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Comment:Minor editorial corrections to 431 formatting
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SHA3-256: a4a3ebcbb39a98a2b02dc95572fbacaeae33d7ba5a0439bf26bdbbd5c29afd2f
User & Date: dkf 2018-05-27 11:33:15.545
Context
2018-05-28
08:36
tip454(resize frame on last child remove): withdrawn due to critical incompatibility. Should be restarted with alternate solution or in Tk 9.0 check-in: 660df61ab3 user: oehhar tags: trunk
2018-05-27
11:33
Minor editorial corrections to 431 formatting check-in: a4a3ebcbb3 user: dkf tags: trunk
10:50
Fix markdown formatting issue check-in: 230d2e87e1 user: dkf tags: minor change, trunk
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# TIP 431: Add 'tempdir' Subcommand to 'file'
	Author:		Kevin Pasko <[email protected]>
	State:		Draft
	Type:		Project
	Tcl-Version:	8.6.4
	Vote:		Pending
	Created:		10-Sep-2014
	Keywords:	Tcl, directory, file
	Post-History:
-----

# Abstract

This TIP proposes adding a new **tempdir** subcommand to the **file**







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# TIP 431: Add 'tempdir' Subcommand to 'file'
	Author:		Kevin Pasko <[email protected]>
	State:		Draft
	Type:		Project
	Tcl-Version:	8.6.4
	Vote:		Pending
	Created:	10-Sep-2014
	Keywords:	Tcl, directory, file
	Post-History:
-----

# Abstract

This TIP proposes adding a new **tempdir** subcommand to the **file**
︙︙
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without the possibility of race conditions.

# Specification

The **file tempdir** command shall implement the functionality of the POSIX
standard mkdtemp\(\) function. With no arguments **file tempdir** shall create
a uniquely named temporary directory in the native operating system's
temporary directory, with naming convention "**tcl\_**_XXXXXX_" where each
_X_ is a randomly selected character \(following the **file tempfile**
naming convention\). Successful completion of **file tempdir** shall return
the absolute path of the created directory, otherwise an error shall be
thrown.

**file tempdir** shall have an optional argument, _template_, to modify
the created directory's path and name. The _template_ shall be decomposed
into \(up to\) two parts: the directory's path and rootname. If either part is
absent, relevant defaults \(e.g., according to the native operating system\)
shall be used. The entire temporary name shall then be formed from the path,
the root, and a generated unique string of \(typically\) six characters.



The command syntax should be defined as:

 > **file tempdir** ?_template_?

# Considerations

 * The subcommand **tempdir** could be a candidate, later, for returning the
   native file system's temporary directory. Naming the subcommand something
   else such as **mktempdir** is another option, though strays from the **file
   tempfile** naming convention.

 * For future extensibility the **template** argument to **file tempdir**
   \(since it is optional\) could be specified in the key / value format,
   **-template**, changing the command syntax to:

	 > > **file tempdir** ?_options..._?

# Reference Implementation

An example of temporary directory creation has already been developed into the
Tcl core, at the C level, within the platform specific layers of the
**load** command. The principal work remaining is to expose this via a Tcl
command.

# Copyright

This document has been placed in the public domain.









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without the possibility of race conditions.

# Specification

The **file tempdir** command shall implement the functionality of the POSIX
standard mkdtemp\(\) function. With no arguments **file tempdir** shall create
a uniquely named temporary directory in the native operating system's
temporary directory, with naming convention "<b>tcl\_</b><i>XXXXXX</i>" where each
_X_ is a randomly selected character \(following the **file tempfile**
naming convention\). Successful completion of **file tempdir** shall return
the absolute path of the created directory, otherwise an error shall be
thrown.

**file tempdir** shall have an optional argument, _template_, to modify
the created directory's path and name. The _template_ shall be decomposed
into \(up to\) two parts: the directory's path and rootname. If either part is
absent, relevant defaults \(e.g., according to the native operating system\)
shall be used. The entire temporary name shall then be formed from the path,
the root, and a generated unique string of \(typically\) six characters. If
the directory part of the _template_ is supplied, it should refer to a
directory on the native filesystem.

The command syntax should be defined as:

 > **file tempdir** ?_template_?

# Considerations

 * The subcommand **tempdir** could be a candidate, later, for returning the
   native file system's temporary directory. Naming the subcommand something
   else such as **mktempdir** is another option, though strays from the **file
   tempfile** naming convention.

 * For future extensibility the _template_ argument to **file tempdir**
   \(since it is optional\) could be specified in the key / value format,
   **-template** _template_, changing the command syntax to:

	 > **file tempdir** ?_options..._?

# Reference Implementation

An example of temporary directory creation has already been developed into the
Tcl core, at the C level, within the platform specific layers of the
**load** command. The principal work remaining is to expose this via a Tcl
command.

# Copyright

This document has been placed in the public domain.