changeset 1603:51b7d1af353b draft

here's a patch that should let us replace toolbox's chcon. (it also adds a feature, -R, because toybox makes that so easy.) you'll probably want fancier configuration here because although the --as-needed works okay, a typical Ubuntu box will have the .so but not the .h files. i did consider adding a toys/selinux/ directory, but given that existing tools like ls and id will want -Z SELinux options, i wasn't sure whether you'd think it was worth segregating the SELinux-only toys. note that this won't help the tizen smack users (and patch for smack won't help SELinux users). so you might want to think about where you'd like us to be aiming: #if USE_SELINUX/USE_SMACK in all the relevant places, or a toys/selinux and a toys/smack (though we'd still need #if in at least ls and id), or a lib/security.c that concentrates all the differences into one file?
author Elliott Hughes <enh@google.com>
date Thu, 11 Dec 2014 20:17:28 -0600
parents ea86581a9e36
children f057223498e4
files scripts/make.sh toys/pending/chcon.c
diffstat 2 files changed, 52 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/scripts/make.sh	Wed Dec 10 18:59:22 2014 -0600
+++ b/scripts/make.sh	Thu Dec 11 20:17:28 2014 -0600
@@ -89,7 +89,7 @@
   # for it.
 
   > generated/optlibs.dat
-  for i in util crypt m resolv
+  for i in util crypt m resolv selinux
   do
     echo "int main(int argc, char *argv[]) {return 0;}" | \
     ${CROSS_COMPILE}${CC} $CFLAGS -xc - -o /dev/null -Wl,--as-needed -l$i > /dev/null 2>/dev/null &&
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/toys/pending/chcon.c	Thu Dec 11 20:17:28 2014 -0600
@@ -0,0 +1,51 @@
+/* chcon.c - Change file security context
+ *
+ * Copyright 2014 The Android Open Source Project
+
+USE_CHCON(NEWTOY(chcon, "hRv", TOYFLAG_USR|TOYFLAG_BIN))
+
+config CHCON
+  bool "chcon"
+  default n
+  help
+    usage: chcon [-hRv] CONTEXT FILE...
+
+    Change the SELinux security context of listed file[s] (recursively with -R).
+
+    -h change symlinks instead of what they point to.
+    -R recurse into subdirectories.
+    -v verbose output.
+*/
+
+#define FOR_chcon
+#include "toys.h"
+#include <selinux/selinux.h>
+
+GLOBALS(
+  char *context;
+)
+
+int do_chcon(struct dirtree *try)
+{
+  int ret;
+
+  if (!dirtree_notdotdot(try)) return 0;
+
+  char *path = dirtree_path(try, 0);
+  if (toys.optflags & FLAG_v)
+    printf("chcon '%s' to %s\n", path, TT.context);
+  ret = ((toys.optflags&FLAG_h) ? lsetfilecon : setfilecon)(path, TT.context);
+  if (ret == -1)
+    perror_msg("'%s' to %s", path, TT.context);
+  free(path);
+
+  return (toys.optflags & FLAG_R) ? DIRTREE_RECURSE : 0;
+}
+
+void chcon_main(void)
+{
+  TT.context = *toys.optargs;
+  char **file;
+
+  for (file = toys.optargs+1; *file; file++) dirtree_read(*file, do_chcon);
+}