Powerfull Find

[Dennis Handly · Accepted solution]

find(1) works two ways depending if UNIX95 is exported. The find(1) describes UNIX95, which isn't the default.
time is now 27:1800
25:0000 2*24:1800 26:0000 1*24:1800 27:0000 0*24:1800
file X file1 X file2 NOW
Default: takes time / day and truncates
2 X 1 X 0
+0 X +0 X X
+1 X X X -1

UNIX95: takes time in seconds and compares N thru N-1 as =, - as < N-1, + as > N
file X file1 X file2 NOW
3 X 2 X 1
+0 X +0 X +0
+1 X +1 X X
+2 X X X -2

[Dennis Handly]

If you are happy with the answers you have gotten, please read the following about assigning points:
http://forums.itrc.hp.com/service/forums/helptips.do?#33

[AZayed]

Hi Dennis,

I didn't understand your last example, can you explain it a little.

Thanks

[Dennis Handly]

>can you explain it a little.

Which parts? How find(1) works with and without UNIX95?

Default:
25:0000 2*24:1800 26:0000 1*24:1800 27:0000 0*24:1800

This is a timeline, Oct 25, 0000; a time 2 days ago at 1800; then Oct 26, ... Oct 27, then "now at Oct 27, 1800.
Default: takes time / day and truncates

With UNIX95, it does this fuzzy compare that is documented in find(1).

[James R. Ferguson]

Hi (again):

> Dennis: With UNIX95, it does this fuzzy compare that is documented in find(1).

And just where in the HP-UX manpages did you find [ no pun intended ] that? I can't seem to locate a reference to either XPG4 or UNIX95 that points at this logic. The GNU Linux manpages are a bit more explicit in stating that "... When find figures out how many 24-hour periods ago the file was last accessed, any fractional part is ignored..."

Regards!

...JRF...

[AZayed]

Hi,

Thanks for answering, my last question is how to run find command in UNIX95 environment.

Regards,

[OldSchool]

setting the UNIX95 variable in the command line for find will do it, for example

UNIX95= find . -name testdunce -mtime ....

setting / exporting UNIX95 will also work, but I don't recommend that approach as that variable influences a bunch of different things, like the "ps" command as well, and so could inadvertantly cause havoc.

[OldSchool]

also, note that UNIX95= was followed by a space....

[AZayed]

Thanks,

A lot of useful information & ideas,

Regards,

[Dennis Handly]

>JRF: And just where in the HP-UX manpages did you find that?

I had to look at the 11.31 sources.

>... When find figures out how many 24-hour periods ago the file was last accessed, any fractional part is ignored..."

That's the default, non UNIX95 functionality.