| .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| .\" |
| .\" %%%LICENSE_START(VERBATIM) |
| .\" Permission is granted to make and distribute verbatim copies of this |
| .\" manual provided the copyright notice and this permission notice are |
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| .\" Permission is granted to copy and distribute modified versions of this |
| .\" manual under the conditions for verbatim copying, provided that the |
| .\" entire resulting derived work is distributed under the terms of a |
| .\" permission notice identical to this one. |
| .\" |
| .\" Since the Linux kernel and libraries are constantly changing, this |
| .\" manual page may be incorrect or out-of-date. The author(s) assume no |
| .\" responsibility for errors or omissions, or for damages resulting from |
| .\" the use of the information contained herein. The author(s) may not |
| .\" have taken the same level of care in the production of this manual, |
| .\" which is licensed free of charge, as they might when working |
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| .\" Formatted or processed versions of this manual, if unaccompanied by |
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| .\" %%%LICENSE_END |
| .\" |
| .\" References consulted: |
| .\" Linux libc source code |
| .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) |
| .\" 386BSD man pages |
| .\" Modified Sat Jul 24 17:46:57 1993 by Rik Faith (faith@cs.unc.edu) |
| .\" Modified 2001-11-17, aeb |
| .TH TMPFILE 3 2016-03-15 "" "Linux Programmer's Manual" |
| .SH NAME |
| tmpfile \- create a temporary file |
| .SH SYNOPSIS |
| .nf |
| .B #include <stdio.h> |
| .PP |
| .B FILE *tmpfile(void); |
| .fi |
| .SH DESCRIPTION |
| The |
| .BR tmpfile () |
| function opens a unique temporary file |
| in binary read/write (w+b) mode. |
| The file will be automatically deleted when it is closed or the |
| program terminates. |
| .SH RETURN VALUE |
| The |
| .BR tmpfile () |
| function returns a stream descriptor, or NULL if |
| a unique filename cannot be generated or the unique file cannot be |
| opened. |
| In the latter case, |
| .I errno |
| is set to indicate the error. |
| .SH ERRORS |
| .TP |
| .B EACCES |
| Search permission denied for directory in file's path prefix. |
| .TP |
| .B EEXIST |
| Unable to generate a unique filename. |
| .TP |
| .B EINTR |
| The call was interrupted by a signal; see |
| .BR signal (7). |
| .TP |
| .B EMFILE |
| The per-process limit on the number of open file descriptors has been reached. |
| .TP |
| .B ENFILE |
| The system-wide limit on the total number of open files has been reached. |
| .TP |
| .B ENOSPC |
| There was no room in the directory to add the new filename. |
| .TP |
| .B EROFS |
| Read-only filesystem. |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .TS |
| allbox; |
| lb lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR tmpfile () |
| T} Thread safety MT-Safe |
| .TE |
| .SH CONFORMING TO |
| POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD, SUSv2. |
| .SH NOTES |
| POSIX.1-2001 specifies: |
| an error message may be written to |
| .I stdout |
| if the stream |
| cannot be opened. |
| .PP |
| The standard does not specify the directory that |
| .BR tmpfile () |
| will use. |
| Glibc will try the path prefix |
| .I P_tmpdir |
| defined |
| in |
| .IR <stdio.h> , |
| and if that fails the directory |
| .IR /tmp . |
| .SH SEE ALSO |
| .BR exit (3), |
| .BR mkstemp (3), |
| .BR mktemp (3), |
| .BR tempnam (3), |
| .BR tmpnam (3) |
