Unable to load libsctp.so for non root user - c++

I have a Linux application that uses the libsctp.so library. When I run it as root, it runs fine.
But when I run it as an ordinary user, it gives the following error:
error while loading shared libraries: libsctp.so.1: cannot open shared object file: No such file or directory
But, when I do ldd as ordinary user, it is able to see the library:
[sanjeev#devtest6 src]$ ldd myapp
...
...
libsctp.so.1 => /usr/local/lib/libsctp.so.1 (0x00d17000)
[sanjeev#devtest6 src]$ ls -lL /usr/local/lib/libsctp.so.1
-rwxrwxrwx 1 root root 27430 2009-06-29 11:26 /usr/local/lib/libsctp.so.1
[sanjeev#devtest6 src]$
What could be wrong? How is the ldd is able to find libsctp.so, but when actually running the app, it is not able to find the same library?
EDIT: Just observed that this problem appears only if setuid bit is set for myapp.

I had the same exception on Ubuntu 18.04, after executing the following code:
SctpServerChannel s = SctpServerChannel.open();
The issue was solved after running:
sudo apt-get install libsctp1

Fixed the problem. I added a new file in /etc/ld.so.conf.d with the followng name:
libsctp.so.1.conf
The contents of libsctp.so.1.conf is as follows:
/usr/local/lib/
And then ran
/sbin/ldconfig
, after which my app ran successfully.
Explanation: Since the setuid bit was set, the program is executed as root, for whom LD_LIBRARY_PATH is not available. Hence it is not able to find libsctp.so. I was not aware of this because when I login as root, .bashrc gets executed and LD_LIBRARY_PATH becomes available.

It could be because of environment setting difference.
You may need to add /usr/local/lib/ to LIBRARY_PATH or kind of.

You can recieve that error if a shared library that libsctp.so itself depends on is not found (yes, it is a little confusing). Try ldd on the library itself:
ldd /usr/local/lib/libsctp.so.1

Are you setting LD_LIBRARY_PATH before switching to root user or after that? When you run ldd as root does it still find all dependent libraries?
dmitry#debian:~$ echo $LD_LIBRARY_PATH
dmitry#debian:~$ export LD_LIBRARY_PATH=/usr/local/lib
dmitry#debian:~$ echo $LD_LIBRARY_PATH
/usr/local/lib
dmitry#debian:~$ su
Password:
debian:/home/dmitry# echo $LD_LIBRARY_PATH
debian:/home/dmitry#

Related

Environment variable error while trying to create a solver in OpenFOAM 9

I'm trying to create a solver in my /opt/OpenFOAM/OpenFOAM-9/applications/solvers/electromagnetics directory using sudo foamNewSource App newSolver. But, I keep getting the following error:
foamNewSource: Creating new interface file newSolver.C
wmakeFilesAndOptions error: environment variable $WM_OPTIONS not set
And then, although I can see a newSolver.C file, I cannot see a Make directory and neither the rest of the files.
I'm running EndeavourOS Linux x86_64 with kernel 5.15.6-arch2-1 and shell bash 5.1.12. I installed the openfoam-org package from the AUR, and in order to set it up, I have the following in my .bashrc config file:
source /opt/OpenFOAM/OpenFOAM-9/etc/bashrc
At first, when I did env | grep WM I couldn't find WM_OPTIONS in my system. So, after googling a little bit, I added this to my .bashrc file:
source /opt/OpenFOAM/OpenFOAM-9/etc/bashrc
export WM_OPTIONS=linux64GccDPOpt
And now, doing env | grep WM I get:
WM_COMPILER=Gcc
WM_PRECISION_OPTION=DP
WM_PROJECT_USER_DIR=/home/username/OpenFOAM/username-9
WM_MPLIB=SYSTEMOPENMPI
WM_OPTIONS=linux64GccDPOpt
WM_ARCH=linux64
WM_LABEL_SIZE=32
WM_PROJECT=OpenFOAM
WM_THIRD_PARTY_DIR=/opt/OpenFOAM/ThirdParty-9
WM_LABEL_OPTION=Int32
WM_CC=gcc
WM_CFLAGS=-m64 -fPIC
WM_LINK_LANGUAGE=c++
WM_OSTYPE=POSIX
WM_PROJECT_VERSION=9
WM_DIR=/opt/OpenFOAM/OpenFOAM-9/wmake
WM_ARCH_OPTION=64
WM_CXXFLAGS=-m64 -fPIC -std=c++0x
WM_PROJECT_INST_DIR=/opt/OpenFOAM
WM_LDFLAGS=-m64
WM_CXX=g++
WM_COMPILE_OPTION=Opt
WM_PROJECT_DIR=/opt/OpenFOAM/OpenFOAM-9
WM_COMPILER_TYPE=system
WM_COMPILER_LIB_ARCH=64
Now I can see the WM_OPTIONS environment variable (just above WM_ARCH=linux64 and below WM_MPLIB=SYSTEMOPENMPI), but I still get the same wmakeFilesAndOptions error.
I don't know what configuration I'm messing up, so I'd appreciate some help!
Thanks!
Using sudo in this case is not a good idea, instead run the scripts on your home directory:
mkdir -p $FOAM_RUN
cd $FOAM_RUN
foamNewSource App newSolver
For WM_OPTIONS environment variable, don't set it manually, instead use:
export WM_OPTIONS=$WM_ARCH$WM_COMPILER$WM_PRECISION_OPTION$WM_LABEL_OPTION$WM_COMPILE_OPTION

Need help on compiling DPDK hello world

I try to learn DPDK using the following link: https://doc.dpdk.org/guides/prog_guide/build_app.html
I have downloaded DPDK 19.11.1 version in Ubuntu 16 virtual machine. Then unzipped the tar.gz file. Then I have given the following commands
~/DPDK$ cd examples/helloworld/
~/DPDK/examples/helloworld$ export RTE_SDK=/home/vijay/dpdk
~/DPDK/examples/helloworld$ export RTE_TARGET=x86_64-native-linuxapp-gcc
~/DPDK/examples/helloworld$ make
The following error is displayed:
/home/vijay/dpdk/mk/internal/rte.extvars.mk:29 cannot find .config in /home/vijay/dpdk/build. stop
If I put sudo make, the following error is displayed
Makefile:44: *** "Please define RTE_SDK environment variable". stop
When I put echo $RTE_SDK and echo $RTE_TARGET the values are printed correctly. I tried x86_64-native-linux-gcc for RTE_TARGET also.
I tried multiple times and referred to different sources. Not sure whether I miss any steps in the process. What can I try next?
Based on the error logs, it looks like you have not built dpdk libraries in the desired target folder. To do it correctly
cd dpdk-main-folder
export RTE_SDK=$PWD
export RTE_TARGET=x86_64-native-linuxapp-gcc
make config T=$RTE_TARGET O=$RTE_TARGET
cd $RTE_TARGET
make -j 10
With these done go to your desired example and execute make

error while loading shared libraries in sudo

I read documentation on https://github.com/openyou/libomron/blob/master/README.asciidoc
Exec:
cd /
sudo find . | grep libomron.so.0.9.0
result:
./home/splincode/Develop/omron/c++_modules/libomron/omron-build/lib/
Okey, I add library in global path
LD_LIBRARY_PATH=/usr/local/lib
LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/splincode/Develop/omron/c++_modules/libomron/omron-build/lib/
export LD_LIBRARY_PATH
Then it's work:
cd ~/Develop/omron/usr/local/bin/
./omron_790IT_test
But, not access in hardware, result
Found 1 omron 790ITs
Cannot open omron 790IT!
as a result, I began to run as administrator, but he does not see the library, what to do?
sudo ./omron_790IT_test
Result:
./omron_790IT_test: error while loading shared libraries: libomron.so.0.9.0: cannot open shared object file: No such file or directory
./omron_790IT_test: error while loading shared libraries
This is happening because by default sudo does not propagate environment variables; doing so presents a security risk.
You can deal with this in one of three ways:
Link your program in a way that doesn't require LD_LIBRARY_PATH to be set (this is the best approach).
In your case, the link command should look something like this:
gcc -o omron_790IT_test ... \
-Wl,-rpath=/home/splincode/Develop/omron/c++_modules/libomron/omron-build/lib
Explicitly set the wanted environment variable inside the sudo process:
sudo env LD_LIBRARY_PATH=... ./omron_790IT_test
Ask sudo to propagate all environment variables into the root process:
sudo -E ./omron_790IT_test
sudo --preserve-env ./omron_790IT_test

omz_urlencode:42: -regex-match not available for regex

Okay so i'm trying to install Homebrew, so that I can I can install nodejs and npm. However I'm using this command from brew.sh;
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Once I install Homebrew It keeps returning this error
It appears Homebrew is already installed. If your intent is to reinstall you
should do the following before running this installer again:
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"
The current contents of /usr/local are bin CODEOFCONDUCT.md etc lib libexec Library LICENSE.txt README.md sbin share .git .github .gitignore
omz_urlencode:42: failed to load module `zsh/regex': dlopen(/usr/local/Cellar/zsh/5.2/lib/zsh/regex.so, 9): image not found
omz_urlencode:42: -regex-match not available for regex'
I honestly have no idea what's happening here. I'm not sure If I have to symlink Homebrew up or what. But I have tried everything I know so far (which isn't much). If anyone could be kind enough to give me instructions as what too look for to solve the issue, I'm all ears.
Thank you for listening!
It seems it's a bug that have been corrected in recent version of OMZ, you should update it.
You get the output:
zsh: command not found: homebrew
Because homebrew is not a command. Try brew -v instead.
To resolve:
Warning: node-5.10.1 already installed, it's just not linked
Use brew link node
Okay so I think I have made some progress, It may have been for some weird reason I didn't have permission writes to run the 'brew link < package > ' so i ran the following command:
'sudo chown -R /usr/local/share/systemtap/tapset && brew doctor'
Once I ran 'brew link node' it successfully created 7 symlinks for the node directory on the following path;
'Linking /usr/local/Cellar/node/5.10.1... 7 symlinks created'
However, when I installed live-server via npm; I typed 'live-server -v' and it again returned 'zsh: command not found: live-server'. In addition to this it keeps telling me I have 'unbrewed dylibs':
Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.
Unexpected dylibs:
/usr/local/lib/libociei.dylib
So im still unsure what the exact issue is.
P.S. Apologies for not posting this correctly, as im trying to see where I can seperate it into commands like you corrected in the first post, if you could link me to a post where it tells me how to use it properly i'll be more than happy to read it.
Thanks,

apktool build apk fails

I am experiencing very annoying problems with the application apktool problem.
I do not understand what i am doing wrong, or what the problem is.
I tried this on debian , and on linux mint. I used different versions of apktool,
resulting in the same error:
I: Checking whether sources has changed...
I: Checking whether resources has changed...
I: Building resources...
Exception in thread "main" brut.androlib.AndrolibException: brut.common.BrutException: could not exec command: [aapt, p, -F, /tmp/APKTOOL3630495287059303807.tmp, -I, /home/awesomename/apktool/framework/1.apk, -S, /home/awesomename/out/./res, -M, /home/awesomename/out/./AndroidManifest.xml]
at brut.androlib.res.AndrolibResources.aaptPackage(Unknown Source)
at brut.androlib.Androlib.buildResourcesFull(Unknown Source)
at brut.androlib.Androlib.buildResources(Unknown Source)
at brut.androlib.Androlib.build(Unknown Source)
at brut.androlib.Androlib.build(Unknown Source)
at brut.apktool.Main.cmdBuild(Unknown Source)
at brut.apktool.Main.main(Unknown Source)
Caused by: brut.common.BrutException: could not exec command: [aapt, p, -F, /tmp/APKTOOL3630495287059303807.tmp, -I, /home/windows/apktool/framework/1.apk, -S, /home/windows/out/./res, -M, /home/windows/out/./AndroidManifest.xml]
at brut.util.OS.exec(Unknown Source)
... 7 more
Caused by: java.io.IOException: Cannot run program "aapt": error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1041)
at java.lang.Runtime.exec(Runtime.java:617)
at java.lang.Runtime.exec(Runtime.java:485)
... 8 more
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:135)
at java.lang.ProcessImpl.start(ProcessImpl.java:130)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1022)
... 10 more
It seems it can not use aapt , but i read about apktool.
And it seems that aapt is build inside apktool , why is it not working ?
It seems there's some problem in building the resources while recompiling the apk.
what you can do is, when you decompile your apk use this command
apktool d -f -r apkfilename.apk
here -f is to replace previous decompiled apk's code and -r is to ignore the decompiling of resources.
this would prevent the resources from being decompiled and will simply copy the same resources when you recompile the apk.
In case you've been using v1 and now upgraded to v2, try manually deleting the framework file.
On windows 8 it's normally at C:\Users\YourName\apktool\framework\1.apk.
The file should be regenerated once you try to build something.
My problem was solved by deleting the \framework\1.apk, making a backup on the files I modified, ereasing the dir and decompiling the *.apk again, etc... (on linux, the path is home/[user]/apktool/...). After the update, apktool always loaded the old resource table. N
For me, I solved this problem by first clearing apktool's framework directory by typing in the terminal.
$ apktool empty-framework-dir
Afterwards I uninstalled apktool and related files by typing
$ sudo apt purge apktool
Then i went to https://bitbucket.org/iBotPeaches/apktool/downloads/ to get the latest jar file for apktool(apktool_2.5.0.jar as at the time of writing this).
On first run
$ java -jar apktool_2.5.0.jar b <MyAPP.apk> #Without ><
it works.
since I work with apktool most of the times I needed a situation where I can run apktool from anywhere so I gave the jar file execute permissions by typing
$ sudo chmod +x apktool_2.5.0.jar
Afterwards I moved it /usr/bin/ by typing
$ sudo apktool_2.5.0.jar /usr/bin/
Definitely seems like the aapt PATH problem I had awhile back. Have you added aapt to PATH? If you still have problems, I have made a good apk kit in bash to avoid all these dependency problems. It supports apktool, signapk, zipalign,adb, fastboot, and heimdall. Check it out. All you need is a current java install.
http://forum.xda-developers.com/android/development/toolkit-apk-munky-rench-t3026757/post58747626#post58747626
There isn’t really enough information to give you a definite answer.
How ever you mentioned using different versions but the aapt issue was solved in version 2.4. Dependencies have been reduced to java version 1.8 or greater and the framework.
I use Debian and have the following:
Apktool 2.4
java version 11
Android framework
That’s all it took to get rid of the aapt path error.
The last error I came across was unrelated to aapt but was on the framework so I ran this command
apktool empty-framework-dir
And it solved it.
try to put the dir which include aapt file to your PATH. for example, export PATH=$PATH:./ ./apktool b
try to install ia32-libs and update latest version of apktool. (if possible restart)
apktool requires "ia32-libs" which is not available after Ubuntu 12.04. install ia32-libs
sudo apt-get install lib32z1 lib32ncurses5 lib32bz2-1.0 lib32stdc++6
Download latest version of apktools.jar - https://bitbucket.org/iBotPeaches/apktool/downloads
apktool complete installation guide - http://ibotpeaches.github.io/Apktool/install/
I just encounter same problem when run apktool d foo.apk(decompiled success) and then apktool b foo(recompile failed with similar error).
The apktool tool above was installed via sudo apt-get install apktool on Kali Linux.
So, the solution was visits apktool's official site, e.g. https://connortumbleson.com/2017/01/23/apktool-v2-2-2-released/ (it's latest version at this time of writing), download it, md5sum it, e.g. md5sum apktool_2.2.2.jar to verify, then rename that apktool_2.2.2.jar to apktool.jar.
Then do java -jar ./apktool.jar b foo to recompile, it success without error (the generated apk located at ./foo/dist/foo.apk).
The main issue is apktool version you need 2.4.0
You must manually install it from ibotpeaches git hub
here some good info
https://www.youtube.com/watch?v=kB6s10Uwpcs
and a automated script for kali
https://github.com/catenatedgoose?tab=repositories
In my mind the problem is how you install apktool...
I had the same problem and I did this and it worked very well:
For installation you first have to remove any installed apktool by the command:
sudo apt purge apktool
Then you'll have to install apktool but in a different way.
To continue save the link bellow as apktool in a directory.
[https://raw.githubusercontent.com/iBotPeaches/Apktool/master/scripts/linux/apktool]
Then open this link below and download the latest apktool.jar file: https://bitbucket.org/iBotPeaches/apktool/downloads/
Then rename the file as apktool.jar
After that give both files the permission by the command:
Sudo chmod -x apktool.jar
And for the saved script:
Sudo chmod -x apktool
At the end copy both files in the directory:
/usr/local/bin
By the command:
Sudo cp apktool.jar /usr/local/bin
And the script file:
Sudo cp apktool /usr/local/bin
After that try running apktoolin the terminal.
The solution is to include your apktool directory into your system PATH.