Bash script not capturing subprocess output correctly when using pipe
I'm trying to debug I'm refactoring my project and I'm working on a personal project and After trying multiple solutions online, I still can't figure this out..... I'm working on a project and hit a roadblock. I'm working on a Bash script intended to process log files, and I'm running into an scenario where the output of a subprocess isn't being captured as expected when using a pipe. My script looks like this: ```bash #!/bin/bash log_file="/var/log/myapp.log" # Attempt to grep and count occurrences of 'behavior' error_count=$(grep 'behavior' "$log_file" | wc -l) echo "Number of behavior entries: $error_count" ``` When I run it, the output is always 0, even when I know there are 'behavior' entries in the log file. I confirmed that the log file exists and contains the expected text. To troubleshoot, I tried running the `grep` command directly in the terminal: ```bash grep 'behavior' /var/log/myapp.log ``` This correctly returns the lines containing 'behavior', so I know the log file is being read correctly. I also checked that my script has execution permissions and is being executed in the right environment. Additionally, I tried running it without the pipe: ```bash error_count=$(grep 'behavior' "$log_file") ``` to see if that yields any output, but this also results in an unexpected behavior where the variable captures the full lines instead of just the count. Is there something I'm missing with how pipes work in Bash? Any insights would be greatly appreciated! For context: I'm using Bash on macOS. I'm working on a service that needs to handle this. This is part of a larger service I'm building. Thanks in advance! I'm working on a microservice that needs to handle this. Any help would be greatly appreciated! For reference, this is a production REST API. What would be the recommended way to handle this? Has anyone else encountered this? This is part of a larger service I'm building. What are your experiences with this?