LONGJMP(3) Library functions LONGJMP(3)NAME
longjmp, siglongjmp - non-local jump to a saved stack context
SYNOPSIS
#include <setjmp.h>
void longjmp(jmp_buf env, int val);
void siglongjmp(sigjmp_buf env, int val);
DESCRIPTION
longjmp() and setjmp() are useful for dealing with errors and interrupts encountered in a low-level subroutine of a program. longjmp()
restores the environment saved by the last call of setjmp() with the corresponding env argument. After longjmp() is completed, program
execution continues as if the corresponding call of setjmp() had just returned the value val. longjmp() cannot cause 0 to be returned. If
longjmp is invoked with a second argument of 0, 1 will be returned instead.
siglongjmp() is similar to longjmp() except for the type of its env argument. If the sigsetjmp() call that set this env used a nonzero
savesigs flag, siglongjmp() also restores the set of blocked signals.
RETURN VALUE
These functions never return.
CONFORMING TO
POSIX
NOTES
POSIX does not specify whether longjmp will restore the signal context. If you want to save and restore signal masks, use siglongjmp.
longjmp() and siglongjmp() make programs hard to understand and maintain. If possible an alternative should be used.
SEE ALSO setjmp(3), sigsetjmp(3)
1997-03-02 LONGJMP(3)
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LONGJMP(3) Library functions LONGJMP(3)NAME
longjmp, siglongjmp - non-local jump to a saved stack context
SYNOPSIS
#include <setjmp.h>
void longjmp(jmp_buf env, int val);
void siglongjmp(sigjmp_buf env, int val);
DESCRIPTION
longjmp() and setjmp() are useful for dealing with errors and interrupts encountered in a low-level subroutine of a program. longjmp()
restores the environment saved by the last call of setjmp() with the corresponding env argument. After longjmp() is completed, program
execution continues as if the corresponding call of setjmp() had just returned the value val. longjmp() cannot cause 0 to be returned. If
longjmp is invoked with a second argument of 0, 1 will be returned instead.
siglongjmp() is similar to longjmp() except for the type of its env argument. If the sigsetjmp() call that set this env used a nonzero
savesigs flag, siglongjmp() also restores the set of blocked signals.
RETURN VALUE
These functions never return.
CONFORMING TO
POSIX
NOTES
POSIX does not specify whether longjmp will restore the signal context. If you want to save and restore signal masks, use siglongjmp.
longjmp() and siglongjmp() make programs hard to understand and maintain. If possible an alternative should be used.
SEE ALSO setjmp(3), sigsetjmp(3)
1997-03-02 LONGJMP(3)
Hi everyone,
Is there a variable or built in function in the Unix env. for me to obtain the name of a signal that is caught? As far as I understand only a numeric value of the signal is returned to the handler.
For example:
void handler (int signum)
{
... (2 Replies)
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I am using setjmp and longjmp in a deeply nested functions BUT longjmp is not returning(hanging in longjmp)
How can I debug this issue. I could not cut and paste the code due to its size and it is chained with other programs.
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Hi All,
in my HP-UX 11.11 , there is an parameter of SFTP_UMASK at env,
but How do we use it ?
I tried with type : SFTP_UMASK=022
and when I type : env
the SFTP_UMASK value has changed to 022 .
but when I send a file with use SFTP from other pc/server .
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