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    Length: 7197 (0x1c1d)
    Types: TextFile
    Names: »initialize.uts«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─⟦this⟧ »EUUGD11/euug-87hel/sec1/elm/src/initialize.uts« 

TextFile

From hpccc!mcgregor@hplabs.ARPA Fri May  9 16:05:10 1986
Received: from hplabs.ARPA by hpldat ; Fri, 9 May 86 16:05:01 pdt
Message-Id: <8605092305.AA00689@hpldat>
Received: by hplabs.ARPA ; Fri, 9 May 86 16:01:29 pdt
From: Scott McGregor <hpccc!mcgregor@hplabs.ARPA>
To: taylor@hplabs
Date: Fri, 9 May 86 15:23:16 PDT
Subject: initialize.c
X-Mailer: msg [version 3.3a]

/**		initialize.c		**/

/***** Initialize - read in all the defaults etc etc 
       (C) Copyright 1985 Dave Taylor
*****/

#include "headers.h"

#ifdef BSD
#  include <sgtty.h>
#else
#  include <termio.h>
#endif

#include <pwd.h>

#ifdef BSD
#  include <sys/time.h>
#else
#  include <time.h>
#endif

#include <signal.h>
#include <ctype.h>
#include <errno.h>

#ifdef BSD
#undef tolower
#endif


extern int errno;		/* system error number on failure */

char *error_name(), *error_description();

char *expand_logname(), *getenv(), *getlogin();

initialize(InitScreen_to)
int InitScreen_to;
{
	struct passwd *pass, *getpwnam();

	register int i;
	int      quit_signal(), term_signal(), ill_signal(),
		 fpe_signal(),  bus_signal(),  segv_signal(),
	         alarm_signal();
	char     buffer[SLEN], *cp;
	
	userid  = getuid();
	groupid = getgid();	

	strcpy(home,((cp = getenv("HOME")) == NULL)? "" : cp);
	strcpy(shell,((cp = getenv("SHELL")) == NULL)? "" : cp);

	if (debug) {		/* setup for dprintf statements! */
	  char filename[SLEN];
	  sprintf(filename, "%s/%s", home, DEBUG);
	  if ((debugfile = fopen(filename, "w")) == NULL) {
	    debug = 0;	/* otherwise 'leave' will try to log! */
	    leave(fprintf(stderr,"Could not open file %s for debug output!\n",
		  filename));
	  }
	  if (InitScreen_to) {
		  InitScreen();
	  }
	  chown(filename, userid, groupid); /* file owned by user */

	  fprintf(debugfile, "Debug output of the MSG program.  Version %s\n\n",
		  VERSION);
	}
#ifndef UTS
	signal(SIGINT,  SIG_IGN);
	signal(SIGQUIT, quit_signal);		/* Quit signal 	            */
	signal(SIGTERM, term_signal); 		/* Terminate signal         */
	signal(SIGILL,  ill_signal);		/* Illegal instruction      */
	signal(SIGFPE,  fpe_signal);		/* Floating point exception */
	signal(SIGBUS,  bus_signal);		/* Bus error  		    */
	signal(SIGSEGV, segv_signal);		/* Segmentation Violation   */
#endif
	signal(SIGALRM, alarm_signal);		/* Process Timer Alarm	    */

	if (isa3270()) {
	  isatube++;
	  dprint0(1, "** We're using a 3270 tube!! **\n");
	}

#ifndef UTS
	get_connections();	      /* who do we talk to directly?? */
#endif
	open_domain_file();		/* if we got it, we want it!  */

	get_term_chars();
	
	gethostname(hostname, sizeof(hostname));
	if ((cp = getlogin()) == NULL)
	  cuserid(username);
	else
	  strcpy(username, cp);

	/* now let's get the full username.. */

	if ((pass = getpwnam(username)) == NULL) {
	  error("Couldn't read password entry??");
	  strcpy(full_username, username);
	}
	else {
	  for (i=0; pass->pw_gecos[i] != '\0' && pass->pw_gecos[i] != ',';
	       i++)
	      if (pass->pw_gecos[i] == '&') {
	        full_username[i] = '\0';
	        strcat(full_username, expand_logname());
	        i = strlen(full_username) - 2;
	      }
	      else
	        full_username[i] = pass->pw_gecos[i];
	  full_username[i] = '\0'; 
	}

	if ((cp = getenv("EDITOR")) == NULL)
	  strcpy(editor,default_editor);
	else
	  strcpy(editor, cp);

	if (! mail_only) {
	  mailbox[0] = '\0';
	  strcpy(prefixchars, "> "); 	/* default message prefix */
	}

	read_rc_file();		/* reading the .msgrc next... */

	/** now try to expand the specified filename... **/

	if (strlen(infile) > 0) {
	  (void) expand_filename(infile);
	  if ((errno = can_access(infile, READ_ACCESS))) {
	    dprint2(1,"Error: given file %s as mailbox - unreadable (%s)!\n", 
		     infile, error_name(errno));
	    fprintf(stderr,"Can't open mailbox '%s' for reading!\n", infile);
	    exit(1);
	  }
	}

	/** check to see if the user has defined a LINES or COLUMNS
	    value different to that in the termcap entry (for
	    windowing systems, of course!) **/

	if ((cp = getenv("LINES")) != NULL && isdigit(*cp)) {
	  sscanf(cp, "%d", &LINES);
	  LINES -= 1;	/* kludge for HP Window system? ... */
	}

	if ((cp = getenv("COLUMNS")) != NULL && isdigit(*cp))
	  sscanf(cp, "%d", &COLUMNS);

	/** fix the shell if needed **/

	if (shell[0] != '/') {
	   sprintf(buffer, "/bin/%s", shell);
	   strcpy(shell, buffer);
	}

	if (! mail_only) {
	  mailbox_defined = (mailbox[0] != '\0'); 

	  /* get the cursor control keys... */

	  if ((cp = return_value_of("ku")) == NULL || strlen(cp) != 2)
	    cursor_control = FALSE;
	  else {
	    strcpy(up, cp);
	    if ((cp = return_value_of("kd")) == NULL || strlen(cp) != 2)
	      cursor_control = FALSE;
	    else {
	      strcpy(down, cp);
	      cursor_control = TRUE;
	      transmit_functions(ON);
	    }
	  }

	  strcpy(start_highlight, "->");
	  end_highlight[0] = '\0';

	  if (!arrow_cursor) {	/* try to use inverse bar instead */
	    if ((cp = return_value_of("so")) != NULL) {
	      strcpy(start_highlight, cp);
	      if ((cp = return_value_of("se")) == NULL)
	        strcpy(start_highlight, "->");
	      else {
	        strcpy(end_highlight, cp);
	        has_highlighting = TRUE;
	      }
	    }
	  }
	}

	if (read_aliases)
  	  read_alias_files();

	if (! mail_only) {
	  if (mini_menu)
	    headers_per_page = LINES - 13;
	  else
	    headers_per_page = LINES -  8;	/* 5 more headers! */

	  newmbox(1,FALSE, TRUE);	/* read in the mailbox! */
	}

	init_findnode();	/* set up the path alias stuff */

	dprint0(2,"\n-- end of initialization phase --\n");

	dprint3(2,"\thostname = %s\n\tusername = %s\n\tfull_username = \"%s\"\n",
	         hostname, username, full_username);

	dprint3(2,"\thome = %s\n\teditor = %s\n\tmailbox = %s\n",
		 home, editor, mailbox);

	dprint3(2,"\tinfile = %s\n\tfolder-dir = %s\n\tprintout = \"%s\"\n",
		 infile, folders, printout);
	
	dprint3(2,"\tsavefile = %s\n\tprefix = \"%s\"\n\tshell = %s\n",
		savefile, prefixchars, shell);
	
	dprint0(1,"-- beginning execution phase --\n\n");
}

get_term_chars()
{
	/** This routine sucks out the special terminal characters
	    ERASE and KILL for use in the input routine.  The meaning 
            of the characters are (dare I say it?) fairly obvious... **/

#ifdef BSD
	struct sgttyb term_buffer;

# define TCGETA	TIOCGETP

#else 
	struct termio term_buffer;
#endif

	if (ioctl(STANDARD_INPUT, TCGETA, &term_buffer) == -1) {
	  dprint1(1,"Error: %s encountered on ioctl call (get_term_chars)\n", 
		   error_name(errno));
	  /* set to defaults for terminal driver */
	  backspace = BACKSPACE;
	  kill_line = ctrl('U');
	}
	else {
#ifdef BSD
	  backspace = term_buffer.sg_erase;
	  kill_line = term_buffer.sg_kill;
#else
	  backspace = term_buffer.c_cc[VERASE];
	  kill_line = term_buffer.c_cc[VKILL];
#endif
	}
}

char *expand_logname()
{
	/** Return logname in a nice format (for expanding "&" in the
	    /etc/passwd file) **/

	static char buffer[SLEN];
	register int i;

	if (strlen(username) == 0)
	  buffer[0] = '\0';
	else {
	  buffer[0] = toupper(username[0]);

	  for (i=1; username[i] != '\0'; i++)
	    buffer[i] = tolower(username[i]);

	  buffer[i] = '\0';
	}

	return( (char *) buffer);	
}