(libc.info.gz) Stream/Descriptor Precautions

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(libc.info.gz) Descriptors and Streams

(libc.info.gz) Low-Level I/O

(libc.info.gz) Scatter-Gather

 
 13.5 Dangers of Mixing Streams and Descriptors
 ==============================================
 
 You can have multiple file descriptors and streams (let's call both
 streams and descriptors "channels" for short) connected to the same
 file, but you must take care to avoid confusion between channels.  There
 are two cases to consider: "linked" channels that share a single file
 position value, and "independent" channels that have their own file
 positions.
 
    It's best to use just one channel in your program for actual data
 transfer to any given file, except when all the access is for input.
 For example, if you open a pipe (something you can only do at the file
 descriptor level), either do all I/O with the descriptor, or construct a
 stream from the descriptor with `fdopen' and then do all I/O with the
 stream.
 

Menu

 
* Linked Channels        Dealing with channels sharing a file position.
* Independent Channels   Dealing with separately opened, unlinked channels.
* Cleaning Streams       Cleaning a stream makes it safe to use
                             another channel.
 

Info Catalog

(libc.info.gz) Descriptors and Streams

(libc.info.gz) Low-Level I/O

(libc.info.gz) Scatter-Gather