2 * Copyright (c) 1993 Jan-Simon Pendry
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
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.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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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
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34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * @(#)procfs_status.c 8.4 (Berkeley) 6/15/94
40 * $FreeBSD: src/sys/miscfs/procfs/procfs_status.c,v 1.20.2.4 2002/01/22 17:22:59 nectar Exp $
41 * $DragonFly: src/sys/vfs/procfs/procfs_status.c,v 1.9 2005/01/29 08:34:00 dillon Exp $
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/malloc.h>
49 #include <sys/vnode.h>
51 #include <sys/resourcevar.h>
52 #include <vfs/procfs/procfs.h>
56 #include <vm/vm_param.h>
59 #define DOCHECK() do { if (ps >= psbuf+sizeof(psbuf)) goto bailout; } while (0)
61 procfs_dostatus(struct proc *curp, struct proc *p, struct pfsnode *pfs,
69 int pid, ppid, pgid, sid;
73 char psbuf[256]; /* XXX - conservative */
75 if (uio->uio_rw != UIO_READ)
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_leader ? sess->s_leader->p_pid : 0;
84 /* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg
85 euid ruid rgid,egid,groups[1 .. NGROUPS]
87 KASSERT(sizeof(psbuf) > MAXCOMLEN,
88 ("Too short buffer for new MAXCOMLEN"));
91 bcopy(p->p_comm, ps, MAXCOMLEN);
95 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
96 " %d %d %d %d ", pid, ppid, pgid, sid);
98 if ((p->p_flag&P_CONTROLT) && (tp = sess->s_ttyp))
99 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
100 "%d,%d ", major(tp->t_dev), minor(tp->t_dev));
102 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
108 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "%sctty", sep);
112 if (SESS_LEADER(p)) {
113 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "%ssldr", sep);
118 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "noflags");
122 if (p->p_flag & P_INMEM) {
123 struct timeval ut, st;
125 calcru(p, &ut, &st, (struct timeval *) NULL);
126 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
127 " %ld,%ld %ld,%ld %ld,%ld",
128 p->p_thread ? p->p_thread->td_start.tv_sec : 0,
129 p->p_thread ? p->p_thread->td_start.tv_usec : 0,
130 ut.tv_sec, ut.tv_usec,
131 st.tv_sec, st.tv_usec);
133 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
134 " -1,-1 -1,-1 -1,-1");
137 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, " %s",
138 (p->p_wchan && p->p_wmesg) ? p->p_wmesg : "nochan");
143 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, " %lu %lu %lu",
145 (u_long)p->p_ucred->cr_ruid,
146 (u_long)p->p_ucred->cr_rgid);
149 /* egid (p->p_ucred->cr_svgid) is equal to cr_ngroups[0]
150 see also getegid(2) in /sys/kern/kern_prot.c */
152 for (i = 0; i < cr->cr_ngroups; i++) {
153 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
154 ",%lu", (u_long)cr->cr_groups[i]);
158 if (p->p_ucred->cr_prison)
159 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
160 " %s", p->p_ucred->cr_prison->pr_host);
162 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, " -");
164 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "\n");
168 xlen -= uio->uio_offset;
169 ps = psbuf + uio->uio_offset;
170 xlen = imin(xlen, uio->uio_resid);
174 error = uiomove_frombuf(ps, xlen, uio);
183 procfs_docmdline(struct proc *curp, struct proc *p, struct pfsnode *pfs,
191 struct ps_strings pstr;
194 size_t bytes_left, done;
196 if (uio->uio_rw != UIO_READ)
200 * If we are using the ps/cmdline caching, use that. Otherwise
201 * revert back to the old way which only implements full cmdline
202 * for the currept process and just p->p_comm for all other
204 * Note that if the argv is no longer available, we deliberately
205 * don't fall back on p->p_comm or return an error: the authentic
206 * Linux behaviour is to return zero-length in this case.
210 (ps_argsopen || (CHECKIO(curp, p) &&
211 (p->p_flag & P_INEXEC) == 0 && !p_trespass(curp->p_ucred, p->p_ucred)))
213 bp = p->p_args->ar_args;
214 buflen = p->p_args->ar_length;
216 } else if (p != curp) {
222 MALLOC(buf, char *, buflen + 1, M_TEMP, M_WAITOK);
225 error = copyin((void*)PS_STRINGS, &pstr, sizeof(pstr));
230 if (pstr.ps_nargvstr > ARG_MAX) {
234 MALLOC(ps_argvstr, char **, pstr.ps_nargvstr * sizeof(char *),
236 error = copyin((void *)pstr.ps_argvstr, ps_argvstr,
237 pstr.ps_nargvstr * sizeof(char *));
239 FREE(ps_argvstr, M_TEMP);
244 for (i = 0; bytes_left && (i < pstr.ps_nargvstr); i++) {
245 error = copyinstr(ps_argvstr[i], ps,
247 /* If too long or malformed, just truncate */
256 FREE(ps_argvstr, M_TEMP);
259 buflen -= uio->uio_offset;
260 ps = bp + uio->uio_offset;
261 xlen = min(buflen, uio->uio_resid);
265 error = uiomove_frombuf(bp, buflen, uio);