4.4BSD/usr/src/contrib/news/trn3/common.h
/* $Id: common.h,v 3.0 1992/02/23 21:25:39 davison Trn $
*/
/* This software is Copyright 1991 by Stan Barber.
*
* Permission is hereby granted to copy, reproduce, redistribute or otherwise
* use this software as long as: there is no monetary profit gained
* specifically from the use or reproduction of this software, it is not
* sold, rented, traded or otherwise marketed, and this copyright notice is
* included prominently in any copy made.
*
* The author make no claims as to the fitness or correctness of this software
* for any use whatsoever, and it is provided as is. Any use of this software
* is at the user's own risk.
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include "config.h" /* generated by installation script */
#ifndef isalnum
# define isalnum(c) (isalpha(c) || isdigit(c))
#endif
#include <errno.h>
#include <signal.h>
#ifdef I_SYS_IOCTL
#include <sys/ioctl.h>
#endif
#ifdef I_VFORK
# include <vfork.h>
#endif
#include <fcntl.h>
#ifdef I_TERMIO
# include <termio.h>
#else
# ifdef I_TERMIOS
# include <termios.h>
# else
# include <sgtty.h>
# endif
#endif
#ifdef HAS_GETPWENT
# include <pwd.h>
#endif
#ifdef I_PTEM
#include <sys/stream.h>
#include <sys/ptem.h>
#endif
#include <time.h>
#define BITSPERBYTE 8
#define LBUFLEN 1024 /* line buffer length */
/* (don't worry, .newsrc lines can exceed this) */
#define CBUFLEN 512 /* command buffer length */
#define PUSHSIZE 256
#define MAXFILENAME 512
#define LONGKEY 15 /* longest keyword: currently "posting-version" */
#define FINISHCMD 0177
/* some handy defs */
#define bool char
#define bool_int int
#define char_int int
#ifndef TRUE
#define TRUE (1)
#endif
#ifndef FALSE
#define FALSE (0)
#endif
#define Null(t) ((t)0)
#define Nullch Null(char*)
#define Nullfp Null(FILE*)
#define Ctl(ch) (ch & 037)
#define strNE(s1,s2) (strcmp(s1,s2))
#define strEQ(s1,s2) (!strcmp(s1,s2))
#define strnNE(s1,s2,l) (strncmp(s1,s2,l))
#define strnEQ(s1,s2,l) (!strncmp(s1,s2,l))
/* Things we can figure out ourselves */
#ifdef SIGTSTP
# define BERKELEY /* include job control signals? */
#endif
#if defined(FIONREAD) || defined(HAS_RDCHK) || defined(O_NDELAY)
# define PENDING
#endif
#ifdef EUNICE
# define LINKART /* add 1 level of possible indirection */
# define UNLINK(victim) while (!unlink(victim))
#else
# define UNLINK(victim) unlink(victim)
#endif
/* Valid substitutions for strings marked with % comment are:
* %a Current article number
* %A Full name of current article (%P/%c/%a)
* (if LINKART defined, is the name of the real article)
* %b Destination of a save command, a mailbox or command
* %B The byte offset to the beginning of the article for saves
* with or without the header
* %c Current newsgroup, directory form
* %C Current newsgroup, dot form
* %d %P/%c
* %D Old Distribution: line
* %e Extract program
* %E Extract destination directory
* %f Old From: line or Reply-To: line
* %F Newsgroups to followup to from Newsgroups: and Followup-To:
* %h Name of header file to pass to mail or news poster
* %H Host name (yours)
* %i Old Message-I.D.: line, with <>
* %I Inclusion indicator
* %l News administrator login name
* %L Login name (yours)
* %m The current mode of trn.
* %M Number of articles marked with M
* %n Newsgroups from source article
* %N Full name (yours)
* %o Organization (yours)
* %O Original working directory (where you ran trn from)
* %p Your private news directory (-d switch)
* %P Public news spool directory (NEWSSPOOL)
* %r Last reference (parent article id)
* %R New references list
* %s Subject, with all Re's and (nf)'s stripped off
* %S Subject, with one Re stripped off
* %t New To: line derived from From: and Reply-To (Internet always)
* %T New To: line derived from Path:
* %u Number of unread articles
* %U Number of unread articles disregarding current article
* %v Number of unselected articles disregarding current article
* %W The thread directory root
* %x News library directory, usually /usr/lib/news
* %X Rn library directory, usually %x/rn
* %z Size of current article in bytes.
* %Z Number of selected threads.
* %~ Home directory
* %. Directory containing . files
* %# count of articles saved in current command (from 1 to n)
* %$ current process number
* %{name} Environment variable "name". %{name-default} form allowed.
* %[name] Header line beginning with "Name: ", without "Name: "
* %"prompt"
* Print prompt and insert what is typed.
* %`command`
* Insert output of command.
* %(test_text=pattern?if_text:else_text)
* Substitute if_text if test_text matches pattern, otherwise
* substitute else_text. Use != for negated match.
* % substitutions are done on test_text, if_text, and else_text.
* (Note: %() only works if CONDSUB defined.)
* %digit Substitute the text matched by the nth bracket in the last
* pattern that had brackets. %0 matches the last bracket
* matched, in case you had alternatives.
*
* Put ^ in the middle to capitalize the first letter: %^C = Rec.humor
* Put _ in the middle to capitalize last component: %_c = net/Jokes
* Put \ in the middle to quote regexp and % characters in the result
* Put :FMT in the middle to format the result: %:-30.30t
*
* ~ interpretation in filename expansion happens after % expansion, so
* you could put ~%{NEWSLOGNAME-news} and it will expand correctly.
*/
/* *** System Dependent Stuff *** */
/* NOTE: many of these are defined in the config.h file */
/* name of organization */
#ifndef ORGNAME
# define ORGNAME "ACME Widget Company, Widget Falls, Southern North Dakota"
#endif
#ifndef MBOXCHAR
# define MBOXCHAR 'F' /* how to recognize a mailbox by 1st char */
#endif
#ifndef ROOTID
# define ROOTID 0 /* uid of superuser */
#endif
#ifdef NORMSIG
# define sigset signal
# define sigignore(sig) signal(sig,SIG_IGN)
#endif
#ifndef LOGDIRFIELD
# define LOGDIRFIELD 6 /* Which field (origin 1) is the */
/* login directory in /etc/passwd? */
/* (If it is not kept in passwd, */
/* but getpwnam() returns it, */
/* define the symbol HAS_GETPWENT) */
#endif
#ifndef GCOSFIELD
# define GCOSFIELD 5
#endif
#ifndef NEGCHAR
# define NEGCHAR '!'
#endif
/* Space conservation section */
/* To save D space, cut down size of NGMAX and VARYSIZE. */
#define NGMAX 100 /* number of newsgroups allowed on command line */
/* undefine ONLY symbol to disable "only" feature */
#define VARYSIZE 256 /* this makes a block 1024 bytes long in DECville */
/* (used by virtual array routines) */
/* Undefine any of the following features to save both I and D space */
/* In general, earlier ones are easier to get along without */
#define CUSTOMLINES /* include code for HIDELINE and PAGESTOP */
#define WORDERASE /* enable ^W to erase a word */
#define MAILCALL /* check periodically for mail */
#define CLEAREOL /* use clear to end-of-line instead of clear screen */
#define NOFIREWORKS /* keep whole screen from flashing on certain */
/* terminals such as older Televideos */
#define VERIFY /* echo the command they just typed */
#define HASHNG /* hash newsgroup lines for fast lookup-- */
/* linear search used if not defined */
#define CONDSUB /* allow %(cond?text:text) */
#define BACKTICK /* allow %`command` */
#define PROMPTTTY /* allow %"prompt" */
#define ULSMARTS /* catch _^H in text and do underlining */
#define TERMMOD /* allow terminal type modifier on switches */
#define BAUDMOD /* allow baudrate modifier on switches */
#define GETLOGIN /* use getlogin() routine as backup to environment */
/* variables USER or LOGNAME */
#define ORGFILE /* if organization begins with /, look up in file */
#define TILDENAME /* allow ~logname expansion */
#define SETENV /* allow command line environment variable setting */
#define MAKEDIR /* use our makedir() instead of shell script */
#define MEMHELP /* keep help messages in memory */
#define VERBOSE /* compile in more informative messages */
#define TERSE /* compile in shorter messages */
/* (Note: both VERBOSE and TERSE can be defined; -t
* sets terse mode. One or the other MUST be defined.
*/
#define ROTATION /* enable x, X and ^X commands to work */
#define DELBOGUS /* ask if bogus newsgroups should be deleted */
#define RELOCATE /* allow newsgroup rearranging */
#define ESCSUBS /* escape substitutions in multi-character commands */
#undef MCHASE /* unmark xrefed articles on m or M */
#define MUNGHEADER /* allow alternate header formatting via */
/* environment variable ALTHEADER (not impl) */
#define ASYNC_PARSE /* allow parsing headers asyncronously to reading */
/* used by MCHASE and MUNGHEADER */
#define FINDNEWNG /* check for new newsgroups on startup */
#define FASTNEW /* do optimizations on FINDNEWNG for faster startup */
/* (this optimization can make occasional mistakes */
/* if a group is removed and another group of the */
/* same length is added, and if no softpointers are */
/* affected by said change.) */
#define INNERSEARCH /* search command 'g' with article */
#define CATCHUP /* catchup command at newsgroup level */
#define NGSEARCH /* newsgroup pattern matching */
#define ONLY /* newsgroup restrictions by pattern */
#define KILLFILES /* automatic article killer files */
#define ARTSEARCH /* pattern searches among articles */
/* /, ?, ^N, ^P, k, K */
#define EDIT_DISTANCE /* Allow -G to specify a fuzzy 'go' command */
#undef METAMAIL /* use metamail to process mime articles */
/* some dependencies among options */
#ifndef ARTSEARCH
# undef KILLFILES
# undef INNERSEARCH
#endif
#ifndef SETUIDGID
# define eaccess access
#endif
#ifdef ONLY /* idiot lint doesn't grok #if */
# define NGSORONLY
#else
# ifdef NGSEARCH
# define NGSORONLY
# endif
#endif
#ifdef VERBOSE
# ifdef TERSE
# define IF(c) if (c)
# define ELSE else
# else
# define IF(c)
# define ELSE
# endif
#else /* !VERBOSE */
# ifndef TERSE
# define TERSE
# endif
# define IF(c) "IF" outside of VERBOSE???
# define ELSE "ELSE" outside of VERBOSE???
#endif
#ifdef DEBUG
# define assert(ex) {if (!(ex)){fprintf(stderr,"Assertion failed: file %s, line %d\n", __FILE__, __LINE__);sig_catcher(0);}}
#else
# define assert(ex) ;
#endif
/* If you're strapped for space use the help messages in shell scripts */
/* if {NG,ART,PAGER,SUBS}HELP is undefined, help messages are in memory */
#ifdef MEMHELP /* undef MEMHELP above to get them all as sh scripts */
# undef NGHELP
# undef ARTHELP
# undef PAGERHELP
# undef SUBSHELP
#else
# ifndef NGHELP /* % and ~ */
# define NGHELP "%X/ng.help"
# endif
# ifndef ARTHELP /* % and ~ */
# define ARTHELP "%X/art.help"
# endif
# ifndef PAGERHELP /* % and ~ */
# define PAGERHELP "%X/pager.help"
# endif
# ifndef SUBSHELP /* % and ~ */
# define SUBSHELP "%X/subs.help"
# endif
#endif
#define TCSIZE 512 /* capacity for termcap strings */
#ifdef EDIT_DISTANCE
# define MIN_DIST 7 /* Maximum error count for acceptable match */
#endif
/* Additional ideas:
* Make the do_newsgroup() routine a separate process.
* Keep .newsrc on disk instead of in memory.
* Overlays, if you have them.
* Get a bigger machine.
*/
/* End of Space Conservation Section */
/* More System Dependencies */
/* news library */
#ifndef NEWSLIB /* ~ and %l only ("~%l" is permissable) */
# define NEWSLIB "/usr/lib/news"
#endif
/* path to private executables */
#ifndef PRIVLIB /* ~, %x and %l only */
# define PRIVLIB "%x/trn"
#endif
/* system-wide RNINIT switches */
#ifndef GLOBINIT
# define GLOBINIT "%X/INIT"
#endif
/* where to find news files */
#ifndef NEWSSPOOL /* % and ~ */
# define NEWSSPOOL "/usr/spool/news"
#endif
#ifndef THREAD_DIR
# undef LONG_THREAD_NAMES
#endif
/* default characters to use in the selection menu */
#ifndef SELECTCHARS
# define SELECTCHARS "abdefgijlorstuvwxyz1234567890BCFGHIKVW"
#endif
/* file containing list of active newsgroups and max article numbers */
#ifndef ACTIVE /* % and ~ */
# define ACTIVE "%x/active"
#endif
#ifndef DBINIT
# define DBINIT "%W/db.init"
#endif
#ifdef USE_NNTP
# ifndef ACTIVE_TIMES
# define APPEND_UNSUB
# endif
#else
# ifdef USE_XTHREAD
# undef USE_XTHREAD
# endif
# ifdef USE_XOVER
# undef USE_XOVER
# endif
#endif
/* location of history file */
#ifndef ARTFILE /* % and ~ */
# define ARTFILE "%x/history"
#endif
/* command to setup a new .newsrc */
#ifndef NEWSETUP /* % and ~ */
# define NEWSETUP "newsetup"
#endif
/* command to display a list of un-subscribed-to newsgroups */
#ifndef NEWSGROUPS /* % and ~ */
# define NEWSGROUPS "newsgroups"
#endif
/* preferred shell for use in doshell routine */
/* ksh or sh would be okay here */
#ifndef PREFSHELL
# define PREFSHELL "/bin/csh"
#endif
/* path to fastest starting shell */
#ifndef SH
# define SH "/bin/sh"
#endif
/* default unshar'ing program */
#ifndef UNSHAR
# define UNSHAR "/bin/sh"
#endif
#ifdef METAMAIL
/* default MIME extraction program */
# ifndef MIMESTORE
# define MIMESTORE "/usr/local/bin/mh/mhn -store -auto -file "
# endif
/* default MIME show program */
# ifndef MIMESHOW
# define MIMESHOW "metamail -e -p -m \"trn %s\" %A"
# endif
#endif
/* path to default editor */
#ifndef DEFEDITOR
# define DEFEDITOR "/usr/ucb/vi"
#endif
/* location of macro file for trn and rn modes */
#ifndef TRNMACRO
# define TRNMACRO "%./.trnmac"
#endif
#ifndef RNMACRO
# define RNMACRO "%./.rnmac"
#endif
/* location of full name */
#ifndef FULLNAMEFILE
# ifndef PASSNAMES
# define FULLNAMEFILE "%./.fullname"
# endif
#endif
/* virtual array file name template */
#ifndef VARYNAME /* % and ~ */
# define VARYNAME "/tmp/rnvary.%$"
#endif
/* where to compile a new newsgroup list */
#ifndef RNEWNAME
# define RNEWNAME "/tmp/rnew.%$"
#endif
/* file to pass header to followup article poster */
#ifndef HEADNAME /* % and ~ */
# define HEADNAME "%./.rnhead"
/* or alternately #define HEADNAME "/tmp/rnhead.%$" */
#endif
#ifndef MAKEDIR
/* shell script to make n-deep subdirectories */
# ifndef DIRMAKER /* % and ~ */
# define DIRMAKER "%X/makedir"
# endif
#endif
/* location of newsrc file */
#ifndef RCNAME /* % and ~ */
# define RCNAME "%./.newsrc"
#endif
/* temporary newsrc file in case we crash while writing out */
#ifndef RCTNAME /* % and ~ */
# define RCTNAME "%./.newnewsrc"
#endif
/* newsrc file at the beginning of this session */
#ifndef RCBNAME /* % and ~ */
# define RCBNAME "%./.oldnewsrc"
#endif
/* if existent, contains process number of current or crashed trn */
#ifndef LOCKNAME /* % and ~ */
# define LOCKNAME "%./.rnlock"
#endif
/* information from last invocation of trn */
#ifndef LASTNAME /* % and ~ */
# define LASTNAME "%./.rnlast"
#endif
/* file with soft pointers into the active file */
#ifndef SOFTNAME /* % and ~ */
# define SOFTNAME "%./.rnsoft"
#endif
/* list of article numbers to mark as unread later (see M and Y cmmands) */
#ifndef RNDELNAME /* % and ~ */
# define RNDELNAME "%./.rndelay"
#endif
/* a motd-like file for trn */
#ifndef NEWSNEWSNAME /* % and ~ */
# define NEWSNEWSNAME "%X/newsnews"
#endif
/* command to send a reply */
#ifndef MAILPOSTER /* % and ~ */
# define MAILPOSTER "QUOTECHARS=%I Rnmail -h %h"
#endif
#ifdef INTERNET
# ifndef MAILHEADER /* % */
# ifdef CONDSUB
# define MAILHEADER "To: %t\nSubject: Re: %S\n%(%{REPLYTO}=^$?:Reply-To: %{REPLYTO}\n)Newsgroups: %n\nIn-Reply-To: %i\n%(%[references]!=^$?References\\: %[references]\n)Organization: %o\nCc: \nBcc: \n\n"
# else
# define MAILHEADER "To: %t\nSubject: Re: %S\nNewsgroups: %n\nIn-Reply-To: %i\nReferences: %[references]\nCc: \nBcc: \n\n"
# endif
# endif
#else
# ifndef MAILHEADER /* % */
# ifdef CONDSUB
# define MAILHEADER "To: %T\nSubject: %(%i=^$?:Re: %S\nNewsgroups: %n\nIn-Reply-To: %i)\n%(%[references]!=^$?References\\: %[references]\n)Organization: %o\nCc: \nBcc: \n\n"
# else
# define MAILHEADER "To: %T\nSubject: Re: %S\nNewsgroups: %n\nIn-Reply-To: %i\nReferences: %[references]\nCc: \nBcc: \n\n"
# endif
# endif
#endif
#ifndef YOUSAID /* % */
# define YOUSAID "In article %i you write:"
#endif
/* command to submit a followup article */
#ifndef NEWSPOSTER /* % and ~ */
# define NEWSPOSTER "QUOTECHARS=%I Pnews -h %h"
#endif
#ifndef NEWSHEADER /* % */
# ifdef CONDSUB
# define NEWSHEADER "%(%[followup-to]=^$?:X-ORIGINAL-NEWSGROUPS: %n\n)Newsgroups: %(%F=^$?%C:%F)\nSubject: %(%S=^$?%\"\n\nSubject: \":Re: %S)\nSummary: \nExpires: \n%(%R=^$?:References: %R\n)Sender: \nFollowup-To: \n%(%{REPLYTO}=^$?:Reply-To: %{REPLYTO}\n)Distribution: %(%i=^$?%\"Distribution: \":%D)\nOrganization: %o\nKeywords: %[keywords]\nCc: \n\n"
# else
# define NEWSHEADER "Newsgroups: %F\nSubject: Re: %S\nSummary: \nExpires: \nReferences: %R\nSender: \nFollowup-To: \nDistribution: %D\nOrganization: %o\nKeywords: %[keywords]\nCc: \n\n"
# endif
#endif
#ifndef ATTRIBUTION /* % */
# define ATTRIBUTION "In article %i %f writes:"
#endif
#ifndef PIPESAVER /* % */
# ifdef CONDSUB
# define PIPESAVER "%(%B=^0$?<%A:tail +%Bc %A |) %b"
# else
# define PIPESAVER "tail +%Bc %A | %b"
# endif
#endif
#ifndef EXSAVER
# define EXSAVER "tail +%Bc %A | %e"
#endif
#ifdef METAMAIL
# ifndef EXMIMESAVER
# define EXMIMESAVER "%e %A"
# endif
#endif
#ifndef NORMSAVER /* % and ~ */
# define NORMSAVER "%X/norm.saver %A %P %c %a %B %C \"%b\""
#endif
#ifndef MBOXSAVER /* % and ~ */
# ifndef ANCIENT_NEWS
# define MBOXSAVER "%X/mbox.saver %A %P %c %a %B %C \"%b\" \"From %t %`LANG= date`\""
# else
# ifdef CONDSUB
# define MBOXSAVER "%X/mbox.saver %A %P %c %a %B %C \"%b\" \"From %t %(%[date]=^\\(\\w*\\), \\(\\w*\\)-\\(\\w*\\)-\\(\\w*\\) \\([^ ]*\\)?%1 %3 %(%2=..?%2: %2) %5 19%4)\""
/* header munging with a vengeance */
# else
# define MBOXSAVER "%X/mbox.saver %A %P %c %a %B %C \"%b\" \"From %t %[posted]\""
# endif
# endif
#endif
#ifdef MKDIRS
# ifndef SAVEDIR /* % and ~ */
# define SAVEDIR "%p/%c"
# endif
# ifndef SAVENAME /* % */
# define SAVENAME "%a"
# endif
#else
# ifndef SAVEDIR /* % and ~ */
# define SAVEDIR "%p"
# endif
# ifndef SAVENAME /* % */
# define SAVENAME "%^C"
# endif
#endif
#ifndef KILLGLOBAL /* % and ~ */
# define KILLGLOBAL "%p/KILL"
#endif
#ifndef KILLLOCAL /* % and ~ */
# define KILLLOCAL "%p/%c/KILL"
#endif
/* how to cancel an article */
#ifndef CANCEL
# ifdef BNEWS
# define CANCEL "%x/inews -h < %h"
# else
# define CANCEL "inews -h < %h"
# endif
#endif
/* how to cancel an article, continued */
#ifndef CANCELHEADER
# define CANCELHEADER "Newsgroups: %n\nSubject: cancel\nControl: cancel %i\nDistribution: %D\n\n%i was cancelled from within trn.\n"
#endif
/* how to supersede an article */
#ifndef SUPERSEDEHEADER
# define SUPERSEDEHEADER "Newsgroups: %n\nSubject: %S\nSummary: %[summary]\nExpires: %[expires]\nReferences: %[references]\nSupersedes: %i\nSender: %[sender]\nFollowup-To: %[followup-to]\nDistribution: %D\nOrganization: %o\nKeywords: %[keywords]\n\n"
#endif
#ifndef LOCALTIMEFMT
# define LOCALTIMEFMT "%a %b %d %X %Z %Y"
#endif
/* where to find the mail file */
#ifndef MAILFILE
# define MAILFILE "/usr/spool/mail/%L"
#endif
/* how to open binary format files */
#ifndef FOPEN_RB
# define FOPEN_RB "r"
#endif
#ifndef FOPEN_WB
# define FOPEN_WB "w"
#endif
/* what to do with ansi prototypes -- '()' == ignore, 'x' == use */
#ifndef _
# ifdef __STDC__
# define _(x) x
# ifndef CONST
# define CONST const
# endif
# else
# define _(x) ()
# ifndef CONST
# define CONST
# endif
# endif
#endif
/* how many characters is a newline in a text file? */
#ifndef NL_SIZE
# define NL_SIZE 1
#endif
/* some important types */
typedef int NG_NUM; /* newsgroup number */
typedef long ART_NUM; /* article number */
typedef long ART_UNREAD; /* could be short to save space */
typedef long ART_POS; /* char position in article file */
typedef int ART_LINE; /* line position in article file */
typedef long ACT_POS; /* char position in active file */
typedef unsigned int MEM_SIZE; /* for passing to malloc */
/* *** end of the machine dependent stuff *** */
/* GLOBAL THINGS */
/* file statistics area */
EXT struct stat filestat;
/* various things of type char */
char *index();
char *rindex();
char *getenv();
char *strcat();
char *strcpy();
char *malloc();
char *realloc();
EXT char buf[LBUFLEN+1]; /* general purpose line buffer */
EXT char cmd_buf[CBUFLEN]; /* buffer for formatting system commands */
EXT char *indstr INIT(">"); /* indent for old article embedded in followup */
EXT char *cwd INIT(Nullch); /* current working directory */
EXT char *dfltcmd INIT(Nullch); /* 1st char is default command */
/* switches */
#ifdef DEBUG
EXT int debug INIT(0); /* -D */
# define DEB_COREDUMPSOK 2
# define DEB_HEADER 4
# define DEB_INTRP 8
# define DEB_NNTP 16
# define DEB_INNERSRCH 32
# define DEB_FILEXP 64
# define DEB_HASH 128
# define DEB_XREF_MARKER 256
# define DEB_CTLAREA_BITMAP 512
# define DEB_SOFT_POINTERS 1024
# define DEB_NEWSRC_LINE 2048
# define DEB_SEARCH_AHEAD 4096
# define DEB_CHECKPOINTING 8192
# define DEB_FEED_XREF 16384
#endif
#ifdef ARTSEARCH
EXT int scanon INIT(0); /* -S */
#endif
EXT bool use_threads INIT(THREAD_INIT); /* -x */
EXT int max_tree_lines INIT(6);
EXT char select_order[4] INIT("lms");
EXT int select_on INIT(SELECT_INIT); /* -X */
EXT char end_select INIT('Z');
EXT char page_select INIT('>');
EXT bool dont_filter_control INIT(FALSE); /* -j */
EXT bool mbox_always INIT(FALSE); /* -M */
EXT bool norm_always INIT(FALSE); /* -N */
EXT bool thread_always INIT(FALSE); /* -a */
EXT bool auto_arrow_macros INIT(TRUE); /* -B */
EXT bool breadth_first INIT(FALSE); /* -b */
EXT bool bkgnd_spinner INIT(FALSE); /* -B */
EXT bool novice_delays INIT(TRUE); /* +f */
EXT int olden_days INIT(FALSE); /* -o */
EXT bool auto_select_postings INIT(FALSE); /* -p */
EXT bool checkflag INIT(FALSE); /* -c */
EXT bool suppress_cn INIT(FALSE); /* -s */
EXT int countdown INIT(5); /* how many lines to list before invoking -s */
EXT bool muck_up_clear INIT(FALSE); /* -loco */
EXT bool erase_screen INIT(FALSE); /* -e */
EXT bool can_home INIT(FALSE);
#ifdef CLEAREOL
EXT bool can_home_clear INIT(FALSE); /* fancy -e */
#endif
EXT bool findlast INIT(FALSE); /* -r */
EXT bool typeahead INIT(FALSE); /* -T */
#ifdef EDIT_DISTANCE
EXT bool fuzzyGet INIT(FALSE); /* -G */
#endif
#ifdef VERBOSE
# ifdef TERSE
EXT bool verbose INIT(TRUE); /* +t */
# endif
#endif
EXT bool unbroken_subjects INIT(FALSE); /* -u */
#ifdef VERIFY
EXT bool verify INIT(FALSE); /* -v */
#endif
EXT bool quickstart INIT(FALSE); /* -q */
#define NOMARKING 0
#define STANDOUT 1
#define UNDERLINE 2
EXT int marking INIT(NOMARKING); /* -m */
EXT ART_LINE initlines INIT(0); /* -i */
EXT bool initlines_specified INIT(FALSE);
#ifdef APPEND_UNSUB
EXT bool append_unsub INIT(1); /* -I */
#else
EXT bool append_unsub INIT(0);
#endif
/* miscellania */
int fseek();
long atol(), ftell();
EXT bool in_ng INIT(FALSE); /* current state of trn */
EXT char mode INIT('i'); /* current state of trn */
EXT FILE *tmpfp INIT(Nullfp); /* scratch fp used for .rnlock, .rnlast, etc. */
EXT NG_NUM nextrcline INIT(0); /* 1st unused slot in rcline array */
/* startup to avoid checking twice in a row */
extern errno;
/* Factored strings */
EXT char nullstr[1] INIT("");
EXT char sh[] INIT(SH);
EXT char defeditor[] INIT(DEFEDITOR);
EXT char hforhelp[] INIT("Type h for help.\n");
#ifdef STRICTCR
EXT char badcr[] INIT("\nUnnecessary CR ignored.\n");
#endif
EXT char readerr[] INIT("rn read error");
EXT char unsubto[] INIT("\n\nUnsubscribed to newsgroup %s\n");
EXT char cantopen[] INIT("Can't open %s\n");
EXT char cantcreate[] INIT("Can't create %s\n");
EXT char cantrecreate[] INIT("Can't recreate %s -- restoring older version.\n");
#ifdef VERBOSE
EXT char nocd[] INIT("Can't chdir to directory %s\n");
#else
EXT char nocd[] INIT("Can't find %s\n");
#endif
#ifdef METAMAIL
EXT bool mime_article INIT(FALSE);
#endif
#ifdef NOLINEBUF
#define FLUSH ,fflush(stdout)
#else
#define FLUSH
#endif
#ifdef lint
#undef FLUSH
#define FLUSH
#undef putchar
#define putchar(c)
#endif
#define advise(str) fputs(str,stdout)
#define fatal_error(str) fputs(str,stderr), finalize(1)