tmpfile64—create a large temporary file ¶Synopsis
#include <stdio.h> FILE *tmpfile64(void); FILE *_tmpfile64_r(void *reent);
Description
Create a large 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 file may be larger than 2GB.
The alternate function _tmpfile64_r is a reentrant version. The
argument reent is a pointer to a reentrancy structure.
Both tmpfile64 and _tmpfile64_r are only defined if __LARGE64_FILES
is defined.
Returns
tmpfile64 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.
Portability
tmpfile64 is a glibc extension.
Supporting OS subroutines required: close, fstat, getpid,
isatty, lseek64, open64, read, sbrk, write.
tmpfile64 also requires the global pointer environ.