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tmpfile
[create a temporary file]

SYNOPSIS
#include <stdio.h>
FILE *tmpfile(void);
FILE *_tmpfile_r(void * reent);

DESCRIPTION
tmpfile creates a temporary file (a file which will be deleted automatically), using a name generated by tmpnam. The temporary file is opened with the mode, wb+, permitting you to read and write anywhere in it as a binary file (without any data transformations the host system may perform for text files). The alternate function, _tmpfile_r, is a reentrant version.

The argument, reent, is a pointer to a reentrancy structure.

RETURNS
tmpfile normally returns a pointer to the temporary file. If no temporary file could be created, the result is NULL, and errno records the reason for failure.

COMPLIANCE
Both ANSI C and the System V Interface Definition (Issue 2) require tmpfile.

Supporting OS subroutines required: close, fstat, getpid, isatty, lseek, open, read, sbrk, write.

tmpfile also requires the global pointer, environ.