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gen_subs.c revision 1.13 
      1 /*	$NetBSD: gen_subs.c,v 1.13 1998/07/28 17:44:24 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 1.13 1998/07/28 17:44:24 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 
     54 #include <ctype.h>
     55 #include <grp.h>
     56 #include <pwd.h>
     57 #include <stdio.h>
     58 #include <stdlib.h>
     59 #include <string.h>
     60 #include <time.h>
     61 #include <tzfile.h>
     62 #include <unistd.h>
     63 #include <utmp.h>
     64 
     65 #include "pax.h"
     66 #include "extern.h"
     67 
     68 /*
     69  * a collection of general purpose subroutines used by pax
     70  */
     71 
     72 /*
     73  * constants used by ls_list() when printing out archive members
     74  */
     75 #define MODELEN 20
     76 #define DATELEN 64
     77 #define SIXMONTHS	 ((DAYSPERNYEAR / 2) * SECSPERDAY)
     78 #define CURFRMT		"%b %e %H:%M"
     79 #define OLDFRMT		"%b %e  %Y"
     80 #ifndef UT_NAMESIZE
     81 #define UT_NAMESIZE	8
     82 #endif
     83 #define UT_GRPSIZE	6
     84 
     85 /*
     86  * ls_list()
     87  *	list the members of an archive in ls format
     88  */
     89 
     90 #if __STDC__
     91 void
     92 ls_list(ARCHD *arcn, time_t now)
     93 #else
     94 void
     95 ls_list(arcn, now)
     96 	ARCHD *arcn;
     97 	time_t now;
     98 #endif
     99 {
    100 	struct stat *sbp;
    101 	char f_mode[MODELEN];
    102 	char f_date[DATELEN];
    103 	const char *timefrmt, *user, *group;
    104 
    105 	/*
    106 	 * if not verbose, just print the file name
    107 	 */
    108 	if (!vflag) {
    109 		(void)printf("%s\n", arcn->name);
    110 		(void)fflush(stdout);
    111 		return;
    112 	}
    113 
    114 	/*
    115 	 * user wants long mode
    116 	 */
    117 	sbp = &(arcn->sb);
    118 	strmode(sbp->st_mode, f_mode);
    119 
    120 	if (ltmfrmt == NULL) {
    121 		/*
    122 		 * no locale specified format. time format based on age
    123 		 * compared to the time pax was started.
    124 		 */
    125 		if ((sbp->st_mtime + SIXMONTHS) <= now)
    126 			timefrmt = OLDFRMT;
    127 		else
    128 			timefrmt = CURFRMT;
    129 	} else
    130 		timefrmt = ltmfrmt;
    131 
    132 	/*
    133 	 * print file mode, link count, uid, gid and time
    134 	 */
    135 	if (strftime(f_date,DATELEN,timefrmt,localtime(&(sbp->st_mtime))) == 0)
    136 		f_date[0] = '\0';
    137 	user = user_from_uid(sbp->st_uid, 0);
    138 	group = group_from_gid(sbp->st_gid, 0);
    139 	(void)printf("%s%2u %-*s %-*s ", f_mode, sbp->st_nlink,
    140 	    UT_NAMESIZE, user ? user : "", UT_GRPSIZE, group ? group : "");
    141 
    142 	/*
    143 	 * print device id's for devices, or sizes for other nodes
    144 	 */
    145 	if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK))
    146 #		ifdef NET2_STAT
    147 		(void)printf("%4u,%4u ", MAJOR(sbp->st_rdev),
    148 		    MINOR(sbp->st_rdev));
    149 #		else
    150 		(void)printf("%4lu,%4lu ", (long) MAJOR(sbp->st_rdev),
    151 		    (long) MINOR(sbp->st_rdev));
    152 #		endif
    153 	else {
    154 #		ifdef NET2_STAT
    155 		(void)printf("%9lu ", sbp->st_size);
    156 #		else
    157 		(void)printf("%9qu ", (long long)sbp->st_size);
    158 #		endif
    159 	}
    160 
    161 	/*
    162 	 * print name and link info for hard and soft links
    163 	 */
    164 	(void)printf("%s %s", f_date, arcn->name);
    165 	if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG))
    166 		(void)printf(" == %s\n", arcn->ln_name);
    167 	else if (arcn->type == PAX_SLK)
    168 		(void)printf(" => %s\n", arcn->ln_name);
    169 	else
    170 		(void)putchar('\n');
    171 	(void)fflush(stdout);
    172 	return;
    173 }
    174 
    175 /*
    176  * tty_ls()
    177  * 	print a short summary of file to tty.
    178  */
    179 
    180 #if __STDC__
    181 void
    182 ls_tty(ARCHD *arcn)
    183 #else
    184 void
    185 ls_tty(arcn)
    186 	ARCHD *arcn;
    187 #endif
    188 {
    189 	char f_date[DATELEN];
    190 	char f_mode[MODELEN];
    191 	const char *timefrmt;
    192 
    193 	if (ltmfrmt == NULL) {
    194 		/*
    195 		 * no locale specified format
    196 		 */
    197 		if ((arcn->sb.st_mtime + SIXMONTHS) <= time((time_t *)NULL))
    198 			timefrmt = OLDFRMT;
    199 		else
    200 			timefrmt = CURFRMT;
    201 	} else
    202 		timefrmt = ltmfrmt;
    203 
    204 	/*
    205 	 * convert time to string, and print
    206 	 */
    207 	if (strftime(f_date, DATELEN, timefrmt,
    208 	    localtime(&(arcn->sb.st_mtime))) == 0)
    209 		f_date[0] = '\0';
    210 	strmode(arcn->sb.st_mode, f_mode);
    211 	tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
    212 	return;
    213 }
    214 
    215 /*
    216  * zf_strncpy()
    217  *	copy src to dest up to len chars (stopping at first '\0'), when src is
    218  *	shorter than len, pads to len with '\0'. big performance win (and
    219  *	a lot easier to code) over strncpy(), then a strlen() then a
    220  *	memset(). (or doing the memset() first).
    221  */
    222 
    223 #if __STDC__
    224 void
    225 zf_strncpy(char *dest, const char *src, int len)
    226 #else
    227 void
    228 zf_strncpy(dest, src, len)
    229 	char *dest;
    230 	char *src;
    231 	int len;
    232 #endif
    233 {
    234 	char *stop;
    235 
    236 	stop = dest + len;
    237 	while ((dest < stop) && (*src != '\0'))
    238 		*dest++ = *src++;
    239 	while (dest < stop)
    240 		*dest++ = '\0';
    241 	return;
    242 }
    243 
    244 /*
    245  * l_strncpy()
    246  *	copy src to dest up to len chars (stopping at first '\0')
    247  * Return:
    248  *	number of chars copied. (Note this is a real performance win over
    249  *	doing a strncpy() then a strlen()
    250  */
    251 
    252 #if __STDC__
    253 int
    254 l_strncpy(char *dest, const char *src, int len)
    255 #else
    256 int
    257 l_strncpy(dest, src, len)
    258 	char *dest;
    259 	char *src;
    260 	int len;
    261 #endif
    262 {
    263 	char *stop;
    264 	char *start;
    265 
    266 	stop = dest + len;
    267 	start = dest;
    268 	while ((dest < stop) && (*src != '\0'))
    269 		*dest++ = *src++;
    270 	if (dest < stop)
    271 		*dest = '\0';
    272 	return(dest - start);
    273 }
    274 
    275 /*
    276  * asc_ul()
    277  *	convert hex/octal character string into a u_long. We do not have to
    278  *	check for overflow! (the headers in all supported formats are not large
    279  *	enough to create an overflow).
    280  *	NOTE: strings passed to us are NOT TERMINATED.
    281  * Return:
    282  *	unsigned long value
    283  */
    284 
    285 #if __STDC__
    286 u_long
    287 asc_ul(char *str, int len, int base)
    288 #else
    289 u_long
    290 asc_ul(str, len, base)
    291 	char *str;
    292 	int len;
    293 	int base;
    294 #endif
    295 {
    296 	char *stop;
    297 	u_long tval = 0;
    298 
    299 	stop = str + len;
    300 
    301 	/*
    302 	 * skip over leading blanks and zeros
    303 	 */
    304 	while ((str < stop) && ((*str == ' ') || (*str == '0')))
    305 		++str;
    306 
    307 	/*
    308 	 * for each valid digit, shift running value (tval) over to next digit
    309 	 * and add next digit
    310 	 */
    311 	if (base == HEX) {
    312 		while (str < stop) {
    313 			if ((*str >= '0') && (*str <= '9'))
    314 				tval = (tval << 4) + (*str++ - '0');
    315 			else if ((*str >= 'A') && (*str <= 'F'))
    316 				tval = (tval << 4) + 10 + (*str++ - 'A');
    317 			else if ((*str >= 'a') && (*str <= 'f'))
    318 				tval = (tval << 4) + 10 + (*str++ - 'a');
    319 			else
    320 				break;
    321 		}
    322 	} else {
    323  		while ((str < stop) && (*str >= '0') && (*str <= '7'))
    324 			tval = (tval << 3) + (*str++ - '0');
    325 	}
    326 	return(tval);
    327 }
    328 
    329 /*
    330  * ul_asc()
    331  *	convert an unsigned long into an hex/oct ascii string. pads with LEADING
    332  *	ascii 0's to fill string completely
    333  *	NOTE: the string created is NOT TERMINATED.
    334  */
    335 
    336 #if __STDC__
    337 int
    338 ul_asc(u_long val, char *str, int len, int base)
    339 #else
    340 int
    341 ul_asc(val, str, len, base)
    342 	u_long val;
    343 	char *str;
    344 	int len;
    345 	int base;
    346 #endif
    347 {
    348 	char *pt;
    349 	u_long digit;
    350 
    351 	/*
    352 	 * WARNING str is not '\0' terminated by this routine
    353 	 */
    354 	pt = str + len - 1;
    355 
    356 	/*
    357 	 * do a tailwise conversion (start at right most end of string to place
    358 	 * least significant digit). Keep shifting until conversion value goes
    359 	 * to zero (all digits were converted)
    360 	 */
    361 	if (base == HEX) {
    362 		while (pt >= str) {
    363 			if ((digit = (val & 0xf)) < 10)
    364 				*pt-- = '0' + (char)digit;
    365 			else
    366 				*pt-- = 'a' + (char)(digit - 10);
    367 			if ((val = (val >> 4)) == (u_long)0)
    368 				break;
    369 		}
    370 	} else {
    371 		while (pt >= str) {
    372 			*pt-- = '0' + (char)(val & 0x7);
    373 			if ((val = (val >> 3)) == (u_long)0)
    374 				break;
    375 		}
    376 	}
    377 
    378 	/*
    379 	 * pad with leading ascii ZEROS. We return -1 if we ran out of space.
    380 	 */
    381 	while (pt >= str)
    382 		*pt-- = '0';
    383 	if (val != (u_long)0)
    384 		return(-1);
    385 	return(0);
    386 }
    387 
    388 #ifndef NET2_STAT
    389 /*
    390  * asc_uqd()
    391  *	convert hex/octal character string into a u_quad_t. We do not have to
    392  *	check for overflow! (the headers in all supported formats are not large
    393  *	enough to create an overflow).
    394  *	NOTE: strings passed to us are NOT TERMINATED.
    395  * Return:
    396  *	u_quad_t value
    397  */
    398 
    399 #if __STDC__
    400 u_quad_t
    401 asc_uqd(char *str, int len, int base)
    402 #else
    403 u_quad_t
    404 asc_uqd(str, len, base)
    405 	char *str;
    406 	int len;
    407 	int base;
    408 #endif
    409 {
    410 	char *stop;
    411 	u_quad_t tval = 0;
    412 
    413 #ifdef __GNUC__
    414 	/* This outrageous construct just to shut up a GCC warning. */
    415 	(void) &tval;
    416 #endif
    417 
    418 	stop = str + len;
    419 
    420 	/*
    421 	 * skip over leading blanks and zeros
    422 	 */
    423 	while ((str < stop) && ((*str == ' ') || (*str == '0')))
    424 		++str;
    425 
    426 	/*
    427 	 * for each valid digit, shift running value (tval) over to next digit
    428 	 * and add next digit
    429 	 */
    430 	if (base == HEX) {
    431 		while (str < stop) {
    432 			if ((*str >= '0') && (*str <= '9'))
    433 				tval = (tval << 4) + (*str++ - '0');
    434 			else if ((*str >= 'A') && (*str <= 'F'))
    435 				tval = (tval << 4) + 10 + (*str++ - 'A');
    436 			else if ((*str >= 'a') && (*str <= 'f'))
    437 				tval = (tval << 4) + 10 + (*str++ - 'a');
    438 			else
    439 				break;
    440 		}
    441 	} else {
    442  		while ((str < stop) && (*str >= '0') && (*str <= '7'))
    443 			tval = (tval << 3) + (*str++ - '0');
    444 	}
    445 	return(tval);
    446 }
    447 
    448 /*
    449  * uqd_asc()
    450  *	convert an u_quad_t into a hex/oct ascii string. pads with LEADING
    451  *	ascii 0's to fill string completely
    452  *	NOTE: the string created is NOT TERMINATED.
    453  */
    454 
    455 #if __STDC__
    456 int
    457 uqd_asc(u_quad_t val, char *str, int len, int base)
    458 #else
    459 int
    460 uqd_asc(val, str, len, base)
    461 	u_quad_t val;
    462 	char *str;
    463 	int len;
    464 	int base;
    465 #endif
    466 {
    467 	char *pt;
    468 	u_quad_t digit;
    469 
    470 	/*
    471 	 * WARNING str is not '\0' terminated by this routine
    472 	 */
    473 	pt = str + len - 1;
    474 
    475 	/*
    476 	 * do a tailwise conversion (start at right most end of string to place
    477 	 * least significant digit). Keep shifting until conversion value goes
    478 	 * to zero (all digits were converted)
    479 	 */
    480 	if (base == HEX) {
    481 		while (pt >= str) {
    482 			if ((digit = (val & 0xf)) < 10)
    483 				*pt-- = '0' + (char)digit;
    484 			else
    485 				*pt-- = 'a' + (char)(digit - 10);
    486 			if ((val = (val >> 4)) == (u_quad_t)0)
    487 				break;
    488 		}
    489 	} else {
    490 		while (pt >= str) {
    491 			*pt-- = '0' + (char)(val & 0x7);
    492 			if ((val = (val >> 3)) == (u_quad_t)0)
    493 				break;
    494 		}
    495 	}
    496 
    497 	/*
    498 	 * pad with leading ascii ZEROS. We return -1 if we ran out of space.
    499 	 */
    500 	while (pt >= str)
    501 		*pt-- = '0';
    502 	if (val != (u_quad_t)0)
    503 		return(-1);
    504 	return(0);
    505 }
    506 #endif
    507