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Commit | Line | Data |
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ef416fc2 | 1 | /* |
f2d18633 | 2 | * "$Id$" |
ef416fc2 | 3 | * |
71e16022 | 4 | * Temp file utilities for CUPS. |
ef416fc2 | 5 | * |
f3c17241 | 6 | * Copyright 2007-2012 by Apple Inc. |
2abf387c | 7 | * Copyright 1997-2006 by Easy Software Products. |
ef416fc2 | 8 | * |
9 | * These coded instructions, statements, and computer programs are the | |
bc44d920 | 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/". | |
ef416fc2 | 14 | * |
15 | * This file is subject to the Apple OS-Developed Software exception. | |
16 | * | |
17 | * Contents: | |
18 | * | |
2abf387c | 19 | * cupsTempFd() - Creates a temporary file. |
20 | * cupsTempFile() - Generates a temporary filename. | |
21 | * cupsTempFile2() - Creates a temporary CUPS file. | |
ef416fc2 | 22 | */ |
23 | ||
24 | /* | |
25 | * Include necessary headers... | |
26 | */ | |
27 | ||
71e16022 | 28 | #include "cups-private.h" |
ef416fc2 | 29 | #include <stdlib.h> |
ef416fc2 | 30 | #include <fcntl.h> |
31 | #include <sys/stat.h> | |
32 | #if defined(WIN32) || defined(__EMX__) | |
33 | # include <io.h> | |
34 | #else | |
35 | # include <unistd.h> | |
36 | #endif /* WIN32 || __EMX__ */ | |
37 | ||
38 | ||
39 | /* | |
2abf387c | 40 | * 'cupsTempFd()' - Creates a temporary file. |
ef416fc2 | 41 | * |
2abf387c | 42 | * The temporary filename is returned in the filename buffer. |
43 | * The temporary file is opened for reading and writing. | |
ef416fc2 | 44 | */ |
45 | ||
2abf387c | 46 | int /* O - New file descriptor or -1 on error */ |
ef416fc2 | 47 | cupsTempFd(char *filename, /* I - Pointer to buffer */ |
48 | int len) /* I - Size of buffer */ | |
49 | { | |
50 | int fd; /* File descriptor for temp file */ | |
51 | int tries; /* Number of tries */ | |
52 | const char *tmpdir; /* TMPDIR environment var */ | |
53 | #ifdef WIN32 | |
54 | char tmppath[1024]; /* Windows temporary directory */ | |
55 | DWORD curtime; /* Current time */ | |
56 | #else | |
57 | struct timeval curtime; /* Current time */ | |
58 | #endif /* WIN32 */ | |
59 | ||
60 | ||
61 | /* | |
62 | * See if TMPDIR is defined... | |
63 | */ | |
64 | ||
65 | #ifdef WIN32 | |
66 | if ((tmpdir = getenv("TEMP")) == NULL) | |
67 | { | |
68 | GetTempPath(sizeof(tmppath), tmppath); | |
69 | tmpdir = tmppath; | |
70 | } | |
71 | #else | |
09a101d6 | 72 | /* |
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. | |
77 | */ | |
ef416fc2 | 78 | |
09a101d6 | 79 | if ((tmpdir = getenv("TMPDIR")) == NULL) |
80 | # ifdef __APPLE__ | |
81 | tmpdir = "/private/tmp"; /* /tmp is a symlink to /private/tmp */ | |
82 | # else | |
83 | tmpdir = "/tmp"; | |
84 | # endif /* __APPLE__ */ | |
ef416fc2 | 85 | #endif /* WIN32 */ |
86 | ||
87 | /* | |
88 | * Make the temporary name using the specified directory... | |
89 | */ | |
90 | ||
91 | tries = 0; | |
92 | ||
93 | do | |
94 | { | |
95 | #ifdef WIN32 | |
96 | /* | |
97 | * Get the current time of day... | |
98 | */ | |
99 | ||
100 | curtime = GetTickCount() + tries; | |
101 | ||
102 | /* | |
103 | * Format a string using the hex time values... | |
104 | */ | |
105 | ||
106 | snprintf(filename, len - 1, "%s/%05lx%08lx", tmpdir, | |
107 | GetCurrentProcessId(), curtime); | |
108 | #else | |
109 | /* | |
110 | * Get the current time of day... | |
111 | */ | |
112 | ||
113 | gettimeofday(&curtime, NULL); | |
114 | ||
115 | /* | |
116 | * Format a string using the hex time values... | |
117 | */ | |
118 | ||
f8b3a85b MS |
119 | snprintf(filename, len - 1, "%s/%05x%08x", tmpdir, (unsigned)getpid(), |
120 | (unsigned)(curtime.tv_sec + curtime.tv_usec + tries)); | |
ef416fc2 | 121 | #endif /* WIN32 */ |
122 | ||
123 | /* | |
124 | * Open the file in "exclusive" mode, making sure that we don't | |
125 | * stomp on an existing file or someone's symlink crack... | |
126 | */ | |
127 | ||
128 | #ifdef WIN32 | |
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); | |
133 | #else | |
134 | fd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600); | |
135 | #endif /* WIN32 */ | |
136 | ||
137 | if (fd < 0 && errno != EEXIST) | |
138 | break; | |
139 | ||
140 | tries ++; | |
141 | } | |
142 | while (fd < 0 && tries < 1000); | |
143 | ||
144 | /* | |
145 | * Return the file descriptor... | |
146 | */ | |
147 | ||
148 | return (fd); | |
149 | } | |
150 | ||
151 | ||
152 | /* | |
2abf387c | 153 | * 'cupsTempFile()' - Generates a temporary filename. |
ef416fc2 | 154 | * |
2abf387c | 155 | * The temporary filename is returned in the filename buffer. |
5a738aea MS |
156 | * This function is deprecated - use @link cupsTempFd@ or |
157 | * @link cupsTempFile2@ instead. | |
ef416fc2 | 158 | * |
159 | * @deprecated@ | |
160 | */ | |
161 | ||
568fa3fa | 162 | char * /* O - Filename or @code NULL@ on error */ |
ef416fc2 | 163 | cupsTempFile(char *filename, /* I - Pointer to buffer */ |
164 | int len) /* I - Size of buffer */ | |
165 | { | |
166 | int fd; /* File descriptor for temp file */ | |
167 | _cups_globals_t *cg = _cupsGlobals(); /* Pointer to library globals */ | |
168 | ||
169 | ||
170 | /* | |
171 | * See if a filename was specified... | |
172 | */ | |
173 | ||
174 | if (filename == NULL) | |
175 | { | |
176 | filename = cg->tempfile; | |
177 | len = sizeof(cg->tempfile); | |
178 | } | |
179 | ||
180 | /* | |
181 | * Create the temporary file... | |
182 | */ | |
183 | ||
184 | if ((fd = cupsTempFd(filename, len)) < 0) | |
185 | return (NULL); | |
186 | ||
187 | /* | |
188 | * Close the temp file - it'll be reopened later as needed... | |
189 | */ | |
190 | ||
191 | close(fd); | |
192 | ||
193 | /* | |
194 | * Return the temp filename... | |
195 | */ | |
196 | ||
197 | return (filename); | |
198 | } | |
199 | ||
200 | ||
201 | /* | |
2abf387c | 202 | * 'cupsTempFile2()' - Creates a temporary CUPS file. |
ef416fc2 | 203 | * |
2abf387c | 204 | * The temporary filename is returned in the filename buffer. |
205 | * The temporary file is opened for writing. | |
ef416fc2 | 206 | * |
f3c17241 | 207 | * @since CUPS 1.2/OS X 10.5@ |
ef416fc2 | 208 | */ |
209 | ||
568fa3fa | 210 | cups_file_t * /* O - CUPS file or @code NULL@ on error */ |
ef416fc2 | 211 | cupsTempFile2(char *filename, /* I - Pointer to buffer */ |
212 | int len) /* I - Size of buffer */ | |
213 | { | |
214 | cups_file_t *file; /* CUPS file */ | |
215 | int fd; /* File descriptor */ | |
216 | ||
217 | ||
218 | if ((fd = cupsTempFd(filename, len)) < 0) | |
219 | return (NULL); | |
220 | else if ((file = cupsFileOpenFd(fd, "w")) == NULL) | |
221 | { | |
222 | close(fd); | |
223 | unlink(filename); | |
224 | return (NULL); | |
225 | } | |
226 | else | |
227 | return (file); | |
228 | } | |
229 | ||
230 | ||
231 | /* | |
f2d18633 | 232 | * End of "$Id$". |
ef416fc2 | 233 | */ |