---
 system/linux |   10 ++++++++++
 config_f.h   |    9 +++++++--
 glob.h       |    3 ++-
 host.defs    |    9 +++------
 pathnames.h  |    2 +-
 sh.c         |    3 +++
 tc.alloc.c   |   10 ++++++----
 tc.func.c    |    8 ++++++--
 tc.str.c     |    2 +-
 tc.who.c     |    3 +++
 tcsh.man.in  |    2 +-
 tw.h         |    4 ++++
 12 files changed, 47 insertions(+), 18 deletions(-)

--- system/linux
+++ system/linux	2021-04-27 07:41:53.192829973 +0000
@@ -99,6 +99,9 @@
 #ifndef _SVID_SOURCE
 # define _SVID_SOURCE
 #endif
+#ifndef _DEFAULT_SOURCE
+# define _DEFAULT_SOURCE
+#endif
 #ifndef _POSIX_SOURCE
 # define _POSIX_SOURCE
 #endif
@@ -139,4 +142,11 @@
 # define POSIX
 #endif
 
+#if !defined(PW_SHADOW)
+# define PW_SHADOW
+#endif
+#if !defined(SuSE)
+# define SuSE
+#endif
+
 #endif /* _h_config */
--- config_f.h
+++ config_f.h	2021-04-27 07:41:53.192829973 +0000
@@ -72,7 +72,12 @@
 /*
  * LOGINFIRST   Source ~/.login before ~/.cshrc
  */
-#undef LOGINFIRST
+#define LOGINFIRST
+
+/*
+ * USERLOGINFIRST   Source ~/.login before ~/.cshrc
+ */
+#undef USERLOGINFIRST
 
 /*
  * VIDEFAULT    Make the VI mode editor the default
@@ -166,7 +171,7 @@
  *		successful, set $REMOTEHOST to the name or address of the
  *		host
  */
-#define REMOTEHOST
+#undef REMOTEHOST
 
 /*
  * COLOR_LS_F Do you want to use builtin color ls-F ?
--- glob.h
+++ glob.h	2021-04-27 07:41:53.192829973 +0000
@@ -72,6 +72,7 @@ typedef struct {
 #define	GLOB_NOSYS	(-4)	/* Implementation does not support function. */
 
 /* #if !defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) */
+#if (!defined _POSIX_C_SOURCE || _POSIX_C_SOURCE < 2 || defined _BSD_SOURCE || defined _GNU_SOURCE)
 #define	GLOB_ALTDIRFUNC	0x0040	/* Use alternately specified directory funcs. */
 #define	GLOB_BRACE	0x0080	/* Expand braces ala csh. */
 #define	GLOB_MAGCHAR	0x0100	/* Pattern had globbing characters. */
@@ -84,7 +85,7 @@ typedef struct {
 #define	GLOB_DOT	0x8000	/* don't skip dotfiles (except . and ..) */
 
 #define	GLOB_ABEND	GLOB_ABORTED	/* source compatibility */
-/* #endif */
+#endif
 
 int	glob (const char *, int, int (*)(const char *, int), glob_t *);
 void	globfree (glob_t *);
--- host.defs
+++ host.defs	2021-05-28 09:44:03.337584826 +0000
@@ -189,9 +189,8 @@ static void populate(void)
 #endif
 	}
 	xsnprintf(ostype, sizeof(ostype), "%s", p);
-	xsnprintf(mach, sizeof(mach), "%s", e != -1 ? uts.machine : "unknown");
-	xsnprintf(host, sizeof(host), "%s-%s",
-	    e != -1 ? uts.machine : "unknown", ostype);
+	xsnprintf(mach, sizeof(mach), "%s-suse-linux", e != -1 ? uts.machine : "unknown");
+	xsnprintf(host, sizeof(host), "%s", e != -1 ? uts.machine : "unknown");
 }
 
 static char *
@@ -1275,9 +1274,7 @@ newcode :
 #ifndef _ostype_
     ostype = "unknown";
 #endif
-#ifndef _vendor_
-    vendor = "unknown";
-#endif
+    vendor = "suse";
 #ifndef _machtype_
     machtype = "unknown";
 #endif
--- pathnames.h
+++ pathnames.h	2021-04-27 07:41:53.192829973 +0000
@@ -83,7 +83,7 @@
 # endif /* !_PATH_DOTLOGIN */
 #endif /* sgi || OREO || cray || AMIX || CDC */
 
-#if (defined(_CRAYCOM) || defined(Lynx)) && !defined(_PATH_TCSHELL)
+#if (defined(_CRAYCOM) || defined(Lynx) || defined(linux)) && !defined(_PATH_TCSHELL)
 # define _PATH_TCSHELL		"/bin/tcsh"		/* 1st class shell */
 #endif /* _CRAYCOM && !_PATH_TCSHELL */
 
--- sh.c
+++ sh.c	2021-04-27 07:41:53.192829973 +0000
@@ -1346,6 +1346,9 @@ main(int argc, char **argv)
 	    setintr = osetintr;
 	    parintr = oparintr;
 	}
+#ifndef USERLOGINFIRST
+# undef LOGINFIRST
+#endif
 #ifdef LOGINFIRST
 	if (loginsh)
 	    (void) srccat(varval(STRhome), STRsldotlogin);
--- tc.alloc.c
+++ tc.alloc.c	2021-04-27 07:41:53.192829973 +0000
@@ -518,7 +518,7 @@ smalloc(size_t n)
 {
     ptr_t   ptr;
 
-    n = n ? n : 1;
+    n = n ? n+1 : 1;
 
 #ifdef USE_SBRK
     if (membot == NULL)
@@ -541,7 +541,7 @@ srealloc(ptr_t p, size_t n)
 {
     ptr_t   ptr;
 
-    n = n ? n : 1;
+    n = n ? n+1 : 1;
 
 #ifdef USE_SBRK
     if (membot == NULL)
@@ -565,7 +565,7 @@ scalloc(size_t s, size_t n)
     ptr_t   ptr;
 
     n *= s;
-    n = n ? n : 1;
+    n = n ? n+1 : 1;
 
 #ifdef USE_SBRK
     if (membot == NULL)
@@ -590,8 +590,10 @@ scalloc(size_t s, size_t n)
 void
 sfree(ptr_t p)
 {
-    if (p && !dont_free)
+    if (p && !dont_free) {
 	free(p);
+	p = (ptr_t)NULL;
+    }
 }
 
 #endif /* SYSMALLOC */
--- tc.func.c
+++ tc.func.c	2021-04-27 07:41:53.196829900 +0000
@@ -739,9 +739,13 @@ auto_lock(void)
 	    handle_pending_signals();
 	    errno = 0;
 	}
-	if (spw != NULL)			 /* shadowed passwd	  */
+	if (spw != NULL)			/* shadowed passwd	  */
 	    srpp = spw->sp_pwdp;
+	else
+	    srpp = pw->pw_passwd;		/* nis extended passwd?  */
     }
+    endspent();
+    endpwent();
 
 #else
 
@@ -1957,7 +1961,7 @@ getremotehost(int dest_fd)
 	     * have not caught up yet.
 	     */
 	    addr.s_addr = inet_addr(name);
-	    if (addr.s_addr != (unsigned int)~0)
+	    if (addr.s_addr != ~0U)
 		host = name;
 	    else {
 		if (sptr != name) {
--- tc.str.c
+++ tc.str.c	2021-04-27 07:41:53.196829900 +0000
@@ -347,7 +347,7 @@ s_strlen(const Char *str)
 {
     size_t n;
 
-    for (n = 0; *str++; n++)
+    for (n = 0; str && *str; n++, str++)
 	continue;
     return (n);
 }
--- tc.who.c
+++ tc.who.c	2021-04-27 07:41:53.196829900 +0000
@@ -259,6 +259,9 @@ watch_login(int force)
     }
     stlast = sta.st_mtime;
 #if defined(HAVE_GETUTENT) || defined(HAVE_GETUTXENT)
+# ifndef HAVE_UTMPX_H
+    utmpname( _PATH_UTMP );
+# endif
     setutent();
 #else
     if ((utmpfd = xopen(TCSH_PATH_UTMP, O_RDONLY|O_LARGEFILE)) < 0) {
--- tcsh.man.in
+++ tcsh.man.in	2021-04-27 07:41:53.196829900 +0000
@@ -1001,7 +1001,7 @@ much like
 .Ic history-search-backward
 does.
 .
-.It Ic delete-char No (not bound)
+.It Ic delete-char \fR(bound to `Del' if using the standard \fI/etc/csh.cshrc\fR)
 Deletes the character under the cursor.
 See also
 .Ic delete-char-or-list-or-eof .
--- tw.h
+++ tw.h	2021-04-27 07:41:53.196829900 +0000
@@ -32,6 +32,10 @@
 #ifndef _h_tw
 #define _h_tw
 
+#ifndef _h_sh
+# include "sh.h"
+#endif
+
 #define TW_PATH		0x1000
 #define TW_ZERO		0x0fff