I have the following function:
function pause #for prompted pause until ENTER
{
prompt="$3"
echo -e -n "\E[36m$3" #color output text cyan
echo -e -n '\E[0m' #ends colored output
read -p "$*" #read keys from user until ENTER.
clear
}
pause "Press enter to continue..."
However, my function refuses to apply the cyan color to the string I pass into the function.
A similar question was asked here, but it seems that I'm doing everything correctly...
Try this:
RESTORE='\033[0m'
RED='\033[00;31m'
GREEN='\033[00;32m'
YELLOW='\033[00;33m'
BLUE='\033[00;34m'
PURPLE='\033[00;35m'
CYAN='\033[00;36m'
LIGHTGRAY='\033[00;37m'
LRED='\033[01;31m'
LGREEN='\033[01;32m'
LYELLOW='\033[01;33m'
LBLUE='\033[01;34m'
LPURPLE='\033[01;35m'
LCYAN='\033[01;36m'
WHITE='\033[01;37m'
function test_colors(){
echo -e "${GREEN}Hello ${CYAN}THERE${RESTORE} Restored here ${LCYAN}HELLO again ${RED} Red socks aren't sexy ${BLUE} neither are blue ${RESTORE} "
}
function pause(){
echo -en "${CYAN}"
read -p "[Paused] $*" FOO_discarded
echo -en "${RESTORE}"
}
test_colors
pause "Hit any key to continue"
And there's more fun with backgrounds
echo -e "\033[01;41;35mTRY THIS\033[0m"
echo -e "\033[02;44;35mAND THIS\033[0m"
echo -e "\033[03;42;31mAND THIS\033[0m"
echo -e "\033[04;44;33mAND THIS\033[0m"
echo -e "\033[05;44;33mAND THIS\033[0m"
I've slightly changed your code:
#!/bin/bash
function pause() {
prompt="$1"
echo -e -n "\033[1;36m$prompt"
echo -e -n '\033[0m'
read
clear
}
pause "Press enter to continue..."
What I've changed:
$* causes the result to be seen as a single string. In the OP's read command, all of the arguments passed to the function were output as the prompt. There's nothing in particular wrong with doing it that way. Your point 1 is essentially correct, however, to be consistent with what the OP seems to be doing, it should be $@ instead of $3 (or $1). There's nothing wrong with the OP's ANSI sequence - it works for me.
To save others time:
https://gist.github.com/elucify/c7ccfee9f13b42f11f81
No need to $(echo -ne) all over the place, because the variables defined in the gist above already contain the control characters. The leading/trailing \001 & \002 tell bash that the control characters shouldn't take up space, otherwise using these in a $PS1 will confuse readline.
RESTORE=$(echo -en '\001\033[0m\002')
RED=$(echo -en '\001\033[00;31m\002')
GREEN=$(echo -en '\001\033[00;32m\002')
YELLOW=$(echo -en '\001\033[00;33m\002')
BLUE=$(echo -en '\001\033[00;34m\002')
MAGENTA=$(echo -en '\001\033[00;35m\002')
PURPLE=$(echo -en '\001\033[00;35m\002')
CYAN=$(echo -en '\001\033[00;36m\002')
LIGHTGRAY=$(echo -en '\001\033[00;37m\002')
LRED=$(echo -en '\001\033[01;31m\002')
LGREEN=$(echo -en '\001\033[01;32m\002')
LYELLOW=$(echo -en '\001\033[01;33m\002')
LBLUE=$(echo -en '\001\033[01;34m\002')
LMAGENTA=$(echo -en '\001\033[01;35m\002')
LPURPLE=$(echo -en '\001\033[01;35m\002')
LCYAN=$(echo -en '\001\033[01;36m\002')
WHITE=$(echo -en '\001\033[01;37m\002')
# Test
echo ${RED}RED${GREEN}GREEN${YELLOW}YELLOW${BLUE}BLUE${PURPLE}PURPLE${CYAN}CYAN${WHITE}WHITE${RESTORE}
The problem is that this line:
echo -e -n "\E[36m$3" #color output text cyan
should be:
echo -e -n "\E[36m" #color output text cyan
and you should eliminate this line since you're not using the variable:
prompt="$3"
Also the end sequence should be moved into the read prompt. In fact, the begin sequence can be, too.
The result:
function pause #for prompted pause until ENTER
{
read -p $'\E[36m'"$*"$'\E[0m' #read keys from user until ENTER.
clear
}
pause "Press enter to continue..."
The colors could be put into variables:
cyan=$'\E[36m'
reset=$'\E[0m'
read -p "$cyan$*$reset"
The $'' causes the escape sequence to be interpreted just like echo -e.
