[dragonfly.git] / sys / vfs / procfs / procfs_status.c

/*
 * Copyright (c) 1993 Jan-Simon Pendry
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Jan-Simon Pendry.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)procfs_status.c	8.4 (Berkeley) 6/15/94
 *
 * From:
 * $FreeBSD: src/sys/miscfs/procfs/procfs_status.c,v 1.20.2.4 2002/01/22 17:22:59 nectar Exp $
 * $DragonFly: src/sys/vfs/procfs/procfs_status.c,v 1.15 2007/02/19 01:14:24 corecode Exp $
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/malloc.h>
#include <sys/proc.h>
#include <sys/priv.h>
#include <sys/jail.h>
#include <sys/vnode.h>
#include <sys/tty.h>
#include <sys/resourcevar.h>
#include <vfs/procfs/procfs.h>

#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_param.h>
#include <sys/exec.h>

#define DOCHECK() do { if (ps >= psbuf+sizeof(psbuf)) goto bailout; } while (0)
int
procfs_dostatus(struct proc *curp, struct lwp *lp, struct pfsnode *pfs,
		struct uio *uio)
{
	struct proc *p = lp->lwp_proc;
	struct session *sess;
	struct tty *tp;
	struct ucred *cr;
	char *ps;
	char *sep;
	int pid, ppid, pgid, sid;
	size_t xlen;
	int i;
	int error;
	char psbuf[256];	/* XXX - conservative */

	if (uio->uio_rw != UIO_READ)
		return (EOPNOTSUPP);

	pid = p->p_pid;
	ppid = p->p_pptr ? p->p_pptr->p_pid : 0;
	pgid = p->p_pgrp->pg_id;
	sess = p->p_pgrp->pg_session;
	sid = sess->s_leader ? sess->s_leader->p_pid : 0;

/* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg 
                                euid ruid rgid,egid,groups[1 .. NGROUPS]
*/
	KASSERT(sizeof(psbuf) > MAXCOMLEN,
			("Too short buffer for new MAXCOMLEN"));

	ps = psbuf;
	bcopy(p->p_comm, ps, MAXCOMLEN);
	ps[MAXCOMLEN] = '\0';
	ps += strlen(ps);
	DOCHECK();
	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
	    " %d %d %d %d ", pid, ppid, pgid, sid);
	DOCHECK();
	if ((p->p_flags & P_CONTROLT) && (tp = sess->s_ttyp))
		ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
		    "%d,%d ", major(tp->t_dev), minor(tp->t_dev));
	else
		ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
		    "%d,%d ", -1, -1);
	DOCHECK();

	sep = "";
	if (sess->s_ttyvp) {
		ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "%sctty", sep);
		sep = ",";
		DOCHECK();
	}
	if (SESS_LEADER(p)) {
		ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "%ssldr", sep);
		sep = ",";
		DOCHECK();
	}
	if (*sep != ',') {
		ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "noflags");
		DOCHECK();
	}

	if (p->p_flags & P_SWAPPEDOUT) {
		ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
		    " -1,-1 -1,-1 -1,-1");
	} else {
		struct rusage ru;

		calcru_proc(p, &ru);
		ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
		    " %ld,%ld %ld,%ld %ld,%ld",
		    p->p_start.tv_sec,
		    p->p_start.tv_usec,
		    ru.ru_utime.tv_sec, ru.ru_utime.tv_usec,
		    ru.ru_stime.tv_sec, ru.ru_stime.tv_usec);
	}
	DOCHECK();

	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, " %s",
		(lp->lwp_wchan && lp->lwp_wmesg) ? lp->lwp_wmesg : "nochan");
	DOCHECK();

	cr = p->p_ucred;

	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, " %lu %lu %lu", 
		(u_long)cr->cr_uid,
		(u_long)p->p_ucred->cr_ruid,
		(u_long)p->p_ucred->cr_rgid);
	DOCHECK();

	/* egid (p->p_ucred->cr_svgid) is equal to cr_ngroups[0] 
	   see also getegid(2) in /sys/kern/kern_prot.c */

	for (i = 0; i < cr->cr_ngroups; i++) {
		ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
		    ",%lu", (u_long)cr->cr_groups[i]);
		DOCHECK();
	}

	if (p->p_ucred->cr_prison)
		ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
		    " %s", p->p_ucred->cr_prison->pr_host);
	else
		ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, " -");
	DOCHECK();
	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "\n");
	DOCHECK();

	xlen = ps - psbuf;
	xlen -= (size_t)uio->uio_offset;
	ps = psbuf + uio->uio_offset;
	xlen = szmin(xlen, uio->uio_resid);
	if (xlen == 0)
		error = 0;
	else
		error = uiomove_frombuf(ps, xlen, uio);

	return (error);

bailout:
	return (ENOMEM);
}

int
procfs_docmdline(struct proc *curp, struct lwp *lp, struct pfsnode *pfs,
		 struct uio *uio)
{
	struct proc *p = lp->lwp_proc;
	char *ps;
	int error;
	char *buf, *bp;
	struct ps_strings pstr;
	char **ps_argvstr;
	int i;
	size_t bytes_left, done;
	size_t buflen, xlen;

	if (uio->uio_rw != UIO_READ)
		return (EOPNOTSUPP);
	
	/*
	 * If we are using the ps/cmdline caching, use that.  Otherwise
	 * revert back to the old way which only implements full cmdline
	 * for the currept process and just p->p_comm for all other
	 * processes.
	 * Note that if the argv is no longer available, we deliberately
	 * don't fall back on p->p_comm or return an error: the authentic
	 * Linux behaviour is to return zero-length in this case.
	 */

	if (p->p_args &&
	    (ps_argsopen || (CHECKIO(curp, p) &&
	     (p->p_flags & P_INEXEC) == 0 &&
	     !p_trespass(curp->p_ucred, p->p_ucred)))
	 ) {
		bp = p->p_args->ar_args;
		buflen = p->p_args->ar_length;
		buf = 0;
	} else if (p != curp) {
		bp = p->p_comm;
		buflen = MAXCOMLEN;
		buf = 0;
	} else {
		buflen = 256;
		MALLOC(buf, char *, buflen + 1, M_TEMP, M_WAITOK);
		bp = buf;
		ps = buf;
		error = copyin((void*)PS_STRINGS, &pstr, sizeof(pstr));
		if (error) {
			FREE(buf, M_TEMP);
			return (error);
		}
		if (pstr.ps_nargvstr > ARG_MAX) {
			FREE(buf, M_TEMP);
			return (E2BIG);
		}
		MALLOC(ps_argvstr, char **, pstr.ps_nargvstr * sizeof(char *),
		    M_TEMP, M_WAITOK);
		error = copyin((void *)pstr.ps_argvstr, ps_argvstr,
		    pstr.ps_nargvstr * sizeof(char *));
		if (error) {
			FREE(ps_argvstr, M_TEMP);
			FREE(buf, M_TEMP);
			return (error);
		}
		bytes_left = buflen;
		for (i = 0; bytes_left && (i < pstr.ps_nargvstr); i++) {
			error = copyinstr(ps_argvstr[i], ps,
					  bytes_left, &done);
			/* If too long or malformed, just truncate */
			if (error) {
				error = 0;
				break;
			}
			ps += done;
			bytes_left -= done;
		}
		buflen = ps - buf;
		FREE(ps_argvstr, M_TEMP);
	}

	buflen -= (size_t)uio->uio_offset;
	ps = bp + (size_t)uio->uio_offset;
	xlen = szmin(buflen, uio->uio_resid);
	if (xlen == 0)
		error = 0;
	else
		error = uiomove_frombuf(bp, buflen, uio);
	if (buf)
		FREE(buf, M_TEMP);
	return (error);
}
Commit	Line	Data
984263bc MD	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	* $FreeBSD: src/sys/miscfs/procfs/procfs_status.c,v 1.20.2.4 2002/01/22 17:22:59 nectar Exp $
c7e98b2f	41	* $DragonFly: src/sys/vfs/procfs/procfs_status.c,v 1.15 2007/02/19 01:14:24 corecode Exp $
984263bc MD	42	*/
	43
	44	#include <sys/param.h>
	45	#include <sys/systm.h>
	46	#include <sys/malloc.h>
	47	#include <sys/proc.h>
75bda2d9	48	#include <sys/priv.h>
984263bc MD	49	#include <sys/jail.h>
	50	#include <sys/vnode.h>
	51	#include <sys/tty.h>
	52	#include <sys/resourcevar.h>
1f2de5d4	53	#include <vfs/procfs/procfs.h>
984263bc MD	54
	55	#include <vm/vm.h>
	56	#include <vm/pmap.h>
	57	#include <vm/vm_param.h>
	58	#include <sys/exec.h>
	59
	60	#define DOCHECK() do { if (ps >= psbuf+sizeof(psbuf)) goto bailout; } while (0)
	61	int
c7e98b2f	62	procfs_dostatus(struct proc curp, struct lwp lp, struct pfsnode *pfs,
ac424f9b	63	struct uio *uio)
984263bc	64	{
c7e98b2f	65	struct proc *p = lp->lwp_proc;
984263bc MD	66	struct session *sess;
	67	struct tty *tp;
	68	struct ucred *cr;
	69	char *ps;
	70	char *sep;
	71	int pid, ppid, pgid, sid;
e54488bb	72	size_t xlen;
984263bc	73	int i;
984263bc MD	74	int error;
	75	char psbuf[256]; /* XXX - conservative */
	76
	77	if (uio->uio_rw != UIO_READ)
	78	return (EOPNOTSUPP);
	79
	80	pid = p->p_pid;
	81	ppid = p->p_pptr ? p->p_pptr->p_pid : 0;
	82	pgid = p->p_pgrp->pg_id;
	83	sess = p->p_pgrp->pg_session;
	84	sid = sess->s_leader ? sess->s_leader->p_pid : 0;
	85
	86	/* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg
	87	euid ruid rgid,egid,groups[1 .. NGROUPS]
	88	*/
	89	KASSERT(sizeof(psbuf) > MAXCOMLEN,
	90	("Too short buffer for new MAXCOMLEN"));
	91
	92	ps = psbuf;
	93	bcopy(p->p_comm, ps, MAXCOMLEN);
	94	ps[MAXCOMLEN] = '\0';
	95	ps += strlen(ps);
	96	DOCHECK();
f8c7a42d	97	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
984263bc MD	98	" %d %d %d %d ", pid, ppid, pgid, sid);
984263bc MD	99	DOCHECK();
4643740a	100	if ((p->p_flags & P_CONTROLT) && (tp = sess->s_ttyp))
f8c7a42d	101	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
984263bc MD	102	"%d,%d ", major(tp->t_dev), minor(tp->t_dev));
984263bc MD	103	else
f8c7a42d	104	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
984263bc MD	105	"%d,%d ", -1, -1);
	106	DOCHECK();
	107
	108	sep = "";
	109	if (sess->s_ttyvp) {
f8c7a42d	110	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "%sctty", sep);
984263bc MD	111	sep = ",";
	112	DOCHECK();
	113	}
	114	if (SESS_LEADER(p)) {
f8c7a42d	115	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "%ssldr", sep);
984263bc MD	116	sep = ",";
	117	DOCHECK();
	118	}
	119	if (*sep != ',') {
f8c7a42d	120	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "noflags");
984263bc MD	121	DOCHECK();
	122	}
	123
4643740a	124	if (p->p_flags & P_SWAPPEDOUT) {
f8c7a42d	125	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
344ad853 MD	126	" -1,-1 -1,-1 -1,-1");
344ad853 MD	127	} else {
fde7ac71	128	struct rusage ru;
984263bc	129
fde7ac71	130	calcru_proc(p, &ru);
f8c7a42d	131	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
984263bc	132	" %ld,%ld %ld,%ld %ld,%ld",
d9fa5f67 SS	133	p->p_start.tv_sec,
d9fa5f67 SS	134	p->p_start.tv_usec,
fde7ac71 SS	135	ru.ru_utime.tv_sec, ru.ru_utime.tv_usec,
fde7ac71 SS	136	ru.ru_stime.tv_sec, ru.ru_stime.tv_usec);
344ad853	137	}
984263bc MD	138	DOCHECK();
984263bc MD	139
f8c7a42d	140	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, " %s",
08f2f1bb	141	(lp->lwp_wchan && lp->lwp_wmesg) ? lp->lwp_wmesg : "nochan");
984263bc MD	142	DOCHECK();
	143
	144	cr = p->p_ucred;
	145
f8c7a42d	146	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, " %lu %lu %lu",
984263bc	147	(u_long)cr->cr_uid,
41c20dac MD	148	(u_long)p->p_ucred->cr_ruid,
41c20dac MD	149	(u_long)p->p_ucred->cr_rgid);
984263bc MD	150	DOCHECK();
984263bc MD	151
41c20dac	152	/* egid (p->p_ucred->cr_svgid) is equal to cr_ngroups[0]
984263bc MD	153	see also getegid(2) in /sys/kern/kern_prot.c */
	154
	155	for (i = 0; i < cr->cr_ngroups; i++) {
f8c7a42d	156	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
984263bc MD	157	",%lu", (u_long)cr->cr_groups[i]);
	158	DOCHECK();
	159	}
	160
41c20dac	161	if (p->p_ucred->cr_prison)
f8c7a42d	162	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
41c20dac	163	" %s", p->p_ucred->cr_prison->pr_host);
984263bc	164	else
f8c7a42d	165	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, " -");
984263bc	166	DOCHECK();
f8c7a42d	167	ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "\n");
984263bc MD	168	DOCHECK();
	169
	170	xlen = ps - psbuf;
e54488bb	171	xlen -= (size_t)uio->uio_offset;
984263bc	172	ps = psbuf + uio->uio_offset;
e54488bb MD	173	xlen = szmin(xlen, uio->uio_resid);
e54488bb MD	174	if (xlen == 0)
984263bc MD	175	error = 0;
984263bc MD	176	else
aa0a27c8	177	error = uiomove_frombuf(ps, xlen, uio);
984263bc MD	178
	179	return (error);
	180
	181	bailout:
	182	return (ENOMEM);
	183	}
	184
	185	int
c7e98b2f	186	procfs_docmdline(struct proc curp, struct lwp lp, struct pfsnode *pfs,
ac424f9b	187	struct uio *uio)
984263bc	188	{
c7e98b2f	189	struct proc *p = lp->lwp_proc;
984263bc	190	char *ps;
984263bc MD	191	int error;
984263bc MD	192	char buf, bp;
984263bc	193	struct ps_strings pstr;
d80771bb	194	char **ps_argvstr;
984263bc MD	195	int i;
984263bc MD	196	size_t bytes_left, done;
e54488bb	197	size_t buflen, xlen;
984263bc MD	198
	199	if (uio->uio_rw != UIO_READ)
	200	return (EOPNOTSUPP);
	201
	202	/*
	203	* If we are using the ps/cmdline caching, use that. Otherwise
	204	* revert back to the old way which only implements full cmdline
	205	* for the currept process and just p->p_comm for all other
	206	* processes.
	207	* Note that if the argv is no longer available, we deliberately
	208	* don't fall back on p->p_comm or return an error: the authentic
	209	* Linux behaviour is to return zero-length in this case.
	210	*/
	211
	212	if (p->p_args &&
	213	(ps_argsopen \|\| (CHECKIO(curp, p) &&
4643740a MD	214	(p->p_flags & P_INEXEC) == 0 &&
4643740a MD	215	!p_trespass(curp->p_ucred, p->p_ucred)))
41c20dac	216	) {
984263bc MD	217	bp = p->p_args->ar_args;
	218	buflen = p->p_args->ar_length;
	219	buf = 0;
	220	} else if (p != curp) {
	221	bp = p->p_comm;
	222	buflen = MAXCOMLEN;
	223	buf = 0;
	224	} else {
	225	buflen = 256;
	226	MALLOC(buf, char *, buflen + 1, M_TEMP, M_WAITOK);
	227	bp = buf;
	228	ps = buf;
	229	error = copyin((void*)PS_STRINGS, &pstr, sizeof(pstr));
	230	if (error) {
	231	FREE(buf, M_TEMP);
	232	return (error);
	233	}
d80771bb JS	234	if (pstr.ps_nargvstr > ARG_MAX) {
	235	FREE(buf, M_TEMP);
	236	return (E2BIG);
	237	}
	238	MALLOC(ps_argvstr, char *, pstr.ps_nargvstr sizeof(char *),
	239	M_TEMP, M_WAITOK);
	240	error = copyin((void *)pstr.ps_argvstr, ps_argvstr,
	241	pstr.ps_nargvstr * sizeof(char *));
	242	if (error) {
	243	FREE(ps_argvstr, M_TEMP);
	244	FREE(buf, M_TEMP);
	245	return (error);
	246	}
984263bc MD	247	bytes_left = buflen;
984263bc MD	248	for (i = 0; bytes_left && (i < pstr.ps_nargvstr); i++) {
d80771bb	249	error = copyinstr(ps_argvstr[i], ps,
984263bc MD	250	bytes_left, &done);
	251	/* If too long or malformed, just truncate */
	252	if (error) {
	253	error = 0;
	254	break;
	255	}
	256	ps += done;
	257	bytes_left -= done;
	258	}
	259	buflen = ps - buf;
d80771bb	260	FREE(ps_argvstr, M_TEMP);
984263bc MD	261	}
984263bc MD	262
e54488bb MD	263	buflen -= (size_t)uio->uio_offset;
	264	ps = bp + (size_t)uio->uio_offset;
	265	xlen = szmin(buflen, uio->uio_resid);
	266	if (xlen == 0)
984263bc MD	267	error = 0;
984263bc MD	268	else
25e80b06	269	error = uiomove_frombuf(bp, buflen, uio);
984263bc MD	270	if (buf)
	271	FREE(buf, M_TEMP);
	272	return (error);
	273	}