/* virt-hostinfo
 * Copyright (C) 2009 Red Hat Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <syslog.h>

#include <apr_general.h>
#include <apr_errno.h>

#include "hostinfod.h"

void
init_syslog (void)
{
  openlog ("hostinfo", 0, LOG_DAEMON);
}

static void
print (int level, const char *msg)
{
  const char *errwarn;
  switch (level) {
  case LOG_WARNING: errwarn = "warning"; break;
  case LOG_ERR:     errwarn = "error"; break;
  default:          errwarn = "info";
  }

  if (messages_to_stderr)
    fprintf (stderr, "hostinfo: %s: %s\n", errwarn, msg);
  syslog (LOG_DAEMON|level, "%s: %s", errwarn, msg);
}

void
debug (const char *fs, ...)
{
  va_list args;
  char *msg;

  if (verbose) {
    va_start (args, fs);
    int err = vasprintf (&msg, fs, args);
    va_end (args);

    if (err < 0) return;

    print (LOG_INFO, msg);
    free (msg);
  }
}

void
message (const char *fs, ...)
{
  va_list args;
  char *msg;

  va_start (args, fs);
  int err = vasprintf (&msg, fs, args);
  va_end (args);

  if (err < 0) return;

  print (LOG_INFO, msg);
  free (msg);
}

void
error (const char *fs, ...)
{
  va_list args;
  char *msg;

  va_start (args, fs);
  int err = vasprintf (&msg, fs, args);
  va_end (args);

  if (err < 0) return;

  print (LOG_ERR, msg);
  free (msg);
}

void
warning (const char *fs, ...)
{
  va_list args;
  char *msg;

  va_start (args, fs);
  int err = vasprintf (&msg, fs, args);
  va_end (args);

  if (err < 0) return;

  print (LOG_WARNING, msg);
  free (msg);
}

void
perrorf (const char *fs, ...)
{
  va_list args;
  char *msg;
  int errnum = errno;

  va_start (args, fs);
  int err = vasprintf (&msg, fs, args);
  va_end (args);

  if (err < 0) return;

#ifndef _GNU_SOURCE
  char buf[256];
  strerror_r (errnum, buf, sizeof buf);
#else
  char _buf[256];
  char *buf;
  buf = strerror_r (errnum, _buf, sizeof _buf);
#endif

  msg = realloc (msg, strlen (msg) + 2 + strlen (buf) + 1);
  strcat (msg, ": ");
  strcat (msg, buf);

  print (LOG_ERR, msg);
  free (msg);
}

void
pwarningf (const char *fs, ...)
{
  va_list args;
  char *msg;
  int errnum = errno;

  va_start (args, fs);
  int err = vasprintf (&msg, fs, args);
  va_end (args);

  if (err < 0) return;

#ifndef _GNU_SOURCE
  char buf[256];
  strerror_r (errnum, buf, sizeof buf);
#else
  char _buf[256];
  char *buf;
  buf = strerror_r (errnum, _buf, sizeof _buf);
#endif

  msg = realloc (msg, strlen (msg) + 2 + strlen (buf) + 1);
  strcat (msg, ": ");
  strcat (msg, buf);

  print (LOG_WARNING, msg);
  free (msg);
}

void
paprerror (apr_status_t r, const char *fs, ...)
{
  va_list args;
  char *msg;
  char buf[256];

  va_start (args, fs);
  int err = vasprintf (&msg, fs, args);
  va_end (args);

  if (err < 0) return;

  apr_strerror (r, buf, sizeof buf);

  msg = realloc (msg, strlen (msg) + 2 + strlen (buf) + 1);
  strcat (msg, ": ");
  strcat (msg, buf);

  print (LOG_ERR, msg);
  free (msg);
}