common.h

早期freebsd实现

#   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)