From 395d43dc05bd8767423e7edca052f160207e3b81 Mon Sep 17 00:00:00 2001
From: Konstantin Pereiaslov <perk11@perk11.info>
Date: Fri, 5 Jan 2024 02:23:45 -0600
Subject: [PATCH] Check if PID is running before starting to monitor

---
 main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/main.c b/main.c
index a327e6a..17e969a 100644
--- a/main.c
+++ b/main.c
@@ -178,6 +178,10 @@ int main(int argc, char *argv[]) {
         pid = run_shell_command(shell_command_to_run);
     } else {
         pid = external_pid;
+        if (kill(pid, 0) == -1) {
+            fprintf_error("PID %d is not running\n", pid);
+            exit(1);
+        }
     }
     free(shell_command_to_run);
     struct timespec time_when_command_started;