have update process ignore signals when writing db

git-svn-id: https://svn.musicpd.org/mpd/trunk@735 09075e82-0dd4-0310-85a5-a0d7c8717e4f

3 files changed, 21 insertions, 0 deletions

diff --git a/src/directory.c b/src/directory.c
index 8f2765d26..370744aae 100644
--- a/src/directory.c
+++ b/src/directory.c
@@ -150,6 +150,8 @@ int updateInit(FILE * fp, List * pathList) {
 	directory_updatePid = fork();
        	if(directory_updatePid==0) {
               	/* child */
+		struct sigaction sa;
+		
 		clearPlayerPid();
 	
 		unblockSignals();
@@ -186,6 +188,8 @@ int updateInit(FILE * fp, List * pathList) {
 			}
 		}
 		else if(updateDirectory(mp3rootDirectory)<0) exit(EXIT_FAILURE);
+		/* ignore signals since we don't want them to corrupt the db*/
+		ignoreSignals();
 		if(writeDirectoryDB()<0) {
 			ERROR("problems writing music db file, \"%s\"\n",
 					directorydb);
@@ -684,6 +688,7 @@ int writeDirectoryDB() {
 	while(!(fp=fopen(directorydb,"w")) && errno==EINTR);
 	if(!fp) return -1;
 
+	/* block signals when writing the db so we don't get a corrupted db*/
 	myfprintf(fp,"%s\n",DIRECTORY_INFO_BEGIN);
 	myfprintf(fp,"%s%s\n",DIRECTORY_MPD_VERSION,VERSION);
 	myfprintf(fp,"%s%s\n",DIRECTORY_FS_CHARSET,getFsCharset());
diff --git a/src/sig_handlers.c b/src/sig_handlers.c
index 84ca8b78e..eb39e9719 100644
--- a/src/sig_handlers.c
+++ b/src/sig_handlers.c
@@ -83,6 +83,20 @@ void finishSigHandlers() {
         signal_unhandle(SIGHUP);
 }
 
+void ignoreSignals() {
+	struct sigaction sa;
+
+	sa.sa_flags = 0;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_handler = SIG_IGN;
+	while(sigaction(SIGPIPE,&sa,NULL)<0 && errno==EINTR);
+	while(sigaction(SIGCHLD,&sa,NULL)<0 && errno==EINTR);
+	while(sigaction(SIGUSR1,&sa,NULL)<0 && errno==EINTR);
+	while(sigaction(SIGINT,&sa,NULL)<0 && errno==EINTR);
+	while(sigaction(SIGTERM,&sa,NULL)<0 && errno==EINTR);
+	while(sigaction(SIGHUP,&sa,NULL)<0 && errno==EINTR);
+}
+
 void blockSignals() {
 	sigset_t sset;
 
diff --git a/src/sig_handlers.h b/src/sig_handlers.h
index 415b15b45..6c5af549b 100644
--- a/src/sig_handlers.h
+++ b/src/sig_handlers.h
@@ -27,6 +27,8 @@ void initSigHandlers();
 
 void finishSigHandlers();
 
+void ignoreSignals();
+
 void blockSignals();
 
 void unblockSignals();