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 1.19 2008/05/04 02:28:28 dillon 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("%*llu ", dp->s_inode, (unsigned long 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                         printf("%3d, 0x%08x ",
 162                                major(sp->st_rdev), (u_int)minor(sp->st_rdev));
 163                 else if (dp->bcfile)
 164                         printf("%*s%*lld ",
 165                             8 - dp->s_size, "", dp->s_size, 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("%*lu ", (int)inodefield, (u_long)sp->st_ino);
 328         if (f_size)
 329                 chcnt += printf("%*lld ",
 330                     (int)sizefield, howmany(sp->st_blocks, blocksize));
 331 #ifdef COLORLS
 332         if (f_color)
 333                 color_printed = colortype(sp->st_mode);
 334 #endif
 335         chcnt += printname(p->fts_name);
 336 #ifdef COLORLS
 337         if (f_color && color_printed)
 338                 endcolor(0);
 339 #endif
 340         if (f_type)
 341                 chcnt += printtype(sp->st_mode);
 342         return (chcnt);
 343 }
 344
 345 static void
 346 printtime(time_t ftime)
 347 {
 348         char longstring[80];
 349         static time_t now;
 350         const char *format;
 351         static int d_first = -1;
 352
 353         if (d_first < 0)
 354                 d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
 355         if (now == 0)
 356                 now = time(NULL);
 357
 358 #define SIXMONTHS       ((365 / 2) * 86400)
 359         if (f_sectime)
 360                 /* mmm dd hh:mm:ss yyyy || dd mmm hh:mm:ss yyyy */
 361                 format = d_first ? "%e %b %T %Y " : "%b %e %T %Y ";
 362         else if (ftime + SIXMONTHS > now && ftime < now + SIXMONTHS)
 363                 /* mmm dd hh:mm || dd mmm hh:mm */
 364                 format = d_first ? "%e %b %R " : "%b %e %R ";
 365         else
 366                 /* mmm dd  yyyy || dd mmm  yyyy */
 367                 format = d_first ? "%e %b  %Y " : "%b %e  %Y ";
 368         strftime(longstring, sizeof(longstring), format, localtime(&ftime));
 369         fputs(longstring, stdout);
 370 }
 371
 372 static int
 373 printtype(u_int mode)
 374 {
 375
 376         if (f_slash) {
 377                 if ((mode & S_IFMT) == S_IFDIR) {
 378                         putchar('/');
 379                         return (1);
 380                 }
 381                 return (0);
 382         }
 383
 384         switch (mode & S_IFMT) {
 385         case S_IFDIR:
 386                 putchar('/');
 387                 return (1);
 388         case S_IFIFO:
 389                 putchar('|');
 390                 return (1);
 391         case S_IFLNK:
 392                 putchar('@');
 393                 return (1);
 394         case S_IFSOCK:
 395                 putchar('=');
 396                 return (1);
 397         case S_IFWHT:
 398                 putchar('%');
 399                 return (1);
 400         default:
 401                 break;
 402         }
 403         if (mode & (S_IXUSR | S_IXGRP | S_IXOTH)) {
 404                 putchar('*');
 405                 return (1);
 406         }
 407         return (0);
 408 }
 409
 410 #ifdef COLORLS
 411 static int
 412 putch(int c)
 413 {
 414         putchar(c);
 415         return 0;
 416 }
 417
 418 static int
 419 writech(int c)
 420 {
 421         char tmp = (char)c;
 422
 423         write(STDOUT_FILENO, &tmp, 1);
 424         return 0;
 425 }
 426
 427 static void
 428 printcolor(Colors c)
 429 {
 430         char *ansiseq;
 431
 432         if (colors[c].bold)
 433                 tputs(enter_bold, 1, putch);
 434
 435         if (colors[c].num[0] != -1) {
 436                 ansiseq = tgoto(ansi_fgcol, 0, colors[c].num[0]);
 437                 if (ansiseq)
 438                         tputs(ansiseq, 1, putch);
 439         }
 440         if (colors[c].num[1] != -1) {
 441                 ansiseq = tgoto(ansi_bgcol, 0, colors[c].num[1]);
 442                 if (ansiseq)
 443                         tputs(ansiseq, 1, putch);
 444         }
 445 }
 446
 447 static void
 448 endcolor(int sig)
 449 {
 450         tputs(ansi_coloff, 1, sig ? writech : putch);
 451         tputs(attrs_off, 1, sig ? writech : putch);
 452 }
 453
 454 static int
 455 colortype(mode_t mode)
 456 {
 457         switch (mode & S_IFMT) {
 458         case S_IFDIR:
 459                 if (mode & S_IWOTH)
 460                         if (mode & S_ISTXT)
 461                                 printcolor(C_WSDIR);
 462                         else
 463                                 printcolor(C_WDIR);
 464                 else
 465                         printcolor(C_DIR);
 466                 return (1);
 467         case S_IFLNK:
 468                 printcolor(C_LNK);
 469                 return (1);
 470         case S_IFSOCK:
 471                 printcolor(C_SOCK);
 472                 return (1);
 473         case S_IFIFO:
 474                 printcolor(C_FIFO);
 475                 return (1);
 476         case S_IFBLK:
 477                 printcolor(C_BLK);
 478                 return (1);
 479         case S_IFCHR:
 480                 printcolor(C_CHR);
 481                 return (1);
 482         default:;
 483         }
 484         if (mode & (S_IXUSR | S_IXGRP | S_IXOTH)) {
 485                 if (mode & S_ISUID)
 486                         printcolor(C_SUID);
 487                 else if (mode & S_ISGID)
 488                         printcolor(C_SGID);
 489                 else
 490                         printcolor(C_EXEC);
 491                 return (1);
 492         }
 493         return (0);
 494 }
 495
 496 void
 497 parsecolors(const char *cs)
 498 {
 499         int i;
 500         int j;
 501         size_t len;
 502         char c[2];
 503         short legacy_warn = 0;
 504
 505         if (cs == NULL)
 506                 cs = "";        /* LSCOLORS not set */
 507         len = strlen(cs);
 508         for (i = 0; i < C_NUMCOLORS; i++) {
 509                 colors[i].bold = 0;
 510
 511                 if (len <= 2 * (size_t)i) {
 512                         c[0] = defcolors[2 * i];
 513                         c[1] = defcolors[2 * i + 1];
 514                 } else {
 515                         c[0] = cs[2 * i];
 516                         c[1] = cs[2 * i + 1];
 517                 }
 518                 for (j = 0; j < 2; j++) {
 519                         /* Legacy colours used 0-7 */
 520                         if (c[j] >= '0' && c[j] <= '7') {
 521                                 colors[i].num[j] = c[j] - '0';
 522                                 if (!legacy_warn) {
 523                                         warnx("LSCOLORS should use "
 524                                               "characters a-h instead of 0-9 ("
 525                                               "see the manual page)\n");
 526                                 }
 527                                 legacy_warn = 1;
 528                         } else if (c[j] >= 'a' && c[j] <= 'h')
 529                                 colors[i].num[j] = c[j] - 'a';
 530                         else if (c[j] >= 'A' && c[j] <= 'H') {
 531                                 colors[i].num[j] = c[j] - 'A';
 532                                 colors[i].bold = 1;
 533                         } else if (tolower((unsigned char)c[j] == 'x'))
 534                                 colors[i].num[j] = -1;
 535                         else {
 536                                 warnx("invalid character '%c' in LSCOLORS"
 537                                       " env var\n", c[j]);
 538                                 colors[i].num[j] = -1;
 539                         }
 540                 }
 541         }
 542 }
 543
 544 void
 545 colorquit(int sig)
 546 {
 547         endcolor(sig);
 548
 549         signal(sig, SIG_DFL);
 550         kill(getpid(), sig);
 551 }
 552
 553 #endif /* COLORLS */
 554
 555 static void
 556 printlink(const FTSENT *p)
 557 {
 558         int lnklen;
 559         char name[MAXPATHLEN + 1];
 560         char path[MAXPATHLEN + 1];
 561
 562         if (p->fts_level == FTS_ROOTLEVEL)
 563                 snprintf(name, sizeof(name), "%s", p->fts_name);
 564         else
 565                 snprintf(name, sizeof(name),
 566                     "%s/%s", p->fts_parent->fts_accpath, p->fts_name);
 567         if ((lnklen = readlink(name, path, sizeof(path) - 1)) == -1) {
 568                 fprintf(stderr, "\nls: %s: %s\n", name, strerror(errno));
 569                 return;
 570         }
 571         path[lnklen] = '\0';
 572         printf(" -> ");
 573         printname(path);
 574 }
 575
 576 static void
 577 printsize(size_t width, off_t bytes)
 578 {
 579         if (f_humanval) {
 580                 char buf[5];
 581
 582                 humanize_number(buf, sizeof(buf), (int64_t)bytes, "",
 583                                 HN_AUTOSCALE, HN_B | HN_NOSPACE | HN_DECIMAL);
 584                 printf("%5s ", buf);
 585         } else
 586                 printf("%*lld ", width, bytes);
 587 }