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, 202 insertions, 0 deletions

diff --git a/REORG.TODO/elf/sln.c b/REORG.TODO/elf/sln.c
new file mode 100644
index 0000000000..af2d0de164
--- /dev/null
+++ b/REORG.TODO/elf/sln.c
@@ -0,0 +1,202 @@
+/* `sln' program to create symbolic links between files.
+   Copyright (C) 1998-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <error.h>
+#include <errno.h>
+#include <libintl.h>
+#include <locale.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <errno.h>
+#include <ctype.h>
+#include <stdio.h>
+#include <string.h>
+#include <limits.h>
+
+#include "../version.h"
+
+#define PACKAGE _libc_intl_domainname
+
+static int makesymlink (const char *src, const char *dest);
+static int makesymlinks (const char *file);
+static void usage (void);
+
+int
+main (int argc, char **argv)
+{
+  /* Set locale via LC_ALL.  */
+  setlocale (LC_ALL, "");
+
+  /* Set the text message domain.  */
+  textdomain (PACKAGE);
+
+  switch (argc)
+    {
+    case 2:
+      if (strcmp (argv[1], "--version") == 0) {
+	printf ("sln %s%s\n", PKGVERSION, VERSION);
+	return 0;
+      } else if (strcmp (argv[1], "--help") == 0) {
+	usage ();
+	return 0;
+      }
+      return makesymlinks (argv [1]);
+      break;
+
+    case 3:
+      return makesymlink (argv [1], argv [2]);
+      break;
+
+    default:
+      usage ();
+      return 1;
+      break;
+    }
+}
+
+static void
+usage (void)
+{
+  printf (_("Usage: sln src dest|file\n\n"));
+  printf (_("For bug reporting instructions, please see:\n\
+%s.\n"), REPORT_BUGS_TO);
+}
+
+static int
+makesymlinks (const char *file)
+{
+  char *buffer = NULL;
+  size_t bufferlen = 0;
+  int ret;
+  int lineno;
+  FILE *fp;
+
+  if (strcmp (file, "-") == 0)
+    fp = stdin;
+  else
+    {
+      fp = fopen (file, "r");
+      if (fp == NULL)
+	{
+	  fprintf (stderr, _("%s: file open error: %m\n"), file);
+	  return 1;
+	}
+    }
+
+  ret = 0;
+  lineno = 0;
+  while (!feof_unlocked (fp))
+    {
+      ssize_t n = getline (&buffer, &bufferlen, fp);
+      char *src;
+      char *dest;
+      char *cp = buffer;
+
+      if (n < 0)
+	break;
+      if (buffer[n - 1] == '\n')
+	buffer[n - 1] = '\0';
+
+      ++lineno;
+      while (isspace (*cp))
+	++cp;
+      if (*cp == '\0')
+	/* Ignore empty lines.  */
+	continue;
+      src = cp;
+
+      do
+	++cp;
+      while (*cp != '\0' && ! isspace (*cp));
+      if (*cp != '\0')
+	*cp++ = '\0';
+
+      while (isspace (*cp))
+	++cp;
+      if (*cp == '\0')
+	{
+	  fprintf (stderr, _("No target in line %d\n"), lineno);
+	  ret = 1;
+	  continue;
+	}
+      dest = cp;
+
+      do
+	++cp;
+      while (*cp != '\0' && ! isspace (*cp));
+      if (*cp != '\0')
+	*cp++ = '\0';
+
+      ret |= makesymlink (src, dest);
+    }
+  fclose (fp);
+
+  return ret;
+}
+
+static int
+makesymlink (const char *src, const char *dest)
+{
+  struct stat64 stats;
+  const char *error;
+
+  /* Destination must not be a directory. */
+  if (lstat64 (dest, &stats) == 0)
+    {
+      if (S_ISDIR (stats.st_mode))
+	{
+	  fprintf (stderr, _("%s: destination must not be a directory\n"),
+		   dest);
+	  return 1;
+	}
+      else if (unlink (dest) && errno != ENOENT)
+	{
+	  fprintf (stderr, _("%s: failed to remove the old destination\n"),
+		   dest);
+	  return 1;
+	}
+    }
+  else if (errno != ENOENT)
+    {
+      error = strerror (errno);
+      fprintf (stderr, _("%s: invalid destination: %s\n"), dest, error);
+      return -1;
+    }
+
+  if (symlink (src, dest) == 0)
+    {
+      /* Destination must exist by now. */
+      if (access (dest, F_OK))
+        {
+	  error = strerror (errno);
+	  unlink (dest);
+	  fprintf (stderr, _("Invalid link from \"%s\" to \"%s\": %s\n"),
+		   src, dest, error);
+	  return 1;
+	}
+      return 0;
+    }
+  else
+    {
+      error = strerror (errno);
+      fprintf (stderr, _("Invalid link from \"%s\" to \"%s\": %s\n"),
+	       src, dest, error);
+      return 1;
+    }
+}