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# fpassthru

fpassthru -- output all remaining data on a file pointer

## Description

`int fpassthru`(int fp);

Reads to EOF on the given file pointer and writes the results to standard output.

If an error occurs, fpassthru() returns false.

The file pointer must be valid, and must point to a file successfully opened by fopen(), popen(), or fsockopen(). The file is closed when fpassthru() is done reading it (leaving `fp` useless).

If you just want to dump the contents of a file to stdout you may want to use the readfile(), which saves you the fopen() call.

See also readfile(), fopen(), popen(), and fsockopen()

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