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/* libguestfs
* Copyright (C) 2009-2012 Red Hat Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* Helper functions for the actions defined in src/actions.c */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include "guestfs.h"
#include "guestfs-internal.h"
#include "guestfs-internal-actions.h"
#include "guestfs_protocol.h"
/* Check the return message from a call for validity. */
int
guestfs___check_reply_header (guestfs_h *g,
const struct guestfs_message_header *hdr,
unsigned int proc_nr, unsigned int serial)
{
if (hdr->prog != GUESTFS_PROGRAM) {
error (g, "wrong program (%d/%d)", hdr->prog, GUESTFS_PROGRAM);
return -1;
}
if (hdr->vers != GUESTFS_PROTOCOL_VERSION) {
error (g, "wrong protocol version (%d/%d)",
hdr->vers, GUESTFS_PROTOCOL_VERSION);
return -1;
}
if (hdr->direction != GUESTFS_DIRECTION_REPLY) {
error (g, "unexpected message direction (%d/%d)",
hdr->direction, GUESTFS_DIRECTION_REPLY);
return -1;
}
if (hdr->proc != proc_nr) {
error (g, "unexpected procedure number (%d/%d)", hdr->proc, proc_nr);
return -1;
}
if (hdr->serial != serial) {
error (g, "unexpected serial (%d/%d)", hdr->serial, serial);
return -1;
}
return 0;
}
/* Check the appliance is up when running a daemon_function. */
int
guestfs___check_appliance_up (guestfs_h *g, const char *caller)
{
if (guestfs__is_config (g) || guestfs__is_launching (g)) {
error (g, "%s: call launch before using this function\\n(in guestfish, don't forget to use the 'run' command)",
caller);
return -1;
}
return 0;
}
/* Convenience wrapper for tracing. */
FILE *
guestfs___trace_open (guestfs_h *g)
{
assert (g->trace_fp == NULL);
g->trace_buf = NULL;
g->trace_len = 0;
g->trace_fp = open_memstream (&g->trace_buf, &g->trace_len);
if (g->trace_fp)
return g->trace_fp;
else
return stderr;
}
void
guestfs___trace_send_line (guestfs_h *g)
{
char *buf;
size_t len;
if (g->trace_fp) {
fclose (g->trace_fp);
g->trace_fp = NULL;
/* The callback might invoke other libguestfs calls, so keep
* a copy of the pointer to the buffer and length.
*/
buf = g->trace_buf;
len = g->trace_len;
g->trace_buf = NULL;
guestfs___call_callbacks_message (g, GUESTFS_EVENT_TRACE, buf, len);
free (buf);
}
}
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