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* Use support_open_dev_null_range io/tst-closefrom, misc/tst-close_range, and ↵Adhemerval Zanella2021-08-261-21/+10
| | | | | | | | | posix/tst-spawn5 (BZ #28260) It ensures a continuous range of file descriptor and avoid hitting the RLIMIT_NOFILE. Checked on x86_64-linux-gnu.
* linux: Add close_rangeAdhemerval Zanella2021-07-081-0/+303
It was added on Linux 5.9 (278a5fbaed89) with CLOSE_RANGE_CLOEXEC added on 5.11 (582f1fb6b721f). Although FreeBSD has added the same syscall, this only adds the symbol on Linux ports. This syscall is required to provided a fail-safe way to implement the closefrom symbol (BZ #10353). Checked on x86_64-linux-gnu and i686-linux-gnu on kernel 5.11 and 4.15.