int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
{
struct dirent entry, *result;
struct os_dirent_node *head, *node, *next;
struct stat buf;
DIR *dir;
int ret;
char *fname;
int len;
*headp = NULL;
dir = opendir(dirname);
if (!dir)
return -1;
/* Create a buffer for the maximum filename length */
len = sizeof(entry.d_name) + strlen(dirname) + 2;
fname = malloc(len);
if (!fname) {
ret = -ENOMEM;
goto done;
}
for (node = head = NULL;; node = next) {
ret = readdir_r(dir, &entry, &result);
if (ret || !result)
break;
next = malloc(sizeof(*node) + strlen(entry.d_name) + 1);
if (!next) {
os_dirent_free(head);
ret = -ENOMEM;
goto done;
}
strcpy(next->name, entry.d_name);
switch (entry.d_type) {
case DT_REG:
next->type = OS_FILET_REG;
break;
case DT_DIR:
next->type = OS_FILET_DIR;
break;
case DT_LNK:
next->type = OS_FILET_LNK;
break;
}
next->size = 0;
snprintf(fname, len, "%s/%s", dirname, next->name);
if (!stat(fname, &buf))
next->size = buf.st_size;
if (node)
node->next = next;
if (!head)
head = node;
}
*headp = head;
done:
closedir(dir);
return ret;
}
int sandbox_fs_ls(const char *dirname)
{
struct os_dirent_node *head, *node;
int ret;
ret = os_dirent_ls(dirname, &head);
if (ret)
goto out;
for (node = head; node; node = node->next) {
printf("%s %10lu %s\n", os_dirent_get_typename(node->type),
node->size, node->name);
}
out:
os_dirent_free(head);
return ret;
}
int os_dirent_ls(const char *dirname, struct os_dirent_node **headp)
{
struct dirent *entry;
struct os_dirent_node *head, *node, *next;
struct stat buf;
DIR *dir;
int ret;
char *fname;
char *old_fname;
int len;
int dirlen;
*headp = NULL;
dir = opendir(dirname);
if (!dir)
return -1;
/* Create a buffer upfront, with typically sufficient size */
dirlen = strlen(dirname) + 2;
len = dirlen + 256;
fname = malloc(len);
if (!fname) {
ret = -ENOMEM;
goto done;
}
for (node = head = NULL;; node = next) {
errno = 0;
entry = readdir(dir);
if (!entry) {
ret = errno;
break;
}
next = malloc(sizeof(*node) + strlen(entry->d_name) + 1);
if (!next) {
os_dirent_free(head);
ret = -ENOMEM;
goto done;
}
if (dirlen + strlen(entry->d_name) > len) {
len = dirlen + strlen(entry->d_name);
old_fname = fname;
fname = realloc(fname, len);
if (!fname) {
free(old_fname);
free(next);
os_dirent_free(head);
ret = -ENOMEM;
goto done;
}
}
next->next = NULL;
strcpy(next->name, entry->d_name);
switch (entry->d_type) {
case DT_REG:
next->type = OS_FILET_REG;
break;
case DT_DIR:
next->type = OS_FILET_DIR;
break;
case DT_LNK:
next->type = OS_FILET_LNK;
break;
default:
next->type = OS_FILET_UNKNOWN;
}
next->size = 0;
snprintf(fname, len, "%s/%s", dirname, next->name);
if (!stat(fname, &buf))
next->size = buf.st_size;
if (node)
node->next = next;
else
head = next;
}
*headp = head;
done:
closedir(dir);
free(fname);
return ret;
}
