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| author | Erlang/OTP <[email protected]> | 2010-06-07 14:24:46 +0000 |
|---|---|---|
| committer | Erlang/OTP <[email protected]> | 2010-06-07 14:24:46 +0000 |
| commit | 3e97f3dc6ad63707d283e7b9924df5cc8eb13a84 (patch) | |
| tree | 0e66d4f9eeb04605fde8089332bd38aed8fdc653 /lib/kernel/doc/src/file.xml | |
| parent | 4f63a79d28435659af11fa94ed93f670a6759f4a (diff) | |
| parent | bac96ae5bb5bfaa0c160a603c6db01dbcd7c83df (diff) | |
| download | otp-3e97f3dc6ad63707d283e7b9924df5cc8eb13a84.tar.gz otp-3e97f3dc6ad63707d283e7b9924df5cc8eb13a84.tar.bz2 otp-3e97f3dc6ad63707d283e7b9924df5cc8eb13a84.zip | |
Merge branch 'ms/file-exclusive-mode' into dev
* ms/file-exclusive-mode:
Update preloaded modules
Support opening files in exclusive mode
OTP-8670 ms/file-exclusive-mode
There is a new option 'exclusive' to file:open/2 that uses the OS O_EXCL
flag where supported to open the file in exclusive mode.
Diffstat (limited to 'lib/kernel/doc/src/file.xml')
| -rw-r--r-- | lib/kernel/doc/src/file.xml | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/lib/kernel/doc/src/file.xml b/lib/kernel/doc/src/file.xml index 382262d1ee..a9ceac0bcf 100644 --- a/lib/kernel/doc/src/file.xml +++ b/lib/kernel/doc/src/file.xml @@ -603,7 +603,7 @@ f.txt: {person, "kalle", 25}. <type> <v>Filename = name()</v> <v>Modes = [Mode]</v> - <v> Mode = read | write | append | raw | binary | {delayed_write, Size, Delay} | delayed_write | {read_ahead, Size} | read_ahead | compressed</v> + <v> Mode = read | write | append | exclusive | raw | binary | {delayed_write, Size, Delay} | delayed_write | {read_ahead, Size} | read_ahead | compressed</v> <v> Size = Delay = int()</v> <v>IoDevice = io_device()</v> <v>Reason = ext_posix() | system_limit</v> @@ -630,6 +630,17 @@ f.txt: {person, "kalle", 25}. file opened with <c>append</c> will take place at the end of the file.</p> </item> + <tag><c>exclusive</c></tag> + <item> + <p>The file, when opened for writing, is created if it + does not exist. If the file exists, open will return + <c>{error, eexist}</c>.</p> + <warning><p>This option does not guarantee exclusiveness on + file systems that do not support O_EXCL properly, + such as NFS. Do not depend on this option unless you + know that the file system supports it (in general, local + file systems should be safe).</p></warning> + </item> <tag><c>raw</c></tag> <item> <p>The <c>raw</c> option allows faster access to a file, |