From b1f4c1e6649ca937b9c8a3d926303f060b32f27f Mon Sep 17 00:00:00 2001
From: Michael R Sweet <michael.r.sweet@gmail.com>
Date: Mon, 18 Nov 2019 13:20:34 -0500
Subject: Refactor the defaults code so that the correct order of precedence is
 respected in all cases (Issue #5683)

---
 cups/dest.c | 58 +++++++++++++++++++++++++++++++---------------------------
 1 file changed, 31 insertions(+), 27 deletions(-)

(limited to 'cups')

diff --git a/cups/dest.c b/cups/dest.c
index fd57d9794..cde987a09 100644
--- a/cups/dest.c
+++ b/cups/dest.c
@@ -2256,7 +2256,7 @@ _cupsUserDefault(char   *name,		/* I - Name buffer */
   * system preferences...
   */
 
-  if ((locprinter = _cupsAppleCopyDefaultPrinter()) != NULL)
+  if (!getenv("CUPS_NO_APPLE_DEFAULT") && (locprinter = _cupsAppleCopyDefaultPrinter()) != NULL)
   {
     CFStringGetCString(locprinter, name, (CFIndex)namesize, kCFStringEncodingUTF8);
     CFRelease(locprinter);
@@ -3379,10 +3379,9 @@ cups_enum_dests(
   int           i, j,			/* Looping vars */
                 num_dests;              /* Number of destinations */
   cups_dest_t   *dests = NULL,          /* Destinations */
-                *dest,                  /* Current destination */
-                *user_dest;		/* User destination */
+                *dest;			/* Current destination */
   cups_option_t	*option;		/* Current option */
-  char          *user_default;          /* User default printer */
+  const char	*user_default;		/* Default printer from environment */
 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
   int           count,                  /* Number of queries started */
                 completed,              /* Number of completed queries */
@@ -3437,47 +3436,49 @@ cups_enum_dests(
 
   memset(&data, 0, sizeof(data));
 
-  if ((user_default = _cupsUserDefault(data.def_name, sizeof(data.def_name))) == NULL)
+  user_default = _cupsUserDefault(data.def_name, sizeof(data.def_name));
+
+  snprintf(filename, sizeof(filename), "%s/lpoptions", cg->cups_serverroot);
+  data.num_dests = cups_get_dests(filename, NULL, NULL, 1, user_default != NULL, data.num_dests, &data.dests);
+
+  if (cg->home)
   {
-    const char *defprinter = cupsGetDefault2(http);
-					/* Server default, if any */
+    snprintf(filename, sizeof(filename), "%s/.cups/lpoptions", cg->home);
 
-    if (defprinter)
-      strlcpy(data.def_name, defprinter, sizeof(data.def_name));
+    data.num_dests = cups_get_dests(filename, NULL, NULL, 1, user_default != NULL, data.num_dests, &data.dests);
   }
 
-  if (data.def_name[0])
+  if (!user_default && (dest = cupsGetDest(NULL, NULL, data.num_dests, data.dests)) != NULL)
   {
    /*
-    * Separate printer and instance name...
+    * Use an lpoptions default printer...
     */
 
-    if ((data.def_instance = strchr(data.def_name, '/')) != NULL)
-      *data.def_instance++ = '\0';
+    if (dest->instance)
+      snprintf(data.def_name, sizeof(data.def_name), "%s/%s", dest->name, dest->instance);
+    else
+      strlcpy(data.def_name, dest->name, sizeof(data.def_name));
   }
-
-  DEBUG_printf(("1cups_enum_dests: def_name=\"%s\", def_instance=\"%s\"", data.def_name, data.def_instance));
-
-  snprintf(filename, sizeof(filename), "%s/lpoptions", cg->cups_serverroot);
-  data.num_dests = cups_get_dests(filename, NULL, NULL, 1, user_default != NULL, data.num_dests, &data.dests);
-
-  if (cg->home)
+  else
   {
-    snprintf(filename, sizeof(filename), "%s/.cups/lpoptions", cg->home);
+    const char	*default_printer;	/* Server default printer */
 
-    data.num_dests = cups_get_dests(filename, NULL, NULL, 1, user_default != NULL, data.num_dests, &data.dests);
+    if ((default_printer = cupsGetDefault2(http)) != NULL)
+      strlcpy(data.def_name, default_printer, sizeof(data.def_name));
   }
 
-  if (!data.def_name[0] && (user_dest = cupsGetDest(NULL, NULL, data.num_dests, data.dests)) != NULL)
+  if (data.def_name[0])
   {
    /*
-    * Use an lpoptions default printer...
+    * Separate printer and instance name...
     */
 
-    strlcpy(data.def_name, user_dest->name, sizeof(data.def_name));
-    data.def_instance = user_dest->instance;
+    if ((data.def_instance = strchr(data.def_name, '/')) != NULL)
+      *data.def_instance++ = '\0';
   }
 
+  DEBUG_printf(("1cups_enum_dests: def_name=\"%s\", def_instance=\"%s\"", data.def_name, data.def_instance));
+
  /*
   * Get ready to enumerate...
   */
@@ -3515,8 +3516,9 @@ cups_enum_dests(
          i > 0 && (!cancel || !*cancel);
          i --, dest ++)
     {
+      cups_dest_t	*user_dest;	/* Destination from lpoptions */
 #if defined(HAVE_DNSSD) || defined(HAVE_AVAHI)
-      const char *device_uri;    /* Device URI */
+      const char	*device_uri;	/* Device URI */
 #endif /* HAVE_DNSSD || HAVE_AVAHI */
 
       if ((user_dest = cupsGetDest(dest->name, dest->instance, data.num_dests, data.dests)) != NULL)
@@ -3785,6 +3787,8 @@ cups_enum_dests(
 
         if ((device->type & mask) == type)
         {
+          cups_dest_t	*user_dest;	/* Destination from lpoptions */
+
           dest = &device->dest;
 
 	  if ((user_dest = cupsGetDest(dest->name, dest->instance, data.num_dests, data.dests)) != NULL)
-- 
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