Troubles with executing binary files

[v00x]

Im trying to compile some backports with the "make" command but it says

make: bin/bash: Command not found

screenshot

[Grimler91]

/bin/bash doesn't exist in termux since it is a prefixed environment. You will need to find the line of code that generates that message and change /bin/bash to /data/data/com.termux/files/usr/bin/bash.

It could be that there is the shebang of files causing the problem, we have a script in termux that changes the shebang automatically so you can run termux-fix-shebang files-to-change and maybe fix the problem.

[Grimler91]

There's an entry about it in the termux wiki: https://wiki.termux.com/wiki/Main_Page#Prefixed_System

[v00x]

alias su='/system/xbin/su --preserve-environment -c LD_LIBRARY_PATH=/data/data/com.termux/files/usr/lib exec /data/data/com.termux/files/usr/bin/bash --login'

I used this alias from another issue suggestion but i doesn't seem to fix the problem.

Also i tried

termux-fix-shebang /data/data/com.termux/files/usr/bin/bash

and

termux-fix-shebang files-to-change

And the output was..

# make
make: /bin/bash: Command not found                      make: /bin/bash: Command not found
make: /bin/bash: Command not found
make: /bin/bash: Command not found
make: *** [Makefile:30: default] Error 127
# bash make
/data/data/com.termux/files/usr/bin/make: /data/data/com.termux/files/usr/bin/make: cannot execute binary file

[Grimler91]

@v00x You shouldn't use su here, there's no need for it in termux. The second error is due to su.

"files-to-change" should be replaced by a list of the files who's prefixes you want to change.

I'll quote myself:

bin/bash doesn't exist in termux since it is a prefixed environment. You will need to find the line of code that generates that message and change /bin/bash to /data/data/com.termux/files/usr/bin/bash.

Do grep -nr "/bin/bash" . in the project folder to find all possible places where the /bin/bash is used.

[v00x]

Okay so..

grep -nr "/bin/bash" .
./scripts/check_depmod.sh:1:#!/bin/bash
./scripts/update-initramfs.sh:1:#!/bin/bash
./scripts/compress_modules.sh:1:#!/bin/bash
./scripts/blacklist.sh:1:#!/bin/bash
./scripts/uninstall.sh:1:#!/bin/bash
./Makefile:8:SHELL := /bin/bash
# make
make: /bin/bash: Command not found
make: /bin/bash: Command not found
make: /bin/bash: Command not found
make: /bin/bash: Command not found
make: *** [Makefile:30: default] Error 127
# exit
exit
$ ls
d  py
$ cd d
bash: cd: d: Permission denied

[Neo-Oli]

@v00x Don't forget the period at the end to only search the current folder.
grep -nr "/bin/bash" .

[v00x]

Then i tried to exit su and enter the commans as $ but the permission is denied.

Maybe i shouldn't enter that alias..

[Grimler91]

@v00x first of all, open a new shell to get rid of the permission denied errors (I think, could also be that the folders were created by root).

From the grep output you see which lines you need to change.
Running this should fix the /bin/bash problem:

termux-fix-shebang ./scripts/*.sh
sed -i ./Makefile "s@SHELL := /bin/bash@SHELL := $PREFIX/bin/bash@g"

[v00x]

I made a clean install of the termux app and then edit the shell scripts in the project, so now make
is working. Thanks!