Linux – Shell script compiler

Shell script compiler
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Shell Script Compiler

A generic shell script compiler. Shc takes a script, which is specified on the command line and produces C source code. The generated source code is then compiled and linked to produce a stripped binary executable.

The compiled binary will still be dependent on the shell specified in the first line of the shell code (i.e shebang) (i.e. #!/bin/sh), thus shc does not create com‐ pletely independent binaries.

shc itself is not a compiler such as cc, it rather encodes and encrypts a shell script and generates C source code with the added expiration capability. It then uses the system compiler to compile a stripped binary which behaves exactly like the original script. Upon execution, the compiled binary will decrypt and execute the code with the shell -c option.

Install:

  1. ./configure
  2. make
  3. sudo make install

Note: If make fails due to automake version, run ./autogen.sh before running the above commands.

On Ubuntu:

If the above installation method seems like too much work, then just copy the compiled binary from bin/x32 or bin/x64 to /usr/bin and put the shc.1 file in /usr/share/man/man1.

Usage:

Testing:

  1. cd to test directory: cd test
  2. Try: shc -f test.bash -o test, where test.bash is the bash source.
  3. output binary file will be test. If no output file is specified by the -o option, then it will create an executable with .xextension by default.

Known bugs:

The one (and I hope the only) limitation using shc is the _SC_ARG_MAX system configuration parameter.

It limits the maximum length of the arguments to the exec function, limiting the maximum length of the runnable script of shc.

!! – CHECK YOUR RESULTS CAREFULLY BEFORE USING – !!


Manpage for shc



Download SHC @ Github.com

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