Add EMPATHY_LOGFILE env variable. Fixes bug #455240 (Guillaume Desmottes).

2007-07-09 Xavier Claessens  <xclaesse@gmail.com>

	* src/empathy.c:
	* libempathy/empathy-debug.c:
	* libempathy/empathy-debug.h: Add EMPATHY_LOGFILE env variable. Fixes
	bug #455240 (Guillaume Desmottes).


svn path=/trunk/; revision=179

2 files changed, 41 insertions, 1 deletions

diff --git a/libempathy/empathy-debug.c b/libempathy/empathy-debug.c
index 2f5658499..c3e5d74b0 100644
--- a/libempathy/empathy-debug.c
+++ b/libempathy/empathy-debug.c
@@ -24,9 +24,15 @@
 
 #include <stdarg.h>
 #include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
 
 #include <glib.h>
 #include <glib/gprintf.h>
+#include <glib/gstdio.h>
 
 /* Set EMPATHY_DEBUG to a colon/comma/space separated list of domains, or "all"
  * to get all debug output.
@@ -90,3 +96,34 @@ empathy_debug_impl (const gchar *domain, const gchar *msg, ...)
 	}
 }
 
+void
+empathy_debug_set_log_file_from_env (void)
+{
+	const gchar *output_file;
+	gint         out;
+
+	output_file = g_getenv ("EMPATHY_LOGFILE");
+	if (output_file == NULL) {
+		return;
+	}
+
+	out = g_open (output_file, O_WRONLY | O_CREAT, 0644);
+	if (out == -1) {
+		g_warning ("Can't open logfile '%s': %s", output_file,
+			   g_strerror (errno));
+		return;
+	}
+
+	if (dup2 (out, STDOUT_FILENO) == -1) {
+		g_warning ("Error when duplicating stdout file descriptor: %s",
+			   g_strerror (errno));
+		return;
+	}
+
+	if (dup2 (out, STDERR_FILENO) == -1) {
+		g_warning ("Error when duplicating stderr file descriptor: %s",
+			   g_strerror (errno));
+		return;
+	}
+}
+
diff --git a/libempathy/empathy-debug.h b/libempathy/empathy-debug.h
index 19d2aa380..fca53f4bd 100644
--- a/libempathy/empathy-debug.h
+++ b/libempathy/empathy-debug.h
@@ -45,7 +45,10 @@ G_BEGIN_DECLS
 #  endif
 #endif
 
-void empathy_debug_impl (const gchar *domain, const gchar *msg, ...);
+void empathy_debug_impl                  (const gchar *domain,
+					  const gchar *msg,
+					  ...);
+void empathy_debug_set_log_file_from_env (void);
 
 G_END_DECLS