Date: Mon, 7 Dec 2020 20:36:58 +0000 (UTC) From: Gordon Bergling <gbe@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r368418 - in stable/12: sbin/mount share/man/man5 Message-ID: <202012072036.0B7Kawhq060003@repo.freebsd.org>
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Author: gbe (doc committer) Date: Mon Dec 7 20:36:58 2020 New Revision: 368418 URL: https://svnweb.freebsd.org/changeset/base/368418 Log: MFC r350224 by sobomax: Allow "update" option to be used in the fstab(5). Document possible use case. Approved by: sobomax Differential Revision: https://reviews.freebsd.org/D18586 Modified: stable/12/sbin/mount/mount.c stable/12/share/man/man5/fstab.5 Directory Properties: stable/12/ (props changed) Modified: stable/12/sbin/mount/mount.c ============================================================================== --- stable/12/sbin/mount/mount.c Mon Dec 7 18:58:08 2020 (r368417) +++ stable/12/sbin/mount/mount.c Mon Dec 7 20:36:58 2020 (r368418) @@ -361,6 +361,7 @@ main(int argc, char *argv[]) else failok = 0; if (!(init_flags & MNT_UPDATE) && + !hasopt(fs->fs_mntops, "update") && ismounted(fs, mntbuf, mntsize)) continue; options = update_options(options, fs->fs_mntops, Modified: stable/12/share/man/man5/fstab.5 ============================================================================== --- stable/12/share/man/man5/fstab.5 Mon Dec 7 18:58:08 2020 (r368417) +++ stable/12/share/man/man5/fstab.5 Mon Dec 7 20:36:58 2020 (r368418) @@ -190,6 +190,32 @@ see the .Xr mount 8 manual page. .Pp +If the option +.Dq update +is specified, it indicates that the status of an already mounted file +system should be changed accordingly. +This allows, for example, file systems mounted read-only to be upgraded +read-write and vice-versa. +By default, an entry corresponding to a file systems that is already +mounted is going to be skipped over when processing +.Nm , +unless it's a root file system, in which case logic similar to +.Dq update +is applied automatically. +.Pp +The +.Dq update +option is typically used in conjuction with two +.Nm +files. +The first +.Nm +file is used to set up the initial set of file systems. +The second +.Nm +file is then run to update the initial set of file systems and +to add additional file systems. +.Pp The type of the mount is extracted from the .Fa fs_mntops field and stored separately in the
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