From 03d8740213e324efaf7b774b0c7497ced2fa626b Mon Sep 17 00:00:00 2001
From: Matthew Barnes <mbarnes@src.gnome.org>
Date: Mon, 16 Feb 2009 00:44:40 +0000
Subject: Move signature script execution to e-util/e-signature-utils.s so the
 composer can invoke it.  Composer no longer needs mail-config.h.

Split signature preview into a new widget: ESignaturePreview.


svn path=/branches/kill-bonobo/; revision=37272
---
 e-util/e-signature-utils.c | 130 +++++++++++++++++++++++++++++++++++++++++++++
 e-util/e-signature-utils.h |   1 +
 2 files changed, 131 insertions(+)

(limited to 'e-util')

diff --git a/e-util/e-signature-utils.c b/e-util/e-signature-utils.c
index 5565ef9faf..0114ce6e06 100644
--- a/e-util/e-signature-utils.c
+++ b/e-util/e-signature-utils.c
@@ -29,6 +29,10 @@
 #include <camel/camel-mime-filter-charset.h>
 #include <camel/camel-mime-filter-tohtml.h>
 
+#ifndef G_OS_WIN32
+#include <sys/wait.h>
+#endif
+
 #include "e-util/e-util.h"
 
 static ESignatureList *global_signature_list;
@@ -215,3 +219,129 @@ e_read_signature_file (ESignature *signature,
 
 	return content;
 }
+
+gchar *
+e_run_signature_script (const gchar *filename)
+{
+	/* FIXME Make this cross-platform, prefer GLib functions over
+	 *       POSIX, and report errors via GError instead of dumping
+	 *       messages to the terminal where users won't see them. */
+
+#ifndef G_OS_WIN32
+	gint in_fds[2];
+	pid_t pid;
+
+	g_return_val_if_fail (filename != NULL, NULL);
+
+	if (pipe (in_fds) == -1) {
+		g_warning (
+			"Failed to create pipe to '%s': %s",
+			filename, g_strerror (errno));
+		return NULL;
+	}
+
+	pid = fork ();
+
+	/* Child Process */
+	if (pid == 0) {
+		gint maxfd, ii;
+
+		close (in_fds[0]);
+		if (dup2 (in_fds[1], STDOUT_FILENO) < 0)
+			_exit (255);
+		close (in_fds[1]);
+
+		setsid ();
+
+		maxfd = sysconf (_SC_OPEN_MAX);
+		for (ii = 3; ii < maxfd; ii++) {
+			if (ii == STDIN_FILENO)
+				continue;
+			if (ii == STDOUT_FILENO)
+				continue;
+			if (ii == STDERR_FILENO)
+				continue;
+			fcntl (ii, F_SETFD, FD_CLOEXEC);
+		}
+
+		execlp ("/bin/sh", "/bin/sh", "-c", filename, NULL);
+
+		g_warning (
+			"Could not execute '%s': %s",
+			filename, g_strerror (errno));
+
+		_exit (255);
+
+	/* Parent Process */
+	} else if (pid > 0) {
+		CamelStream *output_stream;
+		CamelStream *input_stream;
+		GByteArray *buffer;
+		gchar *content;
+		gsize length;
+		gint result;
+		gint status;
+
+		close (in_fds[1]);
+
+		buffer = g_byte_array_new ();
+		output_stream = camel_stream_mem_new ();
+		camel_stream_mem_set_byte_array (
+			CAMEL_STREAM_MEM (output_stream), buffer);
+
+		input_stream = camel_stream_fs_new_with_fd (in_fds[0]);
+		camel_stream_write_to_stream (input_stream, output_stream);
+		camel_object_unref (input_stream);
+
+		camel_object_unref (output_stream);
+
+		/* Make sure the buffer is nul-terminated. */
+		length = (gsize) buffer->len;
+		g_byte_array_append (buffer, (guchar *) "", 1);
+		content = (gchar *) g_byte_array_free (buffer, FALSE);
+
+		/* Signature scripts are supposed to generate UTF-8 content,
+		 * but because users are known to never read the manual, we
+		 * try to do our best if the content isn't valid UTF-8 by
+		 * assuming that the content is in the user's locale
+		 * character set. */
+		if (!g_utf8_validate (content, length, NULL)) {
+			gchar *utf8;
+
+			/* XXX Should pass a GError here. */
+			utf8 = g_locale_to_utf8 (
+				content, length, NULL, NULL, NULL);
+			g_free (content);
+			content = utf8;
+		}
+
+		/* Wait for the script process to terminate. */
+		result = waitpid (pid, &status, 0);
+
+		if (result == -1 && errno == EINTR) {
+			/* Child process is hanging... */
+			kill (pid, SIGTERM);
+			sleep (1);
+			result = waitpid (pid, &status, WNOHANG);
+			if (result == 0) {
+				/* ...still hanging, set phasers to KILL. */
+				kill (pid, SIGKILL);
+				sleep (1);
+				result = waitpid (pid, &status, WNOHANG);
+			}
+		}
+
+		return content;
+
+	/* Forking Failed */
+	} else {
+		g_warning (
+			"Failed to create child process '%s': %s",
+			filename, g_strerror (errno));
+		close (in_fds[0]);
+		close (in_fds[1]);
+	}
+#endif
+
+	return NULL;
+}
diff --git a/e-util/e-signature-utils.h b/e-util/e-signature-utils.h
index d4fdfd97f4..41472f45d0 100644
--- a/e-util/e-signature-utils.h
+++ b/e-util/e-signature-utils.h
@@ -33,6 +33,7 @@ gchar *		e_create_signature_file		(GError **error);
 gchar *		e_read_signature_file		(ESignature *signature,
 						 gboolean convert_to_html,
 						 GError **error);
+gchar *		e_run_signature_script		(const gchar *filename);
 
 G_END_DECLS
 
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