usr.sbin/sysrc/sysrc

   1 #!/bin/sh
   2 #-
   3 # Copyright (c) 2010-2015 Devin Teske
   4 # All rights reserved.
   5 #
   6 # Redistribution and use in source and binary forms, with or without
   7 # modification, are permitted provided that the following conditions
   8 # are met:
   9 # 1. Redistributions of source code must retain the above copyright
  10 #    notice, this list of conditions and the following disclaimer.
  11 # 2. Redistributions in binary form must reproduce the above copyright
  12 #    notice, this list of conditions and the following disclaimer in the
  13 #    documentation and/or other materials provided with the distribution.
  14 #
  15 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25 # SUCH DAMAGE.
  26 #
  27 # $FreeBSD$
  28 #
  29 ############################################################ INCLUDES
  30
  31 # Prevent `-d' from being interpreted as a debug flag by common.subr
  32 DEBUG_SELF_INITIALIZE=
  33
  34 BSDCFG_SHARE="/usr/share/bsdconfig"
  35 [ "$_COMMON_SUBR" ] || . $BSDCFG_SHARE/common.subr || exit 1
  36 [ "$_SYSRC_SUBR"  ] || f_include $BSDCFG_SHARE/sysrc.subr
  37
  38 ############################################################ GLOBALS
  39
  40 #
  41 # Version information
  42 #
  43 SYSRC_VERSION="6.3 Mar-4,2015"
  44
  45 #
  46 # Options
  47 #
  48 CHECK_ONLY=
  49 DELETE=
  50 DESCRIBE=
  51 IGNORE_UNKNOWNS=
  52 JAIL=
  53 QUIET=
  54 ROOTDIR=
  55 SHOW_ALL=
  56 SHOW_EQUALS=
  57 SHOW_FILE=
  58 SHOW_NAME=1
  59 SHOW_VALUE=1
  60 SYSRC_VERBOSE=
  61
  62 ############################################################ FUNCTIONS
  63
  64 # die [ $fmt [ $opts ... ]]
  65 #
  66 # Optionally print a message to stderr before exiting with failure status.
  67 #
  68 die()
  69 {
  70         local fmt="$1"
  71         [ $# -gt 0 ] && shift 1
  72         [  "$fmt"  ] && f_err "$fmt\n" "$@"
  73
  74         exit $FAILURE
  75 }
  76
  77 # usage
  78 #
  79 # Prints a short syntax statement and exits.
  80 #
  81 usage()
  82 {
  83         f_err "Usage: %s [OPTIONS] name[[+|-]=value] ...\n" "$pgm"
  84         f_err "Try \`%s --help' for more information.\n" "$pgm"
  85         die
  86 }
  87
  88 # help
  89 #
  90 # Prints a full syntax statement and exits.
  91 #
  92 help()
  93 {
  94         local optfmt="\t%-11s%s\n"
  95         local envfmt="\t%-17s%s\n"
  96
  97         f_err "Usage: %s [OPTIONS] name[[+|-]=value] ...\n" "$pgm"
  98
  99         f_err "OPTIONS:\n"
 100         f_err "$optfmt" "-a" \
 101               "Dump a list of all non-default configuration variables."
 102         f_err "$optfmt" "-A" \
 103               "Dump a list of all configuration variables (incl. defaults)."
 104         f_err "$optfmt" "-c" \
 105               "Check. Return success if set or no changes, else error."
 106         f_err "$optfmt" "-d" \
 107               "Print a description of the given variable."
 108         f_err "$optfmt" "-D" \
 109               "Show default value(s) only (this is the same as setting"
 110         f_err "$optfmt" "" \
 111               "RC_CONFS to NULL or passing \`-f' with a NULL file-argument)."
 112         f_err "$optfmt" "-e" \
 113               "Print query results as \`var=value' (useful for producing"
 114         f_err "$optfmt" "" \
 115               "output to be fed back in). Ignored if \`-n' is specified."
 116         f_err "$optfmt" "-f file" \
 117               "Operate on the specified file(s) instead of rc_conf_files."
 118         f_err "$optfmt" "" \
 119               "Can be specified multiple times for additional files."
 120         f_err "$optfmt" "-F" \
 121               "Show only the last rc.conf(5) file each directive is in."
 122         f_err "$optfmt" "-h" \
 123               "Print a short usage statement to stderr and exit."
 124         f_err "$optfmt" "--help" \
 125               "Print this message to stderr and exit."
 126         f_err "$optfmt" "-i" \
 127               "Ignore unknown variables."
 128         f_err "$optfmt" "-j jail" \
 129               "The jid or name of the jail to operate within (overrides"
 130         f_err "$optfmt" "" \
 131               "\`-R dir'; requires jexec(8))."
 132         f_err "$optfmt" "-n" \
 133               "Show only variable values, not their names."
 134         f_err "$optfmt" "-N" \
 135               "Show only variable names, not their values."
 136         f_err "$optfmt" "-q" \
 137               "Quiet. Disable verbose and hide certain errors."
 138         f_err "$optfmt" "-R dir" \
 139               "Operate within the root directory \`dir' rather than \`/'."
 140         f_err "$optfmt" "-v" \
 141               "Verbose. Print the pathname of the specific rc.conf(5)"
 142         f_err "$optfmt" "" \
 143               "file where the directive was found."
 144         f_err "$optfmt" "--version" \
 145               "Print version information to stdout and exit."
 146         f_err "$optfmt" "-x" \
 147               "Remove variable(s) from specified file(s)."
 148         f_err "\n"
 149
 150         f_err "ENVIRONMENT:\n"
 151         f_err "$envfmt" "RC_CONFS" \
 152               "Override default rc_conf_files (even if set to NULL)."
 153         f_err "$envfmt" "RC_DEFAULTS" \
 154               "Location of \`/etc/defaults/rc.conf' file."
 155
 156         die
 157 }
 158
 159 # jail_depend
 160 #
 161 # Dump dependencies such as language-file variables and include files to stdout
 162 # to be piped-into sh(1) running via jexec(8)/chroot(8). As a security measure,
 163 # this prevents existing language files and library files from being loaded in
 164 # the jail. This also relaxes the requirement to have these files in every jail
 165 # before sysrc can be used on said jail.
 166 #
 167 jail_depend()
 168 {
 169         #
 170         # Indicate that we are jailed
 171         #
 172         echo export _SYSRC_JAILED=1
 173
 174         #
 175         # Print i18n language variables (their current values are sanitized
 176         # and re-printed for interpretation so that the i18n language files
 177         # do not need to exist within the jail).
 178         #
 179         local var val
 180         for var in \
 181                 msg_cannot_create_permission_denied \
 182                 msg_permission_denied \
 183                 msg_previous_syntax_errors \
 184         ; do
 185                 val=$( eval echo \"\$$var\" |
 186                         awk '{ gsub(/'\''/, "'\''\\'\'\''"); print }' )
 187                 echo $var="'$val'"
 188         done
 189
 190         #
 191         # Print include dependencies
 192         #
 193         echo DEBUG_SELF_INITIALIZE=
 194         cat $BSDCFG_SHARE/common.subr
 195         cat $BSDCFG_SHARE/sysrc.subr
 196 }
 197
 198 ############################################################ MAIN SOURCE
 199
 200 #
 201 # Perform sanity checks
 202 #
 203 [ $# -gt 0 ] || usage
 204
 205 #
 206 # Check for `--help' and `--version' command-line option
 207 #
 208 ( # Operate in sub-shell to protect $@ in parent
 209         while [ $# -gt 0 ]; do
 210                 case "$1" in
 211                 --help) help ;;
 212                 --version) # see GLOBALS
 213                         echo "$SYSRC_VERSION"
 214                         exit 1 ;;
 215                 -[fRj]) # These flags take an argument
 216                         shift 1 ;;
 217                 esac
 218                 shift 1
 219         done
 220         exit 0
 221 ) || die
 222
 223 #
 224 # Process command-line flags
 225 #
 226 while getopts aAcdDef:Fhij:nNqR:vxX flag; do
 227         case "$flag" in
 228         a) SHOW_ALL=${SHOW_ALL:-1};;
 229         A) SHOW_ALL=2;;
 230         c) CHECK_ONLY=1;;
 231         d) DESCRIBE=1;;
 232         D) RC_CONFS=;;
 233         e) SHOW_EQUALS=1;;
 234         f) RC_CONFS="$RC_CONFS${RC_CONFS:+ }$OPTARG";;
 235         F) SHOW_FILE=1;;
 236         h) usage;;
 237         i) IGNORE_UNKNOWNS=1;;
 238         j) [ "$OPTARG" ] || die \
 239                 "%s: Missing or null argument to \`-j' flag" "$pgm"
 240            JAIL="$OPTARG";;
 241         n) SHOW_NAME=;;
 242         N) SHOW_VALUE=;;
 243         q) QUIET=1 SYSRC_VERBOSE=;;
 244         R) [ "$OPTARG" ] || die \
 245                 "%s: Missing or null argument to \`-R' flag" "$pgm"
 246            ROOTDIR="$OPTARG";;
 247         v) SYSRC_VERBOSE=1 QUIET=;;
 248         x) DELETE=${DELETE:-1};;
 249         X) DELETE=2;;
 250         \?) usage;;
 251         esac
 252 done
 253 shift $(( $OPTIND - 1 ))
 254
 255 #
 256 # [More] Sanity checks (e.g., "sysrc --")
 257 #
 258 [ $# -eq 0 -a ! "$SHOW_ALL" ] && usage
 259
 260 #
 261 # Taint-check all rc.conf(5) files
 262 #
 263 errmsg="$pgm: Exiting due to previous syntax errors"
 264 if [ "${RC_CONFS+set}" ]; then
 265         ( for i in $RC_CONFS; do
 266                 [ -e "$i" ] || continue
 267                 /bin/sh -n "$i" || exit $FAILURE
 268           done
 269           exit $SUCCESS
 270         ) || die "$errmsg"
 271 else
 272         /bin/sh -n "$RC_DEFAULTS" || die "$errmsg"
 273         ( . "$RC_DEFAULTS"
 274           for i in $rc_conf_files; do
 275                 [ -e "$i" ] || continue
 276                 /bin/sh -n "$i" || exit $FAILURE
 277           done
 278           exit $SUCCESS
 279         ) || die "$errmsg"
 280 fi
 281
 282 #
 283 # Process `-x' (and secret `-X') command-line options
 284 #
 285 errmsg="$pgm: \`-x' option incompatible with \`-a'/\`-A' options"
 286 errmsg="$errmsg (use \`-X' to override)"
 287 if [ "$DELETE" -a "$SHOW_ALL" ]; then
 288         [ "$DELETE" = "2" ] || die "$errmsg"
 289 fi
 290
 291 #
 292 # Pre-flight for `-c' command-line option
 293 #
 294 [ "$CHECK_ONLY" -a "$SHOW_ALL" ] &&
 295         die "$pgm: \`-c' option incompatible with \`-a'/\`-A' options"
 296
 297 #
 298 # Process `-e', `-n', and `-N' command-line options
 299 #
 300 SEP=': '
 301 [ "$SHOW_FILE" ] && SHOW_EQUALS=
 302 [ "$SHOW_NAME" ] || SHOW_EQUALS=
 303 [ "$SYSRC_VERBOSE" = "0" ] && SYSRC_VERBOSE=
 304 if [ ! "$SHOW_VALUE" ]; then
 305         SHOW_NAME=1
 306         SHOW_EQUALS=
 307 fi
 308 [ "$SHOW_EQUALS" ] && SEP='="'
 309
 310 #
 311 # Process `-j jail' and `-R dir' command-line options
 312 #
 313 if [ "$JAIL" -o "$ROOTDIR" ]; then
 314         #
 315         # Reconstruct the arguments that we want to carry-over
 316         #
 317         args="
 318                 ${SYSRC_VERBOSE:+-v}
 319                 ${QUIET:+-q}
 320                 $( [ "$DELETE" = "1" ] && echo \ -x )
 321                 $( [ "$DELETE" = "2" ] && echo \ -X )
 322                 $( [ "$SHOW_ALL" = "1" ] && echo \ -a )
 323                 $( [ "$SHOW_ALL" = "2" ] && echo \ -A )
 324                 ${CHECK_ONLY:+-c}
 325                 ${DESCRIBE:+-d}
 326                 ${SHOW_EQUALS:+-e}
 327                 ${IGNORE_UNKNOWNS:+-i}
 328                 $( [ "$SHOW_NAME"  ] || echo \ -n )
 329                 $( [ "$SHOW_VALUE" ] || echo \ -N )
 330                 $( [ "$SHOW_FILE"  ] && echo \ -F )
 331         "
 332         if [ "${RC_CONFS+set}" ]; then
 333                 args="$args -f '$RC_CONFS'"
 334         fi
 335         for arg in "$@"; do
 336                 args="$args '$arg'"
 337         done
 338
 339         #
 340         # If both are supplied, `-j jail' supercedes `-R dir'
 341         #
 342         if [ "$JAIL" ]; then
 343                 #
 344                 # Re-execute ourselves with sh(1) via jexec(8)
 345                 #
 346                 ( echo set -- $args
 347                   jail_depend
 348                   cat $0
 349                 ) | env - RC_DEFAULTS="$RC_DEFAULTS" \
 350                         /usr/sbin/jexec "$JAIL" /bin/sh
 351                 exit $?
 352         elif [ "$ROOTDIR" ]; then
 353                 #
 354                 # Make sure that the root directory specified is not to any
 355                 # running jails.
 356                 #
 357                 # NOTE: To maintain backward compatibility with older jails on
 358                 # older systems, we will not perform this check if either the
 359                 # jls(1) or jexec(8) utilities are missing.
 360                 #
 361                 if f_have jexec && f_have jls; then
 362                         jid="`jls jid path | \
 363                         (
 364                                 while read JID JROOT; do
 365                                         [ "$JROOT" = "$ROOTDIR" ] || continue
 366                                         echo $JID
 367                                 done
 368                         )`"
 369
 370                         #
 371                         # If multiple running jails match the specified root
 372                         # directory, exit with error.
 373                         #
 374                         if [ "$jid" -a "${jid%[$IFS]*}" != "$jid" ]; then
 375                                 die "%s: %s: %s" "$pgm" "$ROOTDIR" \
 376                                     "$( echo "Multiple jails claim this" \
 377                                              "directory as their root." \
 378                                              "(use \`-j jail' instead)" )"
 379                         fi
 380
 381                         #
 382                         # If only a single running jail matches the specified
 383                         # root directory, implicitly use `-j jail'.
 384                         #
 385                         if [ "$jid" ]; then
 386                                 #
 387                                 # Re-execute outselves with sh(1) via jexec(8)
 388                                 #
 389                                 ( echo set -- $args
 390                                   jail_depend
 391                                   cat $0
 392                                 ) | env - RC_DEFAULTS="$RC_DEFAULTS" \
 393                                         /usr/sbin/jexec "$jid" /bin/sh
 394                                 exit $?
 395                         fi
 396
 397                         # Otherwise, fall through and allow chroot(8)
 398                 fi
 399
 400                 #
 401                 # Re-execute ourselves with sh(1) via chroot(8)
 402                 #
 403                 ( echo set -- $args
 404                   jail_depend
 405                   cat $0
 406                 ) | env - RC_DEFAULTS="$RC_DEFAULTS" \
 407                         /usr/sbin/chroot "$ROOTDIR" /bin/sh
 408                 exit $?
 409         fi
 410 fi
 411
 412 #
 413 # Process `-a' or `-A' command-line options
 414 #
 415 if [ "$SHOW_ALL" ]; then
 416         #
 417         # Get a list of variables that are currently set in the rc.conf(5)
 418         # files (included `/etc/defaults/rc.conf') by performing a call to
 419         # source_rc_confs() in a clean environment.
 420         #
 421         ( # Operate in a sub-shell to protect the parent environment
 422                 #
 423                 # Set which variables we want to preserve in the environment.
 424                 # Append the pipe-character (|) to the list of internal field
 425                 # separation (IFS) characters, allowing us to use the below
 426                 # list both as an extended grep (-E) pattern and argument list
 427                 # (required to first get f_clean_env() to preserve these in the
 428                 # environment and then later to prune them from the list of
 429                 # variables produced by set(1)).
 430                 #
 431                 IFS="$IFS|"
 432                 EXCEPT="IFS|EXCEPT|PATH|RC_DEFAULTS|OPTIND|DESCRIBE|SEP"
 433                 EXCEPT="$EXCEPT|DELETE|SHOW_ALL|SHOW_EQUALS|SHOW_NAME"
 434                 EXCEPT="$EXCEPT|SHOW_VALUE|SHOW_FILE|SYSRC_VERBOSE|RC_CONFS"
 435                 EXCEPT="$EXCEPT|pgm|SUCCESS|FAILURE|CHECK_ONLY"
 436                 EXCEPT="$EXCEPT|f_sysrc_desc_awk|f_sysrc_delete_awk"
 437
 438                 #
 439                 # Clean the environment (except for our required variables)
 440                 # and then source the required files.
 441                 #
 442                 f_clean_env --except $EXCEPT
 443                 if [ -f "$RC_DEFAULTS" -a -r "$RC_DEFAULTS" ]; then
 444                         . "$RC_DEFAULTS"
 445
 446                         #
 447                         # If passed `-a' (rather than `-A'), re-purge the
 448                         # environment, removing the rc.conf(5) defaults.
 449                         #
 450                         [ "$SHOW_ALL" = "1" ] \
 451                                 && f_clean_env --except rc_conf_files $EXCEPT
 452
 453                         #
 454                         # If `-f file' was passed, set $rc_conf_files to an
 455                         # explicit value, modifying the default behavior of
 456                         # source_rc_confs().
 457                         #
 458                         [ "${RC_CONFS+set}" ] && rc_conf_files="$RC_CONFS"
 459
 460                         source_rc_confs
 461
 462                         #
 463                         # If passed `-a' (rather than `-A'), remove
 464                         # `rc_conf_files' unless it was defined somewhere
 465                         # other than rc.conf(5) defaults.
 466                         #
 467                         [ "$SHOW_ALL" = "1" -a \
 468                           "$( f_sysrc_find rc_conf_files )" = "$RC_DEFAULTS" \
 469                         ] \
 470                         && unset rc_conf_files
 471                 fi
 472
 473                 for NAME in $( set |
 474                         awk -F= '/^[[:alpha:]_][[:alnum:]_]*=/ {print $1}' |
 475                         grep -Ev "^($EXCEPT)$"
 476                 ); do
 477                         #
 478                         # If enabled, describe rather than expand value
 479                         #
 480                         if [ "$DESCRIBE" ]; then
 481                                 echo "$NAME: $( f_sysrc_desc "$NAME" )"
 482                                 continue
 483                         fi
 484
 485                         #
 486                         # If `-F' is passed, find it and move on
 487                         #
 488                         if [ "$SHOW_FILE" ]; then
 489                                 [ "$SHOW_NAME" ] && echo -n "$NAME: "
 490                                 f_sysrc_find "$NAME"
 491                                 continue
 492                         fi
 493
 494                         #
 495                         # If `-X' is passed, delete the variables
 496                         #
 497                         if [ "$DELETE" = "2" ]; then
 498                                 f_sysrc_delete "$NAME"
 499                                 continue
 500                         fi
 501
 502                         [ "$SYSRC_VERBOSE" ] && \
 503                                 echo -n "$( f_sysrc_find "$NAME" ): "
 504
 505                         #
 506                         # If `-N' is passed, simplify the output
 507                         #
 508                         if [ ! "$SHOW_VALUE" ]; then
 509                                 echo "$NAME"
 510                                 continue
 511                         fi
 512
 513                         echo "${SHOW_NAME:+$NAME$SEP}$(
 514                               f_sysrc_get "$NAME" )${SHOW_EQUALS:+\"}"
 515
 516                 done
 517         )
 518
 519         #
 520         # Ignore the remainder of positional arguments.
 521         #
 522         exit $SUCCESS
 523 fi
 524
 525 #
 526 # Process command-line arguments
 527 #
 528 status=$SUCCESS
 529 while [ $# -gt 0 ]; do
 530         NAME="${1%%=*}"
 531
 532         case "$NAME" in
 533         *+) mode=APPEND NAME="${NAME%+}" ;;
 534         *-) mode=REMOVE NAME="${NAME%-}" ;;
 535          *) mode=ASSIGN
 536         esac
 537
 538         [ "$DESCRIBE" ] && \
 539                 echo "$NAME: $( f_sysrc_desc "$NAME" )"
 540
 541         case "$1" in
 542         *=*)
 543                 #
 544                 # Like sysctl(8), if both `-d' AND "name=value" is passed,
 545                 # first describe (done above), then attempt to set
 546                 #
 547
 548                 # If verbose, prefix line with where the directive lives
 549                 if [ "$SYSRC_VERBOSE" -a ! "$CHECK_ONLY" ]; then
 550                         file=$( f_sysrc_find "$NAME" )
 551                         [ "$file" = "$RC_DEFAULTS" -o ! "$file" ] && \
 552                                 file=$( f_sysrc_get 'rc_conf_files%%[$IFS]*' )
 553                         if [ "$SHOW_EQUALS" ]; then
 554                                 echo -n ": $file; "
 555                         else
 556                                 echo -n "$file: "
 557                         fi
 558                 fi
 559
 560                 #
 561                 # If `-x' or `-X' is passed, delete the variable and ignore the
 562                 # desire to set some value
 563                 #
 564                 if [ "$DELETE" ]; then
 565                         f_sysrc_delete "$NAME" || status=$FAILURE
 566                         shift 1
 567                         continue
 568                 fi
 569
 570                 #
 571                 # If `-c' is passed, simply compare and move on
 572                 #
 573                 if [ "$CHECK_ONLY" ]; then
 574                         if ! IGNORED=$( f_sysrc_get "$NAME?" ); then
 575                                 status=$FAILURE
 576                                 [ "$SYSRC_VERBOSE" ] &&
 577                                         echo "$NAME: not currently set"
 578                                 shift 1
 579                                 continue
 580                         fi
 581                         value=$( f_sysrc_get "$NAME" )
 582                         if [ "$value" != "${1#*=}" ]; then
 583                                 status=$FAILURE
 584                                 if [ "$SYSRC_VERBOSE" ]; then
 585                                         echo -n "$( f_sysrc_find "$NAME" ): "
 586                                         echo -n "$NAME: would change from "
 587                                         echo "\`$value' to \`${1#*=}'"
 588                                 fi
 589                         elif [ "$SYSRC_VERBOSE" ]; then
 590                                 echo -n "$( f_sysrc_find "$NAME" ): "
 591                                 echo "$NAME: already set to \`$value'"
 592                         fi
 593                         shift 1
 594                         continue
 595                 fi
 596
 597                 #
 598                 # Determine both `before' value and appropriate `new' value
 599                 #
 600                 case "$mode" in
 601                 APPEND)
 602                         before=$( f_sysrc_get "$NAME" )
 603                         add="${1#*=}"
 604                         delim="${add%"${add#?}"}" # first character
 605                         oldIFS="$IFS"
 606                         case "$delim" in
 607                         ""|[$IFS]|[a-zA-Z0-9]) delim=" " ;;
 608                         *) IFS="$delim"
 609                         esac
 610                         new="$before"
 611                         for a in $add; do
 612                                 [ "$a" ] || continue
 613                                 skip=
 614                                 for b in $before; do
 615                                         [ "$b" = "$a" ] && skip=1 break
 616                                 done
 617                                 [ "$skip" ] || new="$new$delim$a"
 618                         done
 619                         new="${new#"$delim"}" IFS="$oldIFS"
 620                         unset add delim oldIFS a skip b
 621                         [ "$SHOW_FILE" ] && before=$( f_sysrc_find "$NAME" )
 622                         ;;
 623                 REMOVE)
 624                         before=$( f_sysrc_get "$NAME" )
 625                         remove="${1#*=}"
 626                         delim="${remove%"${remove#?}"}" # first character
 627                         oldIFS="$IFS"
 628                         case "$delim" in
 629                         ""|[$IFS]|[a-zA-Z0-9]) delim=" " ;;
 630                         *) IFS="$delim"
 631                         esac
 632                         new=
 633                         for b in $before; do
 634                                 [ "$b" ] || continue
 635                                 add=1
 636                                 for r in $remove; do
 637                                         [ "$r" = "$b" ] && add= break
 638                                 done
 639                                 [ "$add" ] && new="$new$delim$b"
 640                         done
 641                         new="${new#"$delim"}" IFS="$oldIFS"
 642                         unset remove delim oldIFS b add r
 643                         [ "$SHOW_FILE" ] && before=$( f_sysrc_find "$NAME" )
 644                         ;;
 645                 *)
 646                         if [ "$SHOW_FILE" ]; then
 647                                 before=$( f_sysrc_find "$NAME" )
 648                         else
 649                                 before=$( f_sysrc_get "$NAME" )
 650                         fi
 651                         new="${1#*=}"
 652                 esac
 653
 654                 #
 655                 # If `-N' is passed, simplify the output
 656                 #
 657                 if [ ! "$SHOW_VALUE" ]; then
 658                         echo "$NAME"
 659                         f_sysrc_set "$NAME" "$new"
 660                 else
 661                         if f_sysrc_set "$NAME" "$new"; then
 662                                 if [ "$SHOW_FILE" ]; then
 663                                         after=$( f_sysrc_find "$NAME" )
 664                                 else
 665                                         after=$( f_sysrc_get "$NAME" )
 666                                 fi
 667                                 echo -n "${SHOW_NAME:+$NAME$SEP}"
 668                                 echo -n "$before${SHOW_EQUALS:+\" #}"
 669                                 echo -n " -> ${SHOW_EQUALS:+\"}$after"
 670                                 echo "${SHOW_EQUALS:+\"}"
 671                         fi
 672                 fi
 673                 ;;
 674         *)
 675                 if ! IGNORED=$( f_sysrc_get "$NAME?" ); then
 676                         [ "$IGNORE_UNKNOWNS" -o "$QUIET" ] ||
 677                                 echo "$pgm: unknown variable '$NAME'"
 678                         shift 1
 679                         status=$FAILURE
 680                         continue
 681                 fi
 682
 683                 # The above check told us what we needed for `-c'
 684                 if [ "$CHECK_ONLY" ]; then
 685                         shift 1
 686                         continue
 687                 fi
 688
 689                 #
 690                 # Like sysctl(8), when `-d' is passed, desribe it
 691                 # (already done above) rather than expanding it
 692                 #
 693
 694                 if [ "$DESCRIBE" ]; then
 695                         shift 1
 696                         continue
 697                 fi
 698
 699                 #
 700                 # If `-x' or `-X' is passed, delete the variable
 701                 #
 702                 if [ "$DELETE" ]; then
 703                         f_sysrc_delete "$NAME" || status=$FAILURE
 704                         shift 1
 705                         continue
 706                 fi
 707
 708                 #
 709                 # If `-F' is passed, find it and move on
 710                 #
 711                 if [ "$SHOW_FILE" ]; then
 712                         [ "$SHOW_NAME" ] && echo -n "$NAME: "
 713                         f_sysrc_find "$NAME"
 714                         shift 1
 715                         continue
 716                 fi
 717
 718                 if [ "$SYSRC_VERBOSE" ]; then
 719                         if [ "$SHOW_EQUALS" ]; then
 720                                 echo -n ": $( f_sysrc_find "$NAME" ); "
 721                         else
 722                                 echo -n "$( f_sysrc_find "$NAME" ): "
 723                         fi
 724                 fi
 725
 726                 #
 727                 # If `-N' is passed, simplify the output
 728                 #
 729                 if [ ! "$SHOW_VALUE" ]; then
 730                         echo "$NAME"
 731                 else
 732                         echo "${SHOW_NAME:+$NAME$SEP}$(
 733                               f_sysrc_get "$NAME" )${SHOW_EQUALS:+\"}"
 734                 fi
 735         esac
 736         shift 1
 737 done
 738
 739 exit $status # $SUCCESS unless error occurred with either `-c' or `-x'
 740
 741 ################################################################################
 742 # END
 743 ################################################################################