initial commit

Author: toshke

.gitignore

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+sh

Makefile

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+build:
+	go build sh.go

README.md

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+## Go bash wrapper
+
+- Forwards CLI arguments to `/bin/bash`
+- Fails if there is `GO_SH_WRAPPER` variable defined as recursion
+  control variable
+
+## But, why?
+
+Amazon ssm-agent by default runs with 'sh' command and such does
+not load full bash shell, and does not process user home-directory
+startup files like `~/.bashrc`
+
+Replace standard `/bin/sh` with `sh` file produce by running `make build`
+
+[Relevant discussion](https://github.com/aws/amazon-ssm-agent/pull/171)

sh.go

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+package main
+
+import (
+  "log"
+  "os"
+  "os/exec"
+)
+
+func main() {
+  _, set := os.LookupEnv("GO_SH_WRAPPER")
+  if set {
+    os.Exit(0)
+  }
+  env := append(os.Environ(),"GO_SH_WRAPPER=1")
+  args := os.Args[1:]
+  cmd := exec.Command("/bin/bash", args...)
+  cmd.Env = env
+  cmd.Stderr = os.Stderr
+  cmd.Stdin = os.Stdin
+  cmd.Stdout = os.Stdout
+  if err := cmd.Run(); err != nil {
+    log.Fatal(err)
+  }
+}