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sigreturn(2) System Calls Manual sigreturn(2) NAME sigreturn - Returns from signal SYNOPSIS #include <signal.h> int sigreturn( struct sigcontext *scp) ; PARAMETERS Points to a sigcontext structure whose members contain the processor state to be restored. The contents of the sigcontext structure should have been previously obtained by entry to a signal handler or by the setjmp() or sigsetjmp() function. DESCRIPTION The sigreturn() function restores the processor state of the calling process from a sigcontext structure. The sigcontext structure contains the state of all application-visible registers as well as the signal mask. The specific members of the sigcontext structure depend on the machine architecture. Each machine-dependent structure member is de- fined in the signal.h include file. The sigreturn() function is used internally by the system software to restore the processor state on return from a signal handler and from a longjmp() function, to restore the state saved by a previous setjmp() or sigsetjmp() function. NOTES An application should only use sigreturn() with great caution. RETURN VALUES Upon successful completion, the sigreturn() function does not return. Otherwise, a value of -1 is returned and errno may be set to indicate the error. ERRORS If the sigreturn() function fails, the process context remains un- changed and errno is set to one of the following values: The scp para- meter points to memory space that is not a valid part of the process address space. The sigcontext structure contains unsupported or ille- gal values. RELATED INFORMATION Functions: setjmp(3), sigaction(2), sigvec(2) delim off sigreturn(2)