Initial commit

1 files changed, 90 insertions, 0 deletions

diff --git a/mkfs.md/mkfs.c b/mkfs.md/mkfs.c
new file mode 100644
index 0000000..37c6e6e
--- /dev/null
+++ b/mkfs.md/mkfs.c
@@ -0,0 +1,90 @@
+#include "../defs.h"
+#include "../inode.h"
+
+#include <fcntl.h>
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <time.h>
+
+#include <unistd.h>
+#include <sys/stat.h>
+
+struct PACKED superblock {
+    uint16_t magic;
+    uint32_t free_size;
+    uint32_t max_size;
+};
+
+int main(int argc, char *argv[])
+{
+    char *fs = NULL;
+    int fd = 0;
+    struct superblock *sb= NULL;
+    inode *rootdir = NULL;
+#ifdef _HAS_TRACKED_INODE
+    direntry *dentry = NULL;
+#endif
+
+    if (argc != 2){
+        printf("Uso: %s [file]\n"
+               "Necesita proveer un nombre para el filesystem",
+               argv[0]);
+        return -2;
+    }
+
+    fd = open(argv[1], O_WRONLY | O_CREAT, 0777);
+
+    fs = calloc (BLOCKS*BLOCK_SIZE, sizeof(char));
+    if (!fs){
+        fprintf(stderr, "No hay suficiente memoria para alocar el filesystem\n");
+        return (1);
+    }
+    sb = (struct superblock *) fs;
+
+    sb->magic = 0xF514; /* No hay ganas de hacer aritmetica con lo que esta en el defs.h */
+    sb->max_size = BLOCK_SIZE * BLOCKPOOL_BLOCKS;
+    sb->free_size = BLOCK_SIZE * BLOCKPOOL_BLOCKS;
+	SET_BIT_1((char *)sb + FBB_OFFSET, 0);
+    /* El primer elemento del inodepool es el rootdir */
+    SET_BIT_1((char*) sb + FIB_OFFSET, 1);
+	
+	
+    rootdir = (inode *) sb + INODEPOOL_OFFSET + sizeof(inode);
+    
+    rootdir->type = I_DIR;
+    rootdir->mode = S_IRUSR | S_IWUSR | S_IXUSR | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH | S_IFDIR;
+    rootdir->uid = getuid();
+    rootdir->gid = getgid();
+	rootdir->indirect=2;
+    rootdir->atime = (uint32_t) time(NULL);
+    rootdir->ctime = (uint32_t) time(NULL);
+    rootdir->mtime = (uint32_t) time(NULL);
+
+    rootdir->nlinks = 1;
+
+#ifndef _HAS_TRACKED_INODE
+    rootdir->size = 0;
+#else
+    rootdir->size = sizeof(direntry);
+    /* Primer bloque */
+    /*SET_BIT_1((char *)sb + FBB_OFFSET, 0); */
+    dentry = (direntry *) sb + BLOCKPOOL_OFFSET;
+    dentry->inode = 0;
+    dentry->name[0] = '/';
+    dentry->name[1] = '\0';
+    dentry->symlink = 0;
+#endif
+
+    if ((write(fd, (void *) fs, BLOCKS*BLOCK_SIZE)) == -1){
+        perror("write");
+        close(fd);
+        return -1;
+    }
+    close(fd);
+    free(fs);
+
+    return (0);
+}