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git.ipfire.org Git - thirdparty/cups.git/blob - cups/tempfile.c
2 * Temp file utilities for CUPS.
4 * Copyright 2007-2014 by Apple Inc.
5 * Copyright 1997-2006 by Easy Software Products.
7 * These coded instructions, statements, and computer programs are the
8 * property of Apple Inc. and are protected by Federal copyright
9 * law. Distribution and use rights are outlined in the file "LICENSE.txt"
10 * which should have been included with this file. If this file is
11 * file is missing or damaged, see the license at "http://www.cups.org/".
13 * This file is subject to the Apple OS-Developed Software exception.
17 * Include necessary headers...
20 #include "cups-private.h"
24 #if defined(WIN32) || defined(__EMX__)
28 #endif /* WIN32 || __EMX__ */
32 * 'cupsTempFd()' - Creates a temporary file.
34 * The temporary filename is returned in the filename buffer.
35 * The temporary file is opened for reading and writing.
38 int /* O - New file descriptor or -1 on error */
39 cupsTempFd(char *filename
, /* I - Pointer to buffer */
40 int len
) /* I - Size of buffer */
42 int fd
; /* File descriptor for temp file */
43 int tries
; /* Number of tries */
44 const char *tmpdir
; /* TMPDIR environment var */
46 char tmppath
[1024]; /* Windows temporary directory */
47 DWORD curtime
; /* Current time */
49 struct timeval curtime
; /* Current time */
54 * See if TMPDIR is defined...
58 if ((tmpdir
= getenv("TEMP")) == NULL
)
60 GetTempPath(sizeof(tmppath
), tmppath
);
65 * Previously we put root temporary files in the default CUPS temporary
66 * directory under /var/spool/cups. However, since the scheduler cleans
67 * out temporary files there and runs independently of the user apps, we
68 * don't want to use it unless specifically told to by cupsd.
71 if ((tmpdir
= getenv("TMPDIR")) == NULL
)
72 # if defined(__APPLE__) && !TARGET_OS_IOS
73 tmpdir
= "/private/tmp"; /* /tmp is a symlink to /private/tmp */
76 # endif /* __APPLE__ && !TARGET_OS_IOS */
80 * Make the temporary name using the specified directory...
89 * Get the current time of day...
92 curtime
= GetTickCount() + tries
;
95 * Format a string using the hex time values...
98 snprintf(filename
, (size_t)len
- 1, "%s/%05lx%08lx", tmpdir
, GetCurrentProcessId(), curtime
);
101 * Get the current time of day...
104 gettimeofday(&curtime
, NULL
);
107 * Format a string using the hex time values...
110 snprintf(filename
, (size_t)len
- 1, "%s/%05x%08x", tmpdir
, (unsigned)getpid(), (unsigned)(curtime
.tv_sec
+ curtime
.tv_usec
+ tries
));
114 * Open the file in "exclusive" mode, making sure that we don't
115 * stomp on an existing file or someone's symlink crack...
119 fd
= open(filename
, _O_CREAT
| _O_RDWR
| _O_TRUNC
| _O_BINARY
,
120 _S_IREAD
| _S_IWRITE
);
121 #elif defined(O_NOFOLLOW)
122 fd
= open(filename
, O_RDWR
| O_CREAT
| O_EXCL
| O_NOFOLLOW
, 0600);
124 fd
= open(filename
, O_RDWR
| O_CREAT
| O_EXCL
, 0600);
127 if (fd
< 0 && errno
!= EEXIST
)
132 while (fd
< 0 && tries
< 1000);
135 * Return the file descriptor...
143 * 'cupsTempFile()' - Generates a temporary filename.
145 * The temporary filename is returned in the filename buffer.
146 * This function is deprecated and will no longer generate a temporary
147 * filename - use @link cupsTempFd@ or @link cupsTempFile2@ instead.
152 char * /* O - Filename or @code NULL@ on error */
153 cupsTempFile(char *filename
, /* I - Pointer to buffer */
154 int len
) /* I - Size of buffer */
166 * 'cupsTempFile2()' - Creates a temporary CUPS file.
168 * The temporary filename is returned in the filename buffer.
169 * The temporary file is opened for writing.
171 * @since CUPS 1.2/macOS 10.5@
174 cups_file_t
* /* O - CUPS file or @code NULL@ on error */
175 cupsTempFile2(char *filename
, /* I - Pointer to buffer */
176 int len
) /* I - Size of buffer */
178 cups_file_t
*file
; /* CUPS file */
179 int fd
; /* File descriptor */
182 if ((fd
= cupsTempFd(filename
, len
)) < 0)
184 else if ((file
= cupsFileOpenFd(fd
, "w")) == NULL
)