2 * Copyright (C) 1984-2011 Mark Nudelman
4 * You may distribute under the terms of either the GNU General Public
5 * License or the Less License, as specified in the README file.
7 * For more information about less, or for information on how to
8 * contact the author, see the README file.
13 * Entry point, initialization, miscellaneous routines.
17 #if MSDOS_COMPILER==WIN32C
21 public char * every_first_cmd = NULL;
24 public IFILE curr_ifile = NULL_IFILE;
25 public IFILE old_ifile = NULL_IFILE;
26 public struct scrpos initial_scrpos;
27 public int any_display = FALSE;
28 public POSITION start_attnpos = NULL_POSITION;
29 public POSITION end_attnpos = NULL_POSITION;
31 public char * progname;
37 public int logfile = -1;
38 public int force_logfile = FALSE;
39 public char * namelogfile = NULL;
44 public char * editproto;
49 extern char * tagoption;
50 extern int jump_sline;
54 static char consoleTitle[256];
57 extern int less_is_more;
58 extern int missing_cap;
60 extern int quit_if_one_screen;
76 _response(&argc, &argv);
77 _wildcard(&argc, &argv);
84 s = lgetenv("LESSSECURE");
85 if (s != NULL && *s != '\0')
89 if (getenv("HOME") == NULL)
92 * If there is no HOME environment variable,
93 * try the concatenation of HOMEDRIVE + HOMEPATH.
95 char *drive = getenv("HOMEDRIVE");
96 char *path = getenv("HOMEPATH");
97 if (drive != NULL && path != NULL)
99 char *env = (char *) ecalloc(strlen(drive) +
100 strlen(path) + 6, sizeof(char));
101 strcpy(env, "HOME=");
107 GetConsoleTitle(consoleTitle, sizeof(consoleTitle)/sizeof(char));
111 * Process command line arguments and LESS environment arguments.
112 * Command line arguments override environment arguments.
124 * If the name of the executable program is "more",
125 * act like LESS_IS_MORE is set.
127 for (s = progname + strlen(progname); s > progname; s--)
129 if (s[-1] == PATHNAME_SEP[0])
132 if (strcmp(s, "more") == 0)
137 s = lgetenv(less_is_more ? "MORE" : "LESS");
139 scan_option(save(s));
141 #define isoptstring(s) (((s)[0] == '-' || (s)[0] == '+') && (s)[1] != '\0')
142 while (argc > 0 && (isoptstring(*argv) || isoptpending()))
146 if (strcmp(s, "--") == 0)
155 * Last command line option was a flag requiring a
156 * following string, but there was no following string.
162 if (less_is_more && get_quit_at_eof())
163 quit_if_one_screen = TRUE;
166 editor = lgetenv("VISUAL");
167 if (editor == NULL || *editor == '\0')
169 editor = lgetenv("EDITOR");
170 if (editor == NULL || *editor == '\0')
173 editproto = lgetenv("LESSEDIT");
174 if (editproto == NULL || *editproto == '\0')
175 editproto = "%E ?lm+%lm. %f";
179 * Call get_ifile with all the command line filenames
180 * to "register" them with the ifile system.
184 ifile = get_ifile(FAKE_HELPFILE, ifile);
188 #if (MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC)
190 * Because the "shell" doesn't expand filename patterns,
191 * treat each argument as a filename pattern rather than
193 * Expand the pattern and iterate over the expanded list.
195 struct textlist tlist;
198 gfilename = lglob(*argv++);
199 init_textlist(&tlist, gfilename);
201 while ((filename = forw_textlist(&tlist, filename)) != NULL)
203 (void) get_ifile(filename, ifile);
204 ifile = prev_ifile(NULL_IFILE);
208 filename = shell_quote(*argv);
209 if (filename == NULL)
212 (void) get_ifile(filename, ifile);
213 ifile = prev_ifile(NULL_IFILE);
217 * Set up terminal, etc.
222 * Output is not a tty.
223 * Just copy the input file(s) to output.
228 if (edit_stdin() == 0)
230 } else if (edit_first() == 0)
234 } while (edit_next(1) == 0);
239 if (missing_cap && !know_dumb)
240 error("WARNING: terminal is not fully functional", NULL_PARG);
247 * Select the first file to examine.
250 if (tagoption != NULL || strcmp(tags, "-") == 0)
253 * A -t option was given.
254 * Verify that no filenames were also given.
255 * Edit the file selected by the "tags" search,
256 * and search for the proper line in the file.
260 error("No filenames allowed with -t option", NULL_PARG);
264 if (edit_tagfile()) /* Edit file which contains the tag */
267 * Search for the line which contains the tag.
268 * Set up initial_scrpos so we display that line.
270 initial_scrpos.pos = tagsearch();
271 if (initial_scrpos.pos == NULL_POSITION)
273 initial_scrpos.ln = jump_sline;
278 if (edit_stdin()) /* Edit standard input */
282 if (edit_first()) /* Edit first valid file in cmd line */
294 * Copy a string to a "safe" place
295 * (that is, to a buffer allocated by calloc).
303 p = (char *) ecalloc(strlen(s)+1, sizeof(char));
310 * Like calloc(), but never returns an error (NULL).
317 register VOID_POINTER p;
319 p = (VOID_POINTER) calloc(count, size);
322 error("Cannot allocate memory", NULL_PARG);
329 * Skip leading spaces in a string.
335 while (*s == ' ' || *s == '\t')
341 * See how many characters of two strings are identical.
342 * If uppercase is true, the first string must begin with an uppercase
343 * character; the remainder of the first string may be either case.
346 sprefix(ps, s, uppercase)
353 register int len = 0;
355 for ( ; *s != '\0'; s++, ps++)
360 if (len == 0 && ASCII_IS_LOWER(c))
362 if (ASCII_IS_UPPER(c))
363 c = ASCII_TO_LOWER(c);
366 if (len > 0 && ASCII_IS_UPPER(sc))
367 sc = ASCII_TO_LOWER(sc);
382 static int save_status;
385 * Put cursor at bottom left corner, clear the line,
386 * reset the terminal modes, and exit.
389 status = save_status;
391 save_status = status;
395 if (any_display && is_tty)
400 #if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC
402 * If we don't close 2, we get some garbage from
403 * 2's buffer when it flushes automatically.
404 * I cannot track this one down RB
405 * The same bug shows up if we use ^C^C to abort.
410 SetConsoleTitle(consoleTitle);