LDP
/
man-pages
mirror of https://github.com/mkerrisk/man-pages
0
1
Fork 0
Code Releases Activity
11,183 Commits 1 Branch 197 Tags 93 MiB
Commit Graph

176 Commits

Author SHA1 Message Date
Michael Kerrisk 1ce579fc39 fcntl.2: ERRORS: Document ENOTDIR error for F_NOTIFY 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-07-08 12:07:15 +02:00
Michael Kerrisk 8be6f4e1cd fcntl.2: Use proper page cross-references in F_NOTIFY discussion 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-07-05 08:54:58 +02:00
Michael Kerrisk 5c4d5f9715 fcntl.2: The return value for F_SETPIPE_SZ is the pipe capacity 
Reported-by: Tomi Salminen <tlsalmin@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-07-01 11:40:36 +02:00
Michael Kerrisk 91085d8525 Removed trailing white space at end of lines 2014-06-14 08:03:45 +02:00
Michael Kerrisk ad5b45abe5 localedef.1, execve.2, fcntl.2, flock.2, lseek.2, open.2, open_by_handle_at.2, recvmmsg.2, sendmmsg.2, seteuid.2, setresuid.2, setreuid.2, setuid.2, statfs.2, syscalls.2, basename.3, catgets.3, getdate.3, getdirentries.3, getdtablesize.3, iconv.3, lockf.3, malloc_get_state.3, malloc_usable_size.3, matherr.3, mkdtemp.3, mkstemp.3, mq_close.3, mq_unlink.3, siginterrupt.3, system.3, locale.5, bootparam.7, environ.7, man-pages.7, signal.7, unicode.7, utf-8.7: tstamp 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-13 17:15:44 +02:00
Michael Kerrisk 864eb97814 fcntl.2: wfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-06-12 15:29:19 +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 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 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 3d15531307 chown.2, fcntl.2, futex.2, recvmmsg.2, sched_setscheduler.2, semget.2, shmget.2, malloc.3, pthread_attr_setinheritsched.3, pthread_attr_setschedparam.3, pthread_attr_setschedpolicy.3, pthread_setaffinity_np.3, strcpy.3, capabilities.7, cpuset.7, credentials.7, pthreads.7: tstamp 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-05-21 13:15:30 +02:00
Michael Kerrisk 381eddf1bc fcntl.2: Add "file locking" subheading under NOTES 
(No actual changes to the text.)

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-05-15 08:55:20 +02:00
Michael Kerrisk 2f4772d2d2 fcntl.2: Note the race when O_CLOEXEC is used at same time as fork()+execve() 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-04-20 10:46:40 +02:00
Michael Kerrisk 621ab85e80 fcntl.2: grfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-03-26 07:33:15 +01:00
Michael Kerrisk 14e9f7cf4b fcntl.2, strtol.3, strtoul.3, socket.7: ffix in feature test macro names 
Reported-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-03-18 20:17:50 +01:00
Michael Kerrisk 7e2cb38315 fcntl.2: spfix 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-03-16 11:36:57 +01:00
Michael Kerrisk eceaee4705 fcntl.2: Warn that F_GETLK info may already be out of date when the call returns 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-02-20 08:34:28 +01:00
Michael Kerrisk dc45cae328 fcntl.2: Minor fix: reorder constants to match order of accompanying text 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-02-20 08:32:14 +01:00
Michael Kerrisk 7a9d6ddece Removed trailing white space at end of lines 2014-02-11 12:17:35 +01:00
Michael Kerrisk a797afac4e fcntl.2, msgget.2, ptrace.2, request_key.2, shmget.2, sigaction.2, syscalls.2, dbopen.3, euidaccess.3, getgrnam.3, getpwnam.3, strfmon.3, strtol.3, strtoul.3, cciss.4, hpsa.4, mouse.4, termcap.5, charsets.7, iso_8859-16.7, iso_8859-2.7, koi8-r.7, unicode.7, utf-8.7: Use Oxford comma 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-02-05 16:09:11 +01:00
Michael Kerrisk 93265f420c fcntl.2: POSIX.1 specifies F_SETOWN and F_GETOWN for sockets/SIGURG 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-01-22 04:46:48 +01:00
Michael Kerrisk 639b33d7b8 fcntl.2: BUGS: The O_SYNC and O_DSYNC flags are not modifiable using F_SETFL 
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-01-22 04:28:21 +01:00
Michael Kerrisk 7168d2f88b fcntl.2: Add susbsections under BUGS 
There's several bugs listed. It's helpful to mark
them separately.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
 2014-01-21 08:44:44 +01:00