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pgrep: Better warning if pidfd_open not implemented

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If procps is built on a Linux 5.3+ system then pidwait
is built with pidfd_open(). If that program is run on
a system < 5.3 then it gives an odd generic error.

If we get a ENOSYS from one pid, we will get it for all
the others so its better to explain what happens and terminate.

The man page is updated to note this issue.

This came up due to killall in psmisc using pidfd_send_signal

References:
 https://bugs.debian.org/1015228

Signed-off-by: Craig Small <csmall@dropbear.xyz>
This commit is contained in:
Craig Small
2022-07-18 20:51:41 +10:00
parent bcce3e440a
commit 95a253aa6e
3 changed files with 9 additions and 2 deletions
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@@ -2,6 +2,7 @@ procps-ng-NEXT
* library
Re-add elogind support merge #151
Used memory is Total - Available
* pidwait: Better warning if pidfd_open not implemented
* pmap: Dont reuse stdin filehandle issue #231
* ps: threads again display when -L is used with -q issue #234
* ps: proper aix format string behavior was restored