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procfs_status.c revision 1.18 
      1 /*	$NetBSD: procfs_status.c,v 1.18 2002/11/07 08:18:34 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1993 Jan-Simon Pendry
      5  * Copyright (c) 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * Jan-Simon Pendry.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Berkeley and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  *
     39  *	@(#)procfs_status.c	8.4 (Berkeley) 6/15/94
     40  */
     41 
     42 #include <sys/cdefs.h>
     43 __KERNEL_RCSID(0, "$NetBSD: procfs_status.c,v 1.18 2002/11/07 08:18:34 thorpej Exp $");
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 #include <sys/time.h>
     48 #include <sys/kernel.h>
     49 #include <sys/proc.h>
     50 #include <sys/vnode.h>
     51 #include <sys/ioctl.h>
     52 #include <sys/tty.h>
     53 #include <sys/resource.h>
     54 #include <sys/resourcevar.h>
     55 #include <miscfs/procfs/procfs.h>
     56 
     57 int
     58 procfs_dostatus(curp, p, pfs, uio)
     59 	struct proc *curp;
     60 	struct proc *p;
     61 	struct pfsnode *pfs;
     62 	struct uio *uio;
     63 {
     64 	struct session *sess;
     65 	struct tty *tp;
     66 	struct ucred *cr;
     67 	char *ps;
     68 	char *sep;
     69 	int pid, ppid, pgid, sid;
     70 	u_int i;
     71 	int xlen;
     72 	int error;
     73 	char psbuf[256+MAXHOSTNAMELEN];		/* XXX - conservative */
     74 
     75 	if (uio->uio_rw != UIO_READ)
     76 		return (EOPNOTSUPP);
     77 
     78 	pid = p->p_pid;
     79 	ppid = p->p_pptr ? p->p_pptr->p_pid : 0,
     80 	pgid = p->p_pgrp->pg_id;
     81 	sess = p->p_pgrp->pg_session;
     82 	sid = sess->s_sid;
     83 
     84 /* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg uid gid groups ... */
     85 
     86 	ps = psbuf;
     87 	memcpy(ps, p->p_comm, MAXCOMLEN);
     88 	ps[MAXCOMLEN] = '\0';
     89 	ps += strlen(ps);
     90 	ps += sprintf(ps, " %d %d %d %d ", pid, ppid, pgid, sid);
     91 
     92 	if ((p->p_flag&P_CONTROLT) && (tp = sess->s_ttyp))
     93 		ps += sprintf(ps, "%d,%d ", major(tp->t_dev),
     94 		    minor(tp->t_dev));
     95 	else
     96 		ps += sprintf(ps, "%d,%d ", -1, -1);
     97 
     98 	sep = "";
     99 	if (sess->s_ttyvp) {
    100 		ps += sprintf(ps, "%sctty", sep);
    101 		sep = ",";
    102 	}
    103 	if (SESS_LEADER(p)) {
    104 		ps += sprintf(ps, "%ssldr", sep);
    105 		sep = ",";
    106 	}
    107 	if (*sep != ',')
    108 		ps += sprintf(ps, "noflags");
    109 
    110 	if (p->p_flag & P_INMEM)
    111 		ps += sprintf(ps, " %ld,%ld",
    112 			p->p_stats->p_start.tv_sec,
    113 			p->p_stats->p_start.tv_usec);
    114 	else
    115 		ps += sprintf(ps, " -1,-1");
    116 
    117 	{
    118 		struct timeval ut, st;
    119 
    120 		calcru(p, &ut, &st, (void *) 0);
    121 		ps += sprintf(ps, " %ld,%ld %ld,%ld",
    122 			ut.tv_sec,
    123 			ut.tv_usec,
    124 			st.tv_sec,
    125 			st.tv_usec);
    126 	}
    127 
    128 	ps += sprintf(ps, " %s",
    129 	    (p->p_wchan && p->p_wmesg) ? p->p_wmesg : "nochan");
    130 
    131 	cr = p->p_ucred;
    132 
    133 	ps += sprintf(ps, " %d", cr->cr_uid);
    134 	ps += sprintf(ps, " %d", cr->cr_gid);
    135 	for (i = 0; i < cr->cr_ngroups; i++)
    136 		ps += sprintf(ps, ",%d", cr->cr_groups[i]);
    137 	ps += sprintf(ps, "\n");
    138 
    139 	xlen = ps - psbuf;
    140 	xlen -= uio->uio_offset;
    141 	ps = psbuf + uio->uio_offset;
    142 	xlen = imin(xlen, uio->uio_resid);
    143 	if (xlen <= 0)
    144 		error = 0;
    145 	else
    146 		error = uiomove(ps, xlen, uio);
    147 
    148 	return (error);
    149 }
    150