From 45bb1ae6a507552dc6631d6b37e75cc6f1d73d34 Mon Sep 17 00:00:00 2001
From: Wouter den Breejen <uu@denbreejen.net>
Date: Mon, 23 Jul 2007 14:38:23 +0000
Subject: [PATCH] Added ext3cow lib

---
 src/libext3cow/Makefile.am     | 13 +++++
 src/libext3cow/epoch2date.c    | 24 +++++++++
 src/libext3cow/ext3cow_tools.h | 10 ++++
 src/libext3cow/snapshot.cc     | 94 ++++++++++++++++++++++++++++++++++
 src/libext3cow/snapshot.hh     | 11 ++++
 src/libext3cow/tt.c            | 46 +++++++++++++++++
 6 files changed, 198 insertions(+)
 create mode 100644 src/libext3cow/Makefile.am
 create mode 100644 src/libext3cow/epoch2date.c
 create mode 100644 src/libext3cow/ext3cow_tools.h
 create mode 100644 src/libext3cow/snapshot.cc
 create mode 100644 src/libext3cow/snapshot.hh
 create mode 100644 src/libext3cow/tt.c

diff --git a/src/libext3cow/Makefile.am b/src/libext3cow/Makefile.am
new file mode 100644
index 000000000..bb9dc579a
--- /dev/null
+++ b/src/libext3cow/Makefile.am
@@ -0,0 +1,13 @@
+pkglib_LTLIBRARIES = libext3cow.la
+
+libext3cow_la_SOURCES = epoch2date.c snapshot.cc tt.c ext3cow_tools.h
+
+pkginclude_HEADERS = snapshot.hh
+
+#TODO linux kernel header
+
+libext3cow_la_LIBADD = ../boost/format/libformat.la 
+
+AM_CXXFLAGS = -Wall \
+ -I$(srcdir)/.. ${aterm_include}
+
diff --git a/src/libext3cow/epoch2date.c b/src/libext3cow/epoch2date.c
new file mode 100644
index 000000000..7e834473e
--- /dev/null
+++ b/src/libext3cow/epoch2date.c
@@ -0,0 +1,24 @@
+
+/* epoch2date.c - an ext3cow tool for turning epoch numbers into dates.
+ * Copyright (C) 2003-2007 Zachary N. J. Peterson
+ */
+
+
+#include "ext3cow_tools.h"
+
+int main(int argc, char** argv){
+
+  time_t time;
+
+  if(argc < 2){
+    fprintf(stderr, "usage: %s seconds\n", argv[0]);
+    exit(1);
+  }
+
+  time = atoi(argv[1]);
+
+  printf("%s", ctime(&time));
+
+  return 0;
+
+}
diff --git a/src/libext3cow/ext3cow_tools.h b/src/libext3cow/ext3cow_tools.h
new file mode 100644
index 000000000..8feade595
--- /dev/null
+++ b/src/libext3cow/ext3cow_tools.h
@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <time.h>
+#include <sys/time.h>
+#include </nix/store/8nirllv1w6qv6c5srjgah2m82bfi1d6k-linux-2.6.21.5/lib/modules/2.6.21.5-default/build/include/linux/ext3cow_fs.h>
diff --git a/src/libext3cow/snapshot.cc b/src/libext3cow/snapshot.cc
new file mode 100644
index 000000000..992f3ec84
--- /dev/null
+++ b/src/libext3cow/snapshot.cc
@@ -0,0 +1,94 @@
+
+/* snapshot.c - an ext3cow tool for taking file system snapshots
+ * Copyright (C) 2003-2007 Zachary N. J. Peterson
+ */
+
+
+#include "ext3cow_tools.h"
+#include "snapshot.hh"
+
+//using namespace nix;
+
+namespace nix {
+
+/*
+void snapshot_usage(void){
+  
+  fprintf(stderr, "usage: snapshot <mountpoint>\n");
+
+}
+
+
+int snapshot_main(int argc, char** argv){
+
+  int fd;
+  int ret;
+  unsigned int epoch = 0;
+  char path[256] = ".\0";
+  
+  if(argc > 1)
+    strcpy(path, argv[1]);
+
+  printf("Snapshot on %s: ", path);
+
+  fd = open(path, O_RDONLY);
+  
+  // test for ext3cow fs type
+
+  if(fd < 0){
+    printf("failed.\n");
+    perror(argv[0]);
+    exit(1);
+  }
+
+  epoch = (int)ioctl(fd, EXT3COW_IOC_TAKESNAPSHOT, &epoch);
+  if((int)epoch < 0){
+    printf("failed.\n");
+    perror(argv[0]);
+    exit(1);
+  }
+
+  printf("%u\n", (unsigned int)epoch);
+
+
+  return 0;
+
+}
+*/
+
+//End original function
+unsigned int take_snapshot(const char* dir) //const string & file_or_dir)
+{
+  //const char* dir = "test";
+
+  int fd;
+  int ret;
+  unsigned int epoch = 0;
+  
+  //char path[256] = ".\0";
+  //TODO 256 length check ???
+  //strcpy(path, dir);
+
+  fd = open(dir, O_RDONLY);
+  
+  /* test for ext3cow fs type */
+
+  if(fd < 0){
+    printf("failed.\n");
+    perror(dir);
+    exit(1);
+  }
+
+  epoch = (int)ioctl(fd, EXT3COW_IOC_TAKESNAPSHOT, &epoch);
+  if((int)epoch < 0){
+    printf("failed.\n");
+    perror(dir);
+    exit(1);
+  }
+  
+  printf("%u\n", (unsigned int)epoch);
+
+  return epoch;
+}
+
+}
\ No newline at end of file
diff --git a/src/libext3cow/snapshot.hh b/src/libext3cow/snapshot.hh
new file mode 100644
index 000000000..299a32bf0
--- /dev/null
+++ b/src/libext3cow/snapshot.hh
@@ -0,0 +1,11 @@
+#ifndef SNAPSHOT_H_
+#define SNAPSHOT_H_
+
+namespace nix {
+
+//unsigned int take_snapshot(const string & file_or_dir);
+unsigned int take_snapshot(const char* dir);
+
+}
+
+#endif /*SNAPSHOT_H_*/
diff --git a/src/libext3cow/tt.c b/src/libext3cow/tt.c
new file mode 100644
index 000000000..0114232e1
--- /dev/null
+++ b/src/libext3cow/tt.c
@@ -0,0 +1,46 @@
+
+/* tt.c - an ext3cow tool for retreiving the current file system epoch
+ * Copyright (C) 2003-2007 Zachary N. J. Peterson
+ */
+
+#include "ext3cow_tools.h"
+
+void tt_usage(void){
+  
+  fprintf(stderr, "usage: tt <mountpoint>\n");
+
+}
+
+int tt_main(int argc, char** argv){
+
+  int fd;
+  int ret;
+  unsigned int epoch = 0;
+  char path[255] = ".\0";
+  
+  if(argc > 1)
+    strcpy(path, argv[1]);
+
+
+  fd = open(path, O_RDONLY);
+  
+  /* test for ext3cow fs type */
+
+  if(fd < 0){
+    fprintf(stderr, "Couldn't open %s\n", path);
+    exit(1);
+  }
+
+
+  ret = ioctl(fd, EXT3COW_IOC_GETEPOCH, &epoch);
+  if(ret < 0){
+    printf("tt on %s failed.\n", path);
+    perror(argv[0]);
+    exit(1);
+  }
+  printf("Epoch: %d\n", ret);
+  close(fd);
+  
+  return 0;
+
+}