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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
#include "apr_private.h"
#include "apr_file_io.h"
#include "apr_strings.h"
#include "apr_env.h"
/*
* FIXME
* Currently, this variable is a bit of misnomer.
* The intention is to have this in APR's global pool so that we don't have
* to go through this every time.
*/
static char global_temp_dir[APR_PATH_MAX+1] = { 0 };
/* Try to open a temporary file in the temporary dir, write to it,
and then close it. */
static int test_tempdir(const char *temp_dir, apr_pool_t *p)
{
apr_file_t *dummy_file;
const char *path = apr_pstrcat(p, temp_dir, "/apr-tmp.XXXXXX", NULL);
if (apr_file_mktemp(&dummy_file, (char *)path, 0, p) == APR_SUCCESS) {
if (apr_file_putc('!', dummy_file) == APR_SUCCESS) {
if (apr_file_close(dummy_file) == APR_SUCCESS) {
return 1;
}
}
}
return 0;
}
APR_DECLARE(apr_status_t) apr_temp_dir_get(const char **temp_dir,
apr_pool_t *p)
{
apr_status_t apr_err;
const char *try_dirs[] = { "/tmp", "/usr/tmp", "/var/tmp" };
const char *try_envs[] = { "TMP", "TEMP", "TMPDIR" };
char *cwd;
int i;
/* Our goal is to find a temporary directory suitable for writing
into. We'll only pay the price once if we're successful -- we
cache our successful find. Here's the order in which we'll try
various paths:
$TMP
$TEMP
$TMPDIR
"C:\TEMP" (windows only)
"SYS:\TMP" (netware only)
"/tmp"
"/var/tmp"
"/usr/tmp"
P_tmpdir (POSIX define)
`pwd`
NOTE: This algorithm is basically the same one used by Python
2.2's tempfile.py module. */
/* Try the environment first. */
for (i = 0; i < (sizeof(try_envs) / sizeof(const char *)); i++) {
char *value;
apr_err = apr_env_get(&value, try_envs[i], p);
if ((apr_err == APR_SUCCESS) && value) {
apr_size_t len = strlen(value);
if (len && (len < APR_PATH_MAX) && test_tempdir(value, p)) {
memcpy(global_temp_dir, value, len + 1);
goto end;
}
}
}
#ifdef WIN32
/* Next, on Win32, try the C:\TEMP directory. */
if (test_tempdir("C:\\TEMP", p)) {
memcpy(global_temp_dir, "C:\\TEMP", 7 + 1);
goto end;
}
#endif
#ifdef NETWARE
/* Next, on NetWare, try the SYS:/TMP directory. */
if (test_tempdir("SYS:/TMP", p)) {
memcpy(global_temp_dir, "SYS:/TMP", 8 + 1);
goto end;
}
#endif
/* Next, try a set of hard-coded paths. */
for (i = 0; i < (sizeof(try_dirs) / sizeof(const char *)); i++) {
if (test_tempdir(try_dirs[i], p)) {
memcpy(global_temp_dir, try_dirs[i], strlen(try_dirs[i]) + 1);
goto end;
}
}
#ifdef P_tmpdir
/*
* If we have it, use the POSIX definition of where
* the tmpdir should be
*/
if (test_tempdir(P_tmpdir, p)) {
memcpy(global_temp_dir, P_tmpdir, strlen(P_tmpdir) +1);
goto end;
}
#endif
/* Finally, try the current working directory. */
if (APR_SUCCESS == apr_filepath_get(&cwd, APR_FILEPATH_NATIVE, p)) {
if (test_tempdir(cwd, p)) {
memcpy(global_temp_dir, cwd, strlen(cwd) + 1);
goto end;
}
}
end:
if (global_temp_dir[0]) {
*temp_dir = apr_pstrdup(p, global_temp_dir);
return APR_SUCCESS;
}
return APR_EGENERAL;
}
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