msem_unlock man page on HP-UX

Man page or keyword search:  
man Server   10987 pages
apropos Keyword Search (all sections)
Output format
HP-UX logo
[printable version]

msem_unlock(2)							msem_unlock(2)

NAME
       msem_unlock - unlock a semaphore

SYNOPSIS
DESCRIPTION
       unlocks a binary semaphore.

       sem points to an structure that specifies the semaphore to be unlocked.

       If  the	condition  argument  is	 zero, the semaphore will be unlocked,
       whether or not any other processes are currently attempting to lock it.
       If  the condition argument is and some other process is waiting to lock
       the semaphore or the implementation cannot reliably  determine  whether
       some  process  is  waiting  to  lock  the  semaphore,  the semaphore is
       unlocked by the calling process.	 If the condition argument is  and  no
       process is waiting to lock the semaphore, the semaphore is not unlocked
       and an error is returned.

       All calls to and by  multiple  processes	 sharing  a  common  structure
       behave as if the calls were serialized.

       If  the	structure contains any value not resulting from a call to fol‐
       lowed by a (possibly empty) sequence of calls to and  the  results  are
       undefined.   The	 address  of an uniquely identifies the semaphore.  If
       the structure contains any value copied from a structure at a different
       address, the result is undefined.

IMPLEMENTATION NOTES
       The  system attempts to ignore or recover from invalid values placed in
       the structure, but this is not guaranteed for all cases.

RETURN VALUE
       Upon success, returns zero; otherwise, it returns −1 and sets to	 indi‐
       cate the error.

ERRORS
       fails if any of the following conditions are encountered:

	      [EAGAIN]	     was specified and there were no waiters.

	      [EINVAL]	     sem points to an structure that has been removed,
			     or condition is invalid.

	      [EFAULT]	     sem is an invalid pointer.

AUTHOR
       was developed by HP and OSF.

SEE ALSO
       msem_init(2), msem_lock(2), msem_remove(2), mman(5).

STANDARDS CONFORMANCE
								msem_unlock(2)
[top]

List of man pages available for HP-UX

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Tweet
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
Vote for polarhome
Free Shell Accounts :: the biggest list on the net