commands/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
  40 #include <sys/types.h>
  41 #include <sys/time.h>
  42 #include <sys/stat.h>
  43 #include <stdint.h>
  44 #include <stdio.h>
  45 #include <utmp.h>
  46 #include <unistd.h>
  47 #include <stdlib.h>
  48 #include <string.h>
  49 #include <time.h>
  50 #include "pax.h"
  51 #include "extern.h"
  52
  53 /*
  54  * a collection of general purpose subroutines used by pax
  55  */
  56
  57 /*
  58  * constants used by ls_list() when printing out archive members
  59  */
  60 #define MODELEN 20
  61 #define DATELEN 64
  62 #define SIXMONTHS        ((365 / 2) * 86400)
  63 #define CURFRMTM        "%b %e %H:%M"
  64 #define OLDFRMTM        "%b %e  %Y"
  65 #define CURFRMTD        "%e %b %H:%M"
  66 #define OLDFRMTD        "%e %b  %Y"
  67 #ifndef UT_NAMESIZE
  68 #define UT_NAMESIZE     8
  69 #endif
  70 #define UT_GRPSIZE      6
  71
  72 static int d_first = -1;
  73
  74 /*
  75  * ls_list()
  76  *      list the members of an archive in ls format
  77  */
  78
  79 void
  80 ls_list(ARCHD *arcn, time_t now, FILE *fp)
  81 {
  82         struct stat *sbp;
  83         char f_mode[MODELEN];
  84         char f_date[DATELEN];
  85         const char *timefrmt;
  86
  87         /*
  88          * if not verbose, just print the file name
  89          */
  90         if (!vflag) {
  91                 (void)fprintf(fp, "%s\n", arcn->name);
  92                 (void)fflush(fp);
  93                 return;
  94         }
  95
  96         if (d_first < 0)
  97                 d_first = 0;
  98         /*
  99          * user wants long mode
 100          */
 101         sbp = &(arcn->sb);
 102 #if 0
 103         strmode(sbp->st_mode, f_mode);
 104 #else
 105         strcpy(f_mode, "");
 106 #endif
 107
 108         /*
 109          * time format based on age compared to the time pax was started.
 110          */
 111         if ((sbp->st_mtime + SIXMONTHS) <= now)
 112                 timefrmt = d_first ? OLDFRMTD : OLDFRMTM;
 113         else
 114                 timefrmt = d_first ? CURFRMTD : CURFRMTM;
 115
 116         /*
 117          * print file mode, link count, uid, gid and time
 118          */
 119 #if 0
 120         if (strftime(f_date,DATELEN,timefrmt,localtime(&(sbp->st_mtime))) == 0)
 121 #endif
 122                 f_date[0] = '\0';
 123         (void)fprintf(fp, "%s%2u %-*s %-*s ", f_mode, sbp->st_nlink,
 124                 UT_NAMESIZE, name_uid(sbp->st_uid, 1), UT_GRPSIZE,
 125                 name_gid(sbp->st_gid, 1));
 126
 127         /*
 128          * print device id's for devices, or sizes for other nodes
 129          */
 130         if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK))
 131 #               ifdef NET2_STAT
 132                 (void)fprintf(fp, "%4u,%4u ", major(sbp->st_rdev),
 133                     minor(sbp->st_rdev));
 134 #               else
 135                 (void)fprintf(fp, "%4lu,%4lu ", (unsigned long)major(sbp->st_rdev),
 136                     (unsigned long)minor(sbp->st_rdev));
 137 #               endif
 138         else {
 139 #               ifdef NET2_STAT
 140                 (void)fprintf(fp, "%9lu ", sbp->st_size);
 141 #               else
 142                 (void)fprintf(fp, "%9ju ", (uintmax_t)sbp->st_size);
 143 #               endif
 144         }
 145
 146         /*
 147          * print name and link info for hard and soft links
 148          */
 149         (void)fprintf(fp, "%s %s", f_date, arcn->name);
 150         if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG))
 151                 (void)fprintf(fp, " == %s\n", arcn->ln_name);
 152         else if (arcn->type == PAX_SLK)
 153                 (void)fprintf(fp, " => %s\n", arcn->ln_name);
 154         else
 155                 (void)putc('\n', fp);
 156         (void)fflush(fp);
 157         return;
 158 }
 159
 160 /*
 161  * tty_ls()
 162  *      print a short summary of file to tty.
 163  */
 164
 165 void
 166 ls_tty(ARCHD *arcn)
 167 {
 168         char f_date[DATELEN];
 169         char f_mode[MODELEN];
 170         const char *timefrmt;
 171
 172         if (d_first < 0)
 173                 d_first = 0;
 174
 175         if ((arcn->sb.st_mtime + SIXMONTHS) <= time(NULL))
 176                 timefrmt = d_first ? OLDFRMTD : OLDFRMTM;
 177         else
 178                 timefrmt = d_first ? CURFRMTD : CURFRMTM;
 179
 180         /*
 181          * convert time to string, and print
 182          */
 183 #if 0
 184         if (strftime(f_date, DATELEN, timefrmt,
 185             localtime(&(arcn->sb.st_mtime))) == 0)
 186 #endif
 187                 f_date[0] = '\0';
 188 #if 0
 189         strmode(arcn->sb.st_mode, f_mode);
 190 #else
 191         strcpy(f_mode, "");
 192 #endif
 193         tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
 194         return;
 195 }
 196
 197 /*
 198  * l_strncpy()
 199  *      copy src to dest up to len chars (stopping at first '\0').
 200  *      when src is shorter than len, pads to len with '\0'.
 201  * Return:
 202  *      number of chars copied. (Note this is a real performance win over
 203  *      doing a strncpy(), a strlen(), and then a possible memset())
 204  */
 205
 206 int
 207 l_strncpy(char *dest, const char *src, int len)
 208 {
 209         char *stop;
 210         char *start;
 211
 212         stop = dest + len;
 213         start = dest;
 214         while ((dest < stop) && (*src != '\0'))
 215                 *dest++ = *src++;
 216         len = dest - start;
 217         while (dest < stop)
 218                 *dest++ = '\0';
 219         return(len);
 220 }
 221
 222 /*
 223  * asc_ul()
 224  *      convert hex/octal character string into a u_long. We do not have to
 225  *      check for overflow! (the headers in all supported formats are not large
 226  *      enough to create an overflow).
 227  *      NOTE: strings passed to us are NOT TERMINATED.
 228  * Return:
 229  *      unsigned long value
 230  */
 231
 232 u_long
 233 asc_ul(char *str, int len, int base)
 234 {
 235         char *stop;
 236         u_long tval = 0;
 237
 238         stop = str + len;
 239
 240         /*
 241          * skip over leading blanks and zeros
 242          */
 243         while ((str < stop) && ((*str == ' ') || (*str == '0')))
 244                 ++str;
 245
 246         /*
 247          * for each valid digit, shift running value (tval) over to next digit
 248          * and add next digit
 249          */
 250         if (base == HEX) {
 251                 while (str < stop) {
 252                         if ((*str >= '0') && (*str <= '9'))
 253                                 tval = (tval << 4) + (*str++ - '0');
 254                         else if ((*str >= 'A') && (*str <= 'F'))
 255                                 tval = (tval << 4) + 10 + (*str++ - 'A');
 256                         else if ((*str >= 'a') && (*str <= 'f'))
 257                                 tval = (tval << 4) + 10 + (*str++ - 'a');
 258                         else
 259                                 break;
 260                 }
 261         } else {
 262                 while ((str < stop) && (*str >= '0') && (*str <= '7'))
 263                         tval = (tval << 3) + (*str++ - '0');
 264         }
 265         return(tval);
 266 }
 267
 268 /*
 269  * ul_asc()
 270  *      convert an unsigned long into an hex/oct ascii string. pads with LEADING
 271  *      ascii 0's to fill string completely
 272  *      NOTE: the string created is NOT TERMINATED.
 273  */
 274
 275 int
 276 ul_asc(u_long val, char *str, int len, int base)
 277 {
 278         char *pt;
 279         u_long digit;
 280
 281         /*
 282          * WARNING str is not '\0' terminated by this routine
 283          */
 284         pt = str + len - 1;
 285
 286         /*
 287          * do a tailwise conversion (start at right most end of string to place
 288          * least significant digit). Keep shifting until conversion value goes
 289          * to zero (all digits were converted)
 290          */
 291         if (base == HEX) {
 292                 while (pt >= str) {
 293                         if ((digit = (val & 0xf)) < 10)
 294                                 *pt-- = '0' + (char)digit;
 295                         else
 296                                 *pt-- = 'a' + (char)(digit - 10);
 297                         if ((val = (val >> 4)) == (u_long)0)
 298                                 break;
 299                 }
 300         } else {
 301                 while (pt >= str) {
 302                         *pt-- = '0' + (char)(val & 0x7);
 303                         if ((val = (val >> 3)) == (u_long)0)
 304                                 break;
 305                 }
 306         }
 307
 308         /*
 309          * pad with leading ascii ZEROS. We return -1 if we ran out of space.
 310          */
 311         while (pt >= str)
 312                 *pt-- = '0';
 313         if (val != (u_long)0)
 314                 return(-1);
 315         return(0);
 316 }
 317
 318 #ifndef NET2_STAT
 319 /*
 320  * asc_uqd()
 321  *      convert hex/octal character string into a u_quad_t. We do not have to
 322  *      check for overflow! (the headers in all supported formats are not large
 323  *      enough to create an overflow).
 324  *      NOTE: strings passed to us are NOT TERMINATED.
 325  * Return:
 326  *      u_quad_t value
 327  */
 328
 329 u_quad_t
 330 asc_uqd(char *str, int len, int base)
 331 {
 332         char *stop;
 333         u_quad_t tval = 0;
 334
 335         stop = str + len;
 336
 337         /*
 338          * skip over leading blanks and zeros
 339          */
 340         while ((str < stop) && ((*str == ' ') || (*str == '0')))
 341                 ++str;
 342
 343         /*
 344          * for each valid digit, shift running value (tval) over to next digit
 345          * and add next digit
 346          */
 347         if (base == HEX) {
 348                 while (str < stop) {
 349                         if ((*str >= '0') && (*str <= '9'))
 350                                 tval = (tval << 4) + (*str++ - '0');
 351                         else if ((*str >= 'A') && (*str <= 'F'))
 352                                 tval = (tval << 4) + 10 + (*str++ - 'A');
 353                         else if ((*str >= 'a') && (*str <= 'f'))
 354                                 tval = (tval << 4) + 10 + (*str++ - 'a');
 355                         else
 356                                 break;
 357                 }
 358         } else {
 359                 while ((str < stop) && (*str >= '0') && (*str <= '7'))
 360                         tval = (tval << 3) + (*str++ - '0');
 361         }
 362         return(tval);
 363 }
 364
 365 /*
 366  * uqd_asc()
 367  *      convert an u_quad_t into a hex/oct ascii string. pads with LEADING
 368  *      ascii 0's to fill string completely
 369  *      NOTE: the string created is NOT TERMINATED.
 370  */
 371
 372 int
 373 uqd_asc(u_quad_t val, char *str, int len, int base)
 374 {
 375         char *pt;
 376         u_quad_t digit;
 377
 378         /*
 379          * WARNING str is not '\0' terminated by this routine
 380          */
 381         pt = str + len - 1;
 382
 383         /*
 384          * do a tailwise conversion (start at right most end of string to place
 385          * least significant digit). Keep shifting until conversion value goes
 386          * to zero (all digits were converted)
 387          */
 388         if (base == HEX) {
 389                 while (pt >= str) {
 390                         if ((digit = (val & 0xf)) < 10)
 391                                 *pt-- = '0' + (char)digit;
 392                         else
 393                                 *pt-- = 'a' + (char)(digit - 10);
 394                         if ((val = (val >> 4)) == (u_quad_t)0)
 395                                 break;
 396                 }
 397         } else {
 398                 while (pt >= str) {
 399                         *pt-- = '0' + (char)(val & 0x7);
 400                         if ((val = (val >> 3)) == (u_quad_t)0)
 401                                 break;
 402                 }
 403         }
 404
 405         /*
 406          * pad with leading ascii ZEROS. We return -1 if we ran out of space.
 407          */
 408         while (pt >= str)
 409                 *pt-- = '0';
 410         if (val != (u_quad_t)0)
 411                 return(-1);
 412         return(0);
 413 }
 414 #endif