#include <stdio.h> FILE *fdopen(int fd, const char *mode);
This function opens a stream-type file that uses the given fd
file, which must already be open. The file is opened with the modes
specified by mode, which is the same as for fopen
.
See section fopen.
The newly created FILE *
, or NULL
on error.
not ANSI, POSIX
FILE *stdprn = fdopen(4, "w");
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