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/*
* 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 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
// Contains code handling temporary files and dirs
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#ifdef WIN32
# include <io.h>
#endif
#include <string.h>
#include <time.h>
#include "filintrn.h"
#include "libs/timelib.h"
#include "port.h"
#include "libs/compiler.h"
#include "libs/log.h"
#include "libs/memlib.h"
static char *tempDirName;
uio_DirHandle *tempDir;
static void
removeTempDir (void)
{
rmdir (tempDirName);
}
// Try if the null-terminated path 'dir' to a directory is valid
// as temp path.
// On success, 'buf' will be filled with the path, with a trailing /,
// null-terminated, and 0 is returned.
// On failure, EINVAL, ENAMETOOLONG, or one of the errors access() can return
// is returned, and the contents of buf is unspecified.
static int
tryTempDir (char *buf, size_t buflen, const char *dir)
{
size_t len;
int haveSlash;
if (dir == NULL)
return EINVAL;
if (dir[0] == '\0')
return EINVAL;
len = strlen (dir);
haveSlash = (dir[len - 1] == '/'
#ifdef WIN32
|| dir[len - 1] == '\\'
#endif
);
if ((haveSlash ? len : len + 1) >= buflen)
return ENAMETOOLONG;
strcpy (buf, dir);
#if 0
//def WIN32
{
char *bufPtr;
for (bufPtr = buf; *bufPtr != '\0'; bufPtr++)
{
if (*bufPtr == '\\')
*bufPtr = '/';
}
}
#endif
if (!haveSlash)
{
buf[len] = '/';
len++;
buf[len] = '\0';
}
if (access (buf, R_OK | W_OK) == -1)
return errno;
return 0;
}
static void
getTempDir (char *buf, size_t buflen) {
char cwd[PATH_MAX];
if (tryTempDir (buf, buflen, getenv("TMP")) &&
tryTempDir (buf, buflen, getenv("TEMP")) &&
#if !defined(WIN32) || defined (__CYGWIN__)
tryTempDir (buf, buflen, "/tmp/") &&
tryTempDir (buf, buflen, "/var/tmp/") &&
#endif
tryTempDir (buf, buflen, getcwd (cwd, sizeof cwd)))
{
log_add (log_Fatal, "Fatal Error: Cannot find a suitable location "
"to store temporary files.");
exit (EXIT_FAILURE);
}
}
// Sets the global var 'tempDir'
static int
mountTempDir(const char *name) {
static uio_AutoMount *autoMount[] = { NULL };
uio_MountHandle *tempHandle;
extern uio_Repository *repository;
tempHandle = uio_mountDir (repository, "/tmp/",
uio_FSTYPE_STDIO, NULL, NULL, name, autoMount,
uio_MOUNT_TOP, NULL);
if (tempHandle == NULL) {
int saveErrno = errno;
log_add (log_Fatal, "Fatal error: Couldn't mount temp dir '%s': "
"%s", name, strerror (errno));
errno = saveErrno;
return -1;
}
tempDir = uio_openDir (repository, "/tmp", 0);
if (tempDir == NULL) {
int saveErrno = errno;
log_add (log_Fatal, "Fatal error: Could not open temp dir: %s",
strerror (errno));
errno = saveErrno;
return -1;
}
return 0;
}
#define NUM_TEMP_RETRIES 16
// Number of files to try to open before giving up.
void
initTempDir (void) {
size_t len;
DWORD num;
int i;
char *tempPtr;
// Pointer to the location in the tempDirName string where the
// path to the temp dir ends and the dir starts.
tempDirName = HMalloc (PATH_MAX);
getTempDir (tempDirName, PATH_MAX - 21);
// reserve 8 chars for dirname, 1 for slash, and 12 for filename
len = strlen(tempDirName);
num = ((DWORD) time (NULL));
// num = GetTimeCounter () % 0xffffffff;
tempPtr = tempDirName + len;
for (i = 0; i < NUM_TEMP_RETRIES; i++)
{
sprintf (tempPtr, "%08x", num + i);
if (createDirectory (tempDirName, 0700) == -1)
continue;
// Success, we've got a temp dir.
tempDirName = HRealloc (tempDirName, len + 9);
atexit (removeTempDir);
if (mountTempDir (tempDirName) == -1)
exit (EXIT_FAILURE);
return;
}
// Failure, could not make a temporary directory.
log_add (log_Fatal, "Fatal error: Cannot get a name for a temporary "
"directory.");
exit (EXIT_FAILURE);
}
void
unInitTempDir (void) {
uio_closeDir(tempDir);
// the removing of the dir is handled via atexit
}
// return the path to a file in the temp dir with the specified filename.
// returns a pointer to a static buffer.
char *
tempFilePath (const char *filename) {
static char file[PATH_MAX];
if (snprintf (file, PATH_MAX, "%s/%s", tempDirName, filename) == -1) {
log_add (log_Fatal, "Path to temp file too long.");
exit (EXIT_FAILURE);
}
return file;
}
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