98f03f9030
proctree_lock. linprocfs not locked pending response from informal maintainer. Reviewed by: jhb, -smp@
259 lines
7.0 KiB
C
259 lines
7.0 KiB
C
/*
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* Copyright (c) 1993 Jan-Simon Pendry
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)procfs_status.c 8.4 (Berkeley) 6/15/94
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*
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* From:
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/proc.h>
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#include <sys/jail.h>
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#include <sys/vnode.h>
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#include <sys/tty.h>
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#include <sys/resourcevar.h>
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#include <miscfs/procfs/procfs.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <vm/vm_param.h>
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#include <sys/exec.h>
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#define DOCHECK() do { if (ps >= psbuf+sizeof(psbuf)) goto bailout; } while (0)
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int
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procfs_dostatus(curp, p, pfs, uio)
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struct proc *curp;
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struct proc *p;
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struct pfsnode *pfs;
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struct uio *uio;
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{
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struct session *sess;
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struct tty *tp;
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struct ucred *cr;
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char *ps;
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char *sep;
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int pid, ppid, pgid, sid;
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int i;
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int xlen;
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int error;
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char psbuf[256]; /* XXX - conservative */
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if (uio->uio_rw != UIO_READ)
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return (EOPNOTSUPP);
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pid = p->p_pid;
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PROCTREE_LOCK(PT_SHARED);
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ppid = p->p_pptr ? p->p_pptr->p_pid : 0;
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PROCTREE_LOCK(PT_RELEASE);
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pgid = p->p_pgrp->pg_id;
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sess = p->p_pgrp->pg_session;
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sid = sess->s_leader ? sess->s_leader->p_pid : 0;
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/* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg
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euid ruid rgid,egid,groups[1 .. NGROUPS]
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*/
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KASSERT(sizeof(psbuf) > MAXCOMLEN,
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("Too short buffer for new MAXCOMLEN"));
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ps = psbuf;
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bcopy(p->p_comm, ps, MAXCOMLEN);
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ps[MAXCOMLEN] = '\0';
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ps += strlen(ps);
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DOCHECK();
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
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" %d %d %d %d ", pid, ppid, pgid, sid);
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DOCHECK();
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if ((p->p_flag&P_CONTROLT) && (tp = sess->s_ttyp))
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
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"%d,%d ", major(tp->t_dev), minor(tp->t_dev));
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else
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
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"%d,%d ", -1, -1);
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DOCHECK();
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sep = "";
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if (sess->s_ttyvp) {
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "%sctty", sep);
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sep = ",";
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DOCHECK();
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}
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if (SESS_LEADER(p)) {
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "%ssldr", sep);
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sep = ",";
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DOCHECK();
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}
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if (*sep != ',') {
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "noflags");
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DOCHECK();
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}
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if (p->p_flag & P_INMEM) {
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struct timeval ut, st;
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calcru(p, &ut, &st, (struct timeval *) NULL);
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
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" %ld,%ld %ld,%ld %ld,%ld",
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p->p_stats->p_start.tv_sec,
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p->p_stats->p_start.tv_usec,
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ut.tv_sec, ut.tv_usec,
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st.tv_sec, st.tv_usec);
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} else
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
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" -1,-1 -1,-1 -1,-1");
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DOCHECK();
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, " %s",
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(p->p_wchan && p->p_wmesg) ? p->p_wmesg : "nochan");
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DOCHECK();
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cr = p->p_ucred;
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, " %lu %lu %lu",
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(u_long)cr->cr_uid,
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(u_long)p->p_cred->p_ruid,
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(u_long)p->p_cred->p_rgid);
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DOCHECK();
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/* egid (p->p_cred->p_svgid) is equal to cr_ngroups[0]
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see also getegid(2) in /sys/kern/kern_prot.c */
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for (i = 0; i < cr->cr_ngroups; i++) {
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
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",%lu", (u_long)cr->cr_groups[i]);
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DOCHECK();
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}
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if (p->p_prison)
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
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" %s", p->p_prison->pr_host);
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else
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, " -");
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DOCHECK();
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ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "\n");
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DOCHECK();
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xlen = ps - psbuf;
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xlen -= uio->uio_offset;
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ps = psbuf + uio->uio_offset;
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xlen = imin(xlen, uio->uio_resid);
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if (xlen <= 0)
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error = 0;
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else
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error = uiomove(ps, xlen, uio);
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return (error);
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bailout:
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return (ENOMEM);
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}
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int
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procfs_docmdline(curp, p, pfs, uio)
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struct proc *curp;
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struct proc *p;
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struct pfsnode *pfs;
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struct uio *uio;
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{
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char *ps;
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int xlen;
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int error;
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char *buf, *bp;
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int buflen;
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struct ps_strings pstr;
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int i;
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size_t bytes_left, done;
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if (uio->uio_rw != UIO_READ)
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return (EOPNOTSUPP);
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/*
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* If we are using the ps/cmdline caching, use that. Otherwise
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* revert back to the old way which only implements full cmdline
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* for the currept process and just p->p_comm for all other
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* processes.
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* Note that if the argv is no longer available, we deliberately
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* don't fall back on p->p_comm or return an error: the authentic
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* Linux behaviour is to return zero-length in this case.
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*/
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if (p->p_args && (ps_argsopen || !p_can(curp, p, P_CAN_SEE, NULL))) {
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bp = p->p_args->ar_args;
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buflen = p->p_args->ar_length;
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buf = 0;
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} else if (p != curp) {
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bp = p->p_comm;
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buflen = MAXCOMLEN;
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buf = 0;
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} else {
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buflen = 256;
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MALLOC(buf, char *, buflen + 1, M_TEMP, M_WAITOK);
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bp = buf;
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ps = buf;
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error = copyin((void*)PS_STRINGS, &pstr, sizeof(pstr));
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if (error) {
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FREE(buf, M_TEMP);
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return (error);
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}
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bytes_left = buflen;
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for (i = 0; bytes_left && (i < pstr.ps_nargvstr); i++) {
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error = copyinstr(pstr.ps_argvstr[i], ps,
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bytes_left, &done);
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/* If too long or malformed, just truncate */
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if (error) {
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error = 0;
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break;
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}
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ps += done;
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bytes_left -= done;
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}
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buflen = ps - buf;
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}
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buflen -= uio->uio_offset;
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ps = bp + uio->uio_offset;
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xlen = min(buflen, uio->uio_resid);
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if (xlen <= 0)
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error = 0;
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else
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error = uiomove(ps, xlen, uio);
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if (buf)
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FREE(buf, M_TEMP);
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return (error);
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}
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