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linux: Add pidfd_send_signal
This was added on Linux 5.1(3eb39f47934f9d5a3027fe00d906a45fe3a15fad) as a way to avoid the race condition of using kill (where PID might be reused by the kernel between between obtaining the pid and sending the signal). If the siginfo_t argument is NULL then pidfd_send_signal is equivalent to kill. If it is not NULL pidfd_send_signal is equivalent to rt_sigqueueinfo. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
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@ -499,6 +499,7 @@ GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_getfd F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.36 pidfd_send_signal F
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GLIBC_2.4 _Exit F
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GLIBC_2.4 _IO_2_1_stderr_ D 0x98
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GLIBC_2.4 _IO_2_1_stdin_ D 0x98
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@ -2730,6 +2730,7 @@ GLIBC_2.35 epoll_pwait2 F
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GLIBC_2.35 posix_spawn_file_actions_addtcsetpgrp_np F
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GLIBC_2.36 pidfd_getfd F
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GLIBC_2.36 pidfd_open F
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GLIBC_2.36 pidfd_send_signal F
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GLIBC_2.4 __confstr_chk F
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GLIBC_2.4 __fgets_chk F
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GLIBC_2.4 __fgets_unlocked_chk F
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