ksud: add cmd for add-try-umount (5ec1cff#16)

int main(int argc, char *argv[]) {
	if (argc != 4) {
		printf("Usage: %s <option> <option> <string>\n", argv[0]);
		return 1;
	}

	unsigned long option = strtoul(argv[1], NULL, 0);
	unsigned long arg2 = strtoul(argv[2], NULL, 0);
	const char *arg3 = argv[3];
	unsigned long arg4 = 0;
	unsigned long arg5 = 0;

	printf("SYS_prctl(%lu, %lu, %p, %p, %p)\n", option, arg2, &arg3, &arg4, &arg5);
	syscall(SYS_prctl, option, arg2, arg3, &arg4, &arg5);

	printf("arg3: %lu\n", (unsigned long)arg3);
	printf("arg4: %lu\n", arg4);
	printf("arg5: 0x%lx\n", arg5);
	return 0;

}

Author: backslashxx

userspace/ksud/src/cli.rs

@@ -10,6 +10,8 @@ use log::LevelFilter;
 use crate::defs::KSUD_VERBOSE_LOG_FILE;
 use crate::{apk_sign, assets, debug, defs, init_event, ksucalls, module, utils};
 
+use std::ffi::CString;
+
 /// KernelSU userspace cli
 #[derive(Parser, Debug)]
 #[command(author, version = defs::VERSION_NAME, about, long_about = None)]
@@ -29,6 +31,11 @@ enum Commands {
         command: Module,
     },
 
+    /// Add custom try umount path
+    AddTryUmount {  
+        path: PathBuf,  
+    },
+
     /// Trigger `post-fs-data` event
     PostFsData,
 
@@ -309,6 +316,22 @@ pub fn run() -> Result<()> {
                 Module::List => module::list_modules(),
             }
         }
+	Commands::AddTryUmount { path } => {  
+	    match CString::new(path.to_string_lossy().as_ref()) {  
+		std::result::Result::Ok(c_path) => {  
+		    let mut dummy: u32 = 0;  
+		    unsafe {  
+		        libc::prctl(0xDEADBEEFu32 as i32, 10001, c_path.as_ptr() as libc::c_ulong,   
+		                   &mut dummy as *mut u32 as libc::c_ulong,   
+		                   &mut dummy as *mut u32 as libc::c_ulong);  
+		    }  
+		}  
+		std::result::Result::Err(e) => {  
+		    eprintln!("Failed to create CString: {}", e);  
+		}  
+	    }  
+	    Ok(())  
+	}
         Commands::Install { magiskboot } => utils::install(magiskboot),
         Commands::Uninstall { magiskboot } => utils::uninstall(magiskboot),
         Commands::Sepolicy { command } => match command {