This Project seems to be very similar to https://github.com/its-pointless/fixedshell/. Both are probably based of rkeene's initial programm. But fixedshell is a little more advanced by now. At least it doesn't suffer from #2. Maybe the code of libandroid-fixshebang.c could replace the one from termux-exec.c?

I do like that termux-exec is always active, as opposed to fixedshell's activation script.

Not sure if there's a fix here but thought this was worth noting. In trying to get gcloud and kubectl working in termux, I found that gcloud works fine but not when called by kubectl:

$ which gcloud
/data/data/com.termux/files/usr/google-cloud-sdk/bin/gcloud
$ head -n1 /data/data/com.termux/files/usr/google-cloud-sdk/bin/gcloud
#!/bin/sh
$ gcloud config config-helper --format=json
{
  "configuration": {
    "active_configuration": "default",
...
$ kubectl get pod
Unable to connect to the server: error executing access token command "/data/data/com.termux/files/usr/google-cloud
-sdk/bin/gcloud config config-helper --format=json": err=fork/exec /data/data/com.termux/files/usr/google-cloud-sdk
/bin/gcloud: no such file or directory output= stderr=

If the hashbang in the gcloud script is changed to /data/data/com.termux/files/usr/bin/sh then the kubectl command works.

Note that this is the binary for kubectl at https://storage.googleapis.com/kubernetes-release/release/v1.10.5/bin/linux/amd64/kubectl (amd64 since I'm on a Chromebook). I haven't tried compiling it locally yet.

exec("/data/data/com.termux/files/usr/bin/login") :permission denied

I've just installed the latest termux from the play store and it is working fine on my Android 6 smartphone

Btw the preinstalled termux-exec package does not seem to work:
the LD_PRELOAD envvar is not set at login and if i set it manually i get segfauls when i try to run a shellscript...

Not yet in apt repo

After installing termux-exec, I get an error while running other programs (in this case aapt):

CANNOT LINK EXECUTABLE: "/data/data/com.termux/files/usr/lib/libtermux-exec.so" is 64-bit instead of 32-bit
page record for 0xf77a604c was not found (block_size=64)

Here's some system information if needed:

# os.arch
aarch64

$ getprop | grep cpu
[ro.product.cpu.abi]: [arm64-v8a]
[ro.product.cpu.abilist]: [arm64-v8a,armeabi-v7a,armeabi]
[ro.product.cpu.abilist32]: [armeabi-v7a,armeabi]
[ro.product.cpu.abilist64]: [arm64-v8a]

$ uname -a
Linux localhost 3.18.20-perf+ #1 SMP PREEMPT Fri Nov 18 20:06:08 CST 2016 aarch64 Android

There are a few languages that use only C/C++-style comments but doesn't fully support using shebangs such as Go.

Instead they use the first commented line as the interpreter directive.

Example

Go

//usr/bin/env go run "$0" "$@";exit $?

I'm using JBang which allows scripting in Java using the same syntax.

//usr/bin/env jbang "$0" "$@";exit $?

I tried editing the file but that didn't work.

Proot usage is broken by the termux-exec injection mechanism.
This is reproducible by simply trying to use proot, as it complains that it cannot find "/bin/sh".
Also launching proot to some other shell not in /bin seems to work (still all /bin commands won't work).
There should be an environment variable or some other way to disable termux-exec when not needed.

Hi!
I'm installing rclone on my Nvidia Shield TV with this Magisk Module:
https://github.com/Magisk-Modules-Repo/com.piyushgarg.rclone

Finally I could execute it (despite it's a 32bits arch) and I thought that I won when I saw the GDrive directories doing an "ls" command

But later, in Kodi I discovered that it has no visibility of anyone:

I tried a "chmod", and I was thinking with a "chown", because it seems like a permissions issue (as root is the owner of this folders as image shows:)

(by the way, interesting these "total 0" isn't it?)

But if I want to know the user that executes kodi, with an "ps aux | grep kodi" nothing is showed (and it seems here is not showing all the process of the Android System).

I'm a little lost at this point, so I was wondering If I could get some recomendation from your expertise.
Thanks a lot for advance and have a nice day!

Hey,
I installed node-red on my phone. I can run it with the command node-red. Now I want to start it by a widget or after booting. I created a file which says node-red in the .shortcuts directory but after I tabed on the widget this error message popped up
exec("/data/data/com.termux/files/home/.shortcuts/node-red"): Permission denied [Process completed (code 1) - press Enter]
The programming mosquitto worked with this method, whiteout problems.
Where is the problem and how can I solve it? Or is there another way to run node red after booting?
Sorry for my bad English, I am a student from Germany...

I have the package installed (version 1:0.8) but when I try to call Ruby's bundle command I'm getting:

zsh: /data/data/com.termux/files/home/.rbenv/shims/bundle: bad interpreter: /usr/bin/env: no such file or directory

So I guess something is weird in my config.

Is there something like termux-exec doctor equivalent? 😉
Are there any environment variables that I should check?

PS: Thank you for your work!

$ pkg install termux-exec
Reading package lists... Done Building dependency tree
Reading state information... Done termux-exec is already the newest version (0.4-1). 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
$ termux-exec
No command termux-exec found, did you mean: Command termux-open in package termux-tools
$ termux-info
Packages CPU architecture:
arm Subscribed repositories:

sources.list

deb https://termux.org/packages/ stable main

science-repo (sources.list.d/science.list)

deb https://dl.bintray.com/grimler/science-packages-24 science stable

sources.list.d/pointless.list deb https://its-pointless.github.io/files/24 termux extras

game-repo (sources.list.d/game.list)

deb https://dl.bintray.com/grimler/game-packages-24 games stable
Updatable packages:
All packages up to date
Android version:
9
Kernel build information:
Linux localhost 4.4.111-16046393 #1 SMP PREEMPT Wed Oct 9 14:44:51 KST 2019 armv8l Android
Device manufacturer:
samsung
Device model:
SM-A105FN

$ su -c input keyevent 26
CANNOT LINK EXECUTABLE "/system/bin/dex2oat": "/data/data/com.termux/files/usr/lib/libtermux-exec.so" is 64-bit instead of 32-bit

Maybe LD_PRELOAD needs to be cleared by su?

Altough I am not sure clearing that variable is the best solution, as it is also used by various other programs. Most notably torsocks, tsocks and proxychains. Maybe we need to remove termux-exec from the variable while leaving other paths behind.

Termux-exec ignores missing permissions of a file. It allows files that don't have executive permissions to be executed anyway. This only happens when the file has a shebang that requires termux-exec. Normal termux-shebangs still give the correct 'permission denied'.

$ cat test.sh
#!/bin/sh
echo Hello World
$ ./test.sh
Hello World
$ chmod -x test.sh
$ ./test.sh
Hello World
$ ls -l test.sh
-rw------- 1 u0_a401 u0_a401 27 Sep 28 10:48 test.sh
$ termux-fix-shebang test.sh
$ ./test.sh
zsh: permission denied: ./test.s