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32 .Nd stream data from stdin or multiple paths with dialog progress view
58 provides a dialog progress view, allowing a user to see current throughput rate
59 and total data transferred for one or more streams.
63 utility has two main modes for processing input.
65 The default input mode, without
68 reads bytes from standard input.
69 A label for the data must be provided.
71 The secondary input mode, with
75 .Pq up to 2047 or Dq ARG_MAX/2-1 ,
78 Data read in either mode is either thrown away
80 sent to a spawned instance of the program specified via
82 or sent to a unique file specified by
87 progress is displayed using one of
96 The following options are available:
97 .Bl -tag -width "-b backtitle"
101 below the file progress indicator(s).
102 .It Fl b Ar backtitle
105 on the backdrop, at top-left, behind the dialog widget.
108 this is displayed inside the window
110 followed by a separator line.
112 Do not use the default interface of
114 but instead spawn an instance of
120 environment variable or simply
125 Print dialog prompt data to standard out and provide additional debugging on
128 Produce a short syntax usage with brief option descriptions and exit.
129 Output is produced on standard error.
131 Customize the multi-file format string used to update the status line.
132 Ignored when using either
136 which lack the ability to display the status line
137 .Pq containing bytes/rate/thread information .
140 .Dq Li %'10lli bytes read @ %'9.1f bytes/sec. [%i/%i busy/wait] .
141 This format is used when handling more than one file.
143 Customize the single-file format string used to update the status line.
144 Ignored when using either
148 which lack the ability to display the status line
149 .Pq containing bytes/rate/thread information .
152 .Dq Li %'10lli bytes read @ %'9.1f bytes/sec. .
153 This format is used when handling one file.
156 Prevent visually distracting initialization/exit routines for scripts running
161 If negative, shrink to longest label width.
164 Read lines from input instead of bytes.
167 Instead of reading bytes from standard input, read from a set of paths
168 .Pq one for each label .
169 By default, each path is processed sequentially in the order given.
172 If enabled, stop reading known-length inputs when input reaches stated length.
176 progress indicators per screen.
177 If zero, display as many as possible.
178 If negative, only display the main progress indicator.
184 The first occurrence of
189 will be replaced with the
193 Mini-progressbar size.
194 If negative, don't display mini-progressbars
195 .Pq only the large overall progress indicator is shown .
196 If zero, auto-adjust based on number of files to read.
197 When zero and only one file to read, defaults to -1.
198 When zero and more than one file to read, defaults to 17.
202 above the file progress indicator(s).
205 Simulate reading a number of bytes, divided evenly across the number of files,
206 while stepping through each percent value of each file to process.
210 .Pq to override, use Ql Fl u Ar format .
211 No data is actually read.
216 Note that if you use this option at the same time as
219 .Ql Fl b Ar backtitle ,
224 are effectively switched
225 .Pq see BUGS section below .
234 disables status line updates.
235 If negative, update the status line as fast as possible.
236 Ignored when using either
240 which lack the ability to display the status line
241 .Pq containing bytes/rate/thread information .
250 to bump the dialog width.
251 Prompts wider than the maximum width will wrap
252 .Pq unless using Xr Xdialog 1 ; see BUGS section below .
254 Enable X11 mode by using
264 and send it data that has been read.
271 is executed once for each
274 The first occurrence of
279 will be replaced with the
284 The following environment variables are referenced by
286 .Bl -tag -width ".Ev USE_COLOR"
288 Override command string used to launch
293 .Pq requires Ql Fl X ;
301 If set and non-NULL, path to
307 is either not set or NULL, used as a prefix to
309 .Pq i.e., Ql $HOME/.dialogrc .
311 If set and NULL, disables the use of color when using
313 .Pq does not apply to Xr Xdialog 1 .
326 .Bl -tag -width "$HOME/.dialogrc" -compact
327 .It Pa $HOME/.dialogrc
330 Simple example to show how fast
333 .Pq usually about ten-million per-second; your results may vary :
334 .Bd -literal -offset indent
338 Display progress while timing how long it takes
340 to produce a half-billion lines
341 .Pq usually under one minute; your results may vary :
342 .Bd -literal -offset indent
343 time yes | dpv -Nl 500000000:yes
346 An example to watch how quickly a file is transferred using
348 .Bd -literal -offset indent
349 dpv -x "nc -w 1 somewhere.com 3000" -m label file
352 A similar example, transferring a file from another process and passing the
355 .Bd -literal -offset indent
356 cat file | dpv -x "nc -w 1 somewhere.com 3000" 12345:label
359 A more complicated example:
360 .Bd -literal -offset indent
361 tar cf - . | dpv -x "gzip -9 > out.tgz" \\
362 $( du -s . | awk '{print $1 * 1024}' ):label
365 Taking an image of a disk:
366 .Bd -literal -offset indent
367 dpv -o disk-image.img -m label /dev/ada0
370 Writing an image back to a disk:
371 .Bd -literal -offset indent
372 dpv -o /dev/ada0 -m label disk-image.img
376 .Bd -literal -offset indent
377 dpv -o /dev/md42 "Zeroing md42" < /dev/zero
387 utility first appeared in
390 .An Devin Teske Aq dteske@FreeBSD.org
394 .Ql Fl -title Ar title
395 .Pq see above Ql Fl t Ar title
397 .Ql Fl -backtitle Ar backtitle
398 .Pq see above Ql Fl b Ar backtitle ,
399 displays the backtitle in place of the title and vice-versa.
402 does not wrap long prompt texts received after initial launch.
403 This is a known issue with the
409 does not display the first character after a series of escaped escape-sequences
410 (e.g., ``\\\\n'' produces ``\\'' instead of ``\\n'').
411 This is a known issue with
418 If your application ignores
420 when set and NULL before calling
422 with color escape sequences anyway,
426 may not render properly.
427 Workaround is to detect when
429 is set and NULL and either not use color escape sequences at that time or use
437 forcing interpretation of color sequences.
440 which renders the color escape sequences as plain text.
443 embedded "\\Z" sequences
447 for additional information.