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 $copyright
 103
 104   -center <file>           center an image on the desktop
 105   -tile <file>             tile an image on the desktop
 106   -full <file>             stretch an image to fill the desktop
 107   -exec <args> <file>      specify an external command to execute
 108
 109   -post <string>           arguments to be passed to the post-command
 110   -debug                   prints commands without executing them
 111 EOF
 112
 113         # this is extremely lame, but probably more portable than grep -E
 114         bsetroot_help=$(bsetroot -help  2>&1| grep -v "^bsetroot" | grep -v "^  -help")
 115         case $bsetroot_help in
 116                 BaseDisplay*)   echo ;;
 117                 *-gradient*)    echo "$bsetroot_help"
 118         esac
 119
 120         cat <<EOF
 121   -generate <string>       generate a config file
 122   -help                    this message
 123   -version                 output version information
 124 EOF
 125         quit ${1:-0}
 126 }
 127
 128 get_apps()
 129 {
 130         for a in $img_apps; do
 131                 if check_exe_in_path $a; then
 132                         eval center_cmd=\$$a\_center_cmd
 133                         eval full_cmd=\$$a\_full_cmd
 134                         eval tile_cmd=\$$a\_tile_cmd
 135                         eval default_cmd=\$$a\_default_cmd
 136                         return 0
 137                 else
 138                         if [ "$not_found" ]; then
 139                                 not_found="$not_found $a"
 140                         else
 141                                 not_found=$a
 142                         fi
 143                 fi
 144         done
 145         return 1
 146 }
 147
 148 do_generate()
 149 {
 150         echo -e "# created by $me $version on $(date)\n#"
 151         echo -e "# seting NO_EXEC to a boolean value (eg true/false) will cause $me"
 152         echo -e "# to never modify the root window\n#"
 153         echo -e "#NO_EXEC=\n#"
 154         echo -e "# POST_COMMAND can be set to a command that will be run run every time"
 155         echo -e "# $me sets the root image\n#"
 156         echo -e "#POST_COMMAND=\n#"
 157         echo -e "# if LOG_LAST_CMD is set (boolean), bsetbg will keep a log of the last"
 158         echo -e "# two successful commands.\n#"
 159         echo -e "#LOG_LAST_CMD=\n#"
 160         echo -e "# the LOGFILE specifies the file that bsetbg uses when LOG_LAST_CMD"
 161         echo -e "# is defined. this defaults to ~/.bsetbg_last_cmd .\n#"
 162         echo -e "#LOGFILE=\n#"
 163         echo -e "# the following are default configuration values for the most popular image"
 164         echo -e "# programs. See the man page of the respective application for more info.\n"
 165
 166         [ "$*" ] && img_apps="$*"
 167
 168         for a in $img_apps; do
 169                 if check_exe_in_path $a; then
 170                         if ! bool $have_match; then
 171                                 q='\"'
 172                                 [ "$(eval echo \$$a\_center_cmd)" ] &&
 173                                 eval echo CENTER=$q\$$a\_center_cmd$q &&
 174
 175                                 [ "$(eval echo \$$a\_full_cmd)" ] &&
 176                                 eval echo FULL=$q\$$a\_full_cmd$q &&
 177
 178                                 [ "$(eval echo \$$a\_tile_cmd)" ] &&
 179                                 eval echo TILE=$q\$$a\_tile_cmd$q &&
 180
 181                                 [ "$(eval echo \$$a\_default_cmd)" ] &&
 182                                 eval echo -e DEFAULT=$q\$$a\_default_cmd$q \\\\n &&
 183
 184                                 have_match=1
 185                         else
 186                                 [ "$(eval echo \$$a\_center_cmd)" ] &&
 187                                 eval echo \\#CENTER=$q\$$a\_center_cmd$q
 188
 189                                 [ "$(eval echo \$$a\_full_cmd)" ] &&
 190                                 eval echo \\#FULL=$q\$$a\_full_cmd$q
 191
 192                                 [ "$(eval echo \$$a\_tile_cmd)" ] &&
 193                                 eval echo \\#TILE=$q\$$a\_tile_cmd$q
 194
 195                                 [ "$(eval echo \$$a\_default_cmd)" ] &&
 196                                 eval echo -e \\#DEFAULT=$q\$$a\_default_cmd$q \\\\n
 197                         fi
 198                 fi
 199         done
 200         quit 0
 201 }
 202
 203 do_bsetroot()
 204 {
 205         if check_exe_in_path bsetroot; then
 206                 read_config
 207
 208                 $debug bsetroot $* 2>/dev/null; rc=$?
 209
 210                 if [ "$rc" -gt 0 ]; then
 211                         help_msg $rc
 212                 else
 213                         log_cmd bsetroot $*; $refresh_cmd 2>/dev/null
 214                 fi
 215         else
 216                 quit 1 "couldn't find bsetroot in $PATH"
 217         fi
 218 }
 219
 220 do_standard()
 221 {
 222         [ -z "$1" ] && help_msg 1
 223
 224         bool $noconfig || read_config
 225
 226         get_img_command $1
 227         check_img_command $do_this
 228
 229         case $# in
 230                 1) file="$1" ;;
 231                 *) file="$2"
 232         esac
 233
 234         if [ -f "$file" ]; then
 235                 exec_img_command $do_this $file
 236         else
 237                 quit 1 "$file does not exist"
 238         fi
 239 }
 240
 241 do_exec()
 242 {
 243         [ "$#" -lt 3 ] && help_msg 3
 244
 245         bool $noconfig || read_config
 246
 247         # check to see if -*c, -*f, or -*t were spcified, if so
 248         # assume the last argument is a filename
 249         b_arg=$(eval echo \$$(( $# - 1 )) )
 250         app=$1
 251
 252         case $b_arg in
 253                 -c|*-center|c|-t|*-tile*|t|-f|*-full|f)
 254                         eval file=\$$#
 255                         f_args="$b_arg $file"
 256         esac
 257
 258         # put the rest of the arguments into the varialbe $e_args
 259         while [ "$*" ]; do
 260                 for a in "$*"; do
 261                         case $1 in
 262                                 $b_arg|$file) : ;;
 263                                 *) e_args="$e_args "$1""
 264                         esac
 265                         shift 1
 266                 done
 267         done
 268
 269         # with $f_args defined, check for image and do things normally
 270         if [ "$f_args" ]; then
 271                 [ ! -f "$file" ] && quit 1 "$file does not exist"
 272
 273                 if check_img_command $e_args; then
 274                         do_this="$e_args"
 275                 else
 276                         read_config
 277                         get_img_command $f_args
 278                         check_img_command $do_this
 279                         echo "$p couldn't find '$app' in path, using $type command instead"
 280                 fi
 281         # without $f_args, run the command blindly if it's in $PATH
 282         elif check_exe_in_path $e_args; then
 283                 do_this="$e_args"
 284         else
 285                 quit 1 "$p unable to run the following command: $e_args"
 286         fi
 287
 288         exec_img_command $do_this $file
 289 }
 290
 291 get_img_command()
 292 {
 293         case $1 in
 294                 *-full|-f|f)    type=full; do_this="$full_cmd" ;;
 295                 *-tile|-t|t)    type=tile; do_this="$tile_cmd" ;;
 296                 *-center|-c|c)  type=center; do_this="$center_cmd" ;;
 297                 *)              type=default; do_this="$default_cmd"
 298         esac
 299 }
 300
 301 check_img_command()
 302 {
 303         if check_exe_in_path $1; then
 304                 do_this="$*"
 305                 rc=0
 306         elif get_apps; then
 307                 get_img_command $*
 308                 rc=1
 309         else
 310                 quit 1 "$p couldn't find a suitable image program. tried the following:\\n
 311                 $(for a in $not_found; do echo "    $a\\n"; done)"
 312         fi
 313
 314         if [ "$rc" -gt 0 -a -z "$e_args" ] && bool $read_config; then
 315                 echo "$p couldn't find a suitable $type command in $config"
 316         fi
 317
 318     return $rc
 319 }
 320
 321 exec_img_command()
 322 {
 323         unset rc
 324         command=$*
 325
 326         if [ "$debug" ]; then
 327                 $debug $command
 328         else
 329                 $command >/dev/null 2>&1; rc=$?
 330         fi
 331
 332         if [ "$rc" -gt 0 ]; then
 333                 echo "$p '$command' exited with status $rc"
 334                 get_apps
 335                 noconfig=1
 336                 parse_args ${f_args:-$my_args}
 337                 echo "$p using '$command' as $type"
 338                 $debug $command >/dev/null 2>&1; rc=$?
 339                 [ "$rc" =  0 ] && log_cmd $do_this $file && $refresh_cmd 2>/dev/null
 340         else
 341                 log_cmd $do_this $file; xrefresh 2>/dev/null
 342         fi
 343         return $rc
 344 }
 345
 346 log_cmd()
 347 {
 348         bool $LOG_LAST_CMD || return 1
 349         [ "$debug" ] && return 1
 350         echo -e "$prev_cmd\n$*" >$last_cmd_file
 351         return $?
 352 }
 353
 354 read_config()
 355 {
 356         [ -f $config ] || return 1
 357
 358         if bool $read_config; then
 359                 unset read_config
 360         else
 361                 read_config=1
 362         fi
 363
 364         . $HOME/.bsetbgrc 2>/dev/null
 365         check_no_exec
 366
 367         full_cmd=$FULL
 368         center_cmd=$CENTER
 369         tile_cmd=$TILE
 370         default_cmd=$CENTER
 371         last_cmd_file=${LOGFILE:-$last_cmd_file}
 372
 373         bool $LOG_LAST_CMD && prev_cmd=$(tail -n 1 $last_cmd_file 2>/dev/null)
 374 }
 375
 376 check_no_exec()
 377 {
 378         bool $NO_EXEC &&
 379         quit 0 "$p no_exec mode. the root window will not be modified."
 380 }
 381
 382 post_command()
 383 {
 384         if [ -n "$POST_COMMAND" -a "$rc" -le 0 ]; then
 385                 if [ -n "$debug" ]; then
 386                         $debug "running post_command: $POST_COMMAND $post_args"
 387                 else
 388                         post_command_output=$($POST_COMMAND $post_args 2>&1); erc=$?
 389                         if [ "$erc" -gt 0 ]; then
 390                                 echo "$p post-command '$POST_COMMAND $post_args' exited with status $erc"
 391                                 [ -n "$post_command_output" ] &&
 392                                         echo "$POST_COMMAND $post_args: $post_command_output"
 393                         fi
 394                 fi
 395         fi
 396 }
 397
 398 add_arg()
 399 {
 400         [ "$1" ] || return 1
 401         if [ "$args" ]; then
 402                 args="$args $1"
 403         else
 404                 args=$1
 405         fi
 406 }
 407
 408 add_post_arg()
 409 {
 410         [ -z "$1" ] && return 1
 411         if [ "$post_args" ]; then
 412                 post_args="$post_args $1"
 413         else
 414                 post_args=$1
 415         fi
 416 }
 417
 418 check_cmd()
 419 {
 420         if [ -z "$command" ]; then
 421                 command=${2:-$1}; eval ${3:-${2:-$1}}=1
 422         elif bool $do_post; then
 423                 add_post_arg ${1}
 424         else
 425                 finished=1
 426         fi
 427 }
 428
 429 parse_args()
 430 {
 431         case $1 in
 432                 -d|*-debug|d)
 433                         unset refresh_cmd; debug=echo\ $me\_debug: ;;
 434
 435                 -p|-*-post|p)
 436                         unset finished do_standard do_exec; do_post=1 ;;
 437
 438                 -c|*-center|c|-t|*-tile*|t|-f|*-full|f)
 439                         case $command in
 440                                 do_standard|do_generate|do_bsetroot)
 441                                         finished=1 ;;
 442                                 do_exec)
 443                                         if ! bool $got_fcmd; then
 444                                                 add_arg $1 args; got_fcmd=1
 445                                         else
 446                                                 finished=1
 447                                         fi ;;
 448                                 *)
 449                                         add_arg $1; do_standard=1; command=do_standard
 450                         esac ;;
 451
 452                 -a|*-app|a|-e|*-exec|e)
 453                         check_cmd "do_exec" ;;
 454
 455                 -mod|-gradient|-solid|-display)
 456                         check_cmd "do_bsetroot" && add_arg $1 ;;
 457
 458                 -g|*-generate*|g)
 459                         check_cmd $1 "do_generate" ;;
 460
 461                 -v|*-version|v)
 462                         [ -z "$command" ] && quit 0 $me $version $copyright ;;
 463
 464                 -h|*-help|h)
 465                         [ -z "$command" ] && help_msg ;;
 466
 467                 *)
 468                         bool $finished && return 1
 469
 470                         case $1 in -*)
 471                                 bool $do_exec || bool $do_bsetroot || bool $do_post || help_msg 1
 472                         esac
 473
 474                         if bool $do_standard || bool $do_exec || bool $do_bsetroot || bool $do_generate; then
 475                                 add_arg $1
 476                         elif bool $do_post; then
 477                                 add_post_arg $1
 478                         else
 479                                 add_arg $1; command=do_standard; finished=1
 480                         fi
 481         esac
 482 }
 483
 484 [ -z "$*" ] && help_msg 1
 485
 486 my_args=$*
 487
 488 for arg in "$@"; do
 489         parse_args "$arg"
 490         shift 1
 491 done
 492
 493 [ "$debug" ] && echo
 494
 495 $command $args
 496 post_command $rc
 497
 498 quit $rc