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POL_Test_ptrace

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petch

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This installer has been approved by the team.

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Platforms:
Downloads: 8949
Wine: System

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Description

Check whether wineserver process is able to use ptrace().
It may use ptrace():
- if the Linux kernel doesn't include the Yama patch that restricts its use
- if the Yama patch is present but the ptrace() scope is fully opened (/proc/sys/kernel/yama/ptrace_scope is 0)
- if the wineserver process has cap_sys_ptrace capability (setcap cap_sys_ptrace=ep wineserver)

Remarks:
- this script may need to restart wineserver, be sure to call it when no program is supposed to run
- it currently doesn't do anything under Mac OS X

Source code

#!/bin/bash
 
#  Check Kernel ptrace
 
#  Without Yama patch, we assume ptrace is allowed from anywhere
if [ -e /proc/sys/kernel/yama/ptrace_scope ]; then
        NEED_WINESERVER_RESTART=''
        while true;
            do [ "$(cat /proc/sys/kernel/yama/ptrace_scope)" = 0 ] && break
                if setcap -q -v cap_sys_ptrace=ep "$(which wineserver)"; then
                        [ -n "$NEED_WINESERVER_RESTART" ] && wineserver -k
                        break
                fi
                NEED_WINESERVER_RESTART=1
                POL_SetupWindow_Init
                POL_SetupWindow_menu_num "$(eval_gettext 'The program needs access to ptrace() to proceed:')" "$TITLE" "$(eval_gettext 'Give the capability to wineserver executable')~$(eval_gettext 'Enable ptrace() globally')~$(eval_gettext 'I fixed it myself, just retest')~$(eval_gettext 'Abort installation')" "~"
                case "$APP_ANSWER" in
                    0)
                        POL_Call POL_Function_RootCommand 'sudo setcap cap_sys_ptrace=ep "'"$(which wineserver)"'"'
                        ;;
                    1)
                        POL_Call POL_Function_RootCommand 'echo 0|sudo tee "/proc/sys/kernel/yama/ptrace_scope"'
                        ;;
                    2)
                        ;;
                    *)
                        NOBUGREPORT="TRUE"
                        POL_Debug_Fatal "$(eval_gettext 'User abort')"
                        ;;
                esac
        done
fi
 
POL_SetupWindow_Close
exit 0

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