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 <common/fd-tracker/utils.h>
  19 #include <common/utils.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23
  24 static int open_pipe_cloexec(void *data, int *fds)
  25 {
  26         return utils_create_pipe_cloexec(fds);
  27 }
  28
  29 static int close_pipe(void *data, int *pipe)
  30 {
  31         utils_close_pipe(pipe);
  32         pipe[0] = pipe[1] = -1;
  33         return 0;
  34 }
  35
  36 int fd_tracker_util_close_fd(void *unused, int *fd)
  37 {
  38         return close(*fd);
  39 }
  40
  41 int fd_tracker_util_pipe_open_cloexec(
  42                 struct fd_tracker *tracker, const char *name, int *pipe)
  43 {
  44         int ret;
  45         const char *name_prefix;
  46         char *names[2];
  47
  48         name_prefix = name ? name : "Unknown pipe";
  49         ret = asprintf(&names[0], "%s (read end)", name_prefix);
  50         if (ret < 0) {
  51                 goto end;
  52         }
  53         ret = asprintf(&names[1], "%s (write end)", name_prefix);
  54         if (ret < 0) {
  55                 goto end;
  56         }
  57
  58         ret = fd_tracker_open_unsuspendable_fd(tracker, pipe,
  59                         (const char **) names, 2, open_pipe_cloexec, NULL);
  60         free(names[0]);
  61         free(names[1]);
  62 end:
  63         return ret;
  64 }
  65
  66 int fd_tracker_util_pipe_close(struct fd_tracker *tracker, int *pipe)
  67 {
  68         return fd_tracker_close_unsuspendable_fd(
  69                         tracker, pipe, 2, close_pipe, NULL);
  70 }