Simple bash command

Author: geofft

Cargo.toml

@@ -3,3 +3,8 @@
 name = "bashplugin"
 version = "0.0.1"
 authors = ["Geoffrey Thomas <[email protected]>"]
+
+[lib]
+
+name = "bashplugin"
+crate-type = ["dylib"]

README.md

@@ -0,0 +1,9 @@
+This is an example bash loadable command written in Rust.
+
+Usage:
+```
+geofft@cactuar:~/src/scratch/bashplugin$ cargo build
+geofft@cactuar:~/src/scratch/bashplugin$ enable -f target/libbashplugin-*.so lulz
+geofft@cactuar:~/src/scratch/bashplugin$ lulz
+lulz
+```

src/bash.rs

@@ -0,0 +1,39 @@
+extern crate libc;
+
+// command.h
+
+#[repr(C)]
+pub struct word_desc {
+    word: *mut libc::c_char,
+    flags: libc::c_int,
+}
+
+pub struct word_list {
+    next: *mut word_list,
+    word: *mut word_desc,
+}
+
+// general.h
+
+type sh_builtin_func_t = extern fn (*mut word_list) -> libc::c_int;
+
+// builtins.h
+
+pub const BUILTIN_ENABLED: libc::c_int = 0x01;
+pub const BUILTIN_DELETED: libc::c_int = 0x02;
+pub const STATIC_BUILTIN: libc::c_int = 0x04;
+pub const SPECIAL_BUILTIN: libc::c_int = 0x08;
+pub const ASSIGNMENT_BUILTIN: libc::c_int = 0x10;
+pub const POSIX_BUILTIN: libc::c_int = 0x20;
+
+#[repr(C)]
+pub struct builtin {
+    pub name: *const libc::c_char,
+    pub function: sh_builtin_func_t,
+    pub flags: libc::c_int,
+    pub long_doc: *const *const libc::c_char,
+    pub short_doc: *const libc::c_char,
+    pub handle: *const libc::c_char,
+}
+
+

src/lib.rs

@@ -1,3 +1,19 @@
-#[test]
-fn it_works() {
+extern crate libc;
+mod bash;
+
+extern fn builtin_lulz(args: *mut bash::word_list) -> libc::c_int {
+    println!("lulz");
+    0
 }
+
+static NAME: [i8; 5] = ['l' as i8, 'u' as i8, 'l' as i8, 'z' as i8, 0 as i8];
+
+#[no_mangle]
+pub static mut lulz_struct: bash::builtin = bash::builtin {
+    name: &NAME as *const i8,
+    function: builtin_lulz,
+    flags: bash::BUILTIN_ENABLED,
+    long_doc: 0 as *const *const i8,
+    short_doc: &NAME as *const i8,
+    handle: 0 as *const i8,
+};