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
  45  * no exported enumeration mapping %errno.  Instead, all functions
  46  * ensure that %errno is relevant.  The code for all #G_UNIX_ERROR is
  47  * always <literal>0</literal>, and the error message is always
  48  * generated via g_strerror().
  49  *
  50  * It is expected that most code will not look at %errno from these
  51  * APIs. Important cases where one would want to differentiate between
  52  * errors are already covered by existing cross-platform GLib API,
  53  * such as e.g. #GFile wrapping <literal>ENOENT</literal>.  However, it is
  54  * provided for completeness, at least.
  55  */
  56 #define G_UNIX_ERROR (g_unix_error_quark())
  57
  58 GLIB_AVAILABLE_IN_2_30
  59 GQuark g_unix_error_quark (void);
  60
  61 GLIB_AVAILABLE_IN_2_30
  62 gboolean g_unix_open_pipe (gint    *fds,
  63                            gint     flags,
  64                            GError **error);
  65
  66 GLIB_AVAILABLE_IN_2_30
  67 gboolean g_unix_set_fd_nonblocking (gint       fd,
  68                                     gboolean   nonblock,
  69                                     GError   **error);
  70
  71 GLIB_AVAILABLE_IN_2_30
  72 GSource *g_unix_signal_source_new  (gint signum);
  73
  74 GLIB_AVAILABLE_IN_2_30
  75 guint    g_unix_signal_add_full    (gint           priority,
  76                                     gint           signum,
  77                                     GSourceFunc    handler,
  78                                     gpointer       user_data,
  79                                     GDestroyNotify notify);
  80
  81 GLIB_AVAILABLE_IN_2_30
  82 guint    g_unix_signal_add         (gint        signum,
  83                                     GSourceFunc handler,
  84                                     gpointer    user_data);
  85
  86 /**
  87  * GUnixFDSourceFunc:
  88  * @fd: the fd that triggered the event
  89  * @condition: the IO conditions reported on @fd
  90  * @user_data: user data passed to g_unix_fd_add()
  91  *
  92  * The type of functions to be called when a UNIX fd watch source
  93  * triggers.
  94  *
  95  * Returns: %FALSE if the source should be removed
  96  **/
  97 typedef gboolean (*GUnixFDSourceFunc) (gint         fd,
  98                                        GIOCondition condition,
  99                                        gpointer     user_data);
 100
 101 GLIB_AVAILABLE_IN_2_36
 102 GSource *g_unix_fd_source_new      (gint         fd,
 103                                     GIOCondition condition);
 104
 105 GLIB_AVAILABLE_IN_2_36
 106 guint    g_unix_fd_add_full        (gint              priority,
 107                                     gint              fd,
 108                                     GIOCondition      condition,
 109                                     GUnixFDSourceFunc function,
 110                                     gpointer          user_data,
 111                                     GDestroyNotify    notify);
 112
 113 GLIB_AVAILABLE_IN_2_36
 114 guint    g_unix_fd_add             (gint              fd,
 115                                     GIOCondition      condition,
 116                                     GUnixFDSourceFunc function,
 117                                     gpointer          user_data);
 118
 119 G_END_DECLS
 120
 121 #endif  /* __G_UNIX_H__ */