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83 lines
2.1 KiB
Bash
83 lines
2.1 KiB
Bash
#!/bin/sh
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# Copyright (C) 2011 O.S. Systems Software LTDA.
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# Licensed on MIT
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# Adds support to dynamic debugging of initramfs using bootparam in
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# following format:
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# shell : starts a shell before and after each module
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# shell=before:<module> : starts a shell before <module> is loaded and run
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# shell=after:<module> : starts a shell after <module> is loaded and run
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#
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# shell-debug : run set -x as soon as possible
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# shell-debug=before:<module> : run set -x before <module> is loaded and run
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# shell-debug=after:<module> : run set -x after <module> is loaded and run
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DEBUG_SHELL="false"
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debug_hook_handler() {
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status=$1
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module=$2
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if [ -n "$bootparam_shell" ] && [ "$bootparam_shell" != "true" ]; then
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shell_wanted_status=`expr $bootparam_shell : '\(.*\):.*'`
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shell_wanted_module=`expr $bootparam_shell : '.*:\(.*\)'`
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if [ "$shell_wanted_status" = "before" ]; then
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shell_wanted_status=pre
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else
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shell_wanted_status=post
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fi
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fi
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if [ "$bootparam_shell" = "true" ] ||
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( [ "$status" = "$shell_wanted_status" ] &&
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[ "$module" = "$shell_wanted_module" ] ); then
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if [ "$status" = "pre" ]; then
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status_msg="before"
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else
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status_msg="after"
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fi
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msg "Starting shell $status_msg $module..."
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sh
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fi
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if [ -n "$bootparam_shell_debug" ] && [ "$bootparam_shell_debug" != "true" ]; then
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shell_debug_wanted_status=`expr $bootparam_shell_debug : '\(.*\):.*'`
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shell_debug_wanted_module=`expr $bootparam_shell_debug : '.*:\(.*\)'`
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if [ "$shell_debug_wanted_status" = "before" ]; then
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shell_debug_wanted_status=pre
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else
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shell_debug_wanted_status=post
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fi
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fi
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if [ "$bootparam_shell_debug" = "true" ] ||
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( [ "$status" = "$shell_debug_wanted_status" ] &&
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[ "$module" = "$shell_debug_wanted_module" ] ); then
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if [ "$DEBUG_SHELL" = "true" ]; then
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return 0
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fi
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if [ "$status" = "pre" ]; then
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status_msg="before"
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else
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status_msg="after"
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fi
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msg "Starting shell debugging $status_msg $module..."
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DEBUG_SHELL="true"
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set -x
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fi
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}
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debug_enabled() {
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return 0
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}
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debug_run() {
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add_module_pre_hook "debug_hook_handler"
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add_module_post_hook "debug_hook_handler"
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}
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