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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <string.h>
#include <stdlib.h>
#include <bsm/devices.h>
#include <bsm/devalloc.h>
char *strtok_r(char *, const char *, char **);
/* externs from getdaent.c */
extern char *trim_white(char *);
extern int pack_white(char *);
extern char *getdadmfield(char *, char *);
extern int getdadmline(char *, int, FILE *);
extern char *_strdup_null(char *);
static struct _dadefbuff {
FILE *_dadeff;
/* pointer into /etc/security/tsol/devalloc_defaults */
da_defs_t _interpdadefs;
char _interpdadefline[DA_BUFSIZE + 1];
char *_DADEFS;
} *__dadefbuff;
#define dadeff (_df->_dadeff)
#define interpdadefs (_df->_interpdadefs)
#define interpdadefline (_df->_interpdadefline)
#define DADEFS_FILE (_df->_DADEFS)
static da_defs_t *dadef_interpret(char *);
int dadef_matchtype(da_defs_t *, char *);
/*
* _dadefalloc -
* allocates common buffers and structures.
* returns pointer to the new structure, else returns NULL on error.
*/
static struct _dadefbuff *
_dadefalloc(void)
{
struct _dadefbuff *_df = __dadefbuff;
if (_df == NULL) {
_df = (struct _dadefbuff *)calloc((unsigned)1,
(unsigned)sizeof (*__dadefbuff));
if (_df == NULL)
return (NULL);
DADEFS_FILE = "/etc/security/tsol/devalloc_defaults";
__dadefbuff = _df;
}
return (__dadefbuff);
}
/*
* setdadefent -
* rewinds devalloc_defaults file to the begining.
*/
void
setdadefent(void)
{
struct _dadefbuff *_df = _dadefalloc();
if (_df == NULL)
return;
if (dadeff == NULL)
dadeff = fopen(DADEFS_FILE, "rF");
else
rewind(dadeff);
}
/*
* enddadefent -
* closes devalloc_defaults file.
*/
void
enddadefent(void)
{
struct _dadefbuff *_df = _dadefalloc();
if (_df == NULL)
return;
if (dadeff != NULL) {
(void) fclose(dadeff);
dadeff = NULL;
}
}
void
freedadefent(da_defs_t *da_def)
{
if (da_def == NULL)
return;
_kva_free(da_def->devopts);
da_def->devopts = NULL;
}
/*
* getdadefent -
* When first called, returns a pointer to the first da_defs_t
* structure in devalloc_defaults; thereafter, it returns a pointer to the
* next da_defs_t structure in the file. Thus, successive calls can be
* used to search the entire file.
* call to getdadefent should be bracketed by setdadefent and enddadefent.
* returns NULL on error.
*/
da_defs_t *
getdadefent(void)
{
char line1[DA_BUFSIZE + 1];
da_defs_t *da_def;
struct _dadefbuff *_df = _dadefalloc();
if ((_df == 0) || (dadeff == NULL))
return (NULL);
while (getdadmline(line1, (int)sizeof (line1), dadeff) != 0) {
if ((da_def = dadef_interpret(line1)) == NULL)
continue;
return (da_def);
}
return (NULL);
}
/*
* getdadeftype -
* searches from the beginning of devalloc_defaults for the device
* specified by its type.
* call to getdadeftype should be bracketed by setdadefent and enddadefent.
* returns pointer to da_defs_t for the device if it is found, else
* returns NULL if device not found or in case of error.
*/
da_defs_t *
getdadeftype(char *type)
{
char line1[DA_BUFSIZE + 1];
da_defs_t *da_def;
struct _dadefbuff *_df = _dadefalloc();
if ((type == NULL) || (_df == NULL) || (dadeff == NULL))
return (NULL);
while (getdadmline(line1, (int)sizeof (line1), dadeff) != 0) {
if (strstr(line1, type) == NULL)
continue;
if ((da_def = dadef_interpret(line1)) == NULL)
continue;
if (dadef_matchtype(da_def, type))
return (da_def);
freedadefent(da_def);
}
return (NULL);
}
/*
* dadef_matchtype -
* checks if the specified da_defs_t is for the device type specified.
* returns 1 if match found, else, returns 0.
*/
int
dadef_matchtype(da_defs_t *da_def, char *type)
{
if (da_def->devtype == NULL)
return (0);
return ((strcmp(da_def->devtype, type) == 0));
}
/*
* dadef_interpret -
* parses val and initializes pointers in da_defs_t.
* returns pointer to parsed da_defs_t entry, else returns NULL on error.
*/
static da_defs_t *
dadef_interpret(char *val)
{
struct _dadefbuff *_df = _dadefalloc();
int i;
char *opts;
kva_t *kvap;
kv_t *kvp;
if (_df == NULL)
return (NULL);
(void) strcpy(interpdadefline, val);
interpdadefs.devtype = getdadmfield(interpdadefline, KV_TOKEN_DELIMIT);
opts = getdadmfield(NULL, KV_TOKEN_DELIMIT);
interpdadefs.devopts = NULL;
if (interpdadefs.devtype == NULL)
return (NULL);
if (opts != NULL)
interpdadefs.devopts =
_str2kva(opts, KV_ASSIGN, KV_DELIMITER);
/* remove any extraneous whitespace in the options */
if ((kvap = interpdadefs.devopts) != NULL) {
for (i = 0, kvp = kvap->data; i < kvap->length; i++, kvp++) {
(void) pack_white(kvp->key);
(void) pack_white(kvp->value);
}
}
return (&interpdadefs);
}
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