siginterrupt(3C)

Name | Synopsis | Description | Return Values | Errors | Usage | Attributes | See Also

Name

siginterrupt– allow signals to interrupt functions

Synopsis

#include <signal.h>

int siginterrupt(int sig, int flag);

Description

The siginterrupt() function changes the restart behavior when a function is interrupted by the specified signal. The function siginterrupt(sig, flag) has an effect as if implemented as:

siginterrupt(int sig, int flag) {
     int ret;
     struct sigaction act;
     (void) sigaction(sig, NULL, &act);
     if (flag)
          act.sa_flags &=  SA_RESTART;
     else
          act.sa_flags |= SA_RESTART;
     ret = sigaction(sig, &act, NULL);
     return ret;
}

Return Values

Upon successful completion, siginterrupt() returns 0. Otherwise, -1 is returned and errno is set to indicate the error.

Errors

The siginterrupt() function will fail if:

EINVAL

The sig argument is not a valid signal number.

Usage

The siginterrupt() function supports programs written to historical system interfaces. A standard-conforming application, when being written or rewritten, should use sigaction(2) with the SA_RESTART flag instead of siginterrupt().

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Standard
MT-Level	MT-Safe

See Also

sigaction(2), signal.h(3HEAD), attributes(5), standards(5)

SunOS 5.11  Last Revised 1 Sep 2003

Name | Synopsis | Description | Return Values | Errors | Usage | Attributes | See Also