/* * select() for uClibc * * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include <sys/syscall.h> #include <sys/select.h> #include <cancel.h> #ifdef __NR__newselect # undef __NR_select # define __NR_select __NR__newselect #endif #if !defined __NR_select && defined __NR_pselect6 # include <stdint.h> # define USEC_PER_SEC 1000000L #endif int __NC(select)(int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout) { #ifdef __NR_select return INLINE_SYSCALL(select, 5, n, readfds, writefds, exceptfds, timeout); #elif defined __NR_pselect6 struct timespec _ts, *ts = 0; if (timeout) { uint32_t usec; _ts.tv_sec = timeout->tv_sec; /* GNU extension: allow for timespec values where the sub-sec * field is equal to or more than 1 second. The kernel will * reject this on us, so take care of the time shift ourself. * Some applications (like readline and linphone) do this. * See 'clarification on select() type calls and invalid timeouts' * on the POSIX general list for more information. */ usec = timeout->tv_usec; if (usec >= USEC_PER_SEC) { _ts.tv_sec += usec / USEC_PER_SEC; usec %= USEC_PER_SEC; } _ts.tv_nsec = usec * 1000; ts = &_ts; } return INLINE_SYSCALL(pselect6, 6, n, readfds, writefds, exceptfds, ts, 0); #endif } /* we should guard it, but we need it in other files, so let it fail * if we miss any of the syscalls */ #if 1 /*defined __NR_select || defined __NR_pselect6*/ CANCELLABLE_SYSCALL(int, select, (int n, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, struct timeval *timeout), (n, readfds, writefds, exceptfds, timeout)) lt_libc_hidden(select) #endif