The siglongjmp() function shall be equivalent to the longjmp()
except as follows:
References to setjmp() shall be equivalent to sigsetjmp().
The siglongjmp() function shall restore the saved signal mask
if and only if the env argument was initialized by a
call to sigsetjmp() with a non-zero savemask argument.
After siglongjmp() is completed, program execution shall continue
as if the corresponding invocation of sigsetjmp() had just returned
the value specified by val. The siglongjmp()
function shall not cause sigsetjmp() to return 0; if val
is 0, sigsetjmp() shall return the value 1.
No errors are defined.
The following sections are informative.
The distinction between setjmp() or longjmp() and sigsetjmp()
siglongjmp() is only significant for programs which use sigaction(),
sigprocmask(), or sigsuspend().
longjmp() , setjmp() , sigprocmask() , sigsetjmp()
, sigsuspend() , the Base Definitions volume of IEEE Std 1003.1-2001,
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 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