Files – Change File Modified Date Using Date from File Name

datefilenamesfiles

Change last modified date of multiple files as per date mentioned in the file's name

Files are

04-01-1981 XXXXXYYYYZZZZ.xml
19-11-1982 XXXXXYYYYZZZZ.xml
25-12-1981 XXXXXYYYYZZZZ.xml

The reason it is needed : I am doing migration of some articles, here each file is an article to be published. And already available custom import utility use file's last modified date as article published date. Hope this helps and clear the reason for it.

Best Answer

POSIXly:

for file in ??-??-????' '*.xml; do
  date=${file%% *}
  year=${date##*-}
  day=${date%%-*}
  month=${date%-*}
  month=${month#*-}
  touch -d "$year-$month-$day 00:00:00" -- "$file"
done

With zsh, you can shorten it to:

for f (??-??-????' '*.xml(N))
  touch -d "$f[7,10]-$f[4,5]-$f[1,2] 00:00:00" -- $f

Related Solutions

Change server date using PHP

You can do that with sudo, without giving "root" permissions to apache.

apache <hostname> = (root) NOPASSWD: /bin/date

Which in English translates roughly to:

Let the apache user run the /bin/date command as the root user without requiring a password on server <hostname>.

Using sudo, (or doing the equivalent in any RBAC model) allows you to expose only the privileges you need to, to specific users, to accomplish your goals.

Then in PHP, just pass the sudo in along with the command:

exec("sudo -su /bin/date <newdate>");

Also, if that's not working for you, check your /etc/sudoers file for requiretty:

Defaults        requiretty

You'll need to comment that out, for sudo to work with apache.

Bash – Test if File was Modified After Date in File Name

Here are some possible ways with :

OSX stat:

newer () {
tstamp=${1:${#1}-12:8}
mtime=$(stat -f "%Sm" -t "%Y%m%d" "$1")
[[ ${mtime} -le ${tstamp} ]] && printf '%s\n' "$1 : NO: mtime is ${mtime}" || printf '%s\n' "$1 : YES: mtime is ${mtime}"
}

GNU date:

newer () {
tstamp=${1:${#1}-12:8}
mtime=$(date '+%Y%m%d' -r "$1")
[[ ${mtime} -le ${tstamp} ]] && printf '%s\n' "$1 : NO: mtime is ${mtime}" || printf '%s\n' "$1 : YES: mtime is ${mtime}"
}

zsh only:

zmodload zsh/stat
newer () {
tstamp=${1:${#1}-12:8}
mtime=$(zstat -F '%Y%m%d' +mtime -- $1)
[[ ${mtime} -le ${tstamp} ]] && printf '%s\n' "$1 : NO: mtime is ${mtime}" || printf '%s\n' "$1 : YES: mtime is ${mtime}"
}

Usage:

newer FILE

Example output:

file-name-20150909.txt : YES: mtime is 20151026

file-name-20151126.txt : NO: mtime is 20151026

Best Answer

Related Solutions

Change server date using PHP

Bash – Test if File was Modified After Date in File Name

Related Question