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autofs-5.1.7 - add missing desciption of null map option
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From: Ian Kent <raven@themaw.net>
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The description of how the -null master map option behaves is
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mising from auto.master(5).
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Signed-off-by: Ian Kent <raven@themaw.net>
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---
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CHANGELOG | 1 +
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man/auto.master.5.in | 19 +++++++++++++++++++
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2 files changed, 20 insertions(+)
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--- autofs-5.1.7.orig/CHANGELOG
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+++ autofs-5.1.7/CHANGELOG
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@@ -75,6 +75,7 @@
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- fix hosts map offset order.
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- fix direct mount deadlock.
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- fix lookup_prune_one_cache() refactoring change.
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+- add missing description of null map option.
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25/01/2021 autofs-5.1.7
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- make bind mounts propagation slave by default.
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--- autofs-5.1.7.orig/man/auto.master.5.in
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+++ autofs-5.1.7/man/auto.master.5.in
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@@ -265,6 +265,25 @@ accessing /net/myserver will mount expor
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NOTE: mounts done from a hosts map will be mounted with the "nosuid,nodev" options
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unless overridden by explicitly specifying the "suid", "dev" options in the
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master map entry.
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+.SH BUILTIN MAP \-null
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+If "\-null" is given as the map it is used to tell automount(8) to ignore a subsequent
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+master map entry with the given path.
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+.P
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+It can only be used for paths that appear in the master map (or in direct mount maps).
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+.P
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+An indirect mount map top level mount point path can be nulled. If so no mounts from
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+the nulled mount are performed (essentially it isn't mounted).
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+.P
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+Direct mount map path entries can be nulled. Since they must be present at startup
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+they are (notionally) part of the master map.
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+.P
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+A nulled master map entry path will ignore a single subsequent matching entry. Any
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+matching entry following that will be treated as it normally would be. An example
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+use of this is allowing local master map entries to override remote ones.
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+.P
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+NOTE: If a duplicate master map entry path is seen (excluding paths of null entries)
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+it will be ignored and noted in the log, that is the first encountered master map
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+entry is used unless there is a corresponding null entry.
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.SH LDAP MAPS
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If the map type \fBldap\fP is specified the mapname is of the form
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\fB[//servername/]dn\fP, where the optional \fBservername\fP is
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