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gen_subs.c revision 1.11 
      1 /*	$NetBSD: gen_subs.c,v 1.11 1998/07/26 19:43:14 mycroft 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 1.11 1998/07/26 19:43:14 mycroft 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 <time.h>
     56 #include <tzfile.h>
     57 #include <utmp.h>
     58 #include <unistd.h>
     59 #include <stdlib.h>
     60 #include <string.h>
     61 #include "pax.h"
     62 #include "extern.h"
     63 
     64 /*
     65  * a collection of general purpose subroutines used by pax
     66  */
     67 
     68 /*
     69  * constants used by ls_list() when printing out archive members
     70  */
     71 #define MODELEN 20
     72 #define DATELEN 64
     73 #define SIXMONTHS	 ((DAYSPERNYEAR / 2) * SECSPERDAY)
     74 #define CURFRMT		"%b %e %H:%M"
     75 #define OLDFRMT		"%b %e  %Y"
     76 #ifndef UT_NAMESIZE
     77 #define UT_NAMESIZE	8
     78 #endif
     79 #define UT_GRPSIZE	6
     80 
     81 /*
     82  * ls_list()
     83  *	list the members of an archive in ls format
     84  */
     85 
     86 #if __STDC__
     87 void
     88 ls_list(ARCHD *arcn, time_t now)
     89 #else
     90 void
     91 ls_list(arcn, now)
     92 	ARCHD *arcn;
     93 	time_t now;
     94 #endif
     95 {
     96 	struct stat *sbp;
     97 	char f_mode[MODELEN];
     98 	char f_date[DATELEN];
     99 	char *timefrmt;
    100 
    101 	/*
    102 	 * if not verbose, just print the file name
    103 	 */
    104 	if (!vflag) {
    105 		(void)printf("%s\n", arcn->name);
    106 		(void)fflush(stdout);
    107 		return;
    108 	}
    109 
    110 	/*
    111 	 * user wants long mode
    112 	 */
    113 	sbp = &(arcn->sb);
    114 	strmode(sbp->st_mode, f_mode);
    115 
    116 	if (ltmfrmt == NULL) {
    117 		/*
    118 		 * no locale specified format. time format based on age
    119 		 * compared to the time pax was started.
    120 		 */
    121 		if ((sbp->st_mtime + SIXMONTHS) <= now)
    122 			timefrmt = OLDFRMT;
    123 		else
    124 			timefrmt = CURFRMT;
    125 	} else
    126 		timefrmt = ltmfrmt;
    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 	(void)printf("%s%2u %-*s %-*s ", f_mode, sbp->st_nlink, UT_NAMESIZE,
    134 		name_uid(sbp->st_uid, 1), UT_GRPSIZE,
    135 		name_gid(sbp->st_gid, 1));
    136 
    137 	/*
    138 	 * print device id's for devices, or sizes for other nodes
    139 	 */
    140 	if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK))
    141 #		ifdef NET2_STAT
    142 		(void)printf("%4u,%4u ", MAJOR(sbp->st_rdev),
    143 		    MINOR(sbp->st_rdev));
    144 #		else
    145 		(void)printf("%4lu,%4lu ", (long) MAJOR(sbp->st_rdev),
    146 		    (long) MINOR(sbp->st_rdev));
    147 #		endif
    148 	else {
    149 #		ifdef NET2_STAT
    150 		(void)printf("%9lu ", sbp->st_size);
    151 #		else
    152 		(void)printf("%9qu ", (long long)sbp->st_size);
    153 #		endif
    154 	}
    155 
    156 	/*
    157 	 * print name and link info for hard and soft links
    158 	 */
    159 	(void)printf("%s %s", f_date, arcn->name);
    160 	if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG))
    161 		(void)printf(" == %s\n", arcn->ln_name);
    162 	else if (arcn->type == PAX_SLK)
    163 		(void)printf(" => %s\n", arcn->ln_name);
    164 	else
    165 		(void)putchar('\n');
    166 	(void)fflush(stdout);
    167 	return;
    168 }
    169 
    170 /*
    171  * tty_ls()
    172  * 	print a short summary of file to tty.
    173  */
    174 
    175 #if __STDC__
    176 void
    177 ls_tty(ARCHD *arcn)
    178 #else
    179 void
    180 ls_tty(arcn)
    181 	ARCHD *arcn;
    182 #endif
    183 {
    184 	char f_date[DATELEN];
    185 	char f_mode[MODELEN];
    186 	char *timefrmt;
    187 
    188 	if (ltmfrmt == NULL) {
    189 		/*
    190 		 * no locale specified format
    191 		 */
    192 		if ((arcn->sb.st_mtime + SIXMONTHS) <= time((time_t *)NULL))
    193 			timefrmt = OLDFRMT;
    194 		else
    195 			timefrmt = CURFRMT;
    196 	} else
    197 		timefrmt = ltmfrmt;
    198 
    199 	/*
    200 	 * convert time to string, and print
    201 	 */
    202 	if (strftime(f_date, DATELEN, timefrmt,
    203 	    localtime(&(arcn->sb.st_mtime))) == 0)
    204 		f_date[0] = '\0';
    205 	strmode(arcn->sb.st_mode, f_mode);
    206 	tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
    207 	return;
    208 }
    209 
    210 /*
    211  * zf_strncpy()
    212  *	copy src to dest up to len chars (stopping at first '\0'), when src is
    213  *	shorter than len, pads to len with '\0'. big performance win (and
    214  *	a lot easier to code) over strncpy(), then a strlen() then a
    215  *	memset(). (or doing the memset() first).
    216  */
    217 
    218 #if __STDC__
    219 void
    220 zf_strncpy(char *dest, const char *src, int len)
    221 #else
    222 void
    223 zf_strncpy(dest, src, len)
    224 	char *dest;
    225 	char *src;
    226 	int len;
    227 #endif
    228 {
    229 	char *stop;
    230 
    231 	stop = dest + len;
    232 	while ((dest < stop) && (*src != '\0'))
    233 		*dest++ = *src++;
    234 	while (dest < stop)
    235 		*dest++ = '\0';
    236 	return;
    237 }
    238 
    239 /*
    240  * l_strncpy()
    241  *	copy src to dest up to len chars (stopping at first '\0')
    242  * Return:
    243  *	number of chars copied. (Note this is a real performance win over
    244  *	doing a strncpy() then a strlen()
    245  */
    246 
    247 #if __STDC__
    248 int
    249 l_strncpy(char *dest, const char *src, int len)
    250 #else
    251 int
    252 l_strncpy(dest, src, len)
    253 	char *dest;
    254 	char *src;
    255 	int len;
    256 #endif
    257 {
    258 	char *stop;
    259 	char *start;
    260 
    261 	stop = dest + len;
    262 	start = dest;
    263 	while ((dest < stop) && (*src != '\0'))
    264 		*dest++ = *src++;
    265 	if (dest < stop)
    266 		*dest = '\0';
    267 	return(dest - start);
    268 }
    269 
    270 /*
    271  * asc_ul()
    272  *	convert hex/octal character string into a u_long. We do not have to
    273  *	check for overflow! (the headers in all supported formats are not large
    274  *	enough to create an overflow).
    275  *	NOTE: strings passed to us are NOT TERMINATED.
    276  * Return:
    277  *	unsigned long value
    278  */
    279 
    280 #if __STDC__
    281 u_long
    282 asc_ul(char *str, int len, int base)
    283 #else
    284 u_long
    285 asc_ul(str, len, base)
    286 	char *str;
    287 	int len;
    288 	int base;
    289 #endif
    290 {
    291 	char *stop;
    292 	u_long tval = 0;
    293 
    294 	stop = str + len;
    295 
    296 	/*
    297 	 * skip over leading blanks and zeros
    298 	 */
    299 	while ((str < stop) && ((*str == ' ') || (*str == '0')))
    300 		++str;
    301 
    302 	/*
    303 	 * for each valid digit, shift running value (tval) over to next digit
    304 	 * and add next digit
    305 	 */
    306 	if (base == HEX) {
    307 		while (str < stop) {
    308 			if ((*str >= '0') && (*str <= '9'))
    309 				tval = (tval << 4) + (*str++ - '0');
    310 			else if ((*str >= 'A') && (*str <= 'F'))
    311 				tval = (tval << 4) + 10 + (*str++ - 'A');
    312 			else if ((*str >= 'a') && (*str <= 'f'))
    313 				tval = (tval << 4) + 10 + (*str++ - 'a');
    314 			else
    315 				break;
    316 		}
    317 	} else {
    318  		while ((str < stop) && (*str >= '0') && (*str <= '7'))
    319 			tval = (tval << 3) + (*str++ - '0');
    320 	}
    321 	return(tval);
    322 }
    323 
    324 /*
    325  * ul_asc()
    326  *	convert an unsigned long into an hex/oct ascii string. pads with LEADING
    327  *	ascii 0's to fill string completely
    328  *	NOTE: the string created is NOT TERMINATED.
    329  */
    330 
    331 #if __STDC__
    332 int
    333 ul_asc(u_long val, char *str, int len, int base)
    334 #else
    335 int
    336 ul_asc(val, str, len, base)
    337 	u_long val;
    338 	char *str;
    339 	int len;
    340 	int base;
    341 #endif
    342 {
    343 	char *pt;
    344 	u_long digit;
    345 
    346 	/*
    347 	 * WARNING str is not '\0' terminated by this routine
    348 	 */
    349 	pt = str + len - 1;
    350 
    351 	/*
    352 	 * do a tailwise conversion (start at right most end of string to place
    353 	 * least significant digit). Keep shifting until conversion value goes
    354 	 * to zero (all digits were converted)
    355 	 */
    356 	if (base == HEX) {
    357 		while (pt >= str) {
    358 			if ((digit = (val & 0xf)) < 10)
    359 				*pt-- = '0' + (char)digit;
    360 			else
    361 				*pt-- = 'a' + (char)(digit - 10);
    362 			if ((val = (val >> 4)) == (u_long)0)
    363 				break;
    364 		}
    365 	} else {
    366 		while (pt >= str) {
    367 			*pt-- = '0' + (char)(val & 0x7);
    368 			if ((val = (val >> 3)) == (u_long)0)
    369 				break;
    370 		}
    371 	}
    372 
    373 	/*
    374 	 * pad with leading ascii ZEROS. We return -1 if we ran out of space.
    375 	 */
    376 	while (pt >= str)
    377 		*pt-- = '0';
    378 	if (val != (u_long)0)
    379 		return(-1);
    380 	return(0);
    381 }
    382 
    383 #ifndef NET2_STAT
    384 /*
    385  * asc_uqd()
    386  *	convert hex/octal character string into a u_quad_t. We do not have to
    387  *	check for overflow! (the headers in all supported formats are not large
    388  *	enough to create an overflow).
    389  *	NOTE: strings passed to us are NOT TERMINATED.
    390  * Return:
    391  *	u_quad_t value
    392  */
    393 
    394 #if __STDC__
    395 u_quad_t
    396 asc_uqd(char *str, int len, int base)
    397 #else
    398 u_quad_t
    399 asc_uqd(str, len, base)
    400 	char *str;
    401 	int len;
    402 	int base;
    403 #endif
    404 {
    405 	char *stop;
    406 	u_quad_t tval = 0;
    407 
    408 #ifdef __GNUC__
    409 	/* This outrageous construct just to shut up a GCC warning. */
    410 	(void) &tval;
    411 #endif
    412 
    413 	stop = str + len;
    414 
    415 	/*
    416 	 * skip over leading blanks and zeros
    417 	 */
    418 	while ((str < stop) && ((*str == ' ') || (*str == '0')))
    419 		++str;
    420 
    421 	/*
    422 	 * for each valid digit, shift running value (tval) over to next digit
    423 	 * and add next digit
    424 	 */
    425 	if (base == HEX) {
    426 		while (str < stop) {
    427 			if ((*str >= '0') && (*str <= '9'))
    428 				tval = (tval << 4) + (*str++ - '0');
    429 			else if ((*str >= 'A') && (*str <= 'F'))
    430 				tval = (tval << 4) + 10 + (*str++ - 'A');
    431 			else if ((*str >= 'a') && (*str <= 'f'))
    432 				tval = (tval << 4) + 10 + (*str++ - 'a');
    433 			else
    434 				break;
    435 		}
    436 	} else {
    437  		while ((str < stop) && (*str >= '0') && (*str <= '7'))
    438 			tval = (tval << 3) + (*str++ - '0');
    439 	}
    440 	return(tval);
    441 }
    442 
    443 /*
    444  * uqd_asc()
    445  *	convert an u_quad_t into a hex/oct ascii string. pads with LEADING
    446  *	ascii 0's to fill string completely
    447  *	NOTE: the string created is NOT TERMINATED.
    448  */
    449 
    450 #if __STDC__
    451 int
    452 uqd_asc(u_quad_t val, char *str, int len, int base)
    453 #else
    454 int
    455 uqd_asc(val, str, len, base)
    456 	u_quad_t val;
    457 	char *str;
    458 	int len;
    459 	int base;
    460 #endif
    461 {
    462 	char *pt;
    463 	u_quad_t digit;
    464 
    465 	/*
    466 	 * WARNING str is not '\0' terminated by this routine
    467 	 */
    468 	pt = str + len - 1;
    469 
    470 	/*
    471 	 * do a tailwise conversion (start at right most end of string to place
    472 	 * least significant digit). Keep shifting until conversion value goes
    473 	 * to zero (all digits were converted)
    474 	 */
    475 	if (base == HEX) {
    476 		while (pt >= str) {
    477 			if ((digit = (val & 0xf)) < 10)
    478 				*pt-- = '0' + (char)digit;
    479 			else
    480 				*pt-- = 'a' + (char)(digit - 10);
    481 			if ((val = (val >> 4)) == (u_quad_t)0)
    482 				break;
    483 		}
    484 	} else {
    485 		while (pt >= str) {
    486 			*pt-- = '0' + (char)(val & 0x7);
    487 			if ((val = (val >> 3)) == (u_quad_t)0)
    488 				break;
    489 		}
    490 	}
    491 
    492 	/*
    493 	 * pad with leading ascii ZEROS. We return -1 if we ran out of space.
    494 	 */
    495 	while (pt >= str)
    496 		*pt-- = '0';
    497 	if (val != (u_quad_t)0)
    498 		return(-1);
    499 	return(0);
    500 }
    501 #endif
    502