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Program that shows how fork system call works



Program that shows how fork system call works

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>

int main(void)
{
        pid_t pid;
	char cwdir_cld[100];
	char cwdir_prt[100];

	if ((pid = fork()) < 0) {
	        perror("fork error");
		exit(1);
	}

	if (pid == 0) {
	  /* 
	   *  Now we are in the childs thread 
	   *  let us issue a chdir syscall :)
	   */
                if(chdir("/tmp") < 0) {
	                perror("chdir error");
		}
		
		/* 
		 * Let us now print the current working directory of the child
		 */
		if (getcwd(cwdir_cld, 100) != NULL) {
		        printf("
Current working directory of the child is : %s", cwdir_cld);
		} else {
		        perror("
getcwd error");
		}
		
	 /* end of the child */
	} else {
	  /* 
	   * Now we are in the parent thread
	   * Let is check the current working directory
	   */
	        if (getcwd(cwdir_prt, 100) != NULL) {
		        printf("
Current working directory of the parent is : %s", cwdir_prt);
		} else {
		        perror("
getcwd error");
		}
	}

        printf("
");
	return(0);
}

C Calculate the Sum of the Array Elements - C Program code calculates the sum of array elements using pointer. The program uses the pointer to traverse the array and adds up the element values there. C program to read

No sort, but reversing a [linked list] c code - Code add a lnode at the beginning of the list. Reverse the whole list. Display the whole linked list. Insert some numbers. Add a lnode at the beginning of the list. Add new node.

Checks the Connectivity of Directed Graph - Add Edge to connect "v" and "w". A recursive function to print BFS starting from s. Returns reverse ('or transpose') of this graph. Check if graph is connected. Print graph is connected.

Evaluates the Value of Any Polynomial of - Give the degree of the polynomiala. Give the value of the coefficients. Give the value of the coefficients. Give the values of the coefficient of polynomialb. Give value to be substituted

Switch Case Statements Break Statement - Lets see a sample without break statement, then we will discuss switch case with break 'Switch Case' statement is mostly used with 'break statement' even though the break is

Converting Binary Octal in C++ Language - To convert binary to octal in C++, you have to ask to the user to enter any number in binary to "convert it into octal" to display equivalent value in octal on the screen as shown in code

C++ Programming Code for Selection Sort - Here, we use 'swapping' of the elements with the help of a Variable say temp of same type. That is, on found, start 'Swapping' with temp variable, place the first number in the temp &

C Code Implement a Queue using an Array - C program code ask the user for operation like insert, delete, display and exit. According to the option entered, access its respective function using switch statement and use the