From fd2c6b8a4b059bd810ca8511fa8f66001843284c Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Sat, 29 Nov 2014 22:33:30 +0100
Subject: fs/Charset: return Error on SetFSCharset() failure

Don't abort the process, let the caller decide instead.
---
 src/fs/Charset.cxx | 27 +++++++++++++++++++--------
 src/fs/Charset.hxx |  6 ++++--
 src/fs/Config.cxx  | 10 ++++++----
 src/fs/Config.hxx  |  6 ++++--
 4 files changed, 33 insertions(+), 16 deletions(-)

(limited to 'src/fs')

diff --git a/src/fs/Charset.cxx b/src/fs/Charset.cxx
index abf4d8287..113f04cc8 100644
--- a/src/fs/Charset.cxx
+++ b/src/fs/Charset.cxx
@@ -21,9 +21,10 @@
 #include "Charset.hxx"
 #include "Domain.hxx"
 #include "Limits.hxx"
-#include "system/FatalError.hxx"
 #include "Log.hxx"
 #include "Traits.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
 
 #ifdef HAVE_GLIB
 #include <glib.h>
@@ -36,6 +37,8 @@
 
 #ifdef HAVE_GLIB
 
+static constexpr Domain convert_domain("convert");
+
 /**
  * Maximal number of bytes required to represent path name in UTF-8
  * (including nul-terminator).
@@ -50,29 +53,37 @@ static std::string fs_charset;
 
 gcc_pure
 static bool
-IsSupportedCharset(const char *charset)
+CheckCharset(const char *charset, Error &error)
 {
 	/* convert a space to check if the charset is valid */
-	char *test = g_convert(" ", 1, charset, "UTF-8", nullptr, nullptr, nullptr);
-	if (test == nullptr)
+	GError *error2 = nullptr;
+	char *test = g_convert(" ", 1, charset, "UTF-8", nullptr, nullptr, &error2);
+	if (test == nullptr) {
+		error.Set(convert_domain, error2->code, error2->message);
+		g_error_free(error2);
 		return false;
+	}
 
 	g_free(test);
 	return true;
 }
 
-void
-SetFSCharset(const char *charset)
+bool
+SetFSCharset(const char *charset, Error &error)
 {
 	assert(charset != nullptr);
 
-	if (!IsSupportedCharset(charset))
-		FormatFatalError("invalid filesystem charset: %s", charset);
+	if (!CheckCharset(charset, error)) {
+		error.FormatPrefix("Failed to initialize filesystem charset '%s': ",
+				   charset);
+		return false;
+	}
 
 	fs_charset = charset;
 
 	FormatDebug(path_domain,
 		    "SetFSCharset: fs charset is: %s", fs_charset.c_str());
+	return true;
 }
 
 #endif
diff --git a/src/fs/Charset.hxx b/src/fs/Charset.hxx
index 0a71d7c58..5a24e8d4b 100644
--- a/src/fs/Charset.hxx
+++ b/src/fs/Charset.hxx
@@ -25,6 +25,8 @@
 
 #include <string>
 
+class Error;
+
 /**
  * Gets file system character set name.
  */
@@ -32,8 +34,8 @@ gcc_const
 const char *
 GetFSCharset();
 
-void
-SetFSCharset(const char *charset);
+bool
+SetFSCharset(const char *charset, Error &error);
 
 /**
  * Convert the path to UTF-8.
diff --git a/src/fs/Config.cxx b/src/fs/Config.cxx
index 0034ecc61..cf789fcb7 100644
--- a/src/fs/Config.cxx
+++ b/src/fs/Config.cxx
@@ -29,8 +29,8 @@
 #include <glib.h>
 #endif
 
-void
-ConfigureFS()
+bool
+ConfigureFS(Error &error)
 {
 #ifdef HAVE_GLIB
 	const char *charset = nullptr;
@@ -55,7 +55,9 @@ ConfigureFS()
 #endif
 	}
 
-	if (charset != nullptr)
-		SetFSCharset(charset);
+	return charset == nullptr || SetFSCharset(charset, error);
+#else
+	(void)error;
+	return true;
 #endif
 }
diff --git a/src/fs/Config.hxx b/src/fs/Config.hxx
index d4f1709f5..d2cde4a66 100644
--- a/src/fs/Config.hxx
+++ b/src/fs/Config.hxx
@@ -22,10 +22,12 @@
 
 #include "check.h"
 
+class Error;
+
 /**
  * Performs global one-time initialization of this class.
  */
-void
-ConfigureFS();
+bool
+ConfigureFS(Error &error);
 
 #endif
-- 
cgit v1.2.3