1 /* $NetBSD: gen_subs.c,v 1.36 2012/08/09 08:09:21 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1992 Keith Muller. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Keith Muller of the University of California, San Diego. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #if HAVE_NBTOOL_CONFIG_H 37 #include "nbtool_config.h" 38 #endif 39 40 #include <sys/cdefs.h> 41 #if !defined(lint) 42 #if 0 43 static char sccsid[] = "@(#)gen_subs.c 8.1 (Berkeley) 5/31/93"; 44 #else 45 __RCSID("$NetBSD: gen_subs.c,v 1.36 2012/08/09 08:09:21 christos 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 54 #include <ctype.h> 55 #include <grp.h> 56 #include <pwd.h> 57 #include <vis.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <time.h> 62 #include <tzfile.h> 63 #include <unistd.h> 64 65 #include "pax.h" 66 #include "extern.h" 67 68 /* 69 * a collection of general purpose subroutines used by pax 70 */ 71 72 /* 73 * constants used by ls_list() when printing out archive members 74 */ 75 #define MODELEN 20 76 #define DATELEN 64 77 #define SIXMONTHS ((DAYSPERNYEAR / 2) * SECSPERDAY) 78 #define CURFRMT "%b %e %H:%M" 79 #define OLDFRMT "%b %e %Y" 80 #ifndef UT_NAMESIZE 81 #define UT_NAMESIZE 8 82 #endif 83 #define UT_GRPSIZE 6 84 85 /* 86 * convert time to string 87 */ 88 static void 89 formattime(char *buf, size_t buflen, time_t when) 90 { 91 int error; 92 struct tm tm; 93 (void)localtime_r(&when, &tm); 94 95 if (when + SIXMONTHS <= time(NULL)) 96 error = strftime(buf, buflen, OLDFRMT, &tm); 97 else 98 error = strftime(buf, buflen, CURFRMT, &tm); 99 100 if (error == 0) 101 buf[0] = '\0'; 102 } 103 104 /* 105 * ls_list() 106 * list the members of an archive in ls format 107 */ 108 109 void 110 ls_list(ARCHD *arcn, time_t now, FILE *fp) 111 { 112 struct stat *sbp; 113 char f_mode[MODELEN]; 114 char f_date[DATELEN]; 115 const char *user, *group; 116 117 /* 118 * if not verbose, just print the file name 119 */ 120 if (!vflag) { 121 (void)fprintf(fp, "%s\n", arcn->name); 122 (void)fflush(fp); 123 return; 124 } 125 126 /* 127 * user wants long mode 128 */ 129 sbp = &(arcn->sb); 130 strmode(sbp->st_mode, f_mode); 131 132 /* 133 * time format based on age compared to the time pax was started. 134 */ 135 formattime(f_date, sizeof(f_date), arcn->sb.st_mtime); 136 /* 137 * print file mode, link count, uid, gid and time 138 */ 139 user = user_from_uid(sbp->st_uid, 0); 140 group = group_from_gid(sbp->st_gid, 0); 141 (void)fprintf(fp, "%s%2lu %-*s %-*s ", f_mode, 142 (unsigned long)sbp->st_nlink, 143 UT_NAMESIZE, user ? user : "", UT_GRPSIZE, group ? group : ""); 144 145 /* 146 * print device id's for devices, or sizes for other nodes 147 */ 148 if ((arcn->type == PAX_CHR) || (arcn->type == PAX_BLK)) 149 (void)fprintf(fp, "%4lu,%4lu ", (long) MAJOR(sbp->st_rdev), 150 (long) MINOR(sbp->st_rdev)); 151 else { 152 (void)fprintf(fp, OFFT_FP("9") " ", (OFFT_T)sbp->st_size); 153 } 154 155 /* 156 * print name and link info for hard and soft links 157 */ 158 (void)fprintf(fp, "%s %s", f_date, arcn->name); 159 if ((arcn->type == PAX_HLK) || (arcn->type == PAX_HRG)) 160 (void)fprintf(fp, " == %s\n", arcn->ln_name); 161 else if (arcn->type == PAX_SLK) 162 (void)fprintf(fp, " -> %s\n", arcn->ln_name); 163 else 164 (void)fputc('\n', fp); 165 (void)fflush(fp); 166 } 167 168 /* 169 * tty_ls() 170 * print a short summary of file to tty. 171 */ 172 173 void 174 ls_tty(ARCHD *arcn) 175 { 176 char f_date[DATELEN]; 177 char f_mode[MODELEN]; 178 179 formattime(f_date, sizeof(f_date), arcn->sb.st_mtime); 180 strmode(arcn->sb.st_mode, f_mode); 181 tty_prnt("%s%s %s\n", f_mode, f_date, arcn->name); 182 return; 183 } 184 185 void 186 safe_print(const char *str, FILE *fp) 187 { 188 char visbuf[5]; 189 const char *cp; 190 191 /* 192 * if printing to a tty, use vis(3) to print special characters. 193 */ 194 if (isatty(fileno(fp))) { 195 for (cp = str; *cp; cp++) { 196 (void)vis(visbuf, cp[0], VIS_CSTYLE, cp[1]); 197 (void)fputs(visbuf, fp); 198 } 199 } else { 200 (void)fputs(str, fp); 201 } 202 } 203 204 /* 205 * asc_u32() 206 * convert hex/octal character string into a uint32_t. 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 * uint32_t value 212 */ 213 214 uint32_t 215 asc_u32(char *str, int len, int base) 216 { 217 char *stop; 218 uint32_t 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 * u32_asc() 252 * convert an uintmax_t 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 u32_asc(uintmax_t val, char *str, int len, int base) 259 { 260 char *pt; 261 uint32_t digit; 262 uintmax_t p; 263 264 p = val & TOP_HALF; 265 if (p && p != TOP_HALF) 266 return -1; 267 268 val &= BOTTOM_HALF; 269 270 /* 271 * WARNING str is not '\0' terminated by this routine 272 */ 273 pt = str + len - 1; 274 275 /* 276 * do a tailwise conversion (start at right most end of string to place 277 * least significant digit). Keep shifting until conversion value goes 278 * to zero (all digits were converted) 279 */ 280 if (base == HEX) { 281 while (pt >= str) { 282 if ((digit = (val & 0xf)) < 10) 283 *pt-- = '0' + (char)digit; 284 else 285 *pt-- = 'a' + (char)(digit - 10); 286 if ((val = (val >> 4)) == (u_long)0) 287 break; 288 } 289 } else { 290 while (pt >= str) { 291 *pt-- = '0' + (char)(val & 0x7); 292 if ((val = (val >> 3)) == 0) 293 break; 294 } 295 } 296 297 /* 298 * pad with leading ascii ZEROS. We return -1 if we ran out of space. 299 */ 300 while (pt >= str) 301 *pt-- = '0'; 302 if (val != 0) 303 return -1; 304 return 0; 305 } 306 307 /* 308 * asc_umax() 309 * convert hex/octal character string into a uintmax. We do 310 * not have to to check for overflow! (the headers in all supported 311 * formats are not large enough to create an overflow). 312 * NOTE: strings passed to us are NOT TERMINATED. 313 * Return: 314 * uintmax_t value 315 */ 316 317 uintmax_t 318 asc_umax(char *str, int len, int base) 319 { 320 char *stop; 321 uintmax_t tval = 0; 322 323 stop = str + len; 324 325 /* 326 * skip over leading blanks and zeros 327 */ 328 while ((str < stop) && ((*str == ' ') || (*str == '0'))) 329 ++str; 330 331 /* 332 * for each valid digit, shift running value (tval) over to next digit 333 * and add next digit 334 */ 335 if (base == HEX) { 336 while (str < stop) { 337 if ((*str >= '0') && (*str <= '9')) 338 tval = (tval << 4) + (*str++ - '0'); 339 else if ((*str >= 'A') && (*str <= 'F')) 340 tval = (tval << 4) + 10 + (*str++ - 'A'); 341 else if ((*str >= 'a') && (*str <= 'f')) 342 tval = (tval << 4) + 10 + (*str++ - 'a'); 343 else 344 break; 345 } 346 } else { 347 while ((str < stop) && (*str >= '0') && (*str <= '7')) 348 tval = (tval << 3) + (*str++ - '0'); 349 } 350 return tval; 351 } 352 353 /* 354 * umax_asc() 355 * convert an uintmax_t into a hex/oct ascii string. pads with 356 * LEADING ascii 0's to fill string completely 357 * NOTE: the string created is NOT TERMINATED. 358 */ 359 360 int 361 umax_asc(uintmax_t val, char *str, int len, int base) 362 { 363 char *pt; 364 uintmax_t digit; 365 366 /* 367 * WARNING str is not '\0' terminated by this routine 368 */ 369 pt = str + len - 1; 370 371 /* 372 * do a tailwise conversion (start at right most end of string to place 373 * least significant digit). Keep shifting until conversion value goes 374 * to zero (all digits were converted) 375 */ 376 if (base == HEX) { 377 while (pt >= str) { 378 if ((digit = (val & 0xf)) < 10) 379 *pt-- = '0' + (char)digit; 380 else 381 *pt-- = 'a' + (char)(digit - 10); 382 if ((val = (val >> 4)) == 0) 383 break; 384 } 385 } else { 386 while (pt >= str) { 387 *pt-- = '0' + (char)(val & 0x7); 388 if ((val = (val >> 3)) == 0) 389 break; 390 } 391 } 392 393 /* 394 * pad with leading ascii ZEROS. We return -1 if we ran out of space. 395 */ 396 while (pt >= str) 397 *pt-- = '0'; 398 if (val != 0) 399 return -1; 400 return 0; 401 } 402 403 int 404 check_Aflag(void) 405 { 406 407 if (Aflag > 0) 408 return 1; 409 if (Aflag == 0) { 410 Aflag = -1; 411 tty_warn(0, 412 "Removing leading / from absolute path names in the archive"); 413 } 414 return 0; 415 } 416