Portable echo shell function

Portable echo shell function for POSIX compliant shells. It works exactly the same in all shells.

Functions

• puts - Output as is without interpreting escape sequences and options.
• putsn - puts with newline.
• echo - Overwrite built-in echo. Only supported -n option.

Solved the problem

Problem

echo -e "\e[31m RED \e[m"

Shell	Output	Shell	Output
dash	-e RED	mksh	RED
bash	RED	yash	-e \e[31mRED\e[m
zsh	RED	posh	-e \e[31mRED\e[m
ksh	\e[31mRED\e[m	busybox ash	RED

Portable echo shell function

echo -e "\e[31m RED \e[m"

Shell	Output	Shell	Output
dash	-e \e[31m RED \e[m	mksh	-e \e[31m RED \e[m
bash	-e \e[31m RED \e[m	yash	-e \e[31m RED \e[m
zsh	-e \e[31m RED \e[m	posh	-e \e[31m RED \e[m
ksh	-e \e[31m RED \e[m	busybox ash	-e \e[31m RED \e[m

How to output with color.

ESC=$(printf '\033')
echo "${ESC}[31m RED ${ESC}[m"

Shell	Output	Shell	Output
dash	RED	mksh	RED
bash	RED	yash	RED
zsh	RED	posh	RED
ksh	RED	busybox ash	RED