[libvirt] [PATCH] maint: avoid C99 loop declaration

[Eric Blake]

Commit 3d0e3c1 reintroduced a problem previously squelched in
commit 7e5aa78.  Add a syntax check this time around.

util/virutil.c: In function 'virGetGroupList':
util/virutil.c:1015: error: 'for' loop initial declaration used outside C99 mode

* cfg.mk (sc_prohibit_loop_var_decl): New rule.
* src/util/virutil.c (virGetGroupList): Fix offender.

Signed-off-by: Eric Blake <eblake at redhat.com>
---

Pushing under the build-breaker rule.

 cfg.mk             | 12 +++++++++---
 src/util/virutil.c |  8 ++++----
 2 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/cfg.mk b/cfg.mk
index 13de268..791c393 100644
--- a/cfg.mk
+++ b/cfg.mk
@@ -546,15 +546,21 @@ sc_avoid_attribute_unused_in_header:
 	  $(_sc_search_regexp)

 sc_prohibit_int_ijk:
-	@prohibit='\<(int|unsigned) ([^(]* )*(i|j|k)(\s|,|;)'			\
+	@prohibit='\<(int|unsigned) ([^(]* )*(i|j|k)(\s|,|;)'		\
 	halt='use size_t, not int/unsigned int for loop vars i, j, k'	\
 	  $(_sc_search_regexp)

 sc_prohibit_loop_iijjkk:
-	@prohibit='\<(int|unsigned) ([^=]+ )*(ii|jj|kk)(\s|,|;)'				\
-	halt='use i, j, k for loop iterators, not ii, jj, kk' 			\
+	@prohibit='\<(int|unsigned) ([^=]+ )*(ii|jj|kk)(\s|,|;)'	\
+	halt='use i, j, k for loop iterators, not ii, jj, kk' 		\
 	  $(_sc_search_regexp)

+# RHEL 5 gcc can't grok "for (int i..."
+sc_prohibit_loop_var_decl:
+	@prohibit='\<for *\(\w+[ *]+\w+'				\
+	in_vc_files='\.[ch]$$'						\
+	halt='declare loop iterators outside the for statement'		\
+	  $(_sc_search_regexp)

 # Many of the function names below came from this filter:
 # git grep -B2 '\<_('|grep -E '\.c- *[[:alpha:]_][[:alnum:]_]* ?\(.*[,;]$' \
diff --git a/src/util/virutil.c b/src/util/virutil.c
index 3de72ea..34f5998 100644
--- a/src/util/virutil.c
+++ b/src/util/virutil.c
@@ -1010,18 +1010,18 @@ virGetGroupList(uid_t uid, gid_t gid, gid_t **list)
     }

     if (gid != (gid_t)-1) {
-        size_t n = ret;
+        size_t i;

-        for (size_t i = 0; i < ret; i++) {
+        for (i = 0; i < ret; i++) {
             if ((*list)[i] == gid)
                 goto cleanup;
         }
-        if (VIR_APPEND_ELEMENT(*list, n, gid) < 0) {
+        if (VIR_APPEND_ELEMENT(*list, i, gid) < 0) {
             ret = -1;
             VIR_FREE(*list);
             goto cleanup;
         } else {
-            ret = n;
+            ret = i;
         }
     }

-- 
1.8.3.1