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  * 3. 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  */
  35
  36 #include <sys/param.h>
  37 #include <sys/stat.h>
  38
  39 #include <err.h>
  40 #include <errno.h>
  41 #include <fts.h>
  42 #include <langinfo.h>
  43 #include <libutil.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <string.h>
  47 #include <time.h>
  48 #include <unistd.h>
  49 #include <locale.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("%*ju ", dp->s_inode, (uintmax_t)sp->st_ino);
 148                 if (f_size)
 149                         printf("%*jd ",
 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                         printf("%3d, 0x%08x ",
 162                                major(sp->st_rdev), (u_int)minor(sp->st_rdev));
 163                 else if (dp->bcfile)
 164                         printf("%*s%*jd ",
 165                             8 - dp->s_size, "", dp->s_size, (intmax_t)sp->st_size);
 166                 else
 167                         printsize(dp->s_size, sp->st_size);
 168                 if (f_accesstime)
 169                         printtime(sp->st_atime);
 170                 else if (f_statustime)
 171                         printtime(sp->st_ctime);
 172                 else
 173                         printtime(sp->st_mtime);
 174 #ifdef COLORLS
 175                 if (f_color)
 176                         color_printed = colortype(sp->st_mode);
 177 #endif
 178                 printname(p->fts_name);
 179 #ifdef COLORLS
 180                 if (f_color && color_printed)
 181                         endcolor(0);
 182 #endif
 183                 if (f_type)
 184                         printtype(sp->st_mode);
 185                 if (S_ISLNK(sp->st_mode))
 186                         printlink(p);
 187                 putchar('\n');
 188         }
 189 }
 190
 191 void
 192 printstream(const DISPLAY *dp)
 193 {
 194         FTSENT *p;
 195         int chcnt;
 196
 197         for (p = dp->list, chcnt = 0; p; p = p->fts_link) {
 198                 if (p->fts_number == NO_PRINT)
 199                         continue;
 200                 /* XXX strlen does not take octal escapes into account. */
 201                 if (strlen(p->fts_name) + chcnt +
 202                     (p->fts_link ? 2 : 0) >= (unsigned)termwidth) {
 203                         putchar('\n');
 204                         chcnt = 0;
 205                 }
 206                 chcnt += printaname(p, dp->s_inode, dp->s_block);
 207                 if (p->fts_link) {
 208                         printf(", ");
 209                         chcnt += 2;
 210                 }
 211         }
 212         if (chcnt)
 213                 putchar('\n');
 214 }
 215
 216 void
 217 printcol(const DISPLAY *dp)
 218 {
 219         static FTSENT **array;
 220         static int lastentries = -1;
 221         FTSENT *p;
 222         FTSENT **narray;
 223         int base;
 224         int chcnt;
 225         int cnt;
 226         int col;
 227         int colwidth;
 228         int endcol;
 229         int num;
 230         int numcols;
 231         int numrows;
 232         int row;
 233         int tabwidth;
 234
 235         if (f_notabs)
 236                 tabwidth = 1;
 237         else
 238                 tabwidth = 8;
 239
 240         /*
 241          * Have to do random access in the linked list -- build a table
 242          * of pointers.
 243          */
 244         if (dp->entries > lastentries) {
 245                 lastentries = dp->entries;
 246                 if ((narray =
 247                     realloc(array, dp->entries * sizeof(FTSENT *))) == NULL) {
 248                         warn(NULL);
 249                         printscol(dp);
 250                         return;
 251                 }
 252                 lastentries = dp->entries;
 253                 array = narray;
 254         }
 255         for (p = dp->list, num = 0; p; p = p->fts_link)
 256                 if (p->fts_number != NO_PRINT)
 257                         array[num++] = p;
 258
 259         colwidth = dp->maxlen;
 260         if (f_inode)
 261                 colwidth += dp->s_inode + 1;
 262         if (f_size)
 263                 colwidth += dp->s_block + 1;
 264         if (f_type)
 265                 colwidth += 1;
 266
 267         colwidth = (colwidth + tabwidth) & ~(tabwidth - 1);
 268         if (termwidth < 2 * colwidth) {
 269                 printscol(dp);
 270                 return;
 271         }
 272         numcols = termwidth / colwidth;
 273         numrows = num / numcols;
 274         if (num % numcols)
 275                 ++numrows;
 276
 277         if ((dp->list == NULL || dp->list->fts_level != FTS_ROOTLEVEL) &&
 278             (f_longform || f_size)) {
 279                 printf("total %lu\n", howmany(dp->btotal, blocksize));
 280         }
 281
 282         /* counter if f_sortacross, else case-by-case */
 283         base = 0;
 284
 285         for (row = 0; row < numrows; ++row) {
 286                 endcol = colwidth;
 287                 if (!f_sortacross)
 288                         base = row;
 289                 for (col = 0, chcnt = 0; col < numcols; ++col) {
 290                         chcnt += printaname(array[base], dp->s_inode,
 291                             dp->s_block);
 292                         if (f_sortacross)
 293                                 base++;
 294                         else
 295                                 base += numrows;
 296                         if (base >= num)
 297                                 break;
 298                         while ((cnt = ((chcnt + tabwidth) & ~(tabwidth - 1)))
 299                             <= endcol) {
 300                                 if (f_sortacross && col + 1 >= numcols)
 301                                         break;
 302                                 putchar(f_notabs ? ' ' : '\t');
 303                                 chcnt = cnt;
 304                         }
 305                         endcol += colwidth;
 306                 }
 307                 putchar('\n');
 308         }
 309 }
 310
 311 /*
 312  * print [inode] [size] name
 313  * return # of characters printed, no trailing characters.
 314  */
 315 static int
 316 printaname(const FTSENT *p, u_long inodefield, u_long sizefield)
 317 {
 318         struct stat *sp;
 319         int chcnt;
 320 #ifdef COLORLS
 321         int color_printed = 0;
 322 #endif
 323
 324         sp = p->fts_statp;
 325         chcnt = 0;
 326         if (f_inode) {
 327                 chcnt += printf("%*ju ", (int)inodefield,
 328                                 (uintmax_t)sp->st_ino);
 329         }
 330         if (f_size)
 331                 chcnt += printf("%*jd ",
 332                     (int)sizefield, howmany(sp->st_blocks, blocksize));
 333 #ifdef COLORLS
 334         if (f_color)
 335                 color_printed = colortype(sp->st_mode);
 336 #endif
 337         chcnt += printname(p->fts_name);
 338 #ifdef COLORLS
 339         if (f_color && color_printed)
 340                 endcolor(0);
 341 #endif
 342         if (f_type)
 343                 chcnt += printtype(sp->st_mode);
 344         return (chcnt);
 345 }
 346
 347 static void
 348 printtime(time_t ftime)
 349 {
 350         char longstring[80];
 351         static time_t now;
 352         const char *format;
 353         static char *lc_time;
 354         static int posix_time;
 355
 356 #define SIXMONTHS       ((365 / 2) * 86400)
 357
 358         if (now == 0)
 359                 now = time(NULL);
 360
 361         if (lc_time == NULL) {
 362                 lc_time = setlocale(LC_TIME, NULL);
 363                 posix_time = (strcmp(lc_time, "C") == 0);
 364         }
 365
 366         if (f_sectime) {
 367                 /*
 368                  * POSIX: Not covered by standard.  If C/POSIX locale used
 369                  *        the old convention of mmm dd hh:mm:ss yyyy is kept.
 370                  * Named locales use the extended ISO 8601 format without T:
 371                  *        YYYY-DD-MM hh:mm:ss
 372                  */
 373                 format = posix_time ? "%b %e %T %Y " : "%F %T ";
 374         } else if (posix_time) {
 375                 /*
 376                  * POSIX: Future or older than 6 months returns equivalent of
 377                  *        date "+%b %e  %Y"
 378                  *        If file was modified within the past 6 months,
 379                  *        return equivalent of: date "+%b %e %H:%M"
 380                  */
 381                 if ((ftime > now) || (ftime < now - SIXMONTHS))
 382                         format = "%b %e  %Y ";
 383                 else
 384                         format = "%b %e %R ";
 385         } else {
 386                 /*
 387                  * Named locales use format DD-MMM-YYYY hh:mm
 388                  * Regardless of locale, English is used for month field
 389                  */
 390                 format = "%d-%b-%Y %H:%M ";
 391         }
 392
 393         strftime_l(longstring, sizeof(longstring), format, localtime(&ftime),
 394             NULL);
 395         fputs(longstring, stdout);
 396 }
 397
 398 static int
 399 printtype(u_int mode)
 400 {
 401
 402         if (f_slash) {
 403                 if ((mode & S_IFMT) == S_IFDIR) {
 404                         putchar('/');
 405                         return (1);
 406                 }
 407                 return (0);
 408         }
 409
 410         switch (mode & S_IFMT) {
 411         case S_IFDIR:
 412                 putchar('/');
 413                 return (1);
 414         case S_IFIFO:
 415                 putchar('|');
 416                 return (1);
 417         case S_IFLNK:
 418                 putchar('@');
 419                 return (1);
 420         case S_IFSOCK:
 421                 putchar('=');
 422                 return (1);
 423         case S_IFWHT:
 424                 putchar('%');
 425                 return (1);
 426         default:
 427                 break;
 428         }
 429         if (mode & (S_IXUSR | S_IXGRP | S_IXOTH)) {
 430                 putchar('*');
 431                 return (1);
 432         }
 433         return (0);
 434 }
 435
 436 #ifdef COLORLS
 437 static int
 438 putch(int c)
 439 {
 440         putchar(c);
 441         return 0;
 442 }
 443
 444 static int
 445 writech(int c)
 446 {
 447         char tmp = (char)c;
 448
 449         write(STDOUT_FILENO, &tmp, 1);
 450         return 0;
 451 }
 452
 453 static void
 454 printcolor(Colors c)
 455 {
 456         char *ansiseq;
 457
 458         if (colors[c].bold)
 459                 tputs(enter_bold, 1, putch);
 460
 461         if (colors[c].num[0] != -1) {
 462                 ansiseq = tgoto(ansi_fgcol, 0, colors[c].num[0]);
 463                 if (ansiseq)
 464                         tputs(ansiseq, 1, putch);
 465         }
 466         if (colors[c].num[1] != -1) {
 467                 ansiseq = tgoto(ansi_bgcol, 0, colors[c].num[1]);
 468                 if (ansiseq)
 469                         tputs(ansiseq, 1, putch);
 470         }
 471 }
 472
 473 static void
 474 endcolor(int sig)
 475 {
 476         tputs(ansi_coloff, 1, sig ? writech : putch);
 477         tputs(attrs_off, 1, sig ? writech : putch);
 478 }
 479
 480 static int
 481 colortype(mode_t mode)
 482 {
 483         switch (mode & S_IFMT) {
 484         case S_IFDIR:
 485                 if (mode & S_IWOTH)
 486                         if (mode & S_ISTXT)
 487                                 printcolor(C_WSDIR);
 488                         else
 489                                 printcolor(C_WDIR);
 490                 else
 491                         printcolor(C_DIR);
 492                 return (1);
 493         case S_IFLNK:
 494                 printcolor(C_LNK);
 495                 return (1);
 496         case S_IFSOCK:
 497                 printcolor(C_SOCK);
 498                 return (1);
 499         case S_IFIFO:
 500                 printcolor(C_FIFO);
 501                 return (1);
 502         case S_IFBLK:
 503                 printcolor(C_BLK);
 504                 return (1);
 505         case S_IFCHR:
 506                 printcolor(C_CHR);
 507                 return (1);
 508         default:;
 509         }
 510         if (mode & (S_IXUSR | S_IXGRP | S_IXOTH)) {
 511                 if (mode & S_ISUID)
 512                         printcolor(C_SUID);
 513                 else if (mode & S_ISGID)
 514                         printcolor(C_SGID);
 515                 else
 516                         printcolor(C_EXEC);
 517                 return (1);
 518         }
 519         return (0);
 520 }
 521
 522 void
 523 parsecolors(const char *cs)
 524 {
 525         int i;
 526         int j;
 527         size_t len;
 528         char c[2];
 529         short legacy_warn = 0;
 530
 531         if (cs == NULL)
 532                 cs = "";        /* LSCOLORS not set */
 533         len = strlen(cs);
 534         for (i = 0; i < C_NUMCOLORS; i++) {
 535                 colors[i].bold = 0;
 536
 537                 if (len <= 2 * (size_t)i) {
 538                         c[0] = defcolors[2 * i];
 539                         c[1] = defcolors[2 * i + 1];
 540                 } else {
 541                         c[0] = cs[2 * i];
 542                         c[1] = cs[2 * i + 1];
 543                 }
 544                 for (j = 0; j < 2; j++) {
 545                         /* Legacy colours used 0-7 */
 546                         if (c[j] >= '0' && c[j] <= '7') {
 547                                 colors[i].num[j] = c[j] - '0';
 548                                 if (!legacy_warn) {
 549                                         warnx("LSCOLORS should use "
 550                                               "characters a-h instead of 0-9 ("
 551                                               "see the manual page)\n");
 552                                 }
 553                                 legacy_warn = 1;
 554                         } else if (c[j] >= 'a' && c[j] <= 'h')
 555                                 colors[i].num[j] = c[j] - 'a';
 556                         else if (c[j] >= 'A' && c[j] <= 'H') {
 557                                 colors[i].num[j] = c[j] - 'A';
 558                                 colors[i].bold = 1;
 559                         } else if (tolower((unsigned char)c[j] == 'x'))
 560                                 colors[i].num[j] = -1;
 561                         else {
 562                                 warnx("invalid character '%c' in LSCOLORS"
 563                                       " env var\n", c[j]);
 564                                 colors[i].num[j] = -1;
 565                         }
 566                 }
 567         }
 568 }
 569
 570 void
 571 colorquit(int sig)
 572 {
 573         endcolor(sig);
 574
 575         signal(sig, SIG_DFL);
 576         kill(getpid(), sig);
 577 }
 578
 579 #endif /* COLORLS */
 580
 581 static void
 582 printlink(const FTSENT *p)
 583 {
 584         int lnklen;
 585         char name[MAXPATHLEN + 1];
 586         char path[MAXPATHLEN + 1];
 587
 588         if (p->fts_level == FTS_ROOTLEVEL)
 589                 snprintf(name, sizeof(name), "%s", p->fts_name);
 590         else
 591                 snprintf(name, sizeof(name),
 592                     "%s/%s", p->fts_parent->fts_accpath, p->fts_name);
 593         if ((lnklen = readlink(name, path, sizeof(path) - 1)) == -1) {
 594                 fprintf(stderr, "\nls: %s: %s\n", name, strerror(errno));
 595                 return;
 596         }
 597         path[lnklen] = '\0';
 598         printf(" -> ");
 599         printname(path);
 600 }
 601
 602 static void
 603 printsize(size_t width, off_t bytes)
 604 {
 605         if (f_humanval) {
 606                 char buf[5];
 607
 608                 humanize_number(buf, sizeof(buf), (int64_t)bytes, "",
 609                                 HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
 610                 printf("%5s ", buf);
 611         } else
 612                 printf("%*jd ", (int)width, (uintmax_t)bytes);
 613 }