| ucred.9 (98081) | ucred.9 (99576) |
|---|---|
| 1.\" 2.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice(s), this list of conditions and the following disclaimer as --- 10 unchanged lines hidden (view full) --- 19.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 22.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 25.\" DAMAGE. 26.\" | 1.\" 2.\" Copyright (C) 2001 Chad David <davidc@acns.ab.ca>. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice(s), this list of conditions and the following disclaimer as --- 10 unchanged lines hidden (view full) --- 19.\" DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 22.\" CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH 25.\" DAMAGE. 26.\" |
| 27.\" $FreeBSD: head/share/man/man9/ucred.9 98081 2002-06-10 05:18:00Z davidc $ | 27.\" $FreeBSD: head/share/man/man9/ucred.9 99576 2002-07-08 07:34:46Z julian $ |
| 28.\" 29.Dd March 3, 2002 30.Dt UCRED 9 31.Os 32.Sh NAME 33.Nm ucred , 34.Nm crget , 35.Nm crhold , --- 102 unchanged lines hidden (view full) --- 138.Fn crdup 139all return a pointer to a 140.Vt ucred 141structure. 142.Pp 143.Fn crshared 144returns 0 if the credential has a reference count greater than 1; 145otherwise, 1 is returned. | 28.\" 29.Dd March 3, 2002 30.Dt UCRED 9 31.Os 32.Sh NAME 33.Nm ucred , 34.Nm crget , 35.Nm crhold , --- 102 unchanged lines hidden (view full) --- 138.Fn crdup 139all return a pointer to a 140.Vt ucred 141structure. 142.Pp 143.Fn crshared 144returns 0 if the credential has a reference count greater than 1; 145otherwise, 1 is returned. |
| 146.Sh USAGE NOTES 147In general in a system call, 148you should always use the 149.Vt ucred 150associated with the 151thread doing the work rather than that of the process attached to it, 152As that associated with the thread is guaranteed to be safely accessed 153under SMP, and will remain stable for the duration of the call, even 154in the face of a multithreaded application changing the process credentials 155from another thread. |
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| 146.Sh SEE ALSO 147.Xr uihold 9 148.Sh AUTHORS 149This man page was written by 150.An Chad David Aq davidc@acns.ab.ca . | 156.Sh SEE ALSO 157.Xr uihold 9 158.Sh AUTHORS 159This man page was written by 160.An Chad David Aq davidc@acns.ab.ca . |