/* Java CLASSPATH handling. Copyright (C) 2001-2003, 2006 Free Software Foundation, Inc. Written by Bruno Haible , 2001. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include /* Specification. */ #include "classpath.h" #include #include #include #include "xsetenv.h" #include "xalloc.h" /* Name of environment variable. */ #ifndef CLASSPATHVAR # define CLASSPATHVAR "CLASSPATH" #endif /* Separator in PATH like lists of pathnames. */ #if ((defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__) || defined __EMX__ || defined __DJGPP__ /* Win32, OS/2, DOS */ # define PATH_SEPARATOR ';' #else /* Unix */ # define PATH_SEPARATOR ':' #endif /* Return the new CLASSPATH value. The given classpaths are prepended to the current CLASSPATH value. If use_minimal_classpath, the current CLASSPATH is ignored. */ char * new_classpath (const char * const *classpaths, unsigned int classpaths_count, bool use_minimal_classpath) { const char *old_classpath; unsigned int length; unsigned int i; char *result; char *p; old_classpath = (use_minimal_classpath ? NULL : getenv (CLASSPATHVAR)); if (old_classpath == NULL) old_classpath = ""; length = 0; for (i = 0; i < classpaths_count; i++) length += strlen (classpaths[i]) + 1; length += strlen (old_classpath); if (classpaths_count > 0 && old_classpath[0] == '\0') length--; result = XNMALLOC (length + 1, char); p = result; for (i = 0; i < classpaths_count; i++) { memcpy (p, classpaths[i], strlen (classpaths[i])); p += strlen (classpaths[i]); *p++ = PATH_SEPARATOR; } if (old_classpath[0] != '\0') { memcpy (p, old_classpath, strlen (old_classpath)); p += strlen (old_classpath); } else { if (classpaths_count > 0) p--; } *p = '\0'; return result; } /* Set CLASSPATH and returns a safe copy of its old value. */ char * set_classpath (const char * const *classpaths, unsigned int classpaths_count, bool use_minimal_classpath, bool verbose) { const char *old_CLASSPATH = getenv (CLASSPATHVAR); char *result = (old_CLASSPATH != NULL ? xstrdup (old_CLASSPATH) : NULL); char *new_CLASSPATH = new_classpath (classpaths, classpaths_count, use_minimal_classpath); if (verbose) printf (CLASSPATHVAR "=%s ", new_CLASSPATH); xsetenv (CLASSPATHVAR, new_CLASSPATH, 1); free (new_CLASSPATH); return result; } /* Restore CLASSPATH to its previous value. */ void reset_classpath (char *old_classpath) { if (old_classpath != NULL) { xsetenv (CLASSPATHVAR, old_classpath, 1); free (old_classpath); } else unsetenv (CLASSPATHVAR); }