eprintf("this shouldn't be possible\n");
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case '\0':
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/* we're at the end, back up one so the ++p will put us on
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* the null byte to break out of the loop */
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@ -1502,7 +1466,7 @@ cmd_s(Cmd *c)
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if (isdigit(*++p)) { /* backreference */
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/* only need to check here if using lastre, otherwise we checked when building */
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if (!c->u.s.re && (size_t)(*p - '0') > re->re_nsub)
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fatal("back reference number greater than number of groups");
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eprintf("back reference number greater than number of groups\n");
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regmatch_t *rm = &pmatch[*p - '0'];
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strnacat(&genbuf, s + rm->rm_so, rm->rm_eo - rm->rm_so);
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} else { /* character after backslash taken literally (well one byte, but it works) */
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@ -1629,8 +1593,7 @@ void
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cmd_equal(Cmd *c)
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{
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if (in_range(c))
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if (printf("%zu\n", lineno) < 0)
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fatal("printf failed");
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printf("%zu\n", lineno);
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}
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void
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