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@@ -1,5 +1,7 @@
 # Linux-Process-API-fork-wait-exec-
+
 Ex02-Linux Process API-fork(), wait(), exec()
+
 # Ex02-OS-Linux-Process API - fork(), wait(), exec()
 Operating systems Lab exercise
 
@@ -23,73 +25,92 @@ Test the C Program for the desired output.
 
 # PROGRAM:
 
-## C Program to create new process using Linux API system calls fork() and getpid() , getppid() and to print process ID and parent Process ID using Linux API system calls
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-## C Program to execute Linux system commands using Linux API system calls exec() , exit() , wait() family
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-##OUTPUT
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+## C Program to print process ID and parent Process ID using Linux API system calls
+```c
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+int main(void)
+{	//variable to store calling function's process id
+	pid_t process_id;
+	//variable to store parent function's process id
+	pid_t p_process_id;
+	//getpid() - will return process id of calling function
+	process_id = getpid();
+	//getppid() - will return process id of parent function
+	p_process_id = getppid();
+	//printing the process ids
+
+//printing the process ids
+	printf("The process id: %d\n",process_id);
+	printf("The process id of parent function: %d\n",p_process_id);
+	return 0; }
+```
+
+## OUTPUT
+
+![image](https://github.com/Ragu-123/Linux-Process-API-fork-wait-exec/assets/113915622/ab5d4a84-ae5e-4467-8257-538498361c39)
+
+
+## C Program to create new process using Linux API system calls fork() and exit()
+```c
+#include <stdio.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include<stdlib.h>
+int main()
+{ int pid; 
+pid=fork(); 
+if(pid == 0) 
+{ printf("Iam child my pid is %d\n",getpid()); 
+printf("My parent pid is:%d\n",getppid()); 
+exit(0); } 
+else{ 
+printf("I am parent, my pid is %d\n",getpid()); 
+sleep(100); 
+exit(0);} 
+}
+```
+
+## OUTPUT
+
+![image](https://github.com/Ragu-123/Linux-Process-API-fork-wait-exec/assets/113915622/53a4d0be-3fac-4c13-acd3-d0bec420d4f6)
+
+## C Program to execute Linux system commands using Linux API system calls exec() family
+```c
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+int main()
+{       int status;
+        printf("Running ps with execlp\n");
+        execl("ps", "ps", "ax", NULL);
+        wait(&status);
+        if (WIFEXITED(status))
+                printf("child exited with status of %d\n", WEXITSTATUS(status));
+        else
+                puts("child did not exit successfully\n");
+        printf("Done.\n");
+printf("Running ps with execlp. Now with path specified\n");
+        execl("/bin/ps", "ps", "ax", NULL);
+        wait(&status);
+        if (WIFEXITED(status))
+                printf("child exited with status of %d\n", WEXITSTATUS(status));
+        else
+                puts("child did not exit successfully\n");
+        printf("Done.\n");
+        exit(0);}
+```
+
+## OUTPUT
+
+![image](https://github.com/Ragu-123/Linux-Process-API-fork-wait-exec/assets/113915622/09d3130a-e22d-4e65-80e0-779b917d3132)
+
+![image](https://github.com/Ragu-123/Linux-Process-API-fork-wait-exec/assets/113915622/617ad40a-5f5b-4ec3-b1b9-d8b2c82ed045)
+
+![image](https://github.com/Ragu-123/Linux-Process-API-fork-wait-exec/assets/113915622/d1aa6db5-d34c-4e62-ad8b-7d5f43da0d7b)
 
 
 # RESULT: