Use common library header file for zombie killing method.

Author: optiklab

multithreading/01 - Signals_SIGCHLD.c

@@ -2,44 +2,15 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <sys/wait.h>
 
-#define EXIT_FAILURE 1
+#include "Common.h"
 
 // To compile:
 // gcc -std=gnu99 "01 - Signals_SIGCHLD.c" -o signals_sigchld
 
 // Task:
 // Create a program which creates a child process and handles SIGCHLD signal from its childs.
 
-void kill_child_handler(int sig)
-{
-    int status;
-    pid_t done = waitpid(
-        -1, // Any child
-        &status,
-        0); // Blocked mode.
-    if (done == -1)
-    {
-        printf("No more child processes.\n");
-    }
-    else
-    {
-        short isNormalTermination = WIFEXITED(status);
-        if (!isNormalTermination ||
-            // WEXITSTATUS should be used only if normal termination = true.
-            (isNormalTermination && WEXITSTATUS(status) != 0))
-        {
-            printf("Zombie for PID -- %d failed.\n", done);
-            exit(EXIT_FAILURE);
-        }
-        else
-        {
-            printf("Zombie for PID -- %d successfully removed.\n", done);
-        }
-    }
-}
-
 int main()
 {    
     pid_t main_pid = getpid();

multithreading/01 - Signals_SIGINT_SIGTERM_nonkillable_parent.c

@@ -2,9 +2,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <sys/wait.h>
 
-#define EXIT_FAILURE 1
+#include "Common.h"
 
 pid_t child_pid;
 

multithreading/02 - Flock.c

@@ -5,45 +5,17 @@
 #include <string.h>
 #include <unistd.h>
 #include <sys/file.h>
-#include <sys/wait.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 
-#define EXIT_FAILURE 1
+#include "Common.h"
 
 // Compilation:
 // gcc "02 - Flock.c" -o flockc
 
 // This program imitates work of 3 processes (parent and 2 childs) with some file with flock-blocking, which means
 // that 2 processes cannot both write into file, but can both read file in the same time. However it cannot write and read in the same time.
 
-void kill_child_handler(int sig)
-{
-    int status;
-    pid_t done = waitpid(-1, // Any child
-                         &status,
-                         0); // Blocked mode.
-    if (done == -1)
-    {
-        printf("No more child processes.\n");
-    }
-    else
-    {
-        short isNormalTermination = WIFEXITED(status);
-        if (!isNormalTermination ||
-            // WEXITSTATUS should be used only if normal termination = true.
-            (isNormalTermination && WEXITSTATUS(status) != 0))
-        {
-            printf("Zombie for PID -- %d failed.\n", done);
-            exit(EXIT_FAILURE);
-        }
-        else
-        {
-            printf("Zombie for PID -- %d successfully removed.\n", done);
-        }
-    }
-}
-
 int lock_write()
 {
     int fd;