Patch to add DOI numbers to conference articles without pages in IEEEtranN.bst

gistfile1.diff

--- /usr/share/texmf-dist/bibtex/bst/IEEEtran/IEEEtranN.bst	2008-09-30 19:18:36.000000000 -0400
+++ IEEEtranNdoi.bst	2012-08-16 16:41:34.000000000 -0400
@@ -146,6 +146,10 @@
 FUNCTION {default.name.latex.cmd}{ "" }
 
 
+% The default DOI prefix.
+FUNCTION {default.name.doi.prefix}{ "" }
+
+
 % The default URL prefix.
 FUNCTION {default.name.url.prefix}{ "[Online]. Available:" }
 
@@ -274,6 +278,7 @@
     chapter
     day
     dayfiled
+    doi
     edition
     editor
     howpublished
@@ -310,6 +315,7 @@
     CTLdash_repeated_names
     CTLname_format_string
     CTLname_latex_cmd
+    CTLname_doi_prefix
     CTLname_url_prefix
   }
   {}
@@ -356,6 +362,7 @@
           ALTinterwordstretchfactor
           name.format.string
           name.latex.cmd
+          name.doi.prefix
           name.url.prefix}
 
 
@@ -376,6 +383,7 @@
   default.ALTinterwordstretchfactor 'ALTinterwordstretchfactor :=
   default.name.format.string 'name.format.string :=
   default.name.latex.cmd 'name.latex.cmd :=
+  default.name.doi.prefix 'name.doi.prefix :=
   default.name.url.prefix 'name.url.prefix :=
 }
 
@@ -767,8 +775,8 @@
 
 FUNCTION {empty.entry.warn}
 { author empty$ title empty$ howpublished empty$
-  month empty$ year empty$ note empty$ url empty$
-  and and and and and and
+  month empty$ year empty$ note empty$ doi empty$ url empty$
+  and and and and and and and
     { "all relevant fields are empty in " cite$ * warning$ }
     'skip$
   if$
@@ -1135,6 +1143,8 @@
   write$ newline$
   "\providecommand{\natexlab}[1]{#1}"
   write$ newline$
+  "\providecommand{\doi}[1]{DOI:#1}"
+  write$ newline$
   "\providecommand{\url}[1]{#1}"
   write$ newline$
   "\csname url@samestyle\endcsname"
@@ -1958,6 +1968,27 @@
 
 
 
+%% DOI
+
+FUNCTION {format.doi}
+{ doi empty$
+    { "" }
+    { this.to.prev.status
+      this.status.std
+      cap.yes 'status.cap :=
+      name.doi.prefix " " *
+      "\doi{" * doi * "}" *
+      punct.no 'this.status.punct :=
+      punct.period 'prev.status.punct :=
+      space.normal 'this.status.space :=
+      space.normal 'prev.status.space :=
+      quote.no 'this.status.quote :=
+    }
+  if$
+}
+
+
+
 %% URL
 
 FUNCTION {format.url}
@@ -2130,6 +2161,10 @@
   format.pages output
   format.note output
   format.url output
+  pages empty$
+    { format.doi output }
+    {}
+  if$
   fin.entry
   if.url.std.interword.spacing
 }
@@ -2256,6 +2291,10 @@
   if$
   format.note output
   format.url output
+  pages empty$
+    { format.doi output }
+    {}
+  if$
   fin.entry
   if.url.std.interword.spacing
 }
@@ -2399,6 +2438,13 @@
       'name.latex.cmd :=
     }
   if$
+  CTLname_doi_prefix
+  missing$
+    { skip$ }
+    { CTLname_doi_prefix
+      'name.doi.prefix :=
+    }
+  if$
   CTLname_url_prefix
   missing$
     { skip$ }

There appears to be a bug on https://gist.github.com/ezod/3373556#file-gistfile1-diff-L99 and https://gist.github.com/ezod/3373556#file-gistfile1-diff-L110. With this patch (manually) applied to IEEEtranS.bst, and these lines copied to other entry handles too, I was getting no DOIs for articles, conference papers and other entries, except for a few books and theses. Replacing:

pages empty$
    { format.doi output }
    {}
  if$

with format.doi output, as in this modified version of IEEEtran.bst solves the problem.