From e27119ba171a083ed0b41d4b499212106e8c6819 Mon Sep 17 00:00:00 2001
From: Renge <renge@renge.io>
Date: Fri, 15 Apr 2022 21:13:14 -0400
Subject: [PATCH] fix: bug in io_handler

---
 hw4/src/jobs.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/hw4/src/jobs.c b/hw4/src/jobs.c
index 25be457..58baf9b 100644
--- a/hw4/src/jobs.c
+++ b/hw4/src/jobs.c
@@ -92,9 +92,12 @@ void io_handler(int sig) {
             if (job_data_array[i]->pipeline->capture_output)
             {
                 char c;
-                while (read(job_data_array[i]->pipe[0], &c, sizeof(char)) &&
-                        read(job_data_array[i]->pipe[0], &c, sizeof(char)) != -1)
+                while (1)
                 {
+                    int num = read(job_data_array[i]->pipe[0], &c, sizeof(char));
+                    if (num == 0 || num == -1) {
+                        break;
+                    }
                     job_data_array[i]->output_length ++;
                     job_data_array[i]->output = realloc(job_data_array[i]->output, (job_data_array[i]->output_length + 1) * sizeof(char));
                     job_data_array[i]->output[job_data_array[i]->output_length - 1] = c;