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127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
/* Java CLASSPATH handling.
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Copyright (C) 2001 Free Software Foundation, Inc.
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Written by Bruno Haible <haible@clisp.cons.org>, 2001.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation,
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Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* Separator in PATH like lists of pathnames. */
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#if defined _WIN32 || defined __WIN32__ || defined __EMX__ || defined __DJGPP__
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/* Win32, OS/2, DOS */
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# define PATH_SEPARATOR ';'
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#else
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/* Unix */
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# define PATH_SEPARATOR ':'
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#endif
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/* Prototypes for local functions. Needed to ensure compiler checking of
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function argument counts despite of K&R C function definition syntax. */
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static char * new_classpath PARAMS ((const char * const *classpaths,
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unsigned int classpaths_count,
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bool use_minimal_classpath));
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static char * set_classpath PARAMS ((const char * const *classpaths,
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unsigned int classpaths_count,
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bool use_minimal_classpath,
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bool verbose));
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static void reset_classpath PARAMS ((char *old_classpath));
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/* Return the new CLASSPATH value. The given classpaths are prepended to
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the current CLASSPATH value. If use_minimal_classpath, the current
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CLASSPATH is ignored. */
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static char *
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new_classpath (classpaths, classpaths_count, use_minimal_classpath)
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const char * const *classpaths;
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unsigned int classpaths_count;
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bool use_minimal_classpath;
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{
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const char *old_classpath;
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unsigned int length;
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unsigned int i;
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char *result;
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char *p;
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old_classpath = (use_minimal_classpath ? NULL : getenv ("CLASSPATH"));
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if (old_classpath == NULL)
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old_classpath = "";
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length = 0;
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for (i = 0; i < classpaths_count; i++)
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length += strlen (classpaths[i]) + 1;
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length += strlen (old_classpath);
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if (classpaths_count > 0 && old_classpath[0] == '\0')
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length--;
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result = (char *) xmalloc (length + 1);
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p = result;
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for (i = 0; i < classpaths_count; i++)
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{
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memcpy (p, classpaths[i], strlen (classpaths[i]));
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p += strlen (classpaths[i]);
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*p++ = PATH_SEPARATOR;
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}
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if (old_classpath[0] != '\0')
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{
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memcpy (p, old_classpath, strlen (old_classpath));
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p += strlen (old_classpath);
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}
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else
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{
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if (classpaths_count > 0)
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p--;
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}
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*p = '\0';
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return result;
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}
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/* Set CLASSPATH and returns a safe copy of its old value. */
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static char *
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set_classpath (classpaths, classpaths_count, use_minimal_classpath, verbose)
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const char * const *classpaths;
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unsigned int classpaths_count;
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bool use_minimal_classpath;
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bool verbose;
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{
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const char *old_CLASSPATH = getenv ("CLASSPATH");
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char *result = (old_CLASSPATH != NULL ? xstrdup (old_CLASSPATH) : NULL);
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char *new_CLASSPATH =
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new_classpath (classpaths, classpaths_count, use_minimal_classpath);
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if (verbose)
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printf ("CLASSPATH=%s ", new_CLASSPATH);
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xsetenv ("CLASSPATH", new_CLASSPATH, 1);
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free (new_CLASSPATH);
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return result;
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}
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/* Restore CLASSPATH to its previous value. */
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static void
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reset_classpath (old_classpath)
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char *old_classpath;
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{
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if (old_classpath != NULL)
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{
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xsetenv ("CLASSPATH", old_classpath, 1);
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free (old_classpath);
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}
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else
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unsetenv ("CLASSPATH");
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}
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