- readme. todo

- update pwd
- update SHLVL
- basename pwd in prompt
  - updating pwd

1 files changed, 36 insertions, 0 deletions

diff --git a/src/helper_functions.c b/src/helper_functions.c
index 9427b87..5c81f15 100644
--- a/src/helper_functions.c
+++ b/src/helper_functions.c
@@ -1,6 +1,8 @@
 #ifndef shell_helper_functions
 #define shell_helper_functions
 
+#include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
 
@@ -51,4 +53,38 @@ char *str_replace(char *orig, char *rep, char *with) {
     return result;
 }
 
+char *basename(char *path_in) 
+{
+    char *token = NULL;
+    char *lastToken = NULL;
+    char *basePath;
+
+    basePath = (char *)malloc(sizeof(char) * (strlen(path_in) + 1));
+    if (!basePath) {
+        fprintf(stderr, "lsh: allocatin error\n");
+        exit(EXIT_FAILURE);
+    }
+    strcpy(basePath, path_in);
+
+    token = strtok(basePath, "/");
+    while (token != NULL) {
+        lastToken = token;
+        token = strtok(NULL, "/");
+    }
+
+    if (lastToken == NULL){
+        free(basePath);
+        return NULL;
+    }
+
+    char *ret_str = (char*)malloc(sizeof(char)*strlen(lastToken)+1);
+    if (!ret_str) {
+        fprintf(stderr, "lsh: allocation error\n");
+        exit(EXIT_FAILURE);
+    }
+    strcpy(ret_str,lastToken);
+    free(basePath);
+    return ret_str;
+}
+
 #endif