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Fixing the unfixable autofs ABIFixing the unfixable autofs ABIPosted May 3, 2012 19:30 UTC (Thu) by kleptog (subscriber, #1183)In reply to: Fixing the unfixable autofs ABI by butlerm Parent article: Fixing the unfixable autofs ABI
Interestingly, packetised pipes have existed for a while, see SOCK_SEQPACKET (possibly only supported for AF_UNIX). They're indeed useful in cases where you want to be sure that clients don't lose sync when the packets change size. Though a well designed protocol doesn't have the problem in the first place.
I suppose changing the type of pipe to userspace would be an even greater ABI change.
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Fixing the unfixable autofs ABI Posted May 10, 2012 5:53 UTC (Thu) by kevinm (guest, #69913) [Link]
Well, yes - changing the type of file descriptor used wouldn't fix the existing binaries, which is the whole problem (in the autofs protocol, the userspace program creates the pipe with pipe(2)).
I think it was mentioned somewhere in the thread that an SOCK_SEQPACKET socket would have been a better design, but hindsight is always an exact science.
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