[PULL 01/17] linux-user, bsd-user: Preserve incoming order of environment variables in the target

[Philippe Mathieu-Daudé]

From: Andreas Schwab <schwab@suse.de>

Do not reverse the order of environment variables in the target environ
array relative to the incoming environ order.  Some testsuites depend on a
specific order, even though it is not defined by any standard.

Signed-off-by: Andreas Schwab <schwab@suse.de>
Reviewed-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <mvmlejfsivd.fsf@suse.de>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 bsd-user/main.c   | 10 +++++++++-
 linux-user/main.c | 10 +++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/bsd-user/main.c b/bsd-user/main.c
index cd8b2a670f..b597328118 100644
--- a/bsd-user/main.c
+++ b/bsd-user/main.c
@@ -295,8 +295,16 @@ int main(int argc, char **argv)
 
     envlist = envlist_create();
 
-    /* add current environment into the list */
+    /*
+     * add current environment into the list
+     * envlist_setenv adds to the front of the list; to preserve environ
+     * order add from back to front
+     */
     for (wrk = environ; *wrk != NULL; wrk++) {
+        continue;
+    }
+    while (wrk != environ) {
+        wrk--;
         (void) envlist_setenv(envlist, *wrk);
     }
 
diff --git a/linux-user/main.c b/linux-user/main.c
index 5e6b2e1714..dba67ffa36 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -692,8 +692,16 @@ int main(int argc, char **argv, char **envp)
 
     envlist = envlist_create();
 
-    /* add current environment into the list */
+    /*
+     * add current environment into the list
+     * envlist_setenv adds to the front of the list; to preserve environ
+     * order add from back to front
+     */
     for (wrk = environ; *wrk != NULL; wrk++) {
+        continue;
+    }
+    while (wrk != environ) {
+        wrk--;
         (void) envlist_setenv(envlist, *wrk);
     }
 
-- 
2.38.1