We have a user where a process is behaving abnormally and crashing. It would be great if a core file was generated, but I don't see one.
There is no core file being created in the /opt/core directory. Now, I have asked the user to submit the output of errpt -a and to check for errors with the following: LABEL: CORE_DUMP_FAILED.
There were none, unfortunately.
The user does not have root access to the AIX box, which means they cannot modify the location where core files are being generated, which I don't think would matter.
My question is whether having root access could be responsible for the core files not being generated or could it be some other cause?
Last edited by Don Cragun; 03-29-2016 at 05:38 PM..
Reason: Add missing CODE and ICODE tags.
I have a requirement to be able to issue selected commands with root privileges but don't have the ability to su to root due to audit requirements dictating that only our UNIX SA's have that feature.
I was told that Powerbroker would allow me to run the commands as root but our security people... (1 Reply)
Whenever i send a mail like: mail <mail id>, a core file is created under /var/spool/mqueue/ path. This is increasing the space of the file system. Why is that core file get created. Does it happens normally. I am getting an errpt error as:
LABEL: CORE_DUMP
IDENTIFIER: B6048838
... (0 Replies)
Hi All,
How to we get to know when say a new log file is created on an Unix box.
I need to trigger a process(say a script) when the new log file is created.
But i need to know by some means or generate a trigger when a new file is created????
Something like when we receive a new mail we... (1 Reply)
Hello,
I have a file Test.txt with 9 columns that looks like this:
1g12 A 14 19 2OAY A 326 331 AAAASA
1l7v A 68 73 1l7v A 68 73 AALAIS
1l7v A 68 73 1XVW B 72 77 AALAIS
1l7v A 68 73 1XXU A 65 70 AALAIS
1l7v A 68 73 1XXU B 65 70 AALAIS
1l7v A 68 73 1XXU C 65 70 AALAIS
1l7v A 68 73 1XXU D... (4 Replies)
Hi,
I have a SCO Unix ver 5.0.7 from which I need to get some files. The problem is that I'm working remotely (have no physical access) and using Dejawin because this server is only has a serial connection to a Windows machine. Ucopy isn't on the server. What I was thinking is to do a print... (5 Replies)
1. The problem statement, all variables and given/known data:
When looking for corefiles, include any file with core in its name. (Some UNIX/Linux systems add the PID of the process that created the core to reduce the chances of overwriting an already existing core file that might be needed. The... (6 Replies)
Hi,
I have used expdp for datapump. The .dmp file is created by the "oracle" user.
my requirement is to make a zipped file of this .dmp file.
What i am trying to do is change the permissions of this .dmp file from 0640 to 0644 and then do a gzip and zip it. Is there any way i can change... (3 Replies)
hi,
i have a script wrriten where there is a temporary files getting created:
echo "From:" ${usrname}@apps.mc.xerox.com>mail_txt
it was working from a long time but now there is a error creating while creating this temporary file. here is the error log for this:... (15 Replies)
Hi,
Currently, we have a Perl script from a third-party vendor that is generating core dumps. It has been reported. We can't turn off the script as it does generate some diagnostic file that's required. So at the moment, we have to let it continue to do its run.
I wish I can say the vendor is... (8 Replies)
Discussion started by: newbie_01
8 Replies
LEARN ABOUT FREEBSD
core
CORE(5) BSD File Formats Manual CORE(5)NAME
core -- memory image file format
SYNOPSIS
#include <sys/param.h>
DESCRIPTION
A small number of signals which cause abnormal termination of a process also cause a record of the process's in-core state to be written to
disk for later examination by one of the available debuggers. (See sigaction(2).) This memory image is written to a file named by default
programname.core in the working directory; provided the terminated process had write permission in the directory, and provided the abnormal-
ity did not cause a system crash. (In this event, the decision to save the core file is arbitrary, see savecore(8).)
The maximum size of a core file is limited by setrlimit(2). Files which would be larger than the limit are not created.
The name of the file is controlled via the sysctl(8) variable kern.corefile. The contents of this variable describes a filename to store the
core image to. This filename can be absolute, or relative (which will resolve to the current working directory of the program generating
it).
The following format specifiers may be used in the kern.corefile sysctl to insert additional information into the resulting core file name:
%H Machine hostname.
%I An index starting at zero until the sysctl debug.ncores is reached. This can be useful for limiting the number of corefiles
generated by a particular process.
%N process name.
%P processes PID.
%U process UID.
The name defaults to %N.core, yielding the traditional FreeBSD behaviour.
By default, a process that changes user or group credentials whether real or effective will not create a corefile. This behaviour can be
changed to generate a core dump by setting the sysctl(8) variable kern.sugid_coredump to 1.
Corefiles can be compressed by the kernel if the following items are included in the kernel configuration file:
options COMPRESS_USER_CORES
devices gzio
When COMPRESS_USER_CORES is included the following sysctls can control if core files will be compressed:
kern.compress_user_cores_gzlevel Gzip compression level. Defaults to -1.
kern.compress_user_cores Actually compress user cores. Core files will have the suffix .gz appended to them.
EXAMPLES
In order to store all core images in per-user private areas under /var/coredumps, the following sysctl(8) command can be used:
sysctl kern.corefile=/var/coredumps/%U/%N.core
SEE ALSO gdb(1), kgdb(1), setrlimit(2), sigaction(2), sysctl(8)HISTORY
A core file format appeared in Version 6 AT&T UNIX.
BSD November 22, 2012 BSD