filesys: write support for host directory mounts

copperline.example.toml

@@ -244,18 +244,22 @@ video = "PAL"
 
 
 # Host directories mounted directly as AmigaDOS volumes (HOSTFS0:,
-# HOSTFS1:, ...), served live with no disk image in between. Read-only for
-# now: write operations fail with "disk is write-protected". Up to 16
-# mounts. volume defaults to the directory name. bootpri (-128..127,
-# default -128 = never boot) enters the boot-device vote: hard-disk boot
-# partitions typically sit at 0 and DF0: at 5.
+# HOSTFS1:, ...), served live with no disk image in between: the guest reads
+# and writes the host's files directly, and changes land in the directory as
+# you would expect. Up to 16 mounts. volume defaults to the directory name.
+# bootpri (-128..127, default -128 = never boot) enters the boot-device vote:
+# hard-disk boot partitions typically sit at 0 and DF0: at 5. readonly exports
+# the directory write-protected: the guest sees a read-only disk and every
+# write fails, which is worth setting on anything you would rather the Amiga
+# could not damage.
 # [[filesys]]
 # path = "/data/amiga/Workbench"
 # volume = "Workbench"
 # bootpri = 6
 #
 # [[filesys]]
 # path = "/data/amiga/downloads"
+# readonly = true
 
 
 # Presentation options. overscan: "tv" (default; mask deep horizontal

src/amigaos/dos.rs

@@ -48,12 +48,20 @@ pub const ACTION_EXAMINE_FH: i32 = 1034; // ExamineFH()
 pub const DOSTRUE: u32 = 0xFFFF_FFFF;
 pub const DOSFALSE: u32 = 0;
 pub const ERROR_OBJECT_IN_USE: u32 = 202;
+pub const ERROR_OBJECT_EXISTS: u32 = 203;
+pub const ERROR_DIRECTORY_NOT_FOUND: u32 = 204;
 pub const ERROR_OBJECT_NOT_FOUND: u32 = 205;
+pub const ERROR_INVALID_COMPONENT_NAME: u32 = 206;
 pub const ERROR_ACTION_NOT_KNOWN: u32 = 209;
 pub const ERROR_INVALID_LOCK: u32 = 211;
 pub const ERROR_OBJECT_WRONG_TYPE: u32 = 212;
 pub const ERROR_DISK_WRITE_PROTECTED: u32 = 214;
+pub const ERROR_RENAME_ACROSS_DEVICES: u32 = 215;
+pub const ERROR_DIRECTORY_NOT_EMPTY: u32 = 216;
 pub const ERROR_SEEK_ERROR: u32 = 219;
+pub const ERROR_DISK_FULL: u32 = 221;
+pub const ERROR_DELETE_PROTECTED: u32 = 222;
+pub const ERROR_WRITE_PROTECTED: u32 = 223;
 pub const ERROR_NO_MORE_ENTRIES: u32 = 232;
 /// ACTION_SEEK Arg3 modes (dos/dos.h OFFSET_*).
 pub const OFFSET_BEGINNING: i32 = -1;

src/config.rs

@@ -1343,6 +1343,10 @@ pub(crate) struct RawFilesysMount {
     /// volume but never offers it as a boot candidate.
     #[serde(skip_serializing_if = "Option::is_none")]
     pub(crate) bootpri: Option<i8>,
+    /// Export the directory write-protected: the guest sees the volume as a
+    /// read-only disk and every write fails. Defaults to false.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub(crate) readonly: Option<bool>,
 }
 
 /// `[input]` host-input preferences. Currently just the initial joystick input
@@ -2155,6 +2159,7 @@ impl TryFrom<RawConfig> for Config {
                             .unwrap_or_else(|| "HostFS".into())
                     }),
                     boot_pri: m.bootpri.unwrap_or(-128),
+                    readonly: m.readonly.unwrap_or(false),
                 })
                 .collect(),
             chipset,
@@ -2940,6 +2945,7 @@ mod tests {
                 path: std::path::PathBuf::from("."),
                 volume: volume.to_string(),
                 boot_pri: -128,
+                readonly: false,
             }],
             ..Config::default()
         };