projects / thirdparty / man-pages.git / blame
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1 | .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| 2 | .\" | |
| 5fbde956 | 3 | .\" SPDX-License-Identifier: Linux-man-pages-copyleft |
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4 | .\" |
| 5 | .\" References consulted: | |
| 6 | .\" Linux libc source code | |
| 7 | .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) | |
| 8 | .\" 386BSD man pages | |
| 9 | .\" Modified Sat Jul 24 17:46:57 1993 by Rik Faith (faith@cs.unc.edu) | |
| 10 | .\" Modified 2001-11-17, aeb | |
| 45186a5d | 11 | .TH TMPFILE 3 2021-03-22 "Linux man-pages (unreleased)" |
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12 | .SH NAME |
| 13 | tmpfile \- create a temporary file | |
| 6178e88b AC |
14 | .SH LIBRARY |
| 15 | Standard C library | |
| 8fc3b2cf | 16 | .RI ( libc ", " \-lc ) |
| fea681da MK |
17 | .SH SYNOPSIS |
| 18 | .nf | |
| 19 | .B #include <stdio.h> | |
| 68e4db0a | 20 | .PP |
| 18a2cc04 | 21 | .B FILE *tmpfile(void); |
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22 | .fi |
| 23 | .SH DESCRIPTION | |
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24 | The |
| 25 | .BR tmpfile () | |
| 26 | function opens a unique temporary file | |
| af8d55f9 | 27 | in binary read/write (w+b) mode. |
| fea681da | 28 | The file will be automatically deleted when it is closed or the |
| af8d55f9 | 29 | program terminates. |
| 47297adb | 30 | .SH RETURN VALUE |
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31 | The |
| 32 | .BR tmpfile () | |
| 33 | function returns a stream descriptor, or NULL if | |
| fea681da | 34 | a unique filename cannot be generated or the unique file cannot be |
| c13182ef | 35 | opened. |
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36 | In the latter case, |
| 37 | .I errno | |
| 38 | is set to indicate the error. | |
| fea681da | 39 | .SH ERRORS |
| c13182ef | 40 | .TP |
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41 | .B EACCES |
| 42 | Search permission denied for directory in file's path prefix. | |
| 43 | .TP | |
| 44 | .B EEXIST | |
| 45 | Unable to generate a unique filename. | |
| 46 | .TP | |
| 47 | .B EINTR | |
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48 | The call was interrupted by a signal; see |
| 49 | .BR signal (7). | |
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50 | .TP |
| 51 | .B EMFILE | |
| 26c32fab | 52 | The per-process limit on the number of open file descriptors has been reached. |
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53 | .TP |
| 54 | .B ENFILE | |
| e258766b | 55 | The system-wide limit on the total number of open files has been reached. |
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56 | .TP |
| 57 | .B ENOSPC | |
| 58 | There was no room in the directory to add the new filename. | |
| 59 | .TP | |
| 60 | .B EROFS | |
| 9ee4a2b6 | 61 | Read-only filesystem. |
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62 | .SH ATTRIBUTES |
| 63 | For an explanation of the terms used in this section, see | |
| 64 | .BR attributes (7). | |
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65 | .ad l |
| 66 | .nh | |
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67 | .TS |
| 68 | allbox; | |
| c466875e | 69 | lbx lb lb |
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70 | l l l. |
| 71 | Interface Attribute Value | |
| 72 | T{ | |
| 73 | .BR tmpfile () | |
| 74 | T} Thread safety MT-Safe | |
| 75 | .TE | |
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76 | .hy |
| 77 | .ad | |
| 78 | .sp 1 | |
| 3113c7f3 | 79 | .SH STANDARDS |
| 9ac35429 | 80 | POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD, SUSv2. |
| fea681da | 81 | .SH NOTES |
| 47e9b9f1 | 82 | POSIX.1-2001 specifies: |
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83 | an error message may be written to |
| 84 | .I stdout | |
| 85 | if the stream | |
| fea681da | 86 | cannot be opened. |
| dd3568a1 | 87 | .PP |
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88 | The standard does not specify the directory that |
| 89 | .BR tmpfile () | |
| c13182ef | 90 | will use. |
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91 | Glibc will try the path prefix |
| 92 | .I P_tmpdir | |
| 93 | defined | |
| 94 | in | |
| 95 | .IR <stdio.h> , | |
| f2a4cb65 | 96 | and if that fails, then the directory |
| c6fa0841 | 97 | .IR /tmp . |
| 47297adb | 98 | .SH SEE ALSO |
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99 | .BR exit (3), |
| 100 | .BR mkstemp (3), | |
| 101 | .BR mktemp (3), | |
| 102 | .BR tempnam (3), | |
| 103 | .BR tmpnam (3) |