Annotation of sys/miscfs/procfs/procfs_status.c, Revision 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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