Author: jilles Date: Wed Apr 24 21:24:35 2013 New Revision: 249859 URL: http://svnweb.freebsd.org/changeset/base/249859
Log: getdtablesize(2): Describe what this function actually does. getdtablesize() returns the limit on new file descriptors; this says nothing about existing descriptors. MFC after: 1 week Modified: head/lib/libc/sys/getdtablesize.2 Modified: head/lib/libc/sys/getdtablesize.2 ============================================================================== --- head/lib/libc/sys/getdtablesize.2 Wed Apr 24 21:21:03 2013 (r249858) +++ head/lib/libc/sys/getdtablesize.2 Wed Apr 24 21:24:35 2013 (r249859) @@ -28,12 +28,12 @@ .\" @(#)getdtablesize.2 8.1 (Berkeley) 6/4/93 .\" $FreeBSD$ .\" -.Dd June 4, 1993 +.Dd April 24, 2013 .Dt GETDTABLESIZE 2 .Os .Sh NAME .Nm getdtablesize -.Nd get descriptor table size +.Nd get file descriptor limit .Sh LIBRARY .Lb libc .Sh SYNOPSIS @@ -41,18 +41,20 @@ .Ft int .Fn getdtablesize void .Sh DESCRIPTION -Each process has a fixed size descriptor table, -which is guaranteed to have at least 20 slots. -The entries in -the descriptor table are numbered with small integers starting at 0. The .Fn getdtablesize -system call returns the size of this table. +system call returns the maximum number of file descriptors +that the current process may open. +The maximum file descriptor number that the system may assign +is the return value minus one. +Existing file descriptor numbers may be higher +if the limit was lowered after they were opened. .Sh SEE ALSO .Xr close 2 , +.Xr closefrom 2 , .Xr dup 2 , -.Xr open 2 , -.Xr select 2 +.Xr getrlimit 2 , +.Xr sysconf 2 .Sh HISTORY The .Fn getdtablesize _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
