Create syscalls file (#2754)

* Create syscalls file

A little script to determine the necessary syscalls for a program.

contrib/syscalls.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+STRACE_OUTPUT_FILE="$(pwd)/strace_output.txt"
+SYSCALLS_OUTPUT_FILE="$(pwd)/syscalls.txt"
+
+if [ $# -eq 0 ]
+then
+echo
+echo " *** No program specified!!! ***"
+echo 
+echo -e "Make this file executable and execute it as:\\n"
+echo -e "\\e[96m syscalls.sh /full/path/to/program\\n"
+echo -e "\\e[39mif you saved this script in a directory in your PATH (e.g., in ${HOME}/bin), otherwise as:\\n"
+echo -e "\\e[96m ./syscalls.sh /full/path/to/program\\n"
+echo -e "\\e[39mUse the full path to the respective program to avoid executing it sandboxed with Firejail\\n(if a Firejail profile for it already exits and 'sudo firecfg' was executed earlier)\\nin order to determine the necessary system calls."
+echo
+exit 0
+
+else
+
+strace -cfo "$STRACE_OUTPUT_FILE" "$@" && awk '{print $NF}' "$STRACE_OUTPUT_FILE" | sed '/syscall\|-\|total/d' | sort -u | awk -vORS=, '{ print $1 }' | sed 's/,$/\n/' > "$SYSCALLS_OUTPUT_FILE"
+echo
+echo -e "\e[39mThese are the sorted syscalls:\n\e[93m"
+cat "$SYSCALLS_OUTPUT_FILE"
+echo
+echo -e "\e[39mThe sorted syscalls were saved to:\n\n\e[96m$SYSCALLS_OUTPUT_FILE"
+echo
+exit 0
+
+fi