Create dircomp

dircomp.c

@@ -0,0 +1,104 @@
+/*
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <dirent.h>
+
+struct arguments{
+    char* directory1;
+    char* directory2;
+	bool r; // recursive
+	bool n; // compare names only
+	bool s; // compare hashes only
+	bool v; // verbose (default, at the moment)
+	bool h; // help
+};
+
+struct arguments get_arguments(int, char**);
+void print_help(void);
+void print_files_in_directory(char*, struct arguments);
+
+int main(int argc, char* argv[]){
+  	struct arguments arguments = get_arguments(argc, argv);
+  	
+  	if(arguments.h == true)
+  		return 0;
+	
+	print_files_in_directory("/home/user", arguments);
+  	
+  	return 0;
+}
+
+struct arguments get_arguments(int argc, char** argv){
+	struct arguments provided_arguments = {"", "", false, false, false, true, false};
+    char option;
+    while((option = getopt(argc, argv, "rnsvh")) != -1){
+      switch(option){
+         case 'r':
+             provided_arguments.r = true;
+             break;
+         case 'n':
+             provided_arguments.n = true;
+             break;
+         case 's':
+            provided_arguments.s = true;
+            break;
+      	 case 'v':
+      	 	provided_arguments.v = true;
+      	 	break;
+      	 case 'h':
+      	 	provided_arguments.h = true;
+      	 	print_help();
+      	 	break;
+      }
+   }
+   return provided_arguments;
+}
+
+void print_help(void){
+	printf("Usage: dircomp directory1 directory2 [-r] [-n] [-s] [-v] [-h]\n\n");
+	printf("  -r \t\t Recursive\n");
+	printf("  -n \t\t Compare file names only\n");
+	printf("  -s \t\t Compare file hashes only\n");
+	printf("  -v \t\t Verbose\n");
+	printf("  -h \t\t Print this help and quit\n\n");
+}
+
+/*
+*	References:
+*	https://www.gnu.org/software/libc/manual/html_node/Directory-Entries.html
+*/
+void print_files_in_directory(char* directory, struct arguments arguments){
+	printf("\nAnalyzing directory %s\n", directory);
+  	DIR *d;
+  	struct dirent *dir;
+  	d = opendir(directory);
+  	if (d) {
+    	while ((dir = readdir(d)) != NULL) {
+    
+    		// is file
+    		if (dir -> d_type == DT_REG)
+  			{
+  				if(arguments.v == true)
+     				printf("Analyzing file: %s\n", dir -> d_name);
+  			}
+  	
+  			// is directory
+  			if (dir->d_type == DT_DIR)
+  			{
+  				if(arguments.r == true)
+  					print_files_in_directory(dir -> d_name, arguments); // todo, pass the pointer to reduce memory usage
+  			}
+  		
+    	}
+	closedir(d);
+  }
+}