shmctl shouldn't create shared memory itself

git-svn-id: http://opensvn.csie.org/pttbbs/pttbbs/trunk/pttbbs@86 63ad8ddf-47c3-0310-b6dd-a9e9d9715204

1 files changed, 7 insertions, 0 deletions

diff --git a/util/shmctl.c b/util/shmctl.c
index 9c458e7d..6a0ea764 100644
--- a/util/shmctl.c
+++ b/util/shmctl.c
@@ -6,6 +6,7 @@
 #include <signal.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/shm.h>
 #include "config.h"
 #include "pttstruct.h"
 #include "util.h"
@@ -219,6 +220,12 @@ int main(int argc, char **argv)
     int     i = 0;
 	
     if( argc >= 2 ){
+	/* shmctl shouldn't create shm itself */
+	int     shmid = shmget(UHASH_KEY, sizeof(*utmpshm), 0);
+	if( shmid < 0 ){
+	    perror("attach utmpshm");
+	    return 1;
+	}
 	chdir(BBSHOME);
 	resolve_utmp();
 	resolve_boards();