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PhabricatorFilesManagementCatWorkflow.php
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PhabricatorFilesManagementCatWorkflow.php
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<?php
final
class
PhabricatorFilesManagementCatWorkflow
extends
PhabricatorFilesManagementWorkflow
{
protected
function
didConstruct
(
)
{
$this
->
setName
(
'cat'
)
->
setSynopsis
(
pht
(
'Print the contents of a file.'
)
)
->
setArguments
(
array
(
array
(
'name'
=>
'begin'
,
'param'
=>
'bytes'
,
'help'
=>
pht
(
'Begin printing at a specific offset.'
)
,
)
,
array
(
'name'
=>
'end'
,
'param'
=>
'bytes'
,
'help'
=>
pht
(
'End printing at a specific offset.'
)
,
)
,
array
(
'name'
=>
'salvage'
,
'help'
=>
pht
(
'DANGEROUS. Attempt to salvage file content even if the '
.
'integrity check fails. If an adversary has tampered with '
.
'the file, the content may be unsafe.'
)
,
)
,
array
(
'name'
=>
'names'
,
'wildcard'
=>
true
,
)
,
)
)
;
}
public
function
execute
(
PhutilArgumentParser
$args
)
{
$console
=
PhutilConsole
::
getConsole
(
)
;
$names
=
$args
->
getArg
(
'names'
)
;
if
(
count
(
$names
)
>
1
)
{
throw
new
PhutilArgumentUsageException
(
pht
(
'Specify exactly one file to print, like "%s".'
,
'F123'
)
)
;
}
else
if
(
!
$names
)
{
throw
new
PhutilArgumentUsageException
(
pht
(
'Specify a file to print, like "%s".'
,
'F123'
)
)
;
}
$file
=
head
(
$this
->
loadFilesWithNames
(
$names
)
)
;
$begin
=
$args
->
getArg
(
'begin'
)
;
$end
=
$args
->
getArg
(
'end'
)
;
$file
->
makeEphemeral
(
)
;
// If we're running in "salvage" mode, wipe out any integrity hash which
// may be present. This makes us read file data without performing an
// integrity check.
$salvage
=
$args
->
getArg
(
'salvage'
)
;
if
(
$salvage
)
{
$file
->
setIntegrityHash
(
null
)
;
}
try
{
$iterator
=
$file
->
getFileDataIterator
(
$begin
,
$end
)
;
foreach
(
$iterator
as
$data
)
{
echo
$data
;
}
}
catch
(
PhabricatorFileIntegrityException
$ex
)
{
throw
new
PhutilArgumentUsageException
(
pht
(
'File data integrity check failed. Use "--salvage" to bypass '
.
'integrity checks. This flag is dangerous, use it at your own '
.
'risk. Underlying error: %s'
,
$ex
->
getMessage
(
)
)
)
;
}
return
0
;
}
}
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