C++ err_msg函数代码示例

void
tws::geoarray::load_geoarrays(std::map<std::string, geoarray_t>& arrays,
                              const std::string& input_file)
{
  arrays.clear();

  try
  {
    std::unique_ptr<rapidjson::Document> doc(tws::core::open_json_file(input_file));

    const rapidjson::Value& jarrays = (*doc)["arrays"];

    if(!jarrays.IsArray())
    {
      boost::format err_msg("error parsing input file '%1%': expected a vector of array metadata.");

      throw tws::parse_error() << tws::error_description((err_msg % input_file).str());
    }

    const rapidjson::SizeType nelements = jarrays.Size();

    for(rapidjson::SizeType i = 0; i != nelements; ++i)
    {
      const rapidjson::Value& jarray = jarrays[i];

      if(jarray.IsNull())
        continue;

      geoarray_t g_array = read_array_metadata(jarray);

      arrays.insert(std::make_pair(g_array.name, g_array));
    }
  }
  catch(...)
  {
    throw;
  }
  
}

int select_table()
{
 int i,j;
 Window temp=main_win;
 char *n[MAX_TAB],key[MAX_TAB],ch;
 for(i=0;i<NTable;i++){
   n[i]=(char *)malloc(25);
   key[i]='a'+i;
   sprintf(n[i],"%c: %s",key[i],my_table[i].name);
 }
 key[NTable]=0;  
 ch=(char)pop_up_list(&temp,"Table",n,key,NTable,12,0,10,0,
		       no_hint,info_pop,info_message);
   for(i=0;i<NTable;i++)free(n[i]);
  j=(int)(ch-'a');
  if(j<0||j>=NTable){
    err_msg("Not a valid table");
    return -1;
  }
  return j;

}

static int
write_root_summary(datum_t *key, datum_t *val, void *arg)
{
   char *name, *type;
   char sum[256];
   char num[256];
   Metric_t *metric;
   int rc;
   struct type_tag *tt;

   name = (char*) key->data;
   metric = (Metric_t*) val->data;
   type = getfield(metric->strings, metric->type);

   /* Summarize all numeric metrics */
   tt = in_type_list(type, strlen(type));
   /* Don't write a summary for an unknown or STRING type. */
   if (!tt || (tt->type == STRING)) 
       return 0;

   /* We log all our sums in double which does not suffer from
      wraparound errors: for example memory KB exceeding 4TB. -twitham */
   sprintf(sum, "%.5f", metric->val.d);

   sprintf(num, "%u", metric->num);

   /* err_msg("Writing Overall Summary for metric %s (%s)", name, sum); */

   /* Save the data to a rrd file unless write_rrds == off */
	 if (gmetad_config.write_rrds == 0)
	     return 0;

   rc = write_data_to_rrd( NULL, NULL, name, sum, num, 15, 0, metric->slope);
   if (rc)
      {
         err_msg("Unable to write meta data for metric %s to RRD", name);
      }
   return 0;
}

t_ram		*xdeclare(void)
{
  t_ram		*ram;

  ram = malloc(sizeof(*ram));
  if (ram == NULL)
    {
      err_msg("Critical error: ", 0, "Can't init XMap system.");
      exit(EXIT_FAILURE);
    }
  ram->next = NULL;
  ram->memory = NULL;
  ram->name = "Xmap root";
  debug(-1, "XMap System: No leak allowed", "");
  xmalloc(0, (char*)ram, INIT);
  xfree(ram, INIT);
  xfreedom(ram, INIT);
  xftmp(ram, INIT);
  showmem(INIT, ram);
  liveliness(ram, INIT);
  return (ram);
}

int main (int argc, char **argv)
{
	FILE *fp;
	struct mnttab mp;
	int ret;

	if (argc != 2)
		err_quit ("Usage: hasmntopt mount_option");

	if ((fp = fopen ("/etc/mnttab", "r")) == NULL)
		err_msg ("Can't open /etc/mnttab");

	while ((ret = getmntent (fp, &mp)) == 0) {
		if (hasmntopt (&mp, argv [1]))
			printf ("%s\n", mp.mnt_mountp);
	}

	if (ret != -1)
		err_quit ("Bad /etc/mnttab file.\n");

	return (0);
}

int main(int argc, char **argv) {

					//start of the address from argv
	char 			*ptr, **pptr;
	char 			str[INET_ADDRSTRLEN];
	struct hostent *hptr;

	while(--argc > 0) {

		ptr = *++argv;

		//gethostbyname is a function to get the ip from DNS - numeric tpye
		if((hptr = gethostbyname(ptr)) == NULL) {

			err_msg("gethostbyname error for host: %s: %s", ptr, hstrerror(h_errno));
			continue;
		}
		//This is the “official” name of the host.
		printf("official hostname: %s\r\n", hptr->h_name);

		//These are alternative names for the host, represented as a null-terminated vector of strings.
		for(pptr = hptr->h_aliases; *pptr != NULL; pptr++) {
			printf("\t alias: %s\r\n", *pptr);
		}


		//pointer to all known IPs for that DNS
		pptr = hptr->h_addr_list; // vector of addresses

		for( ; *pptr != NULL; pptr++) {

			printf("\t Addr %lu \r\n", hptr->h_addr);
			//AF_INET or AF_INET6 lattter is for IPV6
			printf("\t address :%s\r\n", Inet_ntop(hptr->h_addrtype, *pptr, str, sizeof(str)));
		}
	}

	exit(0);
}

static int cs_open (char *path, int oflag)
{
	int len;
	char buf [12];
	struct iovec iov [3];
	int pipe_fd [2];

	if (pipe (pipe_fd) == -1)
		err_msg ("pipe failed");

	switch (fork ()) {
		case -1:	
			err_msg ("fork failed");

		case 0:
			close (pipe_fd [0]);
			if (pipe_fd [1] != STDIN_FILENO) {
				if (dup2 (pipe_fd [1], STDIN_FILENO) != STDIN_FILENO)
					err_msg ("Can't dup2 stdin");
			}
			if (pipe_fd [1] != STDOUT_FILENO) {
				if (dup2 (pipe_fd [1], STDOUT_FILENO) != STDOUT_FILENO)
					err_msg ("Can't dup2 stdout");
			}

			execl ("./opend1", "opend", NULL);
			err_msg ("exec failed");

		default:
			close (pipe_fd [1]);

			snprintf (buf, 12, " %d", oflag);
			iov [0].iov_base = "open ";
			iov [0].iov_len = strlen ("open ");
			iov [1].iov_base = path;
			iov [1].iov_len = strlen (path);
			iov [2].iov_base = buf;
			iov [2].iov_len = strlen (buf) + 1;

			len = iov [0].iov_len + iov [1].iov_len + iov [2].iov_len;
			if (writev (pipe_fd [0], &iov [0], 3) != len)
				err_msg ("writev failed");

			return (recv_fd (pipe_fd [0]));
	}
}

int main (int argc, char **argv)
{
	struct stat buf1;
	struct stat buf2;

	if (argc != 2)
		err_quit ("Usage: break_chroot directory");

	if (chdir ("/") == -1)
		err_msg ("Can't chdir to /");

	if (chroot (argv [1]) == -1)
		err_msg ("Can't chroot to %s", argv [1]);

	for (;;) {
		if (stat (".", &buf1) == -1)
			err_msg ("Can't stat .");
		if (stat ("..", &buf2) == -1)
			err_msg ("Can't stat ..");

		if ((buf1.st_dev == buf2.st_dev) && (buf1.st_ino == buf2.st_ino))
			break;

		if (chdir ("..") == -1)
			err_msg ("Can't chdir to ..");
	}

	chroot (".");

	switch (fork ()) {
		case -1:
			err_msg ("Can't fork");
			break;

		case 0:
			execl ("/sbin/sh", "-sh", NULL);
			execl ("/bin/sh", "-sh", NULL);
			printf ("Can't find a shell - exiting.\n");
			_exit (0);

		default:
			break;
	}

	return (0);
}

int main (int argc, char **argv)
{
	FILE *fp;
	struct vfstab vp;
	int ret;
	int i;

	if ((fp = fopen ("/etc/vfstab", "r")) == NULL)
		err_msg ("Can't open /etc/vfstab");

	if (argc == 1) {
		while ((ret = getvfsent (fp, &vp)) == 0)
			print_vfstab (&vp);

		if (ret != -1)
			err_quit ("Bad /etc/vfstab file.\n");
	}
	else {
		for (i = 1; argc-- > 1; i++) {
			switch (getvfsfile (fp, &vp, argv [i])) {
				case -1:
					rewind (fp);
					break;

				case 0:
					print_vfstab (&vp);
					rewind (fp);
					break;

				default:
					err_quit ("Bad /etc/vfstab file.\n");
					break;
			}
		}
	}

	return (0);
}

static void handle_event(nge_event * e)
{
	switch (e->state_type) {
	case SERVICE_STATE_CHANGE:
		service_change(e->payload.service_state_change.service,
			       e->payload.service_state_change.is,
			       e->payload.service_state_change.state_name,
			       e->payload.service_state_change.percent_started,
			       e->payload.service_state_change.percent_stopped,
			       e->payload.service_state_change.service_type,
			       e->payload.service_state_change.hidden);
		return;
	case SYSTEM_STATE_CHANGE:
		sys_state(e->payload.system_state_change.system_state,
			  e->payload.system_state_change.runlevel);
		return;
	case ERR_MSG:
		err_msg(e->payload.err_msg.mt,
			e->payload.err_msg.file,
			e->payload.err_msg.func,
			e->payload.err_msg.line, e->payload.err_msg.message);
		return;
	case CONNECT:
		connected(e->payload.connect.pver,
			  e->payload.connect.initng_version);
		return;
	case DISCONNECT:
		disconnected();
		return;
	case SERVICE_OUTPUT:
		service_output(e->payload.service_output.service,
			       e->payload.service_output.process,
			       e->payload.service_output.output);
		return;
	default:
		return;
	}
}

static int init_raw_4_socket(struct ospfd *ospfd)
{
	int fd, on = 1, ret, flags;

	fd = socket(AF_INET, SOCK_RAW, IPPROTO_OSPF);
	if (fd < 0) {
		err_sys("Failed to create raw IPPROTO_OSPF socket");
		return FAILURE;
	}

	ret = setsockopt(fd, IPPROTO_IP, IP_HDRINCL, &on, sizeof(on));
	if (ret < 0) {
		err_sys("Failed to set IP_HDRINCL socket option");
		return FAILURE;
	}

	ret = setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &on, sizeof(on));
	if (ret < 0) {
		err_sys("Failed to set IP_PKTINFO socket option");
		return FAILURE;
	}

	ret = join_router_4_multicast(fd);
	if (ret != SUCCESS) {
		err_msg("cannot join multicast groups");
		return FAILURE;
	}

	/* make socket non-blocking */
	if ((flags = fcntl(fd, F_GETFL, 0)) == -1)
		flags = 0;
	fcntl(fd, F_SETFL, flags | O_NONBLOCK);


	ospfd->network.fd = fd;

	return SUCCESS;
}

IMutexLock::IMutexLock()
{
#ifdef  WIN32
  if (InitializeCriticalSectionAndSpinCount(&_M_mutex, 2000) != TRUE) {
    DeleteCriticalSection(&_M_mutex);
    std::cerr << "init critical section failed !" << std::endl;
  }
#elif defined(HAVE_PTHREAD)
  int       _ret_code = 0;
  if ((_ret_code = pthread_mutexattr_init(&_M_mutexattr)) != 0)
    std::cerr << "mutex attribute init failed !" << std::endl;
  if (_ret_code == 0)
    _ret_code = pthread_mutexattr_settype(&_M_mutexattr, PTHREAD_MUTEX_ERRORCHECK);
  if (_ret_code == 0)
    if ((_ret_code = pthread_mutex_init(&_M_mutex, &_M_mutexattr)) != 0)
      err_msg("pthread_mutex_init failed");

  if (_ret_code != 0) {
    (void)pthread_mutex_destroy(&_M_mutex);
    (void)pthread_mutexattr_destroy(&_M_mutexattr);
  }
#endif  // end of WIN32
}

/* NONE
 * ----
 * Input parameters:
 *   numChans - number of channels in groupCol and qualCol
 *   groupCol - the GROUPING column
 *   qualCol  - the QUALITY column
 */
int grp_do_none(long numChans, short *groupCol, short *qualCol,
                dsErrList *errList){

    long ii;

    if((numChans <= 0) || !groupCol || !qualCol){
        if(errList)
            dsErrAdd(errList, dsDMGROUPBADPARAMERR, Accumulation,
                     Generic);
        else
            err_msg("ERROR: At least one input parameter has an "
                    "invalid value.\n");
        return(GRP_ERROR);
    }
    
    /* Reset all columns */
    for(ii = 0; ii < numChans; ii++){
        groupCol[ii] = GRP_BEGIN;
        qualCol[ii] = GRP_GOOD;
    }
    
    return(GRP_SUCCESS);
}

int main (int argc, char **argv)
{
	pid_t pid;
	prusage_t buf;
	int i;

	if (argc == 1) {
		if (getprusage (-1, &buf) == -1)
			err_msg ("getprusage failed");
		print_rusage (getpid (), &buf);
	}
	else {
		for (i = 1; i < argc; i++) {
			pid = atoi (argv [i]);
			if (getprusage (pid, &buf) == -1)
				err_ret ("getprusage failed");
			else
				print_rusage (pid, &buf);
		}
	}

	return (0);
}

int					put(char *root, int *cs, char *cmd, int *id)
{
	int				fd;
	char			**cmd_args;
	int				len;
	int				ret;

	(void)root;
	cmd_args = ssplit(cmd, ' ');
	if (!check_errors(cs, cmd_args))
		return (0);
	ret = 0, send(*cs, (void *)&ret, sizeof(uint32_t), 0);
	if (!receive_file_header(cs, cmd_args, &len))
		return (afree(cmd_args), 0);
	if ((fd = open(cmd_args[1], O_RDWR | O_CREAT, 0644)) == -1)
		return (afree(cmd_args), err_msg(OPEN_ERR), 0);
	write_streaming_packets(cs, fd, &len, id);
	close(fd);
	afree(cmd_args);
	if (ret = 1, send(*cs, (void *)&ret, sizeof(uint32_t), 0) == -1)
		return (0);
	return (1);
}