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
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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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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 1.13 2007/01/01 22:51:18 corecode 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 += ksnprintf(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 += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
100 "%d,%d ", major(tp->t_dev), minor(tp->t_dev));
102 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
108 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "%sctty", sep);
112 if (SESS_LEADER(p)) {
113 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "%ssldr", sep);
118 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "noflags");
122 if (p->p_flag & P_SWAPPEDOUT) {
123 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
124 " -1,-1 -1,-1 -1,-1");
129 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
130 " %ld,%ld %ld,%ld %ld,%ld",
133 ru.ru_utime.tv_sec, ru.ru_utime.tv_usec,
134 ru.ru_stime.tv_sec, ru.ru_stime.tv_usec);
138 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, " %s",
139 (p->p_wchan && p->p_wmesg) ? p->p_wmesg : "nochan");
144 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, " %lu %lu %lu",
146 (u_long)p->p_ucred->cr_ruid,
147 (u_long)p->p_ucred->cr_rgid);
150 /* egid (p->p_ucred->cr_svgid) is equal to cr_ngroups[0]
151 see also getegid(2) in /sys/kern/kern_prot.c */
153 for (i = 0; i < cr->cr_ngroups; i++) {
154 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
155 ",%lu", (u_long)cr->cr_groups[i]);
159 if (p->p_ucred->cr_prison)
160 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps,
161 " %s", p->p_ucred->cr_prison->pr_host);
163 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, " -");
165 ps += ksnprintf(ps, psbuf + sizeof(psbuf) - ps, "\n");
169 xlen -= uio->uio_offset;
170 ps = psbuf + uio->uio_offset;
171 xlen = imin(xlen, uio->uio_resid);
175 error = uiomove_frombuf(ps, xlen, uio);
184 procfs_docmdline(struct proc *curp, struct proc *p, struct pfsnode *pfs,
192 struct ps_strings pstr;
195 size_t bytes_left, done;
197 if (uio->uio_rw != UIO_READ)
201 * If we are using the ps/cmdline caching, use that. Otherwise
202 * revert back to the old way which only implements full cmdline
203 * for the currept process and just p->p_comm for all other
205 * Note that if the argv is no longer available, we deliberately
206 * don't fall back on p->p_comm or return an error: the authentic
207 * Linux behaviour is to return zero-length in this case.
211 (ps_argsopen || (CHECKIO(curp, p) &&
212 (p->p_flag & P_INEXEC) == 0 && !p_trespass(curp->p_ucred, p->p_ucred)))
214 bp = p->p_args->ar_args;
215 buflen = p->p_args->ar_length;
217 } else if (p != curp) {
223 MALLOC(buf, char *, buflen + 1, M_TEMP, M_WAITOK);
226 error = copyin((void*)PS_STRINGS, &pstr, sizeof(pstr));
231 if (pstr.ps_nargvstr > ARG_MAX) {
235 MALLOC(ps_argvstr, char **, pstr.ps_nargvstr * sizeof(char *),
237 error = copyin((void *)pstr.ps_argvstr, ps_argvstr,
238 pstr.ps_nargvstr * sizeof(char *));
240 FREE(ps_argvstr, M_TEMP);
245 for (i = 0; bytes_left && (i < pstr.ps_nargvstr); i++) {
246 error = copyinstr(ps_argvstr[i], ps,
248 /* If too long or malformed, just truncate */
257 FREE(ps_argvstr, M_TEMP);
260 buflen -= uio->uio_offset;
261 ps = bp + uio->uio_offset;
262 xlen = min(buflen, uio->uio_resid);
266 error = uiomove_frombuf(bp, buflen, uio);