siginterrupt - allow signals to interrupt functions
#include <signal.h> int siginterrupt(int sig, int flag);
The siginterrupt() function is used to change the restart behaviour 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; }
Upon successful completion, siginterrupt() returns 0. Otherwise -1 is returned and errno is set to indicate the error.
The siginterrupt() function will fail if:
- [EINVAL]
- The sig argument is not a valid signal number.
None.
The siginterrupt() function supports programs written to historical system interfaces. A portable application, when being written or rewritten, should use sigaction() with the SA_RESTART flag instead of siginterrupt().
None.
sigaction(), <signal.h>.