Annotation of sys/miscfs/procfs/procfs_status.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: procfs_status.c,v 1.10 2007/06/18 08:30:07 jasper Exp $ */
2: /* $NetBSD: procfs_status.c,v 1.11 1996/03/16 23:52:50 christos Exp $ */
3:
4: /*
5: * Copyright (c) 1993 Jan-Simon Pendry
6: * Copyright (c) 1993
7: * The Regents of the University of California. All rights reserved.
8: *
9: * This code is derived from software contributed to Berkeley by
10: * Jan-Simon Pendry.
11: *
12: * Redistribution and use in source and binary forms, with or without
13: * modification, are permitted provided that the following conditions
14: * are met:
15: * 1. Redistributions of source code must retain the above copyright
16: * notice, this list of conditions and the following disclaimer.
17: * 2. Redistributions in binary form must reproduce the above copyright
18: * notice, this list of conditions and the following disclaimer in the
19: * documentation and/or other materials provided with the distribution.
20: * 3. Neither the name of the University nor the names of its contributors
21: * may be used to endorse or promote products derived from this software
22: * without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34: * SUCH DAMAGE.
35: *
36: * @(#)procfs_status.c 8.4 (Berkeley) 6/15/94
37: */
38:
39: #include <sys/param.h>
40: #include <sys/systm.h>
41: #include <sys/time.h>
42: #include <sys/kernel.h>
43: #include <sys/malloc.h>
44: #include <sys/proc.h>
45: #include <sys/vnode.h>
46: #include <sys/ioctl.h>
47: #include <sys/tty.h>
48: #include <sys/resource.h>
49: #include <sys/resourcevar.h>
50: #include <miscfs/procfs/procfs.h>
51:
52: int procfs_stat_gen(struct proc *, char *s, int);
53:
54: #define COUNTORCAT(s, l, ps, n) do { \
55: if (s) \
56: strlcat(s, ps, l); \
57: else \
58: n += strlen(ps); \
59: } while (0)
60:
61: /* Generates:
62: * comm pid ppid pgid sid maj,min ctty,sldr start ut st wmsg uid gid groups
63: */
64: int
65: procfs_stat_gen(struct proc *p, char *s, int l)
66: {
67: struct session *sess;
68: struct tty *tp;
69: struct ucred *cr;
70: int pid, ppid, pgid, sid;
71: struct timeval ut, st;
72: char ps[256], *sep;
73: int i, n;
74:
75: pid = p->p_pid;
76: ppid = p->p_pptr ? p->p_pptr->p_pid : 0;
77: pgid = p->p_pgrp->pg_id;
78: sess = p->p_pgrp->pg_session;
79: sid = sess->s_leader ? sess->s_leader->p_pid : 0;
80:
81: n = 0;
82: if (s)
83: bzero(s, l);
84:
85: bcopy(p->p_comm, ps, MAXCOMLEN-1);
86: ps[MAXCOMLEN] = '\0';
87: COUNTORCAT(s, l, ps, n);
88:
89: (void) snprintf(ps, sizeof(ps), " %d %d %d %d ",
90: pid, ppid, pgid, sid);
91: COUNTORCAT(s, l, ps, n);
92:
93: if ((p->p_flag&P_CONTROLT) && (tp = sess->s_ttyp))
94: snprintf(ps, sizeof(ps), "%d,%d ",
95: major(tp->t_dev), minor(tp->t_dev));
96: else
97: snprintf(ps, sizeof(ps), "%d,%d ",
98: -1, -1);
99: COUNTORCAT(s, l, ps, n);
100:
101: sep = "";
102: if (sess->s_ttyvp) {
103: snprintf(ps, sizeof(ps), "%sctty", sep);
104: sep = ",";
105: COUNTORCAT(s, l, ps, n);
106: }
107:
108: if (SESS_LEADER(p)) {
109: snprintf(ps, sizeof(ps), "%ssldr", sep);
110: sep = ",";
111: COUNTORCAT(s, l, ps, n);
112: }
113:
114: if (*sep != ',') {
115: snprintf(ps, sizeof(ps), "noflags");
116: COUNTORCAT(s, l, ps, n);
117: }
118:
119: snprintf(ps, sizeof(ps), " %ld,%ld",
120: p->p_stats->p_start.tv_sec, p->p_stats->p_start.tv_usec);
121: COUNTORCAT(s, l, ps, n);
122:
123: calcru(p, &ut, &st, (void *) 0);
124: snprintf(ps, sizeof(ps), " %ld,%ld %ld,%ld",
125: ut.tv_sec, ut.tv_usec, st.tv_sec, st.tv_usec);
126: COUNTORCAT(s, l, ps, n);
127:
128: snprintf(ps, sizeof(ps), " %s",
129: (p->p_wchan && p->p_wmesg) ? p->p_wmesg : "nochan");
130: COUNTORCAT(s, l, ps, n);
131:
132: cr = p->p_ucred;
133:
134: snprintf(ps, sizeof(ps), " %u, %u", cr->cr_uid, cr->cr_gid);
135: COUNTORCAT(s, l, ps, n);
136: for (i = 0; i < cr->cr_ngroups; i++) {
137: snprintf(ps, sizeof(ps), ",%u", cr->cr_groups[i]);
138: COUNTORCAT(s, l, ps, n);
139: }
140:
141: snprintf(ps, sizeof(ps), "\n");
142: COUNTORCAT(s, l, ps, n);
143:
144: return (s != NULL ? strlen(s) + 1 : n + 1);
145: }
146:
147: int
148: procfs_dostatus(struct proc *curp, struct proc *p, struct pfsnode *pfs, struct uio *uio)
149: {
150: char *ps;
151: int error, len;
152:
153: if (uio->uio_rw != UIO_READ)
154: return (EOPNOTSUPP);
155:
156: len = procfs_stat_gen(p, NULL, 0);
157: ps = malloc(len, M_TEMP, M_WAITOK);
158: len = procfs_stat_gen(p, ps, len);
159:
160: if (len <= uio->uio_offset)
161: error = 0;
162: else {
163: len -= uio->uio_offset;
164: len = imin(len, uio->uio_resid);
165: error = uiomove(ps + uio->uio_offset, len, uio);
166: }
167:
168: free(ps, M_TEMP);
169: return (error);
170: }
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