libc/src/read.c


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#include "reent.h"
#include "errno.h"
#include <fio.h>

ssize_t read(int fd, void * buf, size_t size) {
    ssize_t r;
    
    if (!fio_is_open(fd)) {
        _impure_ptr->_errno = EBADF;
        return -1;
    }
    
    r = fio_read(fd, buf, size);
    
    if (r < 0) {
        _impure_ptr->_errno = EINVAL;
        return -1;
    }
    
    return r;
}