This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
#include <signal.h> int raise(int sig);
The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2017 defers to the ISO C standard.
The raise() function shall send the signal sig to the executing thread or process. If a signal handler is called, the raise() function shall not return until after the signal handler does.
The effect of the raise() function shall be equivalent to calling:
Upon successful completion, 0 shall be returned. Otherwise, a non-zero value shall be returned and errno shall be set to indicate the error.
The raise() function shall fail if:
The value of the sig argument is an invalid signal number.
The following sections are informative.
The term “thread” is an extension to the ISO C standard.
The Base Definitions volume of POSIX.1-2017, <signal.h>, <sys_types.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .
Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .
abort(3p), kill(3p), killpg(3p), pthread_kill(3p), sigaction(3p), signal(3p), signal.h(0p).