src/common/fd-tracker/utils.c

   1 /*
   2  * Copyright (C) 2018 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License, version 2 only, as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  11  * more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with
  14  * this program; if not, write to the Free Software Foundation, Inc., 51
  15  * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  16  */
  17
  18 #include <unistd.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <common/fd-tracker/utils.h>
  22 #include <common/utils.h>
  23
  24 static
  25 int open_pipe_cloexec(void *data, int *fds)
  26 {
  27         return utils_create_pipe_cloexec(fds);
  28 }
  29
  30 static
  31 int close_pipe(void *data, int *pipe)
  32 {
  33         utils_close_pipe(pipe);
  34         pipe[0] = pipe[1] = -1;
  35         return 0;
  36 }
  37
  38 int fd_tracker_util_close_fd(void *unused, int *fd)
  39 {
  40         return close(*fd);
  41 }
  42
  43 int fd_tracker_util_pipe_open_cloexec(struct fd_tracker *tracker,
  44                 const char *name, int *pipe)
  45 {
  46         int ret;
  47         const char *name_prefix;
  48         char *names[2];
  49
  50         name_prefix = name ? name : "Unknown pipe";
  51         ret = asprintf(&names[0], "%s (read end)", name_prefix);
  52         if (ret < 0) {
  53                 goto end;
  54         }
  55         ret = asprintf(&names[1], "%s (write end)", name_prefix);
  56         if (ret < 0) {
  57                 goto end;
  58         }
  59
  60         ret = fd_tracker_open_unsuspendable_fd(tracker, pipe,
  61                         (const char **) names, 2, open_pipe_cloexec, NULL);
  62         free(names[0]);
  63         free(names[1]);
  64 end:
  65         return ret;
  66 }
  67
  68 int fd_tracker_util_pipe_close(struct fd_tracker *tracker, int *pipe)
  69 {
  70         return fd_tracker_close_unsuspendable_fd(tracker,
  71                         pipe, 2, close_pipe, NULL);
  72 }