usr/src/cmd/ttymon/tmglobal.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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  26 /*        All Rights Reserved   */
  27
  28 #include <stdio.h>
  29 #include <poll.h>
  30 #include <signal.h>
  31 #include <sys/resource.h>
  32 #include <sac.h>
  33 #include "tmstruct.h"
  34 #include "ttymon.h"
  35
  36 /*
  37  *      global fd and fp
  38  */
  39 FILE    *Logfp = NULL;          /* for log file                 */
  40 int     Lckfd;                  /* for pid file                 */
  41 int     Sfd, Pfd;               /* for sacpipe and pmpipe       */
  42 int     PCpipe[2];              /* pipe between Parent & Children */
  43 #ifdef  DEBUG
  44 FILE    *Debugfp = NULL;        /* for debug file               */
  45 #endif
  46
  47 char    State = PM_STARTING;    /* current state                        */
  48 char    *Istate;                /* initial state                        */
  49 char    *Tag;                   /* port monitor tag                     */
  50 int     Maxfiles;               /* Max number of open files             */
  51 int     Maxfds;                 /* Max no of devices ttymon can monitor */
  52
  53 int     Reread_flag = FALSE;    /* reread pmtab flag                    */
  54
  55 int     Retry;                  /* retry open_device flag               */
  56
  57 struct  pmtab *PMtab = NULL;    /* head pointer to pmtab linked list    */
  58 int     Nentries = 0;           /* # of entries in pmtab linked list    */
  59
  60 struct  Gdef Gdef[MAXDEFS];     /* array to hold entries in /etc/ttydefs */
  61 int     Ndefs = 0;              /* highest index to Gdef that was used   */
  62 long    Mtime = 0;              /* last modification time of ttydefs     */
  63
  64 struct pollfd *Pollp;           /* ptr to an array of poll struct       */
  65 int     Npollfd;                /* size of the pollfd array              */
  66
  67 struct Gdef DEFAULT = {         /* default terminal settings    */
  68         "default",
  69         "9600",
  70         "9600 sane",
  71         0,
  72         /*
  73          * next label is set to 4800 so we can start searching ttydefs.
  74          * if 4800 is not in ttydefs, we will loop back to use DEFAULT
  75          */
  76         "4800"
  77 };
  78
  79 uid_t   Uucp_uid = 5;           /* owner's uid for bi-directional ports */
  80 gid_t   Tty_gid = 7;            /* group id for all tty devices         */
  81
  82 /*
  83  * Nlocked -    number of ports that are either locked or have active
  84  *              sessions not under this ttymon.
  85  */
  86 int     Nlocked = 0;
  87
  88 /* original rlimit value */
  89 struct  rlimit  Rlimit;
  90
  91 /*
  92  * places to remember original signal dispositions and masks
  93  */
  94
  95 sigset_t        Origmask;               /* original signal mask */
  96 struct  sigaction       Sigalrm;        /* SIGALRM */
  97 struct  sigaction       Sigcld;         /* SIGCLD */
  98 struct  sigaction       Sigint;         /* SIGINT */
  99 struct  sigaction       Sigpoll;        /* SIGPOLL */
 100 struct  sigaction       Sigquit;        /* SIGQUIT */
 101 struct  sigaction       Sigterm;        /* SIGTERM */
 102 #ifdef  DEBUG
 103 struct  sigaction       Sigusr1;        /* SIGUSR1 */
 104 struct  sigaction       Sigusr2;        /* SIGUSR2 */
 105 #endif
 106
 107 struct strbuf *peek_ptr;
 108
 109 int Logmaxsz = 1000000; /* Log Max Size */
 110
 111 int Splflag = 0; /* serialize Log file manipulation */