commit 222c9e081fe4aa14fbf63a7a82c5eb3382244d6f
Author: FRIGN <[email protected]>
Date:   Wed Feb 18 11:43:34 2015 +0100

    sed(1): Add back line numbers to compiler error messages

diff --git a/sed.c b/sed.c
index 0479b3d..057c5a5 100644
--- a/sed.c
+++ b/sed.c
@@ -355,6 +355,15 @@ strnacpy(String *dst, char *src, size_t n)
        strlcpy(dst->str, src, len);
 }
 
+void
+leprintf(char *s)
+{
+       if (errno)
+               eprintf("%zu: %s: %s\n", lineno, s, strerror(errno));
+       else
+               eprintf("%zu: %s\n", lineno, s);
+}
+
 /* FIXME: write usage message */
 void
 usage(void)
@@ -413,9 +422,9 @@ compile(char *s, int isfile)
                        s = chompr(s, '!');
 
                        if (!isascii(*s) || !(pc->fninfo = 
&fns[(unsigned)*s])->fn)
-                               eprintf("bad sed function\n");
+                               leprintf("bad sed function");
                        if (pc->range.naddr > pc->fninfo->naddr)
-                               eprintf("wrong number of addresses\n");
+                               leprintf("wrong number of addresses");
                        s++;
 
                        if (pc->fninfo->getarg)
@@ -464,7 +473,7 @@ make_range(Range *range, char *s)
        if      (range->beg.type == EVERY  && range->end.type == IGNORE) 
range->naddr = 0;
        else if (range->beg.type != IGNORE && range->end.type == IGNORE) 
range->naddr = 1;
        else if (range->beg.type != IGNORE && range->end.type != IGNORE) 
range->naddr = 2;
-       else eprintf("this is impossible...\n");
+       else leprintf("this is impossible...");
 
        return s;
 }
@@ -490,7 +499,7 @@ make_addr(Addr *addr, char *s)
                        rlen = echarntorune(&r, s, p - s);
                }
                if (r == '\\')
-                       eprintf("bad delimiter '\\'\n");
+                       leprintf("bad delimiter '\\'");
                delim = r;
                s += rlen;
                rlen = echarntorune(&r, s, p - s);
@@ -501,7 +510,7 @@ make_addr(Addr *addr, char *s)
                        addr->type = REGEX;
                        p = find_delim(s, delim, 1);
                        if (!*p)
-                               eprintf("unclosed regex\n");
+                               leprintf("unclosed regex");
                        p -= escapes(s, p, delim, 0);
                        *p++ = '\0';
                        addr->u.re = emalloc(sizeof(*addr->u.re));
@@ -604,9 +613,9 @@ stol(char *s, char **endp)
        n = strtol(s, endp, 10);
 
        if (errno)
-               eprintf("strtol %s:", s);
+               leprintf("strtol:");
        if (*endp == s)
-               eprintf("strtol %s: invalid number\n", s);
+               leprintf("strtol: invalid number");
 
        return n;
 }
@@ -668,7 +677,7 @@ echarntorune(Rune *r, char *s, size_t n)
 {
        size_t rlen = charntorune(r, s, n);
        if (!rlen || *r == Runeerror)
-               eprintf("invalid UTF-8\n");
+               leprintf("invalid UTF-8");
        return rlen;
 }
 
@@ -692,7 +701,7 @@ insert_labels(void)
                                }
                        }
                        if (i == labels.size)
-                               eprintf("bad label\n");
+                               leprintf("bad label");
                }
        }
 }
@@ -795,7 +804,7 @@ get_r_arg(Cmd *c, char *s)
        char *p = semicolon_arg(s = chomp(s));
 
        if (p == s)
-               eprintf("no file name\n");
+               leprintf("no file name");
 
        c->u.acir.str.str = estrndup(s, p - s);
        c->u.acir.print = write_file;
@@ -825,7 +834,7 @@ get_s_arg(Cmd *c, char *s)
                c->u.s.p = 0;
 
                if (!*s || *s == '\\')
-                       eprintf("bad delimiter\n");
+                       leprintf("bad delimiter");
 
                p = s + strlen(s);
                s += echarntorune(&delim, s, p - s);
@@ -837,7 +846,7 @@ get_s_arg(Cmd *c, char *s)
 
                p = find_delim(s, delim, 1);
                if (!*p)
-                       eprintf("missing second delimiter\n");
+                       leprintf("missing second delimiter");
                p -= escapes(s, p, delim, 0);
                *p = '\0';
 
@@ -859,7 +868,7 @@ get_s_arg(Cmd *c, char *s)
        if (!*p) { /* no third delimiter */
                /* FIXME: same backslash counting as aci_append() */
                if (p[-1] != '\\')
-                       eprintf("missing third delimiter or 
<backslash><newline>\n");
+                       leprintf("missing third delimiter or 
<backslash><newline>");
                p[-1] = '\n';
                gflags.s_cont = 1;
        } else {
@@ -872,7 +881,7 @@ get_s_arg(Cmd *c, char *s)
                if (esc) {
                        esc = 0;
                        if (isdigit(*p) && c->u.s.re && (size_t)(*p - '0') > 
c->u.s.re->re_nsub)
-                               eprintf("back reference number greater than 
number of groups\n");
+                               leprintf("back reference number greater than 
number of groups");
                } else if (*p == '\\') {
                        esc = 1;
                }
@@ -927,7 +936,7 @@ get_w_arg(Cmd *c, char *s)
        Wfile *w, **wp;
 
        if (p == s)
-               eprintf("no file name\n");
+               leprintf("no file name");
 
        /* man -Wsigncompare is annoying */
        for (wp = (Wfile **)wfiles.data; (size_t)(wp - (Wfile **)wfiles.data) < 
wfiles.size; wp++) {
@@ -941,7 +950,7 @@ get_w_arg(Cmd *c, char *s)
        w->path = estrndup(s, p - s);
 
        if (!(w->file = fopen(w->path, "w")))
-               eprintf("fopen failed\n");
+               leprintf("fopen failed");
 
        c->u.file = w->file;
 
@@ -971,7 +980,7 @@ get_y_arg(Cmd *c, char *s)
        nrunes2 = utfnlen(s, p - s);
 
        if (nrunes1 != nrunes2)
-               eprintf("different set lengths\n");
+               leprintf("different set lengths");
 
        c->u.y.set2 = strtorunes(s, utfnlen(s, p - s));
 
@@ -992,7 +1001,7 @@ get_colon_arg(Cmd *c, char *s)
        char *p = semicolon_arg(s = chomp(s));
 
        if (p == s)
-               eprintf("no label name\n");
+               leprintf("no label name");
 
        c->u.label = estrndup(s, p - s);
        push(&labels, (void *)(c - prog));
@@ -1012,7 +1021,7 @@ get_rbrace_arg(Cmd *c, char *s)
        Cmd *lbrace;
 
        if (!braces.size)
-               eprintf("extra }\n");
+               leprintf("extra }");
 
        lbrace = prog + (ptrdiff_t)pop(&braces);
        lbrace->u.offset = c - prog;
@@ -1042,7 +1051,7 @@ run(void)
 {
        lineno = 0;
        if (braces.size)
-               eprintf("extra {\n");
+               leprintf("extra {");
 
        /* genbuf has already been initialized, patt will be in new_line
         * (or we'll halt) */
@@ -1094,7 +1103,7 @@ match_addr(Addr *a)
                return !regexec(a->u.re, patt.str, 0, NULL, 0);
        case LASTRE:
                if (!lastre)
-                       eprintf("no previous regex\n");
+                       leprintf("no previous regex");
                return !regexec(lastre, patt.str, 0, NULL, 0);
        }
 }
@@ -1420,7 +1429,7 @@ cmd_s(Cmd *c)
                return;
 
        if (!c->u.s.re && !lastre)
-               eprintf("no previous regex\n");
+               leprintf("no previous regex");
 
        regex_t *re = c->u.s.re ? c->u.s.re : lastre;
        regmatch_t pmatch[re->re_nsub + 1];
@@ -1453,7 +1462,7 @@ cmd_s(Cmd *c)
                                strnacat(&genbuf, p, len);
                                p += len;
                                switch (*p) {
-                               default: eprintf("this shouldn't be 
possible\n");
+                               default: leprintf("this shouldn't be possible");
                                case '\0':
                                        /* we're at the end, back up one so the 
++p will put us on
                                         * the null byte to break out of the 
loop */
@@ -1466,7 +1475,7 @@ cmd_s(Cmd *c)
                                        if (isdigit(*++p)) { /* backreference */
                                                /* only need to check here if 
using lastre, otherwise we checked when building */
                                                if (!c->u.s.re && (size_t)(*p - 
'0') > re->re_nsub)
-                                                       eprintf("back reference 
number greater than number of groups\n");
+                                                       leprintf("back 
reference number greater than number of groups");
                                                regmatch_t *rm = &pmatch[*p - 
'0'];
                                                strnacat(&genbuf, s + 
rm->rm_so, rm->rm_eo - rm->rm_so);
                                        } else { /* character after backslash 
taken literally (well one byte, but it works) */

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