Hello, getconf. This is a slight reinvention of the

wheel^H^H^H^H^HPOSIX.2 and X/Open utility, and rather
more complicated than necessary.

7 files changed, 688 insertions, 0 deletions

diff --git a/usr.bin/getconf/Makefile b/usr.bin/getconf/Makefile
new file mode 100644
index 0000000..53a7bac
--- /dev/null
+++ b/usr.bin/getconf/Makefile
@@ -0,0 +1,13 @@
+#	$FreeBSD$
+
+PROG=	getconf
+
+SRCS=	confstr.c getconf.c pathconf.c sysconf.c
+CLEANFILES+= confstr.c pathconf.c sysconf.c
+
+.SUFFIXES: .gperf
+
+.gperf.c:
+	gperf -t -L ANSI-C -C -k 1,2,7-10,21,'$$' ${.IMPSRC} >${.TARGET}
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/getconf/confstr.gperf b/usr.bin/getconf/confstr.gperf
new file mode 100644
index 0000000..637c3ac
--- /dev/null
+++ b/usr.bin/getconf/confstr.gperf
@@ -0,0 +1,35 @@
+%{
+/*
+ * Copyright is disclaimed as to the contents of this file.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+
+#include <string.h>
+#include <unistd.h>
+
+#include "getconf.h"
+
+/*
+ * Override gperf's built-in external scope.
+ */
+static const struct map *in_word_set(const char *str, unsigned int len);
+
+%}
+struct map { char *name; int key; };
+%%
+PATH, _CS_PATH
+%%
+int
+find_confstr(const char *name)
+{
+	const struct map *rv;
+
+	rv = in_word_set(name, strlen(name));
+	if (rv != 0)
+		return rv->key;
+	else
+		return -1;
+}
diff --git a/usr.bin/getconf/getconf.1 b/usr.bin/getconf/getconf.1
new file mode 100644
index 0000000..3aac9ed
--- /dev/null
+++ b/usr.bin/getconf/getconf.1
@@ -0,0 +1,161 @@
+.\"
+.\" Copyright 2000 Massachusetts Institute of Technology
+.\"
+.\" Permission to use, copy, modify, and distribute this software and
+.\" its documentation for any purpose and without fee is hereby
+.\" granted, provided that both the above copyright notice and this
+.\" permission notice appear in all copies, that both the above
+.\" copyright notice and this permission notice appear in all
+.\" supporting documentation, and that the name of M.I.T. not be used
+.\" in advertising or publicity pertaining to distribution of the
+.\" software without specific, written prior permission.  M.I.T. makes
+.\" no representations about the suitability of this software for any
+.\" purpose.  It is provided "as is" without express or implied
+.\" warranty.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
+.\" ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
+.\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
+.\" SHALL M.I.T. 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.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd April 25, 2000
+.Dt GETCONF 1
+.Os
+.Sh NAME
+.Nm getconf
+.Nd retrieve standard configuration variables
+.Sh SYNOPSIS
+.Nm getconf
+.Op Fl v Ar environment
+.Ar path_var
+.Ar file
+.Pp
+.Nm getconf
+.Op Fl v Ar environment
+.Ar system_var
+.Sh DESCRIPTION
+The
+.Nm getconf
+utility outputs the value of
+.Tn POSIX
+or
+.Tn X/Open
+system or path configuration variable on the standard output.
+If the specified variable is undefined, the string
+.Dq Li undefined
+is output.
+.Pp
+The first form of the command, with two mandatory
+arguments, retrieves file- and filesystem-specific
+configuration variables using
+.Xr pathconf 2 .
+The second form, with a single argument, retrieves system
+configuration variables using
+.Xr confstr 3
+and
+.Xr sysconf 3 ,
+depending on the type of variable.
+.Pp
+All variables use the same name as the manifest constants defined in
+the relevant standard C-language bindings, including any leading
+underscore or prefix.
+That is to say,
+.Ar system_var
+might be
+.Dv ARG_MAX
+or
+.Dv _POSIX_VERSION ,
+as opposed to the
+.Xr sysconf 3
+names
+.Dv _SC_ARG_MAX
+or
+.Dv _SC_POSIX_VERSION .
+(There is one exception: there is no corresponding manifest constant
+to
+.Dv _CS_PATH ,
+so a
+.Ar system_var
+of
+.Dq Li PATH 
+is used.)
+.Pp
+The
+.Fl v Ar environment
+option is not supported, but provided for compatibility purposes.
+.Sh DIAGNOSTICS
+The
+.Nm getconf
+utility exits 0 on success or >0 if an error occurred.
+Use of a
+.Ar system_var
+or
+.Ar path_var
+which is completely unknown to the system is considered an error,
+causing a diagnostic message to be written to standard error; one
+which is known but merely undefined does not result in an error
+indication.
+.Pp
+Use of the unsupported
+.Fl v Ar environment
+option will result in a diagnostic message indicating that it is not
+supported.
+.Sh EXAMPLES
+The command:
+.Bd -literal -offset indent
+getconf PATH
+.Ed
+.Pp
+will display the system default setting for the
+.Ev PATH
+environment variable.
+.Pp
+The command:
+.Bd -literal -offset indent
+getconf NAME_MAX /tmp
+.Ed
+.Pp
+will display the maximum length of a filename in the
+.Pa /tmp
+directory.
+.Sh SEE ALSO
+.Xr confstr 3 ,
+.Xr pathconf 2 ,
+.Xr sysconf 3
+.Sh STANDARDS
+The
+.Nm getconf
+utility is expected to be compliant with
+.St -susv2 .
+.Sh HISTORY
+The
+.Nm getconf
+command first appeared in
+.Fx 5.0 .
+.Sh BUGS
+The original
+.Tn X/Open
+specification erroneously requires the return values of
+.Xr pathconf 2
+and
+.Xr sysconf 3
+to be printed using the
+.Xr printf 3
+format specifier
+.Li \&"%d" .
+We ignore that aspect of the specification and use the
+correct
+.Li \&"%ld"
+format.
+.Sh AUTHOR
+.An Garrett A. Wollman Aq wollman@lcs.mit.edu
diff --git a/usr.bin/getconf/getconf.c b/usr.bin/getconf/getconf.c
new file mode 100644
index 0000000..b33f574
--- /dev/null
+++ b/usr.bin/getconf/getconf.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2000 Massachusetts Institute of Technology
+ *
+ * Permission to use, copy, modify, and distribute this software and
+ * its documentation for any purpose and without fee is hereby
+ * granted, provided that both the above copyright notice and this
+ * permission notice appear in all copies, that both the above
+ * copyright notice and this permission notice appear in all
+ * supporting documentation, and that the name of M.I.T. not be used
+ * in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.  M.I.T. makes
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied
+ * warranty.
+ *
+ * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
+ * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
+ * SHALL M.I.T. 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.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sysexits.h>
+#include <unistd.h>
+
+#include "getconf.h"
+
+static void	do_confstr(const char *name, int key);
+static void	do_sysconf(const char *name, int key);
+static void	do_pathconf(const char *name, int key, const char *path);
+
+static void
+usage(void)
+{
+	fprintf(stderr, "usage:\n"
+		"\tgetconf [-v prog_model] system_var\n"
+		"\tgetconf [-v prog_model] path_var pathname\n");
+	exit(EX_USAGE);
+}
+
+int
+main(int argc, char **argv)
+{
+	int c;
+	const char *name, *vflag;
+	int key;
+
+	vflag = 0;
+
+	while ((c = getopt(argc, argv, "v:")) != -1) {
+		switch (c) {
+		case 'v':
+			vflag = optarg;
+			break;
+
+		default:
+			usage();
+		}
+	}
+
+	if (vflag)
+		warnx("-v %s ignored", vflag);
+
+	/* No arguments... */
+	if ((name = argv[optind]) == 0)
+		usage();
+
+	if (argv[optind + 1] == 0) { /* confstr or sysconf */
+		key = find_confstr(name);
+		if (key >= 0) {
+			do_confstr(name, key);
+		} else {		
+			key = find_sysconf(name);
+			if (key >= 0)
+				do_sysconf(name, key);
+			else 
+				errx(EX_USAGE,
+				     "no such configuration parameter `%s'",
+				     name);
+		}
+	} else {
+		key = find_pathconf(name);
+		if (key >= 0)
+			do_pathconf(name, key, argv[optind + 1]);
+		else
+			errx(EX_USAGE,
+			     "no such path configuration parameter `%s'",
+			     name);
+	}
+	return 0;
+}
+
+static void
+do_confstr(const char *name, int key)
+{
+	char *buf;
+	size_t len;
+
+	len = confstr(key, 0, 0);
+	if (len < 0)
+		err(EX_OSERR, "confstr: %s", name);
+	
+	if (len == 0) {
+		printf("undefined\n");
+	} else {
+		buf = alloca(len);
+		confstr(key, buf, len);
+		printf("%s\n", buf);
+	}
+}
+
+static void
+do_sysconf(const char *name, int key)
+{
+	long value;
+
+	errno = 0;
+	value = sysconf(key);
+	if (value == -1 && errno != 0)
+		err(EX_OSERR, "sysconf: %s", name);
+	else if (value == -1)
+		printf("undefined\n");
+	else
+		/*
+		 * SUSv2 specifies that the value, if defined, is to be
+		 * printed using the format "%d\n".  This is clearly
+		 * erroneous, since sysconf is defined to return a long
+		 * and not an int.
+		 */
+		printf("%ld\n", value);
+}
+
+static void
+do_pathconf(const char *name, int key, const char *path)
+{
+	long value;
+
+	errno = 0;
+	value = pathconf(path, key);
+	if (value == -1 && errno != 0)
+		err(EX_OSERR, "pathconf: %s", name);
+	else if (value == -1)
+		printf("undefined\n");
+	else
+		/*
+		 * SUSv2 specifies that the value, if defined, is to be
+		 * printed using the format "%d\n".  This is clearly
+		 * erroneous, since sysconf is defined to return a long
+		 * and not an int.
+		 */
+		printf("%ld\n", value);
+}
diff --git a/usr.bin/getconf/getconf.h b/usr.bin/getconf/getconf.h
new file mode 100644
index 0000000..0cb13c4
--- /dev/null
+++ b/usr.bin/getconf/getconf.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2000 Massachusetts Institute of Technology
+ *
+ * Permission to use, copy, modify, and distribute this software and
+ * its documentation for any purpose and without fee is hereby
+ * granted, provided that both the above copyright notice and this
+ * permission notice appear in all copies, that both the above
+ * copyright notice and this permission notice appear in all
+ * supporting documentation, and that the name of M.I.T. not be used
+ * in advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.  M.I.T. makes
+ * no representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied
+ * warranty.
+ *
+ * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
+ * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
+ * SHALL M.I.T. 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.
+ *
+ * $FreeBSD$
+ */
+
+int	find_confstr(const char *name);
+int	find_sysconf(const char *name);
+int	find_pathconf(const char *name);
+
diff --git a/usr.bin/getconf/pathconf.gperf b/usr.bin/getconf/pathconf.gperf
new file mode 100644
index 0000000..17ca458
--- /dev/null
+++ b/usr.bin/getconf/pathconf.gperf
@@ -0,0 +1,56 @@
+%{
+/*
+ * Copyright is disclaimed as to the contents of this file.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+
+#include <limits.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "getconf.h"
+
+/*
+ * Stuff that isn't defined right now -- we want this file to work
+ * unmodified once it is defined.
+ */
+#ifndef _PC_FILESIZEBITS
+#define	_PC_FILESIZEBITS	-1
+#endif
+
+/*
+ * Override gperf's built-in external scope.
+ */
+static const struct map *in_word_set(const char *str, unsigned int len);
+
+%}
+struct map { char *name; int key; };
+%%
+FILESIZEBITS, _PC_FILESIZEBITS
+LINK_MAX, _PC_LINK_MAX
+MAX_CANON, _PC_MAX_CANON
+MAX_INPUT, _PC_MAX_INPUT
+NAME_MAX, _PC_NAME_MAX
+PATH_MAX, _PC_PATH_MAX
+PIPE_BUF, _PC_PIPE_BUF
+_POSIX_CHOWN_RESTRICTED, _PC_CHOWN_RESTRICTED
+_POSIX_NO_TRUNC, _PC_NO_TRUNC
+_POSIX_VDISABLE, _PC_VDISABLE
+_POSIX_ASYNC_IO, _PC_ASYNC_IO
+_POSIX_PRIO_IO, _PC_PRIO_IO
+_POSIX_SYNC_IO, _PC_SYNC_IO
+%%
+int
+find_pathconf(const char *name)
+{
+	const struct map *rv;
+
+	rv = in_word_set(name, strlen(name));
+	if (rv != 0)
+		return rv->key;
+	else
+		return -1;
+}
diff --git a/usr.bin/getconf/sysconf.gperf b/usr.bin/getconf/sysconf.gperf
new file mode 100644
index 0000000..10e0204
--- /dev/null
+++ b/usr.bin/getconf/sysconf.gperf
@@ -0,0 +1,221 @@
+%{
+/*
+ * Copyright is disclaimed as to the contents of this file.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+
+#include <limits.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "getconf.h"
+
+/*
+ * Stuff that isn't defined right now -- we want this file to work
+ * unmodified once it is defined.
+ */
+#ifndef _SC_ATEXIT_MAX
+#define	_SC_ATEXIT_MAX	-1
+#endif
+#ifndef _SC_TTY_NAME_MAX
+#define	_SC_TTY_NAME_MAX	-1
+#endif
+#ifndef _SC_MQ_PRIO_MAX
+#define	_SC_MQ_PRIO_MAX	-1
+#endif
+#ifndef _SC_IOV_MAX
+#define _SC_IOV_MAX	-1
+#endif
+#ifndef	_SC_XOPEN_REALTIME
+#define	_SC_XOPEN_REALTIME	-1
+#endif
+#ifndef	_SC_XOPEN_LEGACY
+#define	_SC_XOPEN_LEGACY	-1
+#endif
+#ifndef	_SC_XCU_VERSION
+#define	_SC_XCU_VERSION	-1
+#endif
+#ifndef	_SC_PASS_MAX
+#define	_SC_PASS_MAX	-1
+#endif
+#ifndef	_SC_XOPEN_REALTIME_THREADS
+#define	_SC_XOPEN_REALTIME_THREADS	-1
+#endif
+#ifndef	_SC_LOGIN_NAME_MAX
+#define	_SC_LOGIN_NAME_MAX	-1
+#endif
+#ifndef	_SC_XBS5_LP64_OFF64
+#define	_SC_XBS5_LP64_OFF64	-1
+#endif
+#ifndef	_SC_XOPEN_SHM
+#define	_SC_XOPEN_SHM	-1
+#endif
+#ifndef	_SC_XOPEN_CRYPT
+#define	_SC_XOPEN_CRYPT	-1
+#endif
+#ifndef	_SC_XOPEN_UNIX
+#define	_SC_XOPEN_UNIX	-1
+#endif
+#ifndef	_SC_XOPEN_VERSION
+#define	_SC_XOPEN_VERSION	-1
+#endif
+#ifndef	_SC_THREAD_DESTRUCTOR_ITERATIONS
+#define	_SC_THREAD_DESTRUCTOR_ITERATIONS	-1
+#endif
+#ifndef	_SC_THREAD_KEYS_MAX
+#define	_SC_THREAD_KEYS_MAX	-1
+#endif
+#ifndef	_SC_2_C_VERSION
+#define	_SC_2_C_VERSION	-1
+#endif
+#ifndef	_SC_XBS5_LPBIG_OFFBIG
+#define	_SC_XBS5_LPBIG_OFFBIG	-1
+#endif
+#ifndef	_SC_THREAD_THREADS_MAX
+#define	_SC_THREAD_THREADS_MAX	-1
+#endif
+#ifndef	_SC_XBS5_ILP32_OFF32
+#define	_SC_XBS5_ILP32_OFF32	-1
+#endif
+#ifndef	_SC_XBS5_ILP32_OFFBIG
+#define	_SC_XBS5_ILP32_OFFBIG	-1
+#endif
+#ifndef	_SC_THREAD_STACK_MIN
+#define	_SC_THREAD_STACK_MIN	-1
+#endif
+#ifndef	_SC_XOPEN_ENH_I18N
+#define	_SC_XOPEN_ENH_I18N	-1
+#endif
+#ifndef	_SC_THREAD_ATTR_STACKSIZE
+#define	_SC_THREAD_ATTR_STACKSIZE	-1
+#endif
+#ifndef	_SC_THREAD_PRIORITY_SCHEDULING
+#define	_SC_THREAD_PRIORITY_SCHEDULING	-1
+#endif
+#ifndef	_SC_THREADS
+#define	_SC_THREADS	-1
+#endif
+#ifndef	_SC_THREAD_PROCESS_SHARED
+#define	_SC_THREAD_PROCESS_SHARED	-1
+#endif
+#ifndef	_SC_THREAD_SAFE_FUNCTIONS
+#define	_SC_THREAD_SAFE_FUNCTIONS	-1
+#endif
+#ifndef	_SC_THREAD_PRIO_PROTECT
+#define	_SC_THREAD_PRIO_PROTECT	-1
+#endif
+#ifndef	_SC_THREAD_ATTR_STACKADDR
+#define	_SC_THREAD_ATTR_STACKADDR	-1
+#endif
+#ifndef	_SC_THREAD_PRIO_INHERIT
+#define	_SC_THREAD_PRIO_INHERIT	-1
+#endif
+
+/*
+ * Override gperf's built-in external scope.
+ */
+static const struct map *in_word_set(const char *str, unsigned int len);
+
+%}
+struct map { char *name; int key; };
+%%
+AIO_LISTIO_MAX, _SC_AIO_LISTIO_MAX
+AIO_MAX, _SC_AIO_MAX
+AIO_PRIO_DELTA_MAX, _SC_AIO_PRIO_DELTA_MAX
+ARG_MAX, _SC_ARG_MAX
+ATEXIT_MAX, _SC_ATEXIT_MAX
+BC_BASE_MAX, _SC_BC_BASE_MAX
+BC_DIM_MAX, _SC_BC_DIM_MAX
+BC_SCALE_MAX, _SC_BC_SCALE_MAX
+BC_STRING_MAX, _SC_BC_STRING_MAX
+CHILD_MAX, _SC_CHILD_MAX
+CLK_TCK, _SC_CLK_TCK
+COLL_WEIGHTS_MAX, _SC_COLL_WEIGHTS_MAX
+DELAYTIMER_MAX, _SC_DELAYTIMER_MAX
+EXPR_NEST_MAX, _SC_EXPR_NEST_MAX
+IOV_MAX, _SC_IOV_MAX
+LINE_MAX, _SC_LINE_MAX
+LOGIN_NAME_MAX, _SC_LOGIN_NAME_MAX 
+MQ_OPEN_MAX, _SC_MQ_OPEN_MAX
+MQ_PRIO_MAX, _SC_MQ_PRIO_MAX
+NGROUPS_MAX, _SC_NGROUPS_MAX
+OPEN_MAX, _SC_OPEN_MAX
+PAGESIZE, _SC_PAGESIZE
+PAGE_SIZE, _SC_PAGESIZE
+PASS_MAX, _SC_PASS_MAX
+PTHREAD_DESTRUCTOR_ITERATIONS, _SC_THREAD_DESTRUCTOR_ITERATIONS 
+PTHREAD_KEYS_MAX, _SC_THREAD_KEYS_MAX 
+PTHREAD_STACK_MIN, _SC_THREAD_STACK_MIN 
+PTHREAD_THREADS_MAX, _SC_THREAD_THREADS_MAX 
+RE_DUP_MAX, _SC_RE_DUP_MAX
+RTSIG_MAX, _SC_RTSIG_MAX
+SEM_NSEMS_MAX, _SC_SEM_NSEMS_MAX
+SEM_VALUE_MAX, _SC_SEM_VALUE_MAX
+SIGQUEUE_MAX, _SC_SIGQUEUE_MAX
+STREAM_MAX, _SC_STREAM_MAX
+TIMER_MAX, _SC_TIMER_MAX
+TTY_NAME_MAX, _SC_TTY_NAME_MAX 
+TZNAME_MAX, _SC_TZNAME_MAX
+_POSIX2_CHAR_TERM, _SC_2_CHAR_TERM
+_POSIX2_C_BIND, _SC_2_C_BIND
+_POSIX2_C_DEV, _SC_2_C_DEV
+_POSIX2_C_VERSION, _SC_2_C_VERSION
+_POSIX2_FORT_DEV, _SC_2_FORT_DEV
+_POSIX2_FORT_RUN, _SC_2_FORT_RUN
+_POSIX2_LOCALEDEF, _SC_2_LOCALEDEF
+_POSIX2_SW_DEV, _SC_2_SW_DEV
+_POSIX2_UPE, _SC_2_UPE
+_POSIX2_VERSION, _SC_2_VERSION
+_POSIX_ASYNCHRONOUS_IO, _SC_ASYNCHRONOUS_IO 
+_POSIX_FSYNC, _SC_FSYNC 
+_POSIX_JOB_CONTROL, _SC_JOB_CONTROL
+_POSIX_MAPPED_FILES, _SC_MAPPED_FILES 
+_POSIX_MEMLOCK, _SC_MEMLOCK 
+_POSIX_MEMLOCK_RANGE, _SC_MEMLOCK_RANGE 
+_POSIX_MEMORY_PROTECTION, _SC_MEMORY_PROTECTION 
+_POSIX_MESSAGE_PASSING, _SC_MESSAGE_PASSING 
+_POSIX_PRIORITIZED_IO, _SC_PRIORITIZED_IO 
+_POSIX_PRIORITY_SCHEDULING, _SC_PRIORITY_SCHEDULING 
+_POSIX_REALTIME_SIGNALS, _SC_REALTIME_SIGNALS 
+_POSIX_SAVED_IDS, _SC_SAVED_IDS
+_POSIX_SEMAPHORES, _SC_SEMAPHORES 
+_POSIX_SHARED_MEMORY_OBJECTS, _SC_SHARED_MEMORY_OBJECTS 
+_POSIX_SYNCHRONIZED_IO, _SC_SYNCHRONIZED_IO 
+_POSIX_THREADS, _SC_THREADS 
+_POSIX_THREAD_ATTR_STACKADDR, _SC_THREAD_ATTR_STACKADDR 
+_POSIX_THREAD_ATTR_STACKSIZE, _SC_THREAD_ATTR_STACKSIZE 
+_POSIX_THREAD_PRIORITY_SCHEDULING, _SC_THREAD_PRIORITY_SCHEDULING 
+_POSIX_THREAD_PRIO_INHERIT, _SC_THREAD_PRIO_INHERIT 
+_POSIX_THREAD_PRIO_PROTECT, _SC_THREAD_PRIO_PROTECT 
+_POSIX_THREAD_PROCESS_SHARED, _SC_THREAD_PROCESS_SHARED 
+_POSIX_THREAD_SAFE_FUNCTIONS, _SC_THREAD_SAFE_FUNCTIONS 
+_POSIX_TIMERS, _SC_TIMERS
+_POSIX_VERSION, _SC_VERSION
+_XBS5_ILP32_OFF32, _SC_XBS5_ILP32_OFF32
+_XBS5_ILP32_OFFBIG, _SC_XBS5_ILP32_OFFBIG
+_XBS5_LP64_OFF64, _SC_XBS5_LP64_OFF64
+_XBS5_LPBIG_OFFBIG, _SC_XBS5_LPBIG_OFFBIG
+_XOPEN_CRYPT, _SC_XOPEN_CRYPT
+_XOPEN_ENH_I18N, _SC_XOPEN_ENH_I18N
+_XOPEN_LEGACY, _SC_XOPEN_LEGACY
+_XOPEN_REALTIME, _SC_XOPEN_REALTIME
+_XOPEN_REALTIME_THREADS, _SC_XOPEN_REALTIME_THREADS
+_XOPEN_SHM, _SC_XOPEN_SHM
+_XOPEN_UNIX, _SC_XOPEN_UNIX
+_XOPEN_VERSION, _SC_XOPEN_VERSION
+_XOPEN_XCU_VERSION, _SC_XCU_VERSION
+%%
+int
+find_sysconf(const char *name)
+{
+	const struct map *rv;
+
+	rv = in_word_set(name, strlen(name));
+	if (rv != 0)
+		return rv->key;
+	else
+		return -1;
+}