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.
siglongjmp — non-local goto with signal handling
void siglongjmp(sigjmp_buf env, int val);
The siglongjmp() function shall be equivalent to the longjmp()
function, except as follows:
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.
- References to setjmp() shall be equivalent to
- 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.
The following sections are informative.
The distinction between setjmp() or longjmp() and
sigsetjmp() or siglongjmp() is only significant for programs
which use sigaction(), sigprocmask(), or sigsuspend().
setjmp(), sigsetjmp(), sigsuspend()
The Base Definitions volume of POSIX.1‐2017,
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