From 7e2b7bb44c4996c425a93f6aacf151480cd08595 Mon Sep 17 00:00:00 2001

From: Robbie Harwood <rharwood@redhat.com>

Date: Tue, 10 Apr 2018 15:55:41 -0400

Subject: [PATCH] Merge duplicate subsections in profile library

Modify profile_add_node() to return the existing node, rather than

making a new one, when adding subsection configuration.

This fixes an issue where the first instance of a subsection will hide

the second instance entirely.  In particular, it was previously

impossible to split realm-specific configuration across multiple

config files.

[ghudson@mit.edu: adjusted style, added test case]

(cherry picked from commit efab9fa5a6d23c486467264e20b58bf5a9c60f0c)

ticket: 7863

version_fixed: 1.16.1

(cherry picked from commit 98d0061c8083af960438ad1ac088f60497694a68)

---

 src/util/profile/prof_test1  | 22 ++++++++++++++++++++++

 src/util/profile/prof_tree.c | 15 +++++++++++----

 src/util/profile/test.ini    |  6 ++++++

 3 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/src/util/profile/prof_test1 b/src/util/profile/prof_test1

index 7e30fc12f..7d13c9389 100644

--- a/src/util/profile/prof_test1

+++ b/src/util/profile/prof_test1

@@ -341,6 +341,27 @@ proc test9 {} {

     puts "OK: test9: profile_flush_to_file with no changes"

 }

+proc test10 {} {

+    global wd verbose

+

+    # Regression test for #7863: multiply-specified subsections should

+    # be merged.

+    set p [profile_init_path $wd/test2.ini]

+    set x [profile_get_values $p {{test section 2} child_section2 child}]

+    if $verbose { puts "Read $x from profile" }

+    if ![string equal $x "slick harry {john\tb } ron"] {

+	puts stderr "Error: test10: Did not get expected merged children."

+	exit 1

+    }

+

+    set x [profile_get_string $p {test section 2} child_section2 chores]

+    if $verbose { puts "Read $x from profile" }

+    if ![string equal $x "cleaning"] {

+	puts stderr "Error: test10: Did not find expected chores."

+	exit 1

+    }

+}

+

 test1

 test2

 test3

@@ -350,5 +371,6 @@ test6

 test7

 test8

 test9

+test10

 exit 0

diff --git a/src/util/profile/prof_tree.c b/src/util/profile/prof_tree.c

index 081f688e4..38aadc4e5 100644

--- a/src/util/profile/prof_tree.c

+++ b/src/util/profile/prof_tree.c

@@ -9,7 +9,7 @@

  *

  * Each node may represent either a relation or a section header.

  *

- * A section header must have its value field set to 0, and may a one

+ * A section header must have its value field be null, and may have one

  * or more child nodes, pointed to by first_child.

  *

  * A relation has as its value a pointer to allocated memory

@@ -159,15 +159,22 @@ errcode_t profile_add_node(struct profile_node *section, const char *name,

         return PROF_ADD_NOT_SECTION;

     /*

-     * Find the place to insert the new node.  We look for the

-     * place *after* the last match of the node name, since

+     * Find the place to insert the new node.  If we are adding a subsection

+     * and already have a subsection with that name, merge them.  Otherwise,

+     * we look for the place *after* the last match of the node name, since

      * order matters.

      */

     for (p=section->first_child, last = 0; p; last = p, p = p->next) {

         int cmp;

         cmp = strcmp(p->name, name);

-        if (cmp > 0)

+        if (cmp > 0) {

             break;

+        } else if (value == NULL && cmp == 0 &&

+                   p->value == NULL && p->deleted != 1) {

+            /* Found duplicate subsection, so don't make a new one. */

+            *ret_node = p;

+            return 0;

+        }

     }

     retval = profile_create_node(name, value, &new;;

     if (retval)

diff --git a/src/util/profile/test.ini b/src/util/profile/test.ini

index 23ca89677..6622df108 100644

--- a/src/util/profile/test.ini

+++ b/src/util/profile/test.ini

@@ -10,6 +10,12 @@ this is a comment.  Everything up to the first square brace is ignored.

 	}

 	child_section2 = foo

+[test section 2]

+	child_section2 = {

+		child = ron

+		chores = cleaning

+	}

+

 [realms]

 ATHENA.MIT.EDU = {

 	server = KERBEROS.MIT.EDU:88