Debian

A bash builtin command named “enable” to enable or disable a bash builtin command

[bash light=”true”] $command $echo $? 0 $enable -n command $command bash: command: command not found $echo $? 127 $enable command $command $enable -n enable $enable bash: enable: command not found $ [/bash] RELATED SOURCE CODE EXPOSURE [c light=”true”] /* Enable/disable shell commands present in LIST. If list is not specified, then print out a list […]

Jeffrin Jose T

22 Nov 2018

Bash, Bash, Bash Builtin, Programming Languages

bash, Bash Builtin, builtin, enable

Get the hang of dbus-monitor command from dbus debian package

[bash light=”true”] $dbus-monitor –session –profile | tee dbus-monitor-profile.txt #type timestamp serial sender destination path interface member # in_reply_to sig 1542567372.723960 2 org.freedesktop.DBus :1.3693 /org/freedesktop/DBus org.freedesktop.DBus NameAcquired sig 1542567372.723980 4 org.freedesktop.DBus :1.3693 /org/freedesktop/DBus org.freedesktop.DBus NameLost sig 1542567373.088315 5 org.freedesktop.DBus :1.3692 /org/freedesktop/DBus org.freedesktop.DBus NameLost sig 1542567373.088350 3737 org.freedesktop.DBus <none> /org/freedesktop/DBus org.freedesktop.DBus NameOwnerChanged sig 1542567373.088364 6 org.freedesktop.DBus :1.3692 […]

Jeffrin Jose T

18 Nov 2018

IPC

dbus, dbus-monitor

Learning D-Bus

https://www.freedesktop.org/wiki/Software/dbus/ https://www.freedesktop.org/wiki/IntroductionToDBus/ https://www.packtpub.com/mapt/book/application_development/9781849519427/10/ch10lvl1sec126/time-for-action–listening-to-d-bus https://dbus.freedesktop.org/doc/dbus-specification.html https://stackoverflow.com/questions/2830858/controlling-gnome-volume-using-dbus https://dbus.freedesktop.org/doc/dbus-tutorial.html#concepts https://dbus.freedesktop.org/doc/diagram.svg https://developer.gnome.org/NetworkManager/stable/spec.html https://developer.gnome.org/NetworkManager/stable/gdbus-org.freedesktop.NetworkManager.html http://www.beautifulwork.org/wp-content/uploads/2018/11/dbus.pdf http://www.beautifulwork.org/wp-content/uploads/2018/11/dbus.docx

Jeffrin Jose T

8 Nov 2018

Learning

d-bus

Meaning of a function wrapper in python exposure

http://wiki.c2.com/?FunctionWrapper https://wiki.python.org/moin/FunctionWrappers

Jeffrin Jose T

6 Nov 2018

Function

function, wrapper

a look into the bash builtin command named “disown”

[bash light=”true”] $jobs -l $ping gnu.org PING gnu.org (208.118.235.148) 56(84) bytes of data. 64 bytes from wildebeest.gnu.org (208.118.235.148): icmp_seq=1 ttl=53 time=267 ms 64 bytes from wildebeest.gnu.org (208.118.235.148): icmp_seq=2 ttl=53 time=266 ms 64 bytes from wildebeest.gnu.org (208.118.235.148): icmp_seq=3 ttl=53 time=267 ms 64 bytes from wildebeest.gnu.org (208.118.235.148): icmp_seq=4 ttl=53 time=321 ms 64 bytes from wildebeest.gnu.org (208.118.235.148): icmp_seq=5 […]

Jeffrin Jose T

4 Nov 2018

command, operating system

disown, job

Hacking with Makefile for machine architecture detection

# SPDX-License-Identifier: GPL-2.0 INCLUDEDIR := -I. CFLAGS := $(CFLAGS) $(INCLUDEDIR) -Wall -O2 -g TEST_GEN_FILES := adi-test UNAME := $(shell uname -m) all: $(TEST_GEN_FILES) $(TEST_GEN_FILES): adi-test.c ifeq ($(UNAME), sparc64) $(info Machine architecture does match) else $(info exit) $(error Machine architecture does not match) endif TEST_PROGS := drivers_test.sh include ../../lib.mk $(OUTPUT)/adi-test: adi-test.c

Jeffrin Jose T

1 Nov 2018

Build, operating system

architecture detection, Makefile, uname -m

Command for PHP information and configuration

[php] $php –info phpinfo() PHP Version => 7.3.0RC3 System => Linux debian 4.17.0-3-amd64 #1 SMP Debian 4.17.17-1 (2018-08-18) x86_64 Build Date => Oct 15 2018 09:53:04 Server API => Command Line Interface Virtual Directory Support => disabled Configuration File (php.ini) Path => /etc/php/7.3/cli Loaded Configuration File => /etc/php/7.3/cli/php.ini Scan this dir for additional .ini files […]

Jeffrin Jose T

16 Oct 2018

command, PHP, Programming Languages

info, PHP

Look into bash builtin command named typeset

$typeset -n gree=55 bash: typeset: 55′: invalid variable name for name reference $typeset -n 55=gree bash: typeset:55=gree’: not a valid identifier$typeset -n gree=pwd$echo $gree $echo $pwd $typeset -n vary=$?bash: typeset: `0′: invalid variable name for name reference$typeset vary=$?$echo $vary1$echo $vary1$echo $?0$echo $vary1$echo varyvary$echo $vary1$echo $vary1$echo $?0$typeset vary=$?$echo $vary0$ $typeset hello $echo $hello $echo $? 0 […]

Jeffrin Jose T

7 Oct 2018

Bash, Bash Builtin

typing, variable

How to use dirs, pushd and popd commands ?

$pushd upstream-kernel/ ~/upstream-kernel ~ $pwd /home/jeffrin/upstream-kernel $cd .. $pushd temp/ ~/temp ~ ~ $dirs ~/temp ~ ~ $dirs -l /home/jeffrin/temp /home/jeffrin /home/jeffrin $pwd /home/jeffrin/temp $pushd ../upstream-kernel/ ~/upstream-kernel ~/temp ~ ~ $dirs -l /home/jeffrin/upstream-kernel /home/jeffrin/temp /home/jeffrin /home/jeffrin $pushd ../testing/ ~/testing ~/upstream-kernel ~/temp ~ ~ $dirs -l /home/jeffrin/testing /home/jeffrin/upstream-kernel /home/jeffrin/temp /home/jeffrin /home/jeffrin $popd ~/upstream-kernel ~/temp ~ ~ […]

Jeffrin Jose T

1 Oct 2018

Bash, Bash Builtin

dirs, popd, pushd

finding source code or source file of a typical bash function

$type -a signals bash: type: signals: not found $type -a _signals _signals is a function _signals () { local -a sigs=($( compgen -P “$1” -A signal “SIG${cur#$1}” )); COMPREPLY+=(“${sigs[@]/#${1}SIG/${1}}”) } $declare -F _signals _signals $shopt -s extdebug $declare -F _signals _signals 862 /usr/share/bash-completion/bash_completion $declare -F _command _command 1732 /usr/share/bash-completion/bash_completion $declare -F compgen $declare -F _grub_dirs […]

Jeffrin Jose T

26 Sep 2018

Bash, Bash

function, shell