common: compile libfd-tracker as C++

[lttng-tools.git] / src / common / fd-tracker / utils.c

diff --git a/src/common/fd-tracker/utils.c b/src/common/fd-tracker/utils.c
deleted file mode 100644 (file)
index fc307fe..0000000
--- a/src/common/fd-tracker/utils.c
+++ /dev/null
@@ -1,187 +0,0 @@
-/*
- * Copyright (C) 2018 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#include <common/error.h>
-#include <common/fd-tracker/utils.h>
-#include <common/utils.h>
-#include <lttng/constant.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-static
-int open_pipe_cloexec(void *data, int *fds)
-{
-       return utils_create_pipe_cloexec(fds);
-}
-
-static
-int close_pipe(void *data, int *pipe)
-{
-       utils_close_pipe(pipe);
-       pipe[0] = pipe[1] = -1;
-       return 0;
-}
-
-int fd_tracker_util_close_fd(void *unused, int *fd)
-{
-       return close(*fd);
-}
-
-int fd_tracker_util_pipe_open_cloexec(
-               struct fd_tracker *tracker, const char *name, int *pipe)
-{
-       int ret;
-       const char *name_prefix;
-       char *names[2];
-
-       name_prefix = name ? name : "Unknown pipe";
-       ret = asprintf(&names[0], "%s (read end)", name_prefix);
-       if (ret < 0) {
-               goto end;
-       }
-       ret = asprintf(&names[1], "%s (write end)", name_prefix);
-       if (ret < 0) {
-               goto end;
-       }
-
-       ret = fd_tracker_open_unsuspendable_fd(tracker, pipe,
-                       (const char **) names, 2, open_pipe_cloexec, NULL);
-       free(names[0]);
-       free(names[1]);
-end:
-       return ret;
-}
-
-int fd_tracker_util_pipe_close(struct fd_tracker *tracker, int *pipe)
-{
-       return fd_tracker_close_unsuspendable_fd(
-                       tracker, pipe, 2, close_pipe, NULL);
-}
-
-struct open_directory_handle_args {
-       const struct lttng_directory_handle *in_handle;
-       struct lttng_directory_handle *ret_handle;
-       const char *path;
-};
-
-static
-int open_directory_handle(void *_args, int *out_fds)
-{
-       int ret = 0;
-       struct open_directory_handle_args *args = _args;
-       struct lttng_directory_handle *new_handle = NULL;
-
-       new_handle = args->in_handle ?
-                       lttng_directory_handle_create_from_handle(
-                               args->path, args->in_handle) :
-                       lttng_directory_handle_create(args->path);
-       if (!new_handle) {
-               ret = -errno;
-               goto end;
-       }
-
-       args->ret_handle = new_handle;
-
-       /*
-        * Reserved to indicate that the handle does not use a handle; there is
-        * nothing to track. We want to indicate an error to the fd-tracker so
-        * that it doesn't attempt to track the file descriptor, but also want
-        * the caller to retrieve the newly-created handle.
-        *
-        * Calling this a hack is a fair assessment.
-        */
-       if (!lttng_directory_handle_uses_fd(new_handle)) {
-               ret = ENOTSUP;
-       } else {
-#ifdef HAVE_DIRFD
-               *out_fds = new_handle->dirfd;
-#else
-               abort();
-#endif
-
-       }
-end:
-       return ret;
-}
-
-#ifdef HAVE_DIRFD
-static
-int fd_close(void *unused, int *in_fds)
-{
-       const int ret = close(in_fds[0]);
-
-       in_fds[0] = -1;
-       return ret;
-}
-
-static
-void directory_handle_destroy(
-               struct lttng_directory_handle *handle, void *data)
-{
-       struct fd_tracker *tracker = data;
-       const int ret = fd_tracker_close_unsuspendable_fd(
-                       tracker, &handle->dirfd, 1, fd_close, NULL);
-
-       if (ret) {
-               ERR("Failed to untrack directory handle file descriptor");
-       }
-}
-#endif
-
-struct lttng_directory_handle *fd_tracker_create_directory_handle(
-               struct fd_tracker *tracker, const char *path)
-{
-       return fd_tracker_create_directory_handle_from_handle(
-                       tracker, NULL, path);
-}
-
-struct lttng_directory_handle *fd_tracker_create_directory_handle_from_handle(
-               struct fd_tracker *tracker,
-               struct lttng_directory_handle *in_handle,
-               const char *path)
-{
-       int ret;
-       int dirfd = -1;
-       char *handle_name = NULL;
-       char cwd_path[LTTNG_PATH_MAX] = "working directory";
-       struct lttng_directory_handle *new_handle = NULL;
-       struct open_directory_handle_args open_args = {
-               .in_handle = in_handle,
-               .path = path,
-       };
-
-       if (!path) {
-               if (!getcwd(cwd_path, sizeof(cwd_path))) {
-                       PERROR("Failed to get current working directory to name directory handle");
-                       goto end;
-               }
-       }
-
-       ret = asprintf(&handle_name, "Directory handle to %s",
-                       path ? path : cwd_path);
-       if (ret < 0) {
-               PERROR("Failed to format directory handle name");
-               goto end;
-       }
-
-       ret = fd_tracker_open_unsuspendable_fd(tracker, &dirfd,
-                       (const char **) &handle_name, 1, open_directory_handle,
-                       &open_args);
-       if (ret && ret != ENOTSUP) {
-               ERR("Failed to open directory handle to %s through the fd tracker", path ? path : cwd_path);
-       }
-       new_handle = open_args.ret_handle;
-
-#ifdef HAVE_DIRFD
-       new_handle->destroy_cb = directory_handle_destroy;
-       new_handle->destroy_cb_data = tracker;
-#endif
-end:
-       free(handle_name);
-       return new_handle;
-}