#include <fcntl.h>
#include <unistd.h>
+/*
+ * This compatibility layer shares a common "base" that is implemented
+ * in terms of an internal API. This file contains two implementations
+ * of the internal API below.
+ */
static
int lttng_directory_handle_stat(const struct lttng_directory_handle *handle,
const char *path, struct stat *st);
int _run_as_mkdir_recursive(const struct lttng_directory_handle *handle,
const char *path, mode_t mode, uid_t uid, gid_t gid);
static
+int lttng_directory_handle_open(const struct lttng_directory_handle *handle,
+ const char *filename, int flags, mode_t mode);
+static
+int _run_as_open(const struct lttng_directory_handle *handle,
+ const char *filename,
+ int flags, mode_t mode, uid_t uid, gid_t gid);
+static
+int lttng_directory_handle_unlink(
+ const struct lttng_directory_handle *handle,
+ const char *filename);
+static
+int _run_as_unlink(const struct lttng_directory_handle *handle,
+ const char *filename, uid_t uid, gid_t gid);
+static
void lttng_directory_handle_invalidate(struct lttng_directory_handle *handle);
#ifdef COMPAT_DIRFD
}
static
-int _run_as_mkdir(const struct lttng_directory_handle *handle, const char *path,
- mode_t mode, uid_t uid, gid_t gid)
+int lttng_directory_handle_open(const struct lttng_directory_handle *handle,
+ const char *filename, int flags, mode_t mode)
+{
+ return openat(handle->dirfd, filename, flags, mode);
+}
+
+static
+int _run_as_open(const struct lttng_directory_handle *handle,
+ const char *filename,
+ int flags, mode_t mode, uid_t uid, gid_t gid)
+{
+ return run_as_openat(handle->dirfd, filename, flags, mode, uid, gid);
+}
+
+static
+int _run_as_unlink(const struct lttng_directory_handle *handle,
+ const char *filename, uid_t uid, gid_t gid)
+{
+ return run_as_unlinkat(handle->dirfd, filename, uid, gid);
+}
+
+static
+int lttng_directory_handle_unlink(
+ const struct lttng_directory_handle *handle,
+ const char *filename)
+{
+ return unlinkat(handle->dirfd, filename, 0);
+}
+
+static
+int _run_as_mkdir(const struct lttng_directory_handle *handle,
+ const char *path, mode_t mode, uid_t uid, gid_t gid)
{
return run_as_mkdirat(handle->dirfd, path, mode, uid, gid);
}
return ret;
}
+static
+int lttng_directory_handle_open(const struct lttng_directory_handle *handle,
+ const char *filename, int flags, mode_t mode)
+{
+ int ret;
+ char fullpath[LTTNG_PATH_MAX];
+
+ ret = get_full_path(handle, filename, fullpath, sizeof(fullpath));
+ if (ret) {
+ errno = ENOMEM;
+ goto end;
+ }
+
+ ret = open(fullpath, flags, mode);
+end:
+ return ret;
+}
+
+static
+int lttng_directory_handle_unlink(
+ const struct lttng_directory_handle *handle,
+ const char *filename)
+{
+ int ret;
+ char fullpath[LTTNG_PATH_MAX];
+
+ ret = get_full_path(handle, filename, fullpath, sizeof(fullpath));
+ if (ret) {
+ errno = ENOMEM;
+ goto end;
+ }
+
+ ret = unlink(fullpath);
+end:
+ return ret;
+}
+
static
int _run_as_mkdir(const struct lttng_directory_handle *handle, const char *path,
mode_t mode, uid_t uid, gid_t gid)
return ret;
}
+static
+int _run_as_open(const struct lttng_directory_handle *handle,
+ const char *filename,
+ int flags, mode_t mode, uid_t uid, gid_t gid)
+{
+ int ret;
+ char fullpath[LTTNG_PATH_MAX];
+
+ ret = get_full_path(handle, filename, fullpath, sizeof(fullpath));
+ if (ret) {
+ errno = ENOMEM;
+ goto end;
+ }
+
+ ret = run_as_open(fullpath, flags, mode, uid, gid);
+end:
+ return ret;
+}
+
+static
+int _run_as_unlink(const struct lttng_directory_handle *handle,
+ const char *filename, uid_t uid, gid_t gid)
+{
+ int ret;
+ char fullpath[LTTNG_PATH_MAX];
+
+ ret = get_full_path(handle, filename, fullpath, sizeof(fullpath));
+ if (ret) {
+ errno = ENOMEM;
+ goto end;
+ }
+
+ ret = run_as_unlink(fullpath, uid, gid);
+end:
+ return ret;
+}
+
static
int _run_as_mkdir_recursive(const struct lttng_directory_handle *handle,
const char *path, mode_t mode, uid_t uid, gid_t gid)
return lttng_directory_handle_create_subdirectory_recursive_as_user(
handle, subdirectory_path, mode, NULL);
}
+
+LTTNG_HIDDEN
+int lttng_directory_handle_open_file_as_user(
+ const struct lttng_directory_handle *handle,
+ const char *filename,
+ int flags, mode_t mode,
+ const struct lttng_credentials *creds)
+{
+ int ret;
+
+ if (!creds) {
+ /* Run as current user. */
+ ret = lttng_directory_handle_open(handle, filename, flags,
+ mode);
+ } else {
+ ret = _run_as_open(handle, filename, flags, mode,
+ creds->uid, creds->gid);
+ }
+ return ret;
+}
+
+LTTNG_HIDDEN
+int lttng_directory_handle_open_file(
+ const struct lttng_directory_handle *handle,
+ const char *filename,
+ int flags, mode_t mode)
+{
+ return lttng_directory_handle_open_file_as_user(handle, filename, flags,
+ mode, NULL);
+}
+
+LTTNG_HIDDEN
+int lttng_directory_handle_unlink_file_as_user(
+ const struct lttng_directory_handle *handle,
+ const char *filename,
+ const struct lttng_credentials *creds)
+{
+ int ret;
+
+ if (!creds) {
+ /* Run as current user. */
+ ret = lttng_directory_handle_unlink(handle, filename);
+ } else {
+ ret = _run_as_unlink(handle, filename, creds->uid, creds->gid);
+ }
+ return ret;
+}
+
+LTTNG_HIDDEN
+int lttng_directory_handle_unlink_file(
+ const struct lttng_directory_handle *handle,
+ const char *filename)
+{
+ return lttng_directory_handle_unlink_file_as_user(handle,
+ filename, NULL);
+}