fdopen : turn open file into a stream

Synopsis

#include <stdio.h>
FILE *fdopen(int fd, const char *mode);
FILE *_fdopen_r(void *reent, int fd, const char *mode);
```### Description

fdopen produces a file descriptor of type FILE *, from a descriptor for an already-open file (returned, for example, by the system subroutine open rather than by fopen). The mode argument has the same meanings as in fopen.### Returns

File pointer or NULL, as for fopen.

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**Authoritative source**: BUSMASTER DITA help source `fdopen.dita`, compiled into `BUSMASTER.CHM` with the application.