tmp file ownership error #140
Description
Not sure if this is an error or unexpected behaviour, but we are deving on a cluster with a shared /tmp folder. Additionally we are using an elixir library called erlexec. As part of the burrito process, running MIX_ENV=dev mix release and then running the burrito wrapped elixir program puts a libc-musl-##.so in /tmp owned by my user. The issue occurs when someone else on the machine wants to run the same burrito application (with a different user account). As the .so is not owned by them this generates a generic access denied error.
As part of the startup check burrito does find the libc
debug: The musl runtime file is already preset. Continuing.
debug: Size of embedded payload is: 13695240
but then runs into a permission error. It wasn't clear to me at first that this was permissions of the so - zig returns a generic
error: AccessDenied
/home/XX/zig-linux-x86_64-0.11.0/lib/std/os.zig:1803:19: 0x1085359 in execveZ (yy)
.ACCES => return error.AccessDenied,
^
/home/XX/zig-linux-x86_64-0.11.0/lib/std/os.zig:1846:57: 0x106c43a in execvpeZ_expandArg0__anon_9360 (xx)
if (mem.indexOfScalar(u8, file_slice, '/') != null) return execveZ(file, child_argv, envp);
^
/home/XX/zig-linux-x86_64-0.11.0/lib/std/process.zig:1153:5: 0x10325a8 in execve (yy)
return os.execvpeZ_expandArg0(.no_expand, argv_buf.ptr[0].?, argv_buf.ptr, envp);
^
/home/XX/yy/deps/burrito/src/erlang_launcher.zig:109:9: 0x1031b66 in launch (yy)
return std.process.execve(allocator, final_args, &erl_env_map);
^
/home/XX/yy/deps/burrito/src/wrapper.zig:145:5: 0x101f08b in main (yy)
try launcher.launch(install_dir, &env_map, &meta, args_trimmed);
(XX = user account, yy the application - also this print out seems to be fixed to the user XX who compiled the code)
but after digging in and running it on different machines / changing ownership of the file in /tmp can make the program run or not.
Its easy enough to work around, but I feel the permissions should be checked - when appropriate -- too?