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SIGRETURN(2) FreeBSD System Calls Manual SIGRETURN(2) NAME sigreturn -- return from signal SYNOPSIS int sigreturn(struct sigcontext *scp); DESCRIPTION The sigreturn() syscall is used by the signal handling facility to atomi- cally switch stacks, restore registers and the thread's signal mask, and return from a signal context to resume the processing that was inter- rupted by the signal. Note that sigcontext contains machine dependent information. Direct use of sigreturn is no longer supported and it is not provided as a function. As used in the signal trampoline provided by the system, if sigreturn fails and returns then the process is terminated. RETURN VALUES If successful, the system call does not return. Otherwise, a value of -1 is returned and errno is set to indicate the error. ERRORS sigreturn() will fail and the process context will remain unchanged if one of the following occurs. [EFAULT] scp points to memory that is not a valid part of the process address space. [EINVAL] The sigcontext provided is invalid or would improperly raise the privilege level of the process. SEE ALSO sigaction(2), setjmp(3) HISTORY The sigreturn() function appeared in 4.3BSD. The function was removed from libc in OpenBSD 6.0. FreeBSD 13.0 May 9, 2016 FreeBSD 13.0
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | HISTORY
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