1 files changed, 91 insertions, 0 deletions
diff --git a/package/mpd/patches/patch-src_db_SimpleDatabasePlugin_cxx b/package/mpd/patches/patch-src_db_SimpleDatabasePlugin_cxx
new file mode 100644
index 000000000..0f28de720
--- /dev/null
+++ b/package/mpd/patches/patch-src_db_SimpleDatabasePlugin_cxx
@@ -0,0 +1,91 @@
+--- mpd-0.18.5.orig/src/db/SimpleDatabasePlugin.cxx	2013-11-22 00:33:30.000000000 +0100
++++ mpd-0.18.5/src/db/SimpleDatabasePlugin.cxx	2013-11-30 19:17:55.000000000 +0100
+@@ -35,6 +35,9 @@
+ 
+ #include <sys/types.h>
+ #include <errno.h>
++#include <sys/mount.h> 
++#include <mntent.h>
++#include <string.h>
+ 
+ static constexpr Domain simple_db_domain("simple_db");
+ 
+@@ -95,8 +98,8 @@ SimpleDatabase::Check(Error &error) cons
+ 			return false;
+ 		}
+ 
+-		/* Check if we can write to the directory */
+-		if (!CheckAccess(dirPath, X_OK | W_OK)) {
++		/* Check if we can change into the directory */
++		if (!CheckAccess(dirPath, X_OK)) {
+ 			const int e = errno;
+ 			const std::string dirPath_utf8 = dirPath.ToUTF8();
+ 			error.FormatErrno(e, "Can't create db file in \"%s\"",
+@@ -122,9 +125,9 @@ SimpleDatabase::Check(Error &error) cons
+ 		return false;
+ 	}
+ 
+-	/* And check that we can write to it */
+-	if (!CheckAccess(path, R_OK | W_OK)) {
+-		error.FormatErrno("Can't open db file \"%s\" for reading/writing",
++	/* And check that we can read it */
++	if (!CheckAccess(path, R_OK)) {
++		error.FormatErrno("Can't open db file \"%s\" for reading",
+ 				  path_utf8.c_str());
+ 		return false;
+ 	}
+@@ -281,6 +284,10 @@ SimpleDatabase::GetStats(const DatabaseS
+ bool
+ SimpleDatabase::Save(Error &error)
+ {
++	struct mntent *mnt;
++	int remount;
++	FILE *f;
++
+ 	db_lock();
+ 
+ 	LogDebug(simple_db_domain, "removing empty directories from DB");
+@@ -293,6 +300,26 @@ SimpleDatabase::Save(Error &error)
+ 
+ 	LogDebug(simple_db_domain, "writing DB");
+ 
++	remount = 0;
++	/* check if /data is mounted read-only */
++	if ((f = setmntent("/proc/mounts", "r")) == NULL)
++		error.Format(simple_db_domain, "Checking /proc/mounts failed");
++
++	while ((mnt = getmntent(f)) != NULL) {
++		if (strcmp(mnt->mnt_dir, "/data") == 0 &&
++			hasmntopt(mnt, MNTOPT_RO) != NULL) {
++			remount = 1;
++		}
++	}
++	endmntent(f);
++
++	if (remount) {		
++		if (mount("","/data",0,MS_REMOUNT,0)<0) {
++			error.Format(simple_db_domain, "Remounting /data rw failed");
++		}
++		LogDebug(simple_db_domain, "Mounted /data successfully in read-write mode"); 
++	}
++
+ 	FILE *fp = FOpen(path, FOpenMode::WriteText);
+ 	if (!fp) {
+ 		error.FormatErrno("unable to write to db file \"%s\"",
+@@ -310,6 +337,16 @@ SimpleDatabase::Save(Error &error)
+ 
+ 	fclose(fp);
+ 
++	if (remount) {
++		sync();
++		if (mount("","/data",0,MS_REMOUNT|MS_RDONLY,0)<0) {
++			error.Format(simple_db_domain, "Remounting /data ro failed");
++		}
++		LogDebug(simple_db_domain, "Mounted /data successfully in read-only mode");
++	}
++
++	LogDebug(simple_db_domain, "Successfully written database");	
++
+ 	struct stat st;
+ 	if (StatFile(path, st))
+ 		mtime = st.st_mtime;