wrote base functions

main.c

@@ -0,0 +1,39 @@
+#include<stdio.h>
+#include<stdlib.h>
+#include<sys/wait.h>
+#include<unistd.h>
+#include<string.h>
+char **parse(char *line) {
+  char **args= malloc(64 * sizeof(char *));
+  int i = 0;
+  char *token = strtok(line, " \t\n");
+  while(token !=NULL) {
+    args[i] = token;
+    i++;
+    token = strtok(NULL, " \t\n");
+  }
+  args[i] = NULL;
+  return args;
+}
+int main() {
+	char line[1024];
+	while(1) {
+		printf("$");
+		fflush(stdout);
+		char *result = fgets(line, sizeof(line), stdin);
+		if(result == NULL) return 0;
+		char **parsed = parse(line);
+		if(parsed[0] == NULL) { free(parsed); continue; }
+		pid_t pid = fork();
+		if(pid == 0) {
+		  if(execvp(parsed[0], parsed) == -1 ) {
+		    perror("tinysh");
+		    exit(1);
+		  }
+		} else if(pid > 0) {
+		  wait(NULL);
+		}
+		free(parsed);
+	}
+}	
+