Check where statfs is defined and the members it defines before using them.

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})

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)
     {