implementing basic functionality in the shell

1 files changed, 26 insertions, 1 deletions

diff --git a/main.c b/main.c
index 9609d00..b4f02ff 100644
--- a/main.c
+++ b/main.c
@@ -5,9 +5,34 @@
 #include <dirent.h>
 #include <unistd.h>
 
+/* BOOLEANS */
 #define true 1
 #define false 0
 
+/* SIGNALS */
+#define SIGHUP  1   /* Hang up the process */ 
+#define SIGINT  2   /* Interrupt the process */ 
+#define SIGQUIT 3   /* Quit the process */ 
+#define SIGILL  4   /* Illegal instruction. */ 
+#define SIGTRAP 5   /* Trace trap. */ 
+#define SIGABRT 6   /* Abort. */
+
+void PIPELING();
+void COMMAND_EXECUTION();
+void REDIRECTION();
+void SCRIPTING();
+
+void ERROR_QUIT(char *CURRENT_COMMAND, char *COMMAND_INSTRUCTIONS)
+{
+    printf("%s", );
+    
+}
+
+void err_sys(char *string)
+{
+    printf("%s", string);
+}
+
 void PROCESS_PID()
 {
     printf("PID %ld\n", (long)getpid());
@@ -20,7 +45,7 @@ void LIST_CURRENT_DIRECTORY(int argc, char *argv[])
     if (argc != 2)
         err_quit("usage: ls directory_name");
     if ((dp = opendir(argv[1])) == NULL)
-        err_sys(  argv[1]);
+        err_sys(argv[1]);
     while ((dirp = readdir(dp)) != NULL)
         printf("%s\n", dirp->d_name);
     closedir(dp);