TTYs - Revision history

Kir: /* External terminal */ make it more English

2019-01-30T02:06:00Z

External terminal: make it more English

Kir: /* External terminal */

2019-01-30T01:57:41Z

External terminal

Xemul at 09:12, 21 September 2016

2016-09-21T09:12:17Z

Cyrillos: /* Supported terminal types */

2016-09-08T15:39:18Z

Supported terminal types

Cyrillos: /* Supported terminal types */

2016-09-08T15:17:17Z

Supported terminal types

Cyrillos: /* Supported terminal types */

2016-09-08T15:16:41Z

Supported terminal types

Cyrillos: /* Supported terminal types */

2016-09-08T15:16:24Z

Supported terminal types

Cyrillos: /* Console terminal */

2016-09-08T14:47:30Z

Console terminal

Cyrillos at 14:17, 8 September 2016

2016-09-08T14:17:20Z

Cyrillos: /* Supported terminal types */

2016-09-08T14:08:16Z

Supported terminal types

@@ Line 33: / Line 33: @@
 === External terminal ===
-'''external''' terminals stands for cases when file descriptors known to be changing between checkpoint/restore cycles and passed from command line options, see [[Inheriting FDs on restore]] for details. For this kind of terminals we are relying the file descriptors already opened and passed available so on restore we simply reuse them.
+'''external''' terminals stands for cases when file descriptors known to be changing between checkpoint/restore cycles and passed from command line options, see [[Inheriting FDs on restore]] for details. For this kind of terminals we are relying on the file descriptors to be already opened and passed, so on restore we simply reuse them.
 === Serial terminal ===

@@ Line 33: / Line 33: @@
 === External terminal ===
-'''external''' terminals stands for cases when file descriptors known to be changing between checkpoint/restore cycles and passed from command line options, see [[Inheriting_FDs_on_restore]] for details. For this kind of terminals we are relying the file descriptors already opened and passed available so on restore we simply reuse them.
+'''external''' terminals stands for cases when file descriptors known to be changing between checkpoint/restore cycles and passed from command line options, see [[Inheriting FDs on restore]] for details. For this kind of terminals we are relying the file descriptors already opened and passed available so on restore we simply reuse them.
 === Serial terminal ===

← Older revision		Revision as of 09:12, 21 September 2016
Line 42:		Line 42:

	'''pty''' terminals are most commonly used over all other kinds. The '''pty''' represent a pair of peers: upon <code>open(/dev/ptmx)</code> the kernel automatically create <code>/dev/pts/N</code> slave peer, where N is a numeric index of the pair opened. Thus on restore we simply need ''ptmx'' device and give process master and slave descriptors.		'''pty''' terminals are most commonly used over all other kinds. The '''pty''' represent a pair of peers: upon <code>open(/dev/ptmx)</code> the kernel automatically create <code>/dev/pts/N</code> slave peer, where N is a numeric index of the pair opened. Thus on restore we simply need ''ptmx'' device and give process master and slave descriptors.
		+
		+	== See also ==
		+	* [[External files]]

← Older revision		Revision as of 15:39, 8 September 2016
Line 26:		Line 26:

	'''current''' terminal is rather an abstraction over real terminal an application uses. Upon its opening the kernel simply provides back the reference to the real one thus the same way as for '''console''' its restore is just <code>open(/dev/tty)</code> with one exception - it must be restored last, ie after all other terminals are restored.		'''current''' terminal is rather an abstraction over real terminal an application uses. Upon its opening the kernel simply provides back the reference to the real one thus the same way as for '''console''' its restore is just <code>open(/dev/tty)</code> with one exception - it must be restored last, ie after all other terminals are restored.
		+
		+	=== Virtual terminal ===
		+
		+	'''vt''' stands for ''ttyN'' devices for which restore we simply do <code>open(/dev/ttyN)</code>, where N is a number.
		+
		+	=== External terminal ===
		+
		+	'''external''' terminals stands for cases when file descriptors known to be changing between checkpoint/restore cycles and passed from command line options, see [[Inheriting_FDs_on_restore]] for details. For this kind of terminals we are relying the file descriptors already opened and passed available so on restore we simply reuse them.
		+
		+	=== Serial terminal ===
		+
		+	'''serial''' terminals are supported for debug purpose mostly, in particular some developers pass through into virtual machine with this terminals. Its restore as simple as plain <code>open()</code> call.
		+
		+	=== Unix98 terminal ===
		+
		+	'''pty''' terminals are most commonly used over all other kinds. The '''pty''' represent a pair of peers: upon <code>open(/dev/ptmx)</code> the kernel automatically create <code>/dev/pts/N</code> slave peer, where N is a numeric index of the pair opened. Thus on restore we simply need ''ptmx'' device and give process master and slave descriptors.

@@ Line 21: / Line 21: @@
 === Console terminal ===
-'''console''' terminal is the most simple one. It represents <code>/dev/console</code> device and its restore is just literally <code>open(/dev/console)</code>.
+'''console''' terminal is the most simple one. Its restore is just literally <code>open(/dev/console)</code>.
 === Current terminal ===
 '''current''' terminal is rather an abstraction over real terminal an application uses. Upon its opening the kernel simply provides back the reference to the real one thus the same way as for '''console''' its restore is just <code>open(/dev/tty)</code> with one exception - it must be restored last, ie after all other terminals are restored.

← Older revision		Revision as of 15:16, 8 September 2016
Line 25:		Line 25:
	=== Current terminal ===		=== Current terminal ===

−	''current''' terminal is rather an abstraction over real terminal an application uses. Upon its opening the kernel simply provides back the reference to the real one thus the same way as for '''console''' its restore is just <code>open(/dev/tty)</code> with one exception - it must be restored last, ie after all other terminals are restored.	+	'''current''' terminal is rather an abstraction over real terminal an application uses. Upon its opening the kernel simply provides back the reference to the real one thus the same way as for '''console''' its restore is just <code>open(/dev/tty)</code> with one exception - it must be restored last, ie after all other terminals are restored.

← Older revision		Revision as of 15:16, 8 September 2016
Line 22:		Line 22:

	'''console''' terminal is the most simple one. It represents <code>/dev/console</code> device and its restore is just literally <code>open(/dev/console)</code>.		'''console''' terminal is the most simple one. It represents <code>/dev/console</code> device and its restore is just literally <code>open(/dev/console)</code>.
		+
		+	=== Current terminal ===
		+
		+	''current''' terminal is rather an abstraction over real terminal an application uses. Upon its opening the kernel simply provides back the reference to the real one thus the same way as for '''console''' its restore is just <code>open(/dev/tty)</code> with one exception - it must be restored last, ie after all other terminals are restored.

← Older revision		Revision as of 14:47, 8 September 2016
Line 21:		Line 21:
	=== Console terminal ===		=== Console terminal ===

−	'''console''' terminal represents <code>/dev/console</code> device and its restore is ~~simply do~~ <code>open(/dev/console)</code>.	+	'''console''' terminal is the most simple one. It represents <code>/dev/console</code> device and its restore is just literally <code>open(/dev/console)</code>.

← Older revision		Revision as of 14:17, 8 September 2016
Line 19:		Line 19:
	* unix98		* unix98

−	'''console''' terminal represents <~~mono~~>/dev/console</~~mono~~>	+	=== Console terminal ===
		+
		+	'''console''' terminal represents <code>/dev/console</code> device and its restore is simply do <code>open(/dev/console)</code>.

← Older revision		Revision as of 14:08, 8 September 2016
Line 18:		Line 18:
	* serial		* serial
	* unix98		* unix98
		+
		+	'''console''' terminal represents <mono>/dev/console</mono>