1 /* Handle CLASSPATH, -classpath, and path searching.
3 Copyright (C) 1998, 1999 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. */
31 /* Some boilerplate that really belongs in a header. */
33 #ifndef GET_ENV_PATH_LIST
34 #define GET_ENV_PATH_LIST(VAR,NAME) do { (VAR) = getenv (NAME); } while (0)
37 /* By default, colon separates directories in a path. */
38 #ifndef PATH_SEPARATOR
39 #define PATH_SEPARATOR ':'
43 #define DIR_SEPARATOR '/'
52 /* Possible flag values. */
56 /* We keep linked lists of directory names. A ``directory'' can be
57 either an ordinary directory or a .zip file. */
65 static void free_entry
PROTO ((struct entry
**));
66 static void append_entry
PROTO ((struct entry
**, struct entry
*));
67 static void add_entry
PROTO ((struct entry
**, const char *, int));
68 static void add_path
PROTO ((struct entry
**, const char *, int));
70 /* We support several different ways to set the class path.
72 built-in system directory (only libgcj.zip)
73 CLASSPATH environment variable
74 -CLASSPATH overrides CLASSPATH
75 -classpath option - overrides CLASSPATH, -CLASSPATH, and built-in
76 -I prepends path to list
78 We implement this by keeping several path lists, and then simply
79 ignoring the ones which are not relevant. */
81 /* This holds all the -I directories. */
82 static struct entry
*include_dirs
;
84 /* This holds the CLASSPATH environment variable. */
85 static struct entry
*classpath_env
;
87 /* This holds the -CLASSPATH command-line option. */
88 static struct entry
*classpath_u
;
90 /* This holds the -classpath command-line option. */
91 static struct entry
*classpath_l
;
93 /* This holds the default directories. Some of these will have the
95 static struct entry
*sys_dirs
;
97 /* This is the sealed list. It is just a combination of other lists. */
98 static struct entry
*sealed
;
100 /* We keep track of the longest path we've seen. */
101 static int longest_path
= 0;
111 for (e
= *entp
; e
; e
= n
)
121 append_entry (entp
, ent
)
125 /* It doesn't matter if this is slow, since it is run only at
126 startup, and then infrequently. */
129 /* Find end of list. */
130 for (e
= *entp
; e
&& e
->next
; e
= e
->next
)
140 add_entry (entp
, filename
, is_system
)
142 const char *filename
;
148 n
= (struct entry
*) ALLOC (sizeof (struct entry
));
149 n
->flags
= is_system
? FLAG_SYSTEM
: 0;
152 len
= strlen (filename
);
153 if (len
> 4 && (strcmp (filename
+ len
- 4, ".zip") == 0
154 || strcmp (filename
+ len
- 4, ".jar") == 0))
156 n
->flags
|= FLAG_ZIP
;
157 /* If the user uses -classpath then he'll have to include
158 libgcj.zip in the value. We check for this in a simplistic
159 way. Symlinks will fool this test. This is only used for
160 -MM and -MMD, so it probably isn't terribly important. */
161 if (! strcmp (filename
, LIBGCJ_ZIP_FILE
))
162 n
->flags
|= FLAG_SYSTEM
;
165 /* Note that we add a trailing separator to `.zip' names as well.
166 This is a little hack that lets the searching code in jcf-io.c
167 work more easily. Eww. */
168 if (filename
[len
- 1] != '/' && filename
[len
- 1] != DIR_SEPARATOR
)
170 char *f2
= (char *) alloca (len
+ 2);
171 strcpy (f2
, filename
);
172 f2
[len
] = DIR_SEPARATOR
;
174 n
->name
= xstrdup (f2
);
178 n
->name
= xstrdup (filename
);
180 if (len
> longest_path
)
183 append_entry (entp
, n
);
187 add_path (entp
, cp
, is_system
)
192 const char *startp
, *endp
;
196 char *buf
= (char *) alloca (strlen (cp
) + 3);
200 if (! *endp
|| *endp
== PATH_SEPARATOR
)
205 buf
[1] = DIR_SEPARATOR
;
210 strncpy (buf
, startp
, endp
- startp
);
211 buf
[endp
- startp
] = '\0';
213 add_entry (entp
, buf
, is_system
);
225 /* Initialize the path module. */
234 add_entry (&sys_dirs
, ".", 0);
236 sep
[0] = DIR_SEPARATOR
;
239 GET_ENV_PATH_LIST (cp
, "GCC_EXEC_PREFIX");
242 try = alloca (strlen (cp
) + 50);
243 /* The exec prefix can be something like
244 /usr/local/bin/../lib/gcc-lib/. We want to change this
245 into a pointer to the share directory. We support two
246 configurations: one where prefix and exec-prefix are the
247 same, and one where exec-prefix is `prefix/SOMETHING'. */
249 strcat (try, DIR_UP
);
251 strcat (try, DIR_UP
);
255 strcpy (try + len
, "share");
257 strcat (try, "libgcj.zip");
258 if (! stat (try, &stat_b
))
260 add_entry (&sys_dirs
, try, 1);
265 strcpy (try + len
, DIR_UP
);
267 strcat (try, "share");
269 strcat (try, "libgcj.zip");
270 if (! stat (try, &stat_b
))
272 add_entry (&sys_dirs
, try, 1);
279 /* Desperation: use the installed one. */
280 add_entry (&sys_dirs
, LIBGCJ_ZIP_FILE
, 1);
283 GET_ENV_PATH_LIST (cp
, "CLASSPATH");
284 add_path (&classpath_env
, cp
, 0);
287 /* Call this when -classpath is seen on the command line. */
289 jcf_path_classpath_arg (path
)
292 free_entry (&classpath_l
);
293 add_path (&classpath_l
, path
, 0);
296 /* Call this when -CLASSPATH is seen on the command line. */
298 jcf_path_CLASSPATH_arg (path
)
301 free_entry (&classpath_u
);
302 add_path (&classpath_u
, path
, 0);
305 /* Call this when -I is seen on the command line. */
307 jcf_path_include_arg (path
)
310 add_entry (&include_dirs
, path
, 0);
313 /* We `seal' the path by linking everything into one big list. Then
314 we provide a way to iterate through the sealed list. */
319 struct entry
*secondary
;
321 sealed
= include_dirs
;
326 secondary
= classpath_l
;
330 else if (classpath_u
)
332 secondary
= classpath_u
;
337 secondary
= classpath_env
;
338 classpath_env
= NULL
;
341 free_entry (&classpath_l
);
342 free_entry (&classpath_u
);
343 free_entry (&classpath_env
);
345 append_entry (&sealed
, secondary
);
349 append_entry (&sealed
, sys_dirs
);
353 free_entry (&sys_dirs
);
359 return (void *) sealed
;
366 struct entry
*ent
= (struct entry
*) x
;
367 return (void *) ent
->next
;
370 /* We guarantee that the return path will either be a zip file, or it
371 will end with a directory separator. */
376 struct entry
*ent
= (struct entry
*) x
;
381 jcf_path_is_zipfile (x
)
384 struct entry
*ent
= (struct entry
*) x
;
385 return (ent
->flags
& FLAG_ZIP
);
389 jcf_path_is_system (x
)
392 struct entry
*ent
= (struct entry
*) x
;
393 return (ent
->flags
& FLAG_SYSTEM
);