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gen_subs.c revision 1.7 
      1 /*	$NetBSD: gen_subs.c,v 1.7 1997/07/20 20:32:32 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1992 Keith Muller.
      5  * Copyright (c) 1992, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * Keith Muller of the University of California, San Diego.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Berkeley and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  */
     39 
     40 #include <sys/cdefs.h>
     41 #ifndef lint
     42 #if 0
     43 static char sccsid[] = "@(#)gen_subs.c	8.1 (Berkeley) 5/31/93";
     44 #else
     45 __RCSID("$NetBSD: gen_subs.c,v 1.7 1997/07/20 20:32:32 christos Exp $");
     46 #endif
     47 #endif /* not lint */
     48 
     49 #include <sys/types.h>
     50 #include <sys/time.h>
     51 #include <sys/stat.h>
     52 #include <sys/param.h>
     53 #include <stdio.h>
     54 #include <ctype.h>
     55 #include <tzfile.h>
     56 #include <utmp.h>
     57 #include <unistd.h>
     58 #include <stdlib.h>
     59 #include <string.h>
     60 #include "pax.h"
     61 #include "extern.h"
     62 
     63 /*
     64  * a collection of general purpose subroutines used by pax
     65  */
     66 
     67 /*
     68  * constants used by ls_list() when printing out archive members
     69  */
     70 #define MODELEN 20
     71 #define DATELEN 64
     72 #define SIXMONTHS	 ((DAYSPERNYEAR / 2) * SECSPERDAY)
     73 #define CURFRMT		"%b %e %H:%M"
     74 #define OLDFRMT		"%b %e  %Y"
     75 #ifndef UT_NAMESIZE
     76 #define UT_NAMESIZE	8
     77 #endif
     78 #define UT_GRPSIZE	6
     79 
     80 /*
     81  * ls_list()
     82  *	list the members of an archive in ls format
     83  */
     84 
     85 #if __STDC__
     86 void
     87 ls_list(ARCHD *arcn, time_t now)
     88 #else
     89 void
     90 ls_list(arcn, now)
     91 	ARCHD *arcn;
     92 	time_t now;
     93 #endif
     94 {
     95 	struct stat *sbp;
     96 	char f_mode[MODELEN];
     97 	char f_date[DATELEN];
     98 	char *timefrmt;
     99 
    100 	/*
    101 	 * if not verbose, just print the file name
    102 	 */
    103 	if (!vflag) {
    104 		(void)printf("%s\n", arcn->name);
    105 		(void)fflush(stdout);
    106 		return;
    107 	}
    108 
    109 	/*
    110 	 * user wants long mode
    111 	 */
    112 	sbp = &(arcn->sb);
    113 	strmode(sbp->st_mode, f_mode);
    114 
    115 	if (ltmfrmt == NULL) {
    116 		/*
    117 		 * no locale specified format. time format based on age
    118 		 * compared to the time pax was started.
    119 		 */
    120 		if ((sbp->st_mtime + SIXMONTHS) <= now)
    121 			timefrmt = OLDFRMT;
    122 		else
    123 			timefrmt = CURFRMT;
    124 	} else
    125 		timefrmt = ltmfrmt;
    126 
    127 	/*
    128 	 * print file mode, link count, uid, gid and time
    129 	 */
    130 	if (strftime(f_date,DATELEN,timefrmt,localtime(&(sbp->st_mtime))) == 0)
    131 		f_date[0] = '\0';
    132 	(void)printf("%s%2u %-*s %-*s ", f_mode, sbp->st_nlink, UT_NAMESIZE,
    133 		name_uid(sbp->st_uid, 1), UT_GRPSIZE,
    134 		name_gid(sbp->st_gid, 1));
    135 
    136 	/*
    137 	 * print device id's for devices, or sizes for other nodes
    138 	 */
    139 	if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK))
    140 #		ifdef NET2_STAT
    141 		(void)printf("%4u,%4u ", MAJOR(sbp->st_rdev),
    142 		    MINOR(sbp->st_rdev));
    143 #		else
    144 		(void)printf("%4lu,%4lu ", (long) MAJOR(sbp->st_rdev),
    145 		    (long) MINOR(sbp->st_rdev));
    146 #		endif
    147 	else {
    148 #		ifdef NET2_STAT
    149 		(void)printf("%9lu ", sbp->st_size);
    150 #		else
    151 		(void)printf("%9qu ", sbp->st_size);
    152 #		endif
    153 	}
    154 
    155 	/*
    156 	 * print name and link info for hard and soft links
    157 	 */
    158 	(void)printf("%s %s", f_date, arcn->name);
    159 	if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG))
    160 		(void)printf(" == %s\n", arcn->ln_name);
    161 	else if (arcn->type == PAX_SLK)
    162 		(void)printf(" => %s\n", arcn->ln_name);
    163 	else
    164 		(void)putchar('\n');
    165 	(void)fflush(stdout);
    166 	return;
    167 }
    168 
    169 /*
    170  * tty_ls()
    171  * 	print a short summary of file to tty.
    172  */
    173 
    174 #if __STDC__
    175 void
    176 ls_tty(ARCHD *arcn)
    177 #else
    178 void
    179 ls_tty(arcn)
    180 	ARCHD *arcn;
    181 #endif
    182 {
    183 	char f_date[DATELEN];
    184 	char f_mode[MODELEN];
    185 	char *timefrmt;
    186 
    187 	if (ltmfrmt == NULL) {
    188 		/*
    189 		 * no locale specified format
    190 		 */
    191 		if ((arcn->sb.st_mtime + SIXMONTHS) <= time((time_t *)NULL))
    192 			timefrmt = OLDFRMT;
    193 		else
    194 			timefrmt = CURFRMT;
    195 	} else
    196 		timefrmt = ltmfrmt;
    197 
    198 	/*
    199 	 * convert time to string, and print
    200 	 */
    201 	if (strftime(f_date, DATELEN, timefrmt,
    202 	    localtime(&(arcn->sb.st_mtime))) == 0)
    203 		f_date[0] = '\0';
    204 	strmode(arcn->sb.st_mode, f_mode);
    205 	tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
    206 	return;
    207 }
    208 
    209 /*
    210  * zf_strncpy()
    211  *	copy src to dest up to len chars (stopping at first '\0'), when src is
    212  *	shorter than len, pads to len with '\0'. big performance win (and
    213  *	a lot easier to code) over strncpy(), then a strlen() then a
    214  *	memset(). (or doing the memset() first).
    215  */
    216 
    217 #if __STDC__
    218 void
    219 zf_strncpy(char *dest, char *src, int len)
    220 #else
    221 void
    222 zf_strncpy(dest, src, len)
    223 	char *dest;
    224 	char *src;
    225 	int len;
    226 #endif
    227 {
    228 	char *stop;
    229 
    230 	stop = dest + len;
    231 	while ((dest < stop) && (*src != '\0'))
    232 		*dest++ = *src++;
    233 	while (dest < stop)
    234 		*dest++ = '\0';
    235 	return;
    236 }
    237 
    238 /*
    239  * l_strncpy()
    240  *	copy src to dest up to len chars (stopping at first '\0')
    241  * Return:
    242  *	number of chars copied. (Note this is a real performance win over
    243  *	doing a strncpy() then a strlen()
    244  */
    245 
    246 #if __STDC__
    247 int
    248 l_strncpy(char *dest, char *src, int len)
    249 #else
    250 int
    251 l_strncpy(dest, src, len)
    252 	char *dest;
    253 	char *src;
    254 	int len;
    255 #endif
    256 {
    257 	char *stop;
    258 	char *start;
    259 
    260 	stop = dest + len;
    261 	start = dest;
    262 	while ((dest < stop) && (*src != '\0'))
    263 		*dest++ = *src++;
    264 	if (dest < stop)
    265 		*dest = '\0';
    266 	return(dest - start);
    267 }
    268 
    269 /*
    270  * asc_ul()
    271  *	convert hex/octal character string into a u_long. We do not have to
    272  *	check for overflow! (the headers in all supported formats are not large
    273  *	enough to create an overflow).
    274  *	NOTE: strings passed to us are NOT TERMINATED.
    275  * Return:
    276  *	unsigned long value
    277  */
    278 
    279 #if __STDC__
    280 u_long
    281 asc_ul(char *str, int len, int base)
    282 #else
    283 u_long
    284 asc_ul(str, len, base)
    285 	char *str;
    286 	int len;
    287 	int base;
    288 #endif
    289 {
    290 	char *stop;
    291 	u_long tval = 0;
    292 
    293 	stop = str + len;
    294 
    295 	/*
    296 	 * skip over leading blanks and zeros
    297 	 */
    298 	while ((str < stop) && ((*str == ' ') || (*str == '0')))
    299 		++str;
    300 
    301 	/*
    302 	 * for each valid digit, shift running value (tval) over to next digit
    303 	 * and add next digit
    304 	 */
    305 	if (base == HEX) {
    306 		while (str < stop) {
    307 			if ((*str >= '0') && (*str <= '9'))
    308 				tval = (tval << 4) + (*str++ - '0');
    309 			else if ((*str >= 'A') && (*str <= 'F'))
    310 				tval = (tval << 4) + 10 + (*str++ - 'A');
    311 			else if ((*str >= 'a') && (*str <= 'f'))
    312 				tval = (tval << 4) + 10 + (*str++ - 'a');
    313 			else
    314 				break;
    315 		}
    316 	} else {
    317  		while ((str < stop) && (*str >= '0') && (*str <= '7'))
    318 			tval = (tval << 3) + (*str++ - '0');
    319 	}
    320 	return(tval);
    321 }
    322 
    323 /*
    324  * ul_asc()
    325  *	convert an unsigned long into an hex/oct ascii string. pads with LEADING
    326  *	ascii 0's to fill string completely
    327  *	NOTE: the string created is NOT TERMINATED.
    328  */
    329 
    330 #if __STDC__
    331 int
    332 ul_asc(u_long val, char *str, int len, int base)
    333 #else
    334 int
    335 ul_asc(val, str, len, base)
    336 	u_long val;
    337 	char *str;
    338 	int len;
    339 	int base;
    340 #endif
    341 {
    342 	char *pt;
    343 	u_long digit;
    344 
    345 	/*
    346 	 * WARNING str is not '\0' terminated by this routine
    347 	 */
    348 	pt = str + len - 1;
    349 
    350 	/*
    351 	 * do a tailwise conversion (start at right most end of string to place
    352 	 * least significant digit). Keep shifting until conversion value goes
    353 	 * to zero (all digits were converted)
    354 	 */
    355 	if (base == HEX) {
    356 		while (pt >= str) {
    357 			if ((digit = (val & 0xf)) < 10)
    358 				*pt-- = '0' + (char)digit;
    359 			else
    360 				*pt-- = 'a' + (char)(digit - 10);
    361 			if ((val = (val >> 4)) == (u_long)0)
    362 				break;
    363 		}
    364 	} else {
    365 		while (pt >= str) {
    366 			*pt-- = '0' + (char)(val & 0x7);
    367 			if ((val = (val >> 3)) == (u_long)0)
    368 				break;
    369 		}
    370 	}
    371 
    372 	/*
    373 	 * pad with leading ascii ZEROS. We return -1 if we ran out of space.
    374 	 */
    375 	while (pt >= str)
    376 		*pt-- = '0';
    377 	if (val != (u_long)0)
    378 		return(-1);
    379 	return(0);
    380 }
    381 
    382 #ifndef NET2_STAT
    383 /*
    384  * asc_uqd()
    385  *	convert hex/octal character string into a u_quad_t. We do not have to
    386  *	check for overflow! (the headers in all supported formats are not large
    387  *	enough to create an overflow).
    388  *	NOTE: strings passed to us are NOT TERMINATED.
    389  * Return:
    390  *	u_quad_t value
    391  */
    392 
    393 #if __STDC__
    394 u_quad_t
    395 asc_uqd(char *str, int len, int base)
    396 #else
    397 u_quad_t
    398 asc_uqd(str, len, base)
    399 	char *str;
    400 	int len;
    401 	int base;
    402 #endif
    403 {
    404 	char *stop;
    405 	u_quad_t tval = 0;
    406 
    407 	stop = str + len;
    408 
    409 	/*
    410 	 * skip over leading blanks and zeros
    411 	 */
    412 	while ((str < stop) && ((*str == ' ') || (*str == '0')))
    413 		++str;
    414 
    415 	/*
    416 	 * for each valid digit, shift running value (tval) over to next digit
    417 	 * and add next digit
    418 	 */
    419 	if (base == HEX) {
    420 		while (str < stop) {
    421 			if ((*str >= '0') && (*str <= '9'))
    422 				tval = (tval << 4) + (*str++ - '0');
    423 			else if ((*str >= 'A') && (*str <= 'F'))
    424 				tval = (tval << 4) + 10 + (*str++ - 'A');
    425 			else if ((*str >= 'a') && (*str <= 'f'))
    426 				tval = (tval << 4) + 10 + (*str++ - 'a');
    427 			else
    428 				break;
    429 		}
    430 	} else {
    431  		while ((str < stop) && (*str >= '0') && (*str <= '7'))
    432 			tval = (tval << 3) + (*str++ - '0');
    433 	}
    434 	return(tval);
    435 }
    436 
    437 /*
    438  * uqd_asc()
    439  *	convert an u_quad_t into a hex/oct ascii string. pads with LEADING
    440  *	ascii 0's to fill string completely
    441  *	NOTE: the string created is NOT TERMINATED.
    442  */
    443 
    444 #if __STDC__
    445 int
    446 uqd_asc(u_quad_t val, char *str, int len, int base)
    447 #else
    448 int
    449 uqd_asc(val, str, len, base)
    450 	u_quad_t val;
    451 	char *str;
    452 	int len;
    453 	int base;
    454 #endif
    455 {
    456 	char *pt;
    457 	u_quad_t digit;
    458 
    459 	/*
    460 	 * WARNING str is not '\0' terminated by this routine
    461 	 */
    462 	pt = str + len - 1;
    463 
    464 	/*
    465 	 * do a tailwise conversion (start at right most end of string to place
    466 	 * least significant digit). Keep shifting until conversion value goes
    467 	 * to zero (all digits were converted)
    468 	 */
    469 	if (base == HEX) {
    470 		while (pt >= str) {
    471 			if ((digit = (val & 0xf)) < 10)
    472 				*pt-- = '0' + (char)digit;
    473 			else
    474 				*pt-- = 'a' + (char)(digit - 10);
    475 			if ((val = (val >> 4)) == (u_quad_t)0)
    476 				break;
    477 		}
    478 	} else {
    479 		while (pt >= str) {
    480 			*pt-- = '0' + (char)(val & 0x7);
    481 			if ((val = (val >> 3)) == (u_quad_t)0)
    482 				break;
    483 		}
    484 	}
    485 
    486 	/*
    487 	 * pad with leading ascii ZEROS. We return -1 if we ran out of space.
    488 	 */
    489 	while (pt >= str)
    490 		*pt-- = '0';
    491 	if (val != (u_quad_t)0)
    492 		return(-1);
    493 	return(0);
    494 }
    495 #endif
    496