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#include <sys/cdefs.h>
38#ifndef lint
39#if 0
40static const char sccsid[] = "@(#)gen_subs.c	8.1 (Berkeley) 5/31/93";
41#else
42__used static const char rcsid[] = "$OpenBSD: gen_subs.c,v 1.19 2007/04/04 21:55:10 millert Exp $";
43#endif
44#endif /* not lint */
45
46#include <sys/types.h>
47#include <sys/time.h>
48#include <sys/stat.h>
49#include <sys/param.h>
50#include <stdio.h>
51#include <tzfile.h>
52#include <unistd.h>
53#include <stdlib.h>
54#include <string.h>
55#include <vis.h>
56#include <langinfo.h>
57#include "pax.h"
58#include "extern.h"
59
60/*
61 * a collection of general purpose subroutines used by pax
62 */
63
64/*
65 * constants used by ls_list() when printing out archive members
66 */
67#define MODELEN 20
68#define DATELEN 64
69#define SIXMONTHS	 ((DAYSPERNYEAR / 2) * SECSPERDAY)
70#define CURFRMTM	"%b %e %H:%M"
71#define OLDFRMTM	"%b %e  %Y"
72#define CURFRMTD	"%e %b %H:%M"
73#define OLDFRMTD	"%e %b  %Y"
74#define NAME_WIDTH	8
75
76static int d_first = -1;
77
78/*
79 * ls_list()
80 *	list the members of an archive in ls format
81 */
82
83void
84ls_list(ARCHD *arcn, time_t now, FILE *fp)
85{
86	struct stat *sbp;
87	char f_mode[MODELEN];
88	char f_date[DATELEN];
89	const char *timefrmt;
90	int term;
91
92	term = zeroflag ? '\0' : '\n';	/* path termination character */
93
94	/*
95	 * if not verbose, just print the file name
96	 */
97	if (!vflag) {
98		if (zeroflag)
99			(void)fputs(arcn->name, fp);
100		else
101			safe_print(arcn->name, fp);
102		(void)putc(term, fp);
103		(void)fflush(fp);
104		return;
105	}
106
107	if (pax_list_opt_format) {
108		pax_format_list_output(arcn, now, fp, term);
109		return;
110	}
111
112	if (d_first < 0)
113		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
114	/*
115	 * user wants long mode
116	 */
117	sbp = &(arcn->sb);
118	strmode(sbp->st_mode, f_mode);
119
120	/*
121	 * time format based on age compared to the time pax was started.
122	 */
123	if ((sbp->st_mtime + SIXMONTHS) <= now ||
124		sbp->st_mtime > now)
125		timefrmt = d_first ? OLDFRMTD : OLDFRMTM;
126	else
127		timefrmt = d_first ? CURFRMTD : CURFRMTM;
128
129	/*
130	 * print file mode, link count, uid, gid and time
131	 */
132	if (strftime(f_date,DATELEN,timefrmt,localtime(&(sbp->st_mtime))) == 0)
133		f_date[0] = '\0';
134#define UT_NAMESIZE 8
135	(void)fprintf(fp, "%s%2u %-*.*s %-*.*s ", f_mode, sbp->st_nlink,
136		NAME_WIDTH, UT_NAMESIZE, name_uid(sbp->st_uid, 1),
137		NAME_WIDTH, UT_NAMESIZE, name_gid(sbp->st_gid, 1));
138
139	/*
140	 * print device id's for devices, or sizes for other nodes
141	 */
142	if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK))
143#		ifdef LONG_OFF_T
144		(void)fprintf(fp, "%4u,%4u ", MAJOR(sbp->st_rdev),
145#		else
146		(void)fprintf(fp, "%4lu,%4lu ", (unsigned long)MAJOR(sbp->st_rdev),
147#		endif
148		    (unsigned long)MINOR(sbp->st_rdev));
149	else {
150#		ifdef LONG_OFF_T
151		(void)fprintf(fp, "%9lu ", sbp->st_size);
152#		else
153		(void)fprintf(fp, "%9qu ", sbp->st_size);
154#		endif
155	}
156
157	/*
158	 * print name and link info for hard and soft links
159	 */
160	(void)fputs(f_date, fp);
161	(void)putc(' ', fp);
162	safe_print(arcn->name, fp);
163	if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG)) {
164		fputs(" == ", fp);
165		safe_print(arcn->ln_name, fp);
166	} else if (arcn->type == PAX_SLK) {
167		fputs(" -> ", fp);
168		safe_print(arcn->ln_name, fp);
169	}
170	(void)putc(term, fp);
171	(void)fflush(fp);
172	return;
173}
174
175/*
176 * tty_ls()
177 *	print a short summary of file to tty.
178 */
179
180void
181ls_tty(ARCHD *arcn)
182{
183	char f_date[DATELEN];
184	char f_mode[MODELEN];
185	const char *timefrmt;
186
187	if (d_first < 0)
188		d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
189
190	if ((arcn->sb.st_mtime + SIXMONTHS) <= time(NULL))
191		timefrmt = d_first ? OLDFRMTD : OLDFRMTM;
192	else
193		timefrmt = d_first ? CURFRMTD : CURFRMTM;
194
195	/*
196	 * convert time to string, and print
197	 */
198	if (strftime(f_date, DATELEN, timefrmt,
199	    localtime(&(arcn->sb.st_mtime))) == 0)
200		f_date[0] = '\0';
201	strmode(arcn->sb.st_mode, f_mode);
202	tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
203	return;
204}
205
206void
207safe_print(const char *str, FILE *fp)
208{
209	char visbuf[5];
210	const char *cp;
211
212	/*
213	 * if printing to a tty, use vis(3) to print special characters.
214	 */
215	if (isatty(fileno(fp))) {
216		for (cp = str; *cp; cp++) {
217			(void)vis(visbuf, cp[0], VIS_CSTYLE, cp[1]);
218			(void)fputs(visbuf, fp);
219		}
220	} else {
221		(void)fputs(str, fp);
222	}
223}
224
225/*
226 * asc_ul()
227 *	convert hex/octal character string into a u_long. We do not have to
228 *	check for overflow! (the headers in all supported formats are not large
229 *	enough to create an overflow).
230 *	NOTE: strings passed to us are NOT TERMINATED.
231 * Return:
232 *	unsigned long value
233 */
234
235u_long
236asc_ul(char *str, int len, int base)
237{
238	char *stop;
239	u_long tval = 0;
240
241	stop = str + len;
242
243	/*
244	 * skip over leading blanks and zeros
245	 */
246	while ((str < stop) && ((*str == ' ') || (*str == '0')))
247		++str;
248
249	/*
250	 * for each valid digit, shift running value (tval) over to next digit
251	 * and add next digit
252	 */
253	if (base == HEX) {
254		while (str < stop) {
255			if ((*str >= '0') && (*str <= '9'))
256				tval = (tval << 4) + (*str++ - '0');
257			else if ((*str >= 'A') && (*str <= 'F'))
258				tval = (tval << 4) + 10 + (*str++ - 'A');
259			else if ((*str >= 'a') && (*str <= 'f'))
260				tval = (tval << 4) + 10 + (*str++ - 'a');
261			else
262				break;
263		}
264	} else {
265		while ((str < stop) && (*str >= '0') && (*str <= '7'))
266			tval = (tval << 3) + (*str++ - '0');
267	}
268	return(tval);
269}
270
271/*
272 * ul_asc()
273 *	convert an unsigned long into an hex/oct ascii string. pads with LEADING
274 *	ascii 0's to fill string completely
275 *	NOTE: the string created is NOT TERMINATED.
276 */
277
278int
279ul_asc(u_long val, char *str, int len, int base)
280{
281	char *pt;
282	u_long digit;
283
284	/*
285	 * WARNING str is not '\0' terminated by this routine
286	 */
287	pt = str + len - 1;
288
289	/*
290	 * do a tailwise conversion (start at right most end of string to place
291	 * least significant digit). Keep shifting until conversion value goes
292	 * to zero (all digits were converted)
293	 */
294	if (base == HEX) {
295		while (pt >= str) {
296			if ((digit = (val & 0xf)) < 10)
297				*pt-- = '0' + (char)digit;
298			else
299				*pt-- = 'a' + (char)(digit - 10);
300			if ((val = (val >> 4)) == (u_long)0)
301				break;
302		}
303	} else {
304		while (pt >= str) {
305			*pt-- = '0' + (char)(val & 0x7);
306			if ((val = (val >> 3)) == (u_long)0)
307				break;
308		}
309	}
310
311	/*
312	 * pad with leading ascii ZEROS. We return -1 if we ran out of space.
313	 */
314	while (pt >= str)
315		*pt-- = '0';
316	if (val != (u_long)0)
317		return(-1);
318	return(0);
319}
320
321#ifndef LONG_OFF_T
322/*
323 * asc_uqd()
324 *	convert hex/octal character string into a u_quad_t. We do not have to
325 *	check for overflow! (the headers in all supported formats are not large
326 *	enough to create an overflow).
327 *	NOTE: strings passed to us are NOT TERMINATED.
328 * Return:
329 *	u_quad_t value
330 */
331
332u_quad_t
333asc_uqd(char *str, int len, int base)
334{
335	char *stop;
336	u_quad_t tval = 0;
337
338	stop = str + len;
339
340	/*
341	 * skip over leading blanks and zeros
342	 */
343	while ((str < stop) && ((*str == ' ') || (*str == '0')))
344		++str;
345
346	/*
347	 * for each valid digit, shift running value (tval) over to next digit
348	 * and add next digit
349	 */
350	if (base == HEX) {
351		while (str < stop) {
352			if ((*str >= '0') && (*str <= '9'))
353				tval = (tval << 4) + (*str++ - '0');
354			else if ((*str >= 'A') && (*str <= 'F'))
355				tval = (tval << 4) + 10 + (*str++ - 'A');
356			else if ((*str >= 'a') && (*str <= 'f'))
357				tval = (tval << 4) + 10 + (*str++ - 'a');
358			else
359				break;
360		}
361	} else {
362		while ((str < stop) && (*str >= '0') && (*str <= '7'))
363			tval = (tval << 3) + (*str++ - '0');
364	}
365	return(tval);
366}
367
368/*
369 * uqd_asc()
370 *	convert an u_quad_t into a hex/oct ascii string. pads with LEADING
371 *	ascii 0's to fill string completely
372 *	NOTE: the string created is NOT TERMINATED.
373 */
374
375int
376uqd_asc(u_quad_t val, char *str, int len, int base)
377{
378	char *pt;
379	u_quad_t digit;
380
381	/*
382	 * WARNING str is not '\0' terminated by this routine
383	 */
384	pt = str + len - 1;
385
386	/*
387	 * do a tailwise conversion (start at right most end of string to place
388	 * least significant digit). Keep shifting until conversion value goes
389	 * to zero (all digits were converted)
390	 */
391	if (base == HEX) {
392		while (pt >= str) {
393			if ((digit = (val & 0xf)) < 10)
394				*pt-- = '0' + (char)digit;
395			else
396				*pt-- = 'a' + (char)(digit - 10);
397			if ((val = (val >> 4)) == (u_quad_t)0)
398				break;
399		}
400	} else {
401		while (pt >= str) {
402			*pt-- = '0' + (char)(val & 0x7);
403			if ((val = (val >> 3)) == (u_quad_t)0)
404				break;
405		}
406	}
407
408	/*
409	 * pad with leading ascii ZEROS. We return -1 if we ran out of space.
410	 */
411	while (pt >= str)
412		*pt-- = '0';
413	if (val != (u_quad_t)0)
414		return(-1);
415	return(0);
416}
417#endif
418
419/*
420 * Copy at max min(bufz, fieldsz) chars from field to buf, stopping
421 * at the first NUL char. NUL terminate buf if there is room left.
422 */
423size_t
424fieldcpy(char *buf, size_t bufsz, const char *field, size_t fieldsz)
425{
426	char *p = buf;
427	const char *q = field;
428	size_t i = 0;
429
430	if (fieldsz > bufsz)
431		fieldsz = bufsz;
432	while (i < fieldsz && *q != '\0') {
433		*p++ = *q++;
434		i++;
435	}
436	if (i < bufsz)
437		*p = '\0';
438	return(i);
439}
440