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-rw-r--r--lib/kernel/doc/src/file.xml91
1 files changed, 65 insertions, 26 deletions
diff --git a/lib/kernel/doc/src/file.xml b/lib/kernel/doc/src/file.xml
index b2a259080d..4a9b7d2ceb 100644
--- a/lib/kernel/doc/src/file.xml
+++ b/lib/kernel/doc/src/file.xml
@@ -4,7 +4,7 @@
<erlref>
<header>
<copyright>
- <year>1996</year><year>2012</year>
+ <year>1996</year><year>2013</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
@@ -100,7 +100,11 @@
<name name="deep_list"/>
</datatype>
<datatype>
- <name name="fd"/>
+ <name><marker id="type-fd">fd()</marker></name>
+ <desc>
+ <p>A file descriptor representing a file opened in <seealso
+ marker="#raw">raw</seealso> mode.</p>
+ </desc>
</datatype>
<datatype>
<name name="filename"/>
@@ -109,8 +113,8 @@
<name name="io_device"/>
<desc>
<p>As returned by
- <seealso marker="#open/2">file:open/2</seealso>,
- a process handling IO protocols.</p>
+ <seealso marker="#open/2">file:open/2</seealso>;
+ <c>pid()</c> is a process handling I/O-protocols.</p>
</desc>
</datatype>
<datatype>
@@ -170,6 +174,18 @@
</desc>
</func>
<func>
+ <name name="allocate" arity="3"/>
+ <fsummary>Allocate file space</fsummary>
+ <desc>
+ <p><c>allocate/3</c> can be used to preallocate space for a file.</p>
+ <p>This function only succeeds in platforms that implement this
+ feature. When it succeeds, space is preallocated for the file but
+ the file size might not be updated. This behaviour depends on the
+ preallocation implementation. To guarantee the file size is updated
+ one must truncate the file to the new size.</p>
+ </desc>
+ </func>
+ <func>
<name name="change_group" arity="2"/>
<fsummary>Change group of a file</fsummary>
<desc>
@@ -261,6 +277,9 @@
{person, "pelle", 30}.</code>
<pre>1> <input>file:consult("f.txt").</input>
{ok,[{person,"kalle",25},{person,"pelle",30}]}</pre>
+ <p>The encoding of of <c><anno>Filename</anno></c> can be set
+ by a comment as described in <seealso
+ marker="stdlib:epp#encoding">epp(3)</seealso>.</p>
</desc>
</func>
<func>
@@ -399,6 +418,9 @@
of the error.</p>
</item>
</taglist>
+ <p>The encoding of of <c><anno>Filename</anno></c> can be set
+ by a comment as described in <seealso
+ marker="stdlib:epp#encoding">epp(3)</seealso>.</p>
</desc>
</func>
<func>
@@ -610,7 +632,7 @@
<name name="open" arity="2"/>
<fsummary>Open a file</fsummary>
<desc>
- <p>Opens the file <c><anno>Filename</anno></c> in the mode determined
+ <p>Opens the file <c><anno>File</anno></c> in the mode determined
by <c><anno>Modes</anno></c>, which may contain one or more of the
following items:</p>
<taglist>
@@ -644,7 +666,8 @@
</item>
<tag><c>raw</c></tag>
<item>
- <p>The <c>raw</c> option allows faster access to a file,
+ <p><marker id="raw"/>
+ The <c>raw</c> option allows faster access to a file,
because no Erlang process is needed to handle the file.
However, a file opened in this way has the following
limitations:</p>
@@ -767,6 +790,10 @@
<p>The Encoding can be changed for a file "on the fly" by using the <seealso marker="stdlib:io#setopts/2">io:setopts/2</seealso> function, why a file can be analyzed in latin1 encoding for i.e. a BOM, positioned beyond the BOM and then be set for the right encoding before further reading.See the <seealso marker="stdlib:unicode">unicode(3)</seealso> module for functions identifying BOM's.</p>
<p>This option is not allowed on <c>raw</c> files.</p>
</item>
+ <tag><c>ram</c></tag>
+ <item>
+ <p><c>File</c> must be <c>iodata()</c>. Returns an <c>fd()</c> which lets the <c>file</c> module operate on the data in-memory as if it is a file.</p>
+ </item>
</taglist>
<p>Returns:</p>
<taglist>
@@ -861,6 +888,9 @@
the error.</p>
</item>
</taglist>
+ <p>The encoding of of <c><anno>Filename</anno></c> can be set
+ by a comment as described in <seealso
+ marker="stdlib:epp#encoding">epp(3)</seealso>.</p>
</desc>
</func>
<func>
@@ -902,6 +932,9 @@
of the error.</p>
</item>
</taglist>
+ <p>The encoding of of <c><anno>Filename</anno></c> can be set
+ by a comment as described in <seealso
+ marker="stdlib:epp#encoding">epp(3)</seealso>.</p>
</desc>
</func>
<func>
@@ -971,7 +1004,10 @@
of the error.</p>
</item>
</taglist>
- </desc>
+ <p>The encoding of of <c><anno>Filename</anno></c> can be set
+ by a comment as described in <seealso
+ marker="stdlib:epp#encoding">epp(3)</seealso>.</p>
+ </desc>
</func>
<func>
<name name="path_script" arity="3"/>
@@ -1220,11 +1256,11 @@
<p>The record <c>file_info</c> contains the following fields.</p>
<taglist>
- <tag><c>size = integer()</c></tag>
+ <tag><c>size = integer() >= 0</c></tag>
<item>
<p>Size of file in bytes.</p>
</item>
- <tag><c>type = device | directory | regular | other</c></tag>
+ <tag><c>type = device | directory | other | regular | symlink</c></tag>
<item>
<p>The type of the file.</p>
</item>
@@ -1232,22 +1268,22 @@
<item>
<p>The current system access to the file.</p>
</item>
- <tag><c>atime = <seealso marker="#type-date_time">date_time()</seealso> | integer() </c></tag>
+ <tag><c>atime = <seealso marker="#type-date_time">date_time()</seealso> | integer() >= 0</c></tag>
<item>
<p>The last time the file was read.</p>
</item>
- <tag><c>mtime = <seealso marker="#type-date_time">date_time()</seealso> | integer() </c></tag>
+ <tag><c>mtime = <seealso marker="#type-date_time">date_time()</seealso> | integer() >= 0</c></tag>
<item>
<p>The last time the file was written.</p>
</item>
- <tag><c>ctime = <seealso marker="#type-date_time">date_time()</seealso> | integer() </c></tag>
+ <tag><c>ctime = <seealso marker="#type-date_time">date_time()</seealso> | integer() >=0</c></tag>
<item>
<p>The interpretation of this time field depends on
the operating system. On Unix, it is the last time
the file or the inode was changed. In Windows, it is
the create time.</p>
</item>
- <tag><c>mode = integer()</c></tag>
+ <tag><c>mode = integer() >= 0</c></tag>
<item>
<p>The file permissions as the sum of the following bit
values:</p>
@@ -1278,33 +1314,33 @@
<p>On Unix platforms, other bits than those listed above
may be set.</p>
</item>
- <tag><c>links = integer()</c></tag>
+ <tag><c>links = integer() >= 0</c></tag>
<item>
<p>Number of links to the file (this will always be 1 for
file systems which have no concept of links).</p>
</item>
- <tag><c>major_device = integer()</c></tag>
+ <tag><c>major_device = integer() >= 0</c></tag>
<item>
<p>Identifies the file system where the file is located.
In Windows, the number indicates a drive as follows:
0 means A:, 1 means B:, and so on.</p>
</item>
- <tag><c>minor_device = integer()</c></tag>
+ <tag><c>minor_device = integer() >= 0</c></tag>
<item>
<p>Only valid for character devices on Unix. In all other
cases, this field is zero.</p>
</item>
- <tag><c>inode = integer()</c></tag>
+ <tag><c>inode = integer() >= 0</c></tag>
<item>
<p>Gives the <c>inode</c> number. On non-Unix file systems,
this field will be zero.</p>
</item>
- <tag><c>uid = integer()</c></tag>
+ <tag><c>uid = integer() >= 0</c></tag>
<item>
<p>Indicates the owner of the file. Will be zero for
non-Unix file systems.</p>
</item>
- <tag><c>gid = integer()</c></tag>
+ <tag><c>gid = integer() >= 0</c></tag>
<item>
<p>Gives the group that the owner of the file belongs to.
Will be zero for non-Unix file systems.</p>
@@ -1502,6 +1538,9 @@
of the error.</p>
</item>
</taglist>
+ <p>The encoding of of <c><anno>Filename</anno></c> can be set
+ by a comment as described in <seealso
+ marker="stdlib:epp#encoding">epp(3)</seealso>.</p>
</desc>
</func>
<func>
@@ -1732,22 +1771,22 @@
<p>The following fields are used from the record, if they are
given.</p>
<taglist>
- <tag><c>atime = <seealso marker="#type-date_time">date_time()</seealso> | integer()</c></tag>
+ <tag><c>atime = <seealso marker="#type-date_time">date_time()</seealso> | integer() >= 0</c></tag>
<item>
<p>The last time the file was read.</p>
</item>
- <tag><c>mtime = <seealso marker="#type-date_time">date_time()</seealso> | integer()</c></tag>
+ <tag><c>mtime = <seealso marker="#type-date_time">date_time()</seealso> | integer() >= 0</c></tag>
<item>
<p>The last time the file was written.</p>
</item>
- <tag><c>ctime = <seealso marker="#type-date_time">date_time()</seealso> | integer()</c></tag>
+ <tag><c>ctime = <seealso marker="#type-date_time">date_time()</seealso> | integer() >= 0</c></tag>
<item>
<p>On Unix, any value give for this field will be ignored
(the "ctime" for the file will be set to the current
time). On Windows, this field is the new creation time to
set for the file.</p>
</item>
- <tag><c>mode = integer()</c></tag>
+ <tag><c>mode = integer() >= 0</c></tag>
<item>
<p>The file permissions as the sum of the following bit
values:</p>
@@ -1778,15 +1817,15 @@
<p>On Unix platforms, other bits than those listed above
may be set.</p>
</item>
- <tag><c>uid = integer()</c></tag>
+ <tag><c>uid = integer() >= 0</c></tag>
<item>
<p>Indicates the owner of the file. Ignored for non-Unix
file systems.</p>
</item>
- <tag><c>gid = integer()</c></tag>
+ <tag><c>gid = integer() >= 0</c></tag>
<item>
<p>Gives the group that the owner of the file belongs to.
- Ignored non-Unix file systems.</p>
+ Ignored for non-Unix file systems.</p>
</item>
</taglist>
<p>Typical error reasons:</p>