Segmentation fault while trying to recover file with extundelete
hello,
I accidentally removed a directory with its contents with rm -r and I don't have a backup. I got to know about extundelete utility on linux and downloaded on my Linux Fedora 28 notebook PC. The file system is ext4. I log in to the system as single user mode and unmount the /home directory from the partition where the file was located; in this case it is /dev/mapper/fedora-home. After I unmounted /home I ran the fsck on the partition and it was successful, but when I try to recover the directory (or a single file) I get segmentation fault like this:
extundelete gave segmentation fault no matter what file I tried to recover, whether a directory or a single file, and I am certain I entered the file path correct. I did this right after the directory or file was removed. I unmounted the /home directory immediately thus avoiding any writes to the partition. Below is my filesystem:
Thank you.
Hi,
While comparing primary key data of two tables thr bteq script I am getting this Error. This script is a shell script.
*** Error: The following error was encountered on the output file.
Script.sh: 3043492 Segmentation fault(coredump)
Please let me know how to get through it.
... (5 Replies)
Hi,
I am having this segmentation fault not in the following program, bt. in my lab program . My lab program is horrible long so cannot post it here bt. I am using the following logic in my program which is giving the segmentation fault. Bt. if I run this sample program as it is it dosen't give... (3 Replies)
This code is causing a segmentation fault and I can't figure out why. I'm new to UNIX and I need to learn how to avoid this segmentation fault thing. Thank you so much. Thanks also for the great answers to my last post.:):b:
int main()
{
mysqlpp::Connection conn(false);
if... (3 Replies)
I use a binary name (ie polo) it gets some parameter , so for debugging normally i do this :
i wrote script for watchdog my app (polo) and check every second if it's not running then start it , the problem is , if my app , remain in state of segmentation fault for a while (ie 15 ... (6 Replies)
Hi Guys,
I just installed and booted a zone called testzone. When I logged in remotely and tried changing to root user I get this error:
"Segmentation fault"
Can someone please help me resolve this?
Thanks alot (2 Replies)
I keep getting this fault on a lot of the codes I write, I'm not exactly sure why so I'd really appreciate it if someone could explain the idea to me.
For example this code
#include <stdio.h>
main()
{
unsigned long a=0;
unsigned long b=0;
int z;
{
printf("Enter two... (2 Replies)
Hi everyone
Need to get version of npm application that have several output like this:
root: nmp -version
10
root: nmp -version
10
root: nmp-new -version
3.1
root: nmp-old -version
Segmentation fault
count them , after that write to the file like this:
10 2
3.1 1 (1 Reply)
Oddities with gcc, 2.95.3 for the AMIGA and 4.2.1 for MY current OSX 10.14.1...
I am creating a basic calculator for the AMIGA ADE *NIX emulator in C as it does not have one.
Below are two very condensed snippets of which I have added the results inside the each code section.
IMPORTANT!... (11 Replies)
Discussion started by: wisecracker
11 Replies
LEARN ABOUT DEBIAN
recover
RECOVER(6) Games Manual RECOVER(6)NAME
recover - recover a NetHack game interrupted by disaster
SYNOPSIS
recover [ -d directory ] base1 base2 ...
DESCRIPTION
Occasionally, a NetHack game will be interrupted by disaster when the game or the system crashes. Prior to NetHack v3.1, these games were
lost because various information like the player's inventory was kept only in memory. Now, all pertinent information can be written out to
disk, so such games can be recovered at the point of the last level change.
The base options tell recover which files to process. Each base option specifies recovery of a separate game.
The -d option, which must be the first argument if it appears, supplies a directory which is the NetHack playground. It overrides the
value from NETHACKDIR, HACKDIR, or the directory specified by the game administrator during compilation (usually /usr/games/lib/nethack-
dir).
For recovery to be possible, nethack must have been compiled with the INSURANCE option, and the run-time option checkpoint must also have
been on. NetHack normally writes out files for levels as the player leaves them, so they will be ready for return visits. When check-
pointing, NetHack also writes out the level entered and the current game state on every level change. This naturally slows level changes
down somewhat.
The level file names are of the form base.nn, where nn is an internal bookkeeping number for the level. The file base.0 is used for game
identity, locking, and, when checkpointing, for the game state. Various OSes use different strategies for constructing the base name.
Microcomputers use the character name, possibly truncated and modified to be a legal filename on that system. Multi-user systems use the
(modified) character name prefixed by a user number to avoid conflicts, or "xlock" if the number of concurrent players is being limited.
It may be necessary to look in the playground to find the correct base name of the interrupted game. recover will transform these level
files into a save file of the same name as nethack would have used.
Since recover must be able to read and delete files from the playground and create files in the save directory, it has interesting interac-
tions with game security. Giving ordinary players access to recover through setuid or setgid is tantamount to leaving the playground
world-writable, with respect to both cheating and messing up other players. For a single-user system, this of course does not change any-
thing, so some of the microcomputer ports install recover by default.
For a multi-user system, the game administrator may want to arrange for all .0 files in the playground to be fed to recover when the host
machine boots, and handle game crashes individually. If the user population is sufficiently trustworthy, recover can be installed with the
same permissions the nethack executable has. In either case, recover is easily compiled from the distribution utility directory.
NOTES
Like nethack itself, recover will overwrite existing savefiles of the same name. Savefiles created by recover are uncompressed; they may
be compressed afterwards if desired, but even a compression-using nethack will find them in the uncompressed form.
SEE ALSO nethack(6)BUGS
recover makes no attempt to find out if a base name specifies a game in progress. If multiple machines share a playground, this would be
impossible to determine.
recover should be taught to use the nethack playground locking mechanism to avoid conflicts.
4th Berkeley Distribution 9 January 1993 RECOVER(6)