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- /*
- * sendfile() 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/sendfile.h>
- # include <bits/wordsize.h>
- #if defined __NR_sendfile
- _syscall4(ssize_t, sendfile, int, out_fd, int, in_fd, __off_t *, offset,
- size_t, count)
- # if !defined __NR_sendfile64 || __WORDSIZE == 64
- libc_hidden_def(sendfile64)
- strong_alias_untyped(sendfile,sendfile64)
- # endif
- #elif defined __NR_sendfile64 && !defined __NR_sendfile
- # include <unistd.h>
- # include <stddef.h>
- ssize_t sendfile(int out_fd, int in_fd, __off_t *offset, size_t count)
- {
- __off64_t off64, *off;
- ssize_t res;
- /*
- * Check if valid fds and valid pointers were passed
- * This does not prevent the user from passing
- * an arbitrary pointer causing a segfault or
- * other security issues
- */
- if (in_fd < 0 || out_fd < 0) {
- __set_errno(EBADF);
- return -1;
- }
- if ((int)offset < 0) {
- __set_errno(EFAULT);
- return -1;
- }
- if (offset) {
- off = &off64;
- off64 = *offset;
- } else {
- off = NULL;
- }
- res = INLINE_SYSCALL(sendfile64, 4, out_fd, in_fd, off, count);
- if (res >= 0 && offset != NULL)
- *offset = off64;
- return res;
- }
- #endif
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