PATCH: Re: zsh: can't find terminal definition on vt100

["Bart Schaefer" <schaefer@xxxxxxxxxxxxxxxx>]

[I meant to respond to some of this stuff a while ago, but then started
having trouble with my ISP again, so I couldn't use my mail from home.]

On Feb 5,  1:01pm, rangarao.ragavendran@xxxxxxxxxx wrote:
}
} I am running zsh on HPUX 11.0 and when I execute
}      export TERM=vt100
} 
} I get the following error:
} 
} zsh: can't find terminal definition on vt100

The short answer was given on zsh-users a few weeks ago:

On Jan 22,  5:07pm, a normal guy wrote:
} Subject: Re: zsh 4.0.4 on HP-UX?
} 
} I fought this problem too, and the fix was similar.  In HP-UX
} 11.00, they redefined the output values of tgetent to 0 (OK) and
} -1 (ERR).  0 used to mean there was no such term capability.
} 
} The old tgetent is still available in the libHcurses library. 
} Putting LDFLAGS='-lHcurses' fixed the problem for me.
} 
} Scott

The long answer is that we need to change configure to detect this.
Here's a potential patch (against current 4.1.x from CVS, but I think
it'll apply to 4.0.4).  I don't have access to HP-UX 11 to test it,
but it works for the "normal" tgetent() on my RedHat Linux box.


Index: acconfig.h
===================================================================
diff -u -r1.8 acconfig.h
--- acconfig.h	2001/10/17 14:38:20	1.8
+++ acconfig.h	2002/02/12 16:36:41
@@ -187,6 +187,9 @@
 /* Define to 1 if tgetent() accepts NULL as a buffer */
 #undef TGETENT_ACCEPTS_NULL
 
+/* Define to 1 if tgetent() returns 0 on success (HP-UX X/Open curses) */
+#undef TGETENT_ZERO_SUCCESS
+
 /* Define to 1 if you use POSIX style signal handling */
 #undef POSIX_SIGNALS
 
Index: zshconfig.ac
===================================================================
diff -u -r1.11 zshconfig.ac
--- zshconfig.ac	2002/01/07 15:18:18	1.11
+++ zshconfig.ac	2002/02/12 16:34:38
@@ -963,14 +963,16 @@
 [AC_TRY_RUN([
 main()
 {
-    int i = tgetent((char*)0,"vt100");
-    if (i > 0) {
-	char tbuf[1024], *u;
-    	u = tbuf;
+    char buf[4096];
+    int r1 = tgetent(buf, "vt100");
+    int r2 = tgetent((char*)0,"vt100");
+    if (r1 >= 0 && r1 == r2) {
+        char tbuf[1024], *u;
+        u = tbuf;
     	tgetstr("cl", &u);
 	creat("conftest.tgetent", 0640);
     }
-    exit(!i || i == -1);
+    exit((r1 != r2) || r2 == -1);
 }
 ],
   if test -f conftest.tgetent; then
@@ -982,6 +984,33 @@
   zsh_cv_func_tgetent_accepts_null=no)])
 if test $zsh_cv_func_tgetent_accepts_null = yes; then
   AC_DEFINE(TGETENT_ACCEPTS_NULL)
+fi
+AC_CACHE_CHECK(if tgetent returns 0 on success,
+zsh_cv_func_tgetent_zero_success,
+[AC_TRY_RUN([
+main()
+{
+    char buf[4096];
+    int r1 = tgetent(buf, "!@#$%^&*");
+    int r2 = tgetent(buf, "vt100");
+    if (r1 < 0 && r2 == 0) {
+        char tbuf[1024], *u;
+        u = tbuf;
+    	tgetstr("cl", &u);
+	creat("conftest.tgetent0", 0640);
+    }
+    exit(r1 == r2);
+}
+],
+  if test -f conftest.tgetent0; then
+    zsh_cv_func_tgetent_zero_success=yes
+  else
+    zsh_cv_func_tgetent_zero_success=no
+  fi,
+  zsh_cv_func_tgetent_zero_success=no,
+  zsh_cv_func_tgetent_zero_success=no)])
+if test $zsh_cv_func_tgetent_zero_success = yes; then
+  AC_DEFINE(TGETENT_ZERO_SUCCESS)
 fi
 
 AC_FUNC_MMAP
Index: Src/init.c
===================================================================
diff -u -r1.7 Src/init.c
--- Src/init.c	2001/10/22 17:03:58	1.7
+++ Src/init.c	2002/02/12 16:40:47
@@ -535,11 +535,15 @@
 
 #ifdef TGETENT_ACCEPTS_NULL
     /* If possible, we let tgetent allocate its own termcap buffer */
-    if (tgetent(NULL, term) != 1) {
+# ifdef TGETENT_ZERO_SUCCESS
+    if (tgetent(NULL, term) != 0)
+# else
+    if (tgetent(NULL, term) != 1)
+# endif
 #else
-    if (tgetent(termbuf, term) != 1) {
+    if (tgetent(termbuf, term) != 1)
 #endif
-
+    {
 	if (isset(INTERACTIVE))
 	    zerr("can't find terminal definition for %s", term, 0);
 	errflag = 0;

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com

Zsh: http://www.zsh.org | PHPerl Project: http://phperl.sourceforge.net