Changed the GECOS-field '&' translation behavior to be controlled by the BSD42

[mmh] / zotnet / mts / mts.c

diff --git a/zotnet/mts/mts.c b/zotnet/mts/mts.c
index f53a8be..26e4807 100644 (file)
--- a/zotnet/mts/mts.c
+++ b/zotnet/mts/mts.c
@@ -5,6 +5,7 @@
  * $Id$
  */
 
+#include "h/mh.h"   /* for snprintf() */
 #include <h/nmh.h>
 
 #define nmhetcdir(file) NMHETCDIR#file
@@ -60,7 +61,7 @@ static char username[BUFSIZ];
 static char fullname[BUFSIZ];
 
 /* variables for username masquerading */
-static int MMailids = 0;
+int MMailids = 0;  /* used from post.c as well as here */
 static char *mmailid = "0";
 
 
@@ -374,7 +375,8 @@ getfullname (void)
 
 /*
  * Find the user's username and full name, and cache them.
- * It also handles mmailid processing (username masquerading)
+ * Also, handle "mmailid" username masquerading controlled from the GECOS field
+ * of the passwd file. 
  */
 
 static void
@@ -409,12 +411,20 @@ getuserinfo (void)
 
     /*
      * Do mmailid (username masquerading) processing.  The GECOS
-     * field should have the form "Full Name <fakeusername>".
+     * field should have the form "Full Name <fakeusername>".  For instance,
+     * "Dan Harkless <Dan.Harkless>".  Naturally, you'll want your MTA to have
+     * an alias (e.g. in /etc/aliases) from "fakeusername" to your account name.
      */
-#ifndef        GCOS_HACK
+#ifndef BSD42
     for (cp = fullname; *np && *np != (MMailids ? '<' : ','); *cp++ = *np++)
        continue;
-#else
+#else /* BSD42 */
+    /* On BSD(-derived) systems, the system utilities that deal with the GECOS
+       field (finger, mail, sendmail, etc.) translate any '&' character in it to
+       the login name, with the first letter capitalized.  So, for instance,
+       fingering a user "bob" with the GECOS field "& Jones" would reveal him to
+       be "In real life: Bob Jones".  Surprisingly, though, the OS doesn't do
+       the translation for you, so we have to do it manually here. */
     for (cp = fullname; *np && *np != (MMailids ? '<' : ','); ) {
        if (*np == '&') {       /* blech! */
            strcpy (cp, pw->pw_name);
@@ -426,7 +436,7 @@ getuserinfo (void)
            *cp++ = *np++;
        }
     }
-#endif
+#endif /* BSD42 */
 
     *cp = '\0';
     if (MMailids) {