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Re: Does sendmsg only work on AF_UNIX sockets?
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Re: Does sendmsg only work on AF_UNIX sockets?


  • Subject: Re: Does sendmsg only work on AF_UNIX sockets?
  • From: Josh Graessley <email@hidden>
  • Date: Thu, 13 Nov 2008 13:05:13 -0800


On Nov 13, 2008, at 1:05 AM, Dave Camp wrote:

On Nov 12, 2008, at 4:12 PM, james woodyatt wrote:

On Nov 12, 2008, at 15:48, Dave Camp wrote:

Just to confirm, that was the source of my question... I've got two unrelated processes (not a parent/child relationship), neither can write to a common part of the file system and I want to pass a file descriptor from one to the other. My research was showing there wasn't a way to do it, but I thought I'd ask anyway.

How is it possible that one or both of your processes do not have rwx permissions on the /tmp directory? Did you do something with chroot(8) that you're not telling us? If so, then Don't Do That. Make sure the processes a have a common path to an AF_UNIX socket where you can pass file descriptors between them.

It's on a iPhone, that's how.

I didn't mention it because it wasn't relevant to the general question of "is AF_UNIX the only way to pass a file descriptor"... I apologize if that made your brain hurt.:-)

This answer inevitably leads to more questions.

What precisely are you trying to accomplish. For the most part, only a single iPhone app may run at a time. Are you trying to pass file descriptors between two different iPhone apps? Are you trying to run another process from your iPhone app? More information may help us determine if there's a way for you to solve your problem that will work on the iPhone.

Thanks,
-josh

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  • Follow-Ups:
    • Re: Does sendmsg only work on AF_UNIX sockets?
      • From: Dave Camp <email@hidden>
References: 
 >Does sendmsg only work on AF_UNIX sockets? (From: Dave Camp <email@hidden>)
 >Re: Does sendmsg only work on AF_UNIX sockets? (From: "Justin C. Walker" <email@hidden>)
 >Re: Does sendmsg only work on AF_UNIX sockets? (From: Quinn <email@hidden>)
 >Re: Does sendmsg only work on AF_UNIX sockets? (From: Dave Camp <email@hidden>)
 >Re: Does sendmsg only work on AF_UNIX sockets? (From: james woodyatt <email@hidden>)
 >Re: Does sendmsg only work on AF_UNIX sockets? (From: Dave Camp <email@hidden>)

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