[asterisk-bugs] [JIRA] Created: (ASTERISK-20283) Files descriptors for dummy channels need to be set to -1

[Gareth Palmer (JIRA)]

Files descriptors for dummy channels need to be set to -1
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                 Key: ASTERISK-20283
                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-20283
             Project: Asterisk
          Issue Type: Bug
      Security Level: None
          Components: Channels/General
    Affects Versions: 11.0.0-beta1, SVN
            Reporter: Gareth Palmer
            Severity: Minor
         Attachments: svn-371580.patch

ast_dummy_channel_alloc doesn't set the file descriptors for the newly created channel to -1, instead they are left as 0 which is a valid file descriptor.

Dummy channels usually aren't read from, but functions like SHELL and CURL use autoservice on the channel. Without the patch the following is printed to the console:

ERROR[10552]: channel_internal_api.c:1095 ast_channel_internal_alert_read: Alertpipe on channel  lost O_NONBLOCK?!!
WARNING[10552]: channel.c:3980 __ast_read: No read routine on channel
WARNING[10549]: channel.c:1330 __ast_queue_frame: Unable to write to alert pipe on  (qlen = 0): Bad file descriptor!

Patch initializes the file descriptors using the same code for normal channel allocations. Bug us minor because the function's output is returned correctly.

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