PJL - Revision history

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Admin: Created page with "The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ ..."

2017-01-08T15:35:03Z

Created page with "The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>..."

New page

The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997 p. 1-2</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:

@PJL SET PAPER=A4
@PJL SET COPIES=10
@PJL ENTER LANGUAGE=POSTSCRIPT

PJL can be used for various attacks such as [[denial of service]], manipulating hardware [[Accounting bypass#Hardware_page_counters|page counters]], gaining access to the printer's [[Memory access|memory]] and [[File system access|file system]] as well as malicious [[firmware updates]].

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← Older revision		Revision as of 09:53, 6 June 2017
Line 1:		Line 1:
−	[[File:PJL-display.png\|thumb\|Classic prank: PJL ~~display~~ ‘HACKED’]]	+	[[File:PJL-display.png\|thumb\|Classic prank: PJL displays ‘HACKED’]]

	The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997, p. 1</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:		The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997, p. 1</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:

← Older revision		Revision as of 21:44, 5 June 2017
Line 1:		Line 1:
−	[[File:PJL-display.png\|thumb\|Classic prank: PJL display ~~‘hacks’~~]]	+	[[File:PJL-display.png\|thumb\|Classic prank: PJL display ‘HACKED’]]

	The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997, p. 1</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:		The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997, p. 1</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:

@@ Line 9: / Line 9: @@
 PJL can be used for various attacks such as [[denial of service]], manipulating hardware [[Accounting bypass#Hardware_page_counters|page counters]], gaining access to the printer's [[Memory access|memory]] and [[File system access|file system]] as well as malicious [[firmware updates]].
-→ ''Related aricles:'' [[Fundamentals#Printer Control Languages|Printer Control Languages]], [[Denial of service]], [[Accounting bypass]], [[Memory access]], [[File system access]]
+→ ''Related articles:'' [[Fundamentals#Printer Control Languages|Printer Control Languages]], [[Denial of service]], [[Accounting bypass]], [[Memory access]], [[File system access]]
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@@ Line 1: / Line 1: @@
 [[File:PJL-display.png|thumb|Classic prank: PJL display ‘hacks’]]
-The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997, p. 1-2</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:
+The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997, p. 1</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:
   @PJL SET PAPER=A4

← Older revision		Revision as of 18:44, 23 January 2017
Line 1:		Line 1:
		+	[[File:PJL-display.png\|thumb\|Classic prank: PJL display ‘hacks’]]
		+
	The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997, p. 1-2</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:		The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997, p. 1-2</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:

← Older revision		Revision as of 17:15, 14 January 2017
Line 1:		Line 1:
−	The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997 p. 1-2</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:	+	The Printer Job Language (PJL) was originally introduced by HP but soon became a de facto standard for print job control. ‘PJL resides above other printer languages’ <ref>''[http://h10032.www1.hp.com/ctg/Manual/bpl13208.pdf Printer Job Language Technical Reference Manual]'', HP Inc., 1997, p. 1-2</ref> and can be used to change settings like paper tray or size. It must however be pointed out that PJL is not limited to the current print job as some settings can be made permanent. PJL can also be used to change the printer's display or read/write files on the device. There are many dialects as vendors tend to support only a subset of the commands listed in the PJL reference and instead prefer to add proprietary ones. PJL is further used to set the file format of the actual print data to follow. Without such explicit language switching, the printer has to identify the page description language based on magic numbers. Typical PJL commands to set the paper size and the number of copies before switching the interpreter to PostScript mode are shown below:

	@PJL SET PAPER=A4		@PJL SET PAPER=A4

← Older revision		Revision as of 18:37, 8 January 2017
Line 6:		Line 6:

	PJL can be used for various attacks such as [[denial of service]], manipulating hardware [[Accounting bypass#Hardware_page_counters\|page counters]], gaining access to the printer's [[Memory access\|memory]] and [[File system access\|file system]] as well as malicious [[firmware updates]].		PJL can be used for various attacks such as [[denial of service]], manipulating hardware [[Accounting bypass#Hardware_page_counters\|page counters]], gaining access to the printer's [[Memory access\|memory]] and [[File system access\|file system]] as well as malicious [[firmware updates]].
		+
		+	→ ''Related aricles:'' [[Denial of service]], [[Accounting bypass]], [[Memory access]], [[File system access]]


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