[mirror_frr.git] / vtysh / vtysh_config.c

/* Configuration generator.
   Copyright (C) 2000 Kunihiro Ishiguro

This file is part of GNU Zebra.

GNU Zebra 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, or (at your option) any
later version.

GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.  */

#include <zebra.h>

#include "command.h"
#include "linklist.h"
#include "memory.h"

#include "vtysh/vtysh.h"

vector configvec;

struct config
{
  /* Configuration node name. */
  char *name;

  /* Configuration string line. */
  struct list *line;

  /* Configuration can be nest. */
  struct config *config;

  /* Index of this config. */
  u_int32_t index;
};

struct list *config_top;
\f
int
line_cmp (char *c1, char *c2)
{
  return strcmp (c1, c2);
}

void
line_del (char *line)
{
  XFREE (MTYPE_VTYSH_CONFIG_LINE, line);
}

struct config *
config_new ()
{
  struct config *config;
  config = XCALLOC (MTYPE_VTYSH_CONFIG, sizeof (struct config));
  return config;
}

int
config_cmp (struct config *c1, struct config *c2)
{
  return strcmp (c1->name, c2->name);
}

void
config_del (struct config* config)
{
  list_delete (config->line);
  if (config->name)
    XFREE (MTYPE_VTYSH_CONFIG_LINE, config->name);
  XFREE (MTYPE_VTYSH_CONFIG, config);
}

struct config *
config_get (int index, char *line)
{
  struct config *config;
  struct config *config_loop;
  struct list *master;
  struct listnode *nn;

  config = config_loop = NULL;

  master = vector_lookup_ensure (configvec, index);

  if (! master)
    {
      master = list_new ();
      master->del = (void (*) (void *))config_del;
      master->cmp = (int (*)(void *, void *)) config_cmp;
      vector_set_index (configvec, index, master);
    }
  
  LIST_LOOP (master, config_loop, nn)
    {
      if (strcmp (config_loop->name, line) == 0)
	config = config_loop;
    }

  if (! config)
    {
      config = config_new ();
      config->line = list_new ();
      config->line->del = (void (*) (void *))line_del;
      config->line->cmp = (int (*)(void *, void *)) line_cmp;
      config->name = XSTRDUP (MTYPE_VTYSH_CONFIG_LINE, line);
      config->index = index;
      listnode_add (master, config);
    }
  return config;
}

void
config_add_line (struct list *config, char *line)
{
  listnode_add (config, XSTRDUP (MTYPE_VTYSH_CONFIG_LINE, line));
}

void
config_add_line_uniq (struct list *config, char *line)
{
  struct listnode *nn;
  char *pnt;

  LIST_LOOP (config, pnt, nn)
    {
      if (strcmp (pnt, line) == 0)
	return;
    }
  listnode_add_sort (config, XSTRDUP (MTYPE_VTYSH_CONFIG_LINE, line));
}

void
vtysh_config_parse_line (char *line)
{
  char c;
  static struct config *config = NULL;

  if (! line)
    return;

  c = line[0];

  if (c == '\0')
    return;

  /* printf ("[%s]\n", line); */

  switch (c)
    {
    case '!':
    case '#':
      break;
    case ' ':
      /* Store line to current configuration. */
      if (config)
	{
	  if (strncmp (line, " address-family vpnv4", strlen (" address-family vpnv4")) == 0)
	    config = config_get (BGP_VPNV4_NODE, line);
	  else if (strncmp (line, " address-family ipv4 multicast", strlen (" address-family ipv4 multicast")) == 0)
	    config = config_get (BGP_IPV4M_NODE, line);
	  else if (strncmp (line, " address-family ipv6", strlen (" address-family ipv6")) == 0)
	    config = config_get (BGP_IPV6_NODE, line);
	  else if (config->index == RMAP_NODE || config->index == INTERFACE_NODE )
	    config_add_line_uniq (config->line, line);
	  else
	    config_add_line (config->line, line);
	}
      else
	config_add_line (config_top, line);
      break;
    default:
      if (strncmp (line, "interface", strlen ("interface")) == 0)
	config = config_get (INTERFACE_NODE, line);
      else if (strncmp (line, "router rip", strlen ("router rip")) == 0)
	config = config_get (RIP_NODE, line);
      else if (strncmp (line, "router ripng", strlen ("router ripng")) == 0)
	config = config_get (RIPNG_NODE, line);
      else if (strncmp (line, "router ospf", strlen ("router ospf")) == 0)
	config = config_get (OSPF_NODE, line);
      else if (strncmp (line, "router ospf6", strlen ("router ospf6")) == 0)
	config = config_get (OSPF6_NODE, line);
      else if (strncmp (line, "router bgp", strlen ("router bgp")) == 0)
	config = config_get (BGP_NODE, line);
      else if (strncmp (line, "router isis", strlen ("router isis")) == 0)
  	config = config_get (ISIS_NODE, line);
      else if (strncmp (line, "router", strlen ("router")) == 0)
	config = config_get (BGP_NODE, line);
      else if (strncmp (line, "route-map", strlen ("route-map")) == 0)
	config = config_get (RMAP_NODE, line);
      else if (strncmp (line, "access-list", strlen ("access-list")) == 0)
	config = config_get (ACCESS_NODE, line);
      else if (strncmp (line, "ipv6 access-list", strlen ("ipv6 access-list")) == 0)
	config = config_get (ACCESS_IPV6_NODE, line);
      else if (strncmp (line, "ip prefix-list", strlen ("ip prefix-list")) == 0)
	config = config_get (PREFIX_NODE, line);
      else if (strncmp (line, "ipv6 prefix-list", strlen ("ipv6 prefix-list")) == 0)
	config = config_get (PREFIX_IPV6_NODE, line);
      else if (strncmp (line, "ip as-path access-list", strlen ("ip as-path access-list")) == 0)
	config = config_get (AS_LIST_NODE, line);
      else if (strncmp (line, "ip community-list", strlen ("ip community-list")) == 0)
	config = config_get (COMMUNITY_LIST_NODE, line);
      else if (strncmp (line, "ip route", strlen ("ip route")) == 0)
	config = config_get (IP_NODE, line);
      else if (strncmp (line, "ipv6 route", strlen ("ipv6 route")) == 0)
   	config = config_get (IP_NODE, line);
      else if (strncmp (line, "key", strlen ("key")) == 0)
	config = config_get (KEYCHAIN_NODE, line);
      else
	{
	  if (strncmp (line, "log", strlen ("log")) == 0
	      || strncmp (line, "hostname", strlen ("hostname")) == 0
	      || strncmp (line, "password", strlen ("hostname")) == 0)
	    config_add_line_uniq (config_top, line);
	  else
	    config_add_line (config_top, line);
	  config = NULL;
	}
      break;
    }
}

void
vtysh_config_parse (char *line)
{
  char *begin;
  char *pnt;
  
  begin = pnt = line;

  while (*pnt != '\0')
    {
      if (*pnt == '\n')
	{
	  *pnt++ = '\0';
	  vtysh_config_parse_line (begin);
	  begin = pnt;
	}
      else
	{
	  pnt++;
	}
    }
}

/* Macro to check delimiter is needed between each configuration line
   or not.  */
#define NO_DELIMITER(I)  \
  ((I) == ACCESS_NODE || (I) == PREFIX_NODE || (I) == IP_NODE \
   || (I) == AS_LIST_NODE || (I) == COMMUNITY_LIST_NODE || \
   (I) == ACCESS_IPV6_NODE || (I) == PREFIX_IPV6_NODE)

/* Display configuration to file pointer.  */
void
vtysh_config_dump (FILE *fp)
{
  struct listnode *nn;
  struct listnode *nm;
  struct config *config;
  struct list *master;
  char *line;
  int i;

  LIST_LOOP (config_top, line, nn)
    {
      fprintf (fp, "%s\n", line);
      fflush (fp);
    }
  fprintf (fp, "!\n");
  fflush (fp);

  for (i = 0; i < vector_max (configvec); i++)
    if ((master = vector_slot (configvec, i)) != NULL)
      {
	LIST_LOOP (master, config, nn)
	  {
	    fprintf (fp, "%s\n", config->name);
	    fflush (fp);

	    LIST_LOOP (config->line, line, nm)
	      {
		fprintf  (fp, "%s\n", line);
		fflush (fp);
	      }
	    if (! NO_DELIMITER (i))
	      {
		fprintf (fp, "!\n");
		fflush (fp);
	      }
	  }
	if (NO_DELIMITER (i))
	  {
	    fprintf (fp, "!\n");
	    fflush (fp);
	  }
      }

  for (i = 0; i < vector_max (configvec); i++)
    if ((master = vector_slot (configvec, i)) != NULL)
      {
	list_delete (master);
	vector_slot (configvec, i) = NULL;
      }
  list_delete_all_node (config_top);
}

/* Read up configuration file from file_name. */
static void
vtysh_read_file (FILE *confp)
{
  int ret;
  struct vty *vty;

  vty = vty_new ();
  vty->fd = 0;			/* stdout */
  vty->type = VTY_TERM;
  vty->node = CONFIG_NODE;
  
  vtysh_execute_no_pager ("enable");
  vtysh_execute_no_pager ("configure terminal");

  /* Execute configuration file */
  ret = vtysh_config_from_file (vty, confp);

  vtysh_execute_no_pager ("end");
  vtysh_execute_no_pager ("disable");

  vty_close (vty);

  if (ret != CMD_SUCCESS) 
    {
      switch (ret)
	{
	case CMD_ERR_AMBIGUOUS:
	  fprintf (stderr, "Ambiguous command.\n");
	  break;
	case CMD_ERR_NO_MATCH:
	  fprintf (stderr, "There is no such command.\n");
	  break;
	}
      fprintf (stderr, "Error occured during reading below line.\n%s\n", 
	       vty->buf);
      exit (1);
    }
}

/* Read up configuration file from file_name. */
void
vtysh_read_config (char *config_file,
		   char *config_current_dir,
		   char *config_default_dir)
{
  char *cwd;
  FILE *confp = NULL;
  char *fullpath;

  /* If -f flag specified. */
  if (config_file != NULL)
    {
      if (! IS_DIRECTORY_SEP (config_file[0]))
	{
	  cwd = getcwd (NULL, MAXPATHLEN);
	  fullpath = XMALLOC (MTYPE_TMP, 
			      strlen (cwd) + strlen (config_file) + 2);
	  sprintf (fullpath, "%s/%s", cwd, config_file);
	}
      else
	fullpath = config_file;

      confp = fopen (fullpath, "r");

      if (confp == NULL)
	{
	  fprintf (stderr, "can't open configuration file [%s]\n", 
		   config_file);
	  exit(1);
	}
    }
  else
    {
      /* Relative path configuration file open. */
      if (config_current_dir)
	confp = fopen (config_current_dir, "r");

      /* If there is no relative path exists, open system default file. */
      if (confp == NULL)
	{
	  confp = fopen (config_default_dir, "r");
	  if (confp == NULL)
	    {
	      fprintf (stderr, "can't open configuration file [%s]\n",
		       config_default_dir);
	      exit (1);
	    }      
	  else
	    fullpath = config_default_dir;
	}
      else
	{
	  /* Rleative path configuration file. */
	  cwd = getcwd (NULL, MAXPATHLEN);
	  fullpath = XMALLOC (MTYPE_TMP, 
			      strlen (cwd) + strlen (config_current_dir) + 2);
	  sprintf (fullpath, "%s/%s", cwd, config_current_dir);
	}  
    }  
  vtysh_read_file (confp);

  fclose (confp);

  host_config_set (fullpath);
}

void
vtysh_config_write (FILE *fp)
{
  extern struct host host;

  if (host.name)
    fprintf (fp, "hostname %s\n", host.name);
  fprintf (fp, "!\n");
}

void
vtysh_config_init ()
{
  config_top = list_new ();
  config_top->del = (void (*) (void *))line_del;
  configvec = vector_init (1);
}
Commit	Line	Data
718e3744	1	/* Configuration generator.
	2	Copyright (C) 2000 Kunihiro Ishiguro
	3
	4	This file is part of GNU Zebra.
	5
	6	GNU Zebra is free software; you can redistribute it and/or modify it
	7	under the terms of the GNU General Public License as published by the
	8	Free Software Foundation; either version 2, or (at your option) any
	9	later version.
	10
	11	GNU Zebra is distributed in the hope that it will be useful, but
	12	WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GNU Zebra; see the file COPYING. If not, write to the Free
	18	Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
	19	02111-1307, USA. */
	20
	21	#include <zebra.h>
	22
	23	#include "command.h"
	24	#include "linklist.h"
	25	#include "memory.h"
	26
	27	#include "vtysh/vtysh.h"
	28
	29	vector configvec;
	30
	31	struct config
	32	{
	33	/* Configuration node name. */
	34	char *name;
	35
	36	/* Configuration string line. */
	37	struct list *line;
	38
	39	/* Configuration can be nest. */
	40	struct config *config;
	41
	42	/* Index of this config. */
	43	u_int32_t index;
	44	};
	45
	46	struct list *config_top;
	47	\f
	48	int
	49	line_cmp (char c1, char c2)
	50	{
	51	return strcmp (c1, c2);
	52	}
	53
	54	void
	55	line_del (char *line)
	56	{
	57	XFREE (MTYPE_VTYSH_CONFIG_LINE, line);
	58	}
	59
	60	struct config *
	61	config_new ()
	62	{
	63	struct config *config;
	64	config = XCALLOC (MTYPE_VTYSH_CONFIG, sizeof (struct config));
65	return config;
66	}
67
68	int
69	config_cmp (struct config c1, struct config c2)
70	{
71	return strcmp (c1->name, c2->name);
72	}
73
74	void
75	config_del (struct config* config)
76	{
77	list_delete (config->line);
78	if (config->name)
79	XFREE (MTYPE_VTYSH_CONFIG_LINE, config->name);
80	XFREE (MTYPE_VTYSH_CONFIG, config);
81	}
82
83	struct config *
84	config_get (int index, char *line)
85	{
86	struct config *config;
87	struct config *config_loop;
88	struct list *master;
89	struct listnode *nn;
90
91	config = config_loop = NULL;
92
93	master = vector_lookup_ensure (configvec, index);
94
95	if (! master)
96	{
97	master = list_new ();
98	master->del = (void () (void ))config_del;
99	master->cmp = (int ()(void , void *)) config_cmp;
100	vector_set_index (configvec, index, master);
101	}
102
103	LIST_LOOP (master, config_loop, nn)
104	{
105	if (strcmp (config_loop->name, line) == 0)
106	config = config_loop;
107	}
108
109	if (! config)
110	{
111	config = config_new ();
112	config->line = list_new ();
113	config->line->del = (void () (void ))line_del;
114	config->line->cmp = (int ()(void , void *)) line_cmp;
115	config->name = XSTRDUP (MTYPE_VTYSH_CONFIG_LINE, line);
116	config->index = index;
117	listnode_add (master, config);
118	}
119	return config;
120	}
121
122	void
123	config_add_line (struct list config, char line)
124	{
125	listnode_add (config, XSTRDUP (MTYPE_VTYSH_CONFIG_LINE, line));
126	}
127
128	void
129	config_add_line_uniq (struct list config, char line)
130	{
131	struct listnode *nn;
132	char *pnt;
133
134	LIST_LOOP (config, pnt, nn)
135	{
136	if (strcmp (pnt, line) == 0)
137	return;
138	}
139	listnode_add_sort (config, XSTRDUP (MTYPE_VTYSH_CONFIG_LINE, line));
140	}
141
142	void
143	vtysh_config_parse_line (char *line)
144	{
145	char c;
146	static struct config *config = NULL;
147
148	if (! line)
149	return;
150
151	c = line[0];
152
153	if (c == '\0')
154	return;
155
156	/* printf ("[%s]\n", line); */
157
158	switch (c)
159	{
160	case '!':
161	case '#':
162	break;
163	case ' ':
164	/* Store line to current configuration. */
165	if (config)
166	{
167	if (strncmp (line, " address-family vpnv4", strlen (" address-family vpnv4")) == 0)
168	config = config_get (BGP_VPNV4_NODE, line);
169	else if (strncmp (line, " address-family ipv4 multicast", strlen (" address-family ipv4 multicast")) == 0)
170	config = config_get (BGP_IPV4M_NODE, line);
171	else if (strncmp (line, " address-family ipv6", strlen (" address-family ipv6")) == 0)
172	config = config_get (BGP_IPV6_NODE, line);
97e1c4dc	173	else if (config->index == RMAP_NODE \|\| config->index == INTERFACE_NODE )
718e3744	174	config_add_line_uniq (config->line, line);
	175	else
	176	config_add_line (config->line, line);
	177	}
	178	else
	179	config_add_line (config_top, line);
	180	break;
	181	default:
	182	if (strncmp (line, "interface", strlen ("interface")) == 0)
	183	config = config_get (INTERFACE_NODE, line);
	184	else if (strncmp (line, "router rip", strlen ("router rip")) == 0)
	185	config = config_get (RIP_NODE, line);
97e1c4dc	186	else if (strncmp (line, "router ripng", strlen ("router ripng")) == 0)
b094d260	187	config = config_get (RIPNG_NODE, line);
718e3744	188	else if (strncmp (line, "router ospf", strlen ("router ospf")) == 0)
b094d260	189	config = config_get (OSPF_NODE, line);
97e1c4dc	190	else if (strncmp (line, "router ospf6", strlen ("router ospf6")) == 0)
b094d260	191	config = config_get (OSPF6_NODE, line);
718e3744	192	else if (strncmp (line, "router bgp", strlen ("router bgp")) == 0)
718e3744	193	config = config_get (BGP_NODE, line);
13b8baad	194	else if (strncmp (line, "router isis", strlen ("router isis")) == 0)
c25e458a	195	config = config_get (ISIS_NODE, line);
718e3744	196	else if (strncmp (line, "router", strlen ("router")) == 0)
	197	config = config_get (BGP_NODE, line);
	198	else if (strncmp (line, "route-map", strlen ("route-map")) == 0)
	199	config = config_get (RMAP_NODE, line);
	200	else if (strncmp (line, "access-list", strlen ("access-list")) == 0)
	201	config = config_get (ACCESS_NODE, line);
97e1c4dc	202	else if (strncmp (line, "ipv6 access-list", strlen ("ipv6 access-list")) == 0)
b094d260	203	config = config_get (ACCESS_IPV6_NODE, line);
718e3744	204	else if (strncmp (line, "ip prefix-list", strlen ("ip prefix-list")) == 0)
718e3744	205	config = config_get (PREFIX_NODE, line);
97e1c4dc	206	else if (strncmp (line, "ipv6 prefix-list", strlen ("ipv6 prefix-list")) == 0)
b094d260	207	config = config_get (PREFIX_IPV6_NODE, line);
718e3744	208	else if (strncmp (line, "ip as-path access-list", strlen ("ip as-path access-list")) == 0)
	209	config = config_get (AS_LIST_NODE, line);
	210	else if (strncmp (line, "ip community-list", strlen ("ip community-list")) == 0)
	211	config = config_get (COMMUNITY_LIST_NODE, line);
	212	else if (strncmp (line, "ip route", strlen ("ip route")) == 0)
	213	config = config_get (IP_NODE, line);
97e1c4dc	214	else if (strncmp (line, "ipv6 route", strlen ("ipv6 route")) == 0)
97e1c4dc	215	config = config_get (IP_NODE, line);
718e3744	216	else if (strncmp (line, "key", strlen ("key")) == 0)
	217	config = config_get (KEYCHAIN_NODE, line);
	218	else
	219	{
	220	if (strncmp (line, "log", strlen ("log")) == 0
	221	\|\| strncmp (line, "hostname", strlen ("hostname")) == 0
	222	\|\| strncmp (line, "password", strlen ("hostname")) == 0)
	223	config_add_line_uniq (config_top, line);
	224	else
	225	config_add_line (config_top, line);
	226	config = NULL;
	227	}
	228	break;
	229	}
	230	}
	231
	232	void
	233	vtysh_config_parse (char *line)
	234	{
	235	char *begin;
	236	char *pnt;
	237
	238	begin = pnt = line;
	239
	240	while (*pnt != '\0')
	241	{
	242	if (*pnt == '\n')
	243	{
	244	*pnt++ = '\0';
	245	vtysh_config_parse_line (begin);
	246	begin = pnt;
	247	}
	248	else
	249	{
	250	pnt++;
	251	}
	252	}
	253	}
	254
	255	/* Macro to check delimiter is needed between each configuration line
	256	or not. */
	257	#define NO_DELIMITER(I) \
	258	((I) == ACCESS_NODE \|\| (I) == PREFIX_NODE \|\| (I) == IP_NODE \
97e1c4dc	259	\|\| (I) == AS_LIST_NODE \|\| (I) == COMMUNITY_LIST_NODE \|\| \
97e1c4dc	260	(I) == ACCESS_IPV6_NODE \|\| (I) == PREFIX_IPV6_NODE)
718e3744	261
	262	/* Display configuration to file pointer. */
	263	void
	264	vtysh_config_dump (FILE *fp)
	265	{
	266	struct listnode *nn;
	267	struct listnode *nm;
	268	struct config *config;
	269	struct list *master;
	270	char *line;
	271	int i;
	272
	273	LIST_LOOP (config_top, line, nn)
	274	{
	275	fprintf (fp, "%s\n", line);
	276	fflush (fp);
	277	}
	278	fprintf (fp, "!\n");
	279	fflush (fp);
	280
	281	for (i = 0; i < vector_max (configvec); i++)
	282	if ((master = vector_slot (configvec, i)) != NULL)
	283	{
	284	LIST_LOOP (master, config, nn)
	285	{
	286	fprintf (fp, "%s\n", config->name);
b094d260	287	fflush (fp);
718e3744	288
	289	LIST_LOOP (config->line, line, nm)
	290	{
	291	fprintf (fp, "%s\n", line);
	292	fflush (fp);
	293	}
	294	if (! NO_DELIMITER (i))
	295	{
	296	fprintf (fp, "!\n");
	297	fflush (fp);
	298	}
	299	}
	300	if (NO_DELIMITER (i))
	301	{
	302	fprintf (fp, "!\n");
	303	fflush (fp);
	304	}
	305	}
	306
	307	for (i = 0; i < vector_max (configvec); i++)
	308	if ((master = vector_slot (configvec, i)) != NULL)
	309	{
	310	list_delete (master);
	311	vector_slot (configvec, i) = NULL;
	312	}
	313	list_delete_all_node (config_top);
	314	}
	315
	316	/* Read up configuration file from file_name. */
	317	static void
	318	vtysh_read_file (FILE *confp)
	319	{
	320	int ret;
	321	struct vty *vty;
	322
	323	vty = vty_new ();
	324	vty->fd = 0; /* stdout */
	325	vty->type = VTY_TERM;
	326	vty->node = CONFIG_NODE;
	327
	328	vtysh_execute_no_pager ("enable");
	329	vtysh_execute_no_pager ("configure terminal");
	330
	331	/* Execute configuration file */
	332	ret = vtysh_config_from_file (vty, confp);
	333
	334	vtysh_execute_no_pager ("end");
	335	vtysh_execute_no_pager ("disable");
	336
	337	vty_close (vty);
	338
	339	if (ret != CMD_SUCCESS)
	340	{
	341	switch (ret)
	342	{
	343	case CMD_ERR_AMBIGUOUS:
	344	fprintf (stderr, "Ambiguous command.\n");
	345	break;
	346	case CMD_ERR_NO_MATCH:
	347	fprintf (stderr, "There is no such command.\n");
	348	break;
	349	}
	350	fprintf (stderr, "Error occured during reading below line.\n%s\n",
	351	vty->buf);
352	exit (1);
353	}
354	}
355
356	/* Read up configuration file from file_name. */
357	void
358	vtysh_read_config (char *config_file,
359	char *config_current_dir,
360	char *config_default_dir)
361	{
362	char *cwd;
363	FILE *confp = NULL;
364	char *fullpath;
365
366	/* If -f flag specified. */
367	if (config_file != NULL)
368	{
369	if (! IS_DIRECTORY_SEP (config_file[0]))
370	{
371	cwd = getcwd (NULL, MAXPATHLEN);
372	fullpath = XMALLOC (MTYPE_TMP,
373	strlen (cwd) + strlen (config_file) + 2);
374	sprintf (fullpath, "%s/%s", cwd, config_file);
375	}
376	else
377	fullpath = config_file;
378
379	confp = fopen (fullpath, "r");
380
381	if (confp == NULL)
382	{
383	fprintf (stderr, "can't open configuration file [%s]\n",
384	config_file);
385	exit(1);
386	}
387	}
388	else
389	{
390	/* Relative path configuration file open. */
391	if (config_current_dir)
392	confp = fopen (config_current_dir, "r");
393
394	/* If there is no relative path exists, open system default file. */
395	if (confp == NULL)
396	{
397	confp = fopen (config_default_dir, "r");
398	if (confp == NULL)
399	{
400	fprintf (stderr, "can't open configuration file [%s]\n",
401	config_default_dir);
402	exit (1);
403	}
404	else
405	fullpath = config_default_dir;
406	}
407	else
408	{
409	/* Rleative path configuration file. */
410	cwd = getcwd (NULL, MAXPATHLEN);
411	fullpath = XMALLOC (MTYPE_TMP,
412	strlen (cwd) + strlen (config_current_dir) + 2);
413	sprintf (fullpath, "%s/%s", cwd, config_current_dir);
414	}
415	}
416	vtysh_read_file (confp);
417
418	fclose (confp);
419
420	host_config_set (fullpath);
421	}
422
423	void
424	vtysh_config_write (FILE *fp)
425	{
426	extern struct host host;
427
428	if (host.name)
429	fprintf (fp, "hostname %s\n", host.name);
430	fprintf (fp, "!\n");
431	}
432
433	void
434	vtysh_config_init ()
435	{
436	config_top = list_new ();
437	config_top->del = (void () (void ))line_del;
438	configvec = vector_init (1);
439	}