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'\" te .\" Copyright (c) 2001, 2023, Oracle and/or its affiliates. .TH _lwp_kill 2 "30 Jan 2023" "Oracle Solaris 11.4" "System Calls" .SH NAME _lwp_kill \- send a signal to a LWP .SH SYNOPSIS .LP .nf #include <sys/lwp.h> #include <signal.h> \fBint\fR \fB_lwp_kill\fR(\fBlwpid_t\fR \fItarget_lwp\fR, \fBint\fR \fIsig\fR); .fi .SH DESCRIPTION .sp .LP The \fB_lwp_kill()\fR function sends a signal to the LWP specified by \fItarget_lwp\fR. The signal that is to be sent is specified by \fIsig\fR and must be one from the list given in \fBsignal.h\fR(3HEAD). If \fIsig\fR is 0 (the null signal), error checking is performed but no signal is actually sent. This can be used to check the validity of \fItarget_lwp\fR. .sp .LP The \fItarget_lwp\fR must be an LWP within the same process as the calling LWP. .SH RETURN VALUES .sp .LP Upon successful completion, \fB0\fR is returned. A non-zero value indicates an error. .SH ERRORS .sp .LP If any of the following conditions occur, \fB_lwp_kill()\fR fails and returns the corresponding value: .sp .ne 2 .mk .na \fB\fBEINVAL\fR\fR .ad .RS 10n .rt The \fIsig\fR argument is not a valid signal number. .RE .sp .ne 2 .mk .na \fB\fBESRCH\fR\fR .ad .RS 10n .rt The \fItarget_lwp\fR argument cannot be found in the current process. .RE .SH USAGE .sp .LP Most software should use the standard interfaces listed in the \fBthreads\fR(7) manual page instead of these low-level system calls. .SH ATTRIBUTES .sp .LP See \fBattributes\fR(7) for descriptions of the following attributes: .sp .TS tab( ) box; cw(2.75i) |cw(2.75i) lw(2.75i) |lw(2.75i) . ATTRIBUTE TYPE ATTRIBUTE VALUE _ MT-Level Async-Signal-Safe .TE .sp .SH SEE ALSO .sp .LP \fBsigprocmask\fR(2), \fBkill\fR(2), \fBsigaction\fR(2), \fBsignal.h\fR(3HEAD), \fBattributes\fR(7), \fBthreads\fR(7) .SH HISTORY .sp .LP The \fB_lwp_kill()\fR function was added in Solaris 2.4.