1 /* Handle CLASSPATH, -classpath, and path searching.
3 Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNU CC; see the file COPYING. If not, write to
17 the Free Software Foundation, 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
20 Java and all Java-based marks are trademarks or registered trademarks
21 of Sun Microsystems, Inc. in the United States and other countries.
22 The Free Software Foundation is independent of Sun Microsystems, Inc. */
24 /* Written by Tom Tromey <tromey@cygnus.com>, October 1998. */
33 /* By default, colon separates directories in a path. */
34 #ifndef PATH_SEPARATOR
35 #define PATH_SEPARATOR ':'
39 #define DIR_SEPARATOR '/'
48 /* Possible flag values. */
52 /* We keep linked lists of directory names. A ``directory'' can be
53 either an ordinary directory or a .zip file. */
61 static void free_entry PARAMS ((struct entry **));
62 static void append_entry PARAMS ((struct entry **, struct entry *));
63 static void add_entry PARAMS ((struct entry **, const char *, int));
64 static void add_path PARAMS ((struct entry **, const char *, int));
66 /* We support several different ways to set the class path.
68 built-in system directory (only libgcj.jar)
69 CLASSPATH environment variable
70 -classpath option overrides $CLASSPATH
71 -CLASSPATH option is a synonym for -classpath (for compatibility)
72 -bootclasspath overrides built-in
73 -extdirs sets the extensions directory path (overrides built-in)
74 -I prepends path to list
76 We implement this by keeping several path lists, and then simply
77 ignoring the ones which are not relevant. */
79 /* This holds all the -I directories. */
80 static struct entry *include_dirs;
82 /* This holds the CLASSPATH environment variable. */
83 static struct entry *classpath_env;
85 /* This holds the -classpath command-line option. */
86 static struct entry *classpath_user;
88 /* This holds the default directories. Some of these will have the
90 static struct entry *sys_dirs;
92 /* This holds the extensions path entries. */
93 static struct entry *extensions;
95 /* This is the sealed list. It is just a combination of other lists. */
96 static struct entry *sealed;
98 /* We keep track of the longest path we've seen. */
99 static int longest_path = 0;
109 for (e = *entp; e; e = n)
119 append_entry (entp, ent)
123 /* It doesn't matter if this is slow, since it is run only at
124 startup, and then infrequently. */
127 /* Find end of list. */
128 for (e = *entp; e && e->next; e = e->next)
138 add_entry (entp, filename, is_system)
140 const char *filename;
146 n = (struct entry *) ALLOC (sizeof (struct entry));
147 n->flags = is_system ? FLAG_SYSTEM : 0;
150 len = strlen (filename);
151 if (len > 4 && (strcmp (filename + len - 4, ".zip") == 0
152 || strcmp (filename + len - 4, ".jar") == 0))
154 n->flags |= FLAG_ZIP;
155 /* If the user uses -classpath then he'll have to include
156 libgcj.jar in the value. We check for this in a simplistic
157 way. Symlinks will fool this test. This is only used for
158 -MM and -MMD, so it probably isn't terribly important. */
159 if (! strcmp (filename, LIBGCJ_ZIP_FILE))
160 n->flags |= FLAG_SYSTEM;
163 /* Note that we add a trailing separator to `.zip' names as well.
164 This is a little hack that lets the searching code in jcf-io.c
165 work more easily. Eww. */
166 if (filename[len - 1] != '/' && filename[len - 1] != DIR_SEPARATOR)
168 char *f2 = (char *) alloca (len + 2);
169 strcpy (f2, filename);
170 f2[len] = DIR_SEPARATOR;
172 n->name = xstrdup (f2);
176 n->name = xstrdup (filename);
178 if (len > longest_path)
181 append_entry (entp, n);
185 add_path (entp, cp, is_system)
190 const char *startp, *endp;
194 char *buf = (char *) alloca (strlen (cp) + 3);
198 if (! *endp || *endp == PATH_SEPARATOR)
203 buf[1] = DIR_SEPARATOR;
208 strncpy (buf, startp, endp - startp);
209 buf[endp - startp] = '\0';
211 add_entry (entp, buf, is_system);
223 static int init_done = 0;
225 /* Initialize the path module. */
238 sep[0] = DIR_SEPARATOR;
241 GET_ENVIRONMENT (cp, "GCC_EXEC_PREFIX");
244 try = alloca (strlen (cp) + 50);
245 /* The exec prefix can be something like
246 /usr/local/bin/../lib/gcc-lib/. We want to change this
247 into a pointer to the share/java directory. We support two
248 configurations: one where prefix and exec-prefix are the
249 same, and one where exec-prefix is `prefix/SOMETHING'. */
251 strcat (try, DIR_UP);
253 strcat (try, DIR_UP);
257 strcpy (try + len, "share");
259 strcat (try, "java");
261 strcat (try, "libgcj-" DEFAULT_TARGET_VERSION ".jar");
262 if (! stat (try, &stat_b))
264 add_entry (&sys_dirs, try, 1);
266 strcpy (&try[strlen (try)
267 - strlen ("libgcj-" DEFAULT_TARGET_VERSION ".jar")],
271 if (! stat (try, &stat_b))
272 jcf_path_extdirs_arg (try);
276 strcpy (try + len, DIR_UP);
278 strcat (try, "share");
280 strcat (try, "java");
282 strcat (try, "libgcj-" DEFAULT_TARGET_VERSION ".jar");
283 if (! stat (try, &stat_b))
285 add_entry (&sys_dirs, try, 1);
287 strcpy (&try[strlen (try)
288 - strlen ("libgcj-" DEFAULT_TARGET_VERSION ".jar")],
292 if (! stat (try, &stat_b))
293 jcf_path_extdirs_arg (try);
299 /* Desperation: use the installed one. */
301 add_entry (&sys_dirs, LIBGCJ_ZIP_FILE, 1);
302 extdirs = (char *) alloca (strlen (LIBGCJ_ZIP_FILE) + 1);
303 strcpy (extdirs, LIBGCJ_ZIP_FILE);
304 strcpy (&extdirs[strlen (LIBGCJ_ZIP_FILE)
305 - strlen ("libgcj-" DEFAULT_TARGET_VERSION ".jar")],
307 strcat (extdirs, sep);
308 if (! stat (extdirs, &stat_b))
309 jcf_path_extdirs_arg (extdirs);
312 GET_ENVIRONMENT (cp, "CLASSPATH");
313 add_path (&classpath_env, cp, 0);
316 /* Call this when -classpath is seen on the command line.
317 This overrides only the $CLASSPATH environment variable.
320 jcf_path_classpath_arg (path)
323 free_entry (&classpath_user);
324 add_path (&classpath_user, path, 0);
327 /* Call this when -bootclasspath is seen on the command line.
330 jcf_path_bootclasspath_arg (path)
333 free_entry (&sys_dirs);
334 add_path (&sys_dirs, path, 1);
337 /* Call this when -extdirs is seen on the command line.
340 jcf_path_extdirs_arg (cp)
343 const char *startp, *endp;
345 free_entry (&extensions);
349 char *buf = (char *) alloca (strlen (cp) + 3);
353 if (! *endp || *endp == PATH_SEPARATOR)
358 strncpy (buf, startp, endp - startp);
359 buf[endp - startp] = '\0';
363 int dirname_length = strlen (buf);
365 dirp = opendir (buf);
371 struct dirent *direntp = readdir (dirp);
376 if (direntp->d_name[0] != '.')
379 (char *) alloca (dirname_length
380 + strlen (direntp->d_name) + 2);
382 if (name[dirname_length-1] != DIR_SEPARATOR)
384 name[dirname_length] = DIR_SEPARATOR;
385 name[dirname_length+1] = 0;
387 strcat (name, direntp->d_name);
388 add_entry (&extensions, name, 0);
404 /* Call this when -I is seen on the command line. */
406 jcf_path_include_arg (path)
409 add_entry (&include_dirs, path, 0);
412 /* We `seal' the path by linking everything into one big list. Then
413 we provide a way to iterate through the sealed list. If PRINT is
414 true then we print the final class path to stderr. */
416 jcf_path_seal (print)
419 struct entry *secondary;
421 sealed = include_dirs;
426 secondary = classpath_user;
427 classpath_user = NULL;
432 add_entry (&classpath_env, ".", 0);
434 secondary = classpath_env;
435 classpath_env = NULL;
439 free_entry (&classpath_user);
440 free_entry (&classpath_env);
442 append_entry (&sealed, secondary);
443 append_entry (&sealed, sys_dirs);
444 append_entry (&sealed, extensions);
451 fprintf (stderr, "Class path starts here:\n");
452 for (ent = sealed; ent; ent = ent->next)
454 fprintf (stderr, " %s", ent->name);
455 if ((ent->flags & FLAG_SYSTEM))
456 fprintf (stderr, " (system)");
457 if ((ent->flags & FLAG_ZIP))
458 fprintf (stderr, " (zip)");
459 fprintf (stderr, "\n");
467 return (void *) sealed;
474 struct entry *ent = (struct entry *) x;
475 return (void *) ent->next;
478 /* We guarantee that the return path will either be a zip file, or it
479 will end with a directory separator. */
484 struct entry *ent = (struct entry *) x;
489 jcf_path_is_zipfile (x)
492 struct entry *ent = (struct entry *) x;
493 return (ent->flags & FLAG_ZIP);
497 jcf_path_is_system (x)
500 struct entry *ent = (struct entry *) x;
501 return (ent->flags & FLAG_SYSTEM);