SIGINTERRUPT Section: Linux Programmer's Manual (3) Updated: April 13, 2025 Index   NAME siginterrupt - allow signals to interrupt system calls   SYNOPSIS #include <signal.h> int siginterrupt(int sig, int flag);   DESCRIPTION The siginterrupt() function changes the restart behaviour when a system call is interrupted by the signal sig. If the flag argument is false (0), then system calls will be restarted if interrupted by the specified signal sig. This is the default behaviour in Linux. However, when a new signal handler is specified with the If the flags argument is true (1) and no data has been transferred, then a system call interrupted by the signal sig will return -1 and the global variable errno will be set to EINTR. If the flags argument is true (1) and data transfer has started, then the system call will be interrupted and will return the actual amount of data transferred.   RETURN VALUE The siginterrupt() function returns 0 on success, or -1 if the signal number sig is invalid.   ERRORS EINVAL The specified signal number is invalid.   CONFORMING TO BSD 4.3   SEE ALSO   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE ERRORS CONFORMING TO SEE ALSO This document was created by using the manual pages. Time: 11:58:06 GMT, March 24, 2025