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read function

Fixed-length buffered input from a filehandle

    read FILEHANDLE,SCALAR,LENGTH,OFFSET
    read FILEHANDLE,SCALAR,LENGTH

Attempts to read LENGTH bytes of data into variable SCALAR from the specified FILEHANDLE. Returns the number of bytes actually read, 0 at end of file, or undef if there was an error. SCALAR will be grown or shrunk to the length actually read. An OFFSET may be specified to place the read data at some other place than the beginning of the string. This call is actually implemented in terms of stdio's fread(3) call. To get a true read(2) system call, see sysread().

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