From b74a939dbb6afb15af15f474d30ddd2580071a5f Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Mon, 15 Mar 2021 01:09:21 +0000
Subject: [PATCH] Check where statfs is defined and the members it defines
 before using them.

---
 setter/src/unix/CMakeLists.txt | 28 +++++++++++++++++++++++++++-
 setter/src/unix/volume.c       | 14 +++++++++++++-
 2 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/setter/src/unix/CMakeLists.txt b/setter/src/unix/CMakeLists.txt
index 1655e88..8b137cc 100644
--- a/setter/src/unix/CMakeLists.txt
+++ b/setter/src/unix/CMakeLists.txt
@@ -26,6 +26,32 @@ if(NOT ${CMAKE_SYSTEM_NAME} MATCHES "Linux" AND NOT ${CMAKE_SYSTEM_NAME} MATCHES
     return()
 endif()
 
+include(CheckSymbolExists)
+include(CheckStructHasMember)
+
+CHECK_SYMBOL_EXISTS(statfs "sys/statfs.h" HAVE_SYS_STATFS)
+CHECK_SYMBOL_EXISTS(statfs "sys/mount.h" HAVE_SYS_MOUNT)
+
+# Linux and FreeBSD
+if(HAVE_SYS_STATFS)
+    message("-- Found statfs in sys/statfs.h")
+    add_definitions(-DHAVE_SYS_STATFS_H)
+    CHECK_STRUCT_HAS_MEMBER(statfs "f_namelen" "sys/statfs.h" HAVE_STATFS_FNAMELEN)
+endif()
+
+# Darwin and most other BSDs
+if(HAVE_SYS_MOUNT)
+    message("-- Found statfs in sys/mount.h")
+    add_definitions(-DHAVE_SYS_MOUNT_H)
+    CHECK_STRUCT_HAS_MEMBER(statfs "f_namelen" "sys/statfs.h" HAVE_STATFS_FNAMELEN)
+endif()
+
+if(HAVE_STATFS_FNAMELEN)
+    message("-- statfs has f_namelen member")
+    add_definitions(-DUSE_STATFS_FNAMELEN)
+    CHECK_STRUCT_HAS_MEMBER(statfs "f_namelen" "sys/statfs.h" HAVE_STATFS_FNAMELEN)
+endif()
+
 set(UNIX_SOURCES attr.c deleted.c dirdepth.c filename.c files.c frag.c links.c os.c perms.c rsrcfork.c sparse.c time.c volume.c xattr.c)
 
-add_library(unix ${UNIX_SOURCES})
+add_library(unix ${UNIX_SOURCES})
\ No newline at end of file
diff --git a/setter/src/unix/volume.c b/setter/src/unix/volume.c
index 22239f4..0b4cb65 100644
--- a/setter/src/unix/volume.c
+++ b/setter/src/unix/volume.c
@@ -22,10 +22,19 @@ Aaru Data Preservation Suite
 Copyright (C) 2011-2021 Natalia Portillo
 *****************************************************************************/
 
-#include <errno.h>
 #include <stddef.h>
+
+#include <errno.h>
 #include <stdio.h>
+
+#ifdef HAVE_SYS_STAT_H
 #include <sys/statfs.h>
+#endif
+
+#if defined(HAVE_SYS_MOUNT_H)
+#include <sys/param.h>
+#include <sys/mount.h>
+#endif
 
 #include "../include/defs.h"
 #include "../log.h"
@@ -138,7 +147,10 @@ void GetVolumeInfo(const char* path, size_t* clusterSize)
     log_write("\tBytes per block: %ld\n", buf.f_bsize);
     log_write("\tVolume size: %llu bytes\n", ((unsigned long long)buf.f_blocks) * buf.f_bsize);
     log_write("\tVolume free: %llu bytes\n", ((unsigned long long)buf.f_bfree) * buf.f_bsize);
+
+#if defined(USE_STATFS_FNAMELEN)
     log_write("\tMaximum component length: %ld\n", buf.f_namelen);
+#endif
 
     if(buf.f_flags)
     {