Fix locking

 -Erik

1 files changed, 14 insertions, 0 deletions

diff --git a/libc/pwd_grp/getpwnam.c b/libc/pwd_grp/getpwnam.c
index b0674b15d..00adb57ca 100644
--- a/libc/pwd_grp/getpwnam.c
+++ b/libc/pwd_grp/getpwnam.c
@@ -18,6 +18,7 @@
  *
  */
 
+#include <features.h>
 #include <unistd.h>
 #include <string.h>
 #include <errno.h>
@@ -25,6 +26,16 @@
 #include <paths.h>
 #include "config.h"
 
+#ifdef __UCLIBC_HAS_THREADS__
+#include <pthread.h>
+static pthread_mutex_t mylock = PTHREAD_MUTEX_INITIALIZER;
+# define LOCK   pthread_mutex_lock(&mylock)
+# define UNLOCK pthread_mutex_unlock(&mylock);
+#else       
+# define LOCK
+# define UNLOCK
+#endif      
+
 int getpwnam_r (const char *name, struct passwd *password,
 	char *buff, size_t buflen, struct passwd **crap)
 {
@@ -53,9 +64,12 @@ struct passwd *getpwnam(const char *name)
     static char line_buff[PWD_BUFFER_SIZE];
     static struct passwd pwd;
 
+    LOCK;
     if (getpwnam_r(name, &pwd, line_buff, sizeof(line_buff), NULL) != -1) {
+	UNLOCK;
 	return &pwd;
     }
+    UNLOCK;
     return NULL;
 }