cjzjm100 wrote: > Hi ,guys! > I had used the command:tar -N '2008/04/13' -zcvf test1.tar.gz . to > package some files. there are some files modified before 2008/04/13 in > the currently directory,but why they are in the test1.tar.gz too? While looking at the tar man page, I see the following: > -N, --after-date DATE, --newer DATE > only store files newer than DATE > > --newer-mtime DATE > like --newer, but with a DATE I didn't like the explanation, so I looked at the info file for tar: > `--after-date=DATE' > `--newer=DATE' > `-N DATE' > Only store files newer than DATE. > > Acts on files only if their modification or inode-changed times are > later than DATE. Use in conjunction with any operation. > > If DATE starts with `/' or `.', it is taken to be a file name; the > last-modified time of that file is used as the date. > > `--newer-mtime=DATE' > Acts like `--after-date=DATE' (`--newer=DATE', `-N DATE'), but > only looks at modification times. > > These options limit `tar' to only operating on files which have been > modified after the date specified. A file is considered to have > changed if the contents have been modified, or if the owner, > permissions, and so forth, have been changed. (For more information on > how to specify a date, see *Note Date input formats::; remember that the > entire date argument must be quoted if it contains any spaces.) > > Gurus would say that `--after-date=DATE' (`--newer=DATE', `-N DATE') > tests both the `mtime' (time the contents of the file were last > modified) and `ctime' (time the file's status was last changed: owner, > permissions, etc) fields, while `--newer-mtime=DATE' tests only `mtime' > field. > > To be precise, `--after-date=DATE' (`--newer=DATE', `-N DATE') > checks _both_ `mtime' and `ctime' and processes the file if either one > is more recent than DATE, while `--newer-mtime=DATE' only checks > `mtime' and disregards `ctime'. Neither uses `atime' (the last time the > contents of the file were looked at). Based on this explantation, it begs the question: Does it work for you with --newer-mtime=DATE rather than -N DATE which doesn't do what you want? > Here ware what i did: > [cjzjm100@localhost test1]$ ll > total 28 > drwxr-xr-x 4 cjzjm100 cjzjm100 4096 04-13 19:18 2 > -rw-r--r-- 1 cjzjm100 cjzjm100 0 04-10 20:57 hello > -rw-r--r-- 1 cjzjm100 cjzjm100 0 04-01 00:00 hello1 > -rw-r--r-- 1 cjzjm100 cjzjm100 0 04-10 21:18 hello2 > drwxr--r-- 2 cjzjm100 cjzjm100 4096 04-13 17:11 testing > [cjzjm100@localhost test1]$ rm -r 2 > [cjzjm100@localhost test1]$ tar -N '2008/04/13' -zcvf test1.tar.gz . > tar: Treating date `2008/04/13' as 2008-04-13 00:00:00 + 0 nanoseconds > ./ > ./testing/ > ./testing/hello.c > ./testing/hello2.c > ./testing/hello > ./hello1 > ./test1.tar.gz > ./hello2 > ./hello > why the files modified before 2008/04/13 like hello were also in the > package? > there is a file named test1.tar.gz in the test1.tar.gz,why? > > Reply With Quote > > -- Kevin J. Cummings kjchome@xxxxxxx cummings@xxxxxxxxxxxxxxxxxx cummings@xxxxxxxxxxxxxxxxxxxxxxx Registered Linux User #1232 (http://counter.li.org)
