ext2 is a Linux filesystem.
ext2 is a filesystem mostly used under linux.
Other versions are ext, ext3 and ext4.
Questions tagged [ext2]
106 questions
0
votes
1 answer
Linux C ext2fs_write_inode_full failing to write
after successfully reading the file inode with this:
retval = ext2fs_read_inode_full(current_fs, inode, inode_buf, EXT2_INODE_SIZE(current_fs->super));
if (retval) {
fprintf(stderr, "Failed to read inode\n");
free(fs);
free(inode_buf);
…
WallyZ
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1 answer
Space needed for reserved blocks on a partition
By default, the ext2/3/4 fs reserves 5% of its capacity to be able to keep running when diskspace is getting low.
I also believe it has something to do with allowing "fragmentation between files" or something like this (I haven't been able to find…
Yozamu
- 31
- 1
- 5
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1 answer
Is there a way to create an iterator style function for i_block in C?
I am working on some ext2 filesystem stuff for a school project (implement ls, mkdir, that kind of thing) and have found that I am generating a lot of redundant code for tasks where I need to traverse an inode's i_block. I have functions to count…
Ace.C
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1 answer
ext2 "image" files vs real ext2 devices
I'm tasked with writing a reader program for windows that is able read an ext2 partition.
For my testing I'm using a drive I formatted to ext2 and a file I created using mkfs (a file that does mount and work well under linux)
For some reason when I…
user407487
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1 answer
libext2fs code not working
I just tried to access my superblock information using the code as shown here:-
http://paste.pocoo.org/show/340724/
However, I get the error as shown here:-
http://paste.pocoo.org/show/340723/
My kernel version is 2.6.31-22-generic and I have not…
user277465
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votes
1 answer
how to print the s_uuid of ext2 superblock in C
I create a variable to store the value of superblock's s_uuid. But I get trouble into how to print this variable like xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx in this form. I tried to use printf in %x and %s to print my variable, but it doesn't work.
I…
xiekuan
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- 1
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What does the FS_REQUIRES_DEV flag do in Linux filesystems?
I was reading the source for ext2fs where the filesystem is registered with the FS_REQUIRES_DEV flag in fs/ext2/super.c. Both fs.h and the kernel documentation don't say anything else about this flag.
I also tried to look up how the VFS uses of this…
Shrikant Giridhar
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0 answers
How to modify/patch and rebuild e2fsprogs? Build is failing on adding a single printf
I'm trying to patch and rebuild e2fsprog. Re-build is failing as test cases started failing post patching. I have just added a printf comment so not sure why this will lead to test case failure.
Steps I'm following.
a) make packages --> get source…
Satpal Parmar
- 361
- 3
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1 answer
How removing a file in ext2 file system work
I am learning the EXT2 file system. I am confused about how the removal of a file works for EXT2. My understanding is that, upon deletion, it doesn't actually deletes the inode, instead it marks some metadata as unused. My question is that, what…
samuel
- 43
- 4
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1 answer
C, Storing a string with length <=60 in the space for an array of unsigned ints of size 15
This question has totally confused me-
I have an array(fixed size):
unsigned int i_block[15];
I have a string(length <= 60):
"path/to/bla/is/bla"
How would I go about storing the characters of the string in the space for the array?
I was thinking…
user126885
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- 10
0
votes
1 answer
Mounting ext4 mounts as ext2 in linux 4.4.0 [RHEL]
commands I executed
mkfs .ext4 -F /dev/xxx0
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
524288 inodes, 2097152 blocks
104857 blocks (5.00%)…
Himanshu Sourav
- 700
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0
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1 answer
access to superblock in vdi, ext2
I am trying to access the superblock in the opening and reading in of a ext2 filesystem from a vdi file. I want to use the struct ext2_super_block that exists in the ext2.h file (see line 415 of http://lxr.free-electrons.com/source/fs/ext2/ext2.h).…
minusila
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How to open a file on an ext2 file system?
How can I open a file in an ext2 file system. For example, lets say I want to open the file: /a/b/c.txt
I'm looking at the functions here: http://www.nongnu.org/ext2-doc/ext2.html
User
- 23,729
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c - How to find the inode of a directory in an ext2 virtual image (.img) given an absolute path?
In c, how would I find a directory in a virtual disk? I can easily recurse the absolute path and tun that into just the name of the directory I am looking for (i.e. turning /x/y/z into just z). I know that the root is inode 2, and I know how to get…
Jeffrey
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Ext2 utility "e2cp" alternative for OS X
In my linux machines, I use the command line utility e2cp to copy files from and to ext2 disk images. Unfortunately, OS X does not provide any ext2fs utility out of the box.
Is there a version of e2cp that is compatible to OS X, or a similar…
fsestini
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