bin/ls/print.c

   1 /*      $NetBSD: print.c,v 1.55 2014/05/10 09:39:18 martin Exp $        */
   2
   3 /*
   4  * Copyright (c) 1989, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * Michael Fischbein.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #ifndef lint
  37 #if 0
  38 static char sccsid[] = "@(#)print.c     8.5 (Berkeley) 7/28/94";
  39 #else
  40 __RCSID("$NetBSD: print.c,v 1.55 2014/05/10 09:39:18 martin Exp $");
  41 #endif
  42 #endif /* not lint */
  43
  44 #include <sys/param.h>
  45 #include <sys/stat.h>
  46
  47 #include <err.h>
  48 #include <errno.h>
  49 #include <inttypes.h>
  50 #include <fts.h>
  51 #include <grp.h>
  52 #include <pwd.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <time.h>
  57 #include <tzfile.h>
  58 #include <unistd.h>
  59 #include <util.h>
  60
  61 #include "ls.h"
  62 #include "extern.h"
  63
  64 extern int termwidth;
  65
  66 static int      printaname(FTSENT *, int, int);
  67 static void     printlink(FTSENT *);
  68 static void     printtime(time_t);
  69 static void     printtotal(DISPLAY *dp);
  70 static int      printtype(u_int);
  71
  72 static time_t   now;
  73
  74 #define IS_NOPRINT(p)   ((p)->fts_number == NO_PRINT)
  75
  76 static int
  77 safe_printpath(const FTSENT *p) {
  78         int chcnt;
  79
  80         if (f_fullpath) {
  81                 chcnt = safe_print(p->fts_path);
  82                 chcnt += safe_print("/");
  83         } else
  84                 chcnt = 0;
  85         return chcnt + safe_print(p->fts_name);
  86 }
  87
  88 static int
  89 printescapedpath(const FTSENT *p) {
  90         int chcnt;
  91
  92         if (f_fullpath) {
  93                 chcnt = printescaped(p->fts_path);
  94                 chcnt += printescaped("/");
  95         } else
  96                 chcnt = 0;
  97
  98         return chcnt + printescaped(p->fts_name);
  99 }
 100
 101 static int
 102 printpath(const FTSENT *p) {
 103         if (f_fullpath)
 104                 return printf("%s/%s", p->fts_path, p->fts_name);
 105         else
 106                 return printf("%s", p->fts_name);
 107 }
 108
 109 void
 110 printscol(DISPLAY *dp)
 111 {
 112         FTSENT *p;
 113
 114         for (p = dp->list; p; p = p->fts_link) {
 115                 if (IS_NOPRINT(p))
 116                         continue;
 117                 (void)printaname(p, dp->s_inode, dp->s_block);
 118                 (void)putchar('\n');
 119         }
 120 }
 121
 122 void
 123 printlong(DISPLAY *dp)
 124 {
 125         struct stat *sp;
 126         FTSENT *p;
 127         NAMES *np;
 128         char buf[20], szbuf[5];
 129
 130         now = time(NULL);
 131
 132         if (!f_leafonly)
 133                 printtotal(dp);         /* "total: %u\n" */
 134
 135         for (p = dp->list; p; p = p->fts_link) {
 136                 if (IS_NOPRINT(p))
 137                         continue;
 138                 sp = p->fts_statp;
 139                 if (f_inode)
 140                         (void)printf("%*"PRIu64" ", dp->s_inode, sp->st_ino);
 141                 if (f_size) {
 142                         if (f_humanize) {
 143                                 if ((humanize_number(szbuf, sizeof(szbuf),
 144                                     sp->st_blocks * S_BLKSIZE,
 145                                     "", HN_AUTOSCALE,
 146                                     (HN_DECIMAL | HN_B | HN_NOSPACE))) == -1)
 147                                         err(1, "humanize_number");
 148                                 (void)printf("%*s ", dp->s_block, szbuf);
 149                         } else {
 150                                 (void)printf(f_commas ? "%'*llu " : "%*llu ",
 151                                     dp->s_block,
 152                                     (unsigned long long)howmany(sp->st_blocks,
 153                                     blocksize));
 154                         }
 155                 }
 156                 (void)strmode(sp->st_mode, buf);
 157                 np = p->fts_pointer;
 158                 (void)printf("%s %*lu ", buf, dp->s_nlink,
 159                     (unsigned long)sp->st_nlink);
 160                 if (!f_grouponly)
 161                         (void)printf("%-*s  ", dp->s_user, np->user);
 162                 (void)printf("%-*s  ", dp->s_group, np->group);
 163                 if (f_flags)
 164                         (void)printf("%-*s ", dp->s_flags, np->flags);
 165                 if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode))
 166                         (void)printf("%*lld, %*lld ",
 167                             dp->s_major, (long long)major(sp->st_rdev),
 168                             dp->s_minor, (long long)minor(sp->st_rdev));
 169                 else
 170                         if (f_humanize) {
 171                                 if ((humanize_number(szbuf, sizeof(szbuf),
 172                                     sp->st_size, "", HN_AUTOSCALE,
 173                                     (HN_DECIMAL | HN_B | HN_NOSPACE))) == -1)
 174                                         err(1, "humanize_number");
 175                                 (void)printf("%*s ", dp->s_size, szbuf);
 176                         } else {
 177                                 (void)printf(f_commas ? "%'*llu " : "%*llu ",
 178                                     dp->s_size, (unsigned long long)
 179                                     sp->st_size);
 180                         }
 181                 if (f_accesstime)
 182                         printtime(sp->st_atime);
 183                 else if (f_statustime)
 184                         printtime(sp->st_ctime);
 185                 else
 186                         printtime(sp->st_mtime);
 187                 if (f_octal || f_octal_escape)
 188                         (void)safe_printpath(p);
 189                 else if (f_nonprint)
 190                         (void)printescapedpath(p);
 191                 else
 192                         (void)printpath(p);
 193
 194                 if (f_type || (f_typedir && S_ISDIR(sp->st_mode)))
 195                         (void)printtype(sp->st_mode);
 196                 if (S_ISLNK(sp->st_mode))
 197                         printlink(p);
 198                 (void)putchar('\n');
 199         }
 200 }
 201
 202 void
 203 printcol(DISPLAY *dp)
 204 {
 205         static FTSENT **array;
 206         static int lastentries = -1;
 207         FTSENT *p;
 208         int base, chcnt, col, colwidth, num;
 209         int numcols, numrows, row;
 210
 211         colwidth = dp->maxlen;
 212         if (f_inode)
 213                 colwidth += dp->s_inode + 1;
 214         if (f_size) {
 215                 if (f_humanize)
 216                         colwidth += dp->s_size + 1;
 217                 else
 218                         colwidth += dp->s_block + 1;
 219         }
 220         if (f_type || f_typedir)
 221                 colwidth += 1;
 222
 223         colwidth += 1;
 224
 225         if (termwidth < 2 * colwidth) {
 226                 printscol(dp);
 227                 return;
 228         }
 229
 230         /*
 231          * Have to do random access in the linked list -- build a table
 232          * of pointers.
 233          */
 234         if (dp->entries > lastentries) {
 235                 FTSENT **newarray;
 236
 237                 newarray = realloc(array, dp->entries * sizeof(FTSENT *));
 238                 if (newarray == NULL) {
 239                         warn(NULL);
 240                         printscol(dp);
 241                         return;
 242                 }
 243                 lastentries = dp->entries;
 244                 array = newarray;
 245         }
 246         for (p = dp->list, num = 0; p; p = p->fts_link)
 247                 if (p->fts_number != NO_PRINT)
 248                         array[num++] = p;
 249
 250         numcols = termwidth / colwidth;
 251         colwidth = termwidth / numcols;         /* spread out if possible */
 252         numrows = num / numcols;
 253         if (num % numcols)
 254                 ++numrows;
 255
 256         printtotal(dp);                         /* "total: %u\n" */
 257
 258         for (row = 0; row < numrows; ++row) {
 259                 for (base = row, chcnt = col = 0; col < numcols; ++col) {
 260                         chcnt = printaname(array[base], dp->s_inode,
 261                             f_humanize ? dp->s_size : dp->s_block);
 262                         if ((base += numrows) >= num)
 263                                 break;
 264                         while (chcnt++ < colwidth)
 265                                 (void)putchar(' ');
 266                 }
 267                 (void)putchar('\n');
 268         }
 269 }
 270
 271 void
 272 printacol(DISPLAY *dp)
 273 {
 274         FTSENT *p;
 275         int chcnt, col, colwidth;
 276         int numcols;
 277
 278         colwidth = dp->maxlen;
 279         if (f_inode)
 280                 colwidth += dp->s_inode + 1;
 281         if (f_size) {
 282                 if (f_humanize)
 283                         colwidth += dp->s_size + 1;
 284                 else
 285                         colwidth += dp->s_block + 1;
 286         }
 287         if (f_type || f_typedir)
 288                 colwidth += 1;
 289
 290         colwidth += 1;
 291
 292         if (termwidth < 2 * colwidth) {
 293                 printscol(dp);
 294                 return;
 295         }
 296
 297         numcols = termwidth / colwidth;
 298         colwidth = termwidth / numcols;         /* spread out if possible */
 299
 300         printtotal(dp);                         /* "total: %u\n" */
 301
 302         chcnt = col = 0;
 303         for (p = dp->list; p; p = p->fts_link) {
 304                 if (IS_NOPRINT(p))
 305                         continue;
 306                 if (col >= numcols) {
 307                         chcnt = col = 0;
 308                         (void)putchar('\n');
 309                 }
 310                 chcnt = printaname(p, dp->s_inode,
 311                     f_humanize ? dp->s_size : dp->s_block);
 312                 while (chcnt++ < colwidth)
 313                         (void)putchar(' ');
 314                 col++;
 315         }
 316         (void)putchar('\n');
 317 }
 318
 319 void
 320 printstream(DISPLAY *dp)
 321 {
 322         FTSENT *p;
 323         int col;
 324         int extwidth;
 325
 326         extwidth = 0;
 327         if (f_inode)
 328                 extwidth += dp->s_inode + 1;
 329         if (f_size) {
 330                 if (f_humanize)
 331                         extwidth += dp->s_size + 1;
 332                 else
 333                         extwidth += dp->s_block + 1;
 334         }
 335         if (f_type)
 336                 extwidth += 1;
 337
 338         for (col = 0, p = dp->list; p != NULL; p = p->fts_link) {
 339                 if (IS_NOPRINT(p))
 340                         continue;
 341                 if (col > 0) {
 342                         (void)putchar(','), col++;
 343                         if (col + 1 + extwidth + (int)p->fts_namelen >= termwidth)
 344                                 (void)putchar('\n'), col = 0;
 345                         else
 346                                 (void)putchar(' '), col++;
 347                 }
 348                 col += printaname(p, dp->s_inode,
 349                     f_humanize ? dp->s_size : dp->s_block);
 350         }
 351         (void)putchar('\n');
 352 }
 353
 354 /*
 355  * print [inode] [size] name
 356  * return # of characters printed, no trailing characters.
 357  */
 358 static int
 359 printaname(FTSENT *p, int inodefield, int sizefield)
 360 {
 361         struct stat *sp;
 362         int chcnt;
 363         char szbuf[5];
 364
 365         sp = p->fts_statp;
 366         chcnt = 0;
 367         if (f_inode)
 368                 chcnt += printf("%*"PRIu64" ", inodefield, sp->st_ino);
 369         if (f_size) {
 370                 if (f_humanize) {
 371                         if ((humanize_number(szbuf, sizeof(szbuf), sp->st_size,
 372                             "", HN_AUTOSCALE,
 373                             (HN_DECIMAL | HN_B | HN_NOSPACE))) == -1)
 374                                 err(1, "humanize_number");
 375                         chcnt += printf("%*s ", sizefield, szbuf);
 376                 } else {
 377                         chcnt += printf(f_commas ? "%'*llu " : "%*llu ",
 378                             sizefield, (unsigned long long)
 379                             howmany(sp->st_blocks, blocksize));
 380                 }
 381         }
 382         if (f_octal || f_octal_escape)
 383                 chcnt += safe_printpath(p);
 384         else if (f_nonprint)
 385                 chcnt += printescapedpath(p);
 386         else
 387                 chcnt += printpath(p);
 388         if (f_type || (f_typedir && S_ISDIR(sp->st_mode)))
 389                 chcnt += printtype(sp->st_mode);
 390         return (chcnt);
 391 }
 392
 393 static void
 394 printtime(time_t ftime)
 395 {
 396         int i;
 397         const char *longstring;
 398
 399         if ((longstring = ctime(&ftime)) == NULL) {
 400                            /* 012345678901234567890123 */
 401                 longstring = "????????????????????????";
 402         }
 403         for (i = 4; i < 11; ++i)
 404                 (void)putchar(longstring[i]);
 405
 406 #define SIXMONTHS       ((DAYSPERNYEAR / 2) * SECSPERDAY)
 407         if (f_sectime)
 408                 for (i = 11; i < 24; i++)
 409                         (void)putchar(longstring[i]);
 410         else if (ftime + SIXMONTHS > now && ftime - SIXMONTHS < now)
 411                 for (i = 11; i < 16; ++i)
 412                         (void)putchar(longstring[i]);
 413         else {
 414                 (void)putchar(' ');
 415                 for (i = 20; i < 24; ++i)
 416                         (void)putchar(longstring[i]);
 417         }
 418         (void)putchar(' ');
 419 }
 420
 421 /*
 422  * Display total used disk space in the form "total: %u\n".
 423  * Note: POSIX (IEEE Std 1003.1-2001) says this should be always in 512 blocks,
 424  * but we humanise it with -h, or separate it with commas with -M, and use 1024
 425  * with -k.
 426  */
 427 static void
 428 printtotal(DISPLAY *dp)
 429 {
 430         char szbuf[5];
 431
 432         if (dp->list->fts_level != FTS_ROOTLEVEL && (f_longform || f_size)) {
 433                 if (f_humanize) {
 434                         if ((humanize_number(szbuf, sizeof(szbuf), (int64_t)dp->stotal,
 435                             "", HN_AUTOSCALE,
 436                             (HN_DECIMAL | HN_B | HN_NOSPACE))) == -1)
 437                                 err(1, "humanize_number");
 438                         (void)printf("total %s\n", szbuf);
 439                 } else {
 440                         (void)printf(f_commas ? "total %'llu\n" :
 441                             "total %llu\n", (unsigned long long)
 442                             howmany(dp->btotal, blocksize));
 443                 }
 444         }
 445 }
 446
 447 static int
 448 printtype(u_int mode)
 449 {
 450         switch (mode & S_IFMT) {
 451         case S_IFDIR:
 452                 (void)putchar('/');
 453                 return (1);
 454         case S_IFIFO:
 455                 (void)putchar('|');
 456                 return (1);
 457         case S_IFLNK:
 458                 (void)putchar('@');
 459                 return (1);
 460         case S_IFSOCK:
 461                 (void)putchar('=');
 462                 return (1);
 463         case S_IFWHT:
 464                 (void)putchar('%');
 465                 return (1);
 466         }
 467         if (mode & (S_IXUSR | S_IXGRP | S_IXOTH)) {
 468                 (void)putchar('*');
 469                 return (1);
 470         }
 471         return (0);
 472 }
 473
 474 static void
 475 printlink(FTSENT *p)
 476 {
 477         int lnklen;
 478         char name[MAXPATHLEN + 1], path[MAXPATHLEN + 1];
 479
 480         if (p->fts_level == FTS_ROOTLEVEL)
 481                 (void)snprintf(name, sizeof(name), "%s", p->fts_name);
 482         else
 483                 (void)snprintf(name, sizeof(name),
 484                     "%s/%s", p->fts_parent->fts_accpath, p->fts_name);
 485         if ((lnklen = readlink(name, path, sizeof(path) - 1)) == -1) {
 486                 (void)fprintf(stderr, "\nls: %s: %s\n", name, strerror(errno));
 487                 return;
 488         }
 489         path[lnklen] = '\0';
 490         (void)printf(" -> ");
 491         if (f_octal || f_octal_escape)
 492                 (void)safe_print(path);
 493         else if (f_nonprint)
 494                 (void)printescaped(path);
 495         else
 496                 (void)printf("%s", path);
 497 }