gz_open and gz_close were left in, even when BB_FEATURE_TAR_GZIP was disabled.

[oweals/busybox.git] / pivot_root.c

diff --git a/pivot_root.c b/pivot_root.c
index e0071014888f525870f8531e4218a496a098909a..4d7f8a3d10da4841fe4faa77422d0f61a3b83ba0 100644 (file)
--- a/pivot_root.c
+++ b/pivot_root.c
@@ -3,18 +3,35 @@
  * pivot_root.c - Change root file system.  Based on util-linux 2.10s
  *
  * busyboxed by Evin Robertson
+ * pivot_root syscall stubbed by Erik Andersen, so it will compile
+ *     regardless of the kernel being used. 
  */
-#include "busybox.h"
 #include <stdlib.h>
 #include <stdio.h>
+#include <errno.h>
 #include <sys/syscall.h>
 #include <linux/unistd.h>
+#include "busybox.h"
 
 #ifndef __NR_pivot_root
-#error Sorry, but this kernel does not support the pivot_root syscall
+#warning This kernel does not support the pivot_root syscall
+#warning The pivot_root system call is being stubbed out...
+int pivot_root(const char * new_root,const char * put_old)
+{
+       /* BusyBox was compiled against a kernel that did not support
+        *  the pivot_root system call.  To make this application work,
+        *  you will need to recompile with a kernel supporting the
+        *  pivot_root system call.
+        */
+       fprintf(stderr, "\n\nTo make this application work, you will need to recompile\n");
+       fprintf(stderr, "with a kernel supporting the pivot_root system call. -Erik\n\n");
+       errno=ENOSYS;
+       return -1;
+}
+#else
+static _syscall2(int,pivot_root,const char *,new_root,const char *,put_old)
 #endif
 
-static _syscall2(int,pivot_root,const char *,new_root,const char *,put_old)
 
 
 int pivot_root_main(int argc, char **argv)
@@ -22,8 +39,8 @@ int pivot_root_main(int argc, char **argv)
     if (argc != 3)
         show_usage();
 
-    if (pivot_root(argv[1],argv[2]) < 0)
-        perror_msg_and_die("pivot_root");
+       if (pivot_root(argv[1],argv[2]) < 0)
+               perror_msg_and_die("pivot_root");
 
     return EXIT_SUCCESS;