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📄 NEWS(32.19 KB)
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📄 brac.c(2.18 KB)
📄 ch.c(18.37 KB)
📄 charset.c(17.3 KB)
📄 charset.h(717 B)
📄 cmd.h(4.42 KB)
📄 cmdbuf.c(32.21 KB)
📄 command.c(36.63 KB)
📄 compose.uni(10.17 KB)
📄 cvt.c(2.49 KB)
📄 decode.c(20.81 KB)
📄 edit.c(16.68 KB)
📄 filename.c(19.65 KB)
📄 fmt.uni(712 B)
📄 forwback.c(9.77 KB)
📄 funcs.h(17.56 KB)
📄 help.c(49.78 KB)
📄 ifile.c(7.39 KB)
📄 input.c(8.82 KB)
📄 jump.c(6.54 KB)
📄 less.h(12.74 KB)
📄 less.hlp(12.19 KB)
📄 less.nro(69.08 KB)
📄 lessecho.c(4.82 KB)
📄 lessecho.nro(1.5 KB)
📄 lesskey.c(17.99 KB)
📄 lesskey.h(813 B)
📄 lesskey.nro(9.15 KB)
📄 lglob.h(2.98 KB)
📄 line.c(28 KB)
📄 linenum.c(10.36 KB)
📄 lsystem.c(7.17 KB)
📄 main.c(8.07 KB)
📄 mark.c(8.28 KB)
📄 mkutable(2.75 KB)
📄 optfunc.c(13.61 KB)
📄 option.c(13.89 KB)
📄 option.h(2 KB)
📄 opttbl.c(17.14 KB)
📄 os.c(6.2 KB)
📄 output.c(13 KB)
📄 pattern.c(8.55 KB)
📄 pattern.h(1.54 KB)
📄 pckeys.h(898 B)
📄 position.c(5.13 KB)
📄 position.h(414 B)
📄 prompt.c(11.98 KB)
📄 regexp.c(27.74 KB)
📄 regexp.h(973 B)
📄 screen.c(53.03 KB)
📄 scrsize.c(3.06 KB)
📄 search.c(35.45 KB)
📄 signal.c(4.63 KB)
📄 tags.c(15.73 KB)
📄 ttyin.c(4.12 KB)
📄 ubin.uni(602 B)
📄 version.c(46.22 KB)
📄 wide.uni(3.52 KB)

Editing: main.c

/* $FreeBSD$ */
/*
 * Copyright (C) 1984-2020  Mark Nudelman
 *
 * You may distribute under the terms of either the GNU General Public
 * License or the Less License, as specified in the README file.
 *
 * For more information, see the README file.
 */

/*
 * Entry point, initialization, miscellaneous routines.
 */

#include "less.h"
#if MSDOS_COMPILER==WIN32C
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif

public char *	every_first_cmd = NULL;
public int	new_file;
public int	is_tty;
public IFILE	curr_ifile = NULL_IFILE;
public IFILE	old_ifile = NULL_IFILE;
public struct scrpos initial_scrpos;
public int	any_display = FALSE;
public POSITION	start_attnpos = NULL_POSITION;
public POSITION	end_attnpos = NULL_POSITION;
public int	wscroll;
public char *	progname;
public int	quitting;
public int	secure;
public int	dohelp;

#if LOGFILE
public int	logfile = -1;
public int	force_logfile = FALSE;
public char *	namelogfile = NULL;
#endif

#if EDITOR
public char *	editor;
public char *	editproto;
#endif

#if TAGS
extern char *	tags;
extern char *	tagoption;
extern int	jump_sline;
#endif

#ifdef WIN32
static char consoleTitle[256];
#endif

public int	one_screen;
extern int	less_is_more;
extern int	missing_cap;
extern int	know_dumb;
extern int	no_init;
extern int	pr_type;
extern int	quit_if_one_screen;
extern int	no_init;

/*
 * Entry point.
 */
int
main(argc, argv)
	int argc;
	char *argv[];
{
	IFILE ifile;
	char *s;

#ifdef __EMX__
	_response(&argc, &argv);
	_wildcard(&argc, &argv);
#endif

progname = *argv++;
	argc--;

secure = 0;
	s = lgetenv("LESSSECURE");
	if (!isnullenv(s))
		secure = 1;

#ifdef WIN32
	if (getenv("HOME") == NULL)
	{
		/*
		 * If there is no HOME environment variable,
		 * try the concatenation of HOMEDRIVE + HOMEPATH.
		 */
		char *drive = getenv("HOMEDRIVE");
		char *path  = getenv("HOMEPATH");
		if (drive != NULL && path != NULL)
		{
			char *env = (char *) ecalloc(strlen(drive) + 
					strlen(path) + 6, sizeof(char));
			strcpy(env, "HOME=");
			strcat(env, drive);
			strcat(env, path);
			putenv(env);
		}
	}
	GetConsoleTitle(consoleTitle, sizeof(consoleTitle)/sizeof(char));
#endif /* WIN32 */

/*
	 * Process command line arguments and LESS environment arguments.
	 * Command line arguments override environment arguments.
	 */
	is_tty = isatty(1);
	init_mark();
	init_cmds();
	get_term();
	init_charset();
	init_line();
	init_cmdhist();
	init_option();
	init_search();

/*
	 * If the name of the executable program is "more",
	 * act like LESS_IS_MORE is set.
	 */
	s = last_component(progname);
	if (strcmp(s, "more") == 0)
		less_is_more = 1;

init_prompt();

if (less_is_more)
		scan_option("-fG");

s = lgetenv(less_is_more ? "MORE" : "LESS");
	if (s != NULL)
		scan_option(save(s));

#define	isoptstring(s)	less_is_more   ? (((s)[0] == '-') && (s)[1] != '\0') : \
			(((s)[0] == '-' || (s)[0] == '+') && (s)[1] != '\0')
	while (argc > 0 && (isoptstring(*argv) || isoptpending()))
	{
		s = *argv++;
		argc--;
		if (strcmp(s, "--") == 0)
			break;
		scan_option(s);
	}
#undef isoptstring

if (isoptpending())
	{
		/*
		 * Last command line option was a flag requiring a
		 * following string, but there was no following string.
		 */
		nopendopt();
		quit(QUIT_OK);
	}

if (less_is_more)
		no_init = TRUE;

expand_cmd_tables();

#if EDITOR
	editor = lgetenv("VISUAL");
	if (editor == NULL || *editor == '\0')
	{
		editor = lgetenv("EDITOR");
		if (isnullenv(editor))
			editor = EDIT_PGM;
	}
	editproto = lgetenv("LESSEDIT");
	if (isnullenv(editproto))
		editproto = "%E ?lm+%lm. %g";
#endif

/*
	 * Call get_ifile with all the command line filenames
	 * to "register" them with the ifile system.
	 */
	ifile = NULL_IFILE;
	if (dohelp)
		ifile = get_ifile(FAKE_HELPFILE, ifile);
	while (argc-- > 0)
	{
#if (MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC)
		/*
		 * Because the "shell" doesn't expand filename patterns,
		 * treat each argument as a filename pattern rather than
		 * a single filename.  
		 * Expand the pattern and iterate over the expanded list.
		 */
		struct textlist tlist;
		char *filename;
		char *gfilename;
		char *qfilename;
		
		gfilename = lglob(*argv++);
		init_textlist(&tlist, gfilename);
		filename = NULL;
		while ((filename = forw_textlist(&tlist, filename)) != NULL)
		{
			qfilename = shell_unquote(filename);
			(void) get_ifile(qfilename, ifile);
			free(qfilename);
			ifile = prev_ifile(NULL_IFILE);
		}
		free(gfilename);
#else
		(void) get_ifile(*argv++, ifile);
		ifile = prev_ifile(NULL_IFILE);
#endif
	}
	/*
	 * Set up terminal, etc.
	 */
	if (!is_tty)
	{
		/*
		 * Output is not a tty.
		 * Just copy the input file(s) to output.
		 */
		SET_BINARY(1);
		if (edit_first() == 0)
		{
			do {
				cat_file();
			} while (edit_next(1) == 0);
		}
		quit(QUIT_OK);
	}

if (missing_cap && !know_dumb && !less_is_more)
		error("WARNING: terminal is not fully functional", NULL_PARG);
	open_getchr();
	raw_mode(1);
	init_signals(1);

/*
	 * Select the first file to examine.
	 */
#if TAGS
	if (tagoption != NULL || strcmp(tags, "-") == 0)
	{
		/*
		 * A -t option was given.
		 * Verify that no filenames were also given.
		 * Edit the file selected by the "tags" search,
		 * and search for the proper line in the file.
		 */
		if (nifile() > 0)
		{
			error("No filenames allowed with -t option", NULL_PARG);
			quit(QUIT_ERROR);
		}
		findtag(tagoption);
		if (edit_tagfile())  /* Edit file which contains the tag */
			quit(QUIT_ERROR);
		/*
		 * Search for the line which contains the tag.
		 * Set up initial_scrpos so we display that line.
		 */
		initial_scrpos.pos = tagsearch();
		if (initial_scrpos.pos == NULL_POSITION)
			quit(QUIT_ERROR);
		initial_scrpos.ln = jump_sline;
	} else
#endif
	{
		if (edit_first())
			quit(QUIT_ERROR);
		/*
		 * See if file fits on one screen to decide whether 
		 * to send terminal init. But don't need this 
		 * if -X (no_init) overrides this (see init()).
		 */
		if (quit_if_one_screen)
		{
			if (nifile() > 1) /* If more than one file, -F cannot be used */
				quit_if_one_screen = FALSE;
			else if (!no_init)
				one_screen = get_one_screen();
		}
	}

init();
	commands();
	quit(QUIT_OK);
	/*NOTREACHED*/
	return (0);
}

/*
 * Copy a string to a "safe" place
 * (that is, to a buffer allocated by calloc).
 */
	public char *
save(s)
	constant char *s;
{
	char *p;

p = (char *) ecalloc(strlen(s)+1, sizeof(char));
	strcpy(p, s);
	return (p);
}

/*
 * Allocate memory.
 * Like calloc(), but never returns an error (NULL).
 */
	public VOID_POINTER
ecalloc(count, size)
	int count;
	unsigned int size;
{
	VOID_POINTER p;

p = (VOID_POINTER) calloc(count, size);
	if (p != NULL)
		return (p);
	error("Cannot allocate memory", NULL_PARG);
	quit(QUIT_ERROR);
	/*NOTREACHED*/
	return (NULL);
}

/*
 * Skip leading spaces in a string.
 */
	public char *
skipsp(s)
	char *s;
{
	while (*s == ' ' || *s == '\t')	
		s++;
	return (s);
}

/*
 * See how many characters of two strings are identical.
 * If uppercase is true, the first string must begin with an uppercase
 * character; the remainder of the first string may be either case.
 */
	public int
sprefix(ps, s, uppercase)
	char *ps;
	char *s;
	int uppercase;
{
	int c;
	int sc;
	int len = 0;

for ( ;  *s != '\0';  s++, ps++)
	{
		c = *ps;
		if (uppercase)
		{
			if (len == 0 && ASCII_IS_LOWER(c))
				return (-1);
			if (ASCII_IS_UPPER(c))
				c = ASCII_TO_LOWER(c);
		}
		sc = *s;
		if (len > 0 && ASCII_IS_UPPER(sc))
			sc = ASCII_TO_LOWER(sc);
		if (c != sc)
			break;
		len++;
	}
	return (len);
}

/*
 * Exit the program.
 */
	public void
quit(status)
	int status;
{
	static int save_status;

/*
	 * Put cursor at bottom left corner, clear the line,
	 * reset the terminal modes, and exit.
	 */
	if (status < 0)
		status = save_status;
	else
		save_status = status;
	quitting = 1;
	edit((char*)NULL);
	save_cmdhist();
	if (any_display && is_tty)
		clear_bot();
	deinit();
	flush();
	raw_mode(0);
#if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC
	/* 
	 * If we don't close 2, we get some garbage from
	 * 2's buffer when it flushes automatically.
	 * I cannot track this one down  RB
	 * The same bug shows up if we use ^C^C to abort.
	 */
	close(2);
#endif
#ifdef WIN32
	SetConsoleTitle(consoleTitle);
#endif
	close_getchr();
	exit(status);
}

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Editing: main.c

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