---
name: "siglongjmp"
section: "3p"
platform: "linux"
package: "man-pages"
version: "6.19-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/siglongjmp/3p"
---

# siglongjmp(3p)

non-local goto with signal handling

## PROLOG

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.

## NAME

siglongjmp — non-local goto with signal handling

## SYNOPSIS

```
#include <setjmp.h>
```

void siglongjmp(sigjmp\_buf *env*, int *val*);

## DESCRIPTION

The *siglongjmp*() function shall be equivalent to the *longjmp*() function, 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.

## RETURN VALUE

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.

## ERRORS

No errors are defined.

*The following sections are informative.*

## EXAMPLES

None.

## APPLICATION USAGE

The distinction between *setjmp*() or *longjmp*() and *sigsetjmp*() or *siglongjmp*() is only significant for programs which use *sigaction*(), *sigprocmask*(), or *sigsuspend*().

## RATIONALE

None.

## FUTURE DIRECTIONS

None.

## SEE ALSO

*longjmp()*, *pthread\_sigmask()*, *setjmp()*, *sigsetjmp()*, *sigsuspend()*

The Base Definitions volume of POSIX.1‐2017, ***\<setjmp.h\>***

## COPYRIGHT

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 https://www.kernel.org/doc/man-pages/reporting\_bugs.html .