From 958985df83823d363988c7f1bdc927d057acca31 Mon Sep 17 00:00:00 2001
From: Luke <git@luke.fastmail.us>
Date: Sat, 22 Jul 2023 11:19:16 -0700
Subject: [PATCH] added remote shell detection
---
functions.sh | 7 +++++++
is_remote.sh | 21 +++++++++++++++++++++
2 files changed, 28 insertions(+)
create mode 100644 is_remote.sh
diff --git a/functions.sh b/functions.sh
index 72ce02c..b8714ea 100644
--- a/functions.sh
+++ b/functions.sh
@@ -114,3 +114,10 @@ function rv() {
printf ' RV=%d \e[0m\n' $RV >&2
}
+function hexy() {
+ python3 -c 'import sys
+for v in sys.argv[1:]:
+ print("{:02x}".format(int(v)), end="")
+print("")
+' $*
+}
diff --git a/is_remote.sh b/is_remote.sh
new file mode 100644
index 0000000..5b0b8da
--- /dev/null
+++ b/is_remote.sh
@@ -0,0 +1,21 @@
+# Detect if the current session is running on a remote server by listing parent
+# processes of this shell and checking for things like sshd/tailscaled. Runs
+# first because multiple other things rely on this.
+
+
+function __is_remote() {
+ # names of daemon processes a remote shell might be a child process of
+ remote_daemons=(
+ sshd
+ )
+
+ is_remote=()
+ parent_procs="$(pstree -s $$)"
+ for d in ${remote_daemons[@]}; do
+ if [[ "$parent_procs" =~ "$d" ]]; then
+ return 1
+ fi
+ done
+
+ return 0
+}