From 464df1d5e5ab1322e2dd0a7796939fff1aeefa9a Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:49:25 +0200 Subject: Adding upstream version 1.47.0. Signed-off-by: Daniel Baumann --- lib/support/profile_helpers.c | 317 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 317 insertions(+) create mode 100644 lib/support/profile_helpers.c (limited to 'lib/support/profile_helpers.c') diff --git a/lib/support/profile_helpers.c b/lib/support/profile_helpers.c new file mode 100644 index 0000000..d7d6f15 --- /dev/null +++ b/lib/support/profile_helpers.c @@ -0,0 +1,317 @@ +/* + * profile_helpers.c -- Helper functions for the profile library + * + * These functions are not part of the "core" profile library, and do + * not require access to the internal functions and data structures of + * the profile library. They are mainly convenience functions for + * programs that want to do something unusual such as obtaining the + * list of sections or relations, or accessing multiple values from a + * relation that is listed more than once. This functionality can all + * be done using the profile_iterator abstraction, but it is less + * convenient. + * + * Copyright (C) 2006 by Theodore Ts'o. + * + * %Begin-Header% + * This file may be redistributed under the terms of the GNU Public + * License. + * %End-Header% + */ + +#include "config.h" +#include +#include +#include + +#include +#include "profile.h" +#include "profile_helpers.h" +#include "prof_err.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, char *str) +{ + char **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; + } + + list->list[list->num++] = str; + 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 profile_free_list(char **list) +{ + char **cp; + + if (list == 0) + return; + + for (cp = list; *cp; cp++) + free(*cp); + free(list); +} + +errcode_t +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_iterator_create(profile, names, + PROFILE_ITER_RELATIONS_ONLY, + &state))) + return retval; + + if ((retval = init_list(&values))) + goto cleanup_iterator; + + do { + if ((retval = profile_iterator(&state, 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); +cleanup_iterator: + profile_iterator_free(&state); + return retval; +} + +/* + * This function will return the list of the names of subsections in the + * under the specified section name. + */ +errcode_t +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_iterator_create(profile, names, + PROFILE_ITER_LIST_SECTION | PROFILE_ITER_SECTIONS_ONLY, + &state))) + return retval; + + if ((retval = init_list(&values))) + goto cleanup_iterator; + + do { + if ((retval = profile_iterator(&state, &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); +cleanup_iterator: + profile_iterator_free(&state); + return retval; +} + +/* + * This function will return the list of the names of relations in the + * under the specified section name. + */ +errcode_t +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_iterator_create(profile, names, + PROFILE_ITER_LIST_SECTION | PROFILE_ITER_RELATIONS_ONLY, + &state))) + return retval; + + if ((retval = init_list(&values))) + goto cleanup_iterator; + + do { + if ((retval = profile_iterator(&state, &name, 0))) + goto cleanup; + if (name) { + if (is_list_member(&values, name)) + free(name); + else + add_to_list(&values, name); + } + } while (state); + + end_list(&values, ret_names); + return 0; + +cleanup: + end_list(&values, 0); +cleanup_iterator: + profile_iterator_free(&state); + return retval; +} + + +void +profile_release_string(char *str) +{ + free(str); +} + +errcode_t +profile_init_path(const char * filepath, + profile_t *ret_profile) +{ + int n_entries, i; + unsigned int ent_len; + const char *s, *t; + char **filenames; + errcode_t retval; + + /* count the distinct filename components */ + for(s = filepath, n_entries = 1; *s; s++) { + if (*s == ':') + n_entries++; + } + + /* the array is NULL terminated */ + filenames = (char **) malloc((n_entries+1) * sizeof(char*)); + if (filenames == 0) + return ENOMEM; + + /* measure, copy, and skip each one */ + for(s = filepath, i=0; (t = strchr(s, ':')) || (t=s+strlen(s)); s=t+1, i++) { + ent_len = t-s; + filenames[i] = (char*) malloc(ent_len + 1); + if (filenames[i] == 0) { + /* if malloc fails, free the ones that worked */ + while(--i >= 0) free(filenames[i]); + free(filenames); + return ENOMEM; + } + strncpy(filenames[i], s, ent_len); + filenames[i][ent_len] = 0; + if (*t == 0) { + i++; + break; + } + } + /* cap the array */ + filenames[i] = 0; + + retval = profile_init((const char * const *) filenames, + ret_profile); + + /* count back down and free the entries */ + while(--i >= 0) free(filenames[i]); + free(filenames); + + return retval; +} -- cgit v1.2.3