prof_get.c revision 159d09a20817016f09b3ea28d1bdada4a336bb91
/*
* prof_get.c --- routines that expose the public interfaces for
* querying items from the profile.
*
*/
#include "prof_int.h"
#include <stdio.h>
#include <string.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <errno.h>
#include <limits.h>
/*
* These functions --- init_list(), end_list(), and add_to_list() are
* internal functions used to build up a null-terminated char ** list
* of strings to be returned by functions like profile_get_values.
*
* The profile_string_list structure is used for internal booking
* purposes to build up the list, which is returned in *ret_list by
* the end_list() function.
*
* The publicly exported interface for freeing char** list is
* profile_free_list().
*/
struct profile_string_list {
char **list;
int num;
int max;
};
/*
* Initialize the string list abstraction.
*/
static errcode_t init_list(struct profile_string_list *list)
{
list->num = 0;
list->max = 10;
list->list = malloc(list->max * sizeof(char *));
if (list->list == 0)
return ENOMEM;
list->list[0] = 0;
return 0;
}
/*
* Free any memory left over in the string abstraction, returning the
* built up list in *ret_list if it is non-null.
*/
static void end_list(struct profile_string_list *list, char ***ret_list)
{
char **cp;
if (list == 0)
return;
if (ret_list) {
*ret_list = list->list;
return;
} else {
for (cp = list->list; *cp; cp++)
free(*cp);
free(list->list);
}
list->num = list->max = 0;
list->list = 0;
}
/*
* Add a string to the list.
*/
static errcode_t add_to_list(struct profile_string_list *list, const char *str)
{
char *newstr, **newlist;
int newmax;
if (list->num+1 >= list->max) {
newmax = list->max + 10;
newlist = realloc(list->list, newmax * sizeof(char *));
if (newlist == 0)
return ENOMEM;
list->max = newmax;
list->list = newlist;
}
newstr = malloc(strlen(str)+1);
if (newstr == 0)
return ENOMEM;
strcpy(newstr, str);
list->list[list->num++] = newstr;
list->list[list->num] = 0;
return 0;
}
/*
* Return TRUE if the string is already a member of the list.
*/
static int is_list_member(struct profile_string_list *list, const char *str)
{
char **cpp;
if (!list->list)
return 0;
for (cpp = list->list; *cpp; cpp++) {
if (!strcmp(*cpp, str))
return 1;
}
return 0;
}
/*
* This function frees a null-terminated list as returned by
* profile_get_values.
*/
void KRB5_CALLCONV profile_free_list(char **list)
{
char **cp;
if (list == 0)
return;
for (cp = list; *cp; cp++)
free(*cp);
free(list);
}
errcode_t KRB5_CALLCONV
profile_get_values(profile_t profile, const char *const *names,
char ***ret_values)
{
errcode_t retval;
void *state;
char *value;
struct profile_string_list values;
if ((retval = profile_node_iterator_create(profile, names,
PROFILE_ITER_RELATIONS_ONLY,
&state)))
return retval;
if ((retval = init_list(&values)))
return retval;
do {
if ((retval = profile_node_iterator(&state, 0, 0, &value)))
goto cleanup;
if (value)
add_to_list(&values, value);
} while (state);
if (values.num == 0) {
retval = PROF_NO_RELATION;
goto cleanup;
}
end_list(&values, ret_values);
return 0;
cleanup:
end_list(&values, 0);
return retval;
}
/*
* This function only gets the first value from the file; it is a
* helper function for profile_get_string, profile_get_integer, etc.
*/
errcode_t profile_get_value(profile_t profile, const char **names,
const char **ret_value)
{
errcode_t retval;
void *state;
char *value;
if ((retval = profile_node_iterator_create(profile, names,
PROFILE_ITER_RELATIONS_ONLY,
&state)))
return retval;
if ((retval = profile_node_iterator(&state, 0, 0, &value)))
goto cleanup;
if (value)
*ret_value = value;
else
retval = PROF_NO_RELATION;
cleanup:
profile_node_iterator_free(&state);
return retval;
}
errcode_t KRB5_CALLCONV
profile_get_string(profile_t profile, const char *name, const char *subname,
const char *subsubname, const char *def_val,
char **ret_string)
{
const char *value;
errcode_t retval;
const char *names[4];
if (profile) {
names[0] = name;
names[1] = subname;
names[2] = subsubname;
names[3] = 0;
retval = profile_get_value(profile, names, &value);
if (retval == PROF_NO_SECTION || retval == PROF_NO_RELATION)
value = def_val;
else if (retval)
return retval;
} else
value = def_val;
if (value) {
*ret_string = malloc(strlen(value)+1);
if (*ret_string == 0)
return ENOMEM;
strcpy(*ret_string, value);
} else
*ret_string = 0;
return 0;
}
errcode_t KRB5_CALLCONV
profile_get_integer(profile_t profile, const char *name, const char *subname,
const char *subsubname, int def_val, int *ret_int)
{
const char *value;
errcode_t retval;
const char *names[4];
char *end_value;
long ret_long;
*ret_int = def_val;
if (profile == 0)
return 0;
names[0] = name;
names[1] = subname;
names[2] = subsubname;
names[3] = 0;
retval = profile_get_value(profile, names, &value);
if (retval == PROF_NO_SECTION || retval == PROF_NO_RELATION) {
*ret_int = def_val;
return 0;
} else if (retval)
return retval;
if (value[0] == 0)
/* Empty string is no good. */
return PROF_BAD_INTEGER;
errno = 0;
ret_long = strtol (value, &end_value, 10);
/* Overflow or underflow. */
if ((ret_long == LONG_MIN || ret_long == LONG_MAX) && errno != 0)
return PROF_BAD_INTEGER;
/* Value outside "int" range. */
if ((long) (int) ret_long != ret_long)
return PROF_BAD_INTEGER;
/* Garbage in string. */
if (end_value != value + strlen (value))
return PROF_BAD_INTEGER;
*ret_int = ret_long;
return 0;
}
static const char *const conf_yes[] = {
"y", "yes", "true", "t", "1", "on",
0,
};
static const char *const conf_no[] = {
"n", "no", "false", "nil", "0", "off",
0,
};
static errcode_t
profile_parse_boolean(const char *s, int *ret_boolean)
{
const char *const *p;
if (ret_boolean == NULL)
return PROF_EINVAL;
for(p=conf_yes; *p; p++) {
if (!strcasecmp(*p,s)) {
*ret_boolean = 1;
return 0;
}
}
for(p=conf_no; *p; p++) {
if (!strcasecmp(*p,s)) {
*ret_boolean = 0;
return 0;
}
}
return PROF_BAD_BOOLEAN;
}
errcode_t KRB5_CALLCONV
profile_get_boolean(profile_t profile, const char *name, const char *subname,
const char *subsubname, int def_val, int *ret_boolean)
{
const char *value;
errcode_t retval;
const char *names[4];
if (profile == 0) {
*ret_boolean = def_val;
return 0;
}
names[0] = name;
names[1] = subname;
names[2] = subsubname;
names[3] = 0;
retval = profile_get_value(profile, names, &value);
if (retval == PROF_NO_SECTION || retval == PROF_NO_RELATION) {
*ret_boolean = def_val;
return 0;
} else if (retval)
return retval;
return profile_parse_boolean (value, ret_boolean);
}
/*
* This function will return the list of the names of subections in the
* under the specified section name.
*/
errcode_t KRB5_CALLCONV
profile_get_subsection_names(profile_t profile, const char **names,
char ***ret_names)
{
errcode_t retval;
void *state;
char *name;
struct profile_string_list values;
if ((retval = profile_node_iterator_create(profile, names,
PROFILE_ITER_LIST_SECTION | PROFILE_ITER_SECTIONS_ONLY,
&state)))
return retval;
if ((retval = init_list(&values)))
return retval;
do {
if ((retval = profile_node_iterator(&state, 0, &name, 0)))
goto cleanup;
if (name)
add_to_list(&values, name);
} while (state);
end_list(&values, ret_names);
return 0;
cleanup:
end_list(&values, 0);
return retval;
}
/*
* This function will return the list of the names of relations in the
* under the specified section name.
*/
errcode_t KRB5_CALLCONV
profile_get_relation_names(profile_t profile, const char **names,
char ***ret_names)
{
errcode_t retval;
void *state;
char *name;
struct profile_string_list values;
if ((retval = profile_node_iterator_create(profile, names,
PROFILE_ITER_LIST_SECTION | PROFILE_ITER_RELATIONS_ONLY,
&state)))
return retval;
if ((retval = init_list(&values)))
return retval;
do {
if ((retval = profile_node_iterator(&state, 0, &name, 0)))
goto cleanup;
if (name && !is_list_member(&values, name))
add_to_list(&values, name);
} while (state);
end_list(&values, ret_names);
return 0;
cleanup:
end_list(&values, 0);
return retval;
}
errcode_t KRB5_CALLCONV
profile_iterator_create(profile_t profile, const char *const *names, int flags,
void **ret_iter)
{
return profile_node_iterator_create(profile, names, flags, ret_iter);
}
void KRB5_CALLCONV
profile_iterator_free(void **iter_p)
{
profile_node_iterator_free(iter_p);
}
errcode_t KRB5_CALLCONV
profile_iterator(void **iter_p, char **ret_name, char **ret_value)
{
char *name, *value;
errcode_t retval;
retval = profile_node_iterator(iter_p, 0, &name, &value);
if (retval)
return retval;
if (ret_name) {
if (name) {
*ret_name = malloc(strlen(name)+1);
if (!*ret_name)
return ENOMEM;
strcpy(*ret_name, name);
} else
*ret_name = 0;
}
if (ret_value) {
if (value) {
*ret_value = malloc(strlen(value)+1);
if (!*ret_value) {
if (ret_name) {
free(*ret_name);
*ret_name = 0;
}
return ENOMEM;
}
strcpy(*ret_value, value);
} else
*ret_value = 0;
}
return 0;
}
void KRB5_CALLCONV
profile_release_string(char *str)
{
free(str);
}