common: Fix gnupg_wait_processes.

* common/exechelp-posix.c (gnupg_wait_processes): Loop for r_exitcodes
even if we already see an error.

--

Cherry-picked master commit of:
	eeb3da6eb717ed6a1a1069a7611eb37503e8672d

The value stored by waitpid for exit code is encoded;  It requires
decoded by WEXITSTATUS macro, regardless of an error.

For example, when one of processes is already exited and another is
still running, it resulted wrong value of in r_exitcodes[n].

Signed-off-by: NIIBE Yutaka <[email protected]>

1 files changed, 26 insertions, 24 deletions

diff --git a/common/exechelp-posix.c b/common/exechelp-posix.c
index 7237993a2..3acf74ad6 100644
--- a/common/exechelp-posix.c
+++ b/common/exechelp-posix.c
@@ -784,30 +784,32 @@ gnupg_wait_processes (const char **pgmnames, pid_t *pids, size_t count,
         }
     }
 
-  if (ec == 0)
-    for (i = 0; i < count; i++)
-      {
-        if (WIFEXITED (r_exitcodes[i]) && WEXITSTATUS (r_exitcodes[i]) == 127)
-          {
-            log_error (_("error running '%s': probably not installed\n"),
-                       pgmnames[i]);
-            ec = GPG_ERR_CONFIGURATION;
-          }
-        else if (WIFEXITED (r_exitcodes[i]) && WEXITSTATUS (r_exitcodes[i]))
-          {
-            if (dummy)
-              log_error (_("error running '%s': exit status %d\n"),
-                         pgmnames[i], WEXITSTATUS (r_exitcodes[i]));
-            else
-              r_exitcodes[i] = WEXITSTATUS (r_exitcodes[i]);
-            ec = GPG_ERR_GENERAL;
-          }
-        else if (!WIFEXITED (r_exitcodes[i]))
-          {
-            log_error (_("error running '%s': terminated\n"), pgmnames[i]);
-            ec = GPG_ERR_GENERAL;
-          }
-      }
+  for (i = 0; i < count; i++)
+    {
+      if (r_exitcodes[i] == -1)
+        continue;
+
+      if (WIFEXITED (r_exitcodes[i]) && WEXITSTATUS (r_exitcodes[i]) == 127)
+        {
+          log_error (_("error running '%s': probably not installed\n"),
+                     pgmnames[i]);
+          ec = GPG_ERR_CONFIGURATION;
+        }
+      else if (WIFEXITED (r_exitcodes[i]) && WEXITSTATUS (r_exitcodes[i]))
+        {
+          if (dummy)
+            log_error (_("error running '%s': exit status %d\n"),
+                       pgmnames[i], WEXITSTATUS (r_exitcodes[i]));
+          else
+            r_exitcodes[i] = WEXITSTATUS (r_exitcodes[i]);
+          ec = GPG_ERR_GENERAL;
+        }
+      else if (!WIFEXITED (r_exitcodes[i]))
+        {
+          log_error (_("error running '%s': terminated\n"), pgmnames[i]);
+          ec = GPG_ERR_GENERAL;
+        }
+    }
 
   xfree (dummy);
   return gpg_err_make (GPG_ERR_SOURCE_DEFAULT, ec);