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  36         id 1Rec6s-00049M-OY; Sat, 24 Dec 2011 19:38:42 -0500\r
  37 Date: Sat, 24 Dec 2011 19:38:42 -0500\r
  38 From: Austin Clements <amdragon@MIT.EDU>\r
  39 To: David Edmondson <dme@dme.org>\r
  40 Subject: Re: [PATCH] Properly handle short writes in sigint handlers\r
  41 Message-ID: <20111225003842.GA15906@mit.edu>\r
  42 References: <20111222201553.GK10376@mit.edu>\r
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  78 \r
  79 Quoth David Edmondson on Dec 23 at  8:10 am:\r
  80 > Sorry for being slow.\r
  81 > \r
  82 > Can you describe the situation in which you expect a write to stderr to\r
  83 > be a short write? (Without error.)\r
  84 \r
  85 If the PTY buffer is nearly full because, say, my terminal emulator is\r
  86 a little behind or my SSH session is slow, I believe POSIX allows this\r
  87 to be a short write (though Linux appears to treat PTYs like pipes and\r
  88 will block rather than doing a short write, so it's completely\r
  89 possible I'm misinterpreting POSIX).\r
  90 \r
  91 > In that situation, what guarantee is there that the loop you've written\r
  92 > will terminate?\r
  93 \r
  94 There isn't, but for the same reason there's also no guarantee that a\r
  95 single write will terminate.\r
  96 \r
  97 > We're not talking about safeguarding a users' data here - this is a\r
  98 > short message to indicate that a tool is terminating due to a signal.\r
  99 > I'm concerned that the solution is worse than the problem.\r
 100 \r
 101 As a user I'd be confused to see just part of the "Stopping" message\r
 102 jammed in the middle of other output, but you're definitely right that\r
 103 the consequences of this would not extend beyond a little bit of\r
 104 harmless confusion.\r