c2nim tool added

lib/impure/osinfo_posix.nim

@@ -0,0 +1,68 @@
+import posix, strutils, os
+
+type
+  Tstatfs {.importc: "struct statfs64", 
+            header: "<sys/statfs.h>", final, pure.} = object
+    f_type: int
+    f_bsize: int
+    f_blocks: int
+    f_bfree: int
+    f_bavail: int
+    f_files: int
+    f_ffree: int
+    f_fsid: int
+    f_namelen: int
+
+proc statfs(path: string, buf: var Tstatfs): int {.
+  importc, header: "<sys/vfs.h>".}
+
+
+proc getSystemVersion*(): string =
+  result = ""
+  
+  var unix_info: TUtsname
+  
+  if uname(unix_info) != 0:
+    os.OSError()
+  
+  if $unix_info.sysname == "Linux":
+    # Linux
+    result.add("Linux ")
+
+    result.add($unix_info.release & " ")
+    result.add($unix_info.machine)
+  elif $unix_info.sysname == "Darwin":
+    # Darwin
+    result.add("Mac OS X ")
+    if "10" in $unix_info.release:
+      result.add("v10.6 Snow Leopard")
+    elif "9" in $unix_info.release:
+      result.add("v10.5 Leopard")
+    elif "8" in $unix_info.release:
+      result.add("v10.4 Tiger")
+    elif "7" in $unix_info.release:
+      result.add("v10.3 Panther")
+    elif "6" in $unix_info.release:
+      result.add("v10.2 Jaguar")
+    elif "1.4" in $unix_info.release:
+      result.add("v10.1 Puma")
+    elif "1.3" in $unix_info.release:
+      result.add("v10.0 Cheetah")
+    elif "0" in $unix_info.release:
+      result.add("Server 1.0 Hera")
+  else:
+    result.add($unix_info.sysname & " " & $unix_info.release)
+    
+    
+when false:
+  var unix_info: TUtsname
+  echo(uname(unix_info))
+  echo(unix_info.sysname)
+  echo("8" in $unix_info.release)
+
+  echo(getSystemVersion())
+
+  var stfs: TStatfs
+  echo(statfs("sysinfo_posix.nim", stfs))
+  echo(stfs.f_files)
+