glib/glib-unix.h

   1 /* glib-unix.h - Unix specific integration
   2  * Copyright (C) 2011 Red Hat, Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef __G_UNIX_H__
  19 #define __G_UNIX_H__
  20
  21 /* We need to include the UNIX headers needed to use the APIs below,
  22  * but we also take this opportunity to include a wide selection of
  23  * other UNIX headers.  If one of the headers below is broken on some
  24  * system, work around it here (or better, fix the system or tell
  25  * people to use a better one).
  26  */
  27 #include <unistd.h>
  28 #include <errno.h>
  29 #include <sys/wait.h>
  30 #include <stdlib.h>
  31 #include <fcntl.h>
  32
  33 #include <glib.h>
  34
  35 #ifndef G_OS_UNIX
  36 #error "This header may only be used on UNIX"
  37 #endif
  38
  39 G_BEGIN_DECLS
  40
  41 /**
  42  * G_UNIX_ERROR:
  43  *
  44  * Error domain for API in the g_unix_ namespace. Note that there is no
  45  * exported enumeration mapping %errno. Instead, all functions ensure that
  46  * %errno is relevant. The code for all #G_UNIX_ERROR is always 0, and the
  47  * error message is always generated via g_strerror().
  48  *
  49  * It is expected that most code will not look at %errno from these APIs.
  50  * Important cases where one would want to differentiate between errors are
  51  * already covered by existing cross-platform GLib API, such as e.g. #GFile
  52  * wrapping `ENOENT`. However, it is provided for completeness, at least.
  53  */
  54 #define G_UNIX_ERROR (g_unix_error_quark())
  55
  56 GLIB_AVAILABLE_IN_2_30
  57 GQuark g_unix_error_quark (void);
  58
  59 GLIB_AVAILABLE_IN_2_30
  60 gboolean g_unix_open_pipe (gint    *fds,
  61                            gint     flags,
  62                            GError **error);
  63
  64 GLIB_AVAILABLE_IN_2_30
  65 gboolean g_unix_set_fd_nonblocking (gint       fd,
  66                                     gboolean   nonblock,
  67                                     GError   **error);
  68
  69 GLIB_AVAILABLE_IN_2_30
  70 GSource *g_unix_signal_source_new  (gint signum);
  71
  72 GLIB_AVAILABLE_IN_2_30
  73 guint    g_unix_signal_add_full    (gint           priority,
  74                                     gint           signum,
  75                                     GSourceFunc    handler,
  76                                     gpointer       user_data,
  77                                     GDestroyNotify notify);
  78
  79 GLIB_AVAILABLE_IN_2_30
  80 guint    g_unix_signal_add         (gint        signum,
  81                                     GSourceFunc handler,
  82                                     gpointer    user_data);
  83
  84 /**
  85  * GUnixFDSourceFunc:
  86  * @fd: the fd that triggered the event
  87  * @condition: the IO conditions reported on @fd
  88  * @user_data: user data passed to g_unix_fd_add()
  89  *
  90  * The type of functions to be called when a UNIX fd watch source
  91  * triggers.
  92  *
  93  * Returns: %FALSE if the source should be removed
  94  **/
  95 typedef gboolean (*GUnixFDSourceFunc) (gint         fd,
  96                                        GIOCondition condition,
  97                                        gpointer     user_data);
  98
  99 GLIB_AVAILABLE_IN_2_36
 100 GSource *g_unix_fd_source_new      (gint         fd,
 101                                     GIOCondition condition);
 102
 103 GLIB_AVAILABLE_IN_2_36
 104 guint    g_unix_fd_add_full        (gint              priority,
 105                                     gint              fd,
 106                                     GIOCondition      condition,
 107                                     GUnixFDSourceFunc function,
 108                                     gpointer          user_data,
 109                                     GDestroyNotify    notify);
 110
 111 GLIB_AVAILABLE_IN_2_36
 112 guint    g_unix_fd_add             (gint              fd,
 113                                     GIOCondition      condition,
 114                                     GUnixFDSourceFunc function,
 115                                     gpointer          user_data);
 116
 117 G_END_DECLS
 118
 119 #endif  /* __G_UNIX_H__ */