Bug 239966 - timer_create(2): undefined and incorrect symbols mentioned as possible value for the evp->sigev_notify field
Summary: timer_create(2): undefined and incorrect symbols mentioned as possible value ...
Status: New
Alias: None
Product: Documentation
Classification: Unclassified
Component: Manual Pages (show other bugs)
Version: Latest
Hardware: Any Any
: --- Affects Only Me
Assignee: freebsd-bugs (Nobody)
Depends on:
Reported: 2019-08-19 13:15 UTC by Bertrand Petit
Modified: 2019-08-19 13:15 UTC (History)
2 users (show)

See Also:


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Description Bertrand Petit 2019-08-19 13:15:38 UTC
In FreeBSD 11.2, the timer_create(2) manpage mentions the SIGEV_SIGNO symbol as a possible value for the evp->sigev_notify field. This symbol is not defined in any of the base headers. I suppose it should had been written as SIGEV_SIGNAL instead.

Likewise, in the same manpage, SIGEV_THREAD_ID is mentioned for the same struct member, however this (defined) symbol refers to kernel threads. I guess that SIGEV_THREAD should had been used instead.

For reference, please see /usr/include/sys/signal.h and https://pubs.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_04.html#tag_02_04_02

It looks like the error arose from a confusion between the acceptable value of the evp->sigev_signo field and the names of the fields these values refer to, evp->sigev_signo for the SIGEV_SIGNAL value, and evp->sigev_notify_thread_id for the SIGEV_THREAD value. Since I'm trying for the first time to use that syscall I may be wrong.