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Somehow my zsh history shows wrong timestamps like this.

❯ history -E 1 | tail -20 6047 31.12.2019 15:08 babel-node 6048 31.12.2019 15:08 node -v 6049 31.12.2019 15:08 git diff 6050 31.12.2019 15:08 rm package-lock.json 6051 31.12.2019 15:08 yarn update 6052 31.12.2019 15:08 yarn 6053 31.12.2019 15:08 rm yarn.lock 6054 31.12.2019 15:08 yarn install 6055 31.12.2019 15:08 yarn serve 6056 31.12.2019 15:08 exit 6058 31.12.2019 15:00 bin/rails s 6059 31.12.2019 15:00 cd ../my_project 6060 31.12.2019 15:00 bin/rails c 6062 31.12.2019 15:03 man history 6063 31.12.2019 15:03 vi ~/.bash_history 6064 31.12.2019 15:03 vi ~/.zsh_history 6065 31.12.2019 15:04 zsh -f 6066 31.12.2019 15:06 fc -li 100 6067 31.12.2019 15:08 history -E 1 | tail -100

All command those timesstamps 15:08 except the latest history command are executed before yesterday. The timestamps for old commands refresh every time history command is executed.

Though I'm going to clear history data, I don't want to encounter the same bug. Does anyone know what causes this error and how to prevent it?

I'm using zsh 5.3 (x86_64-apple-darwin18.0) in iTerm2.

variables

These are my hist related variables. 

❯ env | grep HIST ❯ typeset | grep HIST HISTCHARS='!^#' integer 10 readonly HISTCMD=6119 HISTFILE=/Users/ironsand/.zsh_history integer 10 HISTSIZE=10000 integer 10 SAVEHIST=10000
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  • What *HIST* variables (and related options) have you set in your shell, and to what values? Commented Dec 31, 2019 at 7:45
  • 1
    I added variables probably related to history command. Commented Jan 6, 2020 at 12:13

1 Answer 1

Reset to default
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If you don't have the EXTENDED_HISTORY shell option set in zsh, then the history events that are saved to $HISTFILE will be saved without timestamps.

When you use history -E 1, the history events are printed from the start of the in-memory history to the end, with timestamps (formatted in a particular way).

History entries that were read from $HISTFILE don't have timestamps, so they are assigned the timestamp corresponding to the time when the history command was executed.

To save timestamps with each history event, enable the EXTENDED_HISTORY shell option. To do this for all future interactive zsh shell session, modify your $ZDOTDIR/.zshrc file and add

setopt EXTENDED_HISTORY
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