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git.ipfire.org Git - thirdparty/cups.git/blob - cups/tempfile.c
4 * Temp file utilities for CUPS.
6 * Copyright 2007-2012 by Apple Inc.
7 * Copyright 1997-2006 by Easy Software Products.
9 * These coded instructions, statements, and computer programs are the
10 * property of Apple Inc. and are protected by Federal copyright
11 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
12 * which should have been included with this file. If this file is
13 * file is missing or damaged, see the license at "http://www.cups.org/".
15 * This file is subject to the Apple OS-Developed Software exception.
19 * cupsTempFd() - Creates a temporary file.
20 * cupsTempFile() - Generates a temporary filename.
21 * cupsTempFile2() - Creates a temporary CUPS file.
25 * Include necessary headers...
28 #include "cups-private.h"
32 #if defined(WIN32) || defined(__EMX__)
36 #endif /* WIN32 || __EMX__ */
40 * 'cupsTempFd()' - Creates a temporary file.
42 * The temporary filename is returned in the filename buffer.
43 * The temporary file is opened for reading and writing.
46 int /* O - New file descriptor or -1 on error */
47 cupsTempFd(char *filename
, /* I - Pointer to buffer */
48 int len
) /* I - Size of buffer */
50 int fd
; /* File descriptor for temp file */
51 int tries
; /* Number of tries */
52 const char *tmpdir
; /* TMPDIR environment var */
54 char tmppath
[1024]; /* Windows temporary directory */
55 DWORD curtime
; /* Current time */
57 struct timeval curtime
; /* Current time */
62 * See if TMPDIR is defined...
66 if ((tmpdir
= getenv("TEMP")) == NULL
)
68 GetTempPath(sizeof(tmppath
), tmppath
);
73 * Previously we put root temporary files in the default CUPS temporary
74 * directory under /var/spool/cups. However, since the scheduler cleans
75 * out temporary files there and runs independently of the user apps, we
76 * don't want to use it unless specifically told to by cupsd.
79 if ((tmpdir
= getenv("TMPDIR")) == NULL
)
81 tmpdir
= "/private/tmp"; /* /tmp is a symlink to /private/tmp */
84 # endif /* __APPLE__ */
88 * Make the temporary name using the specified directory...
97 * Get the current time of day...
100 curtime
= GetTickCount() + tries
;
103 * Format a string using the hex time values...
106 snprintf(filename
, len
- 1, "%s/%05lx%08lx", tmpdir
,
107 GetCurrentProcessId(), curtime
);
110 * Get the current time of day...
113 gettimeofday(&curtime
, NULL
);
116 * Format a string using the hex time values...
119 snprintf(filename
, len
- 1, "%s/%05x%08x", tmpdir
, (unsigned)getpid(),
120 (unsigned)(curtime
.tv_sec
+ curtime
.tv_usec
+ tries
));
124 * Open the file in "exclusive" mode, making sure that we don't
125 * stomp on an existing file or someone's symlink crack...
129 fd
= open(filename
, _O_CREAT
| _O_RDWR
| _O_TRUNC
| _O_BINARY
,
130 _S_IREAD
| _S_IWRITE
);
131 #elif defined(O_NOFOLLOW)
132 fd
= open(filename
, O_RDWR
| O_CREAT
| O_EXCL
| O_NOFOLLOW
, 0600);
134 fd
= open(filename
, O_RDWR
| O_CREAT
| O_EXCL
, 0600);
137 if (fd
< 0 && errno
!= EEXIST
)
142 while (fd
< 0 && tries
< 1000);
145 * Return the file descriptor...
153 * 'cupsTempFile()' - Generates a temporary filename.
155 * The temporary filename is returned in the filename buffer.
156 * This function is deprecated - use @link cupsTempFd@ or
157 * @link cupsTempFile2@ instead.
162 char * /* O - Filename or @code NULL@ on error */
163 cupsTempFile(char *filename
, /* I - Pointer to buffer */
164 int len
) /* I - Size of buffer */
166 int fd
; /* File descriptor for temp file */
167 _cups_globals_t
*cg
= _cupsGlobals(); /* Pointer to library globals */
171 * See if a filename was specified...
174 if (filename
== NULL
)
176 filename
= cg
->tempfile
;
177 len
= sizeof(cg
->tempfile
);
181 * Create the temporary file...
184 if ((fd
= cupsTempFd(filename
, len
)) < 0)
188 * Close the temp file - it'll be reopened later as needed...
194 * Return the temp filename...
202 * 'cupsTempFile2()' - Creates a temporary CUPS file.
204 * The temporary filename is returned in the filename buffer.
205 * The temporary file is opened for writing.
207 * @since CUPS 1.2/OS X 10.5@
210 cups_file_t
* /* O - CUPS file or @code NULL@ on error */
211 cupsTempFile2(char *filename
, /* I - Pointer to buffer */
212 int len
) /* I - Size of buffer */
214 cups_file_t
*file
; /* CUPS file */
215 int fd
; /* File descriptor */
218 if ((fd
= cupsTempFd(filename
, len
)) < 0)
220 else if ((file
= cupsFileOpenFd(fd
, "w")) == NULL
)