Operating Systems 2019F Lecture 3 - Revision history

Soma: /* Code */

2019-09-12T02:06:19Z

Code

← Older revision		Revision as of 02:06, 12 September 2019
Line 78:		Line 78:

	==Code==		==Code==

			===fork-demo.c===
			<source lang="c" line>
			#include <unistd.h>
			#include <stdio.h>

			int main(int argc, char *argv) {
			pid_t pid;

			pid = fork();

			if (pid == 0) {
			printf("First branch, pid = %d\n", (int) pid);
			} else {
			printf("Second branch, pid = %d\n", (int) pid);
			}

			printf("%d: After the check\n", getpid());

			return 0;
			}
			</source>

			===execve-demo.c===

			<source lang="c" line>
			#include <unistd.h>
			#include <stdio.h>

			int main(int argc, char argv[], char envp[]) {
			execve("/bin/ls", argv, envp);
			printf("All done!\n");
			return 0;
			}
			</source>

			===fork-execve-demo.c===

			<source lang="c" line>
			#include <unistd.h>
			#include <stdio.h>
			#include <sys/wait.h>

			int main(int argc, char argv[], char envp[]) {
			pid_t pid;

			pid = fork();

			if (pid == 0) {
			printf("Child, pid = %d, doing execve\n", getpid());
			execve("/bin/ls", argv, envp);
			} else {
			printf("Parent, pid = %d, will wait for child.\n",
			getpid());
			/* wait(NULL); */
			sleep(600);
			printf("%d: Child %d finished!\n",
			getpid(), (int) pid);
			}

			printf("Both parent and child could have run this "
			"but it was run by %d\n", getpid());

			return 0;
			}
			</source>

Soma at 02:03, 12 September 2019

2019-09-12T02:03:06Z

@@ Line 1: / Line 1: @@
 ==Video==
-Livestream is on [https://www.twitch.tv/anilsoma Twitch].
+Video from the lecture given on Sept. 11, 2019 [https://homeostasis.scs.carleton.ca/~soma/os-2019f/lectures/comp3000-2019f-lec03-20190911.m4v is now available].
 ==Topics==
@@ Line 8: / Line 8: @@
 * system calls
 * process abstraction

Soma: Created page with "==Video== Livestream is on [https://www.twitch.tv/anilsoma Twitch]. ==Topics== * supervisor and user mode * system calls * process abstraction"

2019-09-11T20:11:15Z

Created page with "==Video== Livestream is on [https://www.twitch.tv/anilsoma Twitch]. ==Topics== * supervisor and user mode * system calls * process abstraction"

New page

==Video==

Livestream is on [https://www.twitch.tv/anilsoma Twitch].

==Topics==

* supervisor and user mode
* system calls
* process abstraction