hurd: Replace char foo[1024] with string_t

Like already done in various other places and advised by Roland in

https://lists.gnu.org/archive/html/bug-hurd/2012-04/msg00124.html

hurd/hurd/lookup.h

@@ -138,7 +138,7 @@ error_t __hurd_file_name_lookup_retry (error_t (*use_init_port)
 					  string_t retry_name,
 					  mach_port_t *result),
 				       enum retry_type doretry,
-				       char retryname[1024],
+				       string_t retryname,
 				       int flags, mode_t mode,
 				       file_t *result);
 error_t hurd_file_name_lookup_retry (error_t (*use_init_port)
@@ -152,7 +152,7 @@ error_t hurd_file_name_lookup_retry (error_t (*use_init_port)
 					string_t retry_name,
 					mach_port_t *result),
 				     enum retry_type doretry,
-				     char retryname[1024],
+				     string_t retryname,
 				     int flags, mode_t mode,
 				     file_t *result);
 

hurd/hurdlookup.c

@@ -51,7 +51,7 @@ __hurd_file_name_lookup (error_t (*use_init_port)
 {
   error_t err;
   enum retry_type doretry;
-  char retryname[1024];		/* XXX string_t LOSES! */
+  string_t retryname;
   int startport;
 
   error_t lookup_op (mach_port_t startdir)

hurd/lookup-at.c

@@ -40,7 +40,7 @@ __file_name_lookup_at (int fd, int at_flags,
   if (empty != 0 && file_name[0] == '\0')
     {
       enum retry_type doretry;
-      char retryname[1024];	/* XXX string_t LOSES! */
+      string_t retryname;
 
       err = HURD_DPORT_USE (fd, __dir_lookup (port, "", flags, mode,
 					      &doretry, retryname,

hurd/lookup-retry.c

@@ -53,7 +53,7 @@ __hurd_file_name_lookup_retry (error_t (*use_init_port)
 				  retry_type *do_retry, string_t retry_name,
 				  mach_port_t *result),
 			       enum retry_type doretry,
-			       char retryname[1024],
+			       string_t retryname,
 			       int flags, mode_t mode,
 			       file_t *result)
 {

sysdeps/mach/hurd/bind.c

@@ -66,7 +66,7 @@ __bind  (int fd, __CONST_SOCKADDR_ARG addrarg, socklen_t len)
 	  if (! err)
 	    {
 	      enum retry_type doretry;
-	      char retryname[1024];
+	      string_t retryname;
 	      /* Get a port to the ifsock translator.  */
 	      err = __dir_lookup (node, "", 0, 0, &doretry, retryname, &ifsock);
 	      if (! err && (doretry != FS_RETRY_NORMAL || retryname[0] != '\0'))

sysdeps/mach/hurd/dl-sysdep.c

@@ -267,7 +267,7 @@ open_file (const char *file_name, int flags,
 	   mach_port_t *port, struct stat64 *stat)
 {
   enum retry_type doretry;
-  char retryname[1024];		/* XXX string_t LOSES! */
+  string_t retryname;
   file_t startdir;
   error_t err;
 

sysdeps/mach/hurd/fexecve.c

@@ -28,7 +28,7 @@ fexecve (int fd, char *const argv[], char *const envp[])
   file_t file;
   error_t err;
   enum retry_type doretry;
-  char retryname[1024];
+  string_t retryname;
 
   err = HURD_DPORT_USE (fd,
       __dir_lookup (port, "", O_EXEC, 0, &doretry, retryname, &file));

sysdeps/mach/hurd/getlogin.c

@@ -25,7 +25,7 @@
 char *
 getlogin (void)
 {
-  static char login[1024];	/* XXX */
+  static string_t login;
   error_t err;
 
   if (err = __USEPORT (PROC, __proc_getlogin (port, login)))

sysdeps/mach/hurd/readlinkat.c

@@ -32,7 +32,7 @@ __readlinkat (int fd, const char *file_name, char *buf, size_t len)
   file_t file_stat;
   struct stat64 st;
   enum retry_type doretry;
-  char retryname[1024];
+  string_t retryname;
   file_t file;
   char *rbuf = buf;
   mach_msg_type_number_t nread = len;

sysdeps/mach/hurd/ttyname.c

@@ -27,7 +27,7 @@ char *
 ttyname (int fd)
 {
   error_t err;
-  static char nodename[1024];	/* XXX */
+  static string_t nodename;
 
   if (err = HURD_DPORT_USE (fd, __term_get_nodename (port, nodename)))
     {

sysdeps/mach/hurd/ttyname_r.c

@@ -28,7 +28,7 @@ int
 __ttyname_r (int fd, char *buf, size_t buflen)
 {
   error_t err;
-  char nodename[1024];	/* XXX */
+  string_t nodename;
   size_t len;
 
   if (err = HURD_DPORT_USE (fd, __term_get_nodename (port, nodename)))