如何使用bash脚本检查AIX中文件的最后修改日期？

Question

I want to check last modified date of a file in AIX using bash script.

I ve tried,

date -r file.txt "+%m-%d-%Y"
stat -c %y file.txt

but not working in AIX.

Answer 1

If you can't find an appropriately specific utility, you can always fall back on perl:

perl -MPOSIX=strftime -e 'printf "%s\n", strftime("%c", localtime((stat(shift @ARGV))[8]))' filename

or more legibly:

perl -e '
    use POSIX qw(strftime);
    my $filename  = shift @ARGV;
    my @filedata  = stat $filename;
    my $mtime     = $filedata[8];
    my @timedata  = localtime $mtime;
    my $timestamp = strftime "%c", @timedata;
    print "$timestamp\n";
' filename

Choose a strftime format to your liking. If you just need the epoch time, print $mtime .

Answer 2

How about:

istat file
Inode 263 on device 10/8        File
Protection: rw-r--r--
Owner: 0(root)          Group: 0(system)
Link count:   1         Length 14682 bytes

Last updated:   Tue Sep 15 10:50:15 PDT 2018
Last modified:  Tue Sep 15 10:50:15 PDT 2018
Last accessed:  Tue Nov  3 12:01:12 PST 2018

In case you haven't figured it out yet:

date -d "$( istat file | awk '/modified/{gsub( /^[^:]+: +/,"",$0); print}' )"   "+%m-%d-%Y"

PS: "+%m-%d-%Y" is a silly date format, because it doesn't sort naturally. "+%Y-%m-%d" would make far more sense.