/*
** This short little program shows how the UNIX fork() mechanism works.
** When this program starts up, it has a stdin, stdout, and stderr that
** are associated with the terminal (and are opened by the C startup code
** before it calls the main() function).
*/

#define PARENT "parent"
#define CHILD  "child"

int main(void) {
	int pid;
	char color[10];
	char whoami[10];
	char line[80];

	write(1,"\n", 1);

	pid = fork();

	if (pid == 0) {
		/*
		** This is the child process.
		*/

		strcpy(whoami, CHILD);
		strcpy(color, "blue");

		sprintf(line, "%s: Violets are %s.\n\n", whoami, color);
		write(1, line, strlen(line));

		sprintf(line, "%s: I'm schizophrenic.\n\n", whoami);
		write(1, line, strlen(line));

	} else {
		/*
		** This is the parent process.
		*/

		strcpy(whoami, PARENT);
		strcpy(color, "red");

		sprintf(line, "%s: Roses are %s,\n\n", whoami, color);
		write(1, line, strlen(line));

		wait((int *) 0);  /* wait for child to die */

		sprintf(line, "%s: And so am I.\n\n", whoami);
		write(1, line, strlen(line));

	}

	sprintf(line, "%s: (Which flower was %s?)\n\n", whoami, color);
	write(1, line, strlen(line));

	exit(0);
}