svn commit: r201884 - head/lib/libc/gen

[David Xu]

Author: davidxu
Date: Sat Jan  9 05:40:46 2010
New Revision: 201884
URL: http://svn.freebsd.org/changeset/base/201884

Log:
  Update manual for sem_init and sem_open, restrictions of shared semaphore
  and 14 characters in name length no longer exist.
  
  Reviewed by:	deischen@

Modified:
  head/lib/libc/gen/sem_init.3
  head/lib/libc/gen/sem_open.3

Modified: head/lib/libc/gen/sem_init.3
==============================================================================
--- head/lib/libc/gen/sem_init.3	Sat Jan  9 04:59:57 2010	(r201883)
+++ head/lib/libc/gen/sem_init.3	Sat Jan  9 05:40:46 2010	(r201884)
@@ -46,9 +46,19 @@ function initializes the unnamed semapho
 .Fa sem
 to have the value
 .Fa value .
+.Pp
 A non-zero value for
 .Fa pshared
-specifies a shared semaphore that can be used by multiple processes.
+specifies a shared semaphore that can be used by multiple processes,
+the semaphore should be located in shared memory region (see
+.Xr mmap 2 ,
+.Xr shm_open 2 , 
+and
+.Xr shmget 2 ) ,
+any process having read and write access to address
+.Fa sem
+can perform semaphore operations on
+.Fa sem .
 .Pp
 Following a successful call to
 .Fn sem_init ,

Modified: head/lib/libc/gen/sem_open.3
==============================================================================
--- head/lib/libc/gen/sem_open.3	Sat Jan  9 04:59:57 2010	(r201883)
+++ head/lib/libc/gen/sem_open.3	Sat Jan  9 05:40:46 2010	(r201884)
@@ -58,6 +58,12 @@ The returned semaphore may be used in su
 and
 .Fn sem_close .
 .Pp
+This implementation places strict requirements on the value of
+.Fa name :
+it must begin with a slash
+.Pq Ql / ,
+contain no other slash characters.
+.Pp
 The following bits may be set in the
 .Fa oflag
 argument:
@@ -217,11 +223,3 @@ functions conform to
 .Sh HISTORY
 Support for named semaphores first appeared in
 .Fx 5.0 .
-.Sh BUGS
-This implementation places strict requirements on the value of
-.Fa name :
-it must begin with a slash
-.Pq Ql / ,
-contain no other slash characters,
-and be less than 14 characters in length
-not including the terminating null character.