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autofs-5.1.0 - handle duplicates in multi mounts
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From: Ian Kent <ikent@redhat.com>
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Duplicate entries in multi-mounts are a syntax error however some
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other automount implementations allow them and attempt to continue
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with the mount anyway.
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This patch turns a detected duplicate error into a success return
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in order to continue.
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Since it can't be known if the first or the later entry is the
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correct one to use the later replaces the old unless a memory
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allocation error occures in which case the old entry is retained
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and the change is noted in the log.
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---
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CHANGELOG | 1 +
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lib/cache.c | 19 ++++++++++++++++++-
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modules/parse_sun.c | 5 +++--
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3 files changed, 22 insertions(+), 3 deletions(-)
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--- autofs-5.0.7.orig/CHANGELOG
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+++ autofs-5.0.7/CHANGELOG
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@@ -165,6 +165,7 @@
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- add a prefix to program map stdvars.
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- add config option to force use of program map stdvars.
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- fix incorrect check in parse_mount().
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+- handle duplicates in multi mounts.
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25/07/2012 autofs-5.0.7
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=======================
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--- autofs-5.0.7.orig/lib/cache.c
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+++ autofs-5.0.7/lib/cache.c
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@@ -733,8 +733,25 @@ int cache_update_offset(struct mapent_ca
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me = cache_lookup_distinct(mc, key);
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if (me && me->age == age) {
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- if (me == owner || strcmp(me->key, key) == 0)
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+ if (me == owner || strcmp(me->key, key) == 0) {
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+ char *pent;
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+
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+ warn(logopt,
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+ "duplcate offset detected for key %s", me->key);
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+
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+ pent = malloc(strlen(mapent) + 1);
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+ if (!pent)
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+ warn(logopt,
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+ "map entry not updated: %s", me->mapent);
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+ else {
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+ if (me->mapent)
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+ free(me->mapent);
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+ me->mapent = strcpy(pent, mapent);
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+ warn(logopt,
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+ "map entry updated with: %s", mapent);
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+ }
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return CHE_DUPLICATE;
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+ }
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}
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ret = cache_update(mc, owner->source, key, mapent, age);
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--- autofs-5.0.7.orig/modules/parse_sun.c
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+++ autofs-5.0.7/modules/parse_sun.c
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@@ -804,10 +804,11 @@ update_offset_entry(struct autofs_point
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}
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ret = cache_update_offset(mc, name, m_key, m_mapent, age);
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- if (ret == CHE_DUPLICATE)
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+ if (ret == CHE_DUPLICATE) {
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warn(ap->logopt, MODPREFIX
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"syntax error or duplicate offset %s -> %s", path, loc);
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- else if (ret == CHE_FAIL)
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+ ret = CHE_OK;
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+ } else if (ret == CHE_FAIL)
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debug(ap->logopt, MODPREFIX
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"failed to update multi-mount offset %s -> %s", path, m_mapent);
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else {
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