1/*	$OpenBSD: gen_subs.c,v 1.19 2007/04/04 21:55:10 millert Exp $	*/
2/*	$NetBSD: gen_subs.c,v 1.5 1995/03/21 09:07:26 cgd Exp $	*/
3
4/*-
5 * Copyright (c) 1992 Keith Muller.
6 * Copyright (c) 1992, 1993
7 *	The Regents of the University of California.  All rights reserved.
8 *
9 * This code is derived from software contributed to Berkeley by
10 * Keith Muller of the University of California, San Diego.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 *    notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 *    notice, this list of conditions and the following disclaimer in the
19 *    documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 *    may be used to endorse or promote products derived from this software
22 *    without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37#ifndef lint
38#if 0
39static const char sccsid[] = "@(#)gen_subs.c	8.1 (Berkeley) 5/31/93";
40#else
41static const char rcsid[] = "$OpenBSD: gen_subs.c,v 1.19 2007/04/04 21:55:10 millert Exp $";
42#endif
43#endif /* not lint */
44
45#include <sys/types.h>
46#include <sys/time.h>
47#include <sys/stat.h>
48#include <sys/param.h>
49#include <stdio.h>
50#include <tzfile.h>
51#include <unistd.h>
52#include <stdlib.h>
53#include <string.h>
54#include <vis.h>
55#include <langinfo.h>
56#include "pax.h"
57#include "extern.h"
58
59/*
60 * a collection of general purpose subroutines used by pax
61 */
62
63/*
64 * constants used by ls_list() when printing out archive members
65 */
66#define MODELEN 20
67#define DATELEN 64
68#define SIXMONTHS	 ((DAYSPERNYEAR / 2) * SECSPERDAY)
69#define CURFRMTM	"%b %e %H:%M"
70#define OLDFRMTM	"%b %e  %Y"
71#define CURFRMTD	"%e %b %H:%M"
72#define OLDFRMTD	"%e %b  %Y"
73#define NAME_WIDTH	8
74
75static int d_first = -1;
76
77/*
78 * ls_list()
79 *	list the members of an archive in ls format
80 */
81
82void
83ls_list(ARCHD *arcn, time_t now, FILE *fp)
84{
85	struct stat *sbp;
86	char f_mode[MODELEN];
87	char f_date[DATELEN];
88	const char *timefrmt;
89	int term;
90
91	term = zeroflag ? '\0' : '\n';	/* path termination character */
92
93	/*
94	 * if not verbose, just print the file name
95	 */
96	if (!vflag) {
97		if (zeroflag)
98			(void)fputs(arcn->name, fp);
99		else
100			safe_print(arcn->name, fp);
101		(void)putc(term, fp);
102		(void)fflush(fp);
103		return;
104	}
105
106	if (pax_list_opt_format) {
107		pax_format_list_output(arcn, now, fp, term);
108		return;
109	}
110
111	if (d_first < 0)
112		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
113	/*
114	 * user wants long mode
115	 */
116	sbp = &(arcn->sb);
117	strmode(sbp->st_mode, f_mode);
118
119	/*
120	 * time format based on age compared to the time pax was started.
121	 */
122	if ((sbp->st_mtime + SIXMONTHS) <= now ||
123		sbp->st_mtime > now)
124		timefrmt = d_first ? OLDFRMTD : OLDFRMTM;
125	else
126		timefrmt = d_first ? CURFRMTD : CURFRMTM;
127
128	/*
129	 * print file mode, link count, uid, gid and time
130	 */
131	if (strftime(f_date,DATELEN,timefrmt,localtime(&(sbp->st_mtime))) == 0)
132		f_date[0] = '\0';
133#define UT_NAMESIZE 8
134	(void)fprintf(fp, "%s%2u %-*.*s %-*.*s ", f_mode, sbp->st_nlink,
135		NAME_WIDTH, UT_NAMESIZE, name_uid(sbp->st_uid, 1),
136		NAME_WIDTH, UT_NAMESIZE, name_gid(sbp->st_gid, 1));
137
138	/*
139	 * print device id's for devices, or sizes for other nodes
140	 */
141	if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK))
142#		ifdef LONG_OFF_T
143		(void)fprintf(fp, "%4u,%4u ", MAJOR(sbp->st_rdev),
144#		else
145		(void)fprintf(fp, "%4lu,%4lu ", (unsigned long)MAJOR(sbp->st_rdev),
146#		endif
147		    (unsigned long)MINOR(sbp->st_rdev));
148	else {
149#		ifdef LONG_OFF_T
150		(void)fprintf(fp, "%9lu ", sbp->st_size);
151#		else
152		(void)fprintf(fp, "%9qu ", sbp->st_size);
153#		endif
154	}
155
156	/*
157	 * print name and link info for hard and soft links
158	 */
159	(void)fputs(f_date, fp);
160	(void)putc(' ', fp);
161	safe_print(arcn->name, fp);
162	if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG)) {
163		fputs(" == ", fp);
164		safe_print(arcn->ln_name, fp);
165	} else if (arcn->type == PAX_SLK) {
166		fputs(" -> ", fp);
167		safe_print(arcn->ln_name, fp);
168	}
169	(void)putc(term, fp);
170	(void)fflush(fp);
171	return;
172}
173
174/*
175 * tty_ls()
176 *	print a short summary of file to tty.
177 */
178
179void
180ls_tty(ARCHD *arcn)
181{
182	char f_date[DATELEN];
183	char f_mode[MODELEN];
184	const char *timefrmt;
185
186	if (d_first < 0)
187		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
188
189	if ((arcn->sb.st_mtime + SIXMONTHS) <= time(NULL))
190		timefrmt = d_first ? OLDFRMTD : OLDFRMTM;
191	else
192		timefrmt = d_first ? CURFRMTD : CURFRMTM;
193
194	/*
195	 * convert time to string, and print
196	 */
197	if (strftime(f_date, DATELEN, timefrmt,
198	    localtime(&(arcn->sb.st_mtime))) == 0)
199		f_date[0] = '\0';
200	strmode(arcn->sb.st_mode, f_mode);
201	tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
202	return;
203}
204
205void
206safe_print(const char *str, FILE *fp)
207{
208	char visbuf[5];
209	const char *cp;
210
211	/*
212	 * if printing to a tty, use vis(3) to print special characters.
213	 */
214	if (isatty(fileno(fp))) {
215		for (cp = str; *cp; cp++) {
216			(void)vis(visbuf, cp[0], VIS_CSTYLE, cp[1]);
217			(void)fputs(visbuf, fp);
218		}
219	} else {
220		(void)fputs(str, fp);
221	}
222}
223
224/*
225 * asc_ul()
226 *	convert hex/octal character string into a u_long. We do not have to
227 *	check for overflow! (the headers in all supported formats are not large
228 *	enough to create an overflow).
229 *	NOTE: strings passed to us are NOT TERMINATED.
230 * Return:
231 *	unsigned long value
232 */
233
234u_long
235asc_ul(char *str, int len, int base)
236{
237	char *stop;
238	u_long tval = 0;
239
240	stop = str + len;
241
242	/*
243	 * skip over leading blanks and zeros
244	 */
245	while ((str < stop) && ((*str == ' ') || (*str == '0')))
246		++str;
247
248	/*
249	 * for each valid digit, shift running value (tval) over to next digit
250	 * and add next digit
251	 */
252	if (base == HEX) {
253		while (str < stop) {
254			if ((*str >= '0') && (*str <= '9'))
255				tval = (tval << 4) + (*str++ - '0');
256			else if ((*str >= 'A') && (*str <= 'F'))
257				tval = (tval << 4) + 10 + (*str++ - 'A');
258			else if ((*str >= 'a') && (*str <= 'f'))
259				tval = (tval << 4) + 10 + (*str++ - 'a');
260			else
261				break;
262		}
263	} else {
264		while ((str < stop) && (*str >= '0') && (*str <= '7'))
265			tval = (tval << 3) + (*str++ - '0');
266	}
267	return(tval);
268}
269
270/*
271 * ul_asc()
272 *	convert an unsigned long into an hex/oct ascii string. pads with LEADING
273 *	ascii 0's to fill string completely
274 *	NOTE: the string created is NOT TERMINATED.
275 */
276
277int
278ul_asc(u_long val, char *str, int len, int base)
279{
280	char *pt;
281	u_long digit;
282
283	/*
284	 * WARNING str is not '\0' terminated by this routine
285	 */
286	pt = str + len - 1;
287
288	/*
289	 * do a tailwise conversion (start at right most end of string to place
290	 * least significant digit). Keep shifting until conversion value goes
291	 * to zero (all digits were converted)
292	 */
293	if (base == HEX) {
294		while (pt >= str) {
295			if ((digit = (val & 0xf)) < 10)
296				*pt-- = '0' + (char)digit;
297			else
298				*pt-- = 'a' + (char)(digit - 10);
299			if ((val = (val >> 4)) == (u_long)0)
300				break;
301		}
302	} else {
303		while (pt >= str) {
304			*pt-- = '0' + (char)(val & 0x7);
305			if ((val = (val >> 3)) == (u_long)0)
306				break;
307		}
308	}
309
310	/*
311	 * pad with leading ascii ZEROS. We return -1 if we ran out of space.
312	 */
313	while (pt >= str)
314		*pt-- = '0';
315	if (val != (u_long)0)
316		return(-1);
317	return(0);
318}
319
320#ifndef LONG_OFF_T
321/*
322 * asc_uqd()
323 *	convert hex/octal character string into a u_quad_t. We do not have to
324 *	check for overflow! (the headers in all supported formats are not large
325 *	enough to create an overflow).
326 *	NOTE: strings passed to us are NOT TERMINATED.
327 * Return:
328 *	u_quad_t value
329 */
330
331u_quad_t
332asc_uqd(char *str, int len, int base)
333{
334	char *stop;
335	u_quad_t tval = 0;
336
337	stop = str + len;
338
339	/*
340	 * skip over leading blanks and zeros
341	 */
342	while ((str < stop) && ((*str == ' ') || (*str == '0')))
343		++str;
344
345	/*
346	 * for each valid digit, shift running value (tval) over to next digit
347	 * and add next digit
348	 */
349	if (base == HEX) {
350		while (str < stop) {
351			if ((*str >= '0') && (*str <= '9'))
352				tval = (tval << 4) + (*str++ - '0');
353			else if ((*str >= 'A') && (*str <= 'F'))
354				tval = (tval << 4) + 10 + (*str++ - 'A');
355			else if ((*str >= 'a') && (*str <= 'f'))
356				tval = (tval << 4) + 10 + (*str++ - 'a');
357			else
358				break;
359		}
360	} else {
361		while ((str < stop) && (*str >= '0') && (*str <= '7'))
362			tval = (tval << 3) + (*str++ - '0');
363	}
364	return(tval);
365}
366
367/*
368 * uqd_asc()
369 *	convert an u_quad_t into a hex/oct ascii string. pads with LEADING
370 *	ascii 0's to fill string completely
371 *	NOTE: the string created is NOT TERMINATED.
372 */
373
374int
375uqd_asc(u_quad_t val, char *str, int len, int base)
376{
377	char *pt;
378	u_quad_t digit;
379
380	/*
381	 * WARNING str is not '\0' terminated by this routine
382	 */
383	pt = str + len - 1;
384
385	/*
386	 * do a tailwise conversion (start at right most end of string to place
387	 * least significant digit). Keep shifting until conversion value goes
388	 * to zero (all digits were converted)
389	 */
390	if (base == HEX) {
391		while (pt >= str) {
392			if ((digit = (val & 0xf)) < 10)
393				*pt-- = '0' + (char)digit;
394			else
395				*pt-- = 'a' + (char)(digit - 10);
396			if ((val = (val >> 4)) == (u_quad_t)0)
397				break;
398		}
399	} else {
400		while (pt >= str) {
401			*pt-- = '0' + (char)(val & 0x7);
402			if ((val = (val >> 3)) == (u_quad_t)0)
403				break;
404		}
405	}
406
407	/*
408	 * pad with leading ascii ZEROS. We return -1 if we ran out of space.
409	 */
410	while (pt >= str)
411		*pt-- = '0';
412	if (val != (u_quad_t)0)
413		return(-1);
414	return(0);
415}
416#endif
417
418/*
419 * Copy at max min(bufz, fieldsz) chars from field to buf, stopping
420 * at the first NUL char. NUL terminate buf if there is room left.
421 */
422size_t
423fieldcpy(char *buf, size_t bufsz, const char *field, size_t fieldsz)
424{
425	char *p = buf;
426	const char *q = field;
427	size_t i = 0;
428
429	if (fieldsz > bufsz)
430		fieldsz = bufsz;
431	while (i < fieldsz && *q != '\0') {
432		*p++ = *q++;
433		i++;
434	}
435	if (i < bufsz)
436		*p = '\0';
437	return(i);
438}
439