FatalError: new library to replace mpd_error.h

15 files changed, 222 insertions, 76 deletions

diff --git a/Makefile.am b/Makefile.am
index 245f1f396..b21761092 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -91,6 +91,7 @@ src_mpd_SOURCES = \
 	src/thread/PosixCond.hxx \
 	src/thread/WindowsCond.hxx \
 	src/thread/GLibCond.hxx \
+	src/FatalError.cxx src/FatalError.hxx \
 	src/clock.c src/clock.h \
 	src/notify.cxx src/notify.hxx \
 	src/AudioConfig.cxx src/AudioConfig.hxx \
@@ -1360,6 +1361,7 @@ endif
 if ENABLE_INOTIFY
 noinst_PROGRAMS += test/run_inotify
 test_run_inotify_SOURCES = test/run_inotify.cxx \
+	src/FatalError.cxx \
 	src/fd_util.c \
 	src/InotifySource.cxx
 test_run_inotify_LDADD = \
diff --git a/src/Daemon.cxx b/src/Daemon.cxx
index e14b8aee7..84e32d43a 100644
--- a/src/Daemon.cxx
+++ b/src/Daemon.cxx
@@ -19,13 +19,13 @@
 
 #include "config.h"
 #include "Daemon.hxx"
+#include "FatalError.hxx"
 
 #include <glib.h>
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <errno.h>
 #include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -65,23 +65,23 @@ daemonize_kill(void)
 	int pid, ret;
 
 	if (pidfile == nullptr)
-		MPD_ERROR("no pid_file specified in the config file");
+		FatalError("no pid_file specified in the config file");
 
 	fp = fopen(pidfile, "r");
 	if (fp == nullptr)
-		MPD_ERROR("unable to open pid file \"%s\": %s",
-			  pidfile, g_strerror(errno));
+		FormatFatalSystemError("Unable to open pid file \"%s\"",
+				       pidfile);
 
 	if (fscanf(fp, "%i", &pid) != 1) {
-		MPD_ERROR("unable to read the pid from file \"%s\"",
-			  pidfile);
+		FormatFatalError("unable to read the pid from file \"%s\"",
+				 pidfile);
 	}
 	fclose(fp);
 
 	ret = kill(pid, SIGTERM);
 	if (ret < 0)
-		MPD_ERROR("unable to kill process %i: %s",
-			  pid, g_strerror(errno));
+		FormatFatalSystemError("unable to kill process %i",
+				       int(pid));
 
 	exit(EXIT_SUCCESS);
 }
@@ -102,8 +102,8 @@ daemonize_set_user(void)
 	/* set gid */
 	if (user_gid != (gid_t)-1 && user_gid != getgid()) {
 		if (setgid(user_gid) == -1) {
-			MPD_ERROR("cannot setgid to %d: %s",
-				  (int)user_gid, g_strerror(errno));
+			FormatFatalSystemError("Failed to set group %d",
+					       (int)user_gid);
 		}
 	}
 
@@ -112,17 +112,17 @@ daemonize_set_user(void)
 	 * (must be done before we change our uid)
 	 */
 	if (!had_group && initgroups(user_name, user_gid) == -1) {
-		g_warning("cannot init supplementary groups "
-			  "of user \"%s\": %s",
-			  user_name, g_strerror(errno));
+		FormatFatalSystemError("Failed to set supplementary groups "
+				       "of user \"%s\"",
+				       user_name);
 	}
 #endif
 
 	/* set uid */
 	if (user_uid != (uid_t)-1 && user_uid != getuid() &&
 	    setuid(user_uid) == -1) {
-		MPD_ERROR("cannot change to uid of user \"%s\": %s",
-			  user_name, g_strerror(errno));
+		FormatFatalSystemError("Failed to set user \"%s\"",
+				       user_name);
 	}
 }
 
@@ -136,7 +136,7 @@ daemonize_detach(void)
 #ifdef HAVE_DAEMON
 
 	if (daemon(0, 1))
-		MPD_ERROR("daemon() failed: %s", g_strerror(errno));
+		FatalSystemError("daemon() failed");
 
 #elif defined(HAVE_FORK)
 
@@ -144,7 +144,7 @@ daemonize_detach(void)
 
 	switch (fork()) {
 	case -1:
-		MPD_ERROR("fork() failed: %s", g_strerror(errno));
+		FatalSystemError("fork() failed");
 	case 0:
 		break;
 	default:
@@ -155,14 +155,14 @@ daemonize_detach(void)
 	/* release the current working directory */
 
 	if (chdir("/") < 0)
-		MPD_ERROR("problems changing to root directory");
+		FatalError("problems changing to root directory");
 
 	/* detach from the current session */
 
 	setsid();
 
 #else
-	MPD_ERROR("no support for daemonizing");
+	FatalError("no support for daemonizing");
 #endif
 
 	g_debug("daemonized!");
@@ -179,8 +179,8 @@ daemonize(bool detach)
 		g_debug("opening pid file");
 		fp = fopen(pidfile, "w+");
 		if (!fp) {
-			MPD_ERROR("could not create pid file \"%s\": %s",
-				  pidfile, g_strerror(errno));
+			FormatFatalSystemError("Failed to create pid file \"%s\"",
+					       pidfile);
 		}
 	}
 
@@ -200,7 +200,7 @@ daemonize_init(const char *user, const char *group, const char *_pidfile)
 	if (user) {
 		struct passwd *pwd = getpwnam(user);
 		if (pwd == nullptr)
-			MPD_ERROR("no such user \"%s\"", user);
+			FormatFatalError("no such user \"%s\"", user);
 
 		user_uid = pwd->pw_uid;
 		user_gid = pwd->pw_gid;
@@ -214,7 +214,7 @@ daemonize_init(const char *user, const char *group, const char *_pidfile)
 	if (group) {
 		struct group *grp = getgrnam(group);
 		if (grp == nullptr)
-			MPD_ERROR("no such group \"%s\"", group);
+			FormatFatalError("no such group \"%s\"", group);
 		user_gid = grp->gr_gid;
 		had_group = true;
 	}
diff --git a/src/Daemon.hxx b/src/Daemon.hxx
index a4117537d..cd4cc965e 100644
--- a/src/Daemon.hxx
+++ b/src/Daemon.hxx
@@ -20,8 +20,6 @@
 #ifndef MPD_DAEMON_HXX
 #define MPD_DAEMON_HXX
 
-#include "mpd_error.h"
-
 #ifndef WIN32
 void
 daemonize_init(const char *user, const char *group, const char *pidfile);
@@ -48,10 +46,12 @@ daemonize_finish(void)
 void
 daemonize_kill(void);
 #else
-#include <glib.h>
+#include "FatalError.hxx"
 static inline void
 daemonize_kill(void)
-{ MPD_ERROR("--kill is not available on WIN32"); }
+{
+	FatalError("--kill is not available on WIN32");
+}
 #endif
 
 /**
diff --git a/src/DecoderThread.cxx b/src/DecoderThread.cxx
index 3ebd5653e..61c1fdd8a 100644
--- a/src/DecoderThread.cxx
+++ b/src/DecoderThread.cxx
@@ -24,7 +24,7 @@
 #include "DecoderError.hxx"
 #include "DecoderPlugin.hxx"
 #include "Song.hxx"
-#include "mpd_error.h"
+#include "FatalError.hxx"
 #include "Mapper.hxx"
 #include "fs/Path.hxx"
 #include "DecoderAPI.hxx"
@@ -501,6 +501,6 @@ decoder_thread_start(struct decoder_control *dc)
 	GError *e = NULL;
 	dc->thread = g_thread_create(decoder_task, dc, true, &e);
 	if (dc->thread == NULL)
-		MPD_ERROR("Failed to spawn decoder task: %s", e->message);
+		FatalError("Failed to spawn decoder task", e);
 #endif
 }
diff --git a/src/FatalError.cxx b/src/FatalError.cxx
new file mode 100644
index 000000000..30ddc50ea
--- /dev/null
+++ b/src/FatalError.cxx
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "FatalError.hxx"
+
+#include <glib.h>
+
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+#ifdef WIN32
+#include <windows.h>
+#else
+#include <errno.h>
+#endif
+
+#undef G_LOG_DOMAIN
+#define G_LOG_DOMAIN "FatalError"
+
+void
+FatalError(const char *msg)
+{
+	g_critical("%s", msg);
+	exit(EXIT_FAILURE);
+}
+
+void
+FormatFatalError(const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	g_logv(G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, fmt, ap);
+	va_end(ap);
+
+	exit(EXIT_FAILURE);
+}
+
+void
+FatalError(GError *error)
+{
+	FatalError(error->message);
+}
+
+void
+FatalError(const char *msg, GError *error)
+{
+	FormatFatalError("%s: %s", msg, error->message);
+}
+
+void
+FatalSystemError(const char *msg)
+{
+	const char *system_error;
+#ifdef WIN32
+	system_error = g_win32_error_message(GetLastError());
+#else
+	system_error = g_strerror(errno);
+#endif
+
+	g_critical("%s: %s", msg, system_error);
+	exit(EXIT_FAILURE);
+}
+
+void
+FormatFatalSystemError(const char *fmt, ...)
+{
+	char buffer[1024];
+	va_list ap;
+	va_start(ap, fmt);
+	vsnprintf(buffer, sizeof(buffer), fmt, ap);
+	va_end(ap);
+
+	FatalSystemError(buffer);
+}
diff --git a/src/FatalError.hxx b/src/FatalError.hxx
new file mode 100644
index 000000000..3918e5fc1
--- /dev/null
+++ b/src/FatalError.hxx
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2003-2013 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_FATAL_ERROR_HXX
+#define MPD_FATAL_ERROR_HXX
+
+#include "gerror.h"
+#include "gcc.h"
+
+/**
+ * Log the specified message and abort the process.
+ */
+gcc_noreturn
+void
+FatalError(const char *msg);
+
+gcc_noreturn
+void
+FormatFatalError(const char *fmt, ...);
+
+gcc_noreturn
+void
+FatalError(GError *error);
+
+gcc_noreturn
+void
+FatalError(const char *msg, GError *error);
+
+/**
+ * Call this after a system call has failed that is not supposed to
+ * fail.  Prints the given message, the system error message (from
+ * errno or GetLastError()) and abort the process.
+ */
+gcc_noreturn
+void
+FatalSystemError(const char *msg);
+
+gcc_noreturn
+void
+FormatFatalSystemError(const char *fmt, ...);
+
+#endif
diff --git a/src/InotifySource.cxx b/src/InotifySource.cxx
index 5552ed578..ff161b6c6 100644
--- a/src/InotifySource.cxx
+++ b/src/InotifySource.cxx
@@ -21,7 +21,7 @@
 #include "InotifySource.hxx"
 #include "util/fifo_buffer.h"
 #include "fd_util.h"
-#include "mpd_error.h"
+#include "FatalError.hxx"
 
 #include <glib.h>
 
@@ -50,14 +50,13 @@ InotifySource::OnSocketReady(gcc_unused unsigned flags)
 
 	dest = fifo_buffer_write(buffer, &length);
 	if (dest == NULL)
-		MPD_ERROR("buffer full");
+		FatalError("buffer full");
 
 	nbytes = read(Get(), dest, length);
 	if (nbytes < 0)
-		MPD_ERROR("failed to read from inotify: %s",
-			  g_strerror(errno));
+		FatalSystemError("Failed to read from inotify");
 	if (nbytes == 0)
-		MPD_ERROR("end of file from inotify");
+		FatalError("end of file from inotify");
 
 	fifo_buffer_append(buffer, nbytes);
 
diff --git a/src/Log.cxx b/src/Log.cxx
index 96ac106cc..37bff9c78 100644
--- a/src/Log.cxx
+++ b/src/Log.cxx
@@ -21,6 +21,7 @@
 #include "Log.hxx"
 #include "conf.h"
 #include "fd_util.h"
+#include "FatalError.hxx"
 #include "mpd_error.h"
 
 #include <assert.h>
@@ -60,9 +61,9 @@ static void redirect_logs(int fd)
 {
 	assert(fd >= 0);
 	if (dup2(fd, STDOUT_FILENO) < 0)
-		MPD_ERROR("problems dup2 stdout : %s\n", strerror(errno));
+		FatalSystemError("Failed to dup2 stdout");
 	if (dup2(fd, STDERR_FILENO) < 0)
-		MPD_ERROR("problems dup2 stderr : %s\n", strerror(errno));
+		FatalSystemError("Failed to dup2 stderr");
 }
 
 static const char *log_date(void)
diff --git a/src/Main.cxx b/src/Main.cxx
index 307811380..4efe59325 100644
--- a/src/Main.cxx
+++ b/src/Main.cxx
@@ -55,13 +55,12 @@
 #include "AudioConfig.hxx"
 #include "pcm/PcmResample.hxx"
 #include "Daemon.hxx"
+#include "FatalError.hxx"
 
 extern "C" {
 #include "stats.h"
 }
 
-#include "mpd_error.h"
-
 #ifdef ENABLE_INOTIFY
 #include "InotifyUpdate.hxx"
 #endif
@@ -194,13 +193,13 @@ glue_db_init_and_load(void)
 	}
 
 	if (!DatabaseGlobalInit(*param, &error))
-		MPD_ERROR("%s", error->message);
+		FatalError(error);
 
 	delete allocated;
 
 	ret = DatabaseGlobalOpen(&error);
 	if (!ret)
-		MPD_ERROR("%s", error->message);
+		FatalError(error);
 
 	/* run database update after daemonization? */
 	return !db_is_simple() || db_exists();
@@ -216,10 +215,10 @@ glue_sticker_init(void)
 	GError *error = NULL;
 	char *sticker_file = config_dup_path(CONF_STICKER_FILE, &error);
 	if (sticker_file == NULL && error != NULL)
-		MPD_ERROR("%s", error->message);
+		FatalError(error);
 
 	if (!sticker_global_init(sticker_file, &error))
-		MPD_ERROR("%s", error->message);
+		FatalError(error);
 
 	g_free(sticker_file);
 #endif
@@ -268,16 +267,12 @@ static void winsock_init(void)
 
 	retval = WSAStartup(MAKEWORD(2, 2), &sockinfo);
 	if(retval != 0)
-	{
-		MPD_ERROR("Attempt to open Winsock2 failed; error code %d\n",
-			retval);
-	}
+		FormatFatalError("Attempt to open Winsock2 failed; error code %d",
+				 retval);
 
 	if (LOBYTE(sockinfo.wVersion) != 2)
-	{
-		MPD_ERROR("We use Winsock2 but your version is either too new "
-			  "or old; please install Winsock 2.x\n");
-	}
+		FatalError("We use Winsock2 but your version is either too new "
+			   "or old; please install Winsock 2.x");
 #endif
 }
 
@@ -298,8 +293,9 @@ initialize_decoder_and_player(void)
 	if (param != NULL) {
 		long tmp = strtol(param->value, &test, 10);
 		if (*test != '\0' || tmp <= 0 || tmp == LONG_MAX)
-			MPD_ERROR("buffer size \"%s\" is not a positive integer, "
-				  "line %i\n", param->value, param->line);
+			FormatFatalError("buffer size \"%s\" is not a "
+					 "positive integer, line %i",
+					 param->value, param->line);
 		buffer_size = tmp;
 	} else
 		buffer_size = DEFAULT_BUFFER_SIZE;
@@ -309,15 +305,17 @@ initialize_decoder_and_player(void)
 	buffered_chunks = buffer_size / CHUNK_SIZE;
 
 	if (buffered_chunks >= 1 << 15)
-		MPD_ERROR("buffer size \"%li\" is too big\n", (long)buffer_size);
+		FormatFatalError("buffer size \"%lu\" is too big",
+				 (unsigned long)buffer_size);
 
 	param = config_get_param(CONF_BUFFER_BEFORE_PLAY);
 	if (param != NULL) {
 		perc = strtod(param->value, &test);
 		if (*test != '%' || perc < 0 || perc > 100) {
-			MPD_ERROR("buffered before play \"%s\" is not a positive "
-				  "percentage and less than 100 percent, line %i",
-				  param->value, param->line);
+			FormatFatalError("buffered before play \"%s\" is not "
+					 "a positive percentage and less "
+					 "than 100 percent, line %i",
+					 param->value, param->line);
 		}
 	} else
 		perc = DEFAULT_BUFFER_BEFORE_PLAY;
@@ -505,7 +503,7 @@ int mpd_main(int argc, char *argv[])
 		   database */
 		unsigned job = update_enqueue(NULL, true);
 		if (job == 0)
-			MPD_ERROR("directory update failed");
+			FatalError("directory update failed");
 	}
 
 	if (!glue_state_file_init(&error)) {
diff --git a/src/MusicBuffer.cxx b/src/MusicBuffer.cxx
index ea03fc0b9..049fb81d9 100644
--- a/src/MusicBuffer.cxx
+++ b/src/MusicBuffer.cxx
@@ -22,7 +22,7 @@
 #include "MusicChunk.hxx"
 #include "thread/Mutex.hxx"
 #include "util/SliceBuffer.hxx"
-#include "mpd_error.h"
+#include "FatalError.hxx"
 
 #include <assert.h>
 
@@ -33,7 +33,7 @@ struct music_buffer : public SliceBuffer<music_chunk>  {
 	music_buffer(unsigned num_chunks)
 		:SliceBuffer(num_chunks) {
 		if (IsOOM())
-			MPD_ERROR("Failed to allocate buffer");
+			FatalError("Failed to allocate buffer");
 	}
 };
 
diff --git a/src/OutputAll.cxx b/src/OutputAll.cxx
index 23fe9ae2d..c58f54597 100644
--- a/src/OutputAll.cxx
+++ b/src/OutputAll.cxx
@@ -26,7 +26,7 @@
 #include "MusicBuffer.hxx"
 #include "MusicPipe.hxx"
 #include "MusicChunk.hxx"
-#include "mpd_error.h"
+#include "FatalError.hxx"
 #include "conf.h"
 #include "notify.hxx"
 
@@ -128,10 +128,10 @@ audio_output_all_init(struct player_control *pc)
 		struct audio_output *output = audio_output_new(*param, pc, &error);
 		if (output == NULL) {
 			if (param != NULL)
-				MPD_ERROR("line %i: %s",
-					  param->line, error->message);
+				FormatFatalError("line %i: %s",
+						 param->line, error->message);
 			else
-				MPD_ERROR("%s", error->message);
+				FatalError(error);
 		}
 
 		audio_outputs[i] = output;
@@ -139,8 +139,8 @@ audio_output_all_init(struct player_control *pc)
 		/* require output names to be unique: */
 		for (j = 0; j < i; j++) {
 			if (!strcmp(output->name, audio_outputs[j]->name)) {
-				MPD_ERROR("output devices with identical "
-					  "names: %s\n", output->name);
+				FormatFatalError("output devices with identical "
+						 "names: %s", output->name);
 			}
 		}
 	}
diff --git a/src/OutputThread.cxx b/src/OutputThread.cxx
index 483d35680..081b89f35 100644
--- a/src/OutputThread.cxx
+++ b/src/OutputThread.cxx
@@ -29,8 +29,7 @@
 #include "PlayerControl.hxx"
 #include "MusicPipe.hxx"
 #include "MusicChunk.hxx"
-
-#include "mpd_error.h"
+#include "FatalError.hxx"
 #include "gcc.h"
 
 #include <glib.h>
@@ -676,6 +675,6 @@ void audio_output_thread_start(struct audio_output *ao)
 #else
 	GError *e = nullptr;
 	if (!(ao->thread = g_thread_create(audio_output_task, ao, true, &e)))
-		MPD_ERROR("Failed to spawn output task: %s\n", e->message);
+		FatalError("Failed to spawn output task", e);
 #endif
 }
diff --git a/src/PlayerThread.cxx b/src/PlayerThread.cxx
index a2dcb2c46..948ad9b90 100644
--- a/src/PlayerThread.cxx
+++ b/src/PlayerThread.cxx
@@ -26,7 +26,7 @@
 #include "MusicChunk.hxx"
 #include "Song.hxx"
 #include "Main.hxx"
-#include "mpd_error.h"
+#include "FatalError.hxx"
 #include "CrossFade.hxx"
 #include "PlayerControl.hxx"
 #include "OutputAll.hxx"
@@ -1207,6 +1207,6 @@ player_create(struct player_control *pc)
 	GError *e = NULL;
 	pc->thread = g_thread_create(player_task, pc, true, &e);
 	if (pc->thread == NULL)
-		MPD_ERROR("Failed to spawn player task: %s", e->message);
+		FatalError("Failed to spawn player task", e);
 #endif
 }
diff --git a/src/SignalHandlers.cxx b/src/SignalHandlers.cxx
index d671dc408..36408dc78 100644
--- a/src/SignalHandlers.cxx
+++ b/src/SignalHandlers.cxx
@@ -26,13 +26,11 @@
 #include "Main.hxx"
 #include "event/Loop.hxx"
 #include "GlobalEvents.hxx"
-#include "mpd_error.h"
+#include "FatalError.hxx"
 
 #include <glib.h>
 
 #include <signal.h>
-#include <errno.h>
-#include <string.h>
 
 static void exit_signal_handler(gcc_unused int signum)
 {
@@ -48,7 +46,7 @@ static void
 x_sigaction(int signum, const struct sigaction *act)
 {
 	if (sigaction(signum, act, NULL) < 0)
-		MPD_ERROR("sigaction() failed: %s", strerror(errno));
+		FatalSystemError("sigaction() failed");
 }
 
 static void
diff --git a/src/UpdateGlue.cxx b/src/UpdateGlue.cxx
index 5c63efcda..08ba9783f 100644
--- a/src/UpdateGlue.cxx
+++ b/src/UpdateGlue.cxx
@@ -33,7 +33,7 @@ extern "C" {
 
 #include "Main.hxx"
 #include "Instance.hxx"
-#include "mpd_error.h"
+#include "FatalError.hxx"
 
 #include <glib.h>
 
@@ -110,7 +110,7 @@ spawn_update_task(const char *path)
 	GError *e = NULL;
 	update_thr = g_thread_create(update_task, g_strdup(path), TRUE, &e);
 	if (update_thr == NULL)
-		MPD_ERROR("Failed to spawn update task: %s", e->message);
+		FatalError("Failed to spawn update task", e);
 #endif
 
 	if (++update_task_id > update_task_id_max)