add ls in mshell

fs/initrd.c

@@ -123,9 +123,10 @@ static ssize_t initrd_read(fildes_t* file, uint8_t* buffer, size_t size)
 						if (count > index) {
 							k=0;
 							do { 
-								buffer[k] = dirent->name[0];
+								buffer[k] = dirent->name[k];
 								k++;
 							} while(dirent->name[k] != '\0');
+							file->offset++;
 							return k;
 						}
 					}

newlib/examples/mshell.c

@@ -22,6 +22,7 @@
 #include <unistd.h>
 #include <errno.h>
 #include <ctype.h>
+#include <dirent.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <sys/stat.h>
@@ -41,6 +42,7 @@ void help() {
 	printf("cd <path> :\t change current working directory to path\n");
 	printf("pwd       :\t show current working directory\n");
 	printf("cat <path>:\t print files\n");
+	printf("cat <path>:\t list directories\n");
 	printf("help      :\t this short help\n");
 	printf("exit      :\t exit the shell \n");
 }
@@ -129,7 +131,6 @@ void ms_setcwd(char* path) {
 	setenv("PWD", newpath, 1);
 }
 
-
 int ms_cat(char* filename)
 {
 	int fd, r = 0;
@@ -153,6 +154,30 @@ int ms_cat(char* filename)
 	return 0;
 }
 
+int ms_ls(char* dirname)
+{
+	DIR* dir;
+	dirent_t* dirent;
+
+	dir = opendir(dirname);
+	if (dir < 1) {
+		printf("ls: No such file or directory");
+		printf("\n");
+		return -1;
+	}
+
+	do {
+		dirent = readdir(dir);
+		if (dirent == NULL)
+			break;
+		printf("%s", dirent->d_name);
+		printf("\n");
+	} while (dirent != NULL);
+
+	closedir(dir);
+	return 0;
+}
+
 int main(int argc, char** argv)
 {
 	char  commandline[MAXCMDLINE];
@@ -185,6 +210,8 @@ int main(int argc, char** argv)
 			ms_setcwd(newargv[1]);
 		} else if (!strcmp(command, "cat")) {
 			ms_cat(newargv[1]);
+		} else if (!strcmp(command, "ls")) {
+			ms_ls(newargv[1]);
 		} else {
 			char path[MAXPATH];
 			sprintf(path, "/bin/%s", command);