+# define HASINITGROUPS 1 /* has initgroups(3) call */
+# define HASFLOCK 1 /* has flock(2) call */
+# define NEEDGETOPT 1 /* need a replacement for getopt(3) */
+# define HASSTATFS 1 /* has the statfs(2) syscall */
+# define WAITUNION 1 /* use "union wait" as wait argument type */
+# define sleep sleepX
+# define setpgid setpgrp
+# ifndef LA_TYPE
+# define LA_TYPE LA_MACH
+# endif
+# ifndef _POSIX_SOURCE
+typedef int pid_t;
+# undef WEXITSTATUS
+# undef WIFEXITED
+# endif
+# ifndef _PATH_SENDMAILCF
+# define _PATH_SENDMAILCF "/etc/sendmail/sendmail.cf"
+# endif
+# ifndef _PATH_SENDMAILPID
+# define _PATH_SENDMAILPID "/etc/sendmail/sendmail.pid"
+# endif
+#endif
+
+
+/*
+** 4.4 BSD
+**
+** See also BSD defines.
+*/
+
+#ifdef BSD4_4
+# define HASUNSETENV 1 /* has unsetenv(3) call */
+# define HASSTATFS 1 /* has the statfs(2) syscall */
+# include <sys/cdefs.h>
+# define ERRLIST_PREDEFINED /* don't declare sys_errlist */
+# ifndef LA_TYPE
+# define LA_TYPE LA_SUBR
+# endif
+#endif
+
+
+/*
+** 386BSD / FreeBSD 1.0E / NetBSD (all architectures, all versions)
+**
+** 4.3BSD clone, closer to 4.4BSD
+**
+** See also BSD defines.
+*/
+
+#if defined(__386BSD__) || defined(__FreeBSD__) || defined(__NetBSD__)
+# define HASUNSETENV 1 /* has unsetenv(3) call */
+# define HASSETSID 1 /* has the setsid(2) POSIX syscall */
+# define HASSTATFS 1 /* has the statfs(2) syscall */
+# include <sys/cdefs.h>
+# define ERRLIST_PREDEFINED /* don't declare sys_errlist */
+# ifndef LA_TYPE
+# define LA_TYPE LA_SUBR
+# endif
+#endif
+
+
+/*
+** Mach386
+**
+** For mt Xinu's Mach386 system.
+*/
+
+#if defined(MACH) && defined(i386)
+# define MACH386 1
+# define HASUNSETENV 1 /* has unsetenv(3) call */
+# define HASINITGROUPS 1 /* has initgroups(3) call */
+# define HASFLOCK 1 /* has flock(2) call */
+# define HASSTATFS 1 /* has the statfs(2) syscall */
+# define NEEDGETOPT 1 /* need a replacement for getopt(3) */
+# define NEEDSTRTOL 1 /* need the strtol() function */
+# define setpgid setpgrp
+# ifndef LA_TYPE
+# define LA_TYPE LA_FLOAT
+# endif
+# undef HASSETVBUF /* don't actually have setvbuf(3) */
+# undef WEXITSTATUS
+# undef WIFEXITED
+# ifndef _PATH_SENDMAILCF
+# define _PATH_SENDMAILCF "/usr/lib/sendmail.cf"
+# endif
+# ifndef _PATH_SENDMAILPID
+# define _PATH_SENDMAILPID "/etc/sendmail.pid"
+# endif
+#endif
+
+
+/*
+** 4.3 BSD -- this is for very old systems
+**
+** You'll also have to install a new resolver library.
+** I don't guarantee that support for this environment is complete.
+*/
+
+#ifdef oldBSD43
+# define NEEDVPRINTF 1 /* need a replacement for vprintf(3) */
+# define NEEDGETOPT 1 /* need a replacement for getopt(3) */
+# define ARBPTR_T char *
+# define setpgid setpgrp
+# ifndef LA_TYPE
+# define LA_TYPE LA_FLOAT
+# endif
+# ifndef _PATH_SENDMAILCF
+# define _PATH_SENDMAILCF "/usr/lib/sendmail.cf"
+# endif
+# ifndef IDENTPROTO
+# define IDENTPROTO 0 /* TCP/IP implementation is broken */
+# endif
+# undef WEXITSTATUS
+# undef WIFEXITED
+typedef short pid_t;
+extern int errno;
+#endif
+
+
+/*
+** SCO Unix
+**
+** This includes two parts -- the first is for SCO Open Server 3.2v4
+** (contributed by Philippe Brand <phb@colombo.telesys-innov.fr>).
+** The second is, I believe, for an older version.
+*/
+
+#ifdef _SCO_unix_4_2
+# define _SCO_unix_
+# define HASSETREUID 1 /* has setreuid(2) call */
+# define _PATH_UNIX "/unix"
+# ifndef _PATH_SENDMAILCF
+# define _PATH_SENDMAILCF "/usr/lib/sendmail.cf"
+# endif
+# ifndef _PATH_SENDMAILPID
+# define _PATH_SENDMAILPID "/etc/sendmail.pid"
+# endif
+#endif
+
+#ifdef _SCO_unix_
+# define SYSTEM5 1 /* include all the System V defines */
+# define SYS5SIGNALS 1 /* SysV signal semantics -- reset on each sig */
+# define HASSTATFS 1 /* has the statfs(2) syscall */
+# define HASGETUSERSHELL 0 /* does not have getusershell(3) call */
+# define FORK fork
+# define MAXPATHLEN PATHSIZE
+# define LA_TYPE LA_SHORT
+# undef NETUNIX /* no unix domain socket support */
+#endif
+
+
+/*
+** ConvexOS 11.0 and later
+*/
+
+#ifdef _CONVEX_SOURCE
+# define BSD 1 /* include all the BSD defines */
+# define HASUNAME 1 /* use System V uname(2) system call */
+# define HASSTATFS 1 /* has the statfs(2) syscall */
+# define HASSETSID 1 /* has POSIX setsid(2) call */
+# define NEEDGETOPT 1 /* need replacement for getopt(3) */
+# define LA_TYPE LA_FLOAT
+# ifndef IDENTPROTO
+# define IDENTPROTO 0 /* TCP/IP implementation is broken */
+# endif
+#endif
+
+
+/*
+** RISC/os 4.52
+**
+** Gives a ton of warning messages, but otherwise compiles.
+*/
+
+#ifdef RISCOS
+
+# define HASUNSETENV 1 /* has unsetenv(3) call */
+# define HASFLOCK 1 /* has flock(2) call */
+# define WAITUNION 1 /* use "union wait" as wait argument type */
+# define NEEDGETOPT 1 /* need a replacement for getopt(3) */
+# define LA_TYPE LA_INT
+# define LA_AVENRUN "avenrun"
+# define _PATH_UNIX "/unix"
+# undef WIFEXITED
+
+# define setpgid setpgrp
+
+extern int errno;
+typedef int pid_t;
+#define SIGFUNC_DEFINED
+typedef int (*sigfunc_t)();
+extern char *getenv();
+extern void *malloc();
+
+#endif
+
+
+/*
+** Linux 0.99pl10 and above...
+** From Karl London <karl@borg.demon.co.uk>.
+*/
+
+#ifdef __linux__
+# define BSD 1 /* pretend to be BSD based today */
+# undef NEEDVPRINTF 1 /* need a replacement for vprintf(3) */
+# define NEEDGETOPT 1 /* need a replacement for getopt(3) */
+# define HASUNSETENV 1 /* has unsetenv(3) call */
+# ifndef LA_TYPE
+# define LA_TYPE LA_FLOAT
+# endif
+# include <sys/sysmacros.h>
+# define GIDSET_T gid_t
+#endif
+
+
+/*
+** DELL SVR4 Issue 2.2, and others
+** From Kimmo Suominen <kim@grendel.lut.fi>
+**
+** It's on #ifdef DELL_SVR4 because Solaris also gets __svr4__
+** defined, and the definitions conflict.
+**
+** Peter Wemm <peter@perth.DIALix.oz.au> claims that the setreuid
+** trick works on DELL 2.2 (SVR4.0/386 version 4.0) and ESIX 4.0.3A
+** (SVR4.0/386 version 3.0).
+*/
+
+#ifdef DELL_SVR4
+ /* no changes necessary */
+ /* see general __svr4__ defines below */
+#endif
+
+
+/*
+** Apple A/UX 3.0
+*/
+
+#ifdef _AUX_SOURCE
+# include <sys/sysmacros.h>
+# define BSD /* has BSD routines */
+# define HASSTATFS 1 /* has the statfs(2) syscall */
+# define HASUNAME 1 /* use System V uname(2) system call */
+# define HASUSTAT 1 /* use System V ustat(2) syscall */
+# define HASSETVBUF 1 /* we have setvbuf(3) in libc */
+# define SIGFUNC_DEFINED /* sigfunc_t already defined */
+# ifndef IDENTPROTO
+# define IDENTPROTO 0 /* TCP/IP implementation is broken */
+# endif
+# define FORK fork
+# ifndef _PATH_SENDMAILCF
+# define _PATH_SENDMAILCF "/usr/lib/sendmail.cf"
+# endif
+# ifndef LA_TYPE
+# define LA_TYPE LA_ZERO
+# endif
+# undef WIFEXITED
+# undef WEXITSTATUS
+#endif
+
+
+/*
+** Encore UMAX V
+**
+** Not extensively tested.
+*/
+
+#ifdef UMAXV
+# include <limits.h>
+# define HASUNAME 1 /* use System V uname(2) system call */
+# define HASSTATFS 1 /* has the statfs(2) syscall */
+# define HASSETVBUF 1 /* we have setvbuf(3) in libc */
+# define HASINITGROUPS 1 /* has initgroups(3) call */
+# define HASGETUSERSHELL 0 /* does not have getusershell(3) call */
+# define SYS5SIGNALS 1 /* SysV signal semantics -- reset on each sig */
+# define SYS5SETPGRP 1 /* use System V setpgrp(2) syscall */
+# define FORK fork /* no vfork(2) primitive available */
+# define MAXPATHLEN PATH_MAX
+extern struct passwd *getpwent(), *getpwnam(), *getpwuid();
+extern struct group *getgrent(), *getgrnam(), *getgrgid();
+# undef WIFEXITED
+# undef WEXITSTATUS
+#endif
+
+
+/*
+** Stardent Titan 3000 running TitanOS 4.2.
+**
+** Must be compiled in "cc -43" mode.
+**
+** From Kate Hedstrom <kate@ahab.rutgers.edu>.
+**
+** Note the tweaking below after the BSD defines are set.
+*/
+
+#ifdef titan
+# define setpgid setpgrp
+typedef int pid_t;
+# undef WIFEXITED
+# undef WEXITSTATUS
+#endif
+
+
+/*
+** Sequent DYNIX 3.2.0
+**
+** From Jim Davis <jdavis@cs.arizona.edu>.
+*/
+
+#ifdef sequent
+# define BSD 1
+# define HASUNSETENV 1
+# define BSD4_3 1 /* to get signal() in conf.c */
+# define WAITUNION 1
+# define LA_TYPE LA_FLOAT
+# ifdef _POSIX_VERSION
+# undef _POSIX_VERSION /* set in <unistd.h> */
+# endif
+# undef HASSETVBUF /* don't actually have setvbuf(3) */
+# define setpgid setpgrp
+
+/* Have to redefine WIFEXITED to take an int, to work with waitfor() */
+# undef WIFEXITED
+# define WIFEXITED(s) (((union wait*)&(s))->w_stopval != WSTOPPED && \
+ ((union wait*)&(s))->w_termsig == 0)
+# define WEXITSTATUS(s) (((union wait*)&(s))->w_retcode)
+typedef int pid_t;
+# define isgraph(c) (isprint(c) && (c != ' '))
+
+# ifndef _PATH_UNIX
+# define _PATH_UNIX "/dynix"
+# endif
+# ifndef _PATH_SENDMAILCF
+# define _PATH_SENDMAILCF "/usr/lib/sendmail.cf"
+# endif
+
+#endif
+
+
+
+
+/**********************************************************************
+** End of Per-Operating System defines
+**********************************************************************/
+
+/**********************************************************************
+** More general defines
+**********************************************************************/
+
+/* general BSD defines */
+#ifdef BSD
+# define HASGETDTABLESIZE 1 /* has getdtablesize(2) call */
+# define HASSETREUID 1 /* has setreuid(2) call */
+# define HASINITGROUPS 1 /* has initgroups(2) call */
+# define HASFLOCK 1 /* has flock(2) call */
+#endif
+
+/* general System V Release 4 defines */
+#ifdef __svr4__
+# define SYSTEM5 1
+# define HASSETREUID 1 /* has seteuid(2) call & working saved uids */
+# ifndef HASGETUSERSHELL
+# define HASGETUSERSHELL 0 /* does not have getusershell(3) call */
+# endif
+# define setreuid(r, e) seteuid(e)
+
+# ifndef _PATH_UNIX
+# define _PATH_UNIX "/unix"
+# endif
+# ifndef _PATH_SENDMAILCF
+# define _PATH_SENDMAILCF "/usr/ucblib/sendmail.cf"
+# endif
+# ifndef _PATH_SENDMAILPID
+# define _PATH_SENDMAILPID "/usr/ucblib/sendmail.pid"
+# endif
+# ifndef SYSLOG_BUFSIZE
+# define SYSLOG_BUFSIZE 128
+# endif
+#endif
+
+/* general System V defines */
+# ifdef SYSTEM5
+# include <sys/sysmacros.h>
+# define HASUNAME 1 /* use System V uname(2) system call */
+# define HASUSTAT 1 /* use System V ustat(2) syscall */
+# define SYS5SETPGRP 1 /* use System V setpgrp(2) syscall */
+# define HASSETVBUF 1 /* we have setvbuf(3) in libc */
+# ifndef LA_TYPE
+# define LA_TYPE LA_INT
+# endif
+# define bcopy(s, d, l) (memmove((d), (s), (l)))
+# define bzero(d, l) (memset((d), '\0', (l)))
+# define bcmp(s, d, l) (memcmp((s), (d), (l)))
+# endif
+
+/* general POSIX defines */
+#ifdef _POSIX_VERSION
+# define HASSETSID 1 /* has Posix setsid(2) call */
+# define HASWAITPID 1 /* has Posix waitpid(2) call */
+#endif
+
+/*
+** If no type for argument two of getgroups call is defined, assume
+** it's an integer -- unfortunately, there seem to be several choices
+** here.
+*/
+
+#ifndef GIDSET_T
+# define GIDSET_T int
+#endif
+
+/*
+** Tweaking for systems that (for example) claim to be BSD but
+** don't have all the standard BSD routines (boo hiss).
+*/
+
+#ifdef titan
+# undef HASINITGROUPS /* doesn't have initgroups(3) call */