gpg: Don't assume that strtoul interprets "" as 0.

* g10/tofu.c (show_statistics): If there are not records, return 0
instead of NULL.

--
Signed-off-by: Neal H. Walfield <neal@g10code.com>
GnuPG-bug-id: 2853

According to SUSv3:

  If the subject sequence is empty or does not have the expected form,
  no conversion is performed
  ...
  If no conversion could be performed, 0 is returned and errno may be
  set to [EINVAL].

  http://pubs.opengroup.org/onlinepubs/007908799/xsh/strtol.html

It appears that MacOS X sets errno to EINVAL, but glibc doesn't.
Hence, we map NULL to 0 explicitly.

(cherry picked from commit 407f5f9baea5591f148974240a87dfb43e5efef3)

Gbp-Pq: Name 0025-gpg-Don-t-assume-that-strtoul-interprets-as-0.patch

diff --git a/g10/tofu.c b/g10/tofu.c
index 85347bb74fccdc925e223df31af27d40ff4f5946..449e921b631380cf35fd6bf2b6acf2c59a72c8b4 100644 (file)
--- a/g10/tofu.c
+++ b/g10/tofu.c
@@ -2983,7 +2983,8 @@ show_statistics (tofu_dbs_t dbs,
   /* Get the signature stats.  */
   rc = gpgsql_exec_printf
     (dbs->db, strings_collect_cb, &strlist, &err,
-     "select count (*), min (signatures.time), max (signatures.time)\n"
+     "select count (*), coalesce (min (signatures.time), 0),\n"
+     "  coalesce (max (signatures.time), 0)\n"
      " from signatures\n"
      " left join bindings on signatures.binding = bindings.oid\n"
      " where fingerprint = %Q and email = %Q;",
@@ -3036,7 +3037,8 @@ show_statistics (tofu_dbs_t dbs,
   /* Get the encryption stats.  */
   rc = gpgsql_exec_printf
     (dbs->db, strings_collect_cb, &strlist, &err,
-     "select count (*), min (encryptions.time), max (encryptions.time)\n"
+     "select count (*), coalesce (min (encryptions.time), 0),\n"
+     "  coalesce (max (encryptions.time), 0)\n"
      " from encryptions\n"
      " left join bindings on encryptions.binding = bindings.oid\n"
      " where fingerprint = %Q and email = %Q;",