file_cmds/pax/gen_subs.c

   1 /*      $OpenBSD: gen_subs.c,v 1.19 2007/04/04 21:55:10 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 #include <sys/cdefs.h>
  38 #ifndef lint
  39 #if 0
  40 static const char sccsid[] = "@(#)gen_subs.c    8.1 (Berkeley) 5/31/93";
  41 #else
  42 __used static const char rcsid[] = "$OpenBSD: gen_subs.c,v 1.19 2007/04/04 21:55:10 millert Exp $";
  43 #endif
  44 #endif /* not lint */
  45
  46 #include <sys/types.h>
  47 #include <sys/time.h>
  48 #include <sys/stat.h>
  49 #include <sys/param.h>
  50 #include <stdio.h>
  51 #include <tzfile.h>
  52 #include <unistd.h>
  53 #include <stdlib.h>
  54 #include <string.h>
  55 #include <vis.h>
  56 #include <langinfo.h>
  57 #include "pax.h"
  58 #include "extern.h"
  59
  60 /*
  61  * a collection of general purpose subroutines used by pax
  62  */
  63
  64 /*
  65  * constants used by ls_list() when printing out archive members
  66  */
  67 #define MODELEN 20
  68 #define DATELEN 64
  69 #define SIXMONTHS        ((DAYSPERNYEAR / 2) * SECSPERDAY)
  70 #define CURFRMTM        "%b %e %H:%M"
  71 #define OLDFRMTM        "%b %e  %Y"
  72 #define CURFRMTD        "%e %b %H:%M"
  73 #define OLDFRMTD        "%e %b  %Y"
  74 #define NAME_WIDTH      8
  75
  76 static int d_first = -1;
  77
  78 /*
  79  * ls_list()
  80  *      list the members of an archive in ls format
  81  */
  82
  83 void
  84 ls_list(ARCHD *arcn, time_t now, FILE *fp)
  85 {
  86         struct stat *sbp;
  87         char f_mode[MODELEN];
  88         char f_date[DATELEN];
  89         const char *timefrmt;
  90         int term;
  91
  92         term = zeroflag ? '\0' : '\n';  /* path termination character */
  93
  94         /*
  95          * if not verbose, just print the file name
  96          */
  97         if (!vflag) {
  98                 if (zeroflag)
  99                         (void)fputs(arcn->name, fp);
 100                 else
 101                         safe_print(arcn->name, fp);
 102                 (void)putc(term, fp);
 103                 (void)fflush(fp);
 104                 return;
 105         }
 106
 107         if (pax_list_opt_format) {
 108                 pax_format_list_output(arcn, now, fp, term);
 109                 return;
 110         }
 111
 112         if (d_first < 0)
 113                 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
 114         /*
 115          * user wants long mode
 116          */
 117         sbp = &(arcn->sb);
 118         strmode(sbp->st_mode, f_mode);
 119
 120         /*
 121          * time format based on age compared to the time pax was started.
 122          */
 123         if ((sbp->st_mtime + SIXMONTHS) <= now ||
 124                 sbp->st_mtime > now)
 125                 timefrmt = d_first ? OLDFRMTD : OLDFRMTM;
 126         else
 127                 timefrmt = d_first ? CURFRMTD : CURFRMTM;
 128
 129         /*
 130          * print file mode, link count, uid, gid and time
 131          */
 132         if (strftime(f_date,DATELEN,timefrmt,localtime(&(sbp->st_mtime))) == 0)
 133                 f_date[0] = '\0';
 134 #define UT_NAMESIZE 8
 135         (void)fprintf(fp, "%s%2u %-*.*s %-*.*s ", f_mode, sbp->st_nlink,
 136                 NAME_WIDTH, UT_NAMESIZE, name_uid(sbp->st_uid, 1),
 137                 NAME_WIDTH, UT_NAMESIZE, name_gid(sbp->st_gid, 1));
 138
 139         /*
 140          * print device id's for devices, or sizes for other nodes
 141          */
 142         if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK))
 143 #               ifdef LONG_OFF_T
 144                 (void)fprintf(fp, "%4u,%4u ", MAJOR(sbp->st_rdev),
 145 #               else
 146                 (void)fprintf(fp, "%4lu,%4lu ", (unsigned long)MAJOR(sbp->st_rdev),
 147 #               endif
 148                     (unsigned long)MINOR(sbp->st_rdev));
 149         else {
 150                 /*
 151                  * UNIX compliance fix: printing filename length for soft links
 152                  * from arcn->ln_nlen instead of sbp->st_size, which is 0.
 153                  */
 154                 off_t nlen;
 155                 if (arcn->type == PAX_SLK) {
 156                         nlen = arcn->ln_nlen;
 157                 } else {
 158                         nlen = sbp->st_size;
 159                 }
 160 #               ifdef LONG_OFF_T
 161                 (void)fprintf(fp, "%9lu ", nlen);
 162 #               else
 163                 (void)fprintf(fp, "%9qu ", nlen);
 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         const char *timefrmt;
 196
 197         if (d_first < 0)
 198                 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
 199
 200         if ((arcn->sb.st_mtime + SIXMONTHS) <= time(NULL))
 201                 timefrmt = d_first ? OLDFRMTD : OLDFRMTM;
 202         else
 203                 timefrmt = d_first ? CURFRMTD : CURFRMTM;
 204
 205         /*
 206          * convert time to string, and print
 207          */
 208         if (strftime(f_date, DATELEN, timefrmt,
 209             localtime(&(arcn->sb.st_mtime))) == 0)
 210                 f_date[0] = '\0';
 211         strmode(arcn->sb.st_mode, f_mode);
 212         tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name);
 213         return;
 214 }
 215
 216 void
 217 safe_print(const char *str, FILE *fp)
 218 {
 219         /*
 220          * if printing to a tty, use strvis(3) to print special characters.
 221          */
 222         if (isatty(fileno(fp))) {
 223                 /*
 224                  * The size of visbuf must be four times the number
 225                  * of bytes encoded from str (plus one for the NUL).
 226                  */
 227                 char *visbuf = (char *) malloc(sizeof(char) * (4 * strlen(str) + 1));
 228                 if (visbuf == NULL) {
 229                         paxwarn(1, "Out of memory");
 230                         return;
 231                 }
 232                 /*
 233                  * using strvis(3) instead of vis(3) to account for multibyte
 234                  * characters
 235                  */
 236                 (void)strvis(visbuf, str, VIS_CSTYLE);
 237                 (void)fputs(visbuf, fp);
 238                 free(visbuf);
 239         } else {
 240                 (void)fputs(str, fp);
 241         }
 242 }
 243
 244 /*
 245  * asc_ul()
 246  *      convert hex/octal character string into a u_long. We do not have to
 247  *      check for overflow! (the headers in all supported formats are not large
 248  *      enough to create an overflow).
 249  *      NOTE: strings passed to us are NOT TERMINATED.
 250  * Return:
 251  *      unsigned long value
 252  */
 253
 254 u_long
 255 asc_ul(char *str, int len, int base)
 256 {
 257         char *stop;
 258         u_long tval = 0;
 259
 260         stop = str + len;
 261
 262         /*
 263          * skip over leading blanks and zeros
 264          */
 265         while ((str < stop) && ((*str == ' ') || (*str == '0')))
 266                 ++str;
 267
 268         /*
 269          * for each valid digit, shift running value (tval) over to next digit
 270          * and add next digit
 271          */
 272         if (base == HEX) {
 273                 while (str < stop) {
 274                         if ((*str >= '0') && (*str <= '9'))
 275                                 tval = (tval << 4) + (*str++ - '0');
 276                         else if ((*str >= 'A') && (*str <= 'F'))
 277                                 tval = (tval << 4) + 10 + (*str++ - 'A');
 278                         else if ((*str >= 'a') && (*str <= 'f'))
 279                                 tval = (tval << 4) + 10 + (*str++ - 'a');
 280                         else
 281                                 break;
 282                 }
 283         } else {
 284                 while ((str < stop) && (*str >= '0') && (*str <= '7'))
 285                         tval = (tval << 3) + (*str++ - '0');
 286         }
 287         return(tval);
 288 }
 289
 290 /*
 291  * ul_asc()
 292  *      convert an unsigned long into an hex/oct ascii string. pads with LEADING
 293  *      ascii 0's to fill string completely
 294  *      NOTE: the string created is NOT TERMINATED.
 295  */
 296
 297 int
 298 ul_asc(u_long val, char *str, int len, int base)
 299 {
 300         char *pt;
 301         u_long digit;
 302
 303         /*
 304          * WARNING str is not '\0' terminated by this routine
 305          */
 306         pt = str + len - 1;
 307
 308         /*
 309          * do a tailwise conversion (start at right most end of string to place
 310          * least significant digit). Keep shifting until conversion value goes
 311          * to zero (all digits were converted)
 312          */
 313         if (base == HEX) {
 314                 while (pt >= str) {
 315                         if ((digit = (val & 0xf)) < 10)
 316                                 *pt-- = '0' + (char)digit;
 317                         else
 318                                 *pt-- = 'a' + (char)(digit - 10);
 319                         if ((val = (val >> 4)) == (u_long)0)
 320                                 break;
 321                 }
 322         } else {
 323                 while (pt >= str) {
 324                         *pt-- = '0' + (char)(val & 0x7);
 325                         if ((val = (val >> 3)) == (u_long)0)
 326                                 break;
 327                 }
 328         }
 329
 330         /*
 331          * pad with leading ascii ZEROS. We return -1 if we ran out of space.
 332          */
 333         while (pt >= str)
 334                 *pt-- = '0';
 335         if (val != (u_long)0)
 336                 return(-1);
 337         return(0);
 338 }
 339
 340 #ifndef LONG_OFF_T
 341 /*
 342  * asc_uqd()
 343  *      convert hex/octal character string into a u_quad_t. We do not have to
 344  *      check for overflow! (the headers in all supported formats are not large
 345  *      enough to create an overflow).
 346  *      NOTE: strings passed to us are NOT TERMINATED.
 347  * Return:
 348  *      u_quad_t value
 349  */
 350
 351 u_quad_t
 352 asc_uqd(char *str, int len, int base)
 353 {
 354         char *stop;
 355         u_quad_t tval = 0;
 356
 357         stop = str + len;
 358
 359         /*
 360          * skip over leading blanks and zeros
 361          */
 362         while ((str < stop) && ((*str == ' ') || (*str == '0')))
 363                 ++str;
 364
 365         /*
 366          * for each valid digit, shift running value (tval) over to next digit
 367          * and add next digit
 368          */
 369         if (base == HEX) {
 370                 while (str < stop) {
 371                         if ((*str >= '0') && (*str <= '9'))
 372                                 tval = (tval << 4) + (*str++ - '0');
 373                         else if ((*str >= 'A') && (*str <= 'F'))
 374                                 tval = (tval << 4) + 10 + (*str++ - 'A');
 375                         else if ((*str >= 'a') && (*str <= 'f'))
 376                                 tval = (tval << 4) + 10 + (*str++ - 'a');
 377                         else
 378                                 break;
 379                 }
 380         } else {
 381                 while ((str < stop) && (*str >= '0') && (*str <= '7'))
 382                         tval = (tval << 3) + (*str++ - '0');
 383         }
 384         return(tval);
 385 }
 386
 387 /*
 388  * uqd_asc()
 389  *      convert an u_quad_t into a hex/oct ascii string. pads with LEADING
 390  *      ascii 0's to fill string completely
 391  *      NOTE: the string created is NOT TERMINATED.
 392  */
 393
 394 int
 395 uqd_asc(u_quad_t val, char *str, int len, int base)
 396 {
 397         char *pt;
 398         u_quad_t digit;
 399
 400         /*
 401          * WARNING str is not '\0' terminated by this routine
 402          */
 403         pt = str + len - 1;
 404
 405         /*
 406          * do a tailwise conversion (start at right most end of string to place
 407          * least significant digit). Keep shifting until conversion value goes
 408          * to zero (all digits were converted)
 409          */
 410         if (base == HEX) {
 411                 while (pt >= str) {
 412                         if ((digit = (val & 0xf)) < 10)
 413                                 *pt-- = '0' + (char)digit;
 414                         else
 415                                 *pt-- = 'a' + (char)(digit - 10);
 416                         if ((val = (val >> 4)) == (u_quad_t)0)
 417                                 break;
 418                 }
 419         } else {
 420                 while (pt >= str) {
 421                         *pt-- = '0' + (char)(val & 0x7);
 422                         if ((val = (val >> 3)) == (u_quad_t)0)
 423                                 break;
 424                 }
 425         }
 426
 427         /*
 428          * pad with leading ascii ZEROS. We return -1 if we ran out of space.
 429          */
 430         while (pt >= str)
 431                 *pt-- = '0';
 432         if (val != (u_quad_t)0)
 433                 return(-1);
 434         return(0);
 435 }
 436 #endif
 437
 438 /*
 439  * Copy at max min(bufz, fieldsz) chars from field to buf, stopping
 440  * at the first NUL char. NUL terminate buf if there is room left.
 441  */
 442 size_t
 443 fieldcpy(char *buf, size_t bufsz, const char *field, size_t fieldsz)
 444 {
 445         char *p = buf;
 446         const char *q = field;
 447         size_t i = 0;
 448
 449         if (fieldsz > bufsz)
 450                 fieldsz = bufsz;
 451         while (i < fieldsz && *q != '\0') {
 452                 *p++ = *q++;
 453                 i++;
 454         }
 455         if (i < bufsz)
 456                 *p = '\0';
 457         return(i);
 458 }