define FFS_BSD macro for known BSD

Author: scivision

include/ffilesystem.h

@@ -22,7 +22,13 @@ typedef unsigned int mode_t;
 #endif
 #endif
 
+#endif // _MSC_VER
+
+#if !defined(__APPLE__) && (defined(BSD) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__))
+#define FFS_BSD 1
 #endif
+
+
 #ifdef __cplusplus
 
 #include <cstdint> // for uintmax_t

src/extra/exepath.cpp

@@ -19,7 +19,7 @@
 #elif defined(__linux__) || defined(__CYGWIN__)
 #include <unistd.h> // for readlink
 #include <sys/types.h> // for ssize_t
-#elif defined(BSD)
+#elif defined(FFS_BSD)
 #include <sys/sysctl.h> // for sysctl
 #include <cstddef> // for size_t
 #endif
@@ -64,7 +64,7 @@ std::string fs_exe_path()
       return path;
     }
   }
-#elif defined(BSD)
+#elif defined(FFS_BSD)
   // https://man.freebsd.org/cgi/man.cgi?sysctl(3)
   auto L = fs_get_max_path();
   std::string path;

src/os.c

@@ -46,8 +46,8 @@ bool fs_is_unix() {
 }
 
 bool fs_is_bsd() {
-#if defined(BSD)
-  return !fs_is_macos();
+#if defined(FFS_BSD)
+  return true;
 #else
   return false;
 #endif

src/partition.cpp

@@ -4,22 +4,23 @@
 #include <iostream>
 #include <system_error>
 
+#include "ffilesystem.h"
+
 #if defined(__linux__) && (__has_include(<linux/magic.h>) || __has_include("linux/magic.h"))
 // GCC < 10 doesn't detect <linux/magic.h>
 // IWYU pragma: no_include <sys/statfs.h>
 #define HAVE_LINUX_MAGIC_H
 #include <sys/vfs.h> // IWYU pragma: keep
 #include <linux/magic.h>
 // https://github.com/torvalds/linux/blob/master/include/uapi/linux/magic.h
-#elif defined(__APPLE__) || defined(BSD)
+#elif defined(__APPLE__) || defined(FFS_BSD)
 #include <sys/param.h>
 #include <sys/mount.h>
 #elif defined(_WIN32) || defined(__CYGWIN__)
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #endif
 
-#include "ffilesystem.h"
 
 
 #ifdef HAVE_LINUX_MAGIC_H
@@ -134,7 +135,7 @@ std::string fs_filesystem_type(std::string_view path)
 # else
   ec = std::make_error_code(std::errc::function_not_supported);
 # endif
-#elif defined(__APPLE__) || defined(BSD)
+#elif defined(__APPLE__) || defined(FFS_BSD)
   struct statfs s;
   const std::string cpath(path);