1if [ ! "$_COMMON_SUBR" ]; then _COMMON_SUBR=1 2# 3# Copyright (c) 2012 Ron McDowell 4# Copyright (c) 2012-2013 Devin Teske 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28# $FreeBSD$ 29# 30############################################################ CONFIGURATION 31 32# 33# Default file descriptors to link to stdout/stderr for passthru allowing 34# redirection within a sub-shell to bypass directly to the terminal. 35# 36: ${TERMINAL_STDOUT_PASSTHRU:=3}} 37: ${TERMINAL_STDERR_PASSTHRU:=4}} 38 39############################################################ GLOBALS 40 41# 42# Program name 43# 44pgm="${0##*/}" 45 46# 47# Program arguments 48# 49ARGC="$#" 50ARGV="$@" 51 52# 53# Global exit status variables 54# 55SUCCESS=0 56FAILURE=1 57 58# 59# Operating environment details 60# 61export UNAME_S="$(uname -s)" # Operating System (i.e. FreeBSD) 62export UNAME_P="$(uname -p)" # Processor Architecture (i.e. i386) 63export UNAME_R="$(uname -r)" # Release Level (i.e. X.Y-RELEASE) 64 65# 66# Default behavior is to call f_debug_init() automatically when loaded. 67# 68: ${DEBUG_SELF_INITIALIZE=1} 69 70# 71# Define standard optstring arguments that should be supported by all programs 72# using this include (unless DEBUG_SELF_INITIALIZE is set to NULL to prevent 73# f_debug_init() from autamatically processing "$@" for the below arguments): 74# 75# d Sets $debug to 1 76# D: Sets $debugFile to $OPTARG 77# 78GETOPTS_STDARGS="dD:" 79 80# 81# The getopts builtin will return 1 either when the end of "$@" or the first 82# invalid flag is reached. This makes it impossible to determine if you've 83# processed all the arguments or simply have hit an invalid flag. In the cases 84# where we want to tolerate invalid flags (f_debug_init() for example), the 85# following variable can be appended to your optstring argument to getopts, 86# preventing it from prematurely returning 1 before the end of the arguments. 87# 88# NOTE: This assumes that all unknown flags are argument-less. 89# 90GETOPTS_ALLFLAGS="abcdefghijklmnopqrstuvwxyz" 91GETOPTS_ALLFLAGS="${GETOPTS_ALLFLAGS}ABCDEFGHIJKLMNOPQRSTUVWXYZ" 92GETOPTS_ALLFLAGS="${GETOPTS_ALLFLAGS}0123456789" 93 94# 95# When we get included, f_debug_init() will fire (unless $DEBUG_SELF_INITIALIZE 96# is set to disable automatic initialization) and process "$@" for a few global 97# options such as `-d' and/or `-D file'. However, if your program takes custom 98# flags that take arguments, this automatic processing may fail unexpectedly. 99# 100# The solution to this problem is to pre-define (before including this file) 101# the following variable (which defaults to NULL) to indicate that there are 102# extra flags that should be considered when performing automatic processing of 103# globally persistent flags. 104# 105: ${GETOPTS_EXTRA:=} 106 107############################################################ FUNCTIONS 108 109# f_dprintf $fmt [ $opts ... ] 110# 111# Sensible debug function. Override in ~/.bsdconfigrc if desired. 112# See /usr/share/examples/bsdconfig/bsdconfigrc for example. 113# 114# If $debug is set and non-NULL, prints DEBUG info using printf(1) syntax: 115# + To $debugFile, if set and non-NULL 116# + To standard output if $debugFile is either NULL or unset 117# + To both if $debugFile begins with a single plus-sign (`+') 118# 119f_dprintf() 120{ 121 [ "$debug" ] || return $SUCCESS 122 local fmt="$1"; shift 123 case "$debugFile" in ""|+*) 124 printf "DEBUG: $fmt${fmt:+\n}" "$@" >&${TERMINAL_STDOUT_PASSTHRU:-1} 125 esac 126 [ "${debugFile#+}" ] && 127 printf "DEBUG: $fmt${fmt:+\n}" "$@" >> "${debugFile#+}" 128 return $SUCCESS 129} 130 131# f_debug_init 132# 133# Initialize debugging. Truncates $debugFile to zero bytes if set. 134# 135f_debug_init() 136{ 137 # 138 # Process stored command-line arguments 139 # 140 set -- $ARGV 141 local OPTIND 142 f_dprintf "f_debug_init: ARGV=[%s] GETOPTS_STDARGS=[%s]" \ 143 "$ARGV" "$GETOPTS_STDARGS" 144 while getopts "$GETOPTS_STDARGS$GETOPTS_EXTRA$GETOPTS_ALLFLAGS" flag \ 145 > /dev/null; do 146 case "$flag" in 147 d) debug=1 ;; 148 D) debugFile="$OPTARG" ;; 149 esac 150 done 151 shift $(( $OPTIND - 1 )) 152 f_dprintf "f_debug_init: debug=[%s] debugFile=[%s]" \ 153 "$debug" "$debugFile" 154 155 # 156 # Automagically enable debugging if debugFile is set (and non-NULL) 157 # 158 [ "$debugFile" ] && { [ "${debug+set}" ] || debug=1; } 159 160 # 161 # Make debugging persistant if set 162 # 163 [ "$debug" ] && export debug 164 [ "$debugFile" ] && export debugFile 165 166 # 167 # Truncate the debug file upon. Note that we will trim a leading plus 168 # (`+') from the value of debugFile to support persistant meaning that 169 # f_dprintf() should print both to standard output and $debugFile 170 # (minus the leading plus, of course). 171 # 172 local _debug_file="${debugFile#+}" 173 if [ "$_debug_file" ]; then 174 if ( umask 022 && :> "$_debug_file" ); then 175 f_dprintf "Successfully initialized debugFile \`%s'" \ 176 "$_debug_file" 177 [ "${debug+set}" ] || 178 debug=1 # turn debugging on if not set 179 else 180 unset debugFile 181 f_dprintf "Unable to initialize debugFile \`%s'" \ 182 "$_debug_file" 183 fi 184 fi 185} 186 187# f_err $fmt [ $opts ... ] 188# 189# Print a message to stderr (fd=2). 190# 191f_err() 192{ 193 printf "$@" >&${TERMINAL_STDERR_PASSTHRU:-2} 194} 195 196# f_quietly $command [ $arguments ... ] 197# 198# Run a command quietly (quell any output to stdout or stderr) 199# 200f_quietly() 201{ 202 "$@" > /dev/null 2>&1 203} 204 205# f_have $anything ... 206# 207# A wrapper to the `type' built-in. Returns true if argument is a valid shell 208# built-in, keyword, or externally-tracked binary, otherwise false. 209# 210f_have() 211{ 212 f_quietly type "$@" 213} 214 215# f_which $anything [$var_to_set] 216# 217# A fast built-in replacement for syntaxes such as foo=$( which bar ). In a 218# comparison of 10,000 runs of this function versus which, this function 219# completed in under 3 seconds, while `which' took almost a full minute. 220# 221# If $var_to_set is missing or NULL, output is (like which) to standard out. 222# Returns success if a match was found, failure otherwise. 223# 224f_which() 225{ 226 local __name="$1" __var_to_set="$2" 227 case "$__name" in */*|'') return $FAILURE; esac 228 local __p IFS=":" __found= 229 for __p in $PATH; do 230 local __exec="$__p/$__name" 231 [ -f "$__exec" -a -x "$__exec" ] && __found=1 && break 232 done 233 if [ "$__found" ]; then 234 if [ "$__var_to_set" ]; then 235 setvar "$__var_to_set" "$__exec" 236 else 237 echo "$__exec" 238 fi 239 return $SUCCESS 240 fi 241 return $FAILURE 242} 243 244# f_getvar $var_to_get [$var_to_set] 245# 246# Utility function designed to go along with the already-builtin setvar. 247# Allows clean variable name indirection without forking or sub-shells. 248# 249# Returns error status if the requested variable ($var_to_get) is not set. 250# 251# If $var_to_set is missing or NULL, the value of $var_to_get is printed to 252# standard output for capturing in a sub-shell (which is less-recommended 253# because of performance degredation; for example, when called in a loop). 254# 255f_getvar() 256{ 257 local __var_to_get="$1" __var_to_set="$2" 258 [ "$__var_to_set" ] || local value 259 eval ${__var_to_set:-value}=\"\${$__var_to_get}\" 260 eval [ \"\${$__var_to_get+set}\" ] 261 local __retval=$? 262 eval f_dprintf '"f_getvar: var=[%s] value=[%s] r=%u"' \ 263 \"\$__var_to_get\" \"\$${__var_to_set:-value}\" \$__retval 264 [ "$__var_to_set" ] || { [ "$value" ] && echo "$value"; } 265 return $__retval 266} 267 268# f_isset $var 269# 270# Check if variable $var is set. Returns success if variable is set, otherwise 271# returns failure. 272# 273f_isset() 274{ 275 eval [ \"\${${1%%[$IFS]*}+set}\" ] 276} 277 278# f_die [ $status [ $fmt [ $opts ... ]]] 279# 280# Abruptly terminate due to an error optionally displaying a message in a 281# dialog box using printf(1) syntax. 282# 283f_die() 284{ 285 local status=$FAILURE 286 287 # If there is at least one argument, take it as the status 288 if [ $# -gt 0 ]; then 289 status=$1 290 shift 1 # status 291 fi 292 293 # If there are still arguments left, pass them to f_show_msg 294 [ $# -gt 0 ] && f_show_msg "$@" 295 296 # Optionally call f_clean_up() function if it exists 297 f_have f_clean_up && f_clean_up 298 299 exit $status 300} 301 302# f_interrupt 303# 304# Interrupt handler. 305# 306f_interrupt() 307{ 308 exec 2>&1 # fix sh(1) bug where stderr gets lost within async-trap 309 f_die 310} 311 312# f_show_info $fmt [ $opts ... ] 313# 314# Display a message in a dialog infobox using printf(1) syntax. 315# 316f_show_info() 317{ 318 local msg 319 msg=$( printf "$@" ) 320 321 # 322 # Use f_dialog_infobox from dialog.subr if possible, otherwise fall 323 # back to dialog(1) (without options, making it obvious when using 324 # un-aided system dialog). 325 # 326 if f_have f_dialog_info; then 327 f_dialog_info "$msg" 328 else 329 dialog --infobox "$msg" 0 0 330 fi 331} 332 333# f_show_msg $fmt [ $opts ... ] 334# 335# Display a message in a dialog box using printf(1) syntax. 336# 337f_show_msg() 338{ 339 local msg 340 msg=$( printf "$@" ) 341 342 # 343 # Use f_dialog_msgbox from dialog.subr if possible, otherwise fall 344 # back to dialog(1) (without options, making it obvious when using 345 # un-aided system dialog). 346 # 347 if f_have f_dialog_msgbox; then 348 f_dialog_msgbox "$msg" 349 else 350 dialog --msgbox "$msg" 0 0 351 fi 352} 353 354 355# f_yesno $fmt [ $opts ... ] 356# 357# Display a message in a dialog yes/no box using printf(1) syntax. 358# 359f_yesno() 360{ 361 local msg 362 msg=$( printf "$@" ) 363 364 # 365 # Use f_dialog_yesno from dialog.subr if possible, otherwise fall 366 # back to dialog(1) (without options, making it obvious when using 367 # un-aided system dialog). 368 # 369 if f_have f_dialog_yesno; then 370 f_dialog_yesno "$msg" 371 else 372 dialog --yesno "$msg" 0 0 373 fi 374} 375 376# f_noyes $fmt [ $opts ... ] 377# 378# Display a message in a dialog yes/no box using printf(1) syntax. 379# NOTE: THis is just like the f_yesno function except "No" is default. 380# 381f_noyes() 382{ 383 local msg 384 msg=$( printf "$@" ) 385 386 # 387 # Use f_dialog_noyes from dialog.subr if possible, otherwise fall 388 # back to dialog(1) (without options, making it obvious when using 389 # un-aided system dialog). 390 # 391 if f_have f_dialog_noyes; then 392 f_dialog_noyes "$msg" 393 else 394 dialog --defaultno --yesno "$msg" 0 0 395 fi 396} 397 398# f_show_help $file 399# 400# Display a language help-file. Automatically takes $LANG and $LC_ALL into 401# consideration when displaying $file (suffix ".$LC_ALL" or ".$LANG" will 402# automatically be added prior to loading the language help-file). 403# 404# If a language has been requested by setting either $LANG or $LC_ALL in the 405# environment and the language-specific help-file does not exist we will fall 406# back to $file without-suffix. 407# 408# If the language help-file does not exist, an error is displayed instead. 409# 410f_show_help() 411{ 412 local file="$1" 413 local lang="${LANG:-$LC_ALL}" 414 415 [ -f "$file.$lang" ] && file="$file.$lang" 416 417 # 418 # Use f_dialog_textbox from dialog.subr if possible, otherwise fall 419 # back to dialog(1) (without options, making it obvious when using 420 # un-aided system dialog). 421 # 422 if f_have f_dialog_textbox; then 423 f_dialog_textbox "$file" 424 else 425 dialog --msgbox "$( cat "$file" 2>&1 )" 0 0 426 fi 427} 428 429# f_include $file 430# 431# Include a shell subroutine file. 432# 433# If the subroutine file exists but returns error status during loading, exit 434# is called and execution is prematurely terminated with the same error status. 435# 436f_include() 437{ 438 local file="$1" 439 f_dprintf "f_include: file=[%s]" "$file" 440 . "$file" || exit $? 441} 442 443# f_include_lang $file 444# 445# Include a language file. Automatically takes $LANG and $LC_ALL into 446# consideration when including $file (suffix ".$LC_ALL" or ".$LANG" will 447# automatically by added prior to loading the language file). 448# 449# No error is produced if (a) a language has been requested (by setting either 450# $LANG or $LC_ALL in the environment) and (b) the language file does not 451# exist -- in which case we will fall back to loading $file without-suffix. 452# 453# If the language file exists but returns error status during loading, exit 454# is called and execution is prematurely terminated with the same error status. 455# 456f_include_lang() 457{ 458 local file="$1" 459 local lang="${LANG:-$LC_ALL}" 460 461 f_dprintf "f_include_lang: file=[%s] lang=[%s]" "$file" "$lang" 462 if [ -f "$file.$lang" ]; then 463 . "$file.$lang" || exit $? 464 else 465 . "$file" || exit $? 466 fi 467} 468 469# f_usage $file [ $key1 $value1 ... ] 470# 471# Display USAGE file with optional pre-processor macro definitions. The first 472# argument is the template file containing the usage text to be displayed. If 473# $LANG or $LC_ALL (in order of preference, respectively) is set, ".encoding" 474# will automatically be appended as a suffix to the provided $file pathname. 475# 476# When processing $file, output begins at the first line containing that is 477# (a) not a comment, (b) not empty, and (c) is not pure-whitespace. All lines 478# appearing after this first-line are output, including (a) comments (b) empty 479# lines, and (c) lines that are purely whitespace-only. 480# 481# If additional arguments appear after $file, substitutions are made while 482# printing the contents of the USAGE file. The pre-processor macro syntax is in 483# the style of autoconf(1), for example: 484# 485# f_usage $file "FOO" "BAR" 486# 487# Will cause instances of "@FOO@" appearing in $file to be replaced with the 488# text "BAR" before bering printed to the screen. 489# 490# This function is a two-parter. Below is the awk(1) portion of the function, 491# afterward is the sh(1) function which utilizes the below awk script. 492# 493f_usage_awk=' 494BEGIN { found = 0 } 495{ 496 if ( !found && $0 ~ /^[[:space:]]*($|#)/ ) next 497 found = 1 498 print 499} 500' 501f_usage() 502{ 503 local file="$1" 504 local lang="${LANG:-$LC_ALL}" 505 506 f_dprintf "f_usage: file=[%s] lang=[%s]" "$file" "$lang" 507 508 shift 1 # file 509 510 local usage 511 if [ -f "$file.$lang" ]; then 512 usage=$( awk "$f_usage_awk" "$file.$lang" ) || exit $FAILURE 513 else 514 usage=$( awk "$f_usage_awk" "$file" ) || exit $FAILURE 515 fi 516 517 while [ $# -gt 0 ]; do 518 local key="$1" 519 export value="$2" 520 usage=$( echo "$usage" | awk \ 521 "{ gsub(/@$key@/, ENVIRON[\"value\"]); print }" ) 522 shift 2 523 done 524 525 f_err "%s\n" "$usage" 526 527 exit $FAILURE 528} 529 530# f_index_file $keyword 531# 532# Process all INDEX files known to bsdconfig and return the path to first file 533# containing a menu_selection line with a keyword portion matching $keyword. 534# 535# If $LANG or $LC_ALL (in order of preference, respectively) is set, 536# "INDEX.encoding" files will be searched first. 537# 538# If no file is found, error status is returned along with the NULL string. 539# 540# This function is a two-parter. Below is the awk(1) portion of the function, 541# afterward is the sh(1) function which utilizes the below awk script. 542# 543f_index_file_awk=' 544# Variables that should be defined on the invocation line: 545# -v keyword="keyword" 546BEGIN { found = 0 } 547( $0 ~ "^menu_selection=\"" keyword "\\|" ) { 548 print FILENAME 549 found++ 550 exit 551} 552END { exit ! found } 553' 554f_index_file() 555{ 556 local keyword="$1" 557 local lang="${LANG:-$LC_ALL}" 558 559 f_dprintf "f_index_file: keyword=[%s] lang=[%s]" "$keyword" "$lang" 560 561 if [ "$lang" ]; then 562 awk -v keyword="$keyword" "$f_index_file_awk" \ 563 $BSDCFG_LIBE${BSDCFG_LIBE:+/}*/INDEX.$lang && return 564 # No match, fall-thru to non-i18n sources 565 fi 566 awk -v keyword="$keyword" "$f_index_file_awk" \ 567 $BSDCFG_LIBE${BSDCFG_LIBE:+/}*/INDEX && return 568 569 # No match? Fall-thru to `local' libexec sources (add-on modules) 570 571 [ "$BSDCFG_LOCAL_LIBE" ] || return $FAILURE 572 if [ "$lang" ]; then 573 awk -v keyword="$keyword" "$f_index_file_awk" \ 574 $BSDCFG_LOCAL_LIBE/*/INDEX.$lang && return 575 # No match, fall-thru to non-i18n sources 576 fi 577 awk -v keyword="$keyword" "$f_index_file_awk" \ 578 $BSDCFG_LOCAL_LIBE/*/INDEX 579} 580 581# f_index_menusel_keyword $indexfile $pgm 582# 583# Process $indexfile and return only the keyword portion of the menu_selection 584# line with a command portion matching $pgm. 585# 586# This function is for internationalization (i18n) mapping of the on-disk 587# scriptname ($pgm) into the localized language (given language-specific 588# $indexfile). If $LANG or $LC_ALL (in orderder of preference, respectively) is 589# set, ".encoding" will automatically be appended as a suffix to the provided 590# $indexfile pathname. 591# 592# If, within $indexfile, multiple $menu_selection values map to $pgm, only the 593# first one will be returned. If no mapping can be made, the NULL string is 594# returned. 595# 596# If $indexfile does not exist, error status is returned with NULL. 597# 598# This function is a two-parter. Below is the awk(1) portion of the function, 599# afterward is the sh(1) function which utilizes the below awk script. 600# 601f_index_menusel_keyword_awk=' 602# Variables that should be defined on the invocation line: 603# -v pgm="program_name" 604# 605BEGIN { 606 prefix = "menu_selection=\"" 607 plen = length(prefix) 608 found = 0 609} 610{ 611 if (!match($0, "^" prefix ".*\\|.*\"")) next 612 613 keyword = command = substr($0, plen + 1, RLENGTH - plen - 1) 614 sub(/^.*\|/, "", command) 615 sub(/\|.*$/, "", keyword) 616 617 if ( command == pgm ) 618 { 619 print keyword 620 found++ 621 exit 622 } 623} 624END { exit ! found } 625' 626f_index_menusel_keyword() 627{ 628 local indexfile="$1" pgm="$2" 629 local lang="${LANG:-$LC_ALL}" 630 631 f_dprintf "f_index_menusel_keyword: index=[%s] pgm=[%s] lang=[%s]" \ 632 "$indexfile" "$pgm" "$lang" 633 634 if [ -f "$indexfile.$lang" ]; then 635 awk -v pgm="$pgm" \ 636 "$f_index_menusel_keyword_awk" \ 637 "$indexfile.$lang" 638 elif [ -f "$indexfile" ]; then 639 awk -v pgm="$pgm" \ 640 "$f_index_menusel_keyword_awk" \ 641 "$indexfile" 642 fi 643} 644 645# f_index_menusel_command $indexfile $keyword 646# 647# Process $indexfile and return only the command portion of the menu_selection 648# line with a keyword portion matching $keyword. 649# 650# This function is for mapping [possibly international] keywords into the 651# command to be executed. If $LANG or $LC_ALL (order of preference) is set, 652# ".encoding" will automatically be appended as a suffix to the provided 653# $indexfile pathname. 654# 655# If, within $indexfile, multiple $menu_selection values map to $keyword, only 656# the first one will be returned. If no mapping can be made, the NULL string is 657# returned. 658# 659# If $indexfile doesn't exist, error status is returned with NULL. 660# 661# This function is a two-parter. Below is the awk(1) portion of the function, 662# afterward is the sh(1) function which utilizes the below awk script. 663# 664f_index_menusel_command_awk=' 665# Variables that should be defined on the invocation line: 666# -v key="keyword" 667# 668BEGIN { 669 prefix = "menu_selection=\"" 670 plen = length(prefix) 671 found = 0 672} 673{ 674 if (!match($0, "^" prefix ".*\\|.*\"")) next 675 676 keyword = command = substr($0, plen + 1, RLENGTH - plen - 1) 677 sub(/^.*\|/, "", command) 678 sub(/\|.*$/, "", keyword) 679 680 if ( keyword == key ) 681 { 682 print command 683 found++ 684 exit 685 } 686} 687END { exit ! found } 688' 689f_index_menusel_command() 690{ 691 local indexfile="$1" keyword="$2" command 692 local lang="${LANG:-$LC_ALL}" 693 694 f_dprintf "f_index_menusel_command: index=[%s] key=[%s] lang=[%s]" \ 695 "$indexfile" "$keyword" "$lang" 696 697 if [ -f "$indexfile.$lang" ]; then 698 command=$( awk -v key="$keyword" \ 699 "$f_index_menusel_command_awk" \ 700 "$indexfile.$lang" ) || return $FAILURE 701 elif [ -f "$indexfile" ]; then 702 command=$( awk -v key="$keyword" \ 703 "$f_index_menusel_command_awk" \ 704 "$indexfile" ) || return $FAILURE 705 else 706 return $FAILURE 707 fi 708 709 # 710 # If the command pathname is not fully qualified fix-up/force to be 711 # relative to the $indexfile directory. 712 # 713 case "$command" in 714 /*) : already fully qualified ;; 715 *) 716 local indexdir="${indexfile%/*}" 717 [ "$indexdir" != "$indexfile" ] || indexdir="." 718 command="$indexdir/$command" 719 esac 720 721 echo "$command" 722} 723 724# f_running_as_init 725# 726# Returns true if running as init(1). 727# 728f_running_as_init() 729{ 730 # 731 # When a custom init(8) performs an exec(3) to invoke a shell script, 732 # PID 1 becomes sh(1) and $PPID is set to 1 in the executed script. 733 # 734 [ ${PPID:-0} -eq 1 ] # Return status 735} 736 737# f_mounted $local_directory 738# 739# Return success if a filesystem is mounted on a particular directory. 740# 741f_mounted() 742{ 743 local dir="$1" 744 [ -d "$dir" ] || return $FAILURE 745 mount | grep -Eq " on $dir \([^)]+\)$" 746} 747 748############################################################ MAIN 749 750# 751# Trap signals so we can recover gracefully 752# 753trap 'f_interrupt' SIGINT 754trap 'f_die' SIGTERM SIGPIPE SIGXCPU SIGXFSZ \ 755 SIGFPE SIGTRAP SIGABRT SIGSEGV 756trap '' SIGALRM SIGPROF SIGUSR1 SIGUSR2 SIGHUP SIGVTALRM 757 758# 759# Clone terminal stdout/stderr so we can redirect to it from within sub-shells 760# 761eval exec $TERMINAL_STDOUT_PASSTHRU\>\&1 762eval exec $TERMINAL_STDERR_PASSTHRU\>\&2 763 764# 765# Self-initialize unless requested otherwise 766# 767f_dprintf "%s: DEBUG_SELF_INITIALIZE=[%s]" \ 768 dialog.subr "$DEBUG_SELF_INITIALIZE" 769case "$DEBUG_SELF_INITIALIZE" in 770""|0|[Nn][Oo]|[Oo][Ff][Ff]|[Ff][Aa][Ll][Ss][Ee]) : do nothing ;; 771*) f_debug_init 772esac 773 774# 775# Log our operating environment for debugging purposes 776# 777f_dprintf "UNAME_S=[%s] UNAME_P=[%s] UNAME_R=[%s]" \ 778 "$UNAME_S" "$UNAME_P" "$UNAME_R" 779 780f_dprintf "%s: Successfully loaded." common.subr 781 782fi # ! $_COMMON_SUBR 783