initial commit

1 files changed, 24 insertions, 0 deletions

diff --git a/src/minutils/s6-pivotchroot.c b/src/minutils/s6-pivotchroot.c
new file mode 100644
index 0000000..ee4db73
--- /dev/null
+++ b/src/minutils/s6-pivotchroot.c
@@ -0,0 +1,24 @@
+/* ISC license. */
+
+#ifndef _BSD_SOURCE
+#define _BSD_SOURCE
+#endif
+
+#include <unistd.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+
+#define USAGE "s6-pivotchroot old-place-for-new-root new-place-for-old-root prog..."
+
+extern int pivot_root (char const *, char const *) ;
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  PROG = "s6-pivotchroot" ;
+  if (argc < 4) strerr_dieusage(100, USAGE) ;
+  if (chdir(argv[1]) < 0) strerr_diefu2sys(111, "chdir to ", argv[1]) ;
+  if (pivot_root(".", argv[2]) < 0) strerr_diefu1sys(111, "pivot_root") ;
+  if (chroot(".") < 0) strerr_diefu1sys(111, "chroot") ;
+  pathexec_run(argv[3], argv+3, envp) ;
+  strerr_dieexec(111, argv[3]) ;
+}