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    SubjectRe: nanosleep interrupted by ignored signals
    Matt Mackall wrote:
    > Take the following trivial program:
    >
    > #include <unistd.h>
    >
    > int main(void)
    > {
    > sleep(10);
    > return 0;
    > }
    >
    > Run it in an xterm. Note that resizing the xterm has no effect on the
    > process. Now do the same with strace:
    >
    > brk(0x80495bc) = 0x80495bc
    > brk(0x804a000) = 0x804a000
    > rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
    > rt_sigaction(SIGCHLD, NULL, {SIG_DFL}, 8) = 0
    > rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
    > nanosleep({10, 0}, 0xbffff548) = -1 EINTR (Interrupted system
    > call)
    > --- SIGWINCH (Window changed) ---
    > _exit(0) = ?
    >
    > In short, nanosleep is getting interrupted by signals that are
    > supposedly ignored when a process is being praced. This appears to be
    > a long-standing bug.
    >
    > It also appears to be a long-known bug. I found some old discussion of this
    > problem here but no sign of any resolution:
    >
    > http://www.ussg.iu.edu/hypermail/linux/kernel/0108.1/1448.html
    >
    > What's the current thinking on this?

    This should have been resolved with the 2.6 changes, in particular, the restart
    code. What kernel are you using?
    >

    --
    George Anzinger george@mvista.com
    High-res-timers: http://sourceforge.net/projects/high-res-timers/

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