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.
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