diff --git a/mark b/mark
deleted file mode 100755
index 23823a8..0000000
--- a/mark
+++ /dev/null
@@ -1,54 +0,0 @@
-#!/bin/bash
-
-BOOKMARKS_FILE=~/.bookmarks
-
-# Catch any invalid input.
-if [[ $# -gt 1 ]]; then
-    echo "Improper usage: mark { -ls | -rm [ keyword ] }"
-    echo "      eg. mark"
-    echo "      eg. mark -ls"
-    echo "      eg. mark -rm portfolio"
-    echo "      eg. mark -h"
-    echo "      eg. mark --help"
-
-    exit
-
-# Help page
-elif [[ $1 == "-h" || $1 == "--help" ]]; then
-    echo "\nCreate and manage persistent bookmarks inside of terminal sessions.\n"
-    echo "Usage:"
-    echo "      mark"
-    echo "      mark -ls"
-    echo "          eg. run main"
-    echo "      mark -rm [ keyword ]"
-    echo "          eg. mark -rm portfolio"
-    echo "      mark -h"
-    echo "      mark --help"
-
-    exit
-
-# Add a bookmark to the bookmarks file.
-elif [ $# == 0 ]; then
-    echo $(pwd) >> $BOOKMARKS_FILE
-
-# List bookmarks stored in the bookmarks file.
-elif [ "$1" == "-ls" ]; then
-    echo "Bookmarks:"
-    cat $BOOKMARKS_FILE
-
-# Remove a bookmark stored in the bookmarks file.
-elif [ "$1" == "-rm" ]; then
-    # The user is trying to remove a single bookmark
-    # Check if the bookmark exists
-    if [ $(grep -c "$2" $BOOKMARKS_FILE) -gt 0 ]; then
-
-      # Remove the bookmark
-      sed -i .bak $2d $BOOKMARKS_FILE
-    else
-      echo "Bookmark not found"
-    fi
-
-# Invalid argument, display an error message
-else
-    echo "Usage: mark [-ls] [-rm [number | number TO number]]"
-fi
diff --git a/src/mark.c b/src/mark.c
new file mode 100644
index 0000000..0cfe48c
--- /dev/null
+++ b/src/mark.c
@@ -0,0 +1,86 @@
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
+#include <stdlib.h>
+
+// Displays error message upon improper usage.
+void error() {
+    printf("\nImproper usage: mark { -ls | -rm [ keyword(s) ] }\n"
+           "    Usage:\n"
+           "        mark\n"
+           "        mark -ls\n"
+           "        mark -rm [ keyword ]\n"
+           "        mark -h\n"
+           "        mark --help"
+           );
+}
+
+// Displays help message.
+void help() {
+    printf("\nCreate and manage persistent bookmarks in the terminal.\n"
+           "Usage:\n"
+           "    mark\n"
+           "    mark -ls\n"
+           "    mark -rm [ keyword ]\n"
+           "    mark -h\n"
+           "    mark --help"
+           );
+}
+
+// Lists all bookmarks in file.
+void list(FILE * f) {
+    int c;
+    printf("Bookmarks:\n");
+    while(1) {
+        c = fgetc(f);
+        if(feof(f)) break;
+        printf("%c", c);
+    }
+}
+
+// Removes a bookmark from the file.
+void removeMark(FILE * f, char *argv[]) {
+    printf("remove mark function not implemented. received input to remove: %s.", argv[2]); // TODO: Need to implement.
+}
+
+int main(int argc, char *argv[]) {
+    char * bookmarksFile = strcat(getenv("HOME"), "/.bookmarks");
+    FILE * f = fopen(bookmarksFile, "a+");
+
+    // Unable to access file.
+    if(f == NULL) {
+        printf("Error accessing file located at %s.", bookmarksFile);
+        return 1;
+    }
+
+    // Invalid number of arguments.
+    else if(argc > 2 && strcmp(argv[1], "-rm") != 0) {
+        error();
+        return 1;
+    }
+
+    // Append the current directory to the bookmarks file.
+    else if(argc == 1) {
+        char cwd[PATH_MAX];
+        fprintf(f, getcwd(cwd, sizeof(cwd)));
+        printf("Successfully bookmarked %s.", cwd);
+    }
+
+    // Display help.
+    else if(strcmp(argv[1], "-h") == 0 || strcmp(argv[1], "--help") == 0) help();
+
+    // List bookmarks.
+    else if(strcmp(argv[1], "-ls") == 0) list(f);
+
+    else if(strcmp(argv[1], "-rm") == 0) removeMark(f, argv);
+
+    // Invalid argument.
+    else {
+        error();
+        return 1;
+    }
+
+    fclose(f);
+    return 0;
+}