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Open Sound System
OSS 4.x Programmer's Guide

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SNDCTL_DSP_POST

Forces audio playback to start (obsolete)

Usage

The above code fragment lacks all error checks for clarity. Real world applications must always check for the errors and handle them as described below. Also most OSS ioctl calls will return information in the argument variable and it's usually necessary to check it too.

Description

This ioctl call is provided for compatibility with older applications. It has no practical purpose and should in no case be used in new applications.

Compatibility issues

This call is supported by all OSS vesions.

Please look at the When OSS audio ioctl calls can be made section for information about DSP ioctl call ordering.

OSS ioctl return values

The return value from the OSS ioctl calls will be -1 if a fatal error occurred. Other values mean that the ioctl call was more or less successful. However in most cases the application must check the value returned in the argument to see what was the accepted value.

Please see the Possible error codes (errno) returned by OSS calls section for more info about the error codes returned by OSS.

Sample programs

No sample programs available

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