3 * Copyright (C) 1984-2007 Mark Nudelman
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Less License, as specified in the README file.
8 * For more information about less, or for information on how to
9 * contact the author, see the README file.
14 * Entry point, initialization, miscellaneous routines.
18 #if MSDOS_COMPILER==WIN32C
22 public char * every_first_cmd = NULL;
25 public IFILE curr_ifile = NULL_IFILE;
26 public IFILE old_ifile = NULL_IFILE;
27 public struct scrpos initial_scrpos;
28 public int any_display = FALSE;
29 public POSITION start_attnpos = NULL_POSITION;
30 public POSITION end_attnpos = NULL_POSITION;
32 public char * progname;
36 public int less_is_more;
39 public int logfile = -1;
40 public int force_logfile = FALSE;
41 public char * namelogfile = NULL;
46 public char * editproto;
51 extern char * tagoption;
52 extern int jump_sline;
56 static char consoleTitle[256];
59 extern int missing_cap;
61 extern int quit_if_one_screen;
76 extern char *__progname;
79 _response(&argc, &argv);
80 _wildcard(&argc, &argv);
87 s = lgetenv("LESSSECURE");
88 if (s != NULL && *s != '\0')
92 if (getenv("HOME") == NULL)
95 * If there is no HOME environment variable,
96 * try the concatenation of HOMEDRIVE + HOMEPATH.
98 char *drive = getenv("HOMEDRIVE");
99 char *path = getenv("HOMEPATH");
100 if (drive != NULL && path != NULL)
102 char *env = (char *) ecalloc(strlen(drive) +
103 strlen(path) + 6, sizeof(char));
104 strcpy(env, "HOME=");
110 GetConsoleTitle(consoleTitle, sizeof(consoleTitle)/sizeof(char));
114 * Process command line arguments and LESS environment arguments.
115 * Command line arguments override environment arguments.
126 * If the name of the executable program is "more",
127 * act like LESS_IS_MORE is set.
129 for (s = progname + strlen(progname); s > progname; s--)
131 if (s[-1] == PATHNAME_SEP[0])
134 if (strcmp(s, "more") == 0)
142 s = lgetenv(less_is_more ? "MORE" : "LESS");
144 scan_option(save(s));
146 #define isoptstring(s) less_is_more ? (((s)[0] == '-') && (s)[1] != '\0') : \
147 (((s)[0] == '-' || (s)[0] == '+') && (s)[1] != '\0')
148 while (argc > 0 && (isoptstring(*argv) || isoptpending()))
152 if (strcmp(s, "--") == 0)
161 * Last command line option was a flag requiring a
162 * following string, but there was no following string.
168 if (less_is_more || get_quit_at_eof())
169 no_init = quit_if_one_screen = TRUE;
172 editor = lgetenv("VISUAL");
173 if (editor == NULL || *editor == '\0')
175 editor = lgetenv("EDITOR");
176 if (editor == NULL || *editor == '\0')
179 editproto = lgetenv("LESSEDIT");
180 if (editproto == NULL || *editproto == '\0')
181 editproto = "%E ?lm+%lm. %f";
185 * Call get_ifile with all the command line filenames
186 * to "register" them with the ifile system.
190 ifile = get_ifile(FAKE_HELPFILE, ifile);
194 #if (MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC)
196 * Because the "shell" doesn't expand filename patterns,
197 * treat each argument as a filename pattern rather than
199 * Expand the pattern and iterate over the expanded list.
201 struct textlist tlist;
204 gfilename = lglob(*argv++);
205 init_textlist(&tlist, gfilename);
207 while ((filename = forw_textlist(&tlist, filename)) != NULL)
209 (void) get_ifile(filename, ifile);
210 ifile = prev_ifile(NULL_IFILE);
214 filename = shell_quote(*argv);
215 if (filename == NULL)
218 (void) get_ifile(filename, ifile);
219 ifile = prev_ifile(NULL_IFILE);
223 * Set up terminal, etc.
228 * Output is not a tty.
229 * Just copy the input file(s) to output.
234 if (edit_stdin() == 0)
236 } else if (edit_first() == 0)
240 } while (edit_next(1) == 0);
245 if (missing_cap && !know_dumb)
246 error("WARNING: terminal is not fully functional", NULL_PARG);
253 * Select the first file to examine.
256 if (tagoption != NULL || strcmp(tags, "-") == 0)
259 * A -t option was given.
260 * Verify that no filenames were also given.
261 * Edit the file selected by the "tags" search,
262 * and search for the proper line in the file.
266 error("No filenames allowed with -t option", NULL_PARG);
270 if (edit_tagfile()) /* Edit file which contains the tag */
273 * Search for the line which contains the tag.
274 * Set up initial_scrpos so we display that line.
276 initial_scrpos.pos = tagsearch();
277 if (initial_scrpos.pos == NULL_POSITION)
279 initial_scrpos.ln = jump_sline;
284 if (edit_stdin()) /* Edit standard input */
288 if (edit_first()) /* Edit first valid file in cmd line */
300 * Copy a string to a "safe" place
301 * (that is, to a buffer allocated by calloc).
309 p = (char *) ecalloc(strlen(s)+1, sizeof(char));
316 * Like calloc(), but never returns an error (NULL).
323 register VOID_POINTER p;
325 p = (VOID_POINTER) calloc(count, size);
328 error("Cannot allocate memory", NULL_PARG);
335 * Skip leading spaces in a string.
341 while (*s == ' ' || *s == '\t')
347 * See how many characters of two strings are identical.
348 * If uppercase is true, the first string must begin with an uppercase
349 * character; the remainder of the first string may be either case.
352 sprefix(ps, s, uppercase)
359 register int len = 0;
361 for ( ; *s != '\0'; s++, ps++)
366 if (len == 0 && ASCII_IS_LOWER(c))
368 if (ASCII_IS_UPPER(c))
369 c = ASCII_TO_LOWER(c);
372 if (len > 0 && ASCII_IS_UPPER(sc))
373 sc = ASCII_TO_LOWER(sc);
388 static int save_status;
391 * Put cursor at bottom left corner, clear the line,
392 * reset the terminal modes, and exit.
395 status = save_status;
397 save_status = status;
401 if (any_display && is_tty)
406 #if MSDOS_COMPILER && MSDOS_COMPILER != DJGPPC
408 * If we don't close 2, we get some garbage from
409 * 2's buffer when it flushes automatically.
410 * I cannot track this one down RB
411 * The same bug shows up if we use ^C^C to abort.
416 SetConsoleTitle(consoleTitle);