Home | History | Annotate | Line # | Download | only in procfs
procfs_status.c revision 1.3 
      1 /*
      2  * Copyright (c) 1993 The Regents of the University of California.
      3  * Copyright (c) 1993 Jan-Simon Pendry
      4  * 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  * From:
     38  *	Id: procfs_status.c,v 4.1 1993/12/17 10:47:45 jsp Rel
     39  *
     40  *	$Id: procfs_status.c,v 1.3 1994/01/10 20:47:39 ws Exp $
     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 
     55 pfs_dostatus(curp, p, pfs, uio)
     56 	struct proc *curp;
     57 	struct proc *p;
     58 	struct pfsnode *pfs;
     59 	struct uio *uio;
     60 {
     61 	struct session *sess;
     62 	struct tty *tp;
     63 	struct ucred *cr;
     64 	char *ps;
     65 	char *sep;
     66 	int pid, ppid, pgid, sid;
     67 	int i;
     68 	int xlen;
     69 	int error;
     70 	char psbuf[256];		/* XXX - conservative */
     71 
     72 	if (uio->uio_rw != UIO_READ)
     73 		return (EOPNOTSUPP);
     74 
     75 	pid = p->p_pid;
     76 	ppid = p->p_pptr ? p->p_pptr->p_pid : 0,
     77 	pgid = p->p_pgrp->pg_id;
     78 	sess = p->p_pgrp->pg_session;
     79 	sid = sess->s_leader ? sess->s_leader->p_pid : 0;
     80 
     81 /* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg uid groups ... */
     82 
     83 	ps = psbuf;
     84 	bcopy(p->p_comm, ps, MAXCOMLEN);
     85 	ps[MAXCOMLEN] = '\0';
     86 	ps += strlen(ps);
     87 	ps += sprintf(ps, " %d %d %d %d ", pid, ppid, pgid, sid);
     88 
     89 	if ((p->p_flag&SCTTY) && (tp = sess->s_ttyp))
     90 		ps += sprintf(ps, "%d,%d ", major(tp->t_dev), minor(tp->t_dev));
     91 	else
     92 		ps += sprintf(ps, "%d,%d ", -1, -1);
     93 
     94 	sep = "";
     95 	if (sess->s_ttyvp) {
     96 		ps += sprintf(ps, "%sctty", sep);
     97 		sep = ",";
     98 	}
     99 	if (SESS_LEADER(p)) {
    100 		ps += sprintf(ps, "%ssldr", sep);
    101 		sep = ",";
    102 	}
    103 	if (*sep != ',')
    104 		ps += sprintf(ps, "noflags");
    105 
    106 	if (p->p_stat & SLOAD)
    107 		ps += sprintf(ps, " %d %d",
    108 			p->p_stats->p_start.tv_sec,
    109 			p->p_stats->p_start.tv_usec);
    110 	else
    111 		ps += sprintf(ps, " -1 -1");
    112 
    113 	ps += sprintf(ps, " %d %d %d %d",
    114 		p->p_utime.tv_sec,
    115 		p->p_utime.tv_usec,
    116 		p->p_stime.tv_sec,
    117 		p->p_stime.tv_usec);
    118 
    119 	ps += sprintf(ps, " %s",
    120 		(p->p_wchan && p->p_wmesg) ? p->p_wmesg : "nochan");
    121 
    122 	cr = p->p_ucred;
    123 
    124 	ps += sprintf(ps, " %d %d", cr->cr_uid, cr->cr_gid);
    125 	for (i = 1; i < cr->cr_ngroups; i++)
    126 		ps += sprintf(ps, " %d", cr->cr_groups[i]);
    127 	ps += sprintf(ps, "\n");
    128 
    129 	xlen = ps - psbuf;
    130 	xlen -= uio->uio_offset;
    131 	ps = psbuf + uio->uio_offset;
    132 	xlen = imin(xlen, uio->uio_resid);
    133 	if (xlen <= 0)
    134 		error = 0;
    135 	else
    136 		error = uiomove(ps, xlen, uio);
    137 
    138 	return (error);
    139 }
    140