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Commit | Line | Data |
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ef416fc2 | 1 | /* |
07623986 | 2 | * Temp file utilities for CUPS. |
ef416fc2 | 3 | * |
07623986 MS |
4 | * Copyright 2007-2014 by Apple Inc. |
5 | * Copyright 1997-2006 by Easy Software Products. | |
ef416fc2 | 6 | * |
e3101897 | 7 | * Licensed under Apache License v2.0. See the file "LICENSE" for more information. |
ef416fc2 | 8 | */ |
9 | ||
10 | /* | |
11 | * Include necessary headers... | |
12 | */ | |
13 | ||
71e16022 | 14 | #include "cups-private.h" |
ef416fc2 | 15 | #include <stdlib.h> |
ef416fc2 | 16 | #include <fcntl.h> |
17 | #include <sys/stat.h> | |
18 | #if defined(WIN32) || defined(__EMX__) | |
19 | # include <io.h> | |
20 | #else | |
21 | # include <unistd.h> | |
22 | #endif /* WIN32 || __EMX__ */ | |
23 | ||
24 | ||
25 | /* | |
2abf387c | 26 | * 'cupsTempFd()' - Creates a temporary file. |
ef416fc2 | 27 | * |
2abf387c | 28 | * The temporary filename is returned in the filename buffer. |
29 | * The temporary file is opened for reading and writing. | |
ef416fc2 | 30 | */ |
31 | ||
2abf387c | 32 | int /* O - New file descriptor or -1 on error */ |
ef416fc2 | 33 | cupsTempFd(char *filename, /* I - Pointer to buffer */ |
34 | int len) /* I - Size of buffer */ | |
35 | { | |
36 | int fd; /* File descriptor for temp file */ | |
37 | int tries; /* Number of tries */ | |
38 | const char *tmpdir; /* TMPDIR environment var */ | |
39 | #ifdef WIN32 | |
40 | char tmppath[1024]; /* Windows temporary directory */ | |
41 | DWORD curtime; /* Current time */ | |
42 | #else | |
43 | struct timeval curtime; /* Current time */ | |
44 | #endif /* WIN32 */ | |
45 | ||
46 | ||
47 | /* | |
48 | * See if TMPDIR is defined... | |
49 | */ | |
50 | ||
51 | #ifdef WIN32 | |
52 | if ((tmpdir = getenv("TEMP")) == NULL) | |
53 | { | |
54 | GetTempPath(sizeof(tmppath), tmppath); | |
55 | tmpdir = tmppath; | |
56 | } | |
57 | #else | |
09a101d6 | 58 | /* |
59 | * Previously we put root temporary files in the default CUPS temporary | |
60 | * directory under /var/spool/cups. However, since the scheduler cleans | |
61 | * out temporary files there and runs independently of the user apps, we | |
62 | * don't want to use it unless specifically told to by cupsd. | |
63 | */ | |
ef416fc2 | 64 | |
09a101d6 | 65 | if ((tmpdir = getenv("TMPDIR")) == NULL) |
879ee463 | 66 | # if defined(__APPLE__) && !TARGET_OS_IOS |
09a101d6 | 67 | tmpdir = "/private/tmp"; /* /tmp is a symlink to /private/tmp */ |
68 | # else | |
69 | tmpdir = "/tmp"; | |
879ee463 | 70 | # endif /* __APPLE__ && !TARGET_OS_IOS */ |
ef416fc2 | 71 | #endif /* WIN32 */ |
72 | ||
73 | /* | |
74 | * Make the temporary name using the specified directory... | |
75 | */ | |
76 | ||
77 | tries = 0; | |
78 | ||
79 | do | |
80 | { | |
81 | #ifdef WIN32 | |
82 | /* | |
83 | * Get the current time of day... | |
84 | */ | |
85 | ||
86 | curtime = GetTickCount() + tries; | |
87 | ||
88 | /* | |
89 | * Format a string using the hex time values... | |
90 | */ | |
91 | ||
07623986 | 92 | snprintf(filename, (size_t)len - 1, "%s/%05lx%08lx", tmpdir, GetCurrentProcessId(), curtime); |
ef416fc2 | 93 | #else |
94 | /* | |
95 | * Get the current time of day... | |
96 | */ | |
97 | ||
98 | gettimeofday(&curtime, NULL); | |
99 | ||
100 | /* | |
101 | * Format a string using the hex time values... | |
102 | */ | |
103 | ||
07623986 | 104 | snprintf(filename, (size_t)len - 1, "%s/%05x%08x", tmpdir, (unsigned)getpid(), (unsigned)(curtime.tv_sec + curtime.tv_usec + tries)); |
ef416fc2 | 105 | #endif /* WIN32 */ |
106 | ||
107 | /* | |
108 | * Open the file in "exclusive" mode, making sure that we don't | |
109 | * stomp on an existing file or someone's symlink crack... | |
110 | */ | |
111 | ||
112 | #ifdef WIN32 | |
113 | fd = open(filename, _O_CREAT | _O_RDWR | _O_TRUNC | _O_BINARY, | |
114 | _S_IREAD | _S_IWRITE); | |
115 | #elif defined(O_NOFOLLOW) | |
116 | fd = open(filename, O_RDWR | O_CREAT | O_EXCL | O_NOFOLLOW, 0600); | |
117 | #else | |
118 | fd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600); | |
119 | #endif /* WIN32 */ | |
120 | ||
121 | if (fd < 0 && errno != EEXIST) | |
122 | break; | |
123 | ||
124 | tries ++; | |
125 | } | |
126 | while (fd < 0 && tries < 1000); | |
127 | ||
128 | /* | |
129 | * Return the file descriptor... | |
130 | */ | |
131 | ||
132 | return (fd); | |
133 | } | |
134 | ||
135 | ||
136 | /* | |
2abf387c | 137 | * 'cupsTempFile()' - Generates a temporary filename. |
ef416fc2 | 138 | * |
2abf387c | 139 | * The temporary filename is returned in the filename buffer. |
240214ef MS |
140 | * This function is deprecated and will no longer generate a temporary |
141 | * filename - use @link cupsTempFd@ or @link cupsTempFile2@ instead. | |
ef416fc2 | 142 | * |
143 | * @deprecated@ | |
144 | */ | |
145 | ||
568fa3fa | 146 | char * /* O - Filename or @code NULL@ on error */ |
ef416fc2 | 147 | cupsTempFile(char *filename, /* I - Pointer to buffer */ |
148 | int len) /* I - Size of buffer */ | |
149 | { | |
240214ef | 150 | (void)len; |
ef416fc2 | 151 | |
240214ef MS |
152 | if (filename) |
153 | *filename = '\0'; | |
ef416fc2 | 154 | |
240214ef | 155 | return (NULL); |
ef416fc2 | 156 | } |
157 | ||
158 | ||
159 | /* | |
2abf387c | 160 | * 'cupsTempFile2()' - Creates a temporary CUPS file. |
ef416fc2 | 161 | * |
2abf387c | 162 | * The temporary filename is returned in the filename buffer. |
163 | * The temporary file is opened for writing. | |
ef416fc2 | 164 | * |
8072030b | 165 | * @since CUPS 1.2/macOS 10.5@ |
ef416fc2 | 166 | */ |
167 | ||
568fa3fa | 168 | cups_file_t * /* O - CUPS file or @code NULL@ on error */ |
ef416fc2 | 169 | cupsTempFile2(char *filename, /* I - Pointer to buffer */ |
170 | int len) /* I - Size of buffer */ | |
171 | { | |
172 | cups_file_t *file; /* CUPS file */ | |
173 | int fd; /* File descriptor */ | |
174 | ||
175 | ||
176 | if ((fd = cupsTempFd(filename, len)) < 0) | |
177 | return (NULL); | |
178 | else if ((file = cupsFileOpenFd(fd, "w")) == NULL) | |
179 | { | |
180 | close(fd); | |
181 | unlink(filename); | |
182 | return (NULL); | |
183 | } | |
184 | else | |
185 | return (file); | |
186 | } |