Add the GetPlatformInfo action

Cargo.toml

@@ -45,13 +45,21 @@ proc-mounts = { version = "0.2.4", optional = true }
 # [1]: https://github.com/rust-lang/cargo/issues/1596
 fuse = { version = "0.3.1", optional = true }
 
+[target.'cfg(target_os = "macos")'.dependencies]
+cocoa = { git = "https://github.com/servo/core-foundation-rs.git", rev = "786895643140fa0ee4f913d7b4aeb0c4626b2085", optional = true }
+objc = { version = "0.2", optional = true }
+
 [target.'cfg(target_os = "windows")'.dependencies]
+windows = { version = "0.43.0", features = ["Win32_Foundation", "Win32_System_Diagnostics_Debug", "Win32_Storage_FileSystem", "Win32_System_LibraryLoader", "Win32_System_SystemInformation"], optional = true }
 winreg = { version = "0.7.0", optional = true }
 
 [dev-dependencies]
 rand = { version = "0.8.5" }
 tempfile = { version = "3.3.0" }
 
+[target.'cfg(target_os = "linux")'.build-dependencies]
+cc = { version = "1.0", optional = true }
+
 [features]
 default = [
     "action-insttime",
@@ -62,6 +70,7 @@ default = [
     "action-memsize",
     "action-metadata",
     "action-network",
+    "action-platform-info",
     "action-stat",
     "action-timeline",
 ]
@@ -74,6 +83,7 @@ action-listdir = []
 action-memsize = ["dep:sysinfo"]
 action-metadata = []
 action-network = ["dep:netstat2", "dep:sysinfo"]
+action-platform-info = ["dep:cc", "dep:cocoa", "dep:objc", "dep:windows"]
 action-stat = []
 action-timeline = ["dep:flate2", "dep:sha2"]
 

build.rs

@@ -0,0 +1,10 @@
+fn main() {
+    #[cfg(all(target_os = "linux", feature = "action-platform-info"))]
+    {
+        println!("cargo:rerun-if-changed=src/action/libc_version.c");
+
+        cc::Build::new()
+            .file("src/action/libc_version.c")
+            .compile("liblibc_version.a");
+    }
+}

src/action.rs

@@ -49,6 +49,9 @@ pub mod memsize;
 #[cfg(feature = "action-finder")]
 pub mod finder;
 
+#[cfg(feature = "action-platform-info")]
+pub mod platform_info;
+
 pub use error::{ParseArgsError, ParseArgsErrorKind, DispatchError};
 
 /// Dispatches the given `request` to an appropriate action handler.
@@ -73,6 +76,11 @@ where
             handle(session, request, self::metadata::handle)
         }
 
+        #[cfg(feature = "action-platform-info")]
+        "GetPlatformInfo" => {
+            handle(session, request, self::platform_info::handle)
+        }
+
         #[cfg(feature = "action-listdir")]
         "ListDirectory" => {
             handle(session, request, self::listdir::handle)

src/action/insttime.rs

@@ -172,7 +172,7 @@ mod e2fs_utils {
 ///
 /// This function returns `None` in case of errors.
 #[cfg(target_os = "linux")]
-fn get_install_time() -> Option<SystemTime> {
+pub fn get_install_time() -> Option<SystemTime> {
     // First, check the creation time of the root. Rust implementation of
     // `Metadata::created()` on Linux utilizes `statx` syscall, so this
     // method will work only on kernels >= 4.11.
@@ -221,7 +221,7 @@ fn get_install_time() -> Option<SystemTime> {
 ///
 /// This function returns `None` in case of errors.
 #[cfg(target_os = "macos")]
-fn get_install_time() -> Option<SystemTime> {
+pub fn get_install_time() -> Option<SystemTime> {
     // Here, we use the same way as Python version of GRR client does. We just
     // check the modification time for some of the paths.
     const CANDIDATES: [&str; 3] = [
@@ -239,7 +239,7 @@ fn get_install_time() -> Option<SystemTime> {
 ///
 /// This function returns `None` in case of errors.
 #[cfg(target_os = "windows")]
-fn get_install_time() -> Option<SystemTime> {
+pub fn get_install_time() -> Option<SystemTime> {
     use winreg::RegKey;
 
     // Don't use winreg::enums::KEY_WOW64_64KEY since it breaks on Windows 2000.

src/action/libc_version.c

@@ -0,0 +1,14 @@
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+#include <gnu/libc-version.h>
+#else
+#include <stddef.h>
+#endif
+
+const char *libc_version(void) {
+#ifdef __GNU_LIBRARY__
+  return gnu_get_libc_version();
+#else
+  return NULL;
+#endif
+}