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config_file: Guard against calloc/malloc/realloc failure cases

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This commit is contained in:
Lioncash 2014-09-14 18:20:13 -04:00
parent 05024d529a
commit d4f01cafdf
1 changed files with 69 additions and 14 deletions
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83
conf/config_file.c
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@ -63,22 +63,36 @@ struct config_file
struct include_list *includes;
};
static config_file_t *config_file_new_internal(const char *path,
unsigned depth);
static config_file_t *config_file_new_internal(const char *path, unsigned depth);
void config_file_free(config_file_t *conf);
static char *getaline(FILE *file)
{
char *newline = (char*)malloc(9);
char* newline = (char*)malloc(9);
char* newline_tmp = NULL;
size_t cur_size = 8;
size_t index = 0;
int in = getc(file);
if (!newline)
return NULL;
while (in != EOF && in != '\n')
{
if (index == cur_size)
{
cur_size *= 2;
newline = (char*)realloc(newline, cur_size + 1);
if (newline_tmp)
{
newline = newline_tmp;
}
else
{
free(newline);
return NULL;
}
}
newline[index++] = in;
@ -173,6 +187,10 @@ static void add_include_list(config_file_t *conf, const char *path)
{
struct include_list *head = conf->includes;
struct include_list *node = (struct include_list*)calloc(1, sizeof(*node));
if (!node)
return;
node->path = strdup(path);
if (head)
@ -267,10 +285,19 @@ static char *strip_comment(char *str)
static bool parse_line(config_file_t *conf,
struct config_entry_list *list, char *line)
{
if (!*line)
char* comment = NULL;
char* key = (char*)malloc(9);
char* key_tmp = NULL;
size_t cur_size = 8;
size_t index = 0;
if (!line || !*line)
return false;
char *comment = strip_comment(line);
if (!key)
return false;
comment = strip_comment(line);
/* Starting line with # and include includes config files. */
if ((comment == line) && (conf->include_depth < MAX_INCLUDE_DEPTH))
@ -283,22 +310,30 @@ static bool parse_line(config_file_t *conf,
}
}
else if (conf->include_depth >= MAX_INCLUDE_DEPTH)
{
fprintf(stderr, "!!! #include depth exceeded for config. Might be a cycle.\n");
}
/* Skips to first character. */
while (isspace(*line))
line++;
char *key = (char*)malloc(9);
size_t cur_size = 8;
size_t index = 0;
while (isgraph(*line))
{
if (index == cur_size)
{
cur_size *= 2;
key = (char*)realloc(key, cur_size + 1);
key_tmp = (char*)realloc(key, cur_size + 1);
if (key_tmp)
{
key = key_tmp;
}
else
{
free(key);
return false;
}
}
key[index++] = *line++;
@ -365,7 +400,16 @@ static config_file_t *config_file_new_internal(
{
struct config_entry_list *list = (struct config_entry_list*)
calloc(1, sizeof(*list));
char *line = getaline(file);
char *line = NULL;
if (!list)
{
config_file_free(conf);
fclose(file);
return NULL;
}
line = getaline(file);
if (line)
{
@ -375,6 +419,7 @@ static config_file_t *config_file_new_internal(
conf->tail->next = list;
else
conf->entries = list;
conf->tail = list;
}
@ -410,9 +455,14 @@ config_file_t *config_file_new_from_string(const char *from_string)
{
struct config_entry_list *list = (struct config_entry_list*)
calloc(1, sizeof(*list));
char* line = lines->elems[i].data;
if (!list)
{
config_file_free(conf);
return NULL;
}
if (line)
{
if (parse_line(conf, list, line))
@ -421,6 +471,7 @@ config_file_t *config_file_new_from_string(const char *from_string)
conf->tail->next = list;
else
conf->entries = list;
conf->tail = list;
}
}
@ -703,6 +754,10 @@ void config_set_string(config_file_t *conf, const char *key, const char *val)
struct config_entry_list *elem = (struct config_entry_list*)
calloc(1, sizeof(*elem));
if (!elem)
return;
elem->key = strdup(key);
elem->value = strdup(val);