usr/src/cmd/svc/startd/proc.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 /*
  30  * This is in a separate file because procfs.h cannot be included if
  31  * _FILE_OFFSET_BITES=64 is defined.
  32  */
  33
  34 #include <procfs.h>
  35 #include <sys/types.h>
  36 #include <sys/stat.h>
  37 #include <fcntl.h>
  38 #include <unistd.h>
  39
  40 ctid_t
  41 proc_get_ctid()
  42 {
  43         id_t ctid;
  44         int fd;
  45         ssize_t bytes;
  46         psinfo_t psinfo;
  47
  48         fd = open("/proc/self/psinfo", O_RDONLY);
  49         if (fd < 0)
  50                 return (-1);
  51
  52         bytes = read(fd, &psinfo, sizeof (psinfo));
  53         if (bytes == sizeof (psinfo))
  54                 ctid = psinfo.pr_contract;
  55         else
  56                 ctid = -1;
  57
  58         (void) close(fd);
  59         return (ctid);
  60 }