pax/gen_subs.c

   1 /*      $OpenBSD: gen_subs.c,v 1.17 2003/06/13 17:51:14 millert 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. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #ifndef lint
  38 #if 0
  39 static const char sccsid[] = "@(#)gen_subs.c    8.1 (Berkeley) 5/31/93";
  40 #else
  41 static const char rcsid[] __attribute__((__unused__)) = "$OpenBSD: gen_subs.c,v 1.17 2003/06/13 17:51:14 millert Exp $";
  42 #endif
  43 #endif /* not lint */
  44
  45 #include <sys/types.h>
  46 #include <sys/time.h>
  47 #include <sys/stat.h>
  48 #include <sys/param.h>
  49 #include <stdio.h>
  50 #include <tzfile.h>
  51 #include <utmp.h>
  52 #include <unistd.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55 #include <vis.h>
  56 #include "pax.h"
  57 #include "extern.h"
  58
  59 /*
  60  * a collection of general purpose subroutines used by pax
  61  */
  62
  63 /*
  64  * constants used by ls_list() when printing out archive members
  65  */
  66 #define MODELEN 20
  67 #define DATELEN 64
  68 #define SIXMONTHS        ((DAYSPERNYEAR / 2) * SECSPERDAY)
  69 #define CURFRMT         "%b %e %H:%M"
  70 #define OLDFRMT         "%b %e  %Y"
  71 #define NAME_WIDTH      8
  72
  73 /*
  74  * format_date
  75  *       format date of file for printing
  76  */
  77
  78 static void
  79 format_date(char * f_date, time_t file_time, time_t current)
  80 {
  81         const char *timefrmt;
  82
  83         if (ltmfrmt == NULL) {
  84                 /*
  85                  * no locale specified format.
  86                  */
  87                 /* use the same format that ls -l uses */
  88                 if ((file_time + SIXMONTHS) <= current || file_time > current)
  89                         timefrmt = OLDFRMT;
  90                 else
  91                         timefrmt = CURFRMT;
  92         } else
  93                 timefrmt = ltmfrmt;
  94
  95         /*
  96          * convert time to string for printing
  97          */
  98         if (strftime(f_date,DATELEN,timefrmt,localtime((const time_t *)&(file_time))) == 0)
  99                 *f_date = '\0';
 100 }
 101
 102 /*
 103  * ls_list()
 104  *      list the members of an archive in ls format
 105  */
 106
 107 void
 108 ls_list(ARCHD *arcn, time_t now, FILE *fp)
 109 {
 110         struct stat *sbp;
 111         char f_mode[MODELEN];
 112         char f_date[DATELEN];
 113         int term;
 114
 115         term = zeroflag ? '\0' : '\n';  /* path termination character */
 116
 117         /*
 118          * if not verbose, just print the file name
 119          */
 120         if (!vflag) {
 121                 if (zeroflag)
 122                         (void)fputs(arcn->name, fp);
 123                 else
 124                         safe_print(arcn->name, fp);
 125                 (void)putc(term, fp);
 126                 (void)fflush(fp);
 127                 return;
 128         }
 129
 130         if (pax_list_opt_format) {
 131                 pax_format_list_output(arcn, now, fp, term);
 132                 return;
 133         }
 134         /*
 135          * user wants long mode
 136          */
 137         sbp = &(arcn->sb);
 138         strmode(sbp->st_mode, f_mode);
 139
 140         format_date(&f_date[0], sbp->st_mtime, now);
 141
 142         /*
 143          * print file mode, link count, uid, gid and time
 144          */
 145         (void)fprintf(fp, "%s%2u %-*.*s %-*.*s ", f_mode, sbp->st_nlink,
 146                 NAME_WIDTH, UT_NAMESIZE, name_uid(sbp->st_uid, 1),
 147                 NAME_WIDTH, UT_NAMESIZE, name_gid(sbp->st_gid, 1));
 148
 149         /*
 150          * print device id's for devices, or sizes for other nodes
 151          */
 152         if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK))
 153 #               ifdef LONG_OFF_T
 154                 (void)fprintf(fp, "%4u,%4u ", MAJOR(sbp->st_rdev),
 155 #               else
 156                 (void)fprintf(fp, "%4lu,%4lu ", (unsigned long)MAJOR(sbp->st_rdev),
 157 #               endif
 158                     (unsigned long)MINOR(sbp->st_rdev));
 159         else {
 160 #               ifdef LONG_OFF_T
 161                 (void)fprintf(fp, "%9lu ", sbp->st_size);
 162 #               else
 163                 (void)fprintf(fp, "%9qu ", sbp->st_size);
 164 #               endif
 165         }
 166
 167         /*
 168          * print name and link info for hard and soft links
 169          */
 170         (void)fputs(f_date, fp);
 171         (void)putc(' ', fp);
 172         safe_print(arcn->name, fp);
 173         if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG)) {
 174                 fputs(" == ", fp);
 175                 safe_print(arcn->ln_name, fp);
 176         } else if (arcn->type == PAX_SLK) {
 177                 fputs(" => ", fp);
 178                 safe_print(arcn->ln_name, fp);
 179         }
 180         (void)putc(term, fp);
 181         (void)fflush(fp);
 182         return;
 183 }
 184
 185 /*
 186  * tty_ls()
 187  *      print a short summary of file to tty.
 188  */
 189
 190 void
 191 ls_tty(ARCHD *arcn)
 192 {
 193         char f_date[DATELEN];
 194         char f_mode[MODELEN];
 195
 196         format_date(&f_date[0], arcn->sb.st_mtime, time(NULL));
 197
 198         strmode(arcn->sb.st_mode, f_mode);
 199         tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
 200         return;
 201 }
 202
 203 void
 204 safe_print(const char *str, FILE *fp)
 205 {
 206         char visbuf[5];
 207         const char *cp;
 208
 209         /*
 210          * if printing to a tty, use vis(3) to print special characters.
 211          */
 212         if (isatty(fileno(fp))) {
 213                 for (cp = str; *cp; cp++) {
 214                         (void)vis(visbuf, cp[0], VIS_CSTYLE, cp[1]);
 215                         (void)fputs(visbuf, fp);
 216                 }
 217         } else {
 218                 (void)fputs(str, fp);
 219         }
 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 LONG_OFF_T
 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