Implement FTP backend and other code cleanups.

[cumulus.git] / store.cc

diff --git a/store.cc b/store.cc
index 00d0878..aa69d9e 100644 (file)
--- a/store.cc
+++ b/store.cc
@@ -1,13 +1,31 @@
-/* LBS: An LFS-inspired filesystem backup system
- * Copyright (C) 2008  Michael Vrable
+/* Cumulus: Smart Filesystem Backup to Dumb Servers
  *
- * Backup data is stored in a collection of objects, which are grouped together
+ * Copyright (C) 2008  The Regents of the University of California
+ * Written by Michael Vrable <mvrable@cs.ucsd.edu>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* Backup data is stored in a collection of objects, which are grouped together
  * into segments for storage purposes.  This implementation of the object store
  * represents segments as TAR files and objects as files within them. */
 
 #include <assert.h>
 #include <errno.h>
 #include <stdio.h>
+#include <string.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/resource.h>
@@ -25,6 +43,7 @@
 
 #include "store.h"
 #include "ref.h"
+#include "util.h"
 
 using std::max;
 using std::list;
@@ -37,16 +56,6 @@ using std::string;
 const char *filter_program = "bzip2 -c";
 const char *filter_extension = ".bz2";
 
-static void cloexec(int fd)
-{
-    long flags = fcntl(fd, F_GETFD);
-
-    if (flags < 0)
-        return;
-
-    fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
-}
-
 Tarfile::Tarfile(RemoteFile *file, const string &segment)
     : size(0),
       segment_name(segment)
@@ -68,14 +77,14 @@ Tarfile::~Tarfile()
     tar_write(buf, TAR_BLOCK_SIZE);
 
     if (close(filter_fd) != 0)
-        throw IOException("Error closing Tarfile");
+        fatal("Error closing Tarfile");
 
     /* ...and wait for filter process to finish. */
     int status;
     waitpid(filter_pid, &status, 0);
 
     if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
-        throw IOException("Filter process error");
+        fatal("Filter process error");
     }
 
     close(real_fd);
@@ -92,13 +101,13 @@ int spawn_filter(int fd_out, const char *program, pid_t *filter_pid)
 
     /* Create a pipe for communicating with the filter process. */
     if (pipe(fds) < 0) {
-        throw IOException("Unable to create pipe for filter");
+        fatal("Unable to create pipe for filter");
     }
 
     /* Create a child process which can exec() the filter program. */
     pid = fork();
     if (pid < 0)
-        throw IOException("Unable to fork filter process");
+        fatal("Unable to fork filter process");
 
     if (pid > 0) {
         /* Parent process */
@@ -141,7 +150,7 @@ void Tarfile::tar_write(const char *data, size_t len)
             if (errno == EINTR)
                 continue;
             fprintf(stderr, "Write error: %m\n");
-            throw IOException("Write error");
+            fatal("Write error");
         }
 
         len -= res;