bin/pax/gen_subs.c

   1 /*-
   2  * Copyright (c) 1992 Keith Muller.
   3  * Copyright (c) 1992, 1993
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * This code is derived from software contributed to Berkeley by
   7  * Keith Muller of the University of California, San Diego.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 #if 0
  36 static char sccsid[] = "@(#)gen_subs.c  8.1 (Berkeley) 5/31/93";
  37 #endif
  38 #endif /* not lint */
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD$");
  41
  42 #include <sys/types.h>
  43 #include <sys/time.h>
  44 #include <sys/stat.h>
  45 #include <langinfo.h>
  46 #include <stdint.h>
  47 #include <stdio.h>
  48 #include <string.h>
  49 #include "pax.h"
  50 #include "extern.h"
  51
  52 /*
  53  * a collection of general purpose subroutines used by pax
  54  */
  55
  56 /*
  57  * constants used by ls_list() when printing out archive members
  58  */
  59 #define MODELEN 20
  60 #define DATELEN 64
  61 #define SIXMONTHS        ((365 / 2) * 86400)
  62 #define CURFRMTM        "%b %e %H:%M"
  63 #define OLDFRMTM        "%b %e  %Y"
  64 #define CURFRMTD        "%e %b %H:%M"
  65 #define OLDFRMTD        "%e %b  %Y"
  66
  67 static int d_first = -1;
  68
  69 /*
  70  * ls_list()
  71  *      list the members of an archive in ls format
  72  */
  73
  74 void
  75 ls_list(ARCHD *arcn, time_t now, FILE *fp)
  76 {
  77         struct stat *sbp;
  78         char f_mode[MODELEN];
  79         char f_date[DATELEN];
  80         const char *timefrmt;
  81
  82         /*
  83          * if not verbose, just print the file name
  84          */
  85         if (!vflag) {
  86                 (void)fprintf(fp, "%s\n", arcn->name);
  87                 (void)fflush(fp);
  88                 return;
  89         }
  90
  91         if (d_first < 0)
  92                 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
  93         /*
  94          * user wants long mode
  95          */
  96         sbp = &(arcn->sb);
  97         strmode(sbp->st_mode, f_mode);
  98
  99         /*
 100          * time format based on age compared to the time pax was started.
 101          */
 102         if ((sbp->st_mtime + SIXMONTHS) <= now)
 103                 timefrmt = d_first ? OLDFRMTD : OLDFRMTM;
 104         else
 105                 timefrmt = d_first ? CURFRMTD : CURFRMTM;
 106
 107         /*
 108          * print file mode, link count, uid, gid and time
 109          */
 110         if (strftime(f_date,DATELEN,timefrmt,localtime(&(sbp->st_mtime))) == 0)
 111                 f_date[0] = '\0';
 112         (void)fprintf(fp, "%s%2u %-12s %-12s ", f_mode, sbp->st_nlink,
 113                 name_uid(sbp->st_uid, 1), name_gid(sbp->st_gid, 1));
 114
 115         /*
 116          * print device id's for devices, or sizes for other nodes
 117          */
 118         if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK))
 119 #               ifdef NET2_STAT
 120                 (void)fprintf(fp, "%4u,%4u ", MAJOR(sbp->st_rdev),
 121                     MINOR(sbp->st_rdev));
 122 #               else
 123                 (void)fprintf(fp, "%4lu,%4lu ", (unsigned long)MAJOR(sbp->st_rdev),
 124                     (unsigned long)MINOR(sbp->st_rdev));
 125 #               endif
 126         else {
 127 #               ifdef NET2_STAT
 128                 (void)fprintf(fp, "%9lu ", sbp->st_size);
 129 #               else
 130                 (void)fprintf(fp, "%9ju ", (uintmax_t)sbp->st_size);
 131 #               endif
 132         }
 133
 134         /*
 135          * print name and link info for hard and soft links
 136          */
 137         (void)fprintf(fp, "%s %s", f_date, arcn->name);
 138         if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG))
 139                 (void)fprintf(fp, " == %s\n", arcn->ln_name);
 140         else if (arcn->type == PAX_SLK)
 141                 (void)fprintf(fp, " => %s\n", arcn->ln_name);
 142         else
 143                 (void)putc('\n', fp);
 144         (void)fflush(fp);
 145         return;
 146 }
 147
 148 /*
 149  * tty_ls()
 150  *      print a short summary of file to tty.
 151  */
 152
 153 void
 154 ls_tty(ARCHD *arcn)
 155 {
 156         char f_date[DATELEN];
 157         char f_mode[MODELEN];
 158         const char *timefrmt;
 159
 160         if (d_first < 0)
 161                 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
 162
 163         if ((arcn->sb.st_mtime + SIXMONTHS) <= time(NULL))
 164                 timefrmt = d_first ? OLDFRMTD : OLDFRMTM;
 165         else
 166                 timefrmt = d_first ? CURFRMTD : CURFRMTM;
 167
 168         /*
 169          * convert time to string, and print
 170          */
 171         if (strftime(f_date, DATELEN, timefrmt,
 172             localtime(&(arcn->sb.st_mtime))) == 0)
 173                 f_date[0] = '\0';
 174         strmode(arcn->sb.st_mode, f_mode);
 175         tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
 176         return;
 177 }
 178
 179 /*
 180  * l_strncpy()
 181  *      copy src to dest up to len chars (stopping at first '\0').
 182  *      when src is shorter than len, pads to len with '\0'.
 183  * Return:
 184  *      number of chars copied. (Note this is a real performance win over
 185  *      doing a strncpy(), a strlen(), and then a possible memset())
 186  */
 187
 188 int
 189 l_strncpy(char *dest, const char *src, int len)
 190 {
 191         char *stop;
 192         char *start;
 193
 194         stop = dest + len;
 195         start = dest;
 196         while ((dest < stop) && (*src != '\0'))
 197                 *dest++ = *src++;
 198         len = dest - start;
 199         while (dest < stop)
 200                 *dest++ = '\0';
 201         return(len);
 202 }
 203
 204 /*
 205  * asc_ul()
 206  *      convert hex/octal character string into a u_long. We do not have to
 207  *      check for overflow! (the headers in all supported formats are not large
 208  *      enough to create an overflow).
 209  *      NOTE: strings passed to us are NOT TERMINATED.
 210  * Return:
 211  *      unsigned long value
 212  */
 213
 214 u_long
 215 asc_ul(char *str, int len, int base)
 216 {
 217         char *stop;
 218         u_long tval = 0;
 219
 220         stop = str + len;
 221
 222         /*
 223          * skip over leading blanks and zeros
 224          */
 225         while ((str < stop) && ((*str == ' ') || (*str == '0')))
 226                 ++str;
 227
 228         /*
 229          * for each valid digit, shift running value (tval) over to next digit
 230          * and add next digit
 231          */
 232         if (base == HEX) {
 233                 while (str < stop) {
 234                         if ((*str >= '0') && (*str <= '9'))
 235                                 tval = (tval << 4) + (*str++ - '0');
 236                         else if ((*str >= 'A') && (*str <= 'F'))
 237                                 tval = (tval << 4) + 10 + (*str++ - 'A');
 238                         else if ((*str >= 'a') && (*str <= 'f'))
 239                                 tval = (tval << 4) + 10 + (*str++ - 'a');
 240                         else
 241                                 break;
 242                 }
 243         } else {
 244                 while ((str < stop) && (*str >= '0') && (*str <= '7'))
 245                         tval = (tval << 3) + (*str++ - '0');
 246         }
 247         return(tval);
 248 }
 249
 250 /*
 251  * ul_asc()
 252  *      convert an unsigned long into an hex/oct ascii string. pads with LEADING
 253  *      ascii 0's to fill string completely
 254  *      NOTE: the string created is NOT TERMINATED.
 255  */
 256
 257 int
 258 ul_asc(u_long val, char *str, int len, int base)
 259 {
 260         char *pt;
 261         u_long digit;
 262
 263         /*
 264          * WARNING str is not '\0' terminated by this routine
 265          */
 266         pt = str + len - 1;
 267
 268         /*
 269          * do a tailwise conversion (start at right most end of string to place
 270          * least significant digit). Keep shifting until conversion value goes
 271          * to zero (all digits were converted)
 272          */
 273         if (base == HEX) {
 274                 while (pt >= str) {
 275                         if ((digit = (val & 0xf)) < 10)
 276                                 *pt-- = '0' + (char)digit;
 277                         else
 278                                 *pt-- = 'a' + (char)(digit - 10);
 279                         if ((val = (val >> 4)) == (u_long)0)
 280                                 break;
 281                 }
 282         } else {
 283                 while (pt >= str) {
 284                         *pt-- = '0' + (char)(val & 0x7);
 285                         if ((val = (val >> 3)) == (u_long)0)
 286                                 break;
 287                 }
 288         }
 289
 290         /*
 291          * pad with leading ascii ZEROS. We return -1 if we ran out of space.
 292          */
 293         while (pt >= str)
 294                 *pt-- = '0';
 295         if (val != (u_long)0)
 296                 return(-1);
 297         return(0);
 298 }
 299
 300 #ifndef NET2_STAT
 301 /*
 302  * asc_uqd()
 303  *      convert hex/octal character string into a u_quad_t. We do not have to
 304  *      check for overflow! (the headers in all supported formats are not large
 305  *      enough to create an overflow).
 306  *      NOTE: strings passed to us are NOT TERMINATED.
 307  * Return:
 308  *      u_quad_t value
 309  */
 310
 311 u_quad_t
 312 asc_uqd(char *str, int len, int base)
 313 {
 314         char *stop;
 315         u_quad_t tval = 0;
 316
 317         stop = str + len;
 318
 319         /*
 320          * skip over leading blanks and zeros
 321          */
 322         while ((str < stop) && ((*str == ' ') || (*str == '0')))
 323                 ++str;
 324
 325         /*
 326          * for each valid digit, shift running value (tval) over to next digit
 327          * and add next digit
 328          */
 329         if (base == HEX) {
 330                 while (str < stop) {
 331                         if ((*str >= '0') && (*str <= '9'))
 332                                 tval = (tval << 4) + (*str++ - '0');
 333                         else if ((*str >= 'A') && (*str <= 'F'))
 334                                 tval = (tval << 4) + 10 + (*str++ - 'A');
 335                         else if ((*str >= 'a') && (*str <= 'f'))
 336                                 tval = (tval << 4) + 10 + (*str++ - 'a');
 337                         else
 338                                 break;
 339                 }
 340         } else {
 341                 while ((str < stop) && (*str >= '0') && (*str <= '7'))
 342                         tval = (tval << 3) + (*str++ - '0');
 343         }
 344         return(tval);
 345 }
 346
 347 /*
 348  * uqd_asc()
 349  *      convert an u_quad_t into a hex/oct ascii string. pads with LEADING
 350  *      ascii 0's to fill string completely
 351  *      NOTE: the string created is NOT TERMINATED.
 352  */
 353
 354 int
 355 uqd_asc(u_quad_t val, char *str, int len, int base)
 356 {
 357         char *pt;
 358         u_quad_t digit;
 359
 360         /*
 361          * WARNING str is not '\0' terminated by this routine
 362          */
 363         pt = str + len - 1;
 364
 365         /*
 366          * do a tailwise conversion (start at right most end of string to place
 367          * least significant digit). Keep shifting until conversion value goes
 368          * to zero (all digits were converted)
 369          */
 370         if (base == HEX) {
 371                 while (pt >= str) {
 372                         if ((digit = (val & 0xf)) < 10)
 373                                 *pt-- = '0' + (char)digit;
 374                         else
 375                                 *pt-- = 'a' + (char)(digit - 10);
 376                         if ((val = (val >> 4)) == (u_quad_t)0)
 377                                 break;
 378                 }
 379         } else {
 380                 while (pt >= str) {
 381                         *pt-- = '0' + (char)(val & 0x7);
 382                         if ((val = (val >> 3)) == (u_quad_t)0)
 383                                 break;
 384                 }
 385         }
 386
 387         /*
 388          * pad with leading ascii ZEROS. We return -1 if we ran out of space.
 389          */
 390         while (pt >= str)
 391                 *pt-- = '0';
 392         if (val != (u_quad_t)0)
 393                 return(-1);
 394         return(0);
 395 }
 396 #endif