xref: /illumos-gate/usr/src/man/man3proc/Preopen.3proc (revision bbf215553c7233fbab8a0afdf1fac74c44781867)
143051d27SRobert Mustacchi.\"
243051d27SRobert Mustacchi.\" This file and its contents are supplied under the terms of the
343051d27SRobert Mustacchi.\" Common Development and Distribution License ("CDDL"), version 1.0.
443051d27SRobert Mustacchi.\" You may only use this file in accordance with the terms of version
543051d27SRobert Mustacchi.\" 1.0 of the CDDL.
643051d27SRobert Mustacchi.\"
743051d27SRobert Mustacchi.\" A full copy of the text of the CDDL should have accompanied this
843051d27SRobert Mustacchi.\" source.  A copy of the CDDL is also available via the Internet at
943051d27SRobert Mustacchi.\" http://www.illumos.org/license/CDDL.
1043051d27SRobert Mustacchi.\"
1143051d27SRobert Mustacchi.\"
1243051d27SRobert Mustacchi.\" Copyright 2015 Joyent, Inc.
1343051d27SRobert Mustacchi.\"
1443051d27SRobert Mustacchi.Dd May 11, 2016
1543051d27SRobert Mustacchi.Dt PREOPEN 3PROC
1643051d27SRobert Mustacchi.Os
1743051d27SRobert Mustacchi.Sh NAME
1843051d27SRobert Mustacchi.Nm Preopen
1943051d27SRobert Mustacchi.Nd reopen a process
20ab618543SJohn Levon.Sh LIBRARY
2143051d27SRobert Mustacchi.Lb libproc
22ab618543SJohn Levon.Sh SYNOPSIS
2343051d27SRobert Mustacchi.In libproc.h
2443051d27SRobert Mustacchi.Ft int
2543051d27SRobert Mustacchi.Fo Preopen
2643051d27SRobert Mustacchi.Fa "struct ps_prochandle *P"
2743051d27SRobert Mustacchi.Fc
2843051d27SRobert Mustacchi.Sh DESCRIPTION
2943051d27SRobert MustacchiThe
3043051d27SRobert Mustacchi.Fn Preopen
3143051d27SRobert Mustacchifunction is used to regain control of the process represented by the
3243051d27SRobert Mustacchihandle
3343051d27SRobert Mustacchi.Fa P .
3443051d27SRobert MustacchiA loss of control is indicated by the
3543051d27SRobert Mustacchi.Xr Pstatus 3PROC
3643051d27SRobert Mustacchifunction returning the value
3743051d27SRobert Mustacchi.Dv PS_LOST .
3843051d27SRobert MustacchiThis may occur when the controlled process performs an
3943051d27SRobert Mustacchi.Xr exec 2
4043051d27SRobert Mustacchiof a setuid or setgid binary or one where the controlling process cannot
4172d3dbb9SYuri Pankovread the object file.
4272d3dbb9SYuri PankovFor more information on this, see the
4343051d27SRobert Mustacchi.Sy PROGRAMMING NOTES
4443051d27SRobert Mustacchisection of
45*bbf21555SRichard Lowe.Xr proc 5 .
4643051d27SRobert Mustacchi.Pp
4743051d27SRobert MustacchiIf successful, the controlling process will obtain control of the
4843051d27SRobert Mustacchiprocess specified by
4943051d27SRobert Mustacchi.Fa P .
5043051d27SRobert MustacchiIf it fails, the controlling process should release the handle with
5143051d27SRobert Mustacchi.Xr Prelease 3PROC .
5243051d27SRobert MustacchiNote there are occasions where due to permissions it may not be possible
5343051d27SRobert Mustacchito obtain control again.
5443051d27SRobert Mustacchi.Sh RETURN VALUES
5543051d27SRobert MustacchiUpon successful completion, the
5643051d27SRobert Mustacchi.Fn Preopen
5743051d27SRobert Mustacchifunction returns
5843051d27SRobert Mustacchi.Sy 0.
5943051d27SRobert MustacchiOtherwise,
6043051d27SRobert Mustacchi.Sy -1
6143051d27SRobert Mustacchiis returned.
6243051d27SRobert Mustacchi.Sh INTERFACE STABILITY
6343051d27SRobert Mustacchi.Sy Uncommitted
6443051d27SRobert Mustacchi.Sh MT-LEVEL
6543051d27SRobert MustacchiSee
6643051d27SRobert Mustacchi.Sy LOCKING
6743051d27SRobert Mustacchiin
6843051d27SRobert Mustacchi.Xr libproc 3LIB .
6943051d27SRobert Mustacchi.Sh SEE ALSO
7043051d27SRobert Mustacchi.Xr exec 2 ,
7143051d27SRobert Mustacchi.Xr libproc 3LIB ,
7243051d27SRobert Mustacchi.Xr Prelease 3PROC ,
7343051d27SRobert Mustacchi.Xr Pstatus 3PROC ,
74*bbf21555SRichard Lowe.Xr proc 5
75