util/bsetbg

   1 #!/bin/sh
   2
   3 # Copyright (c) 2000-2002 Timothy M. King (tmk@lordzork.com)
   4 #
   5 # Permission is hereby granted, free of charge, to any person obtaining a
   6 # copy of this software and associated documentation files (the "Software"),
   7 # to deal in the Software without restriction, including without limitation
   8 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 # and/or sell copies of the Software, and to permit persons to whom the
  10 # Software is furnished to do so, subject to the following conditions:
  11 #
  12 # The above copyright notice and this permission notice shall be included in
  13 # all copies or substantial portions of the Software.
  14 #
  15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18 # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20 # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21 # DEALINGS IN THE SOFTWARE.
  22
  23 PATH=$PATH:/usr/bin:/usr/local/bin:/usr/X11R6/bin
  24
  25 img_apps="display xli xsetbg Esetroot qiv wmsetbg xv"
  26
  27 display_full_cmd="display -geometry 800x600 -window root"
  28 display_tile_cmd="display -window root"
  29 display_center_cmd="display -backdrop -window root"
  30 display_default_cmd="$display_center_cmd"
  31
  32 Esetroot_full_cmd="Esetroot -scale"
  33 Esetroot_tile_cmd="Esetroot"
  34 Esetroot_center_cmd="Esetroot -c"
  35 Esetroot_default_cmd="$Esetroot_center_cmd"
  36
  37 wmsetbg_full_cmd="wmsetbg -s -S"
  38 wmsetbg_tile_cmd="wmsetbg -t"
  39 wmsetbg_center_cmd="wmsetbg -e"
  40 wmsetbg_default_cmd="$wmsetbg_center_cmd"
  41
  42 qiv_full_cmd="qiv --root_s"
  43 qiv_tile_cmd="qiv --root_t"
  44 qiv_center_cmd="qiv --root"
  45 qiv_default_cmd="$qiv_center_cmd"
  46
  47 xv_full_cmd="xv -max -smooth -root -quit"
  48 xv_tile_cmd="xv -root -quit"
  49 xv_center_cmd="xv -rmode 5 -root -quit"
  50 xv_default_cmd="$xv_center_cmd"
  51
  52 xli_full_cmd="xli -fullscreen -onroot -quiet"
  53 xli_tile_cmd="xli -onroot -quiet"
  54 xli_center_cmd="xli -center -onroot quiet"
  55 xli_default_cmd="$xli_center_cmd"
  56
  57 xsetbg_full_cmd="xsetbg -fullscreen"
  58 xsetbg_tile_cmd="xsetbg"
  59 xsetbg_center_cmd="xsetbg -center"
  60 xsetbg_default_cmd="$xsetbg_center_cmd"
  61
  62 ##################################
  63
  64 me=${0##*/}
  65 version=2.1
  66 copyright="(c) 2000-$(date +%Y) by Timothy M. King (http://lordzork.com/)"
  67 config=$HOME/.bsetbgrc
  68 last_cmd_file=$HOME/.bsetbg_last_cmd
  69 refresh_cmd=xrefresh
  70 p=$me:
  71
  72 quit()
  73 {
  74         [ "$1" ] && rc=$1 && shift 1
  75         [ "$*" ] && echo -e $*
  76         exit ${rc:-0}
  77 }
  78
  79 bool() {
  80         case $1 in
  81                 [yY][eE][sS]|1|[yY]|[tT][rR][uU][eE]|[oO][nN]) : ;;
  82                 *) return 1 ;;
  83         esac
  84 }
  85
  86 check_exe_in_path()
  87 {
  88         if [ -z "$1" ]; then
  89                 return 1
  90         elif [ -x "$(which $1 2>/dev/null)" ]; then
  91                 return 0
  92         elif [ -x "$(type $1 2>/dev/null)" ]; then
  93                 return 0
  94         else
  95                 return 1
  96         fi
  97 }
  98
  99 help_msg()
 100 {
 101         cat <<EOF
 102 $me $version $copyright
 103
 104   -center <file>           center an image on the desktop
 105   -tile <file>             tile an image on the desktop
 106   -full <file>             stretch an image to fill the desktop
 107   -exec <args> <file>      specify an external command to execute
 108
 109   -app  <app>              specify the image application to use
 110   -post <string>           arguments to be passed to the post-command
 111   -debug                   prints commands without executing them
 112 EOF
 113
 114         # this is extremely lame, but probably more portable than grep -E
 115         bsetroot_help=$(bsetroot -help  2>&1| grep -v "^bsetroot" | grep -v "^  -help")
 116         case $bsetroot_help in
 117                 BaseDisplay*)   echo ;;
 118                 *-gradient*)    echo "$bsetroot_help"
 119         esac
 120
 121         cat <<EOF
 122   -generate <string>       generate a config file
 123   -help                    this message
 124   -version                 output version information
 125 EOF
 126         quit ${1:-0}
 127 }
 128
 129 get_apps()
 130 {
 131         for a in $img_apps; do
 132                 if check_exe_in_path $a; then
 133                         eval center_cmd=\$$a\_center_cmd
 134                         eval full_cmd=\$$a\_full_cmd
 135                         eval tile_cmd=\$$a\_tile_cmd
 136                         eval default_cmd=\$$a\_default_cmd
 137                         return 0
 138                 else
 139                         if [ "$not_found" ]; then
 140                                 not_found="$not_found $a"
 141                         else
 142                                 not_found=$a
 143                         fi
 144                 fi
 145         done
 146         return 1
 147 }
 148
 149 do_generate()
 150 {
 151         echo -e "# created by $me $version on $(date)\n#"
 152         echo -e "# seting NO_EXEC to a boolean value (eg true/false) will cause $me"
 153         echo -e "# to never modify the root window\n#"
 154         echo -e "#NO_EXEC=\n#"
 155         echo -e "# POST_COMMAND can be set to a command that will be run run every time"
 156         echo -e "# $me sets the root image\n#"
 157         echo -e "#POST_COMMAND=\n#"
 158         echo -e "# if LOG_LAST_CMD is set (boolean), bsetbg will keep a log of the last"
 159         echo -e "# two successful commands.\n#"
 160         echo -e "#LOG_LAST_CMD=\n#"
 161         echo -e "# the LOGFILE specifies the file that bsetbg uses when LOG_LAST_CMD"
 162         echo -e "# is defined. this defaults to ~/.bsetbg_last_cmd .\n#"
 163         echo -e "#LOGFILE=\n#"
 164         echo -e "# the following are default configuration values for the most popular image"
 165         echo -e "# programs. See the man page of the respective application for more info.\n"
 166
 167         [ "$*" ] && img_apps="$*"
 168
 169         for a in $img_apps; do
 170                 if check_exe_in_path $a; then
 171                         if ! bool $have_match; then
 172                                 q='\"'
 173                                 [ "$(eval echo \$$a\_center_cmd)" ] &&
 174                                 eval echo CENTER=$q\$$a\_center_cmd$q &&
 175
 176                                 [ "$(eval echo \$$a\_full_cmd)" ] &&
 177                                 eval echo FULL=$q\$$a\_full_cmd$q &&
 178
 179                                 [ "$(eval echo \$$a\_tile_cmd)" ] &&
 180                                 eval echo TILE=$q\$$a\_tile_cmd$q &&
 181
 182                                 [ "$(eval echo \$$a\_default_cmd)" ] &&
 183                                 eval echo -e DEFAULT=$q\$$a\_default_cmd$q \\\\n &&
 184
 185                                 have_match=1
 186                         else
 187                                 [ "$(eval echo \$$a\_center_cmd)" ] &&
 188                                 eval echo \\#CENTER=$q\$$a\_center_cmd$q
 189
 190                                 [ "$(eval echo \$$a\_full_cmd)" ] &&
 191                                 eval echo \\#FULL=$q\$$a\_full_cmd$q
 192
 193                                 [ "$(eval echo \$$a\_tile_cmd)" ] &&
 194                                 eval echo \\#TILE=$q\$$a\_tile_cmd$q
 195
 196                                 [ "$(eval echo \$$a\_default_cmd)" ] &&
 197                                 eval echo -e \\#DEFAULT=$q\$$a\_default_cmd$q \\\\n
 198                         fi
 199                 fi
 200         done
 201         quit 0
 202 }
 203
 204 do_bsetroot()
 205 {
 206         if check_exe_in_path bsetroot; then
 207                 read_config
 208
 209                 $debug bsetroot $* 2>/dev/null; rc=$?
 210
 211                 if [ "$rc" -gt 0 ]; then
 212                         help_msg $rc
 213                 else
 214                         log_cmd bsetroot $*; $refresh_cmd 2>/dev/null
 215                 fi
 216         else
 217                 quit 1 "couldn't find bsetroot in $PATH"
 218         fi
 219 }
 220
 221 do_standard()
 222 {
 223         [ -z "$1" ] && help_msg 1
 224
 225         bool $noconfig || read_config
 226
 227         get_img_command $1
 228         check_img_command $do_this
 229
 230         case $# in
 231                 1) file="$1" ;;
 232                 *) file="$2"
 233         esac
 234
 235         if [ -f "$file" ]; then
 236                 exec_img_command $do_this $file
 237         else
 238                 quit 1 "$file does not exist"
 239         fi
 240 }
 241
 242 do_exec()
 243 {
 244         [ "$#" -lt 3 ] && help_msg 3
 245
 246         bool $noconfig || read_config
 247
 248         # check to see if -*c, -*f, or -*t were spcified, if so
 249         # assume the last argument is a filename
 250         b_arg=$(eval echo \$$(( $# - 1 )) )
 251         app=$1
 252
 253         case $b_arg in
 254                 -c|*-center|c|-t|*-tile*|t|-f|*-full|f)
 255                         eval file=\$$#
 256                         f_args="$b_arg $file"
 257         esac
 258
 259         # put the rest of the arguments into the varialbe $e_args
 260         while [ "$*" ]; do
 261                 for a in "$*"; do
 262                         case $1 in
 263                                 $b_arg|$file) : ;;
 264                                 *) e_args="$e_args "$1""
 265                         esac
 266                         shift 1
 267                 done
 268         done
 269
 270         # with $f_args defined, check for image and do things normally
 271         if [ "$f_args" ]; then
 272                 [ ! -f "$file" ] && quit 1 "$file does not exist"
 273
 274                 if check_img_command $e_args; then
 275                         do_this="$e_args"
 276                 else
 277                         read_config
 278                         get_img_command $f_args
 279                         check_img_command $do_this
 280                         echo "$p couldn't find '$app' in path, using $type command instead"
 281                 fi
 282         # without $f_args, run the command blindly if it's in $PATH
 283         elif check_exe_in_path $e_args; then
 284                 do_this="$e_args"
 285         else
 286                 quit 1 "$p unable to run the following command: $e_args"
 287         fi
 288
 289         exec_img_command $do_this $file
 290 }
 291
 292 get_img_command()
 293 {
 294         case $1 in
 295                 *-full|-f|f)    type=full; do_this="$full_cmd" ;;
 296                 *-tile|-t|t)    type=tile; do_this="$tile_cmd" ;;
 297                 *-center|-c|c)  type=center; do_this="$center_cmd" ;;
 298                 *)              type=default; do_this="$default_cmd"
 299         esac
 300 }
 301
 302 check_img_command()
 303 {
 304         if check_exe_in_path $1; then
 305                 do_this="$*"
 306                 rc=0
 307         elif get_apps; then
 308                 get_img_command $*
 309                 rc=1
 310         else
 311                 quit 1 "$p couldn't find a suitable image program. tried the following:\\n
 312                 $(for a in $not_found; do echo "    $a\\n"; done)"
 313         fi
 314
 315         if [ "$rc" -gt 0 -a -z "$e_args" ] && bool $read_config; then
 316                 echo "$p couldn't find a suitable $type command in $config"
 317         fi
 318
 319     return $rc
 320 }
 321
 322 exec_img_command()
 323 {
 324         unset rc
 325         command=$*
 326
 327         if [ "$debug" ]; then
 328                 $debug $command
 329         else
 330                 $command >/dev/null 2>&1; rc=$?
 331         fi
 332
 333         if [ "$rc" -gt 0 ]; then
 334                 echo "$p '$command' exited with status $rc"
 335                 get_apps
 336                 noconfig=1
 337                 parse_args ${f_args:-$my_args}
 338                 echo "$p using '$command' as $type"
 339                 $debug $command >/dev/null 2>&1; rc=$?
 340                 [ "$rc" =  0 ] && log_cmd $do_this $file && $refresh_cmd 2>/dev/null
 341         else
 342                 log_cmd $do_this $file; xrefresh 2>/dev/null
 343         fi
 344         return $rc
 345 }
 346
 347 log_cmd()
 348 {
 349         bool $LOG_LAST_CMD || return 1
 350         [ "$debug" ] && return 1
 351         echo -e "$prev_cmd\n$*" >$last_cmd_file
 352         return $?
 353 }
 354
 355 read_config()
 356 {
 357         [ -f $config ] || return 1
 358
 359         if bool $read_config; then
 360                 unset read_config
 361         else
 362                 read_config=1
 363         fi
 364
 365         . $HOME/.bsetbgrc 2>/dev/null
 366         check_no_exec
 367
 368         full_cmd=$FULL
 369         center_cmd=$CENTER
 370         tile_cmd=$TILE
 371         default_cmd=$CENTER
 372         last_cmd_file=${LOGFILE:-$last_cmd_file}
 373
 374         bool $LOG_LAST_CMD && prev_cmd=$(tail -n 1 $last_cmd_file 2>/dev/null)
 375 }
 376
 377 check_no_exec()
 378 {
 379         bool $NO_EXEC &&
 380         quit 0 "$p no_exec mode. the root window will not be modified."
 381 }
 382
 383 post_command()
 384 {
 385         if [ -n "$POST_COMMAND" -a "$rc" -le 0 ]; then
 386                 if [ -n "$debug" ]; then
 387                         $debug "running post_command: $POST_COMMAND $post_args"
 388                 else
 389                         post_command_output=$($POST_COMMAND $post_args 2>&1); erc=$?
 390                         if [ "$erc" -gt 0 ]; then
 391                                 echo "$p post-command '$POST_COMMAND $post_args' exited with status $erc"
 392                                 [ -n "$post_command_output" ] &&
 393                                         echo "$POST_COMMAND $post_args: $post_command_output"
 394                         fi
 395                 fi
 396         fi
 397 }
 398
 399 add_arg()
 400 {
 401         [ "$1" ] || return 1
 402         if [ "$args" ]; then
 403                 args="$args $1"
 404         else
 405                 args=$1
 406         fi
 407 }
 408
 409 add_post_arg()
 410 {
 411         [ -z "$1" ] && return 1
 412         if [ "$post_args" ]; then
 413                 post_args="$post_args $1"
 414         else
 415                 post_args=$1
 416         fi
 417 }
 418
 419 check_cmd()
 420 {
 421         if [ -z "$command" ]; then
 422                 command=${2:-$1}; eval ${3:-${2:-$1}}=1
 423         elif bool $do_post; then
 424                 add_post_arg ${1}
 425         else
 426                 finished=1
 427         fi
 428 }
 429
 430 parse_args()
 431 {
 432         case $1 in
 433                 -d|*-debug|d)
 434                         unset refresh_cmd; debug=echo\ $me\_debug: ;;
 435
 436                 -p|-*-post|p)
 437                         unset finished do_standard do_exec; do_post=1 ;;
 438
 439                 -c|*-center|c|-t|*-tile*|t|-f|*-full|f)
 440                         case $command in
 441                                 do_standard|do_generate|do_bsetroot)
 442                                         finished=1 ;;
 443                                 do_exec)
 444                                         if ! bool $got_fcmd; then
 445                                                 add_arg $1 args; got_fcmd=1
 446                                         else
 447                                                 finished=1
 448                                         fi ;;
 449                                 *)
 450                                         add_arg $1; do_standard=1; command=do_standard
 451                         esac ;;
 452
 453                 -a|*-app|a|-e|*-exec|e)
 454                         check_cmd "do_exec" ;;
 455
 456                 -mod|-gradient|-solid|-display)
 457                         check_cmd "do_bsetroot" && add_arg $1 ;;
 458
 459                 -g|*-generate*|g)
 460                         check_cmd $1 "do_generate" ;;
 461
 462                 -v|*-version|v)
 463                         [ -z "$command" ] && quit 0 $me $version $copyright ;;
 464
 465                 -h|*-help|h)
 466                         [ -z "$command" ] && help_msg ;;
 467
 468                 *)
 469                         bool $finished && return 1
 470
 471                         case $1 in -*)
 472                                 bool $do_exec || bool $do_bsetroot || bool $do_post || help_msg 1
 473                         esac
 474
 475                         if bool $do_standard || bool $do_exec || bool $do_bsetroot || bool $do_generate; then
 476                                 add_arg $1
 477                         elif bool $do_post; then
 478                                 add_post_arg $1
 479                         else
 480                                 add_arg $1; command=do_standard; finished=1
 481                         fi
 482         esac
 483 }
 484
 485 [ -z "$*" ] && help_msg 1
 486
 487 my_args=$*
 488
 489 for arg in "$@"; do
 490         parse_args "$arg"
 491         shift 1
 492 done
 493
 494 [ "$debug" ] && echo
 495
 496 $command $args
 497 post_command $rc
 498
 499 quit $rc