1 if [ ! "$_COMMON_SUBR" ]; then _COMMON_SUBR=1
3 # Copyright (c) 2012 Ron McDowell
4 # Copyright (c) 2012-2014 Devin Teske
7 # Redistribution and use in source and binary forms, with or without
8 # modification, are permitted provided that the following conditions
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.
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
30 ############################################################ CONFIGURATION
33 # Default file descriptors to link to stdout/stderr for passthru allowing
34 # redirection within a sub-shell to bypass directly to the terminal.
36 : ${TERMINAL_STDOUT_PASSTHRU:=3}}
37 : ${TERMINAL_STDERR_PASSTHRU:=4}}
39 ############################################################ GLOBALS
53 # Global exit status variables
59 # Operating environment details
61 export UNAME_S="$( uname -s )" # Operating System (i.e. FreeBSD)
62 export UNAME_P="$( uname -p )" # Processor Architecture (i.e. i386)
63 export UNAME_M="$( uname -m )" # Machine platform (i.e. i386)
64 export UNAME_R="$( uname -r )" # Release Level (i.e. X.Y-RELEASE)
65 if [ ! "${PKG_ABI+set}" ]; then
67 ASSUME_ALWAYS_YES=1 pkg -vv 2> /dev/null |
68 awk '$1=="ABI"{print $3;exit}'
73 # Default behavior is to call f_debug_init() automatically when loaded.
75 : ${DEBUG_SELF_INITIALIZE=1}
78 # Default behavior of f_debug_init() is to truncate $debugFile (set to NULL to
79 # disable truncating the debug file when initializing). To get child processes
80 # to append to the same log file, export this variarable (with a NULL value)
81 # and also export debugFile with the desired value.
83 : ${DEBUG_INITIALIZE_FILE=1}
86 # Define standard optstring arguments that should be supported by all programs
87 # using this include (unless DEBUG_SELF_INITIALIZE is set to NULL to prevent
88 # f_debug_init() from autamatically processing "$@" for the below arguments):
91 # D: Sets $debugFile to $OPTARG
96 # The getopts builtin will return 1 either when the end of "$@" or the first
97 # invalid flag is reached. This makes it impossible to determine if you've
98 # processed all the arguments or simply have hit an invalid flag. In the cases
99 # where we want to tolerate invalid flags (f_debug_init() for example), the
100 # following variable can be appended to your optstring argument to getopts,
101 # preventing it from prematurely returning 1 before the end of the arguments.
103 # NOTE: This assumes that all unknown flags are argument-less.
105 GETOPTS_ALLFLAGS="abcdefghijklmnopqrstuvwxyz"
106 GETOPTS_ALLFLAGS="${GETOPTS_ALLFLAGS}ABCDEFGHIJKLMNOPQRSTUVWXYZ"
107 GETOPTS_ALLFLAGS="${GETOPTS_ALLFLAGS}0123456789"
110 # When we get included, f_debug_init() will fire (unless $DEBUG_SELF_INITIALIZE
111 # is set to disable automatic initialization) and process "$@" for a few global
112 # options such as `-d' and/or `-D file'. However, if your program takes custom
113 # flags that take arguments, this automatic processing may fail unexpectedly.
115 # The solution to this problem is to pre-define (before including this file)
116 # the following variable (which defaults to NULL) to indicate that there are
117 # extra flags that should be considered when performing automatic processing of
118 # globally persistent flags.
122 ############################################################ FUNCTIONS
124 # f_dprintf $format [$arguments ...]
126 # Sensible debug function. Override in ~/.bsdconfigrc if desired.
127 # See /usr/share/examples/bsdconfig/bsdconfigrc for example.
129 # If $debug is set and non-NULL, prints DEBUG info using printf(1) syntax:
130 # + To $debugFile, if set and non-NULL
131 # + To standard output if $debugFile is either NULL or unset
132 # + To both if $debugFile begins with a single plus-sign (`+')
136 [ "$debug" ] || return $SUCCESS
137 local fmt="$1"; shift
138 case "$debugFile" in ""|+*)
139 printf "DEBUG: $fmt${fmt:+\n}" "$@" >&${TERMINAL_STDOUT_PASSTHRU:-1}
141 [ "${debugFile#+}" ] &&
142 printf "DEBUG: $fmt${fmt:+\n}" "$@" >> "${debugFile#+}"
148 # Initialize debugging. Truncates $debugFile to zero bytes if set.
153 # Process stored command-line arguments
156 local OPTIND OPTARG flag
157 f_dprintf "f_debug_init: ARGV=[%s] GETOPTS_STDARGS=[%s]" \
158 "$ARGV" "$GETOPTS_STDARGS"
159 while getopts "$GETOPTS_STDARGS$GETOPTS_EXTRA$GETOPTS_ALLFLAGS" flag \
163 D) debugFile="$OPTARG" ;;
166 shift $(( $OPTIND - 1 ))
167 f_dprintf "f_debug_init: debug=[%s] debugFile=[%s]" \
168 "$debug" "$debugFile"
171 # Automagically enable debugging if debugFile is set (and non-NULL)
173 [ "$debugFile" ] && { [ "${debug+set}" ] || debug=1; }
176 # Make debugging persistant if set
178 [ "$debug" ] && export debug
179 [ "$debugFile" ] && export debugFile
182 # Truncate debug file unless requested otherwise. Note that we will
183 # trim a leading plus (`+') from the value of debugFile to support
184 # persistant meaning that f_dprintf() should print both to standard
185 # output and $debugFile (minus the leading plus, of course).
187 local _debug_file="${debugFile#+}"
188 if [ "$_debug_file" -a "$DEBUG_INITIALIZE_FILE" ]; then
189 if ( umask 022 && :> "$_debug_file" ); then
190 f_dprintf "Successfully initialized debugFile \`%s'" \
192 f_isset debug || debug=1 # turn debugging on if not set
195 f_dprintf "Unable to initialize debugFile \`%s'" \
201 # f_err $format [$arguments ...]
203 # Print a message to stderr (fd=2).
210 # f_quietly $command [$arguments ...]
212 # Run a command quietly (quell any output to stdout or stderr)
216 "$@" > /dev/null 2>&1
219 # f_have $anything ...
221 # A wrapper to the `type' built-in. Returns true if argument is a valid shell
222 # built-in, keyword, or externally-tracked binary, otherwise false.
229 # f_getvar $var_to_get [$var_to_set]
231 # Utility function designed to go along with the already-builtin setvar.
232 # Allows clean variable name indirection without forking or sub-shells.
234 # Returns error status if the requested variable ($var_to_get) is not set.
236 # If $var_to_set is missing or NULL, the value of $var_to_get is printed to
237 # standard output for capturing in a sub-shell (which is less-recommended
238 # because of performance degredation; for example, when called in a loop).
242 local __var_to_get="$1" __var_to_set="$2"
243 [ "$__var_to_set" ] || local value
244 eval [ \"\${$__var_to_get+set}\" ]
246 eval ${__var_to_set:-value}=\"\${$__var_to_get}\"
247 eval f_dprintf '"f_getvar: var=[%s] value=[%s] r=%u"' \
248 \"\$__var_to_get\" \"\$${__var_to_set:-value}\" \$__retval
249 [ "$__var_to_set" ] || { [ "$value" ] && echo "$value"; }
255 # Check if variable $var is set. Returns success if variable is set, otherwise
260 eval [ \"\${${1%%[$IFS]*}+set}\" ]
263 # f_die [$status [$format [$arguments ...]]]
265 # Abruptly terminate due to an error optionally displaying a message in a
266 # dialog box using printf(1) syntax.
270 local status=$FAILURE
272 # If there is at least one argument, take it as the status
273 if [ $# -gt 0 ]; then
278 # If there are still arguments left, pass them to f_show_msg
279 [ $# -gt 0 ] && f_show_msg "$@"
281 # Optionally call f_clean_up() function if it exists
282 f_have f_clean_up && f_clean_up
293 exec 2>&1 # fix sh(1) bug where stderr gets lost within async-trap
297 # f_show_info $format [$arguments ...]
299 # Display a message in a dialog infobox using printf(1) syntax.
307 # Use f_dialog_infobox from dialog.subr if possible, otherwise fall
308 # back to dialog(1) (without options, making it obvious when using
309 # un-aided system dialog).
311 if f_have f_dialog_info; then
314 dialog --infobox "$msg" 0 0
318 # f_show_msg $format [$arguments ...]
320 # Display a message in a dialog box using printf(1) syntax.
328 # Use f_dialog_msgbox from dialog.subr if possible, otherwise fall
329 # back to dialog(1) (without options, making it obvious when using
330 # un-aided system dialog).
332 if f_have f_dialog_msgbox; then
333 f_dialog_msgbox "$msg"
335 dialog --msgbox "$msg" 0 0
339 # f_show_err $format [$arguments ...]
341 # Display a message in a dialog box with ``Error'' i18n title (overridden by
342 # setting msg_error) using printf(1) syntax.
349 : ${msg:=${msg_an_unknown_error_occurred:-An unknown error occurred}}
351 if [ "$_DIALOG_SUBR" ]; then
352 f_dialog_title "${msg_error:-Error}"
353 f_dialog_msgbox "$msg"
354 f_dialog_title_restore
356 dialog --title "${msg_error:-Error}" --msgbox "$msg" 0 0
361 # f_yesno $format [$arguments ...]
363 # Display a message in a dialog yes/no box using printf(1) syntax.
371 # Use f_dialog_yesno from dialog.subr if possible, otherwise fall
372 # back to dialog(1) (without options, making it obvious when using
373 # un-aided system dialog).
375 if f_have f_dialog_yesno; then
376 f_dialog_yesno "$msg"
378 dialog --yesno "$msg" 0 0
382 # f_noyes $format [$arguments ...]
384 # Display a message in a dialog yes/no box using printf(1) syntax.
385 # NOTE: THis is just like the f_yesno function except "No" is default.
393 # Use f_dialog_noyes from dialog.subr if possible, otherwise fall
394 # back to dialog(1) (without options, making it obvious when using
395 # un-aided system dialog).
397 if f_have f_dialog_noyes; then
398 f_dialog_noyes "$msg"
400 dialog --defaultno --yesno "$msg" 0 0
406 # Display a language help-file. Automatically takes $LANG and $LC_ALL into
407 # consideration when displaying $file (suffix ".$LC_ALL" or ".$LANG" will
408 # automatically be added prior to loading the language help-file).
410 # If a language has been requested by setting either $LANG or $LC_ALL in the
411 # environment and the language-specific help-file does not exist we will fall
412 # back to $file without-suffix.
414 # If the language help-file does not exist, an error is displayed instead.
419 local lang="${LANG:-$LC_ALL}"
421 [ -f "$file.$lang" ] && file="$file.$lang"
424 # Use f_dialog_textbox from dialog.subr if possible, otherwise fall
425 # back to dialog(1) (without options, making it obvious when using
426 # un-aided system dialog).
428 if f_have f_dialog_textbox; then
429 f_dialog_textbox "$file"
431 dialog --msgbox "$( cat "$file" 2>&1 )" 0 0
437 # Include a shell subroutine file.
439 # If the subroutine file exists but returns error status during loading, exit
440 # is called and execution is prematurely terminated with the same error status.
445 f_dprintf "f_include: file=[%s]" "$file"
449 # f_include_lang $file
451 # Include a language file. Automatically takes $LANG and $LC_ALL into
452 # consideration when including $file (suffix ".$LC_ALL" or ".$LANG" will
453 # automatically by added prior to loading the language file).
455 # No error is produced if (a) a language has been requested (by setting either
456 # $LANG or $LC_ALL in the environment) and (b) the language file does not
457 # exist -- in which case we will fall back to loading $file without-suffix.
459 # If the language file exists but returns error status during loading, exit
460 # is called and execution is prematurely terminated with the same error status.
465 local lang="${LANG:-$LC_ALL}"
467 f_dprintf "f_include_lang: file=[%s] lang=[%s]" "$file" "$lang"
468 if [ -f "$file.$lang" ]; then
469 . "$file.$lang" || exit $?
475 # f_usage $file [$key1 $value1 ...]
477 # Display USAGE file with optional pre-processor macro definitions. The first
478 # argument is the template file containing the usage text to be displayed. If
479 # $LANG or $LC_ALL (in order of preference, respectively) is set, ".encoding"
480 # will automatically be appended as a suffix to the provided $file pathname.
482 # When processing $file, output begins at the first line containing that is
483 # (a) not a comment, (b) not empty, and (c) is not pure-whitespace. All lines
484 # appearing after this first-line are output, including (a) comments (b) empty
485 # lines, and (c) lines that are purely whitespace-only.
487 # If additional arguments appear after $file, substitutions are made while
488 # printing the contents of the USAGE file. The pre-processor macro syntax is in
489 # the style of autoconf(1), for example:
491 # f_usage $file "FOO" "BAR"
493 # Will cause instances of "@FOO@" appearing in $file to be replaced with the
494 # text "BAR" before being printed to the screen.
496 # This function is a two-parter. Below is the awk(1) portion of the function,
497 # afterward is the sh(1) function which utilizes the below awk script.
502 if ( !found && $0 ~ /^[[:space:]]*($|#)/ ) next
510 local lang="${LANG:-$LC_ALL}"
512 f_dprintf "f_usage: file=[%s] lang=[%s]" "$file" "$lang"
517 if [ -f "$file.$lang" ]; then
518 usage=$( awk "$f_usage_awk" "$file.$lang" ) || exit $FAILURE
520 usage=$( awk "$f_usage_awk" "$file" ) || exit $FAILURE
523 while [ $# -gt 0 ]; do
526 usage=$( echo "$usage" | awk \
527 "{ gsub(/@$key@/, ENVIRON[\"value\"]); print }" )
531 f_err "%s\n" "$usage"
536 # f_index_file $keyword [$var_to_set]
538 # Process all INDEX files known to bsdconfig and return the path to first file
539 # containing a menu_selection line with a keyword portion matching $keyword.
541 # If $LANG or $LC_ALL (in order of preference, respectively) is set,
542 # "INDEX.encoding" files will be searched first.
544 # If no file is found, error status is returned along with the NULL string.
546 # If $var_to_set is NULL or missing, output is printed to stdout (which is less
547 # recommended due to performance degradation; in a loop for example).
549 # This function is a two-parter. Below is the awk(1) portion of the function,
550 # afterward is the sh(1) function which utilizes the below awk script.
553 # Variables that should be defined on the invocation line:
554 # -v keyword="keyword"
556 ( $0 ~ "^menu_selection=\"" keyword "\\|" ) {
565 local __keyword="$1" __var_to_set="$2"
566 local __lang="${LANG:-$LC_ALL}"
567 local __indexes="$BSDCFG_LIBE${BSDCFG_LIBE:+/}*/INDEX"
569 f_dprintf "f_index_file: keyword=[%s] lang=[%s]" "$__keyword" "$__lang"
571 if [ "$__lang" ]; then
572 if [ "$__var_to_set" ]; then
573 eval "$__var_to_set"='"$( awk -v keyword="$__keyword" \
574 "$f_index_file_awk" $__indexes.$__lang
575 )"' && return $SUCCESS
577 awk -v keyword="$__keyword" "$f_index_file_awk" \
578 $__indexes.$__lang && return $SUCCESS
580 # No match, fall-thru to non-i18n sources
582 if [ "$__var_to_set" ]; then
583 eval "$__var_to_set"='"$( awk -v keyword="$__keyword" \
584 "$f_index_file_awk" $__indexes )"' && return $SUCCESS
586 awk -v keyword="$__keyword" "$f_index_file_awk" $__indexes &&
590 # No match? Fall-thru to `local' libexec sources (add-on modules)
592 [ "$BSDCFG_LOCAL_LIBE" ] || return $FAILURE
593 __indexes="$BSDCFG_LOCAL_LIBE/*/INDEX"
594 if [ "$__lang" ]; then
595 if [ "$__var_to_set" ]; then
596 eval "$__var_to_set"='"$( awk -v keyword="$__keyword" \
597 "$f_index_file_awk" $__indexes.$__lang
598 )"' && return $SUCCESS
600 awk -v keyword="$__keyword" "$f_index_file_awk" \
601 $__indexes.$__lang && return $SUCCESS
603 # No match, fall-thru to non-i18n sources
605 if [ "$__var_to_set" ]; then
606 eval "$__var_to_set"='$( awk -v keyword="$__keyword" \
607 "$f_index_file_awk" $__indexes )"'
609 awk -v keyword="$__keyword" "$f_index_file_awk" $__indexes
613 # f_index_menusel_keyword $indexfile $pgm [$var_to_set]
615 # Process $indexfile and return only the keyword portion of the menu_selection
616 # line with a command portion matching $pgm.
618 # This function is for internationalization (i18n) mapping of the on-disk
619 # scriptname ($pgm) into the localized language (given language-specific
620 # $indexfile). If $LANG or $LC_ALL (in orderder of preference, respectively) is
621 # set, ".encoding" will automatically be appended as a suffix to the provided
622 # $indexfile pathname.
624 # If, within $indexfile, multiple $menu_selection values map to $pgm, only the
625 # first one will be returned. If no mapping can be made, the NULL string is
628 # If $indexfile does not exist, error status is returned with NULL.
630 # If $var_to_set is NULL or missing, output is printed to stdout (which is less
631 # recommended due to performance degradation; in a loop for example).
633 # This function is a two-parter. Below is the awk(1) portion of the function,
634 # afterward is the sh(1) function which utilizes the below awk script.
636 f_index_menusel_keyword_awk='
637 # Variables that should be defined on the invocation line:
638 # -v pgm="program_name"
641 prefix = "menu_selection=\""
642 plen = length(prefix)
646 if (!match($0, "^" prefix ".*\\|.*\"")) next
648 keyword = command = substr($0, plen + 1, RLENGTH - plen - 1)
649 sub(/^.*\|/, "", command)
650 sub(/\|.*$/, "", keyword)
652 if ( command == pgm )
661 f_index_menusel_keyword()
663 local __indexfile="$1" __pgm="$2" __var_to_set="$3"
664 local __lang="${LANG:-$LC_ALL}" __file="$__indexfile"
666 [ -f "$__indexfile.$__lang" ] && __file="$__indexfile.$__lang"
667 f_dprintf "f_index_menusel_keyword: index=[%s] pgm=[%s] lang=[%s]" \
668 "$__file" "$__pgm" "$__lang"
670 if [ "$__var_to_set" ]; then
671 setvar "$__var_to_set" "$( awk \
672 -v pgm="$__pgm" "$f_index_menusel_keyword_awk" "$__file"
675 awk -v pgm="$__pgm" "$f_index_menusel_keyword_awk" "$__file"
679 # f_index_menusel_command $indexfile $keyword [$var_to_set]
681 # Process $indexfile and return only the command portion of the menu_selection
682 # line with a keyword portion matching $keyword.
684 # This function is for mapping [possibly international] keywords into the
685 # command to be executed. If $LANG or $LC_ALL (order of preference) is set,
686 # ".encoding" will automatically be appended as a suffix to the provided
687 # $indexfile pathname.
689 # If, within $indexfile, multiple $menu_selection values map to $keyword, only
690 # the first one will be returned. If no mapping can be made, the NULL string is
693 # If $indexfile doesn't exist, error status is returned with NULL.
695 # If $var_to_set is NULL or missing, output is printed to stdout (which is less
696 # recommended due to performance degradation; in a loop for example).
698 # This function is a two-parter. Below is the awk(1) portion of the function,
699 # afterward is the sh(1) function which utilizes the below awk script.
701 f_index_menusel_command_awk='
702 # Variables that should be defined on the invocation line:
706 prefix = "menu_selection=\""
707 plen = length(prefix)
711 if (!match($0, "^" prefix ".*\\|.*\"")) next
713 keyword = command = substr($0, plen + 1, RLENGTH - plen - 1)
714 sub(/^.*\|/, "", command)
715 sub(/\|.*$/, "", keyword)
717 if ( keyword == key )
726 f_index_menusel_command()
728 local __indexfile="$1" __keyword="$2" __var_to_set="$3" __command
729 local __lang="${LANG:-$LC_ALL}" __file="$__indexfile"
731 [ -f "$__indexfile.$__lang" ] && __file="$__indexfile.$__lang"
732 f_dprintf "f_index_menusel_command: index=[%s] key=[%s] lang=[%s]" \
733 "$__file" "$__keyword" "$__lang"
735 [ -f "$__file" ] || return $FAILURE
736 __command=$( awk -v key="$__keyword" \
737 "$f_index_menusel_command_awk" "$__file" ) || return $FAILURE
740 # If the command pathname is not fully qualified fix-up/force to be
741 # relative to the $indexfile directory.
744 /*) : already fully qualified ;;
746 local __indexdir="${__indexfile%/*}"
747 [ "$__indexdir" != "$__indexfile" ] || __indexdir="."
748 __command="$__indexdir/$__command"
751 if [ "$__var_to_set" ]; then
752 setvar "$__var_to_set" "$__command"
760 # Returns true if running as init(1).
765 # When a custom init(8) performs an exec(3) to invoke a shell script,
766 # PID 1 becomes sh(1) and $PPID is set to 1 in the executed script.
768 [ ${PPID:-0} -eq 1 ] # Return status
771 # f_mounted $local_directory
772 # f_mounted -b $device
774 # Return success if a filesystem is mounted on a particular directory. If `-b'
775 # is present, instead check that the block device (or a partition thereof) is
780 local OPTIND OPTARG flag use_device=
781 while getopts b flag; do
786 shift $(( $OPTIND - 1 ))
787 if [ "$use_device" ]; then
790 "^$device([[:space:]]|p[0-9]|s[0-9]|\.nop|\.eli)"
792 [ -d "$dir" ] || return $FAILURE
793 mount | grep -Eq " on $dir \([^)]+\)$"
795 # Return status is that of last grep(1)
798 # f_eval_catch [-de] [-k $var_to_set] $funcname $utility \
799 # $format [$arguments ...]
801 # Silently evaluate a command in a sub-shell and test for error. If debugging
802 # is enabled a copy of the command and its output is sent to debug (either
803 # stdout or file depending on environment). If an error occurs, output of the
804 # command is displayed in a dialog(1) msgbox using the [above] f_show_err()
805 # function (unless optional `-d' flag is given, then no dialog).
807 # The $funcname argument is sent to debugging while the $utility argument is
808 # used in the title of the dialog box. The command that is executed as well as
809 # sent to debugging with $funcname is the product of the printf(1) syntax
810 # produced by $format with optional $arguments.
812 # The following options are supported:
814 # -d Do not use dialog(1).
815 # -e Produce error text from failed command on stderr.
816 # -k var Save output from the command in var.
821 # f_eval_catch myfunc echo 'echo "%s"' "Hello, World!"
823 # Produces the following debug output:
825 # DEBUG: myfunc: echo "Hello, World!"
826 # DEBUG: myfunc: retval=0 <output below>
832 # f_eval_catch -k contents myfunc cat 'cat "%s"' /some/file
833 # # dialog(1) Error ``cat: /some/file: No such file or directory''
834 # # contents=[cat: /some/file: No such file or directory]
836 # Produces the following debug output:
838 # DEBUG: myfunc: cat "/some/file"
839 # DEBUG: myfunc: retval=1 <output below>
840 # cat: /some/file: No such file or directory
845 # echo 123 | f_eval_catch myfunc rev rev
847 # Produces the following debug output:
850 # DEBUG: myfunc: retval=0 <output below>
856 # f_eval_catch myfunc true true
858 # Produces the following debug output:
860 # DEBUG: myfunc: true
861 # DEBUG: myfunc: retval=0 <no output>
865 # f_eval_catch -de myfunc ls 'ls "%s"' /some/dir
866 # # Output on stderr ``ls: /some/dir: No such file or directory''
870 # f_eval_catch -dek contents myfunc ls 'ls "%s"' /etc
871 # # Output from `ls' sent to stderr and also saved in $contents
875 local __no_dialog= __show_err= __var_to_set=
878 # Process local function arguments
880 local OPTIND OPTARG __flag
881 while getopts "dek:" __flag > /dev/null; do
885 k) __var_to_set="$OPTARG" ;;
888 shift $(( $OPTIND - 1 ))
890 local __funcname="$1" __utility="$2"; shift 2
891 local __cmd __output __retval
893 __cmd=$( printf -- "$@" )
894 f_dprintf "%s: %s" "$__funcname" "$__cmd" # Log command *before* eval
895 __output=$( exec 2>&1; eval "$__cmd" )
897 if [ "$__output" ]; then
898 [ "$__show_err" ] && echo "$__output" >&2
899 f_dprintf "%s: retval=%i <output below>\n%s" "$__funcname" \
900 $__retval "$__output"
902 f_dprintf "%s: retval=%i <no output>" "$__funcname" $__retval
905 ! [ "$__no_dialog" -o "$nonInteractive" -o $__retval -eq $SUCCESS ] &&
906 msg_error="${msg_error:-Error}${__utility:+: $__utility}" \
907 f_show_err "%s" "$__output"
908 # NB: f_show_err will handle NULL output appropriately
910 [ "$__var_to_set" ] && setvar "$__var_to_set" "$__output"
915 # f_count $var_to_set arguments ...
917 # Sets $var_to_set to the number of arguments minus one (the effective number
918 # of arguments following $var_to_set).
921 # f_count count dog house # count=[2]
925 setvar "$1" $(( $# - 1 ))
928 # f_count_ifs $var_to_set string ...
930 # Sets $var_to_set to the number of words (split by the internal field
931 # separator, IFS) following $var_to_set.
935 # string="word1 word2 word3"
936 # f_count_ifs count "$string" # count=[3]
937 # f_count_ifs count $string # count=[3]
941 # IFS=. f_count_ifs count www.freebsd.org # count=[3]
943 # NB: Make sure to use double-quotes if you are using a custom value for IFS
944 # and you don't want the current value to effect the result. See example 3.
949 # IFS=- f_count_ifs count "$string" # count=[3]
950 # IFS=- f_count_ifs count $string # count=[4]
954 local __var_to_set="$1"
957 setvar "$__var_to_set" $#
960 ############################################################ MAIN
963 # Trap signals so we can recover gracefully
965 trap 'f_interrupt' SIGINT
966 trap 'f_die' SIGTERM SIGPIPE SIGXCPU SIGXFSZ \
967 SIGFPE SIGTRAP SIGABRT SIGSEGV
968 trap '' SIGALRM SIGPROF SIGUSR1 SIGUSR2 SIGHUP SIGVTALRM
971 # Clone terminal stdout/stderr so we can redirect to it from within sub-shells
973 eval exec $TERMINAL_STDOUT_PASSTHRU\>\&1
974 eval exec $TERMINAL_STDERR_PASSTHRU\>\&2
977 # Self-initialize unless requested otherwise
979 f_dprintf "%s: DEBUG_SELF_INITIALIZE=[%s]" \
980 dialog.subr "$DEBUG_SELF_INITIALIZE"
981 case "$DEBUG_SELF_INITIALIZE" in
982 ""|0|[Nn][Oo]|[Oo][Ff][Ff]|[Ff][Aa][Ll][Ss][Ee]) : do nothing ;;
987 # Log our operating environment for debugging purposes
989 f_dprintf "UNAME_S=[%s] UNAME_P=[%s] UNAME_R=[%s]" \
990 "$UNAME_S" "$UNAME_P" "$UNAME_R"
992 f_dprintf "%s: Successfully loaded." common.subr