procfs_status.c revision 22975 
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 *	@(#)procfs_status.c	8.4 (Berkeley) 6/15/94
38 *
39 * From:
40 *	$Id$
41 */
42
43#include <sys/param.h>
44#include <sys/systm.h>
45#include <sys/time.h>
46#include <sys/kernel.h>
47#include <sys/proc.h>
48#include <sys/vnode.h>
49#include <sys/ioctl.h>
50#include <sys/tty.h>
51#include <sys/resource.h>
52#include <sys/resourcevar.h>
53#include <miscfs/procfs/procfs.h>
54
55int
56procfs_dostatus(curp, p, pfs, uio)
57	struct proc *curp;
58	struct proc *p;
59	struct pfsnode *pfs;
60	struct uio *uio;
61{
62	struct session *sess;
63	struct tty *tp;
64	struct ucred *cr;
65	char *ps;
66	char *sep;
67	int pid, ppid, pgid, sid;
68	int i;
69	int xlen;
70	int error;
71	char psbuf[256];		/* XXX - conservative */
72
73	if (uio->uio_rw != UIO_READ)
74		return (EOPNOTSUPP);
75
76	pid = p->p_pid;
77	ppid = p->p_pptr ? p->p_pptr->p_pid : 0,
78	pgid = p->p_pgrp->pg_id;
79	sess = p->p_pgrp->pg_session;
80	sid = sess->s_leader ? sess->s_leader->p_pid : 0;
81
82/* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg
83                                euid ruid rgid,egid,groups[1 .. NGROUPS]
84*/
85	ps = psbuf;
86	bcopy(p->p_comm, ps, MAXCOMLEN);
87	ps[MAXCOMLEN] = '\0';
88	ps += strlen(ps);
89	ps += sprintf(ps, " %d %d %d %d ", pid, ppid, pgid, sid);
90
91	if ((p->p_flag&P_CONTROLT) && (tp = sess->s_ttyp))
92		ps += sprintf(ps, "%d,%d ", major(tp->t_dev), minor(tp->t_dev));
93	else
94		ps += sprintf(ps, "%d,%d ", -1, -1);
95
96	sep = "";
97	if (sess->s_ttyvp) {
98		ps += sprintf(ps, "%sctty", sep);
99		sep = ",";
100	}
101	if (SESS_LEADER(p)) {
102		ps += sprintf(ps, "%ssldr", sep);
103		sep = ",";
104	}
105	if (*sep != ',')
106		ps += sprintf(ps, "noflags");
107
108	if (p->p_flag & P_INMEM)
109		ps += sprintf(ps, " %ld,%ld",
110			p->p_stats->p_start.tv_sec,
111			p->p_stats->p_start.tv_usec);
112	else
113		ps += sprintf(ps, " -1,-1");
114
115	{
116		struct timeval ut, st;
117
118		calcru(p, &ut, &st, (void *) 0);
119		ps += sprintf(ps, " %ld,%ld %ld,%ld",
120			ut.tv_sec,
121			ut.tv_usec,
122			st.tv_sec,
123			st.tv_usec);
124	}
125
126	ps += sprintf(ps, " %s",
127		(p->p_wchan && p->p_wmesg) ? p->p_wmesg : "nochan");
128
129	cr = p->p_ucred;
130
131	ps += sprintf(ps, " %ld %ld %ld",
132		      cr->cr_uid,               /* euid */
133		      p->p_cred->p_ruid,        /* ruid */
134		      p->p_cred->p_rgid);       /* rgid */
135
136	/* egid (p->p_cred->p_svgid) is equal to cr_ngroups[0]
137	   see also getegid(2) in /sys/kern/kern_prot.c */
138
139	for (i = 0; i < cr->cr_ngroups; i++)
140		ps += sprintf(ps, ",%ld", cr->cr_groups[i]);
141	ps += sprintf(ps, "\n");
142
143	xlen = ps - psbuf;
144	xlen -= uio->uio_offset;
145	ps = psbuf + uio->uio_offset;
146	xlen = imin(xlen, uio->uio_resid);
147	if (xlen <= 0)
148		error = 0;
149	else
150		error = uiomove(ps, xlen, uio);
151
152	return (error);
153}
154