1.\" Copyright (c) 2001 Evan Sarmiento. 2.\" 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, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.\" 25.Dd December 3, 2024 26.Dt PFIND 9 27.Os 28.Sh NAME 29.Nm pfind , zpfind 30.Nd locate a process by number 31.Sh SYNOPSIS 32.In sys/param.h 33.In sys/proc.h 34.Ft "struct proc *" 35.Fn pfind "pid_t pid" 36.Ft "struct proc *" 37.Fn pfind_any "pid_t pid" 38.Ft "struct proc *" 39.Fn pfind_any_locked "pid_t pid" 40.Sh DESCRIPTION 41.Fn pfind 42takes a 43.Fa pid 44as its argument and returns a pointer to the 45.Vt proc 46structure whose PID is specified in the argument only if the 47.Fa pid 48is on the 49.Va allproc 50list. 51.Pp 52.Fn pfind_any 53takes a 54.Fa pid 55as its argument. 56.Fn pfind_any 57searches the 58.Va allproc 59list and returns the first process whose PID matches and whose state is 60.Va PRS_ZOMBIE . 61.Pp 62.Fn pfind_any_locked 63is similar to 64.Fn pfind_any 65,but it does not lock the process hash bucket 66for the given 67.Vt pid . 68Instead, it asserts the corresponding process hash bucket is already locked. 69All three functions 70.Fn pfind , 71.Fn pfind_any , 72and 73.Fn pgfind_any_locked 74lock the 75.Vt proc 76structure before returning. 77.Sh RETURN VALUES 78.Fn pfind , 79.Fn pfind_any , 80and 81.Fn pfind_any_locked 82return pointer to a 83.Vt proc 84structure on success or 85.Dv NULL 86on failure. 87.Sh SEE ALSO 88.Xr pgfind 9 89.Sh AUTHORS 90This manual page was written by 91.An Evan Sarmiento Aq Mt kaworu@sektor7.ath.cx . 92