xref: /titanic_51/usr/src/man/man3c/siginterrupt.3c (revision 21b926adb26b0bf23fe75045ed308af582303bd0)
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SIGINTERRUPT 3C "Sep 1, 2003"
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)