bin/ls/print.c

   1 /*
   2  * Copyright (c) 1989, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Michael Fischbein.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 4. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * @(#)print.c  8.4 (Berkeley) 4/17/94
  33  * $FreeBSD: src/bin/ls/print.c,v 1.73 2004/06/08 09:27:42 das Exp $
  34  * $DragonFly: src/bin/ls/print.c,v 1.17 2005/11/06 12:44:02 swildner Exp $
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/stat.h>
  39
  40 #include <err.h>
  41 #include <errno.h>
  42 #include <fts.h>
  43 #include <langinfo.h>
  44 #include <libutil.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <time.h>
  49 #include <unistd.h>
  50 #ifdef COLORLS
  51 #include <ctype.h>
  52 #include <termcap.h>
  53 #include <signal.h>
  54 #endif
  55
  56 #include "ls.h"
  57 #include "extern.h"
  58
  59 static int      printaname(const FTSENT *, u_long, u_long);
  60 static void     printlink(const FTSENT *);
  61 static void     printtime(time_t);
  62 static int      printtype(u_int);
  63 static void     printsize(size_t, off_t);
  64 #ifdef COLORLS
  65 static void     endcolor(int);
  66 static int      colortype(mode_t);
  67 #endif
  68
  69 #define IS_NOPRINT(p)   ((p)->fts_number == NO_PRINT)
  70
  71 #ifdef COLORLS
  72 /* Most of these are taken from <sys/stat.h> */
  73 typedef enum Colors {
  74         C_DIR,                  /* directory */
  75         C_LNK,                  /* symbolic link */
  76         C_SOCK,                 /* socket */
  77         C_FIFO,                 /* pipe */
  78         C_EXEC,                 /* executable */
  79         C_BLK,                  /* block special */
  80         C_CHR,                  /* character special */
  81         C_SUID,                 /* setuid executable */
  82         C_SGID,                 /* setgid executable */
  83         C_WSDIR,                /* directory writeble to others, with sticky
  84                                  * bit */
  85         C_WDIR,                 /* directory writeble to others, without
  86                                  * sticky bit */
  87         C_NUMCOLORS             /* just a place-holder */
  88 } Colors;
  89
  90 static const char *defcolors = "exfxcxdxbxegedabagacad";
  91
  92 /* colors for file types */
  93 static struct {
  94         int     num[2];
  95         int     bold;
  96 } colors[C_NUMCOLORS];
  97 #endif
  98
  99 void
 100 printscol(const DISPLAY *dp)
 101 {
 102         FTSENT *p;
 103
 104         for (p = dp->list; p; p = p->fts_link) {
 105                 if (IS_NOPRINT(p))
 106                         continue;
 107                 printaname(p, dp->s_inode, dp->s_block);
 108                 putchar('\n');
 109         }
 110 }
 111
 112 /*
 113  * print name in current style
 114  */
 115 int
 116 printname(const char *name)
 117 {
 118         if (f_octal || f_octal_escape)
 119                 return prn_octal(name);
 120         else if (f_nonprint)
 121                 return prn_printable(name);
 122         else
 123                 return prn_normal(name);
 124 }
 125
 126 void
 127 printlong(const DISPLAY *dp)
 128 {
 129         struct stat *sp;
 130         FTSENT *p;
 131         NAMES *np;
 132         char buf[20];
 133 #ifdef COLORLS
 134         int color_printed = 0;
 135 #endif
 136
 137         if ((dp->list == NULL || dp->list->fts_level != FTS_ROOTLEVEL) &&
 138             (f_longform || f_size)) {
 139                 printf("total %lu\n", howmany(dp->btotal, blocksize));
 140         }
 141
 142         for (p = dp->list; p; p = p->fts_link) {
 143                 if (IS_NOPRINT(p))
 144                         continue;
 145                 sp = p->fts_statp;
 146                 if (f_inode)
 147                         printf("%*lu ", dp->s_inode, (u_long)sp->st_ino);
 148                 if (f_size)
 149                         printf("%*lld ",
 150                             dp->s_block, howmany(sp->st_blocks, blocksize));
 151                 strmode(sp->st_mode, buf);
 152                 np = p->fts_pointer;
 153                 printf("%s %*u %-*s  %-*s  ", buf, dp->s_nlink,
 154                     sp->st_nlink, dp->s_user, np->user, dp->s_group,
 155                     np->group);
 156                 if (f_fsmid)
 157                         printf("%s ", np->fsmid);
 158                 if (f_flags)
 159                         printf("%-*s ", dp->s_flags, np->flags);
 160                 if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode))
 161                         if (minor(sp->st_rdev) > 255 || minor(sp->st_rdev) < 0)
 162                                 printf("%3d, 0x%08x ",
 163                                     major(sp->st_rdev),
 164                                     (u_int)minor(sp->st_rdev));
 165                         else
 166                                 printf("%3d, %3d ",
 167                                     major(sp->st_rdev), minor(sp->st_rdev));
 168                 else if (dp->bcfile)
 169                         printf("%*s%*lld ",
 170                             8 - dp->s_size, "", dp->s_size, sp->st_size);
 171                 else
 172                         printsize(dp->s_size, sp->st_size);
 173                 if (f_accesstime)
 174                         printtime(sp->st_atime);
 175                 else if (f_statustime)
 176                         printtime(sp->st_ctime);
 177                 else
 178                         printtime(sp->st_mtime);
 179 #ifdef COLORLS
 180                 if (f_color)
 181                         color_printed = colortype(sp->st_mode);
 182 #endif
 183                 printname(p->fts_name);
 184 #ifdef COLORLS
 185                 if (f_color && color_printed)
 186                         endcolor(0);
 187 #endif
 188                 if (f_type)
 189                         printtype(sp->st_mode);
 190                 if (S_ISLNK(sp->st_mode))
 191                         printlink(p);
 192                 putchar('\n');
 193         }
 194 }
 195
 196 void
 197 printstream(const DISPLAY *dp)
 198 {
 199         FTSENT *p;
 200         int chcnt;
 201
 202         for (p = dp->list, chcnt = 0; p; p = p->fts_link) {
 203                 if (p->fts_number == NO_PRINT)
 204                         continue;
 205                 /* XXX strlen does not take octal escapes into account. */
 206                 if (strlen(p->fts_name) + chcnt +
 207                     (p->fts_link ? 2 : 0) >= (unsigned)termwidth) {
 208                         putchar('\n');
 209                         chcnt = 0;
 210                 }
 211                 chcnt += printaname(p, dp->s_inode, dp->s_block);
 212                 if (p->fts_link) {
 213                         printf(", ");
 214                         chcnt += 2;
 215                 }
 216         }
 217         if (chcnt)
 218                 putchar('\n');
 219 }
 220
 221 void
 222 printcol(const DISPLAY *dp)
 223 {
 224         static FTSENT **array;
 225         static int lastentries = -1;
 226         FTSENT *p;
 227         FTSENT **narray;
 228         int base;
 229         int chcnt;
 230         int cnt;
 231         int col;
 232         int colwidth;
 233         int endcol;
 234         int num;
 235         int numcols;
 236         int numrows;
 237         int row;
 238         int tabwidth;
 239
 240         if (f_notabs)
 241                 tabwidth = 1;
 242         else
 243                 tabwidth = 8;
 244
 245         /*
 246          * Have to do random access in the linked list -- build a table
 247          * of pointers.
 248          */
 249         if (dp->entries > lastentries) {
 250                 lastentries = dp->entries;
 251                 if ((narray =
 252                     realloc(array, dp->entries * sizeof(FTSENT *))) == NULL) {
 253                         warn(NULL);
 254                         printscol(dp);
 255                         return;
 256                 }
 257                 lastentries = dp->entries;
 258                 array = narray;
 259         }
 260         for (p = dp->list, num = 0; p; p = p->fts_link)
 261                 if (p->fts_number != NO_PRINT)
 262                         array[num++] = p;
 263
 264         colwidth = dp->maxlen;
 265         if (f_inode)
 266                 colwidth += dp->s_inode + 1;
 267         if (f_size)
 268                 colwidth += dp->s_block + 1;
 269         if (f_type)
 270                 colwidth += 1;
 271
 272         colwidth = (colwidth + tabwidth) & ~(tabwidth - 1);
 273         if (termwidth < 2 * colwidth) {
 274                 printscol(dp);
 275                 return;
 276         }
 277         numcols = termwidth / colwidth;
 278         numrows = num / numcols;
 279         if (num % numcols)
 280                 ++numrows;
 281
 282         if ((dp->list == NULL || dp->list->fts_level != FTS_ROOTLEVEL) &&
 283             (f_longform || f_size)) {
 284                 printf("total %lu\n", howmany(dp->btotal, blocksize));
 285         }
 286
 287         /* counter if f_sortacross, else case-by-case */
 288         base = 0;
 289
 290         for (row = 0; row < numrows; ++row) {
 291                 endcol = colwidth;
 292                 if (!f_sortacross)
 293                         base = row;
 294                 for (col = 0, chcnt = 0; col < numcols; ++col) {
 295                         chcnt += printaname(array[base], dp->s_inode,
 296                             dp->s_block);
 297                         if (f_sortacross)
 298                                 base++;
 299                         else
 300                                 base += numrows;
 301                         if (base >= num)
 302                                 break;
 303                         while ((cnt = ((chcnt + tabwidth) & ~(tabwidth - 1)))
 304                             <= endcol) {
 305                                 if (f_sortacross && col + 1 >= numcols)
 306                                         break;
 307                                 putchar(f_notabs ? ' ' : '\t');
 308                                 chcnt = cnt;
 309                         }
 310                         endcol += colwidth;
 311                 }
 312                 putchar('\n');
 313         }
 314 }
 315
 316 /*
 317  * print [inode] [size] name
 318  * return # of characters printed, no trailing characters.
 319  */
 320 static int
 321 printaname(const FTSENT *p, u_long inodefield, u_long sizefield)
 322 {
 323         struct stat *sp;
 324         int chcnt;
 325 #ifdef COLORLS
 326         int color_printed = 0;
 327 #endif
 328
 329         sp = p->fts_statp;
 330         chcnt = 0;
 331         if (f_inode)
 332                 chcnt += printf("%*lu ", (int)inodefield, (u_long)sp->st_ino);
 333         if (f_size)
 334                 chcnt += printf("%*lld ",
 335                     (int)sizefield, howmany(sp->st_blocks, blocksize));
 336 #ifdef COLORLS
 337         if (f_color)
 338                 color_printed = colortype(sp->st_mode);
 339 #endif
 340         chcnt += printname(p->fts_name);
 341 #ifdef COLORLS
 342         if (f_color && color_printed)
 343                 endcolor(0);
 344 #endif
 345         if (f_type)
 346                 chcnt += printtype(sp->st_mode);
 347         return (chcnt);
 348 }
 349
 350 static void
 351 printtime(time_t ftime)
 352 {
 353         char longstring[80];
 354         static time_t now;
 355         const char *format;
 356         static int d_first = -1;
 357
 358         if (d_first < 0)
 359                 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
 360         if (now == 0)
 361                 now = time(NULL);
 362
 363 #define SIXMONTHS       ((365 / 2) * 86400)
 364         if (f_sectime)
 365                 /* mmm dd hh:mm:ss yyyy || dd mmm hh:mm:ss yyyy */
 366                 format = d_first ? "%e %b %T %Y " : "%b %e %T %Y ";
 367         else if (ftime + SIXMONTHS > now && ftime < now + SIXMONTHS)
 368                 /* mmm dd hh:mm || dd mmm hh:mm */
 369                 format = d_first ? "%e %b %R " : "%b %e %R ";
 370         else
 371                 /* mmm dd  yyyy || dd mmm  yyyy */
 372                 format = d_first ? "%e %b  %Y " : "%b %e  %Y ";
 373         strftime(longstring, sizeof(longstring), format, localtime(&ftime));
 374         fputs(longstring, stdout);
 375 }
 376
 377 static int
 378 printtype(u_int mode)
 379 {
 380
 381         if (f_slash) {
 382                 if ((mode & S_IFMT) == S_IFDIR) {
 383                         putchar('/');
 384                         return (1);
 385                 }
 386                 return (0);
 387         }
 388
 389         switch (mode & S_IFMT) {
 390         case S_IFDIR:
 391                 putchar('/');
 392                 return (1);
 393         case S_IFIFO:
 394                 putchar('|');
 395                 return (1);
 396         case S_IFLNK:
 397                 putchar('@');
 398                 return (1);
 399         case S_IFSOCK:
 400                 putchar('=');
 401                 return (1);
 402         case S_IFWHT:
 403                 putchar('%');
 404                 return (1);
 405         default:
 406                 break;
 407         }
 408         if (mode & (S_IXUSR | S_IXGRP | S_IXOTH)) {
 409                 putchar('*');
 410                 return (1);
 411         }
 412         return (0);
 413 }
 414
 415 #ifdef COLORLS
 416 static int
 417 putch(int c)
 418 {
 419         putchar(c);
 420         return 0;
 421 }
 422
 423 static int
 424 writech(int c)
 425 {
 426         char tmp = (char)c;
 427
 428         write(STDOUT_FILENO, &tmp, 1);
 429         return 0;
 430 }
 431
 432 static void
 433 printcolor(Colors c)
 434 {
 435         char *ansiseq;
 436
 437         if (colors[c].bold)
 438                 tputs(enter_bold, 1, putch);
 439
 440         if (colors[c].num[0] != -1) {
 441                 ansiseq = tgoto(ansi_fgcol, 0, colors[c].num[0]);
 442                 if (ansiseq)
 443                         tputs(ansiseq, 1, putch);
 444         }
 445         if (colors[c].num[1] != -1) {
 446                 ansiseq = tgoto(ansi_bgcol, 0, colors[c].num[1]);
 447                 if (ansiseq)
 448                         tputs(ansiseq, 1, putch);
 449         }
 450 }
 451
 452 static void
 453 endcolor(int sig)
 454 {
 455         tputs(ansi_coloff, 1, sig ? writech : putch);
 456         tputs(attrs_off, 1, sig ? writech : putch);
 457 }
 458
 459 static int
 460 colortype(mode_t mode)
 461 {
 462         switch (mode & S_IFMT) {
 463         case S_IFDIR:
 464                 if (mode & S_IWOTH)
 465                         if (mode & S_ISTXT)
 466                                 printcolor(C_WSDIR);
 467                         else
 468                                 printcolor(C_WDIR);
 469                 else
 470                         printcolor(C_DIR);
 471                 return (1);
 472         case S_IFLNK:
 473                 printcolor(C_LNK);
 474                 return (1);
 475         case S_IFSOCK:
 476                 printcolor(C_SOCK);
 477                 return (1);
 478         case S_IFIFO:
 479                 printcolor(C_FIFO);
 480                 return (1);
 481         case S_IFBLK:
 482                 printcolor(C_BLK);
 483                 return (1);
 484         case S_IFCHR:
 485                 printcolor(C_CHR);
 486                 return (1);
 487         default:;
 488         }
 489         if (mode & (S_IXUSR | S_IXGRP | S_IXOTH)) {
 490                 if (mode & S_ISUID)
 491                         printcolor(C_SUID);
 492                 else if (mode & S_ISGID)
 493                         printcolor(C_SGID);
 494                 else
 495                         printcolor(C_EXEC);
 496                 return (1);
 497         }
 498         return (0);
 499 }
 500
 501 void
 502 parsecolors(const char *cs)
 503 {
 504         int i;
 505         int j;
 506         size_t len;
 507         char c[2];
 508         short legacy_warn = 0;
 509
 510         if (cs == NULL)
 511                 cs = "";        /* LSCOLORS not set */
 512         len = strlen(cs);
 513         for (i = 0; i < C_NUMCOLORS; i++) {
 514                 colors[i].bold = 0;
 515
 516                 if (len <= 2 * (size_t)i) {
 517                         c[0] = defcolors[2 * i];
 518                         c[1] = defcolors[2 * i + 1];
 519                 } else {
 520                         c[0] = cs[2 * i];
 521                         c[1] = cs[2 * i + 1];
 522                 }
 523                 for (j = 0; j < 2; j++) {
 524                         /* Legacy colours used 0-7 */
 525                         if (c[j] >= '0' && c[j] <= '7') {
 526                                 colors[i].num[j] = c[j] - '0';
 527                                 if (!legacy_warn) {
 528                                         warnx("LSCOLORS should use "
 529                                               "characters a-h instead of 0-9 ("
 530                                               "see the manual page)\n");
 531                                 }
 532                                 legacy_warn = 1;
 533                         } else if (c[j] >= 'a' && c[j] <= 'h')
 534                                 colors[i].num[j] = c[j] - 'a';
 535                         else if (c[j] >= 'A' && c[j] <= 'H') {
 536                                 colors[i].num[j] = c[j] - 'A';
 537                                 colors[i].bold = 1;
 538                         } else if (tolower((unsigned char)c[j] == 'x'))
 539                                 colors[i].num[j] = -1;
 540                         else {
 541                                 warnx("invalid character '%c' in LSCOLORS"
 542                                       " env var\n", c[j]);
 543                                 colors[i].num[j] = -1;
 544                         }
 545                 }
 546         }
 547 }
 548
 549 void
 550 colorquit(int sig)
 551 {
 552         endcolor(sig);
 553
 554         signal(sig, SIG_DFL);
 555         kill(getpid(), sig);
 556 }
 557
 558 #endif /* COLORLS */
 559
 560 static void
 561 printlink(const FTSENT *p)
 562 {
 563         int lnklen;
 564         char name[MAXPATHLEN + 1];
 565         char path[MAXPATHLEN + 1];
 566
 567         if (p->fts_level == FTS_ROOTLEVEL)
 568                 snprintf(name, sizeof(name), "%s", p->fts_name);
 569         else
 570                 snprintf(name, sizeof(name),
 571                     "%s/%s", p->fts_parent->fts_accpath, p->fts_name);
 572         if ((lnklen = readlink(name, path, sizeof(path) - 1)) == -1) {
 573                 fprintf(stderr, "\nls: %s: %s\n", name, strerror(errno));
 574                 return;
 575         }
 576         path[lnklen] = '\0';
 577         printf(" -> ");
 578         printname(path);
 579 }
 580
 581 static void
 582 printsize(size_t width, off_t bytes)
 583 {
 584         if (f_humanval) {
 585                 char buf[5];
 586
 587                 humanize_number(buf, sizeof(buf), (int64_t)bytes, "",
 588                                 HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
 589                 printf("%5s ", buf);
 590         } else
 591                 printf("%*lld ", width, bytes);
 592 }