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/* Java CLASSPATH handling.
Copyright (C) 2001-2003, 2006, 2009-2010 Free Software Foundation, Inc.
Written by Bruno Haible <haible@clisp.cons.org>, 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "classpath.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#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);
}
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