Added piping and redirection

Makefile

@@ -1,5 +1,5 @@
-output: shell.o tokenize.o parse.o builtin.o execute_command.o signal_handlers.o prompt.o ls.o nightswatch.o history.o user_defined_commands.o
-	gcc -g shell.o tokenize.o parse.o builtin.o execute_command.o signal_handlers.o prompt.o ls.o nightswatch.o history.o user_defined_commands.o -o exe
+output: shell.o tokenize.o parse.o builtin.o execute_command.o signal_handlers.o prompt.o ls.o nightswatch.o history.o user_defined_commands.o simple_commands_util.o pipe_redirection.o
+	gcc -g shell.o tokenize.o parse.o builtin.o execute_command.o signal_handlers.o prompt.o ls.o nightswatch.o history.o user_defined_commands.o simple_commands_util.o pipe_redirection.o -o exe
 
 shell.o: shell.c
 	gcc -g -c shell.c
@@ -25,6 +25,12 @@ builtin.o: builtin.c
 prompt.o: prompt.c
 	gcc -g -c prompt.c
 
+pipe_redirection.o: pipe_redirection.c
+	gcc -g -c pipe_redirection.c
+
+simple_commands_util.o: simple_commands_util.c
+	gcc -g -c simple_commands_util.c
+
 user_defined_commands.o: user_defined_commands.c
 	gcc -g -c user_defined_commands.c
 

execute_command.c

@@ -13,8 +13,24 @@ int check_builtin_command(char *cmd)
     return -1;
 }
 
+int check_piping_and_redirection(char **args, int arg_count)
+{
+    for (int i = 0; i < arg_count; ++i)
+    {
+        if (strcmp(args[i], ">") == 0 || strcmp(args[i], ">>") == 0 || strcmp(args[i], "<") == 0 || strcmp(args[i], "|") == 0)
+            return 1;
+    }
+
+    return 0;
+}
+
 int execute_command(char **args, int arg_count)
 {
+    if (check_piping_and_redirection(args, arg_count) == 1)
+    {
+        return piping_and_redirection(args, arg_count);
+    }
+
     strcpy(cmd_name, args[0]);
 
     int builtin_command = check_builtin_command(args[0]);

headers.h

@@ -41,6 +41,23 @@ static struct background_jobs ongoing_background_jobs[MAX_JOBS];
 
 int cur_jobs;
 
+struct simple_commands
+{
+    int cnt_args;
+    char *cmd[BUFFER_SIZE];
+    struct simple_commands *next;
+};
+
+struct simple_commands *head, *tail;
+
+struct simple_commands *create_new_command();
+void add_new_command(struct simple_commands *node);
+void pop_command();
+void show_commands();
+void clear_commands();
+
+int piping_and_redirection(char **args, int arg_count);
+
 int execute_command(char **args, int);
 int check_builtin_command(char *cmd);
 

history.txt

@@ -1,21 +1,21 @@
 20
-jobs
-fg 1
-clear
+cat shell.c > d.txt
 quit
+cat < shell.c
+cat < shell.c > d.txt
+ls -l | wc > d.txt
+sort < shell.c | wc -l >> d.txt
+pinfo
+pwd
 ls
+ls -a -l
+nightswatch -n 2 newborn
 clear
-emacs &
-jobs
-emacs
-jobs
-bg 2
-jobs
-fg 1
-jobs
-kill 1 9
-kill 9 1
-kjon 1 9
-kjob 1 9
-jobs
+quit
+ls | wc
+ls | wc -l
+quit
+ls | wc
+cat < tokenize.c > d.txt
+rm d.txt
 quit