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1 | .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
2 | .\" | |
93015253 | 3 | .\" %%%LICENSE_START(VERBATIM) |
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4 | .\" Permission is granted to make and distribute verbatim copies of this |
5 | .\" manual provided the copyright notice and this permission notice are | |
6 | .\" preserved on all copies. | |
7 | .\" | |
8 | .\" Permission is granted to copy and distribute modified versions of this | |
9 | .\" manual under the conditions for verbatim copying, provided that the | |
10 | .\" entire resulting derived work is distributed under the terms of a | |
11 | .\" permission notice identical to this one. | |
c13182ef | 12 | .\" |
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13 | .\" Since the Linux kernel and libraries are constantly changing, this |
14 | .\" manual page may be incorrect or out-of-date. The author(s) assume no | |
15 | .\" responsibility for errors or omissions, or for damages resulting from | |
16 | .\" the use of the information contained herein. The author(s) may not | |
17 | .\" have taken the same level of care in the production of this manual, | |
18 | .\" which is licensed free of charge, as they might when working | |
19 | .\" professionally. | |
c13182ef | 20 | .\" |
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21 | .\" Formatted or processed versions of this manual, if unaccompanied by |
22 | .\" the source, must acknowledge the copyright and authors of this work. | |
4b72fb64 | 23 | .\" %%%LICENSE_END |
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24 | .\" |
25 | .\" References consulted: | |
26 | .\" Linux libc source code | |
27 | .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) | |
28 | .\" 386BSD man pages | |
29 | .\" Modified Sat Jul 24 17:46:57 1993 by Rik Faith (faith@cs.unc.edu) | |
30 | .\" Modified 2001-11-17, aeb | |
97986708 | 31 | .TH TMPFILE 3 2016-03-15 "" "Linux Programmer's Manual" |
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32 | .SH NAME |
33 | tmpfile \- create a temporary file | |
34 | .SH SYNOPSIS | |
35 | .nf | |
36 | .B #include <stdio.h> | |
68e4db0a | 37 | .PP |
18a2cc04 | 38 | .B FILE *tmpfile(void); |
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39 | .fi |
40 | .SH DESCRIPTION | |
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41 | The |
42 | .BR tmpfile () | |
43 | function opens a unique temporary file | |
af8d55f9 | 44 | in binary read/write (w+b) mode. |
fea681da | 45 | The file will be automatically deleted when it is closed or the |
af8d55f9 | 46 | program terminates. |
47297adb | 47 | .SH RETURN VALUE |
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48 | The |
49 | .BR tmpfile () | |
50 | function returns a stream descriptor, or NULL if | |
fea681da | 51 | a unique filename cannot be generated or the unique file cannot be |
c13182ef | 52 | opened. |
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53 | In the latter case, |
54 | .I errno | |
55 | is set to indicate the error. | |
fea681da | 56 | .SH ERRORS |
c13182ef | 57 | .TP |
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58 | .B EACCES |
59 | Search permission denied for directory in file's path prefix. | |
60 | .TP | |
61 | .B EEXIST | |
62 | Unable to generate a unique filename. | |
63 | .TP | |
64 | .B EINTR | |
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65 | The call was interrupted by a signal; see |
66 | .BR signal (7). | |
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67 | .TP |
68 | .B EMFILE | |
26c32fab | 69 | The per-process limit on the number of open file descriptors has been reached. |
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70 | .TP |
71 | .B ENFILE | |
e258766b | 72 | The system-wide limit on the total number of open files has been reached. |
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73 | .TP |
74 | .B ENOSPC | |
75 | There was no room in the directory to add the new filename. | |
76 | .TP | |
77 | .B EROFS | |
9ee4a2b6 | 78 | Read-only filesystem. |
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79 | .SH ATTRIBUTES |
80 | For an explanation of the terms used in this section, see | |
81 | .BR attributes (7). | |
82 | .TS | |
83 | allbox; | |
84 | lb lb lb | |
85 | l l l. | |
86 | Interface Attribute Value | |
87 | T{ | |
88 | .BR tmpfile () | |
89 | T} Thread safety MT-Safe | |
90 | .TE | |
47297adb | 91 | .SH CONFORMING TO |
9ac35429 | 92 | POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD, SUSv2. |
fea681da | 93 | .SH NOTES |
47e9b9f1 | 94 | POSIX.1-2001 specifies: |
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95 | an error message may be written to |
96 | .I stdout | |
97 | if the stream | |
fea681da | 98 | cannot be opened. |
dd3568a1 | 99 | .PP |
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100 | The standard does not specify the directory that |
101 | .BR tmpfile () | |
c13182ef | 102 | will use. |
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103 | Glibc will try the path prefix |
104 | .I P_tmpdir | |
105 | defined | |
106 | in | |
107 | .IR <stdio.h> , | |
108 | and if that fails the directory | |
109 | .IR /tmp . | |
47297adb | 110 | .SH SEE ALSO |
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111 | .BR exit (3), |
112 | .BR mkstemp (3), | |
113 | .BR mktemp (3), | |
114 | .BR tempnam (3), | |
115 | .BR tmpnam (3) |