sighold() — Add a signal to a thread

Standards

Standards / Extensions	C or C++	Dependencies
XPG4.2 Single UNIX Specification, Version 3	both

#define _XOPEN_SOURCE_EXTENDED 1
#include <signal.h>

int sighold(int sig);

The sighold() function provides a simplified method for adding the signal specified by the argument sig to the calling thread's signal mask.

The use of the SIGTHSTOP and SIGTHCONT signal is not supported with this function.

If successful, sighold() returns 0.

If unsuccessful, sighold() returns -1 and sets errno to one of the following values:

Error Code: Description
EINVAL: The value of the argument sig is not a valid signal type or it is SIGKILL, SIGSTOP, or SIGTRACE.