Christos Margiolis
f61e65e1b2
This function never succeeds when it is not called from the same process that has opened the file descriptor (e.g., mixer(8)). The reason is that the CHN_FOREACH() loop tries to match the pid of each channel with the pid of the process performing the ioctl, which will not be the same, unless it's the same process that both opened the channel and performed the ioctl. In the case that the same process opens the channels and performs the ioctl, however, we still do not need to worry, because mixer_ioctl_cmd() essentially does the same thing anyway. Additionally, this scenario should be quite rare, given that most applications do not open both /dev/dsp* and /dev/mixer*, and in fact, it is actively encouraged by the official OSSv4 specification not to do that. Sponsored by: The FreeBSD Foundation MFC after: 1 week Pull Request: https://ron-dev.freebsd.org/FreeBSD/src/pulls/18
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