/* ========================================================================
 * Copyright 1988-2006 University of Washington
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * 
 * ========================================================================
 */

/*
 * Program:	Environment routines -- TOPS-20 version
 *
 * Author:	Mark Crispin
 *		Networks and Distributed Computing
 *		Computing & Communications
 *		University of Washington
 *		Administration Building, AG-44
 *		Seattle, WA  98195
 *		Internet: MRC@CAC.Washington.EDU
 *
 * Date:	1 August 1988
 * Last Edited:	30 August 2006
 */


/* Dedication:
 * This file is dedicated with affection to the TOPS-20 operating system, which
 * set standards for user and programmer friendliness that have still not been
 * equaled by more `modern' operating systems.
 * Wasureru mon ka!!!!
 */

/* c-client environment parameters */

static char *myUserName = NIL;	/* user name */
static char *myHomeDir = NIL;	/* home directory name */
static char *myLocalHost = NIL;	/* local host name */
static char *myNewsrc = NIL;	/* newsrc file name */
static short no822tztext = NIL;	/* disable RFC [2]822 timezone text */


#include "pmatch.c"		/* include wildcard pattern matcher */

/* Environment manipulate parameters
 * Accepts: function code
 *	    function-dependent value
 * Returns: function-dependent return value
 */

void *env_parameters (long function,void *value)
{
  void *ret = NIL;
  switch ((int) function) {
  case SET_USERNAME:
    if (myUserName) fs_give ((void **) &myUserName);
    myUserName = cpystr ((char *) value);
  case GET_USERNAME:
    ret = (void *) myUserName;
    break;
  case SET_HOMEDIR:
    if (myHomeDir) fs_give ((void **) &myHomeDir);
    myHomeDir = cpystr ((char *) value);
  case GET_HOMEDIR:
    ret = (void *) myHomeDir;
    break;
  case SET_LOCALHOST:
    if (myLocalHost) fs_give ((void **) &myLocalHost);
    myLocalHost = cpystr ((char *) value);
  case GET_LOCALHOST:
    ret = (void *) myLocalHost;
    break;
  case SET_NEWSRC:
    if (myNewsrc) fs_give ((void **) &myNewsrc);
    myNewsrc = cpystr ((char *) value);
  case GET_NEWSRC:
    ret = (void *) myNewsrc;
    break;
  case SET_DISABLE822TZTEXT:
    no822tztext = value ? T : NIL;
  case GET_DISABLE822TZTEXT:
    ret = (void *) (no822tztext ? VOIDT : NIL);
    break;
  }
  return ret;
}

/* Write current time in RFC 822 format
 * Accepts: destination string
 */

void rfc822_date (char *date)
{
  char *s;
  int argblk[4];
  argblk[1] = (int) (date-1);
  argblk[2] = -1;		/* time now */
  argblk[3] = OT_822;		/* want RFC [2]822 format */
  jsys (ODTIM,argblk);
				/* suppress time zone text if desired */
  if (no822tztext && (s = strstr (date," ("))) *s = NIL;
}


/* Write current time in internal format
 * Accepts: destination string
 */

void internal_date (char *date)
{
  int argblk[5];
  argblk[1] = (int) (date-1);
  argblk[2] = -1;		/* time now */
  argblk[3] = OT_4YR;		/* output in 4-digit year format */
  jsys (ODTIM,argblk);
  argblk[2] = ' ';		/* delimit with space */
  jsys (BOUT,argblk);
  argblk[2] = -1;		/* time now */
  argblk[4] = 0;		/* no flags */
  jsys (ODCNV,argblk);		/* get time zone */
  argblk[2] = ((argblk[4] & 077000000) >> 18) * -100;
				/* add an hour if summer time */
  if (argblk[4] & IC_ADS) argblk[2] += 100;
  argblk[3] = 0340005000012;
  jsys (NOUT,argblk);
}

/* Return my user name
 * Accepts: pointer to optional flags
 * Returns: my user name
 */

char *myusername_full (unsigned long *flags)
{
  if (!myUserName) {		/* get user name if don't have it yet */
    char tmp[MAILTMPLEN];
    int argblk[5],i;
    jsys (GJINF,argblk);	/* get job poop */
    if (!(i = argblk[1])) {	/* remember user number */
      if (flags) *flags = MU_NOTLOGGEDIN;
      return "SYSTEM";		/* not logged in */
    }
    argblk[1] = (int) (tmp-1);	/* destination */
    argblk[2] = i;		/* user number */
    jsys (DIRST,argblk);	/* get user name string */
    myUserName = cpystr (tmp);	/* copy user name */
    argblk[1] = 0;		/* no flags */
    argblk[2] = i;		/* user number */
    argblk[3] = 0;		/* no stepping */
    jsys (RCDIR,argblk);	/* get home directory */
    argblk[1] = (int) (tmp-1);	/* destination */
    argblk[2] = argblk[3];	/* home directory number */
    jsys (DIRST,argblk);	/* get home directory string */
    myHomeDir = cpystr (tmp);	/* copy home directory */
    if (!myNewsrc) {		/* set news file name if not defined */
      sprintf (tmp,"%sNEWSRC",myhomedir ());
      myNewsrc = cpystr (tmp);
    }
    if (flags) *flags = MU_LOGGEDIN;
  }
  return myUserName;
}

/* Return my local host name
 * Returns: my local host name
 */

char *mylocalhost ()
{
  if (!myLocalHost) {		/* initialize if first time */
    char tmp[MAILTMPLEN];
    int argblk[5];
    argblk[1] = _GTHNS;		/* convert number to string */
    argblk[2] = (int) (tmp-1);
    argblk[3] = -1;		/* want local host */
    if (!jsys (GTHST,argblk)) strcpy (tmp,"LOCAL");
    myLocalHost = cpystr (tmp);
  }
  return myLocalHost;
}


/* Return my home directory name
 * Returns: my home directory name
 */

char *myhomedir ()
{
  if (!myHomeDir) myusername ();/* initialize if first time */
  return myHomeDir ? myHomeDir : "";
}


/* Determine default prototype stream to user
 * Accepts: type (NIL for create, T for append)
 * Returns: default prototype stream
 */

MAILSTREAM *default_proto (long type)
{
  return NIL;			/* no default prototype */
}

/* Emulator for BSD syslog() routine
 * Accepts: priority
 *	    message
 *	    parameters
 */

void syslog (int priority,const char *message,...)
{
}


/* Emulator for BSD openlog() routine
 * Accepts: identity
 *	    options
 *	    facility
 */

void openlog (const char *ident,int logopt,int facility)
{
}