Subversion Repositories planix.SVN

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

/* bsd extensions */
#include <sys/uio.h>
#include <sys/socket.h>

#include "priv.h"

int
writev(int fd, struct iovec *v, int ent)
{
        int i, n, written;
        char *t, *e, *f;
        char buf[10*1024];

        written = 0;
        t = buf;
        e = buf+sizeof(buf);
        for(;ent ; v++, ent--){
                n = v->iov_len;
                f = v->iov_base;
                while(n > 0){
                        i = e-t;
                        if(n < i){
                                memmove(t, f, n);
                                t += n;
                                break;
                        }
                        memmove(t, f, i);
                        n -= i;
                        f += i;
                        i = write(fd, buf, sizeof(buf));
                        if(i < 0){
                                if(written > 0){
                                        return written;
                                }else{
                                        _syserrno();
                                        return -1;
                                }
                        }
                        written += i;
                        if(i != sizeof(buf)) {
                                return written;
                        }
                        t = buf;
                }
        }
        i = t - buf;
        if(i > 0){
                n = write(fd, buf, i);
                if(n < 0){
                        if(written == 0){
                                _syserrno();
                                return -1;
                        }
                } else
                        written += n;
        }
        return written;
}