diff options
| author | Johannes Schindelin <johannes.schindelin@gmx.de> | 2015-12-01 17:02:14 +0300 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2015-12-07 19:37:44 +0300 |
| commit | fb71716d2c248de22ecd86dd8e3a1f4185eb8e87 (patch) | |
| tree | e86a1fed507c62251bcfe17b7832c8d8fcde3dc1 /winsup/doc | |
| parent | 5644f71428ba571b733db255e31dc39aba13ad8a (diff) | |
Introduce the 'usertemp' filesystem type
* mount.cc (mount_info::from_fstab_line): Support mounting the current
user's temp folder as /tmp/. This is particularly useful a feature
when Cygwin's own files are write-protected.
* pathnames.xml: document the new usertemp file system type
Detailed explanation:
In the context of Windows, there is a per-user directory for temporary
files, by default specified via the environment variable %TEMP%. Let's
allow to use that directory for our /tmp/ directory.
With this patch, we introduce the special filesystem type "usertemp":
By specifying
none /tmp usertemp binary,posix=0 0 0
in /etc/fstab, the /tmp/ directory gets auto-mounted to the directory
specified by the %TEMP% variable.
This feature comes handy in particularly in scenarios where the
administrator might want to write-protect the entire Cygwin directory
yet still needs to allow users to write into the /tmp/ directory.
This is the case in the context of Git for Windows, where the
Cygwin (MSys2) root directory lives inside C:\Program Files and hence
/tmp/ would not be writable otherwise.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Diffstat (limited to 'winsup/doc')
| -rw-r--r-- | winsup/doc/ChangeLog | 4 | ||||
| -rw-r--r-- | winsup/doc/pathnames.xml | 24 |
2 files changed, 25 insertions, 3 deletions
diff --git a/winsup/doc/ChangeLog b/winsup/doc/ChangeLog index f9ae2b54e..4bdeb5fce 100644 --- a/winsup/doc/ChangeLog +++ b/winsup/doc/ChangeLog @@ -1,3 +1,7 @@ +2015-12-07 Johannes Schindelin <johannes.schindelin@gmx.de> + + * pathnames.xml: Document the new usertemp file system type. + 2015-12-06 Corinna Vinschen <corinna@vinschen.de> * new-features.xml (ov-new2.4): Document cygpath -U option. diff --git a/winsup/doc/pathnames.xml b/winsup/doc/pathnames.xml index 9077303b4..9941633c4 100644 --- a/winsup/doc/pathnames.xml +++ b/winsup/doc/pathnames.xml @@ -74,9 +74,10 @@ doesn't matter if you write <literal>FAT</literal> into this field even if the filesystem is NTFS. Cygwin figures out the filesystem type and its capabilities by itself.</para> -<para>The only exception is the file system type cygdrive. This type is -used to set the cygdrive prefix. For a description of the cygdrive prefix -see <xref linkend="cygdrive"></xref></para> +<para>The only two exceptions are the file system types cygdrive and usertemp. +The cygdrive type is used to set the cygdrive prefix. For a description of +the cygdrive prefix see <xref linkend="cygdrive"></xref>, for a description of +the usertemp file system type see <xref linkend="usertemp"></xref></para> <para>The fourth field describes the mount options associated with the filesystem. It is formatted as a comma separated list of @@ -354,6 +355,23 @@ independently from the current cygdrive prefix:</para> </sect2> +<sect2 id="usertemp"><title>The usertemp file system type</title> + +<para>On Windows, the environment variable <literal>TEMP</literal> specifies +the location of the temp folder. It serves the same purpose as the /tmp/ +directory in Unix systems. In contrast to /tmp/, it is by default a +different folder for every Windows. By using the special purpose usertemp +file system, that temp folder can be mapped to /tmp/. This is particularly +useful in setups where the administrator wants to write-protect the entire +Cygwin directory. The usertemp file system can be configured in /etc/fstab +like this:</para> + +<screen> + none /tmp usertemp binary,posix=0 0 0 +</screen> + +</sect2> + <sect2 id="pathnames-symlinks"><title>Symbolic links</title> <para>Symbolic links are not present and supported on Windows until Windows |