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Full Discussion: Before I delete any file in Unix, How can I check no open file handle is pointing to that file?
Operating Systems Solaris Before I delete any file in Unix, How can I check no open file handle is pointing to that file? Post 302459828 by achenle on Tuesday 5th of October 2010 12:34:37 PM
Old 10-05-2010
Yes - it's "fuser".

And FWIW, assuming you're running on Solaris (as this is posted under the Solaris topic...), fuser on Solaris is a lot faster than lsof on Linux. The last time I looked at the lsof source code it was doing nothing more than searching through the entire /proc file system looking for a match to the file(s) it was given. The Solaris implementation of fuser operates fully inside the kernel (see /usr/include/sys/utssys.h on a Solaris box for the actual system call that does the work) and it seems to me that the Solaris kernel pretty much has to have a direct way of finding the processes that have that file open since it returns so fast - it seems way too fast to be searching unless what it's searching is really small.
 

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LEARN ABOUT OPENSOLARIS

lx

lx(5)							Standards, Environments, and Macros						     lx(5)

NAME

       lx - Linux branded zone

DESCRIPTION

       The  lx	brand  uses  the branded zones framework described in brands(5) to enable Linux binary applications to run unmodified on a machine
       with a Solaris Operating System kernel.

       The lx brand includes the tools necessary to install a CentOS 3.x or Red Hat Enterprise Linux 3.x distribution inside  a  non-global  zone.
       The  brand  supports  the  execution of 32-bit Linux applications on x86/x64 machines running the Solaris system in either 32-bit or 64-bit
       mode.

   Supported Linux Distributions
       The lx brand emulates the system call interfaces provided by the Linux 2.4.21 kernel, as modified by Red Hat in the RHEL 3.x distributions.
       This kernel provides the system call interfaces consumed by the glibc version 2.3.2 released by Red Hat.

       In addition, the lx brand partially emulates the Linux /dev and /proc interfaces.

   Configuration and Administration
       The  lx brand supports the whole root non-global zone model. All of the required linux packages are installed into the private file systems
       of the zone.

       The zonecfg(1M) utility is used to configure an lx branded zone. Once a branded zone has  been  installed,  that  zone's  brand	cannot	be
       changed	or removed. The zoneadm(1M) utility is used to report the zone's brand type and administer the zone. The zlogin(1) utility is used
       to log in to the zone.

   Application Support
       The lx zone only supports user-level Linux applications. You cannot use Linux device drivers, Linux kernel modules, or Linux  file  systems
       from inside an lx zone.

       You cannot add any non-standard Solaris devices to a Linux zone. Any attempt to do so will result in a zone that zonecfg(1M) will refuse to
       verify.

       You cannot run Solaris applications inside an lx zone. Solaris debugging tools such as DTrace (see dtrace(1M)) and mdb (see mdb(1)) can	be
       applied to Linux processes executing inside the zone, but the tools themselves must be running in the global zone. Any core files generated
       are produced in the Solaris format, and such files can only be debugged with Solaris tools.

ATTRIBUTES

       See attributes(5) for a description of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWlxr, SUNWlxu		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mdb(1), zlogin(1), zonename(1), dtrace(1M), zoneadm(1M), zonecfg(1M), brands(5), zones(5), lx_systrace(7D)

SunOS 5.11							    19 Sep 2006 							     lx(5)
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