Adding upstream version 1.9.15p5.upstream/1.9.15p5upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 653 insertions, 0 deletions

diff --git a/include/compat/charclass.h b/include/compat/charclass.h
new file mode 100644
index 0000000..77c8d7f
--- /dev/null
+++ b/include/compat/charclass.h
@@ -0,0 +1,41 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2008, 2010 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * POSIX character class support for fnmatch() and glob().
+ */
+static struct cclass {
+	const char *name;
+	int (*isctype)(int);
+} cclasses[] = {
+	{ "alnum",	isalnum },
+	{ "alpha",	isalpha },
+	{ "blank",	isblank },
+	{ "cntrl",	iscntrl },
+	{ "digit",	isdigit },
+	{ "graph",	isgraph },
+	{ "lower",	islower },
+	{ "print",	isprint },
+	{ "punct",	ispunct },
+	{ "space",	isspace },
+	{ "upper",	isupper },
+	{ "xdigit",	isxdigit },
+	{ NULL,		NULL }
+};
+
+#define NCCLASSES	(nitems(cclasses) - 1)
diff --git a/include/compat/endian.h b/include/compat/endian.h
new file mode 100644
index 0000000..fe6ee83
--- /dev/null
+++ b/include/compat/endian.h
@@ -0,0 +1,80 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2013, 2022 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef COMPAT_ENDIAN_H
+#define COMPAT_ENDIAN_H
+
+#ifndef BYTE_ORDER
+# undef LITTLE_ENDIAN
+# define LITTLE_ENDIAN	1234
+# undef BIG_ENDIAN
+# define BIG_ENDIAN	4321
+# undef UNKNOWN_ENDIAN
+# define UNKNOWN_ENDIAN	0
+
+/*
+ * Attempt to guess endianness.
+ * Solaris may define _LITTLE_ENDIAN and _BIG_ENDIAN to 1
+ * HP-UX may define __LITTLE_ENDIAN__ and __BIG_ENDIAN__ to 1
+ * Otherwise, check for cpu-specific cpp defines.
+ * Note that some CPUs are bi-endian, including: arm, powerpc, alpha,
+ * sparc64, mips, hppa, sh4 and ia64.
+ * We just check for the most common uses.
+ */
+
+# if defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \
+    (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+#  define BYTE_ORDER	LITTLE_ENDIAN
+# elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
+    (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+#  define BYTE_ORDER	BIG_ENDIAN
+# elif defined(__BYTE_ORDER)
+#  define BYTE_ORDER	__BYTE_ORDER
+# elif defined(_BYTE_ORDER)
+#  define BYTE_ORDER	_BYTE_ORDER
+# elif defined(_LITTLE_ENDIAN) || defined(__LITTLE_ENDIAN__)
+#  define BYTE_ORDER	LITTLE_ENDIAN
+# elif defined(_BIG_ENDIAN) || defined(__BIG_ENDIAN__)
+#  define BYTE_ORDER	BIG_ENDIAN
+# elif defined(__alpha__) || defined(__alpha) || defined(__amd64) || \
+       defined(BIT_ZERO_ON_RIGHT) || defined(i386) || defined(__i386) || \
+       defined(MIPSEL) || defined(_MIPSEL) || defined(ns32000) || \
+       defined(__ns3200) || defined(sun386) || defined(vax) || \
+       defined(__vax) || defined(__x86__) || defined(__riscv) || \
+       (defined(sun) && defined(__powerpc)) || \
+       (!defined(__hpux) && defined(__ia64))
+#  define BYTE_ORDER	LITTLE_ENDIAN
+# elif defined(__68k__) || defined(apollo) || defined(BIT_ZERO_ON_LEFT) || \
+       defined(__convex__) || defined(_CRAY) || defined(DGUX) || \
+       defined(__hppa) || defined(__hp9000) || defined(__hp9000s300) || \
+       defined(__hp9000s700) || defined(__hp3000s900) || \
+       defined(ibm032) || defined(ibm370) || defined(_IBMR2) || \
+       defined(is68k) || defined(mc68000) || defined(m68k) || \
+       defined(__m68k) || defined(m88k) || defined(__m88k) || \
+       defined(MIPSEB) || defined(_MIPSEB) || defined(MPE) || \
+       defined(pyr) || defined(__powerpc) || defined(__powerpc__) || \
+       defined(sel) || defined(__sparc) || defined(__sparc__) || \
+       defined(tahoe) || (defined(__hpux) && defined(__ia64)) || \
+       (defined(sun) && defined(__powerpc))
+#  define BYTE_ORDER	BIG_ENDIAN
+# else
+#  define BYTE_ORDER	UNKNOWN_ENDIAN
+# endif
+#endif /* BYTE_ORDER */
+
+#endif /* COMPAT_ENDIAN_H */
diff --git a/include/compat/fnmatch.h b/include/compat/fnmatch.h
new file mode 100644
index 0000000..75cac1f
--- /dev/null
+++ b/include/compat/fnmatch.h
@@ -0,0 +1,34 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2011 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef COMPAT_FNMATCH_H
+#define COMPAT_FNMATCH_H
+
+#define	FNM_NOMATCH	1		/* String does not match pattern */
+
+#define	FNM_PATHNAME	(1 << 0)	/* Globbing chars don't match '/' */
+#define	FNM_PERIOD	(1 << 1)	/* Leading '.' in string must exactly */
+#define	FNM_NOESCAPE	(1 << 2)	/* Backslash treated as ordinary char */
+#define	FNM_LEADING_DIR	(1 << 3)	/* Only match the leading directory */
+#define	FNM_CASEFOLD	(1 << 4)	/* Case insensitive matching */
+
+sudo_dso_public int sudo_fnmatch(const char *pattern, const char *string, int flags);
+
+#define fnmatch(_a, _b, _c)	sudo_fnmatch((_a), (_b), (_c))
+
+#endif /* COMPAT_FNMATCH_H */
diff --git a/include/compat/getaddrinfo.h b/include/compat/getaddrinfo.h
new file mode 100644
index 0000000..c1f87ef
--- /dev/null
+++ b/include/compat/getaddrinfo.h
@@ -0,0 +1,83 @@
+/*
+ * Replacement implementation of getaddrinfo.
+ *
+ * This is an implementation of the getaddrinfo family of functions for
+ * systems that lack it, so that code can use getaddrinfo always.  It provides
+ * IPv4 support only; for IPv6 support, a system getaddrinfo implementation is
+ * required.
+ *
+ * The canonical version of this file is maintained in the rra-c-util package,
+ * which can be found at <http://www.eyrie.org/~eagle/software/rra-c-util/>.
+ *
+ * Written by Russ Allbery <rra@stanford.edu>
+ *
+ * The authors hereby relinquish any claim to any copyright that they may have
+ * in this work, whether granted under contract or by operation of law or
+ * international treaty, and hereby commit to the public, at large, that they
+ * shall not, at any time in the future, seek to enforce any copyright in this
+ * work against any person or entity, or prevent any person or entity from
+ * copying, publishing, distributing or creating derivative works of this
+ * work.
+ */
+
+#ifndef COMPAT_GETADDRINFO_H
+#define COMPAT_GETADDRINFO_H
+
+#include <config.h>
+
+/* Skip this entire file if a system getaddrinfo was detected. */
+#ifndef HAVE_GETADDRINFO
+
+/* OpenBSD likes to have sys/types.h included before sys/socket.h. */
+#include <sys/types.h>
+#include <sys/socket.h>
+
+/* The struct returned by getaddrinfo, from RFC 3493. */
+struct addrinfo {
+    int ai_flags;               /* AI_PASSIVE, AI_CANONNAME, .. */
+    int ai_family;              /* AF_xxx */
+    int ai_socktype;            /* SOCK_xxx */
+    int ai_protocol;            /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
+    socklen_t ai_addrlen;       /* Length of ai_addr */
+    char *ai_canonname;         /* Canonical name for nodename */
+    struct sockaddr *ai_addr;   /* Binary address */
+    struct addrinfo *ai_next;   /* Next structure in linked list */
+};
+
+/* Constants for ai_flags from RFC 3493, combined with binary or. */
+#define AI_PASSIVE      0x0001
+#define AI_CANONNAME    0x0002
+#define AI_NUMERICHOST  0x0004
+#define AI_NUMERICSERV  0x0008
+#define AI_V4MAPPED     0x0010
+#define AI_ALL          0x0020
+#define AI_ADDRCONFIG   0x0040
+
+/* Error return codes from RFC 3493. */
+#define EAI_AGAIN       1       /* Temporary name resolution failure */
+#define EAI_BADFLAGS    2       /* Invalid value in ai_flags parameter */
+#define EAI_FAIL        3       /* Permanent name resolution failure */
+#define EAI_FAMILY      4       /* Address family not recognized */
+#define EAI_MEMORY      5       /* Memory allocation failure */
+#define EAI_NONAME      6       /* nodename or servname unknown */
+#define EAI_SERVICE     7       /* Service not recognized for socket type */
+#define EAI_SOCKTYPE    8       /* Socket type not recognized */
+#define EAI_SYSTEM      9       /* System error occurred, see errno */
+#define EAI_OVERFLOW    10      /* An argument buffer overflowed */
+
+/* Function prototypes. */
+sudo_dso_public int sudo_getaddrinfo(const char *nodename, const char *servname,
+                const struct addrinfo *hints, struct addrinfo **res);
+sudo_dso_public void sudo_freeaddrinfo(struct addrinfo *ai);
+sudo_dso_public const char *sudo_gai_strerror(int ecode);
+
+/* Map sudo_* to RFC 3493 names. */
+#undef getaddrinfo
+#define getaddrinfo(_a, _b, _c, _d) sudo_getaddrinfo((_a), (_b), (_c), (_d))
+#undef freeaddrinfo
+#define freeaddrinfo(_a) sudo_freeaddrinfo((_a))
+#undef gai_strerror
+#define gai_strerror(_a) sudo_gai_strerror((_a))
+
+#endif /* !HAVE_GETADDRINFO */
+#endif /* COMPAT_GETADDRINFO_H */
diff --git a/include/compat/getopt.h b/include/compat/getopt.h
new file mode 100644
index 0000000..da99d34
--- /dev/null
+++ b/include/compat/getopt.h
@@ -0,0 +1,83 @@
+/*	$OpenBSD: getopt.h,v 1.2 2008/06/26 05:42:04 ray Exp $	*/
+/*	$NetBSD: getopt.h,v 1.4 2000/07/07 10:43:54 ad Exp $	*/
+/*	$FreeBSD: head/include/getopt.h 203963 2010-02-16 19:28:10Z imp $ */
+
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2000 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Dieter Baron and Thomas Klausner.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef COMPAT_GETOPT_H
+#define COMPAT_GETOPT_H
+
+/*
+ * GNU-like getopt_long()/getopt_long_only() with 4.4BSD optreset extension.
+ */
+#define no_argument        0
+#define required_argument  1
+#define optional_argument  2
+
+struct option {
+	/* name of long option */
+	const char *name;
+	/*
+	 * one of no_argument, required_argument, and optional_argument:
+	 * whether option takes an argument
+	 */
+	int has_arg;
+	/* if not NULL, set *flag to val when option found */
+	int *flag;
+	/* if flag not NULL, value to set *flag to; else return value */
+	int val;
+};
+
+sudo_dso_public int sudo_getopt_long(int, char * const *, const char *,
+	    const struct option *, int *);
+#undef getopt_long
+#define getopt_long(_a, _b, _c, _d, _e) \
+	sudo_getopt_long((_a), (_b), (_c), (_d), (_e))
+
+sudo_dso_public int sudo_getopt_long_only(int, char * const *, const char *,
+	    const struct option *, int *);
+#undef getopt_long_only
+#define getopt_long_only(_a, _b, _c, _d, _e) \
+	sudo_getopt_long_only((_a), (_b), (_c), (_d), (_e))
+#if 0
+sudo_dso_public int sudo_getopt(int, char * const [], const char *);
+#undef getopt
+#define getopt(_a, _b, _c)	sudo_getopt((_a), (_b), (_c))
+#endif
+
+extern	char *optarg;			/* getopt(3) external variables */
+extern	int opterr;
+extern	int optind;
+extern	int optopt;
+extern	int optreset;
+ 
+#endif /* !COMPAT_GETOPT_H */
diff --git a/include/compat/glob.h b/include/compat/glob.h
new file mode 100644
index 0000000..7c06a2e
--- /dev/null
+++ b/include/compat/glob.h
@@ -0,0 +1,78 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Guido van Rossum.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)glob.h	8.1 (Berkeley) 6/2/93
+ */
+
+#ifndef COMPAT_GLOB_H
+#define	COMPAT_GLOB_H
+
+struct stat;
+typedef struct {
+	size_t gl_pathc;	/* Count of total paths so far. */
+	size_t gl_matchc;	/* Count of paths matching pattern. */
+	size_t gl_offs;		/* Reserved at beginning of gl_pathv. */
+	int gl_flags;		/* Copy of flags parameter to glob. */
+	char **gl_pathv;	/* List of paths matching pattern. */
+				/* Copy of errfunc parameter to glob. */
+	int (*gl_errfunc)(const char *, int);
+} glob_t;
+
+/* Flags */
+#define	GLOB_APPEND	0x0001	/* Append to output from previous call. */
+#define	GLOB_DOOFFS	0x0002	/* Use gl_offs. */
+#define	GLOB_ERR	0x0004	/* Return on error. */
+#define	GLOB_MARK	0x0008	/* Append / to matching directories. */
+#define	GLOB_NOCHECK	0x0010	/* Return pattern itself if nothing matches. */
+#define	GLOB_NOSORT	0x0020	/* Don't sort. */
+#define	GLOB_NOESCAPE	0x0040	/* Disable backslash escaping. */
+
+/* Non-POSIX extensions */
+#define	GLOB_BRACE	0x0080	/* Expand braces ala csh. */
+#define	GLOB_MAGCHAR	0x0100	/* Pattern had globbing characters. */
+#define	GLOB_TILDE	0x0200	/* Expand tilde names from the passwd file. */
+#define	GLOB_LIMIT	0x0400	/* Limit pattern match output to ARG_MAX */
+
+/* Error values returned by glob(3) */
+#define	GLOB_NOSPACE	(-1)	/* Malloc call failed. */
+#define	GLOB_ABORTED	(-2)	/* Unignored error. */
+#define	GLOB_NOMATCH	(-3)	/* No match and GLOB_NOCHECK not set. */
+#define	GLOB_NOSYS	(-4)	/* Function not supported. */
+
+sudo_dso_public int  sudo_glob(const char *, int, int (*)(const char *, int), glob_t *);
+sudo_dso_public void sudo_globfree(glob_t *);
+
+#define glob(_a, _b, _c, _d) sudo_glob((_a), (_b), (_c), (_d))
+#define globfree(_a) sudo_globfree((_a))
+
+#endif /* !COMPAT_GLOB_H */
diff --git a/include/compat/nss_dbdefs.h b/include/compat/nss_dbdefs.h
new file mode 100644
index 0000000..726beae
--- /dev/null
+++ b/include/compat/nss_dbdefs.h
@@ -0,0 +1,110 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2013 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifndef COMPAT_NSS_DBDEFS_H
+#define COMPAT_NSS_DBDEFS_H
+
+/*
+ * Bits of nss_dbdefs.h and nss_common.h needed to implement
+ * getgrouplist(3) using nss_search(3).
+ *
+ * HP-UX does not ship those headers so we need this compatibility header.
+ * It may also work on other systems that use a Solaris-derived nsswitch
+ * API.
+ */
+
+#ifdef NEED_HPUX_MUTEX
+# include <synch.h>
+#endif
+
+typedef enum {
+    NSS_SUCCESS,
+    NSS_NOTFOUND,
+    NSS_UNAVAIL,
+    NSS_TRYAGAIN
+} nss_status_t;
+
+typedef struct nss_db_params {
+    const char *name;
+    const char *config_name;
+    const char *default_config;
+    unsigned int max_active_per_src;
+    unsigned int max_dormant_per_src;  
+    int flags;
+    void *finders;
+    void *private;
+    void (*cleanup)(struct nss_db_params *);
+} nss_db_params_t;
+
+struct nss_groupsbymem {
+    const char *username;
+    gid_t *gid_array;
+    int maxgids;
+    int force_slow_way;
+    int (*str2ent)(const char *instr, int instr_len, void *ent, char *buffer, int buflen);
+    nss_status_t (*process_cstr)(const char *instr, int instr_len, struct nss_groupsbymem *);
+    int numgids;
+};
+
+typedef struct {
+    void *result;	/* group struct to fill in. */
+    char *buffer;	/* string buffer for above */
+    int buflen;		/* string buffer size */
+} nss_XbyY_buf_t;
+
+struct nss_db_state;
+typedef struct {
+    struct nss_db_state *s;
+#ifdef NEED_HPUX_MUTEX
+    lwp_mutex_t lock;
+#endif
+} nss_db_root_t;
+
+#ifdef NEED_HPUX_MUTEX
+# define NSS_DB_ROOT_INIT		{ 0, LWP_MUTEX_INITIALIZER }
+#else
+# define NSS_DB_ROOT_INIT		{ 0 }
+#endif
+#define DEFINE_NSS_DB_ROOT(name)	nss_db_root_t name = NSS_DB_ROOT_INIT
+
+/* Backend function to find all groups a user belongs to for initgroups(). */
+#define NSS_DBOP_GROUP_BYMEMBER		6
+
+/* str2ent function return values */
+#define NSS_STR_PARSE_SUCCESS	0
+#define NSS_STR_PARSE_PARSE	1
+#define NSS_STR_PARSE_ERANGE	2
+
+/* Max length for an /etc/group file line. */
+#define NSS_BUFLEN_GROUP		8192
+
+/* HP-UX uses an extra underscore for these functions. */
+#ifdef HAVE___NSS_INITF_GROUP
+# define _nss_initf_group       __nss_initf_group
+#endif
+#ifdef HAVE___NSS_XBYY_BUF_ALLOC
+# define _nss_XbyY_buf_alloc    __nss_XbyY_buf_alloc
+# define _nss_XbyY_buf_free     __nss_XbyY_buf_free
+#endif
+
+typedef void (*nss_db_initf_t)(nss_db_params_t *);
+extern nss_status_t nss_search(nss_db_root_t *, nss_db_initf_t, int search_fnum, void *search_args);
+extern nss_XbyY_buf_t *_nss_XbyY_buf_alloc(int struct_size, int buffer_size);
+extern void _nss_XbyY_buf_free(nss_XbyY_buf_t *);
+
+#endif /* COMPAT_NSS_DBDEFS_H */
diff --git a/include/compat/sha2.h b/include/compat/sha2.h
new file mode 100644
index 0000000..2908696
--- /dev/null
+++ b/include/compat/sha2.h
@@ -0,0 +1,100 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2013-2015 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * Derived from the public domain SHA-1 and SHA-2 implementations
+ * by Steve Reid and Wei Dai respectively.
+ */
+
+#ifndef COMPAT_SHA2_H
+#define COMPAT_SHA2_H
+
+#define	SHA224_BLOCK_LENGTH		64
+#define	SHA224_DIGEST_LENGTH		28
+#define	SHA224_DIGEST_STRING_LENGTH	(SHA224_DIGEST_LENGTH * 2 + 1)
+
+#define	SHA256_BLOCK_LENGTH		64
+#define	SHA256_DIGEST_LENGTH		32
+#define	SHA256_DIGEST_STRING_LENGTH	(SHA256_DIGEST_LENGTH * 2 + 1)
+
+#define	SHA384_BLOCK_LENGTH		128
+#define	SHA384_DIGEST_LENGTH		48
+#define	SHA384_DIGEST_STRING_LENGTH	(SHA384_DIGEST_LENGTH * 2 + 1)
+
+#define	SHA512_BLOCK_LENGTH		128
+#define	SHA512_DIGEST_LENGTH		64
+#define	SHA512_DIGEST_STRING_LENGTH	(SHA512_DIGEST_LENGTH * 2 + 1)
+
+typedef struct {
+    union {
+	uint32_t st32[8];	/* sha224 and sha256 */
+	uint64_t st64[8];	/* sha384 and sha512 */
+    } state;
+    uint64_t count[2];
+    uint8_t buffer[SHA512_BLOCK_LENGTH];
+} SHA2_CTX;
+
+sudo_dso_public void sudo_SHA224Init(SHA2_CTX *ctx);
+sudo_dso_public void sudo_SHA224Pad(SHA2_CTX *ctx);
+sudo_dso_public void sudo_SHA224Transform(uint32_t state[8], const uint8_t buffer[SHA224_BLOCK_LENGTH]);
+sudo_dso_public void sudo_SHA224Update(SHA2_CTX *ctx, const uint8_t *data, size_t len);
+sudo_dso_public void sudo_SHA224Final(uint8_t digest[SHA224_DIGEST_LENGTH], SHA2_CTX *ctx);
+
+#define SHA224Init		sudo_SHA224Init
+#define SHA224Pad		sudo_SHA224Pad
+#define SHA224Transform		sudo_SHA224Transform
+#define SHA224Update		sudo_SHA224Update
+#define SHA224Final		sudo_SHA224Final
+
+sudo_dso_public void sudo_SHA256Init(SHA2_CTX *ctx);
+sudo_dso_public void sudo_SHA256Pad(SHA2_CTX *ctx);
+sudo_dso_public void sudo_SHA256Transform(uint32_t state[8], const uint8_t buffer[SHA256_BLOCK_LENGTH]);
+sudo_dso_public void sudo_SHA256Update(SHA2_CTX *ctx, const uint8_t *data, size_t len);
+sudo_dso_public void sudo_SHA256Final(uint8_t digest[SHA256_DIGEST_LENGTH], SHA2_CTX *ctx);
+
+#define SHA256Init		sudo_SHA256Init
+#define SHA256Pad		sudo_SHA256Pad
+#define SHA256Transform		sudo_SHA256Transform
+#define SHA256Update		sudo_SHA256Update
+#define SHA256Final		sudo_SHA256Final
+
+sudo_dso_public void sudo_SHA384Init(SHA2_CTX *ctx);
+sudo_dso_public void sudo_SHA384Pad(SHA2_CTX *ctx);
+sudo_dso_public void sudo_SHA384Transform(uint64_t state[8], const uint8_t buffer[SHA384_BLOCK_LENGTH]);
+sudo_dso_public void sudo_SHA384Update(SHA2_CTX *ctx, const uint8_t *data, size_t len);
+sudo_dso_public void sudo_SHA384Final(uint8_t digest[SHA384_DIGEST_LENGTH], SHA2_CTX *ctx);
+
+#define SHA384Init		sudo_SHA384Init
+#define SHA384Pad		sudo_SHA384Pad
+#define SHA384Transform		sudo_SHA384Transform
+#define SHA384Update		sudo_SHA384Update
+#define SHA384Final		sudo_SHA384Final
+
+sudo_dso_public void sudo_SHA512Init(SHA2_CTX *ctx);
+sudo_dso_public void sudo_SHA512Pad(SHA2_CTX *ctx);
+sudo_dso_public void sudo_SHA512Transform(uint64_t state[8], const uint8_t buffer[SHA512_BLOCK_LENGTH]);
+sudo_dso_public void sudo_SHA512Update(SHA2_CTX *ctx, const uint8_t *data, size_t len);
+sudo_dso_public void sudo_SHA512Final(uint8_t digest[SHA512_DIGEST_LENGTH], SHA2_CTX *ctx);
+
+#define SHA512Init		sudo_SHA512Init
+#define SHA512Pad		sudo_SHA512Pad
+#define SHA512Transform		sudo_SHA512Transform
+#define SHA512Update		sudo_SHA512Update
+#define SHA512Final		sudo_SHA512Final
+
+#endif /* COMPAT_SHA2_H */
diff --git a/include/compat/stdbool.h b/include/compat/stdbool.h
new file mode 100644
index 0000000..b865a46
--- /dev/null
+++ b/include/compat/stdbool.h
@@ -0,0 +1,44 @@
+/* $OpenBSD: stdbool.h,v 1.5 2010/07/24 22:17:03 guenther Exp $ */
+
+/*
+ * Written by Marc Espie, September 25, 1999
+ * Public domain.
+ */
+
+#ifndef	COMPAT_STDBOOL_H
+#define	COMPAT_STDBOOL_H
+
+#ifndef __cplusplus
+
+#if (defined(HAVE__BOOL) && HAVE__BOOL > 0) || defined(lint)
+/* Support for _C99: type _Bool is already built-in. */
+#define false	0
+#define true	1
+
+#else
+/* `_Bool' type must promote to `int' or `unsigned int'. */
+typedef enum {
+	false = 0,
+	true = 1
+} _Bool;
+
+/* And those constants must also be available as macros. */
+#define	false	false
+#define	true	true
+
+#endif
+
+/* User visible type `bool' is provided as a macro which may be redefined */
+#define bool _Bool
+
+#else /* __cplusplus */
+#define _Bool 	bool
+#define bool 	bool
+#define false 	false
+#define true 	true
+#endif /* __cplusplus */
+
+/* Inform that everything is fine */
+#define __bool_true_false_are_defined 1
+
+#endif /* COMPAT_STDBOOL_H */