wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 17818
pipe([3, 4]) = 0
clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD,
child_tidptr=0x7fe3556d7a10) = 17819
close(4) = 0
read(3,
This is the standard usage of pipe. pipe opens two connected file
descriptors, and returns these fds in the array that's the argument to
pipe. The process then forks, the parent closes one, the child closes
the other, and they talk across this pipe.
Since you are only stracing the grub-mkconfig process, and not following
forks ('strace -ff'), this trace doesn't show us what's actually
hanging.
grub-mkconfig, btw, is a shell script, so it's probably better to debug
it using 'sh -x /usr/sbin/grub-mkconfig' instead.
** Package changed: grub (Ubuntu) => grub2 (Ubuntu)
** Changed in: grub2 (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1527645
Title:
grub-mkconfig hangs (due to acting on closed handle?)
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