docs/USERS.md

@@ -114,6 +114,10 @@ Makes a cow speak!
 
 Computes Pi up to a couple of digits using the Leibniz series; takes one integer argument, the number of terms of the series to compute.
 
+#### `bmp <file>`
+
+Shows information about a 24-bit BMP image and renders it in the terminal.
+
 ### Initrd utilities
 
 You can browse the (really) simple TAR filesystem with the following commands:

src/kernel/initrd.c

@@ -67,15 +67,25 @@ void tar_find_file(uint8_t *tar_start, const char* filename)
 	printf("[tar] file '%s' not found\n", filename);
 }
 
-void ls_initrd(uint8_t* initrd)
+void ls_initrd(uint8_t* initrd, int verbose)
 {
 	tar_header_t *header = (tar_header_t*)initrd;
 	
+	if (verbose)
+	{
+		puts("Size       Type  Filename\n");
+	}
+
 	while (header->filename[0] != '\0')
 	{
-		printf("%s\n", header->filename);
-		uint32_t size = tar_parse_size(header->size);
+		if (!verbose)
+		{
+			printf("%s\n", header->filename);
+		} else {
+			printf("%7d\t%c\t %s\n", header->size, header->typeflag, header->filename);
+		}
 
+		uint32_t size = tar_parse_size(header->size);
 		uint32_t next_file_offset = ((size+TAR_BLOCK_SIZE-1)/TAR_BLOCK_SIZE)*TAR_BLOCK_SIZE;
 		header = (tar_header_t*)((uint8_t*)header + next_file_offset + TAR_BLOCK_SIZE);
 	}

src/kernel/initrd.h

@@ -31,7 +31,7 @@ typedef struct
 } tar_header_t;
 
 void tar_find_file(uint8_t *tar_start, const char* filename);
-void ls_initrd(uint8_t* initrd);
+void ls_initrd(uint8_t* initrd, int verbose);
 void cat_initrd(uint8_t* initrd, const char* filename);
 int tar_file_to_buffer(uint8_t* initrd, const char* filename, char* buffer);
 

src/programs/fs.c

@@ -6,10 +6,16 @@
 #include "../kernel/initrd.h"
 #include "../kernel/kmain.h"
 #include "../libc/stdio.h"
+#include "../libc/string.h"
 
-void program_ls()
+void program_ls(int argc, char* argv[])
 {
-	ls_initrd((uint8_t*)initrd_addr);
+	if (argc == 1)
+	{
+		ls_initrd((uint8_t*)initrd_addr, 0);
+	} else if (argc == 2 && strcmp(argv[1], "-l") == 0) {
+		ls_initrd((uint8_t*)initrd_addr, 1);
+	}
 }
 
 // Basic cat just to read, no concatenation here