stat command on Solaris

devUnix · 03-14-2012, 12:25 PM

Gurus!

(Well, by "Gurus" I mean everyone out here looking at this question.)

I, in a separate post here, asked how to check the "file creation time" and not just the "change/modification/access times". Somebody did a good job and gave pointers to resources that explain that if we run "stat" command on an ext4 filesystem then we may get this information as it will appear in the last line "crtime" meaning the birth date of a file.

Well, out of curiosity I hit the command "stat fileName" on my Solaris 10 OS / OpenSolaris as well. But it screamed out: "Command not found".

So, I need this "stat" command which I use on Linux flavours without any issue. How to get it on Solaris?

On "forums.oracle.com", there is a similar discussion but it does not help me much.

I just got this piece of information on Solaris by executing the man command:

Code:

man 8 stat

and here is an excert from it:

PHP Code:




System Calls                                              stat(2)

NAME
     stat, lstat, fstat, fstatat - get file status

SYNOPSIS
     #include <fcntl.h>
     #include <sys/types.h>
     #include <sys/stat.h>

     int stat(const char *restrict path, struct stat *restrict buf);

     int lstat(const char *restrict path, struct stat *restrict buf);

     int fstat(int fildes, struct stat *buf);

     int fstatat(int fildes, const char *path, struct stat *buf,
         int flag);

DESCRIPTION
     The stat()  function  obtains  information  about  the  file
     pointed  to  by  path. Read, write, or execute permission of
     the named file is not required, but all  directories  listed
     in the path name leading to the file must be searchable.

So, could anybody either show me how to get "stat" on Solaris? Or how to use the "stat()" function in a "C" program on Solaris?

jlliagre · 03-14-2012, 05:58 PM

The GNU command stat is bundled with OpenSolaris and Solaris 11 and available on the Solaris companion CD with Solaris 10. However, GNU stat isn't fully aware of Solaris file system capabilities so I would suggest to use ls instead to get file information.

For example on Solaris 11 stat is unable to display the file creation time while ls does it well when given the proper options. stat doesn't either show ACLs.

Code:

$ ls -l z
-rw-rw-rw-+  1 jlliagre staff         29 Mar 14 22:48 z
$ stat z
  File: `z'
  Size: 29              Blocks: 2          IO Block: 512    regular file
Device: 1a50008h/27590664d      Inode: 125613      Links: 1
Access: (0666/-rw-rw-rw-)  Uid: (  101/jlliagre)   Gid: (   10/   staff)
Access: 2012-03-14 22:49:15.242808311 +0100
Modify: 2012-03-14 22:48:36.115123337 +0100
Change: 2012-03-14 22:52:11.751512260 +0100
$ ls -siv -@ -/ c -%all z
    125613    2 -rw-rw-rw-+  1 jlliagre staff         29 Mar 14 22:48 z
                {A------m--}
         timestamp: atime         Mar 14 22:49:15 2012 
         timestamp: ctime         Mar 14 22:52:11 2012 
         timestamp: mtime         Mar 14 22:48:36 2012 
         timestamp: crtime         Dec 19 09:56:17 2011 
     0:user:daemon:read_data:deny
     1:owner@:read_data/write_data/append_data/read_xattr/write_xattr
         /read_attributes/write_attributes/read_acl/write_acl/write_owner
         /synchronize:allow
     2:group@:read_data/write_data/append_data/read_xattr/read_attributes
         /read_acl/synchronize:allow
     3:everyone@:read_data/write_data/append_data/read_xattr/read_attributes
         /read_acl/synchronize:allow

devUnix · 03-16-2012, 04:31 PM

The options "-/" and "-%" (all) do not work with "ls". I checked it on CentOS 6.0 and Solaris 10:

PHP Code:



bash-3.2# uname -a 
SunOS dev-host 5.10 Generic_147441-01 i86pc i386 i86pc 
 
bash-3.2# cat /etc/release 
                    Oracle Solaris 10 8/11 s10x_u10wos_17b X86 
  Copyright (c) 1983, 2011, Oracle and/or its affiliates. All rights reserved. 
                            Assembled 23 August 2011 
bash-3.2#

The other options work and make sense on Solaris but not on Linux as Linux complains about "-@" also:

Code:

bash-3.2# ls -siv -@ -c z
    297581    0 -rw-r--r--   1 root     root           0 Mar 17 02:53 z
     0:user::rw-
     1:group::r--               #effective:r--
     2:mask:r--
     3:other:r--
bash-3.2#

Code:

[demo@localhost ~]$ ls -siv -c z
65721 1 z
[demo@localhost ~]$

jlliagre · 03-16-2012, 06:04 PM

My example was, as I wrote, on Solaris 11. There is no much point trying to use the options presented with Centos which is not Solaris and which uses GNU ls, not Solaris ls. Some of the options are not implemented either on Solaris 10 as you noticed.

I'm unclear about what you are trying to achieve. If you want to see what the stat library function do, here is a way:

Code:

$ truss -t lstat64 -v lstat64 ls z
lstat64("z", 0x08046120)			= 0
    d=0x01A50002 i=329844 m=0100644 l=1  u=101   g=10    sz=0
	at = Mar 16 22:31:34 CET 2012  [ 1331933494.369354656 ]
	mt = Mar 16 22:23:04 CET 2012  [ 1331932984.529923081 ]
	ct = Mar 16 23:00:52 CET 2012  [ 1331935252.974425479 ]
    bsz=512   blks=1     fs=zfs
z

This should work on both Solaris 10 and 11.

Here is something similar that should work on Centos:

Code:

$ strace -v -e trace=stat ls z
stat("z", {st_dev=makedev(8, 8), st_ino=665469, st_mode=S_IFREG|0644, st_nlink=1,
st_uid=1000, st_gid=1000, st_blksize=4096, st_blocks=0, st_size=0,
st_atime=2012/03/17-00:05:50, st_mtime=2012/03/17-00:05:50,
st_ctime=2012/03/17-00:05:50}) = 0
z

devUnix · 03-17-2012, 02:28 PM

Quote:

Originally Posted by jlliagre

I'm unclear about what you are trying to achieve.

You had already got it and provided the insight on the problem by introducing the interesting options to the "ls" command. I just wondered if the "ls" command on CentOS 6 or Solaris 10 had similar options.

The last one that you have given above is not working on my CentOS 6:

Code:

[demo@localhost ~]$ strace -v -e trace=stat ls z
z
[demo@localhost ~]$

By the way, thanks again for your time and effort! You're appreciated!

jlliagre · 03-17-2012, 03:48 PM

Quote:

Originally Posted by devUnix

The last one that you have given above is not working on my CentOS 6:

Okay, try that slightly modified one:

Code:

strace -v -e trace=lstat ls z

devUnix · 03-17-2012, 05:23 PM

Quote:

Originally Posted by jlliagre

Okay, try that slightly modified one:

Code:

strace -v -e trace=lstat ls z

Same output:

Code:

[demo@localhost ~]$ strace -v -e trace=lstat ls z
z

But at least you showed how to use them. Thanks!

jlliagre · 03-18-2012, 05:14 AM

Double check. The first command I suggested works fine here with Centos 6:

Code:

[demo@localhost ~]$ cat /etc/redhat-release
CentOS release 6.2 (Final)
[demo@localhost ~]$ stat z
  File: `z'
  Size: 29          Blocks: 8          IO Block: 4096   regular file
Device: fd00h/64768d  Inode: 16983       Links: 1
Access: (0660/-rw-rw----)  Uid: (  500/    demo)   Gid: (  500/    demo)
Access: 2012-03-18 11:06:28.394729259 +0100
Modify: 2012-03-18 11:06:31.563148813 +0100
Change: 2012-03-18 11:06:38.217166359 +0100
[demo@localhost ~]$ strace -v -e trace=stat ls z
stat("z", {st_dev=makedev(253, 0), st_ino=16983, st_mode=S_IFREG|0660,
st_nlink=1, st_uid=500, st_gid=500, st_blksize=4096, st_blocks=8,
st_size=29, st_atime=2012/03/18-11:06:28, st_mtime=2012/03/18-11:06:31, st_ctime=2012/03/18-11:06:38}) = 0
z