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/*
* Copyright (c) 2001 Sendmail, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*/
#include <sm/gen.h>
SM_RCSID("@(#)$Sendmail: niprop.c,v 1.8 2001/09/11 04:04:48 gshapiro Exp $")
#if NETINFO
#include <ctype.h>
#include <stdlib.h>
#include <sm/io.h>
#include <sm/assert.h>
#include <sm/debug.h>
#include <sm/string.h>
#include <sm/varargs.h>
#include <sm/heap.h>
/*
** NI_PROPVAL -- NetInfo property value lookup routine
**
** Parameters:
** keydir -- the NetInfo directory name in which to search
** for the key.
** keyprop -- the name of the property in which to find the
** property we are interested. Defaults to "name".
** keyval -- the value for which we are really searching.
** valprop -- the property name for the value in which we
** are interested.
** sepchar -- if non-nil, this can be multiple-valued, and
** we should return a string separated by this
** character.
**
** Returns:
** NULL -- if:
** 1. the directory is not found
** 2. the property name is not found
** 3. the property contains multiple values
** 4. some error occurred
** else -- the value of the lookup.
**
** Example:
** To search for an alias value, use:
** ni_propval("/aliases", "name", aliasname, "members", ',')
**
** Notes:
** Caller should free the return value of ni_proval
*/
# include <netinfo/ni.h>
# define LOCAL_NETINFO_DOMAIN "."
# define PARENT_NETINFO_DOMAIN ".."
# define MAX_NI_LEVELS 256
char *
ni_propval(keydir, keyprop, keyval, valprop, sepchar)
char *keydir;
char *keyprop;
char *keyval;
char *valprop;
int sepchar;
{
char *propval = NULL;
int i;
int j, alen, l;
void *ni = NULL;
void *lastni = NULL;
ni_status nis;
ni_id nid;
ni_namelist ninl;
register char *p;
char keybuf[1024];
/*
** Create the full key from the two parts.
**
** Note that directory can end with, e.g., "name=" to specify
** an alternate search property.
*/
i = strlen(keydir) + strlen(keyval) + 2;
if (keyprop != NULL)
i += strlen(keyprop) + 1;
if (i >= sizeof keybuf)
return NULL;
(void) sm_strlcpyn(keybuf, sizeof keybuf, 2, keydir, "/");
if (keyprop != NULL)
{
(void) sm_strlcat2(keybuf, keyprop, "=", sizeof keybuf);
}
(void) sm_strlcat(keybuf, keyval, sizeof keybuf);
#if 0
if (tTd(38, 21))
sm_dprintf("ni_propval(%s, %s, %s, %s, %d) keybuf='%s'\n",
keydir, keyprop, keyval, valprop, sepchar, keybuf);
#endif /* 0 */
/*
** If the passed directory and property name are found
** in one of netinfo domains we need to search (starting
** from the local domain moving all the way back to the
** root domain) set propval to the property's value
** and return it.
*/
for (i = 0; i < MAX_NI_LEVELS && propval == NULL; i++)
{
if (i == 0)
{
nis = ni_open(NULL, LOCAL_NETINFO_DOMAIN, &ni);
#if 0
if (tTd(38, 20))
sm_dprintf("ni_open(LOCAL) = %d\n", nis);
#endif /* 0 */
}
else
{
if (lastni != NULL)
ni_free(lastni);
lastni = ni;
nis = ni_open(lastni, PARENT_NETINFO_DOMAIN, &ni);
#if 0
if (tTd(38, 20))
sm_dprintf("ni_open(PARENT) = %d\n", nis);
#endif /* 0 */
}
/*
** Don't bother if we didn't get a handle on a
** proper domain. This is not necessarily an error.
** We would get a positive ni_status if, for instance
** we never found the directory or property and tried
** to open the parent of the root domain!
*/
if (nis != 0)
break;
/*
** Find the path to the server information.
*/
if (ni_pathsearch(ni, &nid, keybuf) != 0)
continue;
/*
** Find associated value information.
*/
if (ni_lookupprop(ni, &nid, valprop, &ninl) != 0)
continue;
#if 0
if (tTd(38, 20))
sm_dprintf("ni_lookupprop: len=%d\n",
ninl.ni_namelist_len);
#endif /* 0 */
/*
** See if we have an acceptable number of values.
*/
if (ninl.ni_namelist_len <= 0)
continue;
if (sepchar == '\0' && ninl.ni_namelist_len > 1)
{
ni_namelist_free(&ninl);
continue;
}
/*
** Calculate number of bytes needed and build result
*/
alen = 1;
for (j = 0; j < ninl.ni_namelist_len; j++)
alen += strlen(ninl.ni_namelist_val[j]) + 1;
propval = p = sm_malloc(alen);
if (propval == NULL)
goto cleanup;
for (j = 0; j < ninl.ni_namelist_len; j++)
{
(void) sm_strlcpy(p, ninl.ni_namelist_val[j], alen);
l = strlen(p);
p += l;
*p++ = sepchar;
alen -= l + 1;
}
*--p = '\0';
ni_namelist_free(&ninl);
}
cleanup:
if (ni != NULL)
ni_free(ni);
if (lastni != NULL && ni != lastni)
ni_free(lastni);
#if 0
if (tTd(38, 20))
sm_dprintf("ni_propval returns: '%s'\n", propval);
#endif /* 0 */
return propval;
}
#endif /* NETINFO */
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