Date: Sun, 21 Sep 2003 21:18:26 +0200 (CEST) From: "Walter C. Pelissero" <walter@pelissero.de> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/57065: core dumps with NODUMP flag Message-ID: <200309211918.h8LJIQ7I000541@hyde.home.loc> Resent-Message-ID: <200309211920.h8LJKFRA072974@freefall.freebsd.org>
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>Number: 57065 >Category: kern >Synopsis: core dumps with NODUMP flag >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: change-request >Submitter-Id: current-users >Arrival-Date: Sun Sep 21 12:20:15 PDT 2003 >Closed-Date: >Last-Modified: >Originator: Walter C. Pelissero >Release: FreeBSD 4.9-PRERELEASE i386 >Organization: >Environment: System: FreeBSD hyde.home.loc 4.9-PRERELEASE FreeBSD 4.9-PRERELEASE #3: Sun Sep 21 21:01:59 CEST 2003 root@hyde.home.loc:/.amd_mnt/daemon/host/usr/warehouse/src/sys/compile/PCG-XG9 i386 >Description: Saving core dumps in backup tapes is something that is seldom desired. Excluding those core dump files from backups would cut on backup time and required tape space. >How-To-Repeat: >Fix: The following patch gives the choice, via a sysctl flag, to automatically create core dumps with the NODUMP flag set, thus automatically excluding those files from the next backup. --- /sys/kern/kern_sig.c.orig Mon May 19 16:41:42 2003 +++ /sys/kern/kern_sig.c Sun Sep 21 21:01:44 2003 @@ -119,6 +119,10 @@ SYSCTL_INT(_kern, OID_AUTO, coredump, CTLFLAG_RW, &do_coredump, 0, "Enable/Disable coredumps"); +static int set_nodump_flag = 0; +SYSCTL_INT(_kern, OID_AUTO, nodump_coredump, CTLFLAG_RW, + &set_nodump_flag, 0, "Enable/Disable setting of NODUMP flag on coredump files"); + /* * Signal properties and actions. * The array below categorizes the signals and their default actions @@ -1656,6 +1660,8 @@ vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p); vattr.va_size = 0; VOP_LEASE(vp, p, cred, LEASE_WRITE); + if (set_nodump_flag) + vattr.va_flags = UF_NODUMP; VOP_SETATTR(vp, &vattr, cred, p); p->p_acflag |= ACORE; VOP_UNLOCK(vp, 0, p); >Release-Note: >Audit-Trail: >Unformatted:
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