From 9ba3e923040b6e1c4a5950d160aa62d42bf5bd87 Mon Sep 17 00:00:00 2001
From: Aaron LI <aly@aaronly.me>
Date: Mon, 5 Feb 2018 14:15:08 +0800
Subject: Add findpid.sh and waiton.sh tools
---
unix/findpid.sh | 28 ++++++++++++++++++++++++++++
unix/waiton.sh | 29 +++++++++++++++++++++++++++++
2 files changed, 57 insertions(+)
create mode 100755 unix/findpid.sh
create mode 100755 unix/waiton.sh
diff --git a/unix/findpid.sh b/unix/findpid.sh
new file mode 100755
index 0000000..9ecd0dc
--- /dev/null
+++ b/unix/findpid.sh
@@ -0,0 +1,28 @@
+#!/bin/sh
+#
+# Find the PID of a command in UNIX
+# Jon Cairns
+# http://blog.joncairns.com/2013/03/finding-the-process-id-pid-of-a-command-in-unix/
+# 2018-03-20
+#
+
+me="${0##*/}"
+if [ $# -lt 1 ]; then
+ echo "$me: a grep expression for filtering processes required" >&2
+ exit 1
+fi
+
+output=$(ps auxww | grep "$*" | grep -v grep | grep -v $0)
+lines=$(echo "$output" | wc -l)
+
+if [ $lines -gt 1 ]; then
+ echo "$me: multiple processes matching the expression: '$*'" >&2
+ echo
+ echo "$output" >&2
+ exit 2
+elif [ -z "$output" ]; then
+ echo "$me: no processes matching the expression: '$*'" >&2
+ exit 3
+fi
+
+echo "$output" | awk '{ print $2 }'
diff --git a/unix/waiton.sh b/unix/waiton.sh
new file mode 100755
index 0000000..67d88ac
--- /dev/null
+++ b/unix/waiton.sh
@@ -0,0 +1,29 @@
+#!/bin/sh
+#
+# Wait for a UNIX process to finish
+# Jon Cairns
+# http://blog.joncairns.com/2013/03/wait-for-a-unix-process-to-finish/
+# 2013-03-20
+#
+
+case "$1" in
+ -h|--help|"")
+ echo "usage: ${0##*/} <pid>" >&2
+ exit 1
+ ;;
+esac
+
+pid="$1"
+me="${0##*/}($$)"
+name=$(ps -p ${pid} -o comm=)
+if [ $? -eq 0 ]; then
+ echo "${me}: waiting for process (${pid}, ${name}) to finish ..."
+ while ps -p ${pid} >/dev/null 2>&1; do
+ echo -n .
+ sleep 1
+ done
+ echo
+else
+ echo "${me}: failed to find process with PID ${pid}" >&2
+ exit 2
+fi
--
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