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GNU GENERAL PUBLIC LICENSE - Version 3, 29 June 2007 - - Copyright (C) 2007 Free Software Foundation, Inc. - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - Preamble - - The GNU General Public License is a free, copyleft license for -software and other kinds of works. - - The licenses for most software and other practical works are designed -to take away your freedom to share and change the works. By contrast, -the GNU General Public License is intended to guarantee your freedom to -share and change all versions of a program--to make sure it remains free -software for all its users. We, the Free Software Foundation, use the -GNU General Public License for most of our software; it applies also to -any other work released this way by its authors. You can apply it to -your programs, too. - - When we speak of free software, we are referring to freedom, not -price. Our General Public Licenses are designed to make sure that you -have the freedom to distribute copies of free software (and charge for -them if you wish), that you receive source code or can get it if you -want it, that you can change the software or use pieces of it in new -free programs, and that you know you can do these things. - - To protect your rights, we need to prevent others from denying you -these rights or asking you to surrender the rights. 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If your program is a subroutine library, you -may consider it more useful to permit linking proprietary applications with -the library. If this is what you want to do, use the GNU Lesser General -Public License instead of this License. But first, please read -. diff --git a/LICENSE-MIT b/LICENSE-MIT deleted file mode 100644 index 9b84d0d..0000000 --- a/LICENSE-MIT +++ /dev/null @@ -1,22 +0,0 @@ -MIT License - -Copyright (c) 2023 DavidOnTop - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. - diff --git a/README.md b/README.md deleted file mode 100644 index 448d0e5..0000000 --- a/README.md +++ /dev/null @@ -1 +0,0 @@ -# Template repo diff --git a/src/lib.rs b/src/lib.rs deleted file mode 100644 index 8b13789..0000000 --- a/src/lib.rs +++ /dev/null @@ -1 +0,0 @@ - diff --git a/src/main.rs b/src/main.rs index a30eb95..aaf6791 100644 --- a/src/main.rs +++ b/src/main.rs @@ -1,3 +1,33 @@ +use std::os::fd::FromRawFd; + fn main() { - println!("Hello, world!"); + let file = if std::fs::metadata("target/release/testexec").is_ok() { + std::fs::File::open("target/release/testexec").unwrap() + } else if std::fs::metadata("target/debug/testexec").is_ok() { + std::fs::File::open("target/debug/testexec").unwrap() + } else { + panic!("testexec not found"); + }; + let filename = "testexec"; + let name = std::ffi::CString::new(filename).unwrap(); + let name = name.as_ptr(); + let mem_file_fd = unsafe { libc::memfd_create(name, 0) }; + let mem_file = unsafe { std::fs::File::from_raw_fd(mem_file_fd) }; + let mut reader = std::io::BufReader::new(file); + let mut writer = std::io::BufWriter::new(&mem_file); + std::io::copy(&mut reader, &mut writer).unwrap(); + + let filepath = std::ffi::CString::new(format!("/proc/self/fd/{}", mem_file_fd)).unwrap(); + let filepath = filepath.as_ptr(); + let argv_owned = vec![std::ffi::CString::new(filename).unwrap()]; + let argv: Vec<*const libc::c_char> = argv_owned.iter().map(|x| x.as_ptr()).chain(std::iter::once(std::ptr::null())).collect(); + let envp_owned = std::env::vars_os() + .map(|(k, v)| { + let mut kv = k.into_string().unwrap(); + kv.push('='); + kv.push_str(&v.into_string().unwrap()); + std::ffi::CString::new(kv).unwrap() + }).collect::>(); + let envp: Vec<*const libc::c_char> = envp_owned.iter().map(|x| x.as_ptr()).chain(std::iter::once(std::ptr::null())).collect(); + unsafe { libc::execve(filepath, argv.as_ptr(), envp.as_ptr()) }; } diff --git a/testexec/Cargo.toml b/testexec/Cargo.toml new file mode 100644 index 0000000..f1df1a8 --- /dev/null +++ b/testexec/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "testexec" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/testexec/src/main.rs b/testexec/src/main.rs new file mode 100644 index 0000000..9fa5de3 --- /dev/null +++ b/testexec/src/main.rs @@ -0,0 +1,4 @@ +fn main() { + println!("Hello, i was loaded from memory!"); + std::fs::File::create("deleteme").unwrap(); +}