Permanently assigns a handler for a specific signal.
Format
#include <signal.h>
int sigvec (int sigint, struct sigvec *sv, struct
sigvec *osv);
Arguments
- sigint
- The signal identifier.
- sv
- Pointer to a sigvec structure (see the Description section).
- osv
- If osv is not NULL, the previous handling information
for the signal is returned.
Description
If sv is not NULL, it specifies the address of a
structure containing a pointer to a handler routine and mask to be
used when delivering the specified signal, and a flag indicating
whether the signal is to be processed on an alternative stack. If
sv->onstack has a value of 1, the system delivers
the signal to the process on a signal stack specified with sigstack.
The sigvec function establishes a handler that remains established
until explicitly removed or until the image terminates.
The sigvec structure is defined in the <signal.h> header file as
follows:
struct sigvec
{
int (*handler)();
int mask;
int onstack;
};
See Section 4.2 for more
information on signal handling.
Return Values
| 0 | Indicates that the call
succeeded. |
| -1 | Indicates
that an error occurred. |
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