Messages in this thread | | | Date | Sun, 24 Jul 2005 10:56:08 -0400 | From | Theodore Ts'o <> | Subject | Re: Lack of Documentation about SA_RESTART... |
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On Sat, Jul 23, 2005 at 05:30:42PM -0700, Linus Torvalds wrote: > On Mon, 11 Jul 2005, Theodore Ts'o wrote: > > > > According to the Single Unix Specification V3, all functions that > > return EINTR are supposed to restart if a process receives a signal > > where signal handler has been installed with the SA_RESTART flag. > > That can't be right. > > Some operations, like "select()" and "pause()" always return EINTR, and > indeed, real applications will break if you always restart. Restarting a > pause() would be nonsensical.
The spect says "unless otherwise specified". The description for pause() states that the process will sleep until receiving a signal that terminates the process or causes it to call signal-handling function. That would presumably count as an "otherwise specified".
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