Add more paths in getRootPaths for Linux

src/dlangui/core/files.d

@@ -115,6 +115,54 @@ struct RootEntry {
     return path;
 }
 
+version(linux)
+{
+    import core.stdc.stdio : FILE;
+    struct mntent
+    {
+        char *mnt_fsname;   /* Device or server for filesystem.  */
+        char *mnt_dir;      /* Directory mounted on.  */
+        char *mnt_type;     /* Type of filesystem: ufs, nfs, etc.  */
+        char *mnt_opts;     /* Comma-separated options for fs.  */
+        int mnt_freq;       /* Dump frequency (in days).  */
+        int mnt_passno;     /* Pass number for `fsck'.  */
+    };
+    
+    extern(C) @nogc nothrow 
+    {
+        FILE *setmntent(const char *file, const char *mode);
+        mntent *getmntent(FILE *stream);
+        mntent *getmntent_r(FILE * stream, mntent *result, char * buffer, int bufsize);
+        int addmntent(FILE* stream, const mntent *mnt);
+        int endmntent(FILE * stream);
+        char *hasmntopt(const mntent *mnt, const char *opt);
+    }
+    
+    string unescapeLabel(string label)
+    {
+        import std.string : replace;
+        return label.replace("\\x20", " ")
+                    .replace("\\x9", " ") //actually tab
+                    .replace("\\x5c", "\\")
+                    .replace("\\xA", " "); //actually newline
+    }
+    
+    bool isSpecialFileSystem(const(char)[] dir, const(char)[] type)
+    {
+        import std.string : startsWith;
+        if (dir.startsWith("/dev") || dir.startsWith("/proc") || dir.startsWith("/sys") || 
+            dir.startsWith("/var/run") || dir.startsWith("/var/lock"))
+        {
+            return true;
+        }
+        
+        if (type == "tmpfs" || type == "rootfs" || type == "rpc_pipefs") {
+            return true;
+        }
+        return false;
+    }
+}
+
 /// returns array of system root entries
 @property RootEntry[] getRootPaths() {
     RootEntry[] res;
@@ -122,6 +170,53 @@ struct RootEntry {
     version (Posix) {
         res ~= RootEntry(RootEntryType.ROOT, "/", "File System"d);
     }
+    version(linux) {
+        import std.string : fromStringz;
+        import std.format : format;
+        
+        mntent ent;
+        char[1024] buf;
+        FILE* f = setmntent("/etc/mtab", "r");
+        
+        if (f) {
+            scope(exit) endmntent(f);
+            while(getmntent_r(f, &ent, buf.ptr, cast(int)buf.length) !is null) {
+                auto fsName = fromStringz(ent.mnt_fsname);
+                auto mountDir = fromStringz(ent.mnt_dir);
+                auto type = fromStringz(ent.mnt_type);
+                
+                if (mountDir == "/" || //root is already added
+                    isSpecialFileSystem(mountDir, type)) //don't list special file systems
+                {
+                    continue;
+                }
+                
+                string label;
+                enum byLabel = "/dev/disk/by-label";
+                try {
+                    foreach(entry; dirEntries(byLabel, SpanMode.shallow))
+                    {
+                        if (entry.isSymlink) {
+                            auto normalized = buildNormalizedPath(byLabel, entry.readLink);
+                            if (normalized == fsName) {
+                                label = entry.name.baseName.unescapeLabel();
+                            }
+                        }
+                    }
+                } catch(Exception e) {
+                    
+                }
+                
+                if (!label.length) {
+                    label = format("%s volume", type);
+                }
+                
+                auto entryType = (type == "vfat") ? RootEntryType.REMOVABLE : RootEntryType.FIXED; //just a guess
+                res ~= RootEntry(entryType, mountDir.idup, label.toUTF32);
+            }   
+        }
+    }
+    
     version (Windows) {
         import win32.windows;
         uint mask = GetLogicalDrives();