1#! /bin/sh 2# 3# SPDX-License-Identifier: BSD-2-Clause 4# 5# Copyright (c) 2010 Gordon Tetlow 6# All rights reserved. 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# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# Rendering a manual page is fast. Even a manual page several 100k in size 31# takes less than a CPU second. If it takes much longer, it is very likely 32# that a tool like mandoc(1) is running in an infinite loop. In this case 33# it is better to terminate it. 34ulimit -t 20 35 36# do not ignore the exit status of roff tools 37set -o pipefail 38 39# Usage: add_to_manpath path 40# Adds a variable to manpath while ensuring we don't have duplicates. 41# Returns true if we were able to add something. False otherwise. 42add_to_manpath() { 43 case "$manpath" in 44 *:$1) decho " Skipping duplicate manpath entry $1" 2 ;; 45 $1:*) decho " Skipping duplicate manpath entry $1" 2 ;; 46 *:$1:*) decho " Skipping duplicate manpath entry $1" 2 ;; 47 *) if [ -d "$1" ]; then 48 decho " Adding $1 to manpath" 49 manpath="$manpath:$1" 50 return 0 51 fi 52 ;; 53 esac 54 55 return 1 56} 57 58# Usage: build_manlocales 59# Builds a correct MANLOCALES variable. 60build_manlocales() { 61 # If the user has set manlocales, who are we to argue. 62 if [ -n "$MANLOCALES" ]; then 63 return 64 fi 65 66 parse_configs 67 68 # Trim leading colon 69 MANLOCALES=${manlocales#:} 70 71 decho "Available manual locales: $MANLOCALES" 72} 73 74# Usage: build_mansect 75# Builds a correct MANSECT variable. 76build_mansect() { 77 # If the user has set mansect, who are we to argue. 78 if [ -n "$MANSECT" ]; then 79 return 80 fi 81 82 parse_configs 83 84 # Trim leading colon 85 MANSECT=${mansect#:} 86 87 if [ -z "$MANSECT" ]; then 88 MANSECT=$man_default_sections 89 fi 90 decho "Using manual sections: $MANSECT" 91} 92 93# Usage: build_manpath 94# Builds a correct MANPATH variable. 95build_manpath() { 96 local IFS 97 98 # If the user has set a manpath, who are we to argue. 99 if [ -n "$MANPATH" ]; then 100 case "$MANPATH" in 101 *:) PREPEND_MANPATH=${MANPATH} ;; 102 :*) APPEND_MANPATH=${MANPATH} ;; 103 *::*) 104 PREPEND_MANPATH=${MANPATH%%::*} 105 APPEND_MANPATH=${MANPATH#*::} 106 ;; 107 *) return ;; 108 esac 109 fi 110 111 if [ -n "$PREPEND_MANPATH" ]; then 112 IFS=: 113 for path in $PREPEND_MANPATH; do 114 add_to_manpath "$path" 115 done 116 unset IFS 117 fi 118 119 search_path 120 121 decho "Adding default manpath entries" 122 IFS=: 123 for path in $man_default_path; do 124 add_to_manpath "$path" 125 done 126 unset IFS 127 128 parse_configs 129 130 if [ -n "$APPEND_MANPATH" ]; then 131 IFS=: 132 for path in $APPEND_MANPATH; do 133 add_to_manpath "$path" 134 done 135 unset IFS 136 fi 137 # Trim leading colon 138 MANPATH=${manpath#:} 139 140 decho "Using manual path: $MANPATH" 141} 142 143# Usage: check_cat catglob 144# Checks to see if a cat glob is available. 145check_cat() { 146 if exists "$1"; then 147 use_cat=yes 148 catpage=$found 149 setup_cattool "$catpage" 150 decho " Found catpage \"$catpage\"" 151 return 0 152 else 153 return 1 154 fi 155} 156 157# Usage: check_man manglob catglob 158# Given 2 globs, figures out if the manglob is available, if so, check to 159# see if the catglob is also available and up to date. 160check_man() { 161 if exists "$1"; then 162 # We have a match, check for a cat page 163 manpage=$found 164 setup_cattool "$manpage" 165 decho " Found manpage \"$manpage\"" 166 167 if [ -n "${use_width}" ]; then 168 # non-standard width 169 unset use_cat 170 decho " Skipping catpage: non-standard page width" 171 elif exists "$2" && is_newer $found "$manpage"; then 172 # cat page found and is newer, use that 173 use_cat=yes 174 catpage=$found 175 setup_cattool "$catpage" 176 decho " Using catpage \"$catpage\"" 177 else 178 # no cat page or is older 179 unset use_cat 180 decho " Skipping catpage: not found or old" 181 fi 182 return 0 183 fi 184 185 return 1 186} 187 188# Usage: decho "string" [debuglevel] 189# Echoes to stderr string prefaced with -- if high enough debuglevel. 190decho() { 191 if [ $debug -ge ${2:-1} ]; then 192 echo "-- $1" >&2 193 fi 194} 195 196# Usage: exists glob 197# 198# Returns true if glob resolves to a real file and store the first 199# found filename in the variable $found 200exists() { 201 if [ -z "$1" ]; then 202 return 1 203 fi 204 205 local IFS 206 207 # Don't accidentally inherit callers IFS (breaks perl manpages) 208 unset IFS 209 210 # Use some globbing tricks in the shell to determine if a file 211 # exists or not. 212 set +f 213 for file in "$1"* 214 do 215 if [ -r "$file" ]; then 216 found="$file" 217 set -f 218 return 0 219 fi 220 done 221 set -f 222 223 return 1 224} 225 226# Usage: find_file path section subdir pagename 227# Returns: true if something is matched and found. 228# Search the given path/section combo for a given page. 229find_file() { 230 local manroot catroot mann man0 catn cat0 231 232 manroot="$1/man$2" 233 catroot="$1/cat$2" 234 if [ -n "$3" ]; then 235 manroot="$manroot/$3" 236 catroot="$catroot/$3" 237 fi 238 239 if [ ! -d "$manroot" -a ! -d "$catroot" ]; then 240 return 1 241 fi 242 decho " Searching directory $manroot" 2 243 244 mann="$manroot/$4.$2" 245 man0="$manroot/$4.0" 246 catn="$catroot/$4.$2" 247 cat0="$catroot/$4.0" 248 249 # This is the behavior as seen by the original man utility. 250 # Let's not change that which doesn't seem broken. 251 if check_man "$mann" "$catn"; then 252 return 0 253 elif check_man "$man0" "$cat0"; then 254 return 0 255 elif check_cat "$catn"; then 256 return 0 257 elif check_cat "$cat0"; then 258 return 0 259 fi 260 261 return 1 262} 263 264# Usage: is_newer file1 file2 265# Returns true if file1 is newer than file2 as calculated by mtime. 266is_newer() { 267 if ! [ "$1" -ot "$2" ]; then 268 decho " mtime: $1 not older than $2" 3 269 return 0 270 else 271 decho " mtime: $1 older than $2" 3 272 return 1 273 fi 274} 275 276# Usage: manpath_parse_args "$@" 277# Parses commandline options for manpath. 278manpath_parse_args() { 279 local cmd_arg 280 281 OPTIND=1 282 while getopts 'Ldq' cmd_arg; do 283 case "${cmd_arg}" in 284 L) Lflag=Lflag ;; 285 d) debug=$(( $debug + 1 )) ;; 286 q) qflag=qflag ;; 287 *) manpath_usage ;; 288 esac 289 done >&2 290} 291 292# Usage: manpath_usage 293# Display usage for the manpath(1) utility. 294manpath_usage() { 295 echo 'usage: manpath [-Ldq]' >&2 296 exit 1 297} 298 299# Usage: manpath_warnings 300# Display some warnings to stderr. 301manpath_warnings() { 302 if [ -n "$Lflag" -a -n "$MANLOCALES" ]; then 303 echo "(Warning: MANLOCALES environment variable set)" >&2 304 fi 305} 306 307# Usage: man_check_for_so path 308# Returns: True if able to resolve the file, false if it ended in tears. 309# Detects the presence of the .so directive and causes the file to be 310# redirected to another source file. 311man_check_for_so() { 312 local IFS line tstr 313 314 unset IFS 315 if [ -n "$catpage" ]; then 316 return 0 317 fi 318 319 # We need to loop to accommodate multiple .so directives. 320 while true 321 do 322 line=$($cattool "$manpage" 2>/dev/null | grep -E -m1 -v '^\.\\"[ ]*|^[ ]*$') 323 case "$line" in 324 '.so /'*) break ;; # ignore absolute path 325 '.so '*) trim "${line#.so}" 326 decho "$manpage includes $tstr" 327 # Glob and check for the file. 328 if ! check_man "$1/$tstr" ""; then 329 decho " Unable to find $tstr" 330 return 1 331 fi 332 ;; 333 *) break ;; 334 esac 335 done 336 337 return 0 338} 339 340# Usage: man_display_page 341# Display either the manpage or catpage depending on the use_cat variable 342man_display_page() { 343 local IFS pipeline testline 344 345 # We are called with IFS set to colon. This causes really weird 346 # things to happen for the variables that have spaces in them. 347 unset IFS 348 349 # If we are supposed to use a catpage and we aren't using troff(1) 350 # just zcat the catpage and we are done. 351 if [ -z "$tflag" -a -n "$use_cat" ]; then 352 if [ -n "$wflag" ]; then 353 echo "$catpage (source: \"$manpage\")" 354 ret=0 355 else 356 if [ $debug -gt 0 ]; then 357 decho "Command: $cattool \"$catpage\" | $MANPAGER" 358 ret=0 359 else 360 $cattool "$catpage" | $MANPAGER 361 ret=$? 362 fi 363 fi 364 return 365 fi 366 367 # Okay, we are using the manpage, do we just need to output the 368 # name of the manpage? 369 if [ -n "$wflag" ]; then 370 echo "$manpage" 371 ret=0 372 return 373 fi 374 375 if [ -n "$use_width" ]; then 376 mandoc_args="-O width=${use_width}" 377 fi 378 testline="mandoc -Tlint -Wunsupp >/dev/null 2>&1" 379 if [ -n "$tflag" ]; then 380 pipeline="mandoc -Tps $mandoc_args" 381 else 382 pipeline="mandoc $mandoc_args | $MANPAGER" 383 fi 384 385 if ! $cattool "$manpage" | eval "$testline"; then 386 if which -s groff; then 387 man_display_page_groff 388 else 389 echo "This manpage needs groff(1) to be rendered" >&2 390 echo "First install groff(1): " >&2 391 echo "pkg install groff " >&2 392 ret=1 393 fi 394 return 395 fi 396 397 if [ $debug -gt 0 ]; then 398 decho "Command: $cattool \"$manpage\" | eval \"$pipeline\"" 399 ret=0 400 else 401 $cattool "$manpage" | eval "$pipeline" 402 ret=$? 403 fi 404} 405 406# Usage: man_display_page_groff 407# Display the manpage using groff 408man_display_page_groff() { 409 local EQN NROFF PIC TBL TROFF REFER VGRIND 410 local IFS l nroff_dev pipeline preproc_arg tool 411 412 # So, we really do need to parse the manpage. First, figure out the 413 # device flag (-T) we have to pass to eqn(1) and groff(1). Then, 414 # setup the pipeline of commands based on the user's request. 415 416 # If the manpage is from a particular charset, we need to setup nroff 417 # to properly output for the correct device. 418 case "${manpage}" in 419 *.${man_charset}/*) 420 # I don't pretend to know this; I'm just copying from the 421 # previous version of man(1). 422 case "$man_charset" in 423 KOI8-R) nroff_dev="koi8-r" ;; 424 ISO8859-1) nroff_dev="latin1" ;; 425 ISO8859-15) nroff_dev="latin1" ;; 426 UTF-8) nroff_dev="utf8" ;; 427 *) nroff_dev="ascii" ;; 428 esac 429 430 NROFF="$NROFF -T$nroff_dev" 431 EQN="$EQN -T$nroff_dev" 432 433 # Iff the manpage is from the locale and not just the charset, 434 # then we need to define the locale string. 435 case "${manpage}" in 436 */${man_lang}_${man_country}.${man_charset}/*) 437 NROFF="$NROFF -dlocale=$man_lang.$man_charset" 438 ;; 439 */${man_lang}.${man_charset}/*) 440 NROFF="$NROFF -dlocale=$man_lang.$man_charset" 441 ;; 442 esac 443 444 # Allow language specific calls to override the default 445 # set of utilities. 446 l=$(echo $man_lang | tr [:lower:] [:upper:]) 447 for tool in EQN NROFF PIC TBL TROFF REFER VGRIND; do 448 eval "$tool=\${${tool}_$l:-\$$tool}" 449 done 450 ;; 451 *) NROFF="$NROFF -Tascii" 452 EQN="$EQN -Tascii" 453 ;; 454 esac 455 456 if [ -z "$MANCOLOR" ]; then 457 NROFF="$NROFF -P-c" 458 fi 459 460 if [ -n "${use_width}" ]; then 461 NROFF="$NROFF -rLL=${use_width}n -rLT=${use_width}n" 462 fi 463 464 if [ -n "$MANROFFSEQ" ]; then 465 set -- -$MANROFFSEQ 466 OPTIND=1 467 while getopts 'egprtv' preproc_arg; do 468 case "${preproc_arg}" in 469 e) pipeline="$pipeline | $EQN" ;; 470 g) ;; # Ignore for compatibility. 471 p) pipeline="$pipeline | $PIC" ;; 472 r) pipeline="$pipeline | $REFER" ;; 473 t) pipeline="$pipeline | $TBL" ;; 474 v) pipeline="$pipeline | $VGRIND" ;; 475 *) usage ;; 476 esac 477 done 478 # Strip the leading " | " from the resulting pipeline. 479 pipeline="${pipeline#" | "}" 480 else 481 pipeline="$TBL" 482 fi 483 484 if [ -n "$tflag" ]; then 485 pipeline="$pipeline | $TROFF" 486 else 487 pipeline="$pipeline | $NROFF | $MANPAGER" 488 fi 489 490 if [ $debug -gt 0 ]; then 491 decho "Command: $cattool \"$manpage\" | eval \"$pipeline\"" 492 ret=0 493 else 494 $cattool "$manpage" | eval "$pipeline" 495 ret=$? 496 fi 497} 498 499# Usage: man_find_and_display page 500# Search through the manpaths looking for the given page. 501man_find_and_display() { 502 local found_page locpath p path sect 503 504 # Check to see if it's a file. But only if it has a '/' in 505 # the filename. 506 case "$1" in 507 */*) if [ -f "$1" -a -r "$1" ]; then 508 decho "Found a usable page, displaying that" 509 unset use_cat 510 manpage="$1" 511 setup_cattool "$manpage" 512 p=$(cd "$(dirname "$manpage")" && pwd) 513 case "$(basename "$p")" in 514 man*|cat*) p=$p/.. ;; 515 *) p=$p/../.. ;; 516 esac 517 if man_check_for_so "$p"; then 518 found_page=yes 519 man_display_page 520 fi 521 return 522 fi 523 ;; 524 esac 525 526 IFS=: 527 for sect in $MANSECT; do 528 decho "Searching section $sect" 2 529 for path in $MANPATH; do 530 for locpath in $locpaths; do 531 p=$path/$locpath 532 p=${p%/.} # Rid ourselves of the trailing /. 533 534 # Check if there is a MACHINE specific manpath. 535 if find_file $p $sect $MACHINE "$1"; then 536 if man_check_for_so $p; then 537 found_page=yes 538 man_display_page 539 if [ -n "$aflag" ]; then 540 continue 2 541 else 542 return 543 fi 544 fi 545 fi 546 547 # Check if there is a MACHINE_ARCH 548 # specific manpath. 549 if find_file $p $sect $MACHINE_ARCH "$1"; then 550 if man_check_for_so $p; then 551 found_page=yes 552 man_display_page 553 if [ -n "$aflag" ]; then 554 continue 2 555 else 556 return 557 fi 558 fi 559 fi 560 561 # Check plain old manpath. 562 if find_file $p $sect '' "$1"; then 563 if man_check_for_so $p; then 564 found_page=yes 565 man_display_page 566 if [ -n "$aflag" ]; then 567 continue 2 568 else 569 return 570 fi 571 fi 572 fi 573 done 574 done 575 done 576 unset IFS 577 578 # Nothing? Well, we are done then. 579 if [ -z "$found_page" ]; then 580 echo "No manual entry for \"$1\"" >&2 581 ret=1 582 return 583 fi 584} 585 586# Usage: man_parse_opts "$@" 587# Parses commandline options for man. 588man_parse_opts() { 589 local cmd_arg 590 591 OPTIND=1 592 while getopts 'K:M:P:S:adfhkm:op:tw' cmd_arg; do 593 case "${cmd_arg}" in 594 K) Kflag=Kflag 595 REGEXP=$OPTARG ;; 596 M) MANPATH=$OPTARG ;; 597 P) MANPAGER=$OPTARG ;; 598 S) MANSECT=$OPTARG ;; 599 a) aflag=aflag ;; 600 d) debug=$(( $debug + 1 )) ;; 601 f) fflag=fflag ;; 602 h) man_usage 0 ;; 603 k) kflag=kflag ;; 604 m) mflag=$OPTARG ;; 605 o) oflag=oflag ;; 606 p) MANROFFSEQ=$OPTARG ;; 607 t) tflag=tflag ;; 608 w) wflag=wflag ;; 609 *) man_usage ;; 610 esac 611 done >&2 612 613 shift $(( $OPTIND - 1 )) 614 615 # Check the args for incompatible options. 616 617 case "${Kflag}${fflag}${kflag}${tflag}${wflag}" in 618 Kflagfflag*) echo "Incompatible options: -K and -f"; man_usage ;; 619 Kflag*kflag*) echo "Incompatible options: -K and -k"; man_usage ;; 620 Kflag*tflag) echo "Incompatible options: -K and -t"; man_usage ;; 621 fflagkflag*) echo "Incompatible options: -f and -k"; man_usage ;; 622 fflag*tflag*) echo "Incompatible options: -f and -t"; man_usage ;; 623 fflag*wflag) echo "Incompatible options: -f and -w"; man_usage ;; 624 *kflagtflag*) echo "Incompatible options: -k and -t"; man_usage ;; 625 *kflag*wflag) echo "Incompatible options: -k and -w"; man_usage ;; 626 *tflagwflag) echo "Incompatible options: -t and -w"; man_usage ;; 627 esac 628 629 # Short circuit for whatis(1) and apropos(1) 630 if [ -n "$fflag" ]; then 631 do_whatis "$@" 632 exit 633 fi 634 635 if [ -n "$kflag" ]; then 636 do_apropos "$@" 637 exit 638 fi 639} 640 641# Usage: man_setup 642# Setup various trivial but essential variables. 643man_setup() { 644 # Setup machine and architecture variables. 645 if [ -n "$mflag" ]; then 646 MACHINE_ARCH=${mflag%%:*} 647 MACHINE=${mflag##*:} 648 fi 649 if [ -z "$MACHINE_ARCH" ]; then 650 MACHINE_ARCH=$($SYSCTL -n hw.machine_arch) 651 fi 652 if [ -z "$MACHINE" ]; then 653 MACHINE=$($SYSCTL -n hw.machine) 654 fi 655 decho "Using architecture: $MACHINE_ARCH:$MACHINE" 656 657 setup_pager 658 build_manpath 659 build_mansect 660 man_setup_locale 661 man_setup_width 662} 663 664# Usage: man_setup_width 665# Set up page width. 666man_setup_width() { 667 local sizes 668 669 unset use_width 670 case "$MANWIDTH" in 671 [0-9]*) 672 if [ "$MANWIDTH" -gt 0 2>/dev/null ]; then 673 use_width=$MANWIDTH 674 fi 675 ;; 676 [Tt][Tt][Yy]) 677 if { sizes=$($STTY size 0>&3 2>/dev/null); } 3>&1; then 678 set -- $sizes 679 if [ $2 -gt 80 ]; then 680 use_width=$(($2-2)) 681 fi 682 fi 683 ;; 684 esac 685 if [ -n "$use_width" ]; then 686 decho "Using non-standard page width: ${use_width}" 687 else 688 decho 'Using standard page width' 689 fi 690} 691 692# Usage: man_setup_locale 693# Setup necessary locale variables. 694man_setup_locale() { 695 local lang_cc 696 local locstr 697 698 locpaths='.' 699 man_charset='US-ASCII' 700 701 # Setup locale information. 702 if [ -n "$oflag" ]; then 703 decho 'Using non-localized manpages' 704 else 705 # Use the locale tool to give us proper locale information 706 eval $( $LOCALE ) 707 708 if [ -n "$LANG" ]; then 709 locstr=$LANG 710 else 711 locstr=$LC_CTYPE 712 fi 713 714 case "$locstr" in 715 C) ;; 716 C.UTF-8) ;; 717 POSIX) ;; 718 [a-z][a-z]_[A-Z][A-Z]\.*) 719 lang_cc="${locstr%.*}" 720 man_lang="${locstr%_*}" 721 man_country="${lang_cc#*_}" 722 man_charset="${locstr#*.}" 723 locpaths="$locstr" 724 locpaths="$locpaths:$man_lang.$man_charset" 725 if [ "$man_lang" != "en" ]; then 726 locpaths="$locpaths:en.$man_charset" 727 fi 728 locpaths="$locpaths:." 729 ;; 730 *) echo 'Unknown locale, assuming C' >&2 731 ;; 732 esac 733 fi 734 735 decho "Using locale paths: $locpaths" 736} 737 738# Usage: man_usage [exitcode] 739# Display usage for the man utility. 740man_usage() { 741 echo 'Usage:' 742 echo ' man [-adho] [-t | -w] [-K regexp] [-M manpath] [-P pager] [-S mansect]' 743 echo ' [-m arch[:machine]] [-p [eprtv]] [mansect] page [...]' 744 echo ' man -f page [...] -- Emulates whatis(1)' 745 echo ' man -k page [...] -- Emulates apropos(1)' 746 747 # When exit'ing with -h, it's not an error. 748 exit ${1:-1} 749} 750 751# Usage: parse_configs 752# Reads the end-user adjustable config files. 753parse_configs() { 754 local IFS file files 755 756 if [ -n "$parsed_configs" ]; then 757 return 758 fi 759 760 unset IFS 761 762 # Read the global config first in case the user wants 763 # to override config_local. 764 if [ -r "$config_global" ]; then 765 parse_file "$config_global" 766 fi 767 768 # Glob the list of files to parse. 769 set +f 770 files=$(echo $config_local) 771 set -f 772 773 for file in $files; do 774 if [ -r "$file" ]; then 775 parse_file "$file" 776 fi 777 done 778 779 parsed_configs='yes' 780} 781 782# Usage: parse_file file 783# Reads the specified config files. 784parse_file() { 785 local file line tstr var 786 787 file="$1" 788 decho "Parsing config file: $file" 789 while read line; do 790 decho " $line" 2 791 case "$line" in 792 \#*) decho " Comment" 3 793 ;; 794 MANPATH*) decho " MANPATH" 3 795 trim "${line#MANPATH}" 796 add_to_manpath "$tstr" 797 ;; 798 MANLOCALE*) decho " MANLOCALE" 3 799 trim "${line#MANLOCALE}" 800 manlocales="$manlocales:$tstr" 801 ;; 802 MANCONFIG*) decho " MANCONFIG" 3 803 trim "${line#MANCONFIG}" 804 config_local="$tstr" 805 ;; 806 MANSECT*) decho " MANSECT" 3 807 trim "${line#MANSECT}" 808 mansect="$mansect:$tstr" 809 ;; 810 # Set variables in the form of FOO_BAR 811 *_*[\ \ ]*) var="${line%%[\ \ ]*}" 812 trim "${line#$var}" 813 eval "$var=\"$tstr\"" 814 decho " Parsed $var" 3 815 ;; 816 esac 817 done < "$file" 818} 819 820# Usage: search_path 821# Traverse $PATH looking for manpaths. 822search_path() { 823 local IFS p path 824 825 decho "Searching PATH for man directories" 826 827 IFS=: 828 for path in $PATH; do 829 if add_to_manpath "$path/man"; then 830 : 831 elif add_to_manpath "$path/MAN"; then 832 : 833 else 834 case "$path" in 835 */bin) p="${path%/bin}/share/man" 836 add_to_manpath "$p" 837 p="${path%/bin}/man" 838 add_to_manpath "$p" 839 ;; 840 esac 841 fi 842 done 843 unset IFS 844 845 if [ -z "$manpath" ]; then 846 decho ' Unable to find any manpaths, using default' 847 manpath=$man_default_path 848 fi 849} 850 851# Usage: search_whatis cmd [arglist] 852# Do the heavy lifting for apropos/whatis 853search_whatis() { 854 local IFS bad cmd f good key keywords loc opt out path rval wlist 855 856 cmd="$1" 857 shift 858 859 whatis_parse_args "$@" 860 861 build_manpath 862 build_manlocales 863 setup_pager 864 865 if [ "$cmd" = "whatis" ]; then 866 opt="-w" 867 fi 868 869 f='whatis' 870 871 IFS=: 872 for path in $MANPATH; do 873 if [ \! -d "$path" ]; then 874 decho "Skipping non-existent path: $path" 2 875 continue 876 fi 877 878 if [ -f "$path/$f" -a -r "$path/$f" ]; then 879 decho "Found whatis: $path/$f" 880 wlist="$wlist $path/$f" 881 fi 882 883 for loc in $MANLOCALES; do 884 if [ -f "$path/$loc/$f" -a -r "$path/$loc/$f" ]; then 885 decho "Found whatis: $path/$loc/$f" 886 wlist="$wlist $path/$loc/$f" 887 fi 888 done 889 done 890 unset IFS 891 892 if [ -z "$wlist" ]; then 893 echo "$cmd: no whatis databases in $MANPATH" >&2 894 exit 1 895 fi 896 897 rval=0 898 for key in $keywords; do 899 out=$(grep -Ehi $opt -- "$key" $wlist) 900 if [ -n "$out" ]; then 901 good="$good\\n$out" 902 else 903 bad="$bad\\n$key: nothing appropriate" 904 rval=1 905 fi 906 done 907 908 # Strip leading carriage return. 909 good=${good#\\n} 910 bad=${bad#\\n} 911 912 if [ -n "$good" ]; then 913 printf '%b\n' "$good" | $MANPAGER 914 fi 915 916 if [ -n "$bad" ]; then 917 printf '%b\n' "$bad" >&2 918 fi 919 920 exit $rval 921} 922 923# Usage: setup_cattool page 924# Finds an appropriate decompressor based on extension 925setup_cattool() { 926 case "$1" in 927 *.bz) cattool='/usr/bin/bzcat' ;; 928 *.bz2) cattool='/usr/bin/bzcat' ;; 929 *.gz) cattool='/usr/bin/gzcat' ;; 930 *.lzma) cattool='/usr/bin/lzcat' ;; 931 *.xz) cattool='/usr/bin/xzcat' ;; 932 *.zst) cattool='/usr/bin/zstdcat' ;; 933 *) cattool='/usr/bin/zcat -f' ;; 934 esac 935} 936 937# Usage: setup_pager 938# Correctly sets $MANPAGER 939setup_pager() { 940 # Setup pager. 941 if [ -z "$MANPAGER" ]; then 942 if [ -n "$MANCOLOR" ]; then 943 MANPAGER="less -sR" 944 else 945 if [ -n "$PAGER" ]; then 946 MANPAGER="$PAGER" 947 else 948 MANPAGER="less -s" 949 fi 950 fi 951 fi 952 decho "Using pager: $MANPAGER" 953} 954 955# Usage: trim string 956# Trims whitespace from beginning and end of a variable 957trim() { 958 tstr=$1 959 while true; do 960 case "$tstr" in 961 [\ \ ]*) tstr="${tstr##[\ \ ]}" ;; 962 *[\ \ ]) tstr="${tstr%%[\ \ ]}" ;; 963 *) break ;; 964 esac 965 done 966} 967 968# Usage: whatis_parse_args "$@" 969# Parse commandline args for whatis and apropos. 970whatis_parse_args() { 971 local cmd_arg 972 OPTIND=1 973 while getopts 'd' cmd_arg; do 974 case "${cmd_arg}" in 975 d) debug=$(( $debug + 1 )) ;; 976 *) whatis_usage ;; 977 esac 978 done >&2 979 980 shift $(( $OPTIND - 1 )) 981 982 keywords="$*" 983} 984 985# Usage: whatis_usage 986# Display usage for the whatis/apropos utility. 987whatis_usage() { 988 echo "usage: $cmd [-d] keyword [...]" 989 exit 1 990} 991 992 993 994# Supported commands 995do_apropos() { 996 [ $(stat -f %i /usr/bin/man) -ne $(stat -f %i /usr/bin/apropos) ] && \ 997 exec apropos "$@" 998 search_whatis apropos "$@" 999} 1000 1001# Usage: do_full_search reg_exp 1002# Do a full search of the regular expression passed 1003# as parameter in all man pages 1004do_full_search() { 1005 local gflags re 1006 re=${1} 1007 1008 # Build grep(1) flags 1009 gflags="-H" 1010 1011 # wflag implies -l for grep(1) 1012 if [ -n "$wflag" ]; then 1013 gflags="${gflags} -l" 1014 fi 1015 1016 gflags="${gflags} --label" 1017 1018 set +f 1019 for mpath in $(echo "${MANPATH}" | tr : '[:blank:]'); do 1020 for section in $(echo "${MANSECT}" | tr : '[:blank:]'); do 1021 for manfile in ${mpath}/man${section}/*.${section}*; do 1022 mandoc "${manfile}" 2>/dev/null | 1023 grep -E ${gflags} "${manfile}" -e "${re}" 1024 done 1025 done 1026 done 1027 set -f 1028} 1029 1030do_man() { 1031 local IFS 1032 1033 man_parse_opts "$@" 1034 man_setup 1035 1036 shift $(( $OPTIND - 1 )) 1037 IFS=: 1038 for sect in $MANSECT; do 1039 if [ "$sect" = "$1" ]; then 1040 decho "Detected manual section as first arg: $1" 1041 MANSECT="$1" 1042 shift 1043 break 1044 fi 1045 done 1046 unset IFS 1047 pages="$*" 1048 1049 if [ -z "$pages" -a -z "${Kflag}" ]; then 1050 echo 'What manual page do you want?' >&2 1051 exit 1 1052 fi 1053 1054 if [ ! -z "${Kflag}" ]; then 1055 # Short circuit because -K flag does a sufficiently 1056 # different thing like not showing the man page at all 1057 do_full_search "${REGEXP}" 1058 fi 1059 1060 for page in "$@"; do 1061 decho "Searching for \"$page\"" 1062 man_find_and_display "$page" 1063 done 1064 1065 exit ${ret:-0} 1066} 1067 1068do_manpath() { 1069 manpath_parse_args "$@" 1070 if [ -z "$qflag" ]; then 1071 manpath_warnings 1072 fi 1073 if [ -n "$Lflag" ]; then 1074 build_manlocales 1075 echo $MANLOCALES 1076 else 1077 build_manpath 1078 echo $MANPATH 1079 fi 1080 exit 0 1081} 1082 1083do_whatis() { 1084 [ $(stat -f %i /usr/bin/man) -ne $(stat -f %i /usr/bin/whatis) ] && \ 1085 exec whatis "$@" 1086 search_whatis whatis "$@" 1087} 1088 1089# User's PATH setting decides on the groff-suite to pick up. 1090EQN=eqn 1091NROFF='groff -S -P-h -Wall -mtty-char -mandoc' 1092PIC=pic 1093REFER=refer 1094TBL=tbl 1095TROFF='groff -S -mandoc' 1096VGRIND=vgrind 1097 1098LOCALE=/usr/bin/locale 1099STTY=/bin/stty 1100SYSCTL=/sbin/sysctl 1101 1102debug=0 1103man_default_sections='1:8:2:3:3lua:n:4:5:6:7:9:l' 1104man_default_path='/usr/share/man:/usr/share/openssl/man:/usr/local/share/man:/usr/local/man' 1105cattool='/usr/bin/zcat -f' 1106 1107config_global='/etc/man.conf' 1108 1109# This can be overridden via a setting in /etc/man.conf. 1110config_local='/usr/local/etc/man.d/*.conf' 1111 1112# Set noglobbing for now. I don't want spurious globbing. 1113set -f 1114 1115case "$0" in 1116*apropos) do_apropos "$@" ;; 1117*manpath) do_manpath "$@" ;; 1118*whatis) do_whatis "$@" ;; 1119*) do_man "$@" ;; 1120esac 1121