src/common/fd-tracker/utils.c

   1 /*
   2  * Copyright (C) 2018 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #include <common/fd-tracker/utils.h>
   9 #include <common/utils.h>
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13
  14 static int open_pipe_cloexec(void *data, int *fds)
  15 {
  16         return utils_create_pipe_cloexec(fds);
  17 }
  18
  19 static int close_pipe(void *data, int *pipe)
  20 {
  21         utils_close_pipe(pipe);
  22         pipe[0] = pipe[1] = -1;
  23         return 0;
  24 }
  25
  26 int fd_tracker_util_close_fd(void *unused, int *fd)
  27 {
  28         return close(*fd);
  29 }
  30
  31 int fd_tracker_util_pipe_open_cloexec(
  32                 struct fd_tracker *tracker, const char *name, int *pipe)
  33 {
  34         int ret;
  35         const char *name_prefix;
  36         char *names[2];
  37
  38         name_prefix = name ? name : "Unknown pipe";
  39         ret = asprintf(&names[0], "%s (read end)", name_prefix);
  40         if (ret < 0) {
  41                 goto end;
  42         }
  43         ret = asprintf(&names[1], "%s (write end)", name_prefix);
  44         if (ret < 0) {
  45                 goto end;
  46         }
  47
  48         ret = fd_tracker_open_unsuspendable_fd(tracker, pipe,
  49                         (const char **) names, 2, open_pipe_cloexec, NULL);
  50         free(names[0]);
  51         free(names[1]);
  52 end:
  53         return ret;
  54 }
  55
  56 int fd_tracker_util_pipe_close(struct fd_tracker *tracker, int *pipe)
  57 {
  58         return fd_tracker_close_unsuspendable_fd(
  59                         tracker, pipe, 2, close_pipe, NULL);
  60 }