diff options
Diffstat (limited to 'tools/padjffs2')
| -rw-r--r-- | tools/padjffs2/Makefile | 36 | ||||
| -rw-r--r-- | tools/padjffs2/src/Makefile | 15 | ||||
| -rw-r--r-- | tools/padjffs2/src/padjffs2.c | 155 |
3 files changed, 206 insertions, 0 deletions
diff --git a/tools/padjffs2/Makefile b/tools/padjffs2/Makefile new file mode 100644 index 0000000..a057ddd --- /dev/null +++ b/tools/padjffs2/Makefile @@ -0,0 +1,36 @@ +# +# Copyright (C) 2011 OpenWrt.org +# +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. +# + +include $(TOPDIR)/rules.mk + +PKG_NAME:=padjffs2 +PKG_VERSION:=1 + +include $(INCLUDE_DIR)/host-build.mk + +define Host/Prepare + mkdir -p $(HOST_BUILD_DIR) + $(CP) ./src/* $(HOST_BUILD_DIR)/ + find $(HOST_BUILD_DIR) -name .svn | $(XARGS) rm -rf +endef + +define Host/Configure +endef + +define Host/Compile + $(MAKE) CC="$(HOSTCC)" -C $(HOST_BUILD_DIR) +endef + +define Host/Install + $(CP) $(HOST_BUILD_DIR)/padjffs2 $(STAGING_DIR_HOST)/bin/ +endef + +define Host/Clean + rm -f $(STAGING_DIR_HOST)/bin/padjffs2 +endef + +$(eval $(call HostBuild)) diff --git a/tools/padjffs2/src/Makefile b/tools/padjffs2/src/Makefile new file mode 100644 index 0000000..fe1a7aa --- /dev/null +++ b/tools/padjffs2/src/Makefile @@ -0,0 +1,15 @@ +CC = gcc +CFLAGS = +WFLAGS = -Wall -Werror +padjffs2-objs = padjffs2.o + +all: padjffs2 + +%.o: %.c + $(CC) $(CFLAGS) $(WFLAGS) -c -o $@ $< + +padjffs2: $(padjffs2-objs) + $(CC) -o $@ $(padjffs2-objs) + +clean: + rm -f padjffs2 *.o diff --git a/tools/padjffs2/src/padjffs2.c b/tools/padjffs2/src/padjffs2.c new file mode 100644 index 0000000..679992d --- /dev/null +++ b/tools/padjffs2/src/padjffs2.c @@ -0,0 +1,155 @@ +/* + * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <errno.h> +#include <fcntl.h> +#include <libgen.h> +#include <stdio.h> +#include <stdint.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/stat.h> + +static char *progname; +static unsigned char eof_mark[4] = {0xde, 0xad, 0xc0, 0xde}; + +#define ERR(fmt, ...) do { \ + fflush(0); \ + fprintf(stderr, "[%s] *** error: " fmt "\n", \ + progname, ## __VA_ARGS__ ); \ +} while (0) + +#define ERRS(fmt, ...) do { \ + int save = errno; \ + fflush(0); \ + fprintf(stderr, "[%s] *** error: " fmt ", %s\n", \ + progname, ## __VA_ARGS__, strerror(save)); \ +} while (0) + +#define BUF_SIZE (64 * 1024) +#define ALIGN(_x,_y) (((_x) + ((_y) - 1)) & ~((_y) - 1)) + +static int pad_image(char *name, uint32_t pad_mask) +{ + char *buf; + int fd; + ssize_t in_len; + ssize_t out_len; + int ret = -1; + + buf = malloc(BUF_SIZE); + if (!buf) { + ERR("No memory for buffer"); + goto out; + } + + fd = open(name, O_RDWR); + if (fd < 0) { + ERRS("Unable to open %s", name); + goto free_buf; + } + + in_len = lseek(fd, 0, SEEK_END); + if (in_len < 0) + goto close; + + memset(buf, '\xff', BUF_SIZE); + + out_len = in_len; + while (pad_mask) { + uint32_t mask; + ssize_t t; + int i; + + for (i = 10; i < 32; i++) { + mask = 1UL << i; + if (pad_mask & mask) + break; + } + + in_len = ALIGN(in_len, mask); + + for (i = 10; i < 32; i++) { + mask = 1UL << i; + if ((in_len & (mask - 1)) == 0) + pad_mask &= ~mask; + } + + printf("padding image to %08x\n", in_len); + + while (out_len < in_len) { + ssize_t len; + + len = in_len - out_len; + if (len > BUF_SIZE) + len = BUF_SIZE; + + t = write(fd, buf, len); + if (t != len) { + ERRS("Unable to write to %s", name); + goto close; + } + + out_len += len; + } + + /* write out the JFFS end-of-filesystem marker */ + t = write(fd, eof_mark, 4); + if (t != 4) { + ERRS("Unable to write to %s", name); + goto close; + } + out_len += 4; + } + + ret = 0; + +close: + close(fd); +free_buf: + free(buf); +out: + return ret; +} + +int main(int argc, char* argv[]) +{ + uint32_t pad_mask; + int ret = EXIT_FAILURE; + int err; + int i; + + progname = basename(argv[0]); + + if (argc < 2) { + fprintf(stderr, + "Usage: %s file [pad0] [pad1] [padN]\n", + progname); + goto out; + } + + pad_mask = 0; + for (i = 2; i < argc; i++) + pad_mask |= strtoul(argv[i], NULL, 0) * 1024; + + if (pad_mask == 0) + pad_mask = (4 * 1024) | (8 * 1024) | (64 * 1024) | + (128 * 1024); + + err = pad_image(argv[1], pad_mask); + if (err) + goto out; + + ret = EXIT_SUCCESS; + +out: + return ret; +} |