Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 120 insertions, 0 deletions

diff --git a/REORG.TODO/io/ftwtest.c b/REORG.TODO/io/ftwtest.c
new file mode 100644
index 0000000000..77debd2805
--- /dev/null
+++ b/REORG.TODO/io/ftwtest.c
@@ -0,0 +1,120 @@
+#include <ftw.h>
+#include <getopt.h>
+#include <mcheck.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+
+int do_depth;
+int do_chdir;
+int do_phys;
+int do_exit;
+char *skip_subtree;
+char *skip_siblings;
+
+struct option options[] =
+{
+  { "depth", no_argument, &do_depth, 1 },
+  { "chdir", no_argument, &do_chdir, 1 },
+  { "phys", no_argument, &do_phys, 1 },
+  { "skip-subtree", required_argument, NULL, 't' },
+  { "skip-siblings", required_argument, NULL, 's' },
+  { "early-exit", no_argument, &do_exit, 1 },
+  { NULL, 0, NULL, 0 }
+};
+
+const char *flag2name[] =
+{
+  [FTW_F] = "FTW_F",
+  [FTW_D] = "FTW_D",
+  [FTW_DNR] = "FTW_DNR",
+  [FTW_NS] = "FTW_NS",
+  [FTW_SL] = "FTW_SL",
+  [FTW_DP] = "FTW_DP",
+  [FTW_SLN] = "FTW_SLN"
+};
+
+
+static int
+cb (const char *name, const struct stat *st, int flag, struct FTW *f)
+{
+  if (do_exit && strcmp (name + f->base, "file@2"))
+    return FTW_CONTINUE;
+
+  printf ("base = \"%.*s\", file = \"%s\", flag = %s",
+	  f->base, name, name + f->base, flag2name[flag]);
+  if (do_chdir)
+    {
+      char *cwd = getcwd (NULL, 0);
+      printf (", cwd = %s", cwd);
+      free (cwd);
+    }
+  printf (", level = %d\n", f->level);
+
+  if (skip_siblings && strcmp (name + f->base, skip_siblings) == 0)
+    return FTW_SKIP_SIBLINGS;
+
+  if (skip_subtree && strcmp (name + f->base, skip_subtree) == 0)
+    return FTW_SKIP_SUBTREE;
+
+  return do_exit ? 26 : FTW_CONTINUE;
+}
+
+int
+main (int argc, char *argv[])
+{
+  int opt;
+  int r;
+  int flag = 0;
+  mtrace ();
+
+  while ((opt = getopt_long_only (argc, argv, "", options, NULL)) != -1)
+    {
+      if (opt == 't')
+        skip_subtree = optarg;
+      else if (opt == 's')
+        skip_siblings = optarg;
+    }
+
+  if (do_chdir)
+    flag |= FTW_CHDIR;
+  if (do_depth)
+    flag |= FTW_DEPTH;
+  if (do_phys)
+    flag |= FTW_PHYS;
+  if (skip_subtree || skip_siblings)
+    {
+      flag |= FTW_ACTIONRETVAL;
+      if (do_exit)
+	{
+	  printf ("--early-exit cannot be used together with --skip-{siblings,subtree}");
+	  exit (1);
+	}
+    }
+
+  char *cw1 = getcwd (NULL, 0);
+
+  r = nftw (optind < argc ? argv[optind] : ".", cb, do_exit ? 1 : 3, flag);
+  if (r < 0)
+    perror ("nftw");
+
+  char *cw2 = getcwd (NULL, 0);
+
+  if (strcmp (cw1, cw2) != 0)
+    {
+      printf ("current working directory before and after nftw call differ:\n"
+	      "before: %s\n"
+	      "after:  %s\n", cw1, cw2);
+      exit (1);
+    }
+
+  if (do_exit)
+    {
+      puts (r == 26 ? "succeeded" : "failed");
+      return r == 26 ? 0 : 1;
+    }
+  return r;
+}