Libc-391.4.3.tar.gz

[apple/libc.git] / gen / devname.c

diff --git a/gen/devname.c b/gen/devname.c
index d7132ce8fb86fdbe017c8f7b8c43b0785ca31f96..7774a82535421fa4846d58dc830fc2299dc2e133 100644 (file)
--- a/gen/devname.c
+++ b/gen/devname.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1999, 2004 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
@@ -68,37 +68,47 @@
 #include <stdlib.h>
 
 char *
-devname(dev, type)
-       dev_t dev;
-       mode_t type;
+devname_r(dev_t dev, mode_t type, char *buf, int len)
 {
        register DIR *dp;
        register struct dirent *dirp;
        struct stat sb;
-       static char *buf = NULL;
+       char _buf[sizeof(_PATH_DEV) + MAXNAMLEN];
 
-       if( buf == NULL ) {
-               buf = malloc(sizeof(_PATH_DEV) + MAXNAMLEN);
-               if( buf == NULL )
-                       return NULL;
-               strcpy(buf, _PATH_DEV);
-       }
+       strcpy(_buf, _PATH_DEV);
 
        if ((dp = opendir(_PATH_DEV)) == NULL) 
                return (NULL);
 
        while ( (dirp = readdir(dp)) ) {
-               bcopy(dirp->d_name, buf + sizeof(_PATH_DEV) - 1,
+               bcopy(dirp->d_name, _buf + sizeof(_PATH_DEV) - 1,
                    dirp->d_namlen + 1);
-               if (stat(buf, &sb))
+               if (lstat(_buf, &sb))
                        continue;
                if (dev != sb.st_rdev)
                        continue;
                if (type != (sb.st_mode & S_IFMT))
                        continue;
+               if (dirp->d_namlen + 1 > len)
+                       break;
+               strcpy(buf, dirp->d_name);
                (void)closedir(dp);
-               return (buf + sizeof(_PATH_DEV) - 1);
+               return (buf);
        }
        (void)closedir(dp);
        return (NULL);
 }
+
+char *
+devname(dev_t dev, mode_t type)
+{
+       static char *buf = NULL;
+
+       if( buf == NULL ) {
+               buf = malloc(MAXNAMLEN);
+               if( buf == NULL )
+                       return NULL;
+       }
+
+       return (devname_r(dev, type, buf, MAXNAMLEN));
+}