Re: SIGCONT misbehaviour in Linux

Andrea Arcangeli (andrea@suse.de)
Wed, 8 Dec 1999 23:26:04 +0100 (CET)


On Wed, 8 Dec 1999, Richard B. Johnson wrote:

>co-pending system call to return to the caller with -EINTR. It
>is the 'C' runtime library that decides, based upon this flag,
>if the system call should be restarted or if -1 should be returned
>to the caller with errno set to EINTR.

glibc could also return to run the syscall without waiting again from the
beginning by looking at the 'struct timespec *rem'. If there wouldn't be
the `rem` parameter in nanosleep, glibc couldn't wrap the -EINTR
trasparently. But there is.

NOTE: I can as well fix the kernel for this, but I agree with Peter that
returning -INTR looks like the right thing to do. (I don't know which is
the official semantic for the syscall though)

Andrea

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