add: create disk

.gitignore

@@ -1,2 +1,3 @@
 obj/*
-seyshell
+seyshell
+disk

Makefile

@@ -1,4 +1,5 @@
 NAME        := seyshell
+DRIVE       := disk
 CC          := gcc 
 CFLAGS      := -Wall -Wextra -Werror -g
 OBJ_DIR     := obj
@@ -20,7 +21,7 @@ clean:
 	@rm -rf $(OBJ_DIR)
 
 fclean: clean
-	@rm -f $(NAME)
+	@rm -f $(NAME) $(DRIVE)
 
 re: fclean all
 

src/const.h

@@ -1,8 +1,10 @@
 #define BUFSIZE 1024
-#define MAX_BLOCS_PER_INODE 30
+#define MAX_BLOCS 30
 #define MAX_BYTES_PER_BLOC 1024
+#define MAX_INODE 10
 
-#define FILE 0
-#define BINARY 1
-#define DIRECTORY 2
-#define SYMBOLIC_LINK 3
+#define TYPE_NULL 0
+#define TYPE_FILE 1
+#define TYPE_BINARY 2
+#define TYPE_DIRECTORY 3
+#define TYPE_SYMBOLIC_LINK 4

src/disk.c

@@ -0,0 +1,40 @@
+#include "disk.h"
+#include "struct.h"
+#include <stdio.h>
+#include <unistd.h>
+
+disk create_disk() {
+  FILE *fptr;
+  fptr = fopen("disk", "wb");
+
+  disk d;
+  for (int i = 0; i < MAX_INODE; i++) {
+    d.inodes[i].filetype = TYPE_NULL;
+    d.inodes[i].perms = 0b000000000;
+    for (int j = 0; j < MAX_BLOCS; j++) {
+      d.inodes[i].blocs[j] = -1;
+    }
+  }
+
+  // création de la racine '/'
+  d.inodes[0].filetype = TYPE_DIRECTORY;
+  d.inodes[0].perms = 0b111111111; // tlm fait ce qu'il veut
+  d.inodes[0].blocs[0] = 0; // utilise le bloc 0
+  
+
+  int n = fwrite(&d, sizeof(disk), 1, fptr);
+  if (n == 1) {
+    dprintf(STDOUT_FILENO, "Disk of size %.2fKb created successfully.\n", (float)(MAX_BYTES_PER_BLOC*MAX_BLOCS)/1000);
+  }
+
+  fclose(fptr);
+  return d;
+}
+
+disk open_disk(char* filename) {
+  disk d;
+  FILE *fptr = fopen(filename, "r");
+  fread(&d, sizeof(d),1, fptr);
+  fclose(fptr);
+  return d;
+}

src/disk.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <stdio.h>
+#include "const.h"
+#include "struct.h"
+
+disk create_disk();
+disk open_disk(char* filename);

src/main.c

@@ -1,3 +1,4 @@
+#include "disk.h"
 #include "parsing.h"
 #include <stdio.h>
 #include <stdlib.h>
@@ -7,7 +8,15 @@ int main(int argc, char *argv[], char *envp[]) {
   (void)argv;
   (void)envp;
 
-  shell_loop();
+  // shell_loop();
+
+  disk drive;
+  if (access("disk", F_OK) == 0)
+    drive = open_disk("disk");
+  else
+    drive = create_disk();
+
+  (void)drive;
 
   return EXIT_SUCCESS;
 }

src/struct.h

@@ -2,9 +2,9 @@
 #include "const.h"
 
 typedef struct inode {
-  char perms[8]; // rwxrwxrwx
-  char filetype; // d, -, l
-  int blocs[MAX_BLOCS_PER_INODE];
+  unsigned short perms; // rwxrwxrwx
+  char filetype;
+  int blocs[MAX_BLOCS];
 } inode;
 
 typedef struct bloc {
@@ -12,9 +12,9 @@ typedef struct bloc {
 } bloc;
 
 typedef struct disk {
-  inode inodes[10];
-  bloc blocs[30];
+  inode inodes[MAX_INODE];
+  bloc blocs[MAX_BLOCS];
 } disk;
 
-// pour 10 inode qui a 30 blocs de chacun 1024 octets, on a 307200 octets, soit
-// 307,2 Ko sur le disque
+// pour 10 inode qui a 30 blocs de chacun 1024 octets, on a 30720 octets, soit
+// 30,7 Ko sur le disque