pax/gen_subs.c

   1 /*      $OpenBSD: gen_subs.c,v 1.8 1997/09/01 18:29:51 deraadt 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. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed by the University of
  23  *      California, Berkeley and its contributors.
  24  * 4. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  */
  40
  41 #ifndef lint
  42 #if 0
  43 static char sccsid[] = "@(#)gen_subs.c  8.1 (Berkeley) 5/31/93";
  44 #else
  45 static char rcsid[] __attribute__((__unused__)) = "$OpenBSD: gen_subs.c,v 1.8 1997/09/01 18:29:51 deraadt 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 <tzfile.h>
  55 #include <utmp.h>
  56 #include <unistd.h>
  57 #include <stdlib.h>
  58 #include <string.h>
  59 #include "pax.h"
  60 #include "extern.h"
  61
  62 /*
  63  * a collection of general purpose subroutines used by pax
  64  */
  65
  66 /*
  67  * constants used by ls_list() when printing out archive members
  68  */
  69 #define MODELEN 20
  70 #define DATELEN 64
  71 #define SIXMONTHS        ((DAYSPERNYEAR / 2) * SECSPERDAY)
  72 #define CURFRMT         "%b %e %H:%M"
  73 #define OLDFRMT         "%b %e  %Y"
  74 #ifndef UT_NAMESIZE
  75 #define UT_NAMESIZE     8
  76 #endif
  77 #define UT_GRPSIZE      6
  78
  79 /*
  80  * ls_list()
  81  *      list the members of an archive in ls format
  82  */
  83
  84 #ifdef __STDC__
  85 void
  86 ls_list(register ARCHD *arcn, time_t now, FILE *fp)
  87 #else
  88 void
  89 ls_list(arcn, now, fp)
  90         register ARCHD *arcn;
  91         time_t now;
  92         FILE *fp;
  93 #endif
  94 {
  95         register 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)fprintf(fp, "%s\n", arcn->name);
 105                 (void)fflush(fp);
 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((const time_t *)&(sbp->st_mtime))) == 0)
 131                 f_date[0] = '\0';
 132         (void)fprintf(fp, "%s%2u %-*s %-*s ", f_mode, sbp->st_nlink,
 133                 UT_NAMESIZE, 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)fprintf(fp, "%4u,%4u ", MAJOR(sbp->st_rdev),
 142 #               else
 143                 (void)fprintf(fp, "%4lu,%4lu ", (unsigned long)MAJOR(sbp->st_rdev),
 144 #               endif
 145                     (unsigned long)MINOR(sbp->st_rdev));
 146         else {
 147 #               ifdef NET2_STAT
 148                 (void)fprintf(fp, "%9lu ", sbp->st_size);
 149 #               else
 150                 (void)fprintf(fp, "%9qu ", sbp->st_size);
 151 #               endif
 152         }
 153
 154         /*
 155          * print name and link info for hard and soft links
 156          */
 157         (void)fprintf(fp, "%s %s", f_date, arcn->name);
 158         if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG))
 159                 (void)fprintf(fp, " == %s\n", arcn->ln_name);
 160         else if (arcn->type == PAX_SLK)
 161                 (void)fprintf(fp, " => %s\n", arcn->ln_name);
 162         else
 163                 (void)putc('\n', fp);
 164         (void)fflush(fp);
 165         return;
 166 }
 167
 168 /*
 169  * tty_ls()
 170  *      print a short summary of file to tty.
 171  */
 172
 173 #ifdef __STDC__
 174 void
 175 ls_tty(register ARCHD *arcn)
 176 #else
 177 void
 178 ls_tty(arcn)
 179         register ARCHD *arcn;
 180 #endif
 181 {
 182         char f_date[DATELEN];
 183         char f_mode[MODELEN];
 184         char *timefrmt;
 185
 186         if (ltmfrmt == NULL) {
 187                 /*
 188                  * no locale specified format
 189                  */
 190                 if ((arcn->sb.st_mtime + SIXMONTHS) <= time(NULL))
 191                         timefrmt = OLDFRMT;
 192                 else
 193                         timefrmt = CURFRMT;
 194         } else
 195                 timefrmt = ltmfrmt;
 196
 197         /*
 198          * convert time to string, and print
 199          */
 200         if (strftime(f_date, DATELEN, timefrmt,
 201             localtime((const time_t *)&(arcn->sb.st_mtime))) == 0)
 202                 f_date[0] = '\0';
 203         strmode(arcn->sb.st_mode, f_mode);
 204         tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
 205         return;
 206 }
 207
 208 /*
 209  * l_strncpy()
 210  *      copy src to dest up to len chars (stopping at first '\0').
 211  *      when src is shorter than len, pads to len with '\0'.
 212  * Return:
 213  *      number of chars copied. (Note this is a real performance win over
 214  *      doing a strncpy(), a strlen(), and then a possible memset())
 215  */
 216
 217 #ifdef __STDC__
 218 int
 219 l_strncpy(register char *dest, register char *src, int len)
 220 #else
 221 int
 222 l_strncpy(dest, src, len)
 223         register char *dest;
 224         register char *src;
 225         int len;
 226 #endif
 227 {
 228         register char *stop;
 229         register char *start;
 230
 231         stop = dest + len;
 232         start = dest;
 233         while ((dest < stop) && (*src != '\0'))
 234                 *dest++ = *src++;
 235         len = dest - start;
 236         while (dest < stop)
 237                 *dest++ = '\0';
 238         return(len);
 239 }
 240
 241 /*
 242  * asc_ul()
 243  *      convert hex/octal character string into a u_long. We do not have to
 244  *      check for overflow! (the headers in all supported formats are not large
 245  *      enough to create an overflow).
 246  *      NOTE: strings passed to us are NOT TERMINATED.
 247  * Return:
 248  *      unsigned long value
 249  */
 250
 251 #ifdef __STDC__
 252 u_long
 253 asc_ul(register char *str, int len, register int base)
 254 #else
 255 u_long
 256 asc_ul(str, len, base)
 257         register char *str;
 258         int len;
 259         register int base;
 260 #endif
 261 {
 262         register char *stop;
 263         u_long tval = 0;
 264
 265         stop = str + len;
 266
 267         /*
 268          * skip over leading blanks and zeros
 269          */
 270         while ((str < stop) && ((*str == ' ') || (*str == '0')))
 271                 ++str;
 272
 273         /*
 274          * for each valid digit, shift running value (tval) over to next digit
 275          * and add next digit
 276          */
 277         if (base == HEX) {
 278                 while (str < stop) {
 279                         if ((*str >= '0') && (*str <= '9'))
 280                                 tval = (tval << 4) + (*str++ - '0');
 281                         else if ((*str >= 'A') && (*str <= 'F'))
 282                                 tval = (tval << 4) + 10 + (*str++ - 'A');
 283                         else if ((*str >= 'a') && (*str <= 'f'))
 284                                 tval = (tval << 4) + 10 + (*str++ - 'a');
 285                         else
 286                                 break;
 287                 }
 288         } else {
 289                 while ((str < stop) && (*str >= '0') && (*str <= '7'))
 290                         tval = (tval << 3) + (*str++ - '0');
 291         }
 292         return(tval);
 293 }
 294
 295 /*
 296  * ul_asc()
 297  *      convert an unsigned long into an hex/oct ascii string. pads with LEADING
 298  *      ascii 0's to fill string completely
 299  *      NOTE: the string created is NOT TERMINATED.
 300  */
 301
 302 #ifdef __STDC__
 303 int
 304 ul_asc(u_long val, register char *str, register int len, register int base)
 305 #else
 306 int
 307 ul_asc(val, str, len, base)
 308         u_long val;
 309         register char *str;
 310         register int len;
 311         register int base;
 312 #endif
 313 {
 314         register char *pt;
 315         u_long digit;
 316
 317         /*
 318          * WARNING str is not '\0' terminated by this routine
 319          */
 320         pt = str + len - 1;
 321
 322         /*
 323          * do a tailwise conversion (start at right most end of string to place
 324          * least significant digit). Keep shifting until conversion value goes
 325          * to zero (all digits were converted)
 326          */
 327         if (base == HEX) {
 328                 while (pt >= str) {
 329                         if ((digit = (val & 0xf)) < 10)
 330                                 *pt-- = '0' + (char)digit;
 331                         else
 332                                 *pt-- = 'a' + (char)(digit - 10);
 333                         if ((val = (val >> 4)) == (u_long)0)
 334                                 break;
 335                 }
 336         } else {
 337                 while (pt >= str) {
 338                         *pt-- = '0' + (char)(val & 0x7);
 339                         if ((val = (val >> 3)) == (u_long)0)
 340                                 break;
 341                 }
 342         }
 343
 344         /*
 345          * pad with leading ascii ZEROS. We return -1 if we ran out of space.
 346          */
 347         while (pt >= str)
 348                 *pt-- = '0';
 349         if (val != (u_long)0)
 350                 return(-1);
 351         return(0);
 352 }
 353
 354 #ifndef NET2_STAT
 355 /*
 356  * asc_uqd()
 357  *      convert hex/octal character string into a u_quad_t. We do not have to
 358  *      check for overflow! (the headers in all supported formats are not large
 359  *      enough to create an overflow).
 360  *      NOTE: strings passed to us are NOT TERMINATED.
 361  * Return:
 362  *      u_quad_t value
 363  */
 364
 365 #ifdef __STDC__
 366 u_quad_t
 367 asc_uqd(register char *str, int len, register int base)
 368 #else
 369 u_quad_t
 370 asc_uqd(str, len, base)
 371         register char *str;
 372         int len;
 373         register int base;
 374 #endif
 375 {
 376         register char *stop;
 377         u_quad_t tval = 0;
 378
 379         stop = str + len;
 380
 381         /*
 382          * skip over leading blanks and zeros
 383          */
 384         while ((str < stop) && ((*str == ' ') || (*str == '0')))
 385                 ++str;
 386
 387         /*
 388          * for each valid digit, shift running value (tval) over to next digit
 389          * and add next digit
 390          */
 391         if (base == HEX) {
 392                 while (str < stop) {
 393                         if ((*str >= '0') && (*str <= '9'))
 394                                 tval = (tval << 4) + (*str++ - '0');
 395                         else if ((*str >= 'A') && (*str <= 'F'))
 396                                 tval = (tval << 4) + 10 + (*str++ - 'A');
 397                         else if ((*str >= 'a') && (*str <= 'f'))
 398                                 tval = (tval << 4) + 10 + (*str++ - 'a');
 399                         else
 400                                 break;
 401                 }
 402         } else {
 403                 while ((str < stop) && (*str >= '0') && (*str <= '7'))
 404                         tval = (tval << 3) + (*str++ - '0');
 405         }
 406         return(tval);
 407 }
 408
 409 /*
 410  * uqd_asc()
 411  *      convert an u_quad_t into a hex/oct ascii string. pads with LEADING
 412  *      ascii 0's to fill string completely
 413  *      NOTE: the string created is NOT TERMINATED.
 414  */
 415
 416 #ifdef __STDC__
 417 int
 418 uqd_asc(u_quad_t val, register char *str, register int len, register int base)
 419 #else
 420 int
 421 uqd_asc(val, str, len, base)
 422         u_quad_t val;
 423         register char *str;
 424         register int len;
 425         register int base;
 426 #endif
 427 {
 428         register char *pt;
 429         u_quad_t digit;
 430
 431         /*
 432          * WARNING str is not '\0' terminated by this routine
 433          */
 434         pt = str + len - 1;
 435
 436         /*
 437          * do a tailwise conversion (start at right most end of string to place
 438          * least significant digit). Keep shifting until conversion value goes
 439          * to zero (all digits were converted)
 440          */
 441         if (base == HEX) {
 442                 while (pt >= str) {
 443                         if ((digit = (val & 0xf)) < 10)
 444                                 *pt-- = '0' + (char)digit;
 445                         else
 446                                 *pt-- = 'a' + (char)(digit - 10);
 447                         if ((val = (val >> 4)) == (u_quad_t)0)
 448                                 break;
 449                 }
 450         } else {
 451                 while (pt >= str) {
 452                         *pt-- = '0' + (char)(val & 0x7);
 453                         if ((val = (val >> 3)) == (u_quad_t)0)
 454                                 break;
 455                 }
 456         }
 457
 458         /*
 459          * pad with leading ascii ZEROS. We return -1 if we ran out of space.
 460          */
 461         while (pt >= str)
 462                 *pt-- = '0';
 463         if (val != (u_quad_t)0)
 464                 return(-1);
 465         return(0);
 466 }
 467 #endif