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authorDavid Woodhouse <dwmw2@shinybook.infradead.org>2006-04-11 19:09:16 -0400
committerDavid Woodhouse <dwmw2@shinybook.infradead.org>2006-04-11 19:09:16 -0400
commit72212c137c574b564723327af751c4054c7cfca6 (patch)
tree13be2da9d4be695002d6ea9c396660c986e5fa5c /mkfs.jffs.c
Initial commit
Diffstat (limited to 'mkfs.jffs.c')
-rw-r--r--mkfs.jffs.c739
1 files changed, 739 insertions, 0 deletions
diff --git a/mkfs.jffs.c b/mkfs.jffs.c
new file mode 100644
index 0000000..942a093
--- /dev/null
+++ b/mkfs.jffs.c
@@ -0,0 +1,739 @@
+/*
+ * Build a JFFS image in a file, from a given directory tree.
+ *
+ * By default, builds an image that is of the same endianness as the
+ * host.
+ * The -a option can be used when building for a target system which
+ * has a different endianness than the host.
+ */
+
+/* $Id: mkfs.jffs.c,v 1.15 2005/11/07 11:15:13 gleixner Exp $ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <unistd.h>
+#include <linux/types.h>
+#include <asm/byteorder.h>
+#include <ctype.h>
+
+#define swab16(x) \
+ ((__u16)( \
+ (((__u16)(x) & (__u16)0x00ffU) << 8) | \
+ (((__u16)(x) & (__u16)0xff00U) >> 8) ))
+#define swab32(x) \
+ ((__u32)( \
+ (((__u32)(x) & (__u32)0x000000ffUL) << 24) | \
+ (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | \
+ (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | \
+ (((__u32)(x) & (__u32)0xff000000UL) >> 24) ))
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define cpu_to_le16(x) ({ __u16 _x = x; swab16(_x); })
+#define cpu_to_le32(x) ({ __u32 _x = x; swab32(_x); })
+#define cpu_to_be16(x) (x)
+#define cpu_to_be32(x) (x)
+#else
+#define cpu_to_le16(x) (x)
+#define cpu_to_le32(x) (x)
+#define cpu_to_be16(x) ({ __u16 _x = x; swab16(_x); })
+#define cpu_to_be32(x) ({ __u32 _x = x; swab32(_x); })
+#endif
+#define le32_to_cpu(x) cpu_to_le32(x)
+#define be32_to_cpu(x) cpu_to_be32(x)
+
+#define BLOCK_SIZE 1024
+#define JFFS_MAGIC 0x34383931 /* "1984" */
+#define JFFS_MAX_NAME_LEN 256
+#define JFFS_MIN_INO 1
+#define JFFS_TRACE_INDENT 4
+#define JFFS_ALIGN_SIZE 4
+static int MAX_CHUNK_SIZE = 32768;
+
+/* How many padding bytes should be inserted between two chunks of data
+ on the flash? */
+#define JFFS_GET_PAD_BYTES(size) ((JFFS_ALIGN_SIZE \
+ - ((__u32)(size) % JFFS_ALIGN_SIZE)) \
+ % JFFS_ALIGN_SIZE)
+
+
+struct jffs_raw_inode
+{
+ __u32 magic; /* A constant magic number. */
+ __u32 ino; /* Inode number. */
+ __u32 pino; /* Parent's inode number. */
+ __u32 version; /* Version number. */
+ __u32 mode; /* file_type, mode */
+ __u16 uid;
+ __u16 gid;
+ __u32 atime;
+ __u32 mtime;
+ __u32 ctime;
+ __u32 offset; /* Where to begin to write. */
+ __u32 dsize; /* Size of the file data. */
+ __u32 rsize; /* How much are going to be replaced? */
+ __u8 nsize; /* Name length. */
+ __u8 nlink; /* Number of links. */
+ __u8 spare : 6; /* For future use. */
+ __u8 rename : 1; /* Is this a special rename? */
+ __u8 deleted : 1; /* Has this file been deleted? */
+ __u8 accurate; /* The inode is obsolete if accurate == 0. */
+ __u32 dchksum; /* Checksum for the data. */
+ __u16 nchksum; /* Checksum for the name. */
+ __u16 chksum; /* Checksum for the raw_inode. */
+};
+
+
+struct jffs_file
+{
+ struct jffs_raw_inode inode;
+ char *name;
+ unsigned char *data;
+};
+
+
+char *root_directory_name = NULL;
+int fs_pos = 0;
+int verbose = 0;
+
+#define ENDIAN_HOST 0
+#define ENDIAN_BIG 1
+#define ENDIAN_LITTLE 2
+int endian = ENDIAN_HOST;
+
+static __u32 jffs_checksum(void *data, int size);
+void jffs_print_trace(const char *path, int depth);
+int make_root_dir(FILE *fs, int first_ino, const char *root_dir_path,
+ int depth);
+void write_file(struct jffs_file *f, FILE *fs, struct stat st);
+void read_data(struct jffs_file *f, const char *path, int offset);
+int mkfs(FILE *fs, const char *path, int ino, int parent, int depth);
+
+
+static __u32
+jffs_checksum(void *data, int size)
+{
+ __u32 sum = 0;
+ __u8 *ptr = (__u8 *)data;
+
+ while (size-- > 0)
+ {
+ sum += *ptr++;
+ }
+
+ return sum;
+}
+
+
+void
+jffs_print_trace(const char *path, int depth)
+{
+ int path_len = strlen(path);
+ int out_pos = depth * JFFS_TRACE_INDENT;
+ int pos = path_len - 1;
+ char *out = (char *)alloca(depth * JFFS_TRACE_INDENT + path_len + 1);
+
+ if (verbose >= 2)
+ {
+ fprintf(stderr, "jffs_print_trace(): path: \"%s\"\n", path);
+ }
+
+ if (!out) {
+ fprintf(stderr, "jffs_print_trace(): Allocation failed.\n");
+ fprintf(stderr, " path: \"%s\"\n", path);
+ fprintf(stderr, "depth: %d\n", depth);
+ exit(1);
+ }
+
+ memset(out, ' ', depth * JFFS_TRACE_INDENT);
+
+ if (path[pos] == '/')
+ {
+ pos--;
+ }
+ while (path[pos] && (path[pos] != '/'))
+ {
+ pos--;
+ }
+ for (pos++; path[pos] && (path[pos] != '/'); pos++)
+ {
+ out[out_pos++] = path[pos];
+ }
+ out[out_pos] = '\0';
+ fprintf(stderr, "%s\n", out);
+}
+
+
+/* Print the contents of a raw inode. */
+void
+jffs_print_raw_inode(struct jffs_raw_inode *raw_inode)
+{
+ fprintf(stderr, "jffs_raw_inode: inode number: %u\n", raw_inode->ino);
+ fprintf(stderr, "{\n");
+ fprintf(stderr, " 0x%08x, /* magic */\n", raw_inode->magic);
+ fprintf(stderr, " 0x%08x, /* ino */\n", raw_inode->ino);
+ fprintf(stderr, " 0x%08x, /* pino */\n", raw_inode->pino);
+ fprintf(stderr, " 0x%08x, /* version */\n", raw_inode->version);
+ fprintf(stderr, " 0x%08x, /* mode */\n", raw_inode->mode);
+ fprintf(stderr, " 0x%04x, /* uid */\n", raw_inode->uid);
+ fprintf(stderr, " 0x%04x, /* gid */\n", raw_inode->gid);
+ fprintf(stderr, " 0x%08x, /* atime */\n", raw_inode->atime);
+ fprintf(stderr, " 0x%08x, /* mtime */\n", raw_inode->mtime);
+ fprintf(stderr, " 0x%08x, /* ctime */\n", raw_inode->ctime);
+ fprintf(stderr, " 0x%08x, /* offset */\n", raw_inode->offset);
+ fprintf(stderr, " 0x%08x, /* dsize */\n", raw_inode->dsize);
+ fprintf(stderr, " 0x%08x, /* rsize */\n", raw_inode->rsize);
+ fprintf(stderr, " 0x%02x, /* nsize */\n", raw_inode->nsize);
+ fprintf(stderr, " 0x%02x, /* nlink */\n", raw_inode->nlink);
+ fprintf(stderr, " 0x%02x, /* spare */\n",
+ raw_inode->spare);
+ fprintf(stderr, " %u, /* rename */\n",
+ raw_inode->rename);
+ fprintf(stderr, " %u, /* deleted */\n",
+ raw_inode->deleted);
+ fprintf(stderr, " 0x%02x, /* accurate */\n",
+ raw_inode->accurate);
+ fprintf(stderr, " 0x%08x, /* dchksum */\n", raw_inode->dchksum);
+ fprintf(stderr, " 0x%04x, /* nchksum */\n", raw_inode->nchksum);
+ fprintf(stderr, " 0x%04x, /* chksum */\n", raw_inode->chksum);
+ fprintf(stderr, "}\n");
+}
+
+static void write_val32(__u32 *adr, __u32 val)
+{
+ switch(endian) {
+ case ENDIAN_HOST:
+ *adr = val;
+ break;
+ case ENDIAN_LITTLE:
+ *adr = cpu_to_le32(val);
+ break;
+ case ENDIAN_BIG:
+ *adr = cpu_to_be32(val);
+ break;
+ }
+}
+
+static void write_val16(__u16 *adr, __u16 val)
+{
+ switch(endian) {
+ case ENDIAN_HOST:
+ *adr = val;
+ break;
+ case ENDIAN_LITTLE:
+ *adr = cpu_to_le16(val);
+ break;
+ case ENDIAN_BIG:
+ *adr = cpu_to_be16(val);
+ break;
+ }
+}
+
+static __u32 read_val32(__u32 *adr)
+{
+ __u32 val = 0;
+
+ switch(endian) {
+ case ENDIAN_HOST:
+ val = *adr;
+ break;
+ case ENDIAN_LITTLE:
+ val = le32_to_cpu(*adr);
+ break;
+ case ENDIAN_BIG:
+ val = be32_to_cpu(*adr);
+ break;
+ }
+ return val;
+}
+
+
+/* This function constructs a root inode with no name and
+ no data. The inode is then written to the filesystem
+ image. */
+int
+make_root_dir(FILE *fs, int first_ino, const char *root_dir_path, int depth)
+{
+ struct jffs_file f;
+ struct stat st;
+
+ if (stat(root_dir_path, &st) < 0)
+ {
+ perror("stat");
+ exit(1);
+ }
+
+ write_val32(&f.inode.magic, JFFS_MAGIC);
+ write_val32(&f.inode.ino, first_ino);
+ write_val32(&f.inode.pino, 0);
+ write_val32(&f.inode.version, 1);
+ write_val32(&f.inode.mode, st.st_mode);
+ write_val16(&f.inode.uid, 0); /* root */
+ write_val16(&f.inode.gid, 0); /* root */
+ write_val32(&f.inode.atime, st.st_atime);
+ write_val32(&f.inode.mtime, st.st_mtime);
+ write_val32(&f.inode.ctime, st.st_ctime);
+ write_val32(&f.inode.offset, 0);
+ write_val32(&f.inode.dsize, 0);
+ write_val32(&f.inode.rsize,0);
+ f.inode.nsize = 0;
+ /*f.inode.nlink = st.st_nlink;*/
+ f.inode.nlink = 1;
+ f.inode.spare = 0;
+ f.inode.rename = 0;
+ f.inode.deleted = 0;
+ f.inode.accurate = 0;
+ write_val32(&f.inode.dchksum, 0);
+ write_val16(&f.inode.nchksum, 0);
+ write_val16(&f.inode.chksum, 0);
+ f.name = 0;
+ f.data = 0;
+ write_val16(&f.inode.chksum, jffs_checksum(&f.inode, sizeof(struct jffs_raw_inode)));
+ f.inode.accurate = 0xff;
+ write_file(&f, fs, st);
+ if (verbose >= 1)
+ {
+ jffs_print_trace(root_dir_path, depth);
+ }
+ if (verbose >= 2)
+ {
+ jffs_print_raw_inode(&f.inode);
+ }
+ return first_ino;
+}
+
+
+/* This function writes a chunks of data. A data chunk consists of a
+ raw inode, perhaps a name and perhaps some data. */
+void
+write_file(struct jffs_file *f, FILE *fs, struct stat st)
+{
+ int npad = JFFS_GET_PAD_BYTES(f->inode.nsize);
+ int dpad = JFFS_GET_PAD_BYTES(read_val32(&f->inode.dsize));
+ int size = sizeof(struct jffs_raw_inode) + f->inode.nsize + npad
+ + read_val32(&f->inode.dsize) + dpad;
+ unsigned char ff_data[] = { 0xff, 0xff, 0xff, 0xff };
+
+ if (verbose >= 2)
+ {
+ fprintf(stderr, "***write_file()\n");
+ }
+
+ /* Write the raw inode. */
+ fwrite((void *)&f->inode, sizeof(struct jffs_raw_inode), 1, fs);
+
+ /* Write the name. */
+ if (f->inode.nsize)
+ {
+ fwrite(f->name, 1, f->inode.nsize, fs);
+ if (npad)
+ {
+ fwrite(ff_data, 1, npad, fs);
+ }
+ }
+
+ /* Write the data. */
+ if (read_val32(&f->inode.dsize))
+ {
+ if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode))
+ {
+ __u16 tmp;
+
+ switch(endian) {
+ case ENDIAN_HOST:
+ tmp = st.st_rdev;
+ break;
+ case ENDIAN_LITTLE:
+ tmp = cpu_to_le16(st.st_rdev);
+ break;
+ case ENDIAN_BIG:
+ tmp = cpu_to_be16(st.st_rdev);
+ break;
+ }
+ fwrite((char *)&tmp, sizeof(st.st_rdev) / 4, 1, fs);
+ }
+ else
+ {
+ fwrite(f->data, 1, read_val32(&f->inode.dsize), fs);
+ }
+ if (dpad)
+ {
+ fwrite(ff_data, 1, dpad, fs);
+ }
+ }
+
+ fs_pos += size;
+ /* If the space left on the block is smaller than the size of an
+ inode, then skip it. */
+}
+
+
+void
+read_data(struct jffs_file *f, const char *path, int offset)
+{
+ FILE *file;
+ char *tot_path;
+ int pos = 0;
+ int r;
+
+ if (verbose >= 2)
+ {
+ fprintf(stderr, "***read_data(): f: 0x%08x, path: \"%s\", offset: %u\r\n",
+ (unsigned int)f, path, offset);
+ fprintf(stderr, " file's size: %u\n", read_val32(&f->inode.dsize));
+ }
+
+ if (!(f->data = (unsigned char *)malloc(read_val32(&f->inode.dsize))))
+ {
+ fprintf(stderr, "read_data(): malloc() failed! (*data)\n");
+ exit(1);
+ }
+
+ if (!(tot_path = (char *)alloca(strlen(path) + f->inode.nsize + 1)))
+ {
+ fprintf(stderr, "read_data(): alloca() failed! (tot_path)\n");
+ exit(1);
+ }
+ strcpy(tot_path, path);
+ strncat(tot_path, f->name, f->inode.nsize);
+
+ if (!(file = fopen(tot_path, "r")))
+ {
+ fprintf(stderr, "read_data(): Couldn't open \"%s\".\n", tot_path);
+ exit(1);
+ }
+
+ if (fseek(file, offset, SEEK_SET) < 0)
+ {
+ fprintf(stderr, "read_data(): fseek failure: path = %s, offset = %u.\n",
+ path, offset);
+ exit(1);
+ }
+
+ while (pos < read_val32(&f->inode.dsize))
+ {
+ if ((r = fread(&f->data[pos], 1, read_val32(&f->inode.dsize) - pos, file)) < 0)
+ {
+ fprintf(stderr, "read_data(): fread failure (%s).\n", path);
+ exit(1);
+ }
+ pos += r;
+ }
+
+ fclose(file);
+}
+
+
+/* This is the routine that constructs the filesystem image. */
+int
+mkfs(FILE *fs, const char *path, int ino, int parent, int depth)
+{
+ struct dirent *dir_entry;
+ DIR *dir;
+ struct stat st;
+ struct jffs_file f;
+ int name_len;
+ int pos = 0;
+ int new_ino = ino;
+ char *filename;
+ int path_len = strlen(path);
+
+ if (verbose >= 2)
+ {
+ fprintf(stderr, "***mkfs(): path: \"%s\"\r\n", path);
+ }
+
+ if (!(dir = opendir(path)))
+ {
+ perror("opendir");
+ fprintf(stderr, "mkfs(): opendir() failed! (%s)\n", path);
+ exit(1);
+ }
+
+ while ((dir_entry = readdir(dir)))
+ {
+ if (verbose >= 2)
+ {
+ fprintf(stderr, "mkfs(): name: %s\n", dir_entry->d_name);
+ }
+ name_len = strlen(dir_entry->d_name);
+
+ if (((name_len == 1)
+ && (dir_entry->d_name[0] == '.'))
+ || ((name_len == 2)
+ && (dir_entry->d_name[0] == '.')
+ && (dir_entry->d_name[1] == '.')))
+ {
+ continue;
+ }
+
+ if (!(filename = (char *)alloca(path_len + name_len + 1)))
+ {
+ fprintf(stderr, "mkfs(): Allocation failed!\n");
+ exit(0);
+ }
+ strcpy(filename, path);
+ strcat(filename, dir_entry->d_name);
+
+ if (verbose >= 2)
+ {
+ fprintf(stderr, "mkfs(): filename: %s\n", filename);
+ }
+
+ if (lstat(filename, &st) < 0)
+ {
+ perror("lstat");
+ exit(1);
+ }
+
+ if (verbose >= 2)
+ {
+ fprintf(stderr, "mkfs(): filename: \"%s\", ino: %d, parent: %d\n",
+ filename, new_ino, parent);
+ }
+
+ write_val32(&f.inode.magic, JFFS_MAGIC);
+ write_val32(&f.inode.ino, new_ino);
+ write_val32(&f.inode.pino, parent);
+ write_val32(&f.inode.version, 1);
+ write_val32(&f.inode.mode, st.st_mode);
+ write_val16(&f.inode.uid, st.st_uid);
+ write_val16(&f.inode.gid, st.st_gid);
+ write_val32(&f.inode.atime, st.st_atime);
+ write_val32(&f.inode.mtime, st.st_mtime);
+ write_val32(&f.inode.ctime, st.st_ctime);
+ write_val32(&f.inode.dsize, 0);
+ write_val32(&f.inode.rsize, 0);
+ f.inode.nsize = name_len;
+ /*f.inode.nlink = st.st_nlink;*/
+ f.inode.nlink = 1;
+ f.inode.spare = 0;
+ f.inode.rename = 0;
+ f.inode.deleted = 0;
+ f.inode.accurate = 0;
+ write_val32(&f.inode.dchksum, 0);
+ write_val16(&f.inode.nchksum, 0);
+ write_val16(&f.inode.chksum, 0);
+ if (dir_entry->d_name)
+ {
+ f.name = strdup(dir_entry->d_name);
+ }
+ else
+ {
+ f.name = 0;
+ }
+
+ repeat:
+ write_val32(&f.inode.offset, pos);
+ f.data = 0;
+ f.inode.accurate = 0;
+ if (S_ISREG(st.st_mode) && st.st_size)
+ {
+ if (st.st_size - pos < MAX_CHUNK_SIZE)
+ {
+ write_val32(&f.inode.dsize, st.st_size - pos);
+ }
+ else
+ {
+ write_val32(&f.inode.dsize, MAX_CHUNK_SIZE);
+ }
+
+ read_data(&f, path, pos);
+ pos += read_val32(&f.inode.dsize);
+ }
+ else if (S_ISLNK(st.st_mode))
+ {
+ int linklen;
+ char *linkdata = malloc(1000);
+ if (!linkdata)
+ {
+ fprintf(stderr, "mkfs(): malloc() failed! (linkdata)\n");
+ exit(1);
+ }
+ if ((linklen = readlink(filename, linkdata, 1000)) < 0)
+ {
+ free(linkdata);
+ fprintf(stderr, "mkfs(): readlink() failed! f.name = \"%s\"\n",
+ f.name);
+ exit(1);
+ }
+
+ write_val32(&f.inode.dsize, linklen);
+ f.data = (unsigned char *)linkdata;
+ f.data[linklen] = '\0';
+ }
+ else if (S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode))
+ {
+ write_val32(&f.inode.dsize, sizeof(st.st_rdev) / 4);
+ }
+
+ write_val16(&f.inode.chksum, 0);
+ if (!S_ISBLK(st.st_mode) && !S_ISCHR(st.st_mode))
+ {
+ write_val32(&f.inode.dchksum, jffs_checksum((void *)f.data, read_val32(&f.inode.dsize)));
+ }
+ else
+ {
+ write_val32(&f.inode.dchksum, jffs_checksum((void *)&st.st_rdev, sizeof(st.st_rdev) / 4));
+ }
+
+ write_val16(&f.inode.nchksum, jffs_checksum((void *)f.name, f.inode.nsize));
+ write_val16(&f.inode.chksum, jffs_checksum((void *)&f.inode, sizeof(struct jffs_raw_inode)));
+ f.inode.accurate = 0xff;
+
+ write_file(&f, fs, st);
+ if (S_ISREG(st.st_mode) && st.st_size)
+ {
+ if (pos < st.st_size)
+ {
+ write_val32(&f.inode.version, read_val32(&f.inode.version) + 1);
+ goto repeat;
+ }
+ }
+
+ new_ino++;
+ pos = 0;
+ if (verbose >= 1)
+ {
+ jffs_print_trace(f.name, depth);
+ }
+ if (verbose >= 2)
+ {
+ jffs_print_raw_inode(&f.inode);
+ }
+
+ if (S_ISDIR(st.st_mode))
+ {
+ char *new_path;
+
+ if (!(new_path = (char *)alloca(strlen(path) + name_len + 1 + 1)))
+ {
+ fprintf(stderr, "mkfs(): alloca() failed! (new_path)\n");
+ exit(1);
+ }
+ strcpy(new_path, path);
+ strncat(new_path, f.name, f.inode.nsize);
+ strcat(new_path, "/");
+
+ if (verbose >= 2)
+ {
+ fprintf(stderr, "mkfs(): new_path: \"%s\"\n", new_path);
+ }
+ new_ino = mkfs(fs, new_path, new_ino, new_ino - 1, depth + 1);
+ }
+ if (f.name)
+ {
+ free(f.name);
+ }
+ if (f.data)
+ {
+ free(f.data);
+ }
+ }
+
+ closedir(dir);
+ return new_ino;
+}
+
+
+void
+usage(void)
+{
+ fprintf(stderr, "Usage: mkfs.jffs -d root_directory [-a little|big] [-e erase_size] [-o output_file] [-v[0-9]]\n");
+ fprintf(stderr, " By default, the file system is built using the same endianness as the\n");
+ fprintf(stderr, " host. If building for a different target, use the -a option.\n");
+}
+
+
+int
+main(int argc, char **argv)
+{
+ FILE *fs;
+ int root_ino;
+ int len;
+ int ch;
+ extern int optind;
+ extern char *optarg;
+
+ fs = stdout; /* Send constructed file system to stdout by default */
+
+ while ((ch = getopt(argc, argv, "a:d:e:v::o:h?")) != -1) {
+ switch((char)ch) {
+ case 'd':
+ len = strlen(optarg);
+ root_directory_name = (char *)malloc(len + 2);
+ memcpy(root_directory_name, optarg, len);
+ if (root_directory_name[len - 1] != '/')
+ {
+ root_directory_name[len++] = '/';
+ }
+ root_directory_name[len] = '\0';
+ break;
+ case 'v':
+ if (!optarg || strlen(optarg) == 0) {
+ verbose = 1;
+ }
+ else if (strlen(optarg) > 1 || !isdigit(optarg[0])) {
+ fprintf(stderr, "verbose level must be between 0 and 9!\n");
+ usage();
+ exit(1);
+ }
+ else {
+ verbose = strtol(optarg, NULL, 0);
+ }
+ break;
+ case 'o':
+ fs = fopen(optarg, "w");
+ if (!fs) {
+ fprintf(stderr, "unable to open file %s for output.\n", optarg);
+ exit(1);
+ }
+ break;
+ case 'a':
+ if (strcmp(optarg, "little") == 0) {
+ endian = ENDIAN_LITTLE;
+ }
+ else if (strcmp(optarg, "big") == 0) {
+ endian = ENDIAN_BIG;
+ }
+ else {
+ usage();
+ exit(1);
+ }
+ break;
+ case 'e':
+ MAX_CHUNK_SIZE = strtol(optarg, NULL, 0) / 2;
+ break;
+ case 'h':
+ case '?':
+ default:
+ usage();
+ exit(0);
+ }
+ }
+
+ if ((argc -= optind)) {
+ usage();
+ exit(1);
+ }
+
+ if (root_directory_name == NULL) {
+ fprintf(stderr, "Error: must specify a root directory\n");
+ usage();
+ exit(1);
+ }
+
+ if (verbose >= 1)
+ {
+ fprintf(stderr, "Constructing JFFS filesystem...\n");
+ }
+ root_ino = make_root_dir(fs, JFFS_MIN_INO, root_directory_name, 0);
+ mkfs(fs, root_directory_name, root_ino + 1, root_ino, 1);
+
+ fclose(fs);
+ free(root_directory_name);
+ exit(0);
+}