11eaf0ac3Slogwang /*-
2*22ce4affSfengbojiang * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3*22ce4affSfengbojiang *
41eaf0ac3Slogwang * Copyright (c) 2009 Ulf Lilleengen
51eaf0ac3Slogwang * All rights reserved.
61eaf0ac3Slogwang *
71eaf0ac3Slogwang * Redistribution and use in source and binary forms, with or without
81eaf0ac3Slogwang * modification, are permitted provided that the following conditions
91eaf0ac3Slogwang * are met:
101eaf0ac3Slogwang * 1. Redistributions of source code must retain the above copyright
111eaf0ac3Slogwang * notice, this list of conditions and the following disclaimer.
121eaf0ac3Slogwang * 2. Redistributions in binary form must reproduce the above copyright
131eaf0ac3Slogwang * notice, this list of conditions and the following disclaimer in the
141eaf0ac3Slogwang * documentation and/or other materials provided with the distribution.
151eaf0ac3Slogwang *
161eaf0ac3Slogwang * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
171eaf0ac3Slogwang * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
181eaf0ac3Slogwang * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
191eaf0ac3Slogwang * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
201eaf0ac3Slogwang * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
211eaf0ac3Slogwang * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
221eaf0ac3Slogwang * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
231eaf0ac3Slogwang * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
241eaf0ac3Slogwang * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
251eaf0ac3Slogwang * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
261eaf0ac3Slogwang * SUCH DAMAGE.
271eaf0ac3Slogwang *
281eaf0ac3Slogwang * $FreeBSD$
291eaf0ac3Slogwang */
301eaf0ac3Slogwang
311eaf0ac3Slogwang #include <sys/cdefs.h>
321eaf0ac3Slogwang __FBSDID("$FreeBSD$");
331eaf0ac3Slogwang
341eaf0ac3Slogwang #include <sys/param.h>
351eaf0ac3Slogwang #include <sys/sysctl.h>
36*22ce4affSfengbojiang #include <sys/user.h>
371eaf0ac3Slogwang #include <stdlib.h>
381eaf0ac3Slogwang #include <string.h>
391eaf0ac3Slogwang
401eaf0ac3Slogwang #include "libutil.h"
411eaf0ac3Slogwang
421eaf0ac3Slogwang struct kinfo_proc *
kinfo_getproc(pid_t pid)431eaf0ac3Slogwang kinfo_getproc(pid_t pid)
441eaf0ac3Slogwang {
451eaf0ac3Slogwang struct kinfo_proc *kipp;
461eaf0ac3Slogwang int mib[4];
471eaf0ac3Slogwang size_t len;
481eaf0ac3Slogwang
491eaf0ac3Slogwang len = 0;
501eaf0ac3Slogwang mib[0] = CTL_KERN;
511eaf0ac3Slogwang mib[1] = KERN_PROC;
521eaf0ac3Slogwang mib[2] = KERN_PROC_PID;
531eaf0ac3Slogwang mib[3] = pid;
54*22ce4affSfengbojiang if (sysctl(mib, nitems(mib), NULL, &len, NULL, 0) < 0)
551eaf0ac3Slogwang return (NULL);
561eaf0ac3Slogwang
571eaf0ac3Slogwang kipp = malloc(len);
581eaf0ac3Slogwang if (kipp == NULL)
591eaf0ac3Slogwang return (NULL);
601eaf0ac3Slogwang
61*22ce4affSfengbojiang if (sysctl(mib, nitems(mib), kipp, &len, NULL, 0) < 0)
621eaf0ac3Slogwang goto bad;
631eaf0ac3Slogwang if (len != sizeof(*kipp))
641eaf0ac3Slogwang goto bad;
651eaf0ac3Slogwang if (kipp->ki_structsize != sizeof(*kipp))
661eaf0ac3Slogwang goto bad;
671eaf0ac3Slogwang if (kipp->ki_pid != pid)
681eaf0ac3Slogwang goto bad;
691eaf0ac3Slogwang return (kipp);
701eaf0ac3Slogwang bad:
711eaf0ac3Slogwang free(kipp);
721eaf0ac3Slogwang return (NULL);
731eaf0ac3Slogwang }
74