--- Makefile
+++ Makefile	2005-10-14 13:44:09.000000000 +0000
@@ -11,13 +11,9 @@ BINDIR		= $(PREFIX)/bin
 MANDIR		= $(PREFIX)/share/man
 SYSCONFDIR	= /etc
 
-MAILRC		= $(SYSCONFDIR)/nail.rc
-MAILSPOOL	= /var/mail
-SENDMAIL	= /usr/lib/sendmail
-
 DESTDIR		=
 
-UCBINSTALL	= /usr/ucb/install
+UCBINSTALL	= install
 
 # Define compiler, preprocessor, and linker flags here.
 # Note that some Linux/glibc versions need -D_GNU_SOURCE in CPPFLAGS, or
@@ -50,7 +46,7 @@ SHELL		= /bin/sh
 
 # If you know that the IPv6 functions work on your machine, you can enable
 # them here.
-#IPv6		= -DHAVE_IPv6_FUNCS
+##IPv6		= -DHAVE_IPv6_FUNCS
 
 #
 # Binaries are stripped with this command after installation.
@@ -63,8 +59,7 @@ STRIP = strip
 ###########################################################################
 ###########################################################################
 
-FEATURES	= -DMAILRC='"$(MAILRC)"' -DMAILSPOOL='"$(MAILSPOOL)"' \
-			-DSENDMAIL='"$(SENDMAIL)"' $(IPv6)
+FEATURES	= $(IPv6)
 
 OBJ = aux.o base64.o cache.o cmd1.o cmd2.o cmd3.o cmdtab.o collect.o \
 	dotlock.o edit.o fio.o getname.o getopt.o head.o hmac.o \
--- cmd1.c
+++ cmd1.c	2005-10-14 13:44:09.000000000 +0000
@@ -78,7 +78,7 @@ get_pager(void)
 
 	cp = value("PAGER");
 	if (cp == NULL || *cp == '\0')
-		cp = value("bsdcompat") ? "more" : "pg";
+		cp = value("bsdcompat") ? PATH_MORE : PATH_PG;
 	return cp;
 }
 
@@ -757,7 +757,7 @@ type1(int *msgvec, int doign, int page,
 	if (pipe) {
 		cp = value("SHELL");
 		if (cp == NULL)
-			cp = SHELL;
+			cp = PATH_CSHELL;
 		obuf = Popen(cmd, "w", cp, 1);
 		if (obuf == NULL) {
 			perror(cmd);
--- cmd3.c
+++ cmd3.c	2005-10-14 13:44:09.000000000 +0000
@@ -90,7 +90,7 @@ shell(void *v)
 	if (bangexp(&cmd, &cmdsize) < 0)
 		return 1;
 	if ((shell = value("SHELL")) == NULL)
-		shell = SHELL;
+		shell = PATH_CSHELL;
 	run_command(shell, 0, -1, -1, "-c", cmd, NULL);
 	safe_signal(SIGINT, sigint);
 	printf("!\n");
@@ -109,7 +109,7 @@ dosh(void *v)
 	char *shell;
 
 	if ((shell = value("SHELL")) == NULL)
-		shell = SHELL;
+		shell = PATH_CSHELL;
 	run_command(shell, 0, -1, -1, NULL, NULL, NULL);
 	safe_signal(SIGINT, sigint);
 	putchar('\n');
--- collect.c
+++ collect.c	2005-10-14 13:44:09.000000000 +0000
@@ -121,7 +121,7 @@ insertcommand(FILE *fp, char *cmd)
 	if (sigsetjmp(pipejmp, 1))
 		goto endpipe;
 	if (cp == NULL)
-		cp = SHELL;
+		cp = PATH_CSHELL;
 	if ((obuf = Popen(cmd, "r", cp, 0)) == NULL) {
 		perror(cmd);
 		return;
@@ -1051,7 +1051,7 @@ mespipe(char *cmd)
 	 * stdout = new message.
 	 */
 	if ((shell = value("SHELL")) == NULL)
-		shell = SHELL;
+		shell = PATH_CSHELL;
 	if (run_command(shell,
 	    0, fileno(collf), fileno(nf), "-c", cmd, NULL) < 0) {
 		Fclose(nf);
--- def.h
+++ def.h	2005-10-14 13:45:56.000000000 +0000
@@ -642,3 +642,68 @@ enum ssl_vrfy_level {
 	VRFY_STRICT
 };
 #endif	/* USE_SSL */
+
+#include <paths.h>
+#ifndef PATH_MORE
+#  ifdef _PATH_MORE
+#    define PATH_MORE _PATH_MORE
+#  else
+#    define PATH_MORE "/usr/bin/more"
+#  endif
+#endif
+#ifndef PATH_PG
+#  ifdef _PATH_PG
+#    define PATH_PG _PATH_PG
+#  else
+#    define PATH_PG "/usr/bin/less"
+#  endif
+#endif
+#ifndef PATH_CSHELL
+#  ifdef _PATH_CSHELL
+#    define PATH_CSHELL _PATH_CSHELL
+#  else
+#    define PATH_CSHELL "/usr/bin/tcsh"
+#  endif
+#endif
+#ifndef PATH_MAILDIR
+#  ifdef _PATH_MAILDIR
+#    define PATH_MAILDIR _PATH_MAILDIR
+#  else
+#    define PATH_MAILDIR "/var/mail"
+#  endif
+#endif
+#ifndef PATH_EX
+#  ifdef _PATH_EX
+#    define PATH_EX _PATH_EX
+#  else
+#    define PATH_EX "/usr/bin/ex"
+#  endif
+#endif
+#ifndef PATH_VI
+#  ifdef _PATH_VI
+#    define PATH_VI _PATH_VI
+#  else
+#    define PATH_VI "/usr/bin/vi"
+#  endif
+#endif
+#ifndef PATH_MASTER_RC
+#  ifdef _PATH_MASTER_RC
+#    define PATH_MASTER_RC _PATH_MASTER_RC
+#  else
+#    define PATH_MASTER_RC "/etc/mail.rc"
+#  endif
+#endif
+#ifndef PATH_SENDMAIL
+#  ifdef _PATH_SENDMAIL
+#    define PATH_SENDMAIL _PATH_SENDMAIL
+#  else
+#    define PATH_SENDMAIL "/usr/sbin/sendmail"
+#  endif
+#endif
+#ifndef PATH_TMP
+#  ifdef _PATH_TMP
+#    define PATH_TMP _PATH_TMP
+#  else
+#    define PATH_TMP "/tmp"
+#  endif
+#endif
--- dotlock.c
+++ dotlock.c	2005-10-14 13:44:09.000000000 +0000
@@ -82,7 +82,7 @@ maildir_access(const char *fname)
 static int
 perhaps_setgid(const char *name, gid_t gid)
 {
-	char safepath[]= MAILSPOOL;
+	char safepath[]= PATH_MAILDIR;
 
 	if (strncmp(name, safepath, sizeof (safepath)-1) ||
 			strchr(name + sizeof (safepath), '/'))
--- edit.c
+++ edit.c	2005-10-14 13:47:03.000000000 +0000
@@ -153,7 +153,7 @@ edit1(int *msgvec, int type)
  * Run an editor on the file at "fpp" of "size" bytes,
  * and return a new file pointer.
  * Signals must be handled by the caller.
- * "Type" is 'e' for ed, 'v' for vi.
+ * "Type" is 'e' for PATH_EX, 'v' for PATH_VI.
  */
 FILE *
 run_editor(FILE *fp, off_t size, int type, int readonly,
@@ -212,7 +212,7 @@ run_editor(FILE *fp, off_t size, int typ
 	}
 	nf = NULL;
 	if ((edit = value(type == 'e' ? "EDITOR" : "VISUAL")) == NULL)
-		edit = type == 'e' ? "ed" : "vi";
+		edit = type == 'e' ? PATH_EX : PATH_VI;
 	sigemptyset(&set);
 	if (run_command(edit, oldint != SIG_IGN ? &set : NULL, -1, -1,
 				tempEdit, NULL, NULL) < 0) {
--- main.c
+++ main.c	2005-10-14 13:44:09.000000000 +0000
@@ -403,7 +403,7 @@ usage:
 	rcvmode = !to && !tflag;
 	spreserve();
 	if (!nosrc)
-		load(MAILRC);
+		load(PATH_MASTER_RC);
 	/*
 	 * Expand returns a savestr, but load only uses the file name
 	 * for fopen, so it's safe to do this.
--- names.c
+++ names.c	2005-10-14 13:44:09.000000000 +0000
@@ -343,7 +343,7 @@ outof(struct name *names, FILE *fo, stru
 			 * on one another.
 			 */
 			if ((shell = value("SHELL")) == NULL)
-				shell = SHELL;
+				shell = PATH_CSHELL;
 			sigemptyset(&nset);
 			sigaddset(&nset, SIGHUP);
 			sigaddset(&nset, SIGINT);
--- send.c
+++ send.c	2005-10-14 13:44:09.000000000 +0000
@@ -1088,7 +1088,7 @@ getpipefile(char *pipecmd, FILE **qbuf,
 			Ftfree(&tempPipe);
 		}
 		if ((shell = value("SHELL")) == NULL)
-			shell = SHELL;
+			shell = PATH_CSHELL;
 		if ((rbuf = Popen(pipecmd, "W", shell, fileno(*qbuf)))
 				== NULL) {
 			perror(pipecmd);
--- sendout.c
+++ sendout.c	2005-10-14 13:44:09.000000000 +0000
@@ -884,7 +884,7 @@ start_mta(struct name *to, struct name *
 			if ((cp = value("sendmail")) != NULL)
 				cp = expand(cp);
 			else
-				cp = SENDMAIL;
+				cp = PATH_SENDMAIL;
 			execv(cp, args);
 			perror(cp);
 		}
--- temp.c
+++ temp.c	2005-10-14 13:44:09.000000000 +0000
@@ -121,7 +121,7 @@ tinit(void)
 		tmpdir = smalloc(strlen(cp) + 1);
 		strcpy(tmpdir, cp);
 	} else {
-		tmpdir = "/tmp";
+		tmpdir = PATH_TMP;
 	}
 	if (myname != NULL) {
 		if (getuserid(myname) < 0) {
--- v7.local.c
+++ v7.local.c	2005-10-14 13:44:09.000000000 +0000
@@ -70,7 +70,7 @@ findmail(char *user, int force, char *bu
 			which_protocol(cp) == PROTO_IMAP) {
 		snprintf(buf, size, "%s/INBOX", protbase(cp));
 	} else if (force || (mbox = value("MAIL")) == NULL) {
-		snprintf(buf, size, "%s/%s", MAILSPOOL, user);
+		snprintf(buf, size, "%s/%s", PATH_MAILDIR, user);
 	} else {
 		strncpy(buf, mbox, size);
 		buf[size-1]='\0';