Fix locking

 -Erik

1 files changed, 25 insertions, 11 deletions

diff --git a/libc/pwd_grp/fgetspent.c b/libc/pwd_grp/fgetspent.c
index 68053b39e..20698da1b 100644
--- a/libc/pwd_grp/fgetspent.c
+++ b/libc/pwd_grp/fgetspent.c
@@ -17,27 +17,41 @@
  *
  */
 
+#include <features.h>
 #include <errno.h>
 #include <stdio.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 fgetspent_r (FILE *file, struct spwd *spwd,
 	char *buff, size_t buflen, struct spwd **crap)
 {
-	if (file == NULL) {
-		__set_errno(EINTR);
-		return -1;
-	}
-	return(__getspent_r(spwd, buff, buflen, fileno(file)));
+    if (file == NULL) {
+	__set_errno(EINTR);
+	return -1;
+    }
+    return(__getspent_r(spwd, buff, buflen, fileno(file)));
 }
 
 struct spwd *fgetspent(FILE * file)
 {
-	static char line_buff[PWD_BUFFER_SIZE];
-	static struct spwd spwd;
+    static char line_buff[PWD_BUFFER_SIZE];
+    static struct spwd spwd;
 
-	if (fgetspent_r(file, &spwd, line_buff, sizeof(line_buff), NULL) != -1) {
-		return &spwd;
-	}
-	return NULL;
+    LOCK;
+    if (fgetspent_r(file, &spwd, line_buff, sizeof(line_buff), NULL) != -1) {
+	UNLOCK;
+	return &spwd;
+    }
+    UNLOCK;
+    return NULL;
 }