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.
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15 * notice, this list of conditions and the following disclaimer in the
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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.
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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 1.2 2003/06/17 04:28:42 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 <miscfs/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(curp, p, pfs, uio)
72 int pid, ppid, pgid, sid;
76 char psbuf[256]; /* XXX - conservative */
78 if (uio->uio_rw != UIO_READ)
82 ppid = p->p_pptr ? p->p_pptr->p_pid : 0;
83 pgid = p->p_pgrp->pg_id;
84 sess = p->p_pgrp->pg_session;
85 sid = sess->s_leader ? sess->s_leader->p_pid : 0;
87 /* comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg
88 euid ruid rgid,egid,groups[1 .. NGROUPS]
90 KASSERT(sizeof(psbuf) > MAXCOMLEN,
91 ("Too short buffer for new MAXCOMLEN"));
94 bcopy(p->p_comm, ps, MAXCOMLEN);
98 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
99 " %d %d %d %d ", pid, ppid, pgid, sid);
101 if ((p->p_flag&P_CONTROLT) && (tp = sess->s_ttyp))
102 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
103 "%d,%d ", major(tp->t_dev), minor(tp->t_dev));
105 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
111 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "%sctty", sep);
115 if (SESS_LEADER(p)) {
116 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "%ssldr", sep);
121 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "noflags");
125 if (p->p_flag & P_INMEM) {
126 struct timeval ut, st;
128 calcru(p, &ut, &st, (struct timeval *) NULL);
129 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
130 " %ld,%ld %ld,%ld %ld,%ld",
131 p->p_stats->p_start.tv_sec,
132 p->p_stats->p_start.tv_usec,
133 ut.tv_sec, ut.tv_usec,
134 st.tv_sec, st.tv_usec);
136 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
137 " -1,-1 -1,-1 -1,-1");
140 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, " %s",
141 (p->p_wchan && p->p_wmesg) ? p->p_wmesg : "nochan");
146 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, " %lu %lu %lu",
148 (u_long)p->p_cred->p_ruid,
149 (u_long)p->p_cred->p_rgid);
152 /* egid (p->p_cred->p_svgid) is equal to cr_ngroups[0]
153 see also getegid(2) in /sys/kern/kern_prot.c */
155 for (i = 0; i < cr->cr_ngroups; i++) {
156 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
157 ",%lu", (u_long)cr->cr_groups[i]);
162 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps,
163 " %s", p->p_prison->pr_host);
165 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, " -");
167 ps += snprintf(ps, psbuf + sizeof(psbuf) - ps, "\n");
171 xlen -= uio->uio_offset;
172 ps = psbuf + uio->uio_offset;
173 xlen = imin(xlen, uio->uio_resid);
177 error = uiomove(ps, xlen, uio);
186 procfs_docmdline(curp, p, pfs, uio)
197 struct ps_strings pstr;
199 size_t bytes_left, done;
201 if (uio->uio_rw != UIO_READ)
205 * If we are using the ps/cmdline caching, use that. Otherwise
206 * revert back to the old way which only implements full cmdline
207 * for the currept process and just p->p_comm for all other
209 * Note that if the argv is no longer available, we deliberately
210 * don't fall back on p->p_comm or return an error: the authentic
211 * Linux behaviour is to return zero-length in this case.
215 (ps_argsopen || (CHECKIO(curp, p) &&
216 (p->p_flag & P_INEXEC) == 0 &&
217 !p_trespass(curp, p)))) {
218 bp = p->p_args->ar_args;
219 buflen = p->p_args->ar_length;
221 } else if (p != curp) {
227 MALLOC(buf, char *, buflen + 1, M_TEMP, M_WAITOK);
230 error = copyin((void*)PS_STRINGS, &pstr, sizeof(pstr));
236 for (i = 0; bytes_left && (i < pstr.ps_nargvstr); i++) {
237 error = copyinstr(pstr.ps_argvstr[i], ps,
239 /* If too long or malformed, just truncate */
250 buflen -= uio->uio_offset;
251 ps = bp + uio->uio_offset;
252 xlen = min(buflen, uio->uio_resid);
256 error = uiomove(ps, xlen, uio);