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file: add remove operation

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Signed-off-by: Jo-Philipp Wich <jo@mein.io>
This commit is contained in:
Jo-Philipp Wich 2019-09-03 08:18:39 +02:00
parent 604db20aa6
commit 345363bf47
1 changed files with 88 additions and 6 deletions
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82
file.c
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@ -577,6 +577,87 @@ rpc_file_stat(struct ubus_context *ctx, struct ubus_object *obj,
return 0;
}
static int
rpc_file_remove_recursive(const char *path);
static int
rpc_file_remove_recursive(const char *path)
{
DIR *fd;
int err = 0;
struct stat s;
struct dirent *e;
char *entrypath;
if ((fd = opendir(path)) == NULL)
return rpc_errno_status();
for (e = readdir(fd); e != NULL && err == 0; e = readdir(fd))
{
if (!strcmp(e->d_name, ".") || !strcmp(e->d_name, ".."))
continue;
if (asprintf(&entrypath, "%s/%s", path, e->d_name) >= 0)
{
if (!lstat(entrypath, &s))
{
if (S_ISDIR(s.st_mode))
err = rpc_file_remove_recursive(entrypath);
else if (unlink(entrypath))
err = rpc_errno_status();
}
free(entrypath);
}
else
{
err = UBUS_STATUS_UNKNOWN_ERROR;
}
}
closedir(fd);
if (!err && rmdir(path))
return rpc_errno_status();
return err;
}
static int
rpc_file_remove(struct ubus_context *ctx, struct ubus_object *obj,
struct ubus_request_data *req, const char *method,
struct blob_attr *msg)
{
struct stat s;
struct blob_attr *tb[__RPC_F_R_MAX];
char *path = NULL;
blobmsg_parse(rpc_file_r_policy, __RPC_F_R_MAX, tb,
blob_data(msg), blob_len(msg));
if (!tb[RPC_F_RW_PATH])
return UBUS_STATUS_INVALID_ARGUMENT;
path = rpc_canonicalize_path(blobmsg_get_string(tb[RPC_F_RW_PATH]));
if (path == NULL)
return UBUS_STATUS_UNKNOWN_ERROR;
if (!rpc_file_write_access(tb[RPC_F_R_SESSION], path))
return UBUS_STATUS_PERMISSION_DENIED;
if (lstat(path, &s))
return rpc_errno_status();
if (S_ISDIR(s.st_mode))
return rpc_file_remove_recursive(path);
if (unlink(path))
return rpc_errno_status();
return 0;
}
static const char *
rpc_file_exec_lookup(const char *cmd)
{
@ -906,6 +987,7 @@ rpc_file_api_init(const struct rpc_daemon_ops *o, struct ubus_context *ctx)
UBUS_METHOD("list", rpc_file_list, rpc_file_r_policy),
UBUS_METHOD("stat", rpc_file_stat, rpc_file_r_policy),
UBUS_METHOD("md5", rpc_file_md5, rpc_file_r_policy),
UBUS_METHOD("remove", rpc_file_remove, rpc_file_r_policy),
UBUS_METHOD("exec", rpc_file_exec, rpc_exec_policy),
};