glib/tests/unix.c

   1 /*
   2  * Copyright (C) 2011 Red Hat, Inc.
   3  *
   4  * This work is provided "as is"; redistribution and modification
   5  * in whole or in part, in any medium, physical or electronic is
   6  * permitted without restriction.
   7  *
   8  * This work is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * In no event shall the authors or contributors be liable for any
  13  * direct, indirect, incidental, special, exemplary, or consequential
  14  * damages (including, but not limited to, procurement of substitute
  15  * goods or services; loss of use, data, or profits; or business
  16  * interruption) however caused and on any theory of liability, whether
  17  * in contract, strict liability, or tort (including negligence or
  18  * otherwise) arising in any way out of the use of this software, even
  19  * if advised of the possibility of such damage.
  20  *
  21  * Author: Colin Walters <walters@verbum.org>
  22  */
  23
  24 #include "config.h"
  25
  26 #include "glib-unix.h"
  27 #include <string.h>
  28
  29 static void
  30 test_pipe (void)
  31 {
  32   GError *error = NULL;
  33   int pipefd[2];
  34   char buf[1024];
  35   ssize_t bytes_read;
  36   gboolean res;
  37
  38   res = g_unix_open_pipe (pipefd, FD_CLOEXEC, &error);
  39   g_assert (res);
  40   g_assert_no_error (error);
  41
  42   write (pipefd[1], "hello", sizeof ("hello"));
  43   memset (buf, 0, sizeof (buf));
  44   bytes_read = read (pipefd[0], buf, sizeof(buf) - 1);
  45   g_assert_cmpint (bytes_read, >, 0);
  46   buf[bytes_read] = '\0';
  47
  48   close (pipefd[0]);
  49   close (pipefd[1]);
  50
  51   g_assert (g_str_has_prefix (buf, "hello"));
  52 }
  53
  54 static void
  55 test_error (void)
  56 {
  57   GError *error = NULL;
  58   gboolean res;
  59
  60   res = g_unix_set_fd_nonblocking (123456, TRUE, &error);
  61   g_assert_cmpint (errno, ==, EBADF);
  62   g_assert (!res);
  63   g_assert_error (error, G_UNIX_ERROR, 0);
  64   g_clear_error (&error);
  65 }
  66
  67 static void
  68 test_nonblocking (void)
  69 {
  70   GError *error = NULL;
  71   int pipefd[2];
  72   gboolean res;
  73   int flags;
  74
  75   res = g_unix_open_pipe (pipefd, FD_CLOEXEC, &error);
  76   g_assert (res);
  77   g_assert_no_error (error);
  78
  79   res = g_unix_set_fd_nonblocking (pipefd[0], TRUE, &error);
  80   g_assert (res);
  81   g_assert_no_error (error);
  82
  83   flags = fcntl (pipefd[0], F_GETFL);
  84   g_assert_cmpint (flags, !=, -1);
  85   g_assert (flags & O_NONBLOCK);
  86
  87   res = g_unix_set_fd_nonblocking (pipefd[0], FALSE, &error);
  88   g_assert (res);
  89   g_assert_no_error (error);
  90
  91   flags = fcntl (pipefd[0], F_GETFL);
  92   g_assert_cmpint (flags, !=, -1);
  93   g_assert (!(flags & O_NONBLOCK));
  94
  95   close (pipefd[0]);
  96   close (pipefd[1]);
  97 }
  98
  99 static gboolean sig_received = FALSE;
 100 static gboolean sig_timeout = FALSE;
 101 static int sig_counter = 0;
 102
 103 static gboolean
 104 on_sig_received (gpointer user_data)
 105 {
 106   GMainLoop *loop = user_data;
 107   g_main_loop_quit (loop);
 108   sig_received = TRUE;
 109   sig_counter ++;
 110   return G_SOURCE_REMOVE;
 111 }
 112
 113 static gboolean
 114 on_sig_timeout (gpointer data)
 115 {
 116   GMainLoop *loop = data;
 117   g_main_loop_quit (loop);
 118   sig_timeout = TRUE;
 119   return G_SOURCE_REMOVE;
 120 }
 121
 122 static gboolean
 123 exit_mainloop (gpointer data)
 124 {
 125   GMainLoop *loop = data;
 126   g_main_loop_quit (loop);
 127   return G_SOURCE_REMOVE;
 128 }
 129
 130 static gboolean
 131 on_sig_received_2 (gpointer data)
 132 {
 133   GMainLoop *loop = data;
 134
 135   sig_counter ++;
 136   if (sig_counter == 2)
 137     g_main_loop_quit (loop);
 138   return G_SOURCE_REMOVE;
 139 }
 140
 141 static void
 142 test_signal (int signum)
 143 {
 144   GMainLoop *mainloop;
 145   int id;
 146
 147   mainloop = g_main_loop_new (NULL, FALSE);
 148
 149   sig_received = FALSE;
 150   sig_counter = 0;
 151   g_unix_signal_add (signum, on_sig_received, mainloop);
 152   kill (getpid (), signum);
 153   g_assert (!sig_received);
 154   id = g_timeout_add (5000, on_sig_timeout, mainloop);
 155   g_main_loop_run (mainloop);
 156   g_assert (sig_received);
 157   sig_received = FALSE;
 158   g_source_remove (id);
 159
 160   /* Ensure we don't get double delivery */
 161   g_timeout_add (500, exit_mainloop, mainloop);
 162   g_main_loop_run (mainloop);
 163   g_assert (!sig_received);
 164
 165   /* Ensure that two sources for the same signal get it */
 166   sig_counter = 0;
 167   g_unix_signal_add (signum, on_sig_received_2, mainloop);
 168   g_unix_signal_add (signum, on_sig_received_2, mainloop);
 169   id = g_timeout_add (5000, on_sig_timeout, mainloop);
 170
 171   kill (getpid (), signum);
 172   g_main_loop_run (mainloop);
 173   g_assert_cmpint (sig_counter, ==, 2);
 174   g_source_remove (id);
 175
 176   g_main_loop_unref (mainloop);
 177 }
 178
 179 static void
 180 test_sighup (void)
 181 {
 182   test_signal (SIGHUP);
 183 }
 184
 185 static void
 186 test_sigterm (void)
 187 {
 188   test_signal (SIGTERM);
 189 }
 190
 191 static void
 192 test_sighup_add_remove (void)
 193 {
 194   guint id;
 195   struct sigaction action;
 196
 197   sig_received = FALSE;
 198   id = g_unix_signal_add (SIGHUP, on_sig_received, NULL);
 199   g_source_remove (id);
 200
 201   sigaction (SIGHUP, NULL, &action);
 202   g_assert (action.sa_handler == SIG_DFL);
 203 }
 204
 205 static gboolean
 206 nested_idle (gpointer data)
 207 {
 208   GMainLoop *nested;
 209   GMainContext *context;
 210   GSource *source;
 211
 212   context = g_main_context_new ();
 213   nested = g_main_loop_new (context, FALSE);
 214
 215   source = g_unix_signal_source_new (SIGHUP);
 216   g_source_set_callback (source, on_sig_received, nested, NULL);
 217   g_source_attach (source, context);
 218   g_source_unref (source);
 219
 220   kill (getpid (), SIGHUP);
 221   g_main_loop_run (nested);
 222   g_assert_cmpint (sig_counter, ==, 1);
 223
 224   g_main_loop_unref (nested);
 225   g_main_context_unref (context);
 226
 227   return G_SOURCE_REMOVE;
 228 }
 229
 230 static void
 231 test_sighup_nested (void)
 232 {
 233   GMainLoop *mainloop;
 234
 235   mainloop = g_main_loop_new (NULL, FALSE);
 236
 237   sig_counter = 0;
 238   sig_received = FALSE;
 239   g_unix_signal_add (SIGHUP, on_sig_received, mainloop);
 240   g_idle_add (nested_idle, mainloop);
 241
 242   g_main_loop_run (mainloop);
 243   g_assert_cmpint (sig_counter, ==, 2);
 244
 245   g_main_loop_unref (mainloop);
 246 }
 247
 248 int
 249 main (int   argc,
 250       char *argv[])
 251 {
 252   g_test_init (&argc, &argv, NULL);
 253
 254   g_test_add_func ("/glib-unix/pipe", test_pipe);
 255   g_test_add_func ("/glib-unix/error", test_error);
 256   g_test_add_func ("/glib-unix/nonblocking", test_nonblocking);
 257   g_test_add_func ("/glib-unix/sighup", test_sighup);
 258   g_test_add_func ("/glib-unix/sigterm", test_sigterm);
 259   g_test_add_func ("/glib-unix/sighup_again", test_sighup);
 260   g_test_add_func ("/glib-unix/sighup_add_remove", test_sighup_add_remove);
 261   g_test_add_func ("/glib-unix/sighup_nested", test_sighup_nested);
 262
 263   return g_test_run();
 264 }