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Comment: Improved examples and some more explanation.
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1500
fancy counter thingy, because someone will want one
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Deletions are marked like this. | Additions are marked like this. |
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read -sp "Press [enter] to continue..." | # Bash read -p "Press [enter] to continue..." # Bourne echo "Press [enter] to continue..." read junk |
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# Bash | |
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# Bash | |
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if ! read -sn 1 -t 5 -p "Will resume in 5 seconds. Press any key to abort..." | echo -n "Press a key within 5 seconds to cancel." if ! read -sn 1 -t 5 |
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For those of you who just want to pause for a while, regardless of the user's input, use `sleep`: | If you just want to pause for a while, regardless of the user's input, use `sleep`: |
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If you want a fancy countdown on your timed `read`: {{{ # Bash # This function won't handle multi-digit counts. countdown() { local i echo -n $1 sleep 1 for ((i=$1-1; i>=1; i--)); do printf "\b%d" $i sleep 1 done } echo 'Warning!!' echo -n 'Five seconds to cancel: ' countdown 5 & pid=$! if ! read -s -n 1 -t 5; then echo; echo "boom" else kill $pid; echo; echo "phew" fi }}} (If you test that code in an interactive shell, you'll get "chatter" from the job control system when the child process is created, and when it's killed. But in a script, there won't be any such noise.) |
Is there a "PAUSE" command in bash like there is in MSDOS batch scripts? To prompt the user to press any key to continue?
Use the following to wait until the user presses enter:
# Bash read -p "Press [enter] to continue..." # Bourne echo "Press [enter] to continue..." read junk
Or use the following to wait until the user presses any key to continue:
# Bash read -sn 1 -p "Press any key to continue..."
If you want to put a timeout on that, use the -t option to read:
# Bash echo "WARNING: You are about to do something stupid." echo -n "Press a key within 5 seconds to cancel." if ! read -sn 1 -t 5 then something_stupid fi
If you just want to pause for a while, regardless of the user's input, use sleep:
echo "The script is tired. Please wait a minute." sleep 60
If you want a fancy countdown on your timed read:
# Bash # This function won't handle multi-digit counts. countdown() { local i echo -n $1 sleep 1 for ((i=$1-1; i>=1; i--)); do printf "\b%d" $i sleep 1 done } echo 'Warning!!' echo -n 'Five seconds to cancel: ' countdown 5 & pid=$! if ! read -s -n 1 -t 5; then echo; echo "boom" else kill $pid; echo; echo "phew" fi
(If you test that code in an interactive shell, you'll get "chatter" from the job control system when the child process is created, and when it's killed. But in a script, there won't be any such noise.)