mirror of
https://github.com/notwa/rc
synced 2024-11-05 07:09:02 -08:00
16 lines
506 B
Bash
Executable file
16 lines
506 B
Bash
Executable file
#!/usr/bin/env sh
|
|
# compat: -ash +bash +dash +hush +ksh +mksh +oksh +osh +posh +yash +zsh
|
|
|
|
days() { ### @-
|
|
### compute the number of days since a given date.
|
|
###
|
|
### ```
|
|
### $ days 'January 1 1970'
|
|
### 18838
|
|
### ```
|
|
# FIXME: this doesn't always work in busybox because its `date` is too simple.
|
|
[ $# -le 1 ] || { printf "%s\n" "$0: too many arguments" >&2; return 1; }
|
|
echo $(( ($(date +%s) - $(date -d "$1" +%s)) / 60 / 60 / 24 ))
|
|
}
|
|
|
|
[ -n "${preload+-}" ] || days "$@"
|