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tkill.2: Use syscall(SYS_...); for system calls without a wrapper; fix includes too 

Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Alejandro Colomar 2021-06-12 10:31:35 +02:00 committed by Michael Kerrisk
parent 9a52fd2eec
commit d96a43d419
1 changed files with 13 additions and 9 deletions
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22
man2/tkill.2
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@ -31,14 +31,22 @@
tkill, tgkill \- send a signal to a thread tkill, tgkill \- send a signal to a thread
.SH SYNOPSIS .SH SYNOPSIS
.nf .nf
.BI "int tkill(pid_t " tid ", int " sig ); .BR "#include <signal.h>" " /* Definition of " SIG* " constants */"
.BI "int tgkill(pid_t " tgid ", pid_t " tid ", int " sig ); .BR "#include <sys/syscall.h>" " /* Definition of " SYS_* " constants */"
.B #include <unistd.h>
.PP
.BI "int syscall(SYS_tkill, pid_t " tid ", int " sig );
.PP
.B #include <signal.h>
.PP
.BI "int tgkill, pid_t " tgid ", pid_t " tid ", int " sig );
.fi .fi
.PP .PP
.IR Note : .IR Note :
There is no glibc wrapper for glibc provides no wrapper for
.BR tkill (); .BR tkill (),
see NOTES. necessitating the use of
.BR syscall (2).
.SH DESCRIPTION .SH DESCRIPTION
.BR tgkill () .BR tgkill ()
sends the signal sends the signal
@ -138,10 +146,6 @@ in
.BR clone (2) .BR clone (2)
for an explanation of thread groups. for an explanation of thread groups.
.PP .PP
Glibc does not provide a wrapper for
.BR tkill ();
call it using
.BR syscall (2).
Before glibc 2.30, there was also no wrapper function for Before glibc 2.30, there was also no wrapper function for
.BR tgkill (). .BR tgkill ().
.SH SEE ALSO .SH SEE ALSO