/** \brief Return the file-path of the key file related
* to the identified shared memory
*
* \b os_posix_findKeyFile tries to find the key file related to \b name
* in the \b /tmp directory. The key files are prefixed with \b
* /tmp/spddskey_.
*
* \b os_posix_findKeyFile first opens the directory \b /tmp by calling
* \b opendir. Then it reads all entries in serach for any entry
* that starts with the name \b spddskey_ by reading the entry with
* \b readdir. If the a matching entry is found, it calls os_posix_matchKeyFile
* to check if the key file matches the identified \b name. If the
* \b name matches the contents, the entry is found, and the path
* is returned to the caller. The memory for the path is allocated
* from heap and is expected to be freed by the caller.
*
* If no matching entry is found, NULL is returned to the caller.
*/
static char *
os_posix_findKeyFile (
const char *name)
{
DIR *key_dir;
struct dirent *entry;
char key_file_name [sizeof(os_posix_key_file_prefix)+1];
char *kfn = NULL;
key_dir = opendir ("/tmp");
if (key_dir) {
entry = readdir (key_dir);
while (entry != NULL) {
if (strncmp (entry->d_name, "spddskey_", 9) == 0) {
snprintf (key_file_name, sizeof(os_posix_key_file_prefix)+1, "/tmp/%s", entry->d_name);
if (os_posix_matchKeyFile (key_file_name, name)) {
kfn = os_malloc (strlen (key_file_name) + 1);
if (kfn != NULL) {
os_strcpy (kfn, key_file_name);
}
entry = NULL;
} else {
entry = readdir (key_dir);
}
} else {
entry = readdir (key_dir);
}
}
closedir (key_dir);
}
return kfn;
}
/** \brief Return the file-path of the key file related
* to the identified shared memory
*
* \b os_posix_findKeyFile tries to find the key file related to \b name
* in the \b temporary directory. The key files are prefixed with \b
* /<temporary directory>/spddskey_.
*
* \b os_posix_findKeyFile first opens the directory \b temporary directory by
* calling \b opendir. Then it reads all entries in serach for any entry
* that starts with the name \b spddskey_ by reading the entry with
* \b readdir. If the a matching entry is found, it calls os_posix_matchKeyFile
* to check if the key file matches the identified \b name. If the
* \b name matches the contents, the entry is found, and the path
* is returned to the caller. The memory for the path is allocated
* from heap and is expected to be freed by the caller.
*
* If no matching entry is found, NULL is returned to the caller.
*/
static char *
os_posix_findKeyFile(
const char *name)
{
DIR *key_dir;
struct dirent *entry;
char *kfn = NULL;
char * dir_name = NULL;
char * key_file_name = NULL;
int key_file_name_size;
dir_name = os_getTempDir();
key_dir = opendir(dir_name);
if (key_dir) {
entry = readdir(key_dir);
while (entry != NULL) {
if (strncmp(entry->d_name, "spddskey_", 9) == 0) {
key_file_name_size = strlen(dir_name) + strlen(os_posix_key_file_format) + 2;
key_file_name = os_malloc (key_file_name_size);
snprintf(key_file_name,
key_file_name_size,
"%s/%s",
dir_name,
entry->d_name);
if (os_posix_matchKeyFile(key_file_name, name)) {
kfn = os_malloc(strlen(key_file_name) + 1);
if (kfn != NULL) {
os_strcpy(kfn, key_file_name);
}
entry = NULL;
} else {
entry = readdir(key_dir);
}
os_free (key_file_name);
} else {
entry = readdir(key_dir);
}
}
closedir(key_dir);
}
return kfn;
}
