src/usr.bin/less/main.c - diff

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Diff for /src/usr.bin/less/main.c between version 1.1.1.1 and 1.1.1.2

version 1.1.1.1, 1996/09/21 05:39:41

version 1.1.1.2, 2003/04/13 18:21:21

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* Redistribution and use in source and binary forms, with or without

* You may distribute under the terms of either the GNU General Public

* modification, are permitted provided that the following conditions

* License or the Less License, as specified in the README file.

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice in the documentation and/or other materials provided with

* the distribution.

* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY

* For more information about less, or for information on how to

* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* contact the author, see the README file.

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE

* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT

* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR

* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE

* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN

* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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#include "less.h"

#include "position.h"

#if MSDOS_COMPILER==WIN32C

#include <windows.h>

#endif

public char * every_first_cmd = NULL;

public int new_file;

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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;

extern int quit_at_eof;

extern int cbufs;

extern int errmsgs;

extern int screen_trashed;

extern int force_open;

#if LOGFILE

public int logfile = -1;

public int force_logfile = FALSE;

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#endif

#if TAGS

extern char * tagfile;

extern char * tags;

extern char * tagoption;

extern int jump_sline;

#endif

#ifdef WIN32

static char consoleTitle[256];

#endif

extern int missing_cap;

extern int know_dumb;

* Entry point.

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char *argv[];

{

IFILE ifile;

char *s;

#ifdef __EMX__

_response(&argc, &argv);

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#endif

progname = *argv++;

argc--;

secure = 0;

s = lgetenv("LESSSECURE");

if (s != NULL && *s != '\0')

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);

get_term();

init_cmds();

init_prompt();

init_charset();

init_line();

init_option();

scan_option(getenv("LESS"));

s = lgetenv("LESS");

if (s != NULL)

scan_option(save(s));

#if GNU_OPTIONS

#define isoptstring(s) (((s)[0] == '-' || (s)[0] == '+') && (s)[1] != '\0')

while (argc > 0 && (isoptstring(*argv) || isoptpending()))

* Special case for "less --help" and "less --version".

if (argc == 2)

{

if (strcmp(argv[0], "--help") == 0)

s = *argv++;

scan_option("-?");

argc--;

if (strcmp(argv[0], "--version") == 0)

if (strcmp(s, "--") == 0)

scan_option("-V");

break;

scan_option(s);

}

#endif

#define isoptstring(s) (((s)[0] == '-' || (s)[0] == '+') && (s)[1] != '\0')

while (--argc > 0 && (isoptstring(argv[0]) || isoptpending()))

scan_option(*argv++);

#undef isoptstring

if (isoptpending())

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}

#if EDITOR

editor = getenv("VISUAL");

editor = lgetenv("VISUAL");

if (editor == NULL || *editor == '\0')

{

editor = getenv("EDITOR");

editor = lgetenv("EDITOR");

if (editor == NULL || *editor == '\0')

editor = EDIT_PGM;

}

editproto = getenv("LESSEDIT");

editproto = lgetenv("LESSEDIT");

if (editproto == NULL || *editproto == '\0')

editproto = "%E ?lm+%lm. %f";

#endif

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* to "register" them with the ifile system.

ifile = NULL_IFILE;

while (--argc >= 0)

if (dohelp)

ifile = get_ifile(FAKE_HELPFILE, ifile);

while (argc-- > 0)

{

#if MSOFTC || OS2

char *filename;

#if (MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC)

* Because the "shell" doesn't expand filename patterns,

* treat each argument as a filename pattern rather than

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struct textlist tlist;

char *gfilename;

char *filename;

gfilename = glob(*argv++);

gfilename = lglob(*argv++);

init_textlist(&tlist, gfilename);

filename = NULL;

while ((filename = forw_textlist(&tlist, filename)) != NULL)

ifile = get_ifile(filename, ifile);

{

(void) get_ifile(filename, ifile);

ifile = prev_ifile(NULL_IFILE);

}

free(gfilename);

#else

ifile = get_ifile(*argv++, ifile);

filename = shell_quote(*argv);

if (filename == NULL)

filename = *argv;

argv++;

(void) get_ifile(filename, ifile);

ifile = prev_ifile(NULL_IFILE);

#endif

}

* Set up terminal, etc.

is_tty = isatty(1);

if (!is_tty)

{

* Output is not a tty.

* Just copy the input file(s) to output.

SET_BINARY(1);

if (nifile() == 0)

{

if (edit_stdin() == 0)

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quit(QUIT_OK);

}

if (missing_cap && !know_dumb)

error("WARNING: terminal is not fully functional", NULL_PARG);

init_mark();

raw_mode(1);

open_getchr();

raw_mode(1);

init_signals(1);

* Select the first file to examine.

#if TAGS

if (tagoption != NULL)

if (tagoption != NULL || strcmp(tags, "-") == 0)

{

* A -t option was given.

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quit(QUIT_ERROR);

}

findtag(tagoption);

if (tagfile == NULL)

if (edit_tagfile()) /* Edit file which contains the tag */

quit(QUIT_ERROR);

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.

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commands();

quit(QUIT_OK);

/*NOTREACHED*/

return (0);

}

* Copy a string, truncating to the specified length if necessary.

* Unlike strncpy(), the resulting string is guaranteed to be null-terminated.

public void

strtcpy(to, from, len)

char *to;

char *from;

unsigned int len;

{

strncpy(to, from, len);

to[len-1] = '\0';

}

* Copy a string to a "safe" place

* (that is, to a buffer allocated by calloc).

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error("Cannot allocate memory", NULL_PARG);

quit(QUIT_ERROR);

/*NOTREACHED*/

return (NULL);

}

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}

* 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;

{

for ( ; *s != '\0'; s++, ps++)

{

c = *ps;

if (uppercase)

{

if (len == 0 && SIMPLE_IS_LOWER(c))

return (-1);

if (SIMPLE_IS_UPPER(c))

c = SIMPLE_TO_LOWER(c);

}

sc = *s;

if (len > 0 && SIMPLE_IS_UPPER(sc))

sc = SIMPLE_TO_LOWER(sc);

if (c != sc)

break;

len++;

}

return (len);

}

* Exit the program.

public void

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save_status = status;

quitting = 1;

edit((char*)NULL);

if (any_display)

if (any_display && is_tty)

clear_bot();

deinit();

flush();

raw_mode(0);

#if MSOFTC

#if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC

* If we don't close 2, we get some garbage from

* 2's buffer when it flushes automatically.

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close(2);

#endif

#if WIN32

SetConsoleTitle(consoleTitle);

#endif

close_getchr();

exit(status);

}