1*c9945492SAndroid Build Coastguard Worker #include <unistd.h> 2*c9945492SAndroid Build Coastguard Worker #include <errno.h> 3*c9945492SAndroid Build Coastguard Worker #include <sys/ioctl.h> 4*c9945492SAndroid Build Coastguard Worker #include "syscall.h" 5*c9945492SAndroid Build Coastguard Worker isatty(int fd)6*c9945492SAndroid Build Coastguard Workerint isatty(int fd) 7*c9945492SAndroid Build Coastguard Worker { 8*c9945492SAndroid Build Coastguard Worker struct winsize wsz; 9*c9945492SAndroid Build Coastguard Worker unsigned long r = syscall(SYS_ioctl, fd, TIOCGWINSZ, &wsz); 10*c9945492SAndroid Build Coastguard Worker if (r == 0) return 1; 11*c9945492SAndroid Build Coastguard Worker if (errno != EBADF) errno = ENOTTY; 12*c9945492SAndroid Build Coastguard Worker return 0; 13*c9945492SAndroid Build Coastguard Worker } 14