| Current Path : /usr/src/contrib/less/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/contrib/less/main.c |
/* $FreeBSD: release/9.1.0/contrib/less/main.c 221715 2011-05-09 21:51:59Z delphij $ */
/*
* Copyright (C) 1984-2011 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 about less, or for information on how to
* contact the author, see the README file.
*/
/*
* Entry point, initialization, miscellaneous routines.
*/
#include "less.h"
#if MSDOS_COMPILER==WIN32C
#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
extern int less_is_more;
extern int missing_cap;
extern int know_dumb;
extern int quit_if_one_screen;
extern int no_init;
extern int pr_type;
/*
* Entry point.
*/
int
main(argc, argv)
int argc;
char *argv[];
{
IFILE ifile;
char *s;
extern char *__progname;
#ifdef __EMX__
_response(&argc, &argv);
_wildcard(&argc, &argv);
#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_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.
*/
for (s = progname + strlen(progname); s > progname; s--)
{
if (s[-1] == PATHNAME_SEP[0])
break;
}
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;
if (less_is_more && get_quit_at_eof())
quit_if_one_screen = TRUE;
#if EDITOR
editor = lgetenv("VISUAL");
if (editor == NULL || *editor == '\0')
{
editor = lgetenv("EDITOR");
if (editor == NULL || *editor == '\0')
editor = EDIT_PGM;
}
editproto = lgetenv("LESSEDIT");
if (editproto == NULL || *editproto == '\0')
editproto = "%E ?lm+%lm. %f";
#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)
{
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
* a single filename.
* Expand the pattern and iterate over the expanded list.
*/
struct textlist tlist;
char *gfilename;
gfilename = lglob(*argv++);
init_textlist(&tlist, gfilename);
filename = NULL;
while ((filename = forw_textlist(&tlist, filename)) != NULL)
{
(void) get_ifile(filename, ifile);
ifile = prev_ifile(NULL_IFILE);
}
free(gfilename);
#else
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.
*/
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)
cat_file();
} else 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);
init_mark();
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 (nifile() == 0)
{
if (edit_stdin()) /* Edit standard input */
quit(QUIT_ERROR);
} else
{
if (edit_first()) /* Edit first valid file in cmd line */
quit(QUIT_ERROR);
}
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)
char *s;
{
register 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;
{
register 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)
register 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;
{
register int c;
register int sc;
register 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);
}