source: trunk/src/kmk/kmkbuiltin/printf.c@ 3131

Last change on this file since 3131 was 2900, checked in by bird, 9 years ago

output optimizations
  • Property svn:eol-style set to native
File size: 18.2 KB
Line 
1/* $NetBSD: printf.c,v 1.31 2005/03/22 23:55:46 dsl Exp $ */
2
3/*
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32/*#include <sys/cdefs.h>
33#ifndef lint
34#if !defined(BUILTIN) && !defined(SHELL)
35__COPYRIGHT("@(#) Copyright (c) 1989, 1993\n\
36 The Regents of the University of California. All rights reserved.\n");
37#endif
38#endif
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)printf.c 8.2 (Berkeley) 3/22/95";
43#else
44__RCSID("$NetBSD: printf.c,v 1.31 2005/03/22 23:55:46 dsl Exp $");
45#endif
46#endif*/ /* not lint */
47
48#if !defined(kmk_builtin_printf) && !defined(BUILTIN) && !defined(SHELL)
49# include "../make.h"
50# include "../filedef.h"
51# include "../variable.h"
52#else
53# include "config.h"
54#endif
55#include <sys/types.h>
56
57#include <ctype.h>
58#include "err.h"
59#include <errno.h>
60#include <inttypes.h>
61#include <limits.h>
62#include <locale.h>
63#include <stdarg.h>
64#include <stdio.h>
65#include <stdlib.h>
66#include <string.h>
67#include <unistd.h>
68#include "getopt.h"
69#ifdef __sun__
70# include "solfakes.h"
71#endif
72#ifdef _MSC_VER
73# include "mscfakes.h"
74#endif
75
76#include "../kmkbuiltin.h"
77
78#ifdef KBUILD_OS_WINDOWS
79/* This is a trick to speed up console output on windows. */
80# undef fwrite
81# define fwrite maybe_con_fwrite
82extern size_t maybe_con_fwrite(void const *, size_t, size_t, FILE *);
83#endif
84
85
86#ifdef __GNUC__
87#define ESCAPE '\e'
88#else
89#define ESCAPE 033
90#endif
91
92
93static size_t b_length;
94static char *b_fmt;
95static int rval;
96static char **gargv;
97#if !defined(kmk_builtin_printf) && !defined(BUILTIN) && !defined(SHELL)
98static char *g_o = NULL;
99#endif
100static struct option long_options[] =
101{
102 { "help", no_argument, 0, 261 },
103 { "version", no_argument, 0, 262 },
104 { 0, 0, 0, 0 },
105};
106
107
108static int common_printf(int argc, char *argv[]);
109static void conv_escape_str(char *, void (*)(int));
110static char *conv_escape(char *, char *);
111static char *conv_expand(const char *);
112static int getchr(void);
113static double getdouble(void);
114static int getwidth(void);
115static intmax_t getintmax(void);
116static uintmax_t getuintmax(void);
117static char *getstr(void);
118static char *mklong(const char *, int);
119static void check_conversion(const char *, const char *);
120static int usage(FILE *);
121
122static int flush_buffer(void);
123static void b_count(int);
124static void b_output(int);
125static int wrap_putchar(int ch);
126static int wrap_printf(const char *, ...);
127
128#ifdef BUILTIN /* csh builtin */
129#define kmk_builtin_printf progprintf
130#endif
131
132#ifdef SHELL /* sh (aka ash) builtin */
133#define kmk_builtin_printf printfcmd
134#include "../../bin/sh/bltin/bltin.h"
135#endif /* SHELL */
136
137/* Buffer the output because windows doesn't do line buffering of stdout. */
138static char g_achBuf[256];
139static size_t g_cchBuf;
140
141#define PF(f, func) { \
142 if (fieldwidth != -1) { \
143 if (precision != -1) \
144 (void)wrap_printf(f, fieldwidth, precision, func); \
145 else \
146 (void)wrap_printf(f, fieldwidth, func); \
147 } else if (precision != -1) \
148 (void)wrap_printf(f, precision, func); \
149 else \
150 (void)wrap_printf(f, func); \
151}
152
153#define APF(cpp, f, func) { \
154 if (fieldwidth != -1) { \
155 if (precision != -1) \
156 (void)asprintf(cpp, f, fieldwidth, precision, func); \
157 else \
158 (void)asprintf(cpp, f, fieldwidth, func); \
159 } else if (precision != -1) \
160 (void)asprintf(cpp, f, precision, func); \
161 else \
162 (void)asprintf(cpp, f, func); \
163}
164
165int kmk_builtin_printf(int argc, char *argv[], char **envp)
166{
167 int rc;
168 int ch;
169
170 /* kmk: reset getopt, set progname and reset buffer. */
171 g_progname = argv[0];
172 opterr = 1;
173 optarg = NULL;
174 optopt = 0;
175 optind = 0; /* init */
176
177#if !defined(SHELL) && !defined(BUILTIN) && !defined(kmk_builtin_printf) /* kmk did this already. */
178 (void)setlocale (LC_ALL, "");
179#endif
180
181 while ((ch = getopt_long(argc, argv, "", long_options, NULL)) != -1) {
182 switch (ch) {
183 case 261:
184 usage(stdout);
185 return 0;
186 case 262:
187 return kbuild_version(argv[0]);
188 case '?':
189 default:
190 return usage(stderr);
191 }
192 }
193 argc -= optind;
194 argv += optind;
195
196 if (argc < 1) {
197 return usage(stderr);
198 }
199
200 rc = common_printf(argc, argv);
201 return rc;
202}
203
204#ifndef kmk_builtin_printf
205/* entry point used by function.c $(printf ..,..). */
206char *kmk_builtin_func_printf(char *o, char **argv, const char *funcname)
207{
208 int rc;
209 int argc;
210
211 for (argc = 0; argv[argc] != NULL; argc++)
212 /* nothing */;
213
214 g_o = o;
215 rc = common_printf(argc, argv);
216 o = g_o;
217 g_o = NULL;
218
219 (void)funcname;
220 if (rc != 0)
221 fatal (NILF, _("$(%s): failure rc=%d\n"), funcname, rc);
222 return o;
223}
224#endif
225
226static int common_printf(int argc, char *argv[])
227{
228 char *fmt, *start;
229 int fieldwidth, precision;
230 char nextch;
231 char *format;
232 int ch;
233
234 /* kmk: reinitialize globals */
235 b_length = 0;
236 b_fmt = NULL;
237 rval = 0;
238 gargv = NULL;
239 g_cchBuf = 0;
240
241 format = *argv;
242 gargv = ++argv;
243
244#define SKIP1 "#-+ 0"
245#define SKIP2 "*0123456789"
246 do {
247 /*
248 * Basic algorithm is to scan the format string for conversion
249 * specifications -- once one is found, find out if the field
250 * width or precision is a '*'; if it is, gather up value.
251 * Note, format strings are reused as necessary to use up the
252 * provided arguments, arguments of zero/null string are
253 * provided to use up the format string.
254 */
255
256 /* find next format specification */
257 for (fmt = format; (ch = *fmt++) != '\0';) {
258 if (ch == '\\') {
259 char c_ch;
260 fmt = conv_escape(fmt, &c_ch);
261 wrap_putchar(c_ch);
262 continue;
263 }
264 if (ch != '%' || (*fmt == '%' && ++fmt)) {
265 (void)wrap_putchar(ch);
266 continue;
267 }
268
269 /* Ok - we've found a format specification,
270 Save its address for a later printf(). */
271 start = fmt - 1;
272
273 /* skip to field width */
274 fmt += strspn(fmt, SKIP1);
275 fieldwidth = *fmt == '*' ? getwidth() : -1;
276
277 /* skip to possible '.', get following precision */
278 fmt += strspn(fmt, SKIP2);
279 if (*fmt == '.')
280 ++fmt;
281 precision = *fmt == '*' ? getwidth() : -1;
282
283 fmt += strspn(fmt, SKIP2);
284
285 ch = *fmt;
286 if (!ch) {
287 flush_buffer();
288 warnx("missing format character");
289 return (1);
290 }
291 /* null terminate format string to we can use it
292 as an argument to printf. */
293 nextch = fmt[1];
294 fmt[1] = 0;
295 switch (ch) {
296
297 case 'B': {
298 const char *p = conv_expand(getstr());
299 *fmt = 's';
300 PF(start, p);
301 break;
302 }
303 case 'b': {
304 /* There has to be a better way to do this,
305 * but the string we generate might have
306 * embedded nulls. */
307 static char *a, *t;
308 char *cp = getstr();
309 /* Free on entry in case shell longjumped out */
310 if (a != NULL)
311 free(a);
312 a = NULL;
313 if (t != NULL)
314 free(t);
315 t = NULL;
316 /* Count number of bytes we want to output */
317 b_length = 0;
318 conv_escape_str(cp, b_count);
319 t = malloc(b_length + 1);
320 if (t == NULL)
321 break;
322 memset(t, 'x', b_length);
323 t[b_length] = 0;
324 /* Get printf to calculate the lengths */
325 *fmt = 's';
326 APF(&a, start, t);
327 b_fmt = a;
328 /* Output leading spaces and data bytes */
329 conv_escape_str(cp, b_output);
330 /* Add any trailing spaces */
331 wrap_printf("%s", b_fmt);
332 break;
333 }
334 case 'c': {
335 char p = getchr();
336 PF(start, p);
337 break;
338 }
339 case 's': {
340 char *p = getstr();
341 PF(start, p);
342 break;
343 }
344 case 'd':
345 case 'i': {
346 intmax_t p = getintmax();
347 char *f = mklong(start, ch);
348 PF(f, p);
349 break;
350 }
351 case 'o':
352 case 'u':
353 case 'x':
354 case 'X': {
355 uintmax_t p = getuintmax();
356 char *f = mklong(start, ch);
357 PF(f, p);
358 break;
359 }
360 case 'e':
361 case 'E':
362 case 'f':
363 case 'g':
364 case 'G': {
365 double p = getdouble();
366 PF(start, p);
367 break;
368 }
369 default:
370 flush_buffer();
371 warnx("%s: invalid directive", start);
372 return 1;
373 }
374 *fmt++ = ch;
375 *fmt = nextch;
376 /* escape if a \c was encountered */
377 if (rval & 0x100) {
378 flush_buffer();
379 return rval & ~0x100;
380 }
381 }
382 } while (gargv != argv && *gargv);
383
384 flush_buffer();
385 return rval;
386}
387
388
389/* helper functions for conv_escape_str */
390
391static void
392/*ARGSUSED*/
393b_count(int ch)
394{
395 b_length++;
396 (void)ch;
397}
398
399/* Output one converted character for every 'x' in the 'format' */
400
401static void
402b_output(int ch)
403{
404 for (;;) {
405 switch (*b_fmt++) {
406 case 0:
407 b_fmt--;
408 return;
409 case ' ':
410 wrap_putchar(' ');
411 break;
412 default:
413 wrap_putchar(ch);
414 return;
415 }
416 }
417}
418
419static int wrap_putchar(int ch)
420{
421#ifndef kmk_builtin_printf
422 if (g_o) {
423 char sz[2];
424 sz[0] = ch; sz[1] = '\0';
425 g_o = variable_buffer_output(g_o, sz, 1);
426 return ch;
427 }
428#endif
429 /* Buffered output. */
430 if (g_cchBuf + 1 < sizeof(g_achBuf)) {
431 g_achBuf[g_cchBuf++] = ch;
432 } else {
433 int rc = flush_buffer();
434 g_achBuf[g_cchBuf++] = ch;
435 if (rc)
436 return -1;
437 }
438 return 0;
439}
440
441static int wrap_printf(const char * fmt, ...)
442{
443 ssize_t cchRet;
444 va_list va;
445 char *pszTmp;
446
447 va_start(va, fmt);
448 cchRet = vasprintf(&pszTmp, fmt, va);
449 va_end(va);
450 if (cchRet >= 0) {
451#ifndef kmk_builtin_printf
452 if (g_o) {
453 g_o = variable_buffer_output(g_o, pszTmp, cchRet);
454 } else
455#endif
456 {
457 if (cchRet + g_cchBuf <= sizeof(g_achBuf)) {
458 /* We've got space in the buffer. */
459 memcpy(&g_achBuf[g_cchBuf], pszTmp, cchRet);
460 g_cchBuf += cchRet;
461 } else {
462 /* Try write out complete lines. */
463 const char *pszLeft = pszTmp;
464 ssize_t cchLeft = cchRet;
465
466 while (cchLeft > 0) {
467 const char *pchNewLine = strchr(pszLeft, '\n');
468 ssize_t cchLine = pchNewLine ? pchNewLine - pszLeft + 1 : cchLeft;
469 if (g_cchBuf + cchLine <= sizeof(g_achBuf)) {
470 memcpy(&g_achBuf[g_cchBuf], pszLeft, cchLine);
471 g_cchBuf += cchLine;
472 } else {
473 if (flush_buffer() < 0) {
474 return -1;
475 }
476 if (fwrite(pszLeft, cchLine, 1, stdout) < 1) {
477 return -1;
478 }
479 }
480 pszLeft += cchLine;
481 cchLeft -= cchLine;
482 }
483 }
484 }
485 free(pszTmp);
486 }
487 return (int)cchRet;
488}
489
490/**
491 * Flushes the g_abBuf/g_cchBuf.
492 */
493static int flush_buffer(void)
494{
495 if (g_cchBuf > 0) {
496 ssize_t cchToWrite = g_cchBuf;
497 ssize_t cchWritten = fwrite(g_achBuf, 1, g_cchBuf, stdout);
498 g_cchBuf = 0;
499 if (cchWritten >= cchToWrite) {
500 /* likely */
501 } else {
502 ssize_t off = cchWritten;
503 if (cchWritten >= 0) {
504 off = cchWritten;
505 } else if (errno == EINTR) {
506 cchWritten = 0;
507 } else {
508 return -1;
509 }
510
511 while (off < cchToWrite) {
512 cchWritten = fwrite(&g_achBuf[off], 1, cchToWrite - off, stdout);
513 if (cchWritten > 0) {
514 off += cchWritten;
515 } else if (errno == EINTR) {
516 /* nothing */
517 } else {
518 return -1;
519 }
520 }
521 }
522 }
523 return 0;
524}
525
526
527
528/*
529 * Print SysV echo(1) style escape string
530 * Halts processing string if a \c escape is encountered.
531 */
532static void
533conv_escape_str(char *str, void (*do_putchar)(int))
534{
535 int value;
536 int ch;
537 char c;
538
539 while ((ch = *str++) != '\0') {
540 if (ch != '\\') {
541 do_putchar(ch);
542 continue;
543 }
544
545 ch = *str++;
546 if (ch == 'c') {
547 /* \c as in SYSV echo - abort all processing.... */
548 rval |= 0x100;
549 break;
550 }
551
552 /*
553 * %b string octal constants are not like those in C.
554 * They start with a \0, and are followed by 0, 1, 2,
555 * or 3 octal digits.
556 */
557 if (ch == '0') {
558 int octnum = 0, i;
559 for (i = 0; i < 3; i++) {
560 if (!isdigit((unsigned char)*str) || *str > '7')
561 break;
562 octnum = (octnum << 3) | (*str++ - '0');
563 }
564 do_putchar(octnum);
565 continue;
566 }
567
568 /* \[M][^|-]C as defined by vis(3) */
569 if (ch == 'M' && *str == '-') {
570 do_putchar(0200 | str[1]);
571 str += 2;
572 continue;
573 }
574 if (ch == 'M' && *str == '^') {
575 str++;
576 value = 0200;
577 ch = '^';
578 } else
579 value = 0;
580 if (ch == '^') {
581 ch = *str++;
582 if (ch == '?')
583 value |= 0177;
584 else
585 value |= ch & 037;
586 do_putchar(value);
587 continue;
588 }
589
590 /* Finally test for sequences valid in the format string */
591 str = conv_escape(str - 1, &c);
592 do_putchar(c);
593 }
594}
595
596/*
597 * Print "standard" escape characters
598 */
599static char *
600conv_escape(char *str, char *conv_ch)
601{
602 int value;
603 int ch;
604 char num_buf[4], *num_end;
605
606 ch = *str++;
607
608 switch (ch) {
609 case '0': case '1': case '2': case '3':
610 case '4': case '5': case '6': case '7':
611 num_buf[0] = ch;
612 ch = str[0];
613 num_buf[1] = ch;
614 num_buf[2] = ch ? str[1] : 0;
615 num_buf[3] = 0;
616 value = strtoul(num_buf, &num_end, 8);
617 str += num_end - (num_buf + 1);
618 break;
619
620 case 'x':
621 /* Hexadecimal character constants are not required to be
622 supported (by SuS v1) because there is no consistent
623 way to detect the end of the constant.
624 Supporting 2 byte constants is a compromise. */
625 ch = str[0];
626 num_buf[0] = ch;
627 num_buf[1] = ch ? str[1] : 0;
628 num_buf[2] = 0;
629 value = strtoul(num_buf, &num_end, 16);
630 str += num_end - num_buf;
631 break;
632
633 case '\\': value = '\\'; break; /* backslash */
634 case '\'': value = '\''; break; /* single quote */
635 case '"': value = '"'; break; /* double quote */
636 case 'a': value = '\a'; break; /* alert */
637 case 'b': value = '\b'; break; /* backspace */
638 case 'e': value = ESCAPE; break; /* escape */
639 case 'f': value = '\f'; break; /* form-feed */
640 case 'n': value = '\n'; break; /* newline */
641 case 'r': value = '\r'; break; /* carriage-return */
642 case 't': value = '\t'; break; /* tab */
643 case 'v': value = '\v'; break; /* vertical-tab */
644
645 default:
646 warnx("unknown escape sequence `\\%c'", ch);
647 rval = 1;
648 value = ch;
649 break;
650 }
651
652 *conv_ch = value;
653 return str;
654}
655
656/* expand a string so that everything is printable */
657
658static char *
659conv_expand(const char *str)
660{
661 static char *conv_str;
662 static char no_memory[] = "<no memory>";
663 char *cp;
664 int ch;
665
666 if (conv_str)
667 free(conv_str);
668 /* get a buffer that is definitely large enough.... */
669 conv_str = malloc(4 * strlen(str) + 1);
670 if (!conv_str)
671 return no_memory;
672 cp = conv_str;
673
674 while ((ch = *(const unsigned char *)str++) != '\0') {
675 switch (ch) {
676 /* Use C escapes for expected control characters */
677 case '\\': ch = '\\'; break; /* backslash */
678 case '\'': ch = '\''; break; /* single quote */
679 case '"': ch = '"'; break; /* double quote */
680 case '\a': ch = 'a'; break; /* alert */
681 case '\b': ch = 'b'; break; /* backspace */
682 case ESCAPE: ch = 'e'; break; /* escape */
683 case '\f': ch = 'f'; break; /* form-feed */
684 case '\n': ch = 'n'; break; /* newline */
685 case '\r': ch = 'r'; break; /* carriage-return */
686 case '\t': ch = 't'; break; /* tab */
687 case '\v': ch = 'v'; break; /* vertical-tab */
688 default:
689 /* Copy anything printable */
690 if (isprint(ch)) {
691 *cp++ = ch;
692 continue;
693 }
694 /* Use vis(3) encodings for the rest */
695 *cp++ = '\\';
696 if (ch & 0200) {
697 *cp++ = 'M';
698 ch &= ~0200;
699 }
700 if (ch == 0177) {
701 *cp++ = '^';
702 *cp++ = '?';
703 continue;
704 }
705 if (ch < 040) {
706 *cp++ = '^';
707 *cp++ = ch | 0100;
708 continue;
709 }
710 *cp++ = '-';
711 *cp++ = ch;
712 continue;
713 }
714 *cp++ = '\\';
715 *cp++ = ch;
716 }
717
718 *cp = 0;
719 return conv_str;
720}
721
722static char *
723mklong(const char *str, int ch)
724{
725 static char copy[64];
726 size_t len;
727
728 len = strlen(str) - 1;
729 if (len > sizeof(copy) - 5) {
730 warnx("format %s too complex\n", str);
731 len = 4;
732 }
733 (void)memmove(copy, str, len);
734#ifndef _MSC_VER
735 copy[len++] = 'j';
736#else
737 copy[len++] = 'I';
738 copy[len++] = '6';
739 copy[len++] = '4';
740#endif
741 copy[len++] = ch;
742 copy[len] = '\0';
743 return copy;
744}
745
746static int
747getchr(void)
748{
749 if (!*gargv)
750 return 0;
751 return (int)**gargv++;
752}
753
754static char *
755getstr(void)
756{
757 static char empty[] = "";
758 if (!*gargv)
759 return empty;
760 return *gargv++;
761}
762
763static int
764getwidth(void)
765{
766 long val;
767 char *s, *ep;
768
769 s = *gargv;
770 if (!*gargv)
771 return (0);
772 gargv++;
773
774 errno = 0;
775 val = strtoul(s, &ep, 0);
776 check_conversion(s, ep);
777
778 /* Arbitrarily 'restrict' field widths to 1Mbyte */
779 if (val < 0 || val > 1 << 20) {
780 warnx("%s: invalid field width", s);
781 return 0;
782 }
783
784 return val;
785}
786
787static intmax_t
788getintmax(void)
789{
790 intmax_t val;
791 char *cp, *ep;
792
793 cp = *gargv;
794 if (cp == NULL)
795 return 0;
796 gargv++;
797
798 if (*cp == '\"' || *cp == '\'')
799 return *(cp+1);
800
801 errno = 0;
802 val = strtoimax(cp, &ep, 0);
803 check_conversion(cp, ep);
804 return val;
805}
806
807static uintmax_t
808getuintmax(void)
809{
810 uintmax_t val;
811 char *cp, *ep;
812
813 cp = *gargv;
814 if (cp == NULL)
815 return 0;
816 gargv++;
817
818 if (*cp == '\"' || *cp == '\'')
819 return *(cp + 1);
820
821 /* strtoumax won't error -ve values */
822 while (isspace(*(unsigned char *)cp))
823 cp++;
824 if (*cp == '-') {
825 warnx("%s: expected positive numeric value", cp);
826 rval = 1;
827 return 0;
828 }
829
830 errno = 0;
831 val = strtoumax(cp, &ep, 0);
832 check_conversion(cp, ep);
833 return val;
834}
835
836static double
837getdouble(void)
838{
839 double val;
840 char *ep;
841
842 if (!*gargv)
843 return (0.0);
844
845 if (**gargv == '\"' || **gargv == '\'')
846 return (double) *((*gargv++)+1);
847
848 errno = 0;
849 val = strtod(*gargv, &ep);
850 check_conversion(*gargv++, ep);
851 return val;
852}
853
854static void
855check_conversion(const char *s, const char *ep)
856{
857 if (*ep) {
858 if (ep == s)
859 warnx("%s: expected numeric value", s);
860 else
861 warnx("%s: not completely converted", s);
862 rval = 1;
863 } else if (errno == ERANGE) {
864 warnx("%s: %s", s, strerror(ERANGE));
865 rval = 1;
866 }
867}
868
869static int
870usage(FILE *pf)
871{
872 fprintf(pf, "usage: %s format [arg ...]\n"
873 " or: %s --help\n"
874 " or: %s --version\n",
875 g_progname, g_progname, g_progname);
876 return 1;
877}
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