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Python Programming On Win32 by Mark Hammond, Andy Robinson

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File Descriptor Operations

These functions operate on I/O streams referred to with file descriptors:

close( fd )

Closes file descriptor fd. Availability: Macintosh, Unix, Windows.

This function is intended for low-level I/O and must be applied to a file descriptor as returned by open() or pipe(). To close a file object returned by the built-in function open(), by popen(), or fdopen(), use its close() method.

dup( fd )

Returns a duplicate of file descriptor fd. Availability: Macintosh, Unix, Windows.

dup2( fd , fd2 )

Duplicates file descriptor fd to fd2, closing the latter first if necessary. Availability: Unix, Windows.

fstat( fd )

Returns status for file descriptor fd , like stat(). Availability: Unix, Windows.

fstatvfs( fd )

Returns information about the filesystem containing the file associated with file descriptor fd , like statvfs(). Availability: Unix.

ftruncate( fd, length )

Truncates the file corresponding to file descriptor fd , so that it is length bytes in size. Availability: Unix.

lseek( fd , pos , how )

Sets the current position of file descriptor fd to position pos, modified by how : to set the position relative to the beginning of the file; 1 to set it relative to the current position; and 2 to set it relative to the end of the file. Availability: Macintosh, Unix, Windows.

open( file, flags[, mode] )

Opens the file file and sets various flags according to flags and, possibly, its mode according to mode. The default mode is 0777 (octal), and the current umask value ...

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