🫏 How To Open Squashfs File

Need tips on emulation of MIPS-BE system using QEMU with the help of squashfs image file and uBoot Kernel image file extracted from the firmware file. Long Version: What I have: A cheap unpopular GPON (Fiber ONU) device, which I have root shell access to. A decent computer Beginner skills (binwalk, gdb, basic buffer overflow etc.) Afterwards, open the folder bin inside the Image Builder folder, then open the target folder, then the folder you find in it (it has a device-type-specific name), and then inside a folder called generic and you should reach the flashable images. Choose the right image (factory or sysupgrade) and install it. The file system in embedded devices are usually compressed to save up space. Some of the most common compressions used by IoT device file systems are LZMA, GZIP, Zlib, Zip and ARJ to name a few. Let’s put some of this knowledge to practical use. We know that some vendors for LZMA compressed Squashfs file system use the magic number shsq. The following options are specific to unpacking files from a SquashFS image to disk: --no-sparse Do not create sparse files. Always unpack sparse files by writing blocks of zeros to disk. --set-xattr Set the extended attributes from the SquashFS image. --set-times Set the create and modify timestamps of the file to the mtime from the SquashFS Some distributions ship images in squashfs format, especially for bootable ISOs. Describe the solution you'd like It would be great to have a native way to import this clean image into WSL using the --import command, without having to extract the squashfs to a directory, and then tar it. Describe alternatives you've considered Step1) Analyzing the firmware using binwalk shows starting address of squashfs filesystem. Thus I generated squashfs filesystem using "dd" linux utility. Step2) The analysis of generated filesystem using "binwalk ./fs.img" command shows: Squashfs filesystem, big endian, lzma signatrue, version 3.0, size: XXXXXXX bytes, XXX inodes, blocksize Obviously, I don't want to actually modify a squashfs. What I would like to do though is take an existing squashfs, a set of files and create a new squashfs which is identical to the old one except that the files in the set either replace similar files in the squasfs or are just added if there is no similar files. OK, that last part sounded weird. For anyone coming here looking for squashfs with lzma support, it seems that in Ubuntu 22.10: The kernel (5.19.0) does not support mounting LZMA-compressed squashfs images: Filesystem uses "lzma" compression. This is not supported. The unsquashfs tool from the squashfs-tools (version 1:4.5.1-1) does support LZMA without any special options. I stuck on a loading compiled OpenWRT files into the board. Reading threads this forum just don’t realize how to do it. How to load kernel and squashfs rootfs files into the board? What I have already done: cloned OpenWRT project (openmptcprouter), set parametres via “make menuconfig” Target System (MediaTek Ralink ARM) Subtarget (MT7622) Target Profile (Banana Pi R64) built project by In terms of compression ratio, the DwarFS file system is more than 10 times smaller than the SquashFS file system. With DwarFS, the content has been compressed down to less than 0.9% (!) of its original size. This compression ratio only considers the data stored in the individual files, not the actual disk space used. The flash.layout article documents how OpenWrt uses both SquashFS and JFFS2 filesystems combined into one filesystem by overlayfs. The kernel is also stored separately from these partitions in raw flash. When the kernel is built, it is also compressed with LZMA and gzip, as documented in imagebuilder . Here's the file I already tried with squashfs 3.4 but the problem is I am missing something with non-standard signature. Stack Exchange Network Stack Exchange network consists of 183 Q&A communities including Stack Overflow , the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. ERROR : Failed to mount squashfs image in (read only): No such file or directory ABORT : Retval = 255 I have also tried using "mount" to mount the .simg, but that gets me: mount -o loop,offset=31 myimage.simg /mnt. mount: /mnt: unknown filesystem type 'squashfs'. I feel like I'm missing something obvious. How do I add squashfs to dockerized things? Where can I find the SquashFS file extension? SQUASHFS files are sometimes found within Linux installation packages. NOTE: Squashfs files more commonly use the .SFS extension. Open over 400 file formats with File Viewer Plus. Free Download The FileInfo.com team has independently researched the Squashfs File System file format and Windows and HpnH.

how to open squashfs file