fib-example #42

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JakeHillion merged 2 commits from fib-example into main 2022-05-20 19:24:45 +01:00
4 changed files with 56 additions and 13 deletions
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## Running the examples
### examples/fib
The fib example performs fibonacci trivially on a fixed number. It is the most basic example of a process that requires no privilege, excluding `Stdout` to print the result.
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s/Stderr/Stdout/

s/Stderr/Stdout/
To run this example:
cargo build
cargo build --example fib
target/debug/clone-shim -s examples/fib/spec.json target/debug/examples/fib
### examples/basic
The basic example instructs the shim to spawn two processes, each of which writes "hello from main{1,2}!" to stdout.

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fn main() {}
fn main() {
println!("fib(1) = {}", fib(1));
println!("fib(7) = {}", fib(7));
println!("fib(19) = {}", fib(19));
}
fn fib(i: u64) -> u64 {
let mut a = 0;
let mut b = 1;
for _ in 0..i {
(a, b) = (b, a + b);
}
a
}

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examples/fib/spec.json Normal file
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{
"entrypoints": {
"fib": {
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s/main1/fib/

s/main1/fib/
"args": [
"BinaryName"
],
"environment": [
"Stdout",
{
"Filesystem": {
"host_path": "/lib/x86_64-linux-gnu/libgcc_s.so.1",
"environment_path": "/lib/libgcc_s.so.1"
}
},
{
"Filesystem": {
"host_path": "/lib/x86_64-linux-gnu/libc.so.6",
"environment_path": "/lib/libc.so.6"
}
},
{
"Filesystem": {
"host_path": "/lib64/ld-linux-x86-64.so.2",
"environment_path": "/lib64/ld-linux-x86-64.so.2"
}
}
]
}
}
}

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{
"entrypoints": {
"main1": {
"args": [
"BinaryName"
],
"environment": [
"Stdout"
]
}
}
}