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/*
* "$Id: tempfile.c 6040 2006-10-17 02:24:49Z mike $"
*
* Temp file utilities for the Common UNIX Printing System (CUPS).
*
* Copyright 1997-2006 by Easy Software Products.
*
* These coded instructions, statements, and computer programs are the
* property of Easy Software Products and are protected by Federal
* copyright law. Distribution and use rights are outlined in the file
* "LICENSE.txt" which should have been included with this file. If this
* file is missing or damaged please contact Easy Software Products
* at:
*
* Attn: CUPS Licensing Information
* Easy Software Products
* 44141 Airport View Drive, Suite 204
* Hollywood, Maryland 20636 USA
*
* Voice: (301) 373-9600
* EMail: cups-info@cups.org
* WWW: http://www.cups.org
*
* This file is subject to the Apple OS-Developed Software exception.
*
* Contents:
*
* cupsTempFd() - Creates a temporary file.
* cupsTempFile() - Generates a temporary filename.
* cupsTempFile2() - Creates a temporary CUPS file.
*/
/*
* Include necessary headers...
*/
#include "globals.h"
#include "debug.h"
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#if defined(WIN32) || defined(__EMX__)
# include <io.h>
#else
# include <unistd.h>
#endif /* WIN32 || __EMX__ */
/*
* 'cupsTempFd()' - Creates a temporary file.
*
* The temporary filename is returned in the filename buffer.
* The temporary file is opened for reading and writing.
*/
int /* O - New file descriptor or -1 on error */
cupsTempFd(char *filename, /* I - Pointer to buffer */
int len) /* I - Size of buffer */
{
int fd; /* File descriptor for temp file */
int tries; /* Number of tries */
const char *tmpdir; /* TMPDIR environment var */
#ifdef WIN32
char tmppath[1024]; /* Windows temporary directory */
DWORD curtime; /* Current time */
#else
struct timeval curtime; /* Current time */
#endif /* WIN32 */
/*
* See if TMPDIR is defined...
*/
#ifdef WIN32
if ((tmpdir = getenv("TEMP")) == NULL)
{
GetTempPath(sizeof(tmppath), tmppath);
tmpdir = tmppath;
}
#else
if ((tmpdir = getenv("TMPDIR")) == NULL)
{
/*
* Put root temp files in restricted temp directory...
*/
if (getuid() == 0)
tmpdir = CUPS_REQUESTS "/tmp";
else
tmpdir = "/tmp";
}
#endif /* WIN32 */
/*
* Make the temporary name using the specified directory...
*/
tries = 0;
do
{
#ifdef WIN32
/*
* Get the current time of day...
*/
curtime = GetTickCount() + tries;
/*
* Format a string using the hex time values...
*/
snprintf(filename, len - 1, "%s/%05lx%08lx", tmpdir,
GetCurrentProcessId(), curtime);
#else
/*
* Get the current time of day...
*/
gettimeofday(&curtime, NULL);
/*
* Format a string using the hex time values...
*/
snprintf(filename, len - 1, "%s/%08lx%05lx", tmpdir,
(unsigned long)curtime.tv_sec, (unsigned long)curtime.tv_usec);
#endif /* WIN32 */
/*
* Open the file in "exclusive" mode, making sure that we don't
* stomp on an existing file or someone's symlink crack...
*/
#ifdef WIN32
fd = open(filename, _O_CREAT | _O_RDWR | _O_TRUNC | _O_BINARY,
_S_IREAD | _S_IWRITE);
#elif defined(O_NOFOLLOW)
fd = open(filename, O_RDWR | O_CREAT | O_EXCL | O_NOFOLLOW, 0600);
#else
fd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600);
#endif /* WIN32 */
if (fd < 0 && errno != EEXIST)
break;
tries ++;
}
while (fd < 0 && tries < 1000);
/*
* Return the file descriptor...
*/
return (fd);
}
/*
* 'cupsTempFile()' - Generates a temporary filename.
*
* The temporary filename is returned in the filename buffer.
* This function is deprecated - use cupsTempFd() or cupsTempFile2()
* instead.
*
* @deprecated@
*/
char * /* O - Filename or NULL on error */
cupsTempFile(char *filename, /* I - Pointer to buffer */
int len) /* I - Size of buffer */
{
int fd; /* File descriptor for temp file */
_cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */
/*
* See if a filename was specified...
*/
if (filename == NULL)
{
filename = cg->tempfile;
len = sizeof(cg->tempfile);
}
/*
* Create the temporary file...
*/
if ((fd = cupsTempFd(filename, len)) < 0)
return (NULL);
/*
* Close the temp file - it'll be reopened later as needed...
*/
close(fd);
/*
* Return the temp filename...
*/
return (filename);
}
/*
* 'cupsTempFile2()' - Creates a temporary CUPS file.
*
* The temporary filename is returned in the filename buffer.
* The temporary file is opened for writing.
*
* @since CUPS 1.2@
*/
cups_file_t * /* O - CUPS file or NULL on error */
cupsTempFile2(char *filename, /* I - Pointer to buffer */
int len) /* I - Size of buffer */
{
cups_file_t *file; /* CUPS file */
int fd; /* File descriptor */
if ((fd = cupsTempFd(filename, len)) < 0)
return (NULL);
else if ((file = cupsFileOpenFd(fd, "w")) == NULL)
{
close(fd);
unlink(filename);
return (NULL);
}
else
return (file);
}
/*
* End of "$Id: tempfile.c 6040 2006-10-17 02:24:49Z mike $".
*/
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