Subversion Repositories planix.SVN

#include <unistd.h>
#include <string.h>
#include <sys/uio.h>

int
readv(int fd, struct iovec *v, int ent)
{
        int x, i, n, len;
        char buf[10*1024];

        for(len = i = 0; i < ent; i++)
                len += v[i].iov_len;
        if(len > sizeof(buf))
                len = sizeof(buf);

        len = read(fd, buf, len);
        if(len <= 0)
                return len;

        for(n = i = 0; n < len && i < ent; i++){
                x = len - n;
                if(x > v[i].iov_len)
                        x = v[i].iov_len;
                memmove(v[i].iov_base, buf + n, x);
                n += x;
        }

        return len;
}