kernel - Major signal path adjustments to fix races, tsleep race fixes, +more
[dragonfly.git] / sys / vfs / procfs / procfs_type.c
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1/*
2 * Copyright (c) 1993 Jan-Simon Pendry
3 * Copyright (c) 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * Jan-Simon Pendry.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * $FreeBSD: src/sys/miscfs/procfs/procfs_type.c,v 1.6 1999/08/28 00:46:56 peter Exp $
c7e98b2f 38 * $DragonFly: src/sys/vfs/procfs/procfs_type.c,v 1.5 2007/02/19 01:14:24 corecode Exp $
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39 */
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/proc.h>
44#include <sys/sysent.h>
45#include <sys/vnode.h>
1f2de5d4 46#include <vfs/procfs/procfs.h>
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47
48int
c7e98b2f 49procfs_dotype(struct proc *curp, struct lwp *lp, struct pfsnode *pfs,
ac424f9b 50 struct uio *uio)
984263bc 51{
c7e98b2f 52 struct proc *p = lp->lwp_proc;
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53 int len;
54 int error;
55 /*
56 * buffer for emulation type
57 */
58 char mebuffer[256];
59 char *none = "Not Available";
60
61 if (uio->uio_rw != UIO_READ)
62 return (EOPNOTSUPP);
63
64 if (uio->uio_offset != 0)
65 return (0);
66
67 if (p && p->p_sysent && p->p_sysent->sv_name) {
68 len = strlen(p->p_sysent->sv_name);
69 bcopy(p->p_sysent->sv_name, mebuffer, len);
70 } else {
71 len = strlen(none);
72 bcopy(none, mebuffer, len);
73 }
74 mebuffer[len++] = '\n';
75 error = uiomove(mebuffer, len, uio);
76 return error;
77}
78
79int
c7e98b2f 80procfs_validtype(struct lwp *lp)
984263bc 81{
4643740a 82 return ((lp->lwp_proc->p_flags & P_SYSTEM) == 0);
984263bc 83}