int
procfs_doproccmdline(PFS_FILL_ARGS)
{
/*
* If we are using the ps/cmdline caching, use that. Otherwise
* read argv from the process space.
* Note that if the argv is no longer available, we deliberately
* don't fall back on p->p_comm or return an error: the authentic
* Linux behaviour is to return zero-length in this case.
*/
PROC_LOCK(p);
if (p->p_args && p_cansee(td, p) == 0) {
sbuf_bcpy(sb, p->p_args->ar_args, p->p_args->ar_length);
PROC_UNLOCK(p);
return (0);
}
if ((p->p_flag & P_SYSTEM) != 0) {
PROC_UNLOCK(p);
return (0);
}
PROC_UNLOCK(p);
return (proc_getargv(td, p, sb));
}
/* re-use off */
off = (sb->sb_data + sb->sb_datalen) - from;
if (off > len)
off = len;
memcpy(to, from, off);
len -= off;
if (len)
memcpy(to+off, sb->sb_data, len);
}
}
#else /* VBOX_WITH_SLIRP_BSD_SBUF */
void
sbappend (PNATState pData, struct socket *so, struct mbuf *m)
{
int ret = 0;
int mlen = 0;
caddr_t buf = NULL;
STAM_PROFILE_START(&pData->StatIOSBAppend_pf, a);
LogFlow(("sbappend: so = %R[natsock], m = %lx, m->m_len = %d\n", so, (long)m, m ? m->m_len : 0));
STAM_COUNTER_INC(&pData->StatIOSBAppend);
mlen = m_length(m, NULL);
if (mlen <= 0)
{
STAM_COUNTER_INC(&pData->StatIOSBAppend_zm);
goto done;
}
/*
* We only write if there's nothing in the buffer,
* ottherwise it'll arrive out of order, and hence corrupt
*/
buf = RTMemAlloc(mlen);
if (buf == NULL)
{
ret = 0;
goto no_sent;
}
m_copydata(m, 0, mlen, buf);
/*
* If there is urgent data, call sosendoob
* if not all was sent, sowrite will take care of the rest
* (The rest of this function is just an optimisation)
*/
if (so->so_urgc)
{
sbuf_bcpy(&so->so_rcv, buf, mlen);
RTMemFree(buf);
m_free(pData, m);
sosendoob(so);
return;
}
if(!sbuf_len(&so->so_rcv))
ret = send(so->s, buf, mlen, 0);
no_sent:
if (ret <= 0)
{
STAM_COUNTER_INC(&pData->StatIOSBAppend_wf);
/*
* Nothing was written
* It's possible that the socket has closed, but
* we don't need to check because if it has closed,
* it will be detected in the normal way by soread()
*/
sbuf_bcpy(&so->so_rcv, buf, mlen);
STAM_PROFILE_STOP(&pData->StatIOSBAppend_pf_wf, a);
goto done;
}
else if (ret != mlen)
{
STAM_COUNTER_INC(&pData->StatIOSBAppend_wp);
/*
* Something was written, but not everything..
* sbappendsb the rest
*/
sbuf_bcpy(&so->so_rcv, &buf[ret + 1], mlen - ret);
STAM_PROFILE_STOP(&pData->StatIOSBAppend_pf_wp, a);
goto done;
} /* else */
/* Whatever happened, we free the mbuf */
STAM_COUNTER_INC(&pData->StatIOSBAppend_wa);
STAM_PROFILE_STOP(&pData->StatIOSBAppend_pf_wa, a);
done:
RTMemFree(buf);
m_freem(pData, m);
}