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#include <sys/select.h> #include <signal.h> #include <stdint.h> #include <errno.h> #include "syscall.h" int select(int n, fd_set *restrict rfds, fd_set *restrict wfds, fd_set *restrict efds, struct timeval *restrict tv) { #ifdef SYS_select return syscall_cp(SYS_select, n, rfds, wfds, efds, tv); #else syscall_arg_t data[2] = { 0, _NSIG/8 }; struct timespec ts; if (tv) { if (tv->tv_sec < 0 || tv->tv_usec < 0) return __syscall_ret(-EINVAL); time_t extra_secs = tv->tv_usec / 1000000; ts.tv_nsec = tv->tv_usec % 1000000 * 1000; const time_t max_time = (1ULL<<8*sizeof(time_t)-1)-1; ts.tv_sec = extra_secs > max_time - tv->tv_sec ? max_time : tv->tv_sec + extra_secs; } return syscall_cp(SYS_pselect6, n, rfds, wfds, efds, tv ? &ts : 0, data); #endif } |