add comments

src/console_line.c

@@ -21,12 +21,20 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+/**
+ * Get the logged in user's username.
+ * @return Returns the logged in user's username.
+ */
 char *get_user() {
     struct passwd *pass;
     pass = getpwuid(getuid());
     return pass->pw_name;
 }
 
+/**
+ * Get the current working directory of the shell.
+ * @return Returns the current working directory.
+ */
 char *get_working_directory() {
     char *cwd = NULL;
     cwd = getcwd(NULL, PATH_MAX);
@@ -39,6 +47,9 @@ char *get_working_directory() {
     }
 }
 
+/**
+ * Print the console line before the user input.
+ */
 void print_input_line() {
     char *name = get_user();
     char *cwd = get_working_directory();

src/loop.c

@@ -19,10 +19,17 @@
 #include <string.h>
 #include "console_line.h"
 
+/**
+ * Remove new line from the end of a string.
+ * @param line The string to remove the new line from.
+ */
 void remove_new_line(char* line) {
     line[strcspn(line, "\n")] = 0;
 }
 
+/**
+ * This is the loop that checks for user input and acts on it.
+ */
 void loop() {
     size_t buffer_size = 0;
     char *line = NULL;

src/myshellin.c

@@ -16,6 +16,11 @@
 #include <stdlib.h>
 #include "loop.h"
 
+/**
+ * The main entry point to the program.
+ * @param argc The number of arguments passed.
+ * @return Returns 0 on success or an error code on failure.
+ */
 int main(int argc, char **argv) {
     loop();
     return EXIT_SUCCESS;