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Author SHA1 Message Date
Qian Lei 0e7d2e7fcd mq_close.3: ATTRIBUTES: Note function that is thread-safe 
The function mq_close() is thread safe.

Signed-off-by: Qian Lei <qianl.fnst@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-10 16:45:44 +02:00
Qian Lei 7675964213 mq_unlink.3: ATTRIBUTES: Note function that is thread-safe 
The function mq_unlink() is thread safe.

Signed-off-by: Qian Lei <qianl.fnst@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-10 16:45:05 +02:00
Michael Kerrisk 29d3bdc482 seteuid.2, setresuid.2, setreuid.2, setuid.2: spfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:41:32 +02:00
Michael Kerrisk 76868835e7 fcntl.2: Add notes on F_SETLKW deadlock detection and its limitations 
Reported-by: Jeff Layton <jlayton@poochiereds.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:49 +02:00
Michael Kerrisk 241e02302d fcntl.2: wfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:49 +02:00
Michael Kerrisk d2e429c1a8 fcntl.2: The kernel does not perform deadlock detection for OFD locks 
See kernel commit 57b65325fe34ec4c917bc4e555144b4a94d9e1f7
And this mail thread:

    http://thread.gmane.org/gmane.linux.file-systems/81318/focus=81327
    From: Jeff Layton <jlayton <at> redhat.com>
    Subject: [PATCH v5 13/14] locks: skip deadlock detection on FL_FILE_PVT locks
    Date: 2014-01-09 14:19:46 GMT

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:49 +02:00
Michael Kerrisk d20d9d33ab open.2: Rework and extend the discussion of open file descriptions 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:49 +02:00
Michael Kerrisk 22603b1d5c lseek.2: Add reference to open(2) for discussion of file descriptors and OFDs 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:49 +02:00
Michael Kerrisk 6451570257 fcntl.2: Under OFD locks add a reference to open(2) for explanation of OFDs 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:49 +02:00
Michael Kerrisk 5879ccc0d3 fork.2: Add notes on inheritance of flock() and OFD locks across fork() 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:49 +02:00
Michael Kerrisk d068eb3b73 fcntl.2: Explain POSIX background to EACCES/EAGAIN error for F_GETLK 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 9c26bc8c20 fcntl.2: F_OFD_GETLK fails with EAGAIN when there is a lock conflict 
For F_GETLK, POSIX allows EACCES or EAGAIN because different
implementations of traditional record locks returned one of
these errors, and portable applications had to handle either
possibility. However, that argument doesn't apply for OFD
locks, since Linux is the only implementation and it returns
EAGAIN.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 6024e7332f fcntl.2: Describe how to check whether the kernel supports a particular command 
Reported-by: Jeff Layton <jlayton@poochiereds.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 102b34d811 fcntl.2: ERRORS: add EINVAL for invalid 'cmd' 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk d9312ec7c0 fcntl.2: Minor wording improvement 
Reported-by: Jeff Layton <jlayton@poochiereds.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 9044058e60 fcntl.2: Add an explicit note that mandatory locking is not in POSIX 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk f5cdb4b0fc fcntl.2: Make the warning that mandatory locks are unreliable more prominent 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 6799ba26c9 fcntl.2: wfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 9acee57885 fcntl.2: Rewrite introductory paragraphs on mandatory locking 
Make the structure more logical, and also explicitly mention
OFD locks.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 4b5c506a2c fcntl.2: Add EINVAL error for OFD locks where 'l_pid' is not 0 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk c11b47b3b1 fcntl.2: CONFORMING TO: note that OFD locks are Linux-specific 
But they make their way into the next POSIX release

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 97e03523e5 fcntl.2: Describe semantics for compatible and conflicting OFD locks 
And describe how threads can use OFD locks to ensure
exclusive access to a file.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 1a93af040c fcntl.2: Detail the limitations of traditional (process-associated) locks 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk bfb147160f fcntl.2: Minor fixes to introductory par on OFD locks 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 38702b6ccc fcntl.2: OFD locks are Linux-specific and available since Linux 3.15 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 99b5ab7933 fcntl.2: Tweaks and rewrites of pieces of Jeff Layton's patch 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Jeff Layton 2d3e4b83a3 fcntl.2: Document open file description locks 
As provided by the fcntl() operations F_OFD_SETLK,
F_OFD_SETLKW, and F_OFD_GETLK

Signed-off-by: Jeff Layton <jlayton@poochiereds.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 7562b10e23 fcntl.2: Add para introducing advisory locks and noting existence of OFD locks 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 86fbd8d849 fcntl.2: Minor change: move some NOTES text on record locking 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 15b4459067 fcntl.2: wfix + ffix: fine-tuning on NFSv4 client locking text 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 70fd304581 fcntl.2: Add NOTES subhead for record locking and NFS 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk da0d60febb fcntl.2: nfsv4leasetime controls the "contact lost" interval for NFSv4 
Jeff Layton:
   The difference here is subtle. The gracetime is how long after a reboot
   should knfsd allow clients to reclaim state (and deny the creation of
   new locks and opens). The leasetime is how long the NFSv4 lease period
   is. There is a relationship between the two that's illustrated in the
   comments above write_gracetime:

     /**
      * write_gracetime - Set or report current NFSv4 grace period time
      *
      * As above, but sets the time of the NFSv4 grace period.
      *
      * Note this should never be set to less than the *previous*
      * lease-period time, but we don't try to enforce this.  (In the common
      * case (a new boot), we don't know what the previous lease time was
      * anyway.)
      */

   The value you're interested in here is the nfsv4leasetime. If the
   client doesn't renew its lease within that period, then it's subject to
   the server giving up on it and dropping any state that it holds on that
   clients' behalf.

   Note that this is not a firm timeout. The server runs a job
   periodically to clean out expired stateful objects, and it's likely
   that there is some time (maybe even up to another whole lease period)
   between when the timeout expires and the job actually runs. If the
   client gets a RENEW in there within that window, its lease will be
   renewed and its state preserved.

Reported-by: Jeff Layton <jlayton@poochiereds.net>
Cowritten-by: Jeff Layton <jlayton@poochiereds.net>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk af8713605a fcntl.2: Refine discussion of locks when NFSv4 client loses contact with server 
Reported-by: NeilBrown <neilb@suse.de>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 6ca357f965 fcntl.2: Note treatment of locks when an NFS client loses contact with the server 
Based on text sent by Neil Brown.

Reported-by: NeilBrown <neilb@suse.de>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk 9584daf7f3 fcntl.2: Minor rewording 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:48 +02:00
Michael Kerrisk cf118c620f fcntl.2: srcfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:47 +02:00
Michael Kerrisk 91ac17b2c7 fcntl.2: Reword discussion of mandatory lock bug a litte 
Jeff Layton confirmed that the bug remains even in modern kernels.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:47 +02:00
Michael Kerrisk 05a0fb665a flock.2: In some modern BSDs, fcntl() and flock() locks do interact 
So, reword and extend the discussion of this topic in NOTES.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:33:38 +02:00
Michael Kerrisk b1b70920af flock.2: Move NOTES text describing implementation of flock() 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:30:37 +02:00
Michael Kerrisk e449654fdb flock.2: Add more details on NFS, including Linux 2.6.37 changes 
Also: move NOTES text describing interaction of fcntl()
and flock() locks.

Reviewed-by: NeilBrown <neilb@suse.de>
Reported-by: NeilBrown <neilb@suse.de>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:30:37 +02:00
Peng Haitao fee98b6e5c mkdtemp.3: ATTRIBUTES: Note function that is thread-safe 
The function mkdtemp() is thread safe.

Signed-off-by: Peng Haitao <penght@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:28:42 +02:00
Peng Haitao 61d995d649 basename.3: ATTRIBUTES: Note functions that are thread-safe 
The functions basename() and dirname() are thread safe.

Signed-off-by: Peng Haitao <penght@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:28:42 +02:00
Peng Haitao 527c8d41b9 system.3: ATTRIBUTES: Note function that is thread-safe 
The function system() is thread safe.

Signed-off-by: Peng Haitao <penght@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:28:42 +02:00
Michael Kerrisk f4dc1f56ee catgets.3: wfix 
Reported-by: Peng Haitao <penght@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:28:42 +02:00
Peng Haitao 8114fa1417 catgets.3: ATTRIBUTES: Note function that is thread-safe 
The function catgets() is thread safe.

Signed-off-by: Peng Haitao <penght@cn.fujitsu.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:28:42 +02:00
Michael Kerrisk 3f205b20d7 environ.7: SEE ALSO: add env(1), printenv(1), ld.so(8) 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-09 21:28:38 +02:00
Yuri Kozlov f2f50fed25 fanotify_mark.2: tfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-08 21:16:39 +02:00
Yuri Kozlov d1c05d0b78 send.2: tfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-08 21:16:06 +02:00
Michael Kerrisk 79745892b6 charsets.7: Drop unneeded text on UTF-8 for Biblical Hebrew 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-06 06:37:46 +02:00
Marko Myllynen 03ba14f978 localedef.1: Align with recent charmap(5) / repertoiremap(5) changes 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-05 20:18:02 +02:00