Add getconf(1) from FreeBSD r259958

This one lacks -a but is simpler to port than the (e)glibc one,
and should be way enough for usage patterns like counting CPUs,
cf. https://gist.github.com/jj1bdx/5746298

TODO: Handle message files?
TODO: Install manpage?

src/bin/Jamfile

@@ -265,6 +265,7 @@ SubInclude HAIKU_TOP src bin findutils ;
 SubInclude HAIKU_TOP src bin fwcontrol ;
 SubInclude HAIKU_TOP src bin gawk ;
 SubInclude HAIKU_TOP src bin gdb ;
+SubInclude HAIKU_TOP src bin getconf ;
 SubInclude HAIKU_TOP src bin hid_decode ;
 SubInclude HAIKU_TOP src bin ideinfo ;
 SubInclude HAIKU_TOP src bin keymap ;

src/bin/getconf/Jamfile

@@ -0,0 +1,37 @@
+SubDir HAIKU_TOP src bin getconf ;
+
+UseHeaders [ FDirName $(HAIKU_TOP) headers compatibility bsd ] : true ;
+
+rule GetConfKeysGen
+{
+	SEARCH on $(2) = $(SEARCH_SOURCE) ;
+	SEARCH on $(3) = $(SEARCH_SOURCE) ;
+
+	Depends $(1) : $(2) $(3) ;
+	MakeLocateArch $(<) ;
+	GetConfKeysGen1 $(1) : $(2) $(3) ;
+	LocalClean clean : $(<) ;
+}
+
+actions GetConfKeysGen1
+{
+	LC_ALL=C gawk -f $(2[2]) $(2[1]) > $(1)
+}
+
+GetConfKeysGen [ FGristFiles confstr.c ] : confstr.gperf : fake-gperf.awk ;
+GetConfKeysGen [ FGristFiles limits.c ] : limits.gperf : fake-gperf.awk ;
+GetConfKeysGen [ FGristFiles pathconf.c ] : pathconf.gperf : fake-gperf.awk ;
+GetConfKeysGen [ FGristFiles progenv.c ] : progenv.gperf : fake-gperf.awk ;
+GetConfKeysGen [ FGristFiles sysconf.c ] : sysconf.gperf : fake-gperf.awk ;
+
+BinCommand getconf :
+	getconf.c
+	confstr.c
+	limits.c
+	pathconf.c
+	progenv.c
+	sysconf.c
+	: libbsd.so
+	;
+
+

src/bin/getconf/Makefile

@@ -0,0 +1,37 @@
+# $FreeBSD$
+
+PROG=	getconf
+
+SRCS=	confstr.c getconf.c limits.c pathconf.c progenv.c sysconf.c
+CFLAGS+= -I${.CURDIR}
+CLEANFILES+=	confstr.c limits.c pathconf.c progenv.c sysconf.c \
+		confstr.names limits.names pathconf.names sysconf.names \
+		conflicting.names unique.names
+
+.SUFFIXES: .gperf .names
+.PHONY: conflicts
+
+all:	conflicts
+
+.gperf.c:
+	LC_ALL=C awk -f ${.CURDIR}/fake-gperf.awk ${.IMPSRC} >${.TARGET}
+
+.gperf.names:
+	LC_ALL=C awk '/^[_A-Z]/ { print; }' ${.IMPSRC} | \
+	    sed -e 's/,$$//' >${.TARGET}
+
+conflicts: conflicting.names unique.names
+	@if test `wc -l <conflicting.names` != `wc -l <unique.names`; then \
+		echo "Name conflicts found!" >&2; \
+		exit 1; \
+	fi
+
+# pathconf.names is not included here because pathconf names are
+# syntactically distinct from the other kinds.
+conflicting.names:	confstr.names limits.names sysconf.names
+	cat ${.ALLSRC} >${.TARGET}
+
+unique.names:		conflicting.names
+	LC_ALL=C sort -u ${.ALLSRC} >${.TARGET}
+
+.include <bsd.prog.mk>

src/bin/getconf/confstr.gperf

@@ -0,0 +1,70 @@
+%{
+/*
+ * 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);
+
+/*
+ * The Standard seems a bit ambiguous over whether the POSIX_V6_*
+ * are specified with or without a leading underscore, so we just
+ * use both.
+ */
+%}
+struct map { const char *name; int key; int valid; };
+%%
+PATH, _CS_PATH
+POSIX_V6_ILP32_OFF32_CFLAGS, _CS_POSIX_V6_ILP32_OFF32_CFLAGS
+POSIX_V6_ILP32_OFF32_LDFLAGS, _CS_POSIX_V6_ILP32_OFF32_LDFLAGS
+POSIX_V6_ILP32_OFF32_LIBS, _CS_POSIX_V6_ILP32_OFF32_LIBS
+POSIX_V6_ILP32_OFFBIG_CFLAGS, _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS
+POSIX_V6_ILP32_OFFBIG_LDFLAGS, _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS
+POSIX_V6_ILP32_OFFBIG_LIBS, _CS_POSIX_V6_ILP32_OFFBIG_LIBS
+POSIX_V6_LP64_OFF64_CFLAGS, _CS_POSIX_V6_LP64_OFF64_CFLAGS
+POSIX_V6_LP64_OFF64_LDFLAGS, _CS_POSIX_V6_LP64_OFF64_LDFLAGS
+POSIX_V6_LP64_OFF64_LIBS, _CS_POSIX_V6_LP64_OFF64_LIBS
+POSIX_V6_LPBIG_OFFBIG_CFLAGS, _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS
+POSIX_V6_LPBIG_OFFBIG_LDFLAGS, _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS
+POSIX_V6_LPBIG_OFFBIG_LIBS, _CS_POSIX_V6_LPBIG_OFFBIG_LIBS
+POSIX_V6_WIDTH_RESTRICTED_ENVS, _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS
+_POSIX_V6_ILP32_OFF32_CFLAGS, _CS_POSIX_V6_ILP32_OFF32_CFLAGS
+_POSIX_V6_ILP32_OFF32_LDFLAGS, _CS_POSIX_V6_ILP32_OFF32_LDFLAGS
+_POSIX_V6_ILP32_OFF32_LIBS, _CS_POSIX_V6_ILP32_OFF32_LIBS
+_POSIX_V6_ILP32_OFFBIG_CFLAGS, _CS_POSIX_V6_ILP32_OFFBIG_CFLAGS
+_POSIX_V6_ILP32_OFFBIG_LDFLAGS, _CS_POSIX_V6_ILP32_OFFBIG_LDFLAGS
+_POSIX_V6_ILP32_OFFBIG_LIBS, _CS_POSIX_V6_ILP32_OFFBIG_LIBS
+_POSIX_V6_LP64_OFF64_CFLAGS, _CS_POSIX_V6_LP64_OFF64_CFLAGS
+_POSIX_V6_LP64_OFF64_LDFLAGS, _CS_POSIX_V6_LP64_OFF64_LDFLAGS
+_POSIX_V6_LP64_OFF64_LIBS, _CS_POSIX_V6_LP64_OFF64_LIBS
+_POSIX_V6_LPBIG_OFFBIG_CFLAGS, _CS_POSIX_V6_LPBIG_OFFBIG_CFLAGS
+_POSIX_V6_LPBIG_OFFBIG_LDFLAGS, _CS_POSIX_V6_LPBIG_OFFBIG_LDFLAGS
+_POSIX_V6_LPBIG_OFFBIG_LIBS, _CS_POSIX_V6_LPBIG_OFFBIG_LIBS
+_POSIX_V6_WIDTH_RESTRICTED_ENVS, _CS_POSIX_V6_WIDTH_RESTRICTED_ENVS
+%%
+int
+find_confstr(const char *name, int *key)
+{
+	const struct map *rv;
+
+	rv = in_word_set(name);
+	if (rv != NULL) {
+		if (rv->valid) {
+			*key = rv->key;
+			return 1;
+		}
+		return -1;
+	}
+	return 0;
+}

src/bin/getconf/fake-gperf.awk

@@ -0,0 +1,66 @@
+#!/usr/bin/awk -f
+# $FreeBSD$
+BEGIN {
+  state = 0;
+  struct_seen = "";
+}
+/^%{$/ && state == 0 {
+  state = 1;
+  next;
+}
+/^%}$/ && state == 1 {
+  state = 0;
+  next;
+}
+state == 1 { print; next; }
+/^struct/ && state == 0 {
+  print;
+  struct_seen = $2;
+  next;
+}
+/^%%$/ && state == 0 {
+  state = 2;
+  if (struct_seen !~ /^$/) {
+    print "static const struct", struct_seen, "wordlist[] = {";
+  } else {
+    print "static const struct map {";
+    print "\tconst char *name;";
+    print "\tint key;";
+    print "\tint valid;";
+    print "} wordlist[] = {";
+    struct_seen = "map";
+  }
+  next;
+}
+/^%%$/ && state == 2 {
+  state = 3;
+  print "\t{ NULL, 0, 0 }";
+  print "};";
+  print "#define\tNWORDS\t(sizeof(wordlist)/sizeof(wordlist[0]) - 1)";
+  print "static const struct map *";
+  print "in_word_set(const char *word)";
+  print "{";
+  print "\tconst struct", struct_seen, "*mp;";
+  print "";
+  print "\tfor (mp = wordlist; mp < &wordlist[NWORDS]; mp++) {";
+  print "\t\tif (strcmp(word, mp->name) == 0)";
+  print "\t\t\treturn (mp);";
+  print "\t}";
+  print "\treturn (NULL);";
+  print "}";
+  print "";
+  next;
+}
+state == 2 && NF == 2 {
+  name = substr($1, 1, length($1) - 1);
+  printf "#ifdef %s\n", $2;
+  printf "\t{ \"%s\", %s, 1 },\n", name, $2;
+  print "#else";
+  printf "\t{ \"%s\", 0, 0 },\n", name, $2;
+  print "#endif"
+  next;
+}
+state == 3 { print; next; }
+{
+				# eat anything not matched.
+}

src/bin/getconf/getconf.1

@@ -0,0 +1,207 @@
+.\"
+.\" 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 September 18, 2002
+.Dt GETCONF 1
+.Os
+.Sh NAME
+.Nm getconf
+.Nd retrieve standard configuration variables
+.Sh SYNOPSIS
+.Nm
+.Op Fl v Ar environment
+.Ar path_var
+.Ar file
+.Nm
+.Op Fl v Ar environment
+.Ar system_var
+.Sh DESCRIPTION
+The
+.Nm
+utility prints the value of a
+.Tn POSIX
+or
+.Tn X/Open
+path or system configuration variable to 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 file system-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.
+As an extension, the second form can also be used to query static limits from
+.In limits.h .
+.Pp
+All
+.Xr sysconf 3
+and
+.Xr pathconf 2
+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 .
+Variables retrieved from
+.Xr confstr 3
+have the leading
+.Ql _CS_
+stripped off; thus,
+.Dv _CS_PATH
+is queried by a
+.Ar system_var
+of
+.Dq Li PATH .
+.Ss Programming Environments
+The
+.Fl v Ar environment
+option specifies a
+.St -p1003.1-2001
+programming environment under which the values are to be queried.
+This option currently does nothing, but may in the future be used
+to select between 32-bit and 64-bit execution environments on platforms
+which support both.
+Specifying an environment which is not supported on the current execution
+platform gives undefined results.
+.Pp
+The standard programming environments are as follows:
+.Bl -tag -width ".Li POSIX_V6_LPBIG_OFFBIG" -offset indent
+.It Li POSIX_V6_ILP32_OFF32
+Exactly 32-bit integer, long, pointer, and file offset.
+.Sy Supported platforms :
+None.
+.It Li POSIX_V6_ILP32_OFFBIG
+Exactly 32-bit integer, long, and pointer; at least 64-bit file offset.
+.Sy Supported platforms :
+.Tn IA32 ,
+.Tn PowerPC .
+.It Li POSIX_V6_LP64_OFF64
+Exactly 32-bit integer; exactly 64-bit long, pointer, and file offset.
+.Sy Supported platforms :
+.Tn Alpha ,
+.Tn SPARC64 .
+.It Li POSIX_V6_LPBIG_OFFBIG
+At least 32-bit integer; at least 64-bit long, pointer, and file offset.
+.Sy Supported platforms :
+None.
+.El
+.Pp
+The command:
+.Pp
+.Dl "getconf POSIX_V6_WIDTH_RESTRICTED_ENVS"
+.Pp
+returns a newline-separated list of environments in which the width
+of certain fundamental types is no greater than the width of the native
+C type
+.Vt long .
+At present, all programming environments supported by
+.Fx
+have this property.
+Several of the
+.Xr confstr 3
+variables provide information on the necessary compiler and linker flags
+to use the standard programming environments described above.
+.Sh EXIT STATUS
+.Ex -std
+.Sh EXAMPLES
+The command:
+.Pp
+.Dl "getconf PATH"
+.Pp
+will display the system default setting for the
+.Ev PATH
+environment variable.
+.Pp
+The command:
+.Pp
+.Dl "getconf NAME_MAX /tmp"
+.Pp
+will display the maximum length of a filename in the
+.Pa /tmp
+directory.
+.Pp
+The command:
+.Pp
+.Dl "getconf -v POSIX_V6_LPBIG_OFFBIG LONG_MAX"
+.Pp
+will display the maximum value of the C type
+.Vt long
+in the
+.Li POSIX_V6_LPBIG_OFFBIG
+programming environment,
+if the system supports that environment.
+.Sh DIAGNOSTICS
+Use of a
+.Ar system_var
+or
+.Ar path_var
+which is completely unrecognized 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.
+The
+.Nm
+utility recognizes all of the variables defined for
+.St -p1003.1-2001 ,
+including those which are not currently implemented.
+.Sh SEE ALSO
+.Xr pathconf 2 ,
+.Xr confstr 3 ,
+.Xr sysconf 3
+.Sh STANDARDS
+The
+.Nm
+utility is expected to be compliant with
+.St -p1003.1-2001 .
+.Sh HISTORY
+The
+.Nm
+utility first appeared in
+.Fx 5.0 .
+.Sh AUTHORS
+.An Garrett A. Wollman Aq [email protected]

src/bin/getconf/getconf.c

@@ -0,0 +1,190 @@
+/*
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#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: getconf [-v prog_env] system_var\n"
+"       getconf [-v prog_env] path_var pathname\n");
+	exit(EX_USAGE);
+}
+
+int
+main(int argc, char **argv)
+{
+	int c, key, valid;
+	const char *name, *vflag, *alt_path;
+	intmax_t limitval;
+
+	vflag = NULL;
+	while ((c = getopt(argc, argv, "v:")) != -1) {
+		switch (c) {
+		case 'v':
+			vflag = optarg;
+			break;
+
+		default:
+			usage();
+		}
+	}
+
+	if ((name = argv[optind]) == NULL)
+		usage();
+
+	if (vflag != NULL) {
+		if ((valid = find_progenv(vflag, &alt_path)) == 0)
+			errx(EX_USAGE, "invalid programming environment %s",
+			     vflag);
+		if (valid > 0 && alt_path != NULL) {
+			if (argv[optind + 1] == NULL)
+				execl(alt_path, "getconf", argv[optind],
+				      (char *)NULL);
+			else
+				execl(alt_path, "getconf", argv[optind],
+				      argv[optind + 1], (char *)NULL);
+
+			err(EX_OSERR, "execl: %s", alt_path);
+		}
+		if (valid < 0)
+			errx(EX_UNAVAILABLE, "environment %s is not available",
+			     vflag);
+	}
+
+	if (argv[optind + 1] == NULL) { /* confstr or sysconf */
+		if ((valid = find_limit(name, &limitval)) != 0) {
+			if (valid > 0)
+				printf("%" PRIdMAX "\n", limitval);
+			else
+				printf("undefined\n");
+
+			return 0;
+		}
+		if ((valid = find_confstr(name, &key)) != 0) {
+			if (valid > 0)
+				do_confstr(name, key);
+			else
+				printf("undefined\n");
+		} else {		
+			valid = find_sysconf(name, &key);
+			if (valid > 0) {
+				do_sysconf(name, key);
+			} else if (valid < 0) {
+				printf("undefined\n");
+			} else 
+				errx(EX_USAGE,
+				     "no such configuration parameter `%s'",
+				     name);
+		}
+	} else {
+		valid = find_pathconf(name, &key);
+		if (valid != 0) {
+			if (valid > 0)
+				do_pathconf(name, key, argv[optind + 1]);
+			else
+				printf("undefined\n");
+		} else
+			errx(EX_USAGE,
+			     "no such path configuration parameter `%s'",
+			     name);
+	}
+	return 0;
+}
+
+static void
+do_confstr(const char *name, int key)
+{
+	size_t len;
+	int savederr;
+
+	savederr = errno;
+	errno = 0;
+	len = confstr(key, 0, 0);
+	if (len == 0) {
+		if (errno)
+			err(EX_OSERR, "confstr: %s", name);
+		else
+			printf("undefined\n");
+	} else {
+		char buf[len + 1];
+
+		confstr(key, buf, len);
+		printf("%s\n", buf);
+	}
+	errno = savederr;
+}
+
+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
+		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
+		printf("%ld\n", value);
+}
+

src/bin/getconf/getconf.h

@@ -0,0 +1,43 @@
+/*
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifdef STABLE
+typedef long long intmax_t;
+#define	PRIdMAX	"lld"
+#else
+#include <inttypes.h>
+#endif
+
+int	find_confstr(const char *name, int *key);
+int	find_limit(const char *name, intmax_t *value);
+int	find_pathconf(const char *name, int *key);
+int	find_progenv(const char *name, const char **alt_path);
+int	find_sysconf(const char *name, int *key);

src/bin/getconf/limits.gperf

@@ -0,0 +1,118 @@
+%{
+/*
+ * Copyright is disclaimed as to the contents of this file.
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/types.h>
+
+#include <string.h>
+#include <limits.h>
+
+#include "getconf.h"
+
+/*
+ * Override gperf's built-in external scope.
+ */
+static const struct map *in_word_set(const char *str);
+
+%}
+struct map { const char *name; intmax_t value; int valid; };
+%%
+_POSIX_CLOCKRES_MIN, _POSIX_CLOCKRES_MIN
+_POSIX_AIO_LISTIO_MAX, _POSIX_AIO_LISTIO_MAX
+_POSIX_AIO_MAX, _POSIX_AIO_MAX
+_POSIX_ARG_MAX, _POSIX_ARG_MAX
+_POSIX_CHILD_MAX, _POSIX_CHILD_MAX
+_POSIX_DELAYTIMER_MAX, _POSIX_DELAYTIMER_MAX
+_POSIX_HOST_NAME_MAX, _POSIX_HOST_NAME_MAX
+_POSIX_LINK_MAX, _POSIX_LINK_MAX
+_POSIX_LOGIN_NAME_MAX, _POSIX_LOGIN_NAME_MAX
+_POSIX_MAX_CANON, _POSIX_MAX_CANON
+_POSIX_MAX_INPUT, _POSIX_MAX_INPUT
+_POSIX_MQ_OPEN_MAX, _POSIX_MQ_OPEN_MAX
+_POSIX_MQ_PRIO_MAX, _POSIX_MQ_PRIO_MAX
+_POSIX_NAME_MAX, _POSIX_NAME_MAX
+_POSIX_NGROUPS_MAX, _POSIX_NGROUPS_MAX
+_POSIX_OPEN_MAX, _POSIX_OPEN_MAX
+_POSIX_PATH_MAX, _POSIX_PATH_MAX
+_POSIX_PIPE_BUF, __POSIX_PIPE_BUF
+_POSIX_RE_DUP_MAX, _POSIX_RE_DUP_MAX
+_POSIX_RTSIG_MAX, _POSIX_RTSIG_MAX
+_POSIX_SEM_NSEMS_MAX, _POSIX_SEM_NSEMS_MAX
+_POSIX_SEM_VALUE_MAX, _POSIX_SEM_VALUE_MAX
+_POSIX_SIGQUEUE_MAX, _POSIX_SIGQUEUE_MAX
+_POSIX_SSIZE_MAX, _POSIX_SSIZE_MAX
+_POSIX_STREAM_MAX, _POSIX_STREAM_MAX
+_POSIX_SS_REPL_MAX, _POSIX_SS_REPL_MAX
+_POSIX_SYMLINK_MAX, _POSIX_SYMLINK_MAX
+_POSIX_SYMLOOP_MAX, _POSIX_SYMLOOP_MAX
+_POSIX_THREAD_DESTRUCTOR_ITERATIONS, _POSIX_THREAD_DESTRUCTOR_ITERATIONS
+_POSIX_THREAD_KEYS_MAX, _POSIX_THREAD_KEYS_MAX
+_POSIX_THREAD_THREADS_MAX, _POSIX_THREAD_THREADS_MAX
+_POSIX_TIMER_MAX, _POSIX_TIMER_MAX
+_POSIX_TRACE_EVENT_NAME_MAX, _POSIX_TRACE_EVENT_NAME_MAX
+_POSIX_TRACE_NAME_MAX, _POSIX_TRACE_NAME_MAX
+_POSIX_TRACE_SYS_MAX, _POSIX_TRACE_SYS_MAX
+_POSIX_TRACE_USER_EVENT_MAX, _POSIX_TRACE_USER_EVENT_MAX
+_POSIX_TTY_NAME_MAX, _POSIX_TTY_NAME_MAX
+_POSIX_TZNAME_MAX, _POSIX_TZNAME_MAX
+_POSIX2_BC_BASE_MAX, _POSIX2_BC_BASE_MAX
+_POSIX2_BC_DIM_MAX, _POSIX2_BC_DIM_MAX
+_POSIX2_BC_SCALE_MAX, _POSIX2_BC_SCALE_MAX
+_POSIX2_BC_STRING_MAX, _POSIX2_BC_STRING_MAX
+_POSIX2_CHARCLASS_NAME_MAX, _POSIX2_CHARCLASS_NAME_MAX
+_POSIX2_COLL_WEIGHTS_MAX, _POSIX2_COLL_WEIGHTS_MAX
+_POSIX2_EXPR_NEXT_MAX, _POSIX2_EXPR_NEST_MAX
+_POSIX2_LINE_MAX, _POSIX2_LINE_MAX
+_POSIX2_RE_DUP_MAX, _POSIX2_RE_DUP_MAX
+_XOPEN_IOV_MAX, _XOPEN_IOV_MAX
+_XOPEN_NAME_MAX, _XOPEN_NAME_MAX
+_XOPEN_PATH_MAX, _XOPEN_PATH_MAX
+CHAR_BIT, CHAR_BIT
+CHAR_MAX, CHAR_MAX
+CHAR_MIN, CHAR_MIN
+INT_MAX, INT_MAX
+INT_MIN, INT_MIN
+LLONG_MIN, LLONG_MIN
+LLONG_MAX, LLONG_MAX
+LONG_BIT, LONG_BIT
+LONG_MAX, LONG_MAX
+LONG_MIN, LONG_MIN
+MB_LEN_MAX, MB_LEN_MAX
+SCHAR_MAX, SCHAR_MAX
+SCHAR_MIN, SCHAR_MIN
+SHRT_MAX, SHRT_MAX
+SHRT_MIN, SHRT_MIN
+SSIZE_MAX, SSIZE_MAX
+UCHAR_MAX, UCHAR_MAX
+UINT_MAX, UINT_MAX
+ULLONG_MAX, ULLONG_MAX
+ULONG_MAX, ULONG_MAX
+USHRT_MAX, USHRT_MAX
+WORD_BIT, WORD_BIT
+CHARCLASS_NAME_MAX, CHARCLASS_NAME_MAX
+NL_ARGMAX, NL_ARGMAX
+ML_LANGMAX, NL_LANGMAX
+NL_MSGMAX, NL_MSGMAX
+NL_NMAX, NL_NMAX
+NL_SETMAX, NL_SETMAX
+NL_TEXTMAX, NL_TEXTMAX
+NZERO, NZERO
+%%
+int
+find_limit(const char *name, intmax_t *value)
+{
+	const struct map *rv;
+
+	rv = in_word_set(name);
+	if (rv != NULL) {
+		if (rv->valid) {
+			*value = rv->value;
+			return 1;
+		}
+		return -1;
+	}
+	return 0;
+}

src/bin/getconf/pathconf.gperf

@@ -0,0 +1,62 @@
+%{
+/*
+ * 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);
+
+%}
+struct map { const char *name; int key; int valid; };
+%%
+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_ALLOC_SIZE_MIN, _PC_ALLOC_SIZE_MIN
+POSIX_REC_INCR_XFER_SIZE, _PC_REC_INCR_XFER_SIZE
+POSIX_REC_MAX_XFER_SIZE, _PC_REC_MAX_XFER_SIZE
+POSIX_REC_MIN_XFER_SIZE, _PC_REC_MIN_XFER_SIZE
+POSIX_REC_XFER_ALIGN, _PC_REC_XFER_ALIGN
+SYMLINK_MAX, _PC_SYMLINK_MAX
+TRUSTEDBSD_ACL_EXTENDED, _PC_ACL_EXTENDED
+TRUSTEDBSD_ACL_PATH_MAX, _PC_ACL_PATH_MAX
+TRUSTEDBSD_CAP_PRESENT, _PC_CAP_PRESENT
+TRUSTEDBSD_INF_PRESENT, _PC_INF_PRESENT
+TRUSTEDBSD_MAC_PRESENT, _PC_MAC_PRESENT
+_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, int *key)
+{
+	const struct map *rv;
+
+	rv = in_word_set(name);
+	if (rv != NULL) {
+		if (rv->valid) {
+			*key = rv->key;
+			return 1;
+		}
+		return -1;
+	}
+	return 0;
+}

src/bin/getconf/progenv.gperf

@@ -0,0 +1,67 @@
+%{
+/*
+ * 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);
+
+/*
+ * The Standard seems a bit ambiguous over whether the POSIX_V6_*
+ * are specified with or without a leading underscore, so we just
+ * use both.
+ */
+/*
+ * The alt_path member gives the path containing another `getconf'
+ * executable which was compiled using the specified programming
+ * environment.  If it is NULL, the current executable is good enough.
+ * If we ever support multiple environments, this table will need to
+ * be updated.  (We cheat here and define the supported environments
+ * statically.)
+ */
+#if defined(__alpha__) || defined(__sparc64__) || defined(__amd64__)
+#define	have_LP64_OFF64		NULL
+#endif
+
+#if defined(__i386__) || defined(__powerpc__)
+#define	have_ILP32_OFFBIG	NULL
+#endif
+
+%}
+struct map { const char *name; const char *alt_path; int valid; };
+%%
+POSIX_V6_ILP32_OFF32, notdef
+POSIX_V6_ILP32_OFFBIG, have_ILP32_OFFBIG
+POSIX_V6_LP64_OFF64, have_LP64_OFF64
+POSIX_V6_LPBIG_OFFBIG, notdef
+_POSIX_V6_ILP32_OFF32, notdef
+_POSIX_V6_ILP32_OFFBIG, have_ILP32_OFFBIG
+_POSIX_V6_LP64_OFF64, have_LP64_OFF64
+_POSIX_V6_LPBIG_OFFBIG, notdef
+%%
+int
+find_progenv(const char *name, const char **alt_path)
+{
+	const struct map *rv;
+
+	rv = in_word_set(name);
+	if (rv != NULL) {
+		if (rv->valid) {
+			*alt_path = rv->alt_path;
+			return 1;
+		}
+		return -1;
+	}
+	return 0;
+}

src/bin/getconf/sysconf.gperf

@@ -0,0 +1,149 @@
+%{
+/*
+ * 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);
+
+%}
+struct map { const char *name; int key; int valid; };
+%%
+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
+GETGR_R_SIZE_MAX, _SC_GETGR_R_SIZE_MAX
+GETPW_R_SIZE_MAX, _SC_GETPW_R_SIZE_MAX
+HOST_NAME_MAX, _SC_HOST_NAME_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
+NPROCESSORS_CONF, _SC_NPROCESSORS_CONF
+NPROCESSORS_ONLN, _SC_NPROCESSORS_ONLN
+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
+SYMLOOP_MAX, _SC_SYMLOOP_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_BARRIERS, _SC_BARRIERS
+_POSIX_CLOCK_SELECTION, _SC_CLOCK_SELECTION
+_POSIX_CPUTIME, _SC_CPUTIME
+_POSIX_FILE_LOCKING, _SC_FILE_LOCKING
+_POSIX_FSYNC, _SC_FSYNC 
+_POSIX_IPV6, _SC_IPV6
+_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_MONOTONIC_CLOCK, _SC_MONOTONIC_CLOCK
+_POSIX_PRIORITIZED_IO, _SC_PRIORITIZED_IO 
+_POSIX_PRIORITY_SCHEDULING, _SC_PRIORITY_SCHEDULING 
+_POSIX_READER_WRITER_LOCKS, _SC_READER_WRITER_LOCKS
+_POSIX_REALTIME_SIGNALS, _SC_REALTIME_SIGNALS 
+_POSIX_REGEXP, _SC_REGEXP
+_POSIX_SAVED_IDS, _SC_SAVED_IDS
+_POSIX_SEMAPHORES, _SC_SEMAPHORES 
+_POSIX_SHARED_MEMORY_OBJECTS, _SC_SHARED_MEMORY_OBJECTS 
+_POSIX_SHELL, _SC_SHELL
+_POSIX_SPAWN, _SC_SPAWN
+_POSIX_SPIN_LOCKS, _SC_SPIN_LOCKS
+_POSIX_SPORADIC_SERVER, _SC_SPORADIC_SERVER
+_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_CPUTIME, _SC_THREAD_CPUTIME
+_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_THREAD_SPORADIC_SERVER, _SC_THREAD_SPORADIC_SERVER
+_POSIX_TIMEOUTS, _SC_TIMEOUTS
+_POSIX_TRACE, _SC_TRACE
+_POSIX_TRACE_EVENT_FILTER, _SC_TRACE_EVENT_FILTER
+_POSIX_TRACE_INHERIT, _SC_TRACE_INHERIT
+_POSIX_TRACE_LOG, _SC_TRACE_LOG
+_POSIX_TIMERS, _SC_TIMERS
+_POSIX_TYPED_MEMORY_OBJECTS, _SC_TYPED_MEMORY_OBJECTS
+_POSIX_VERSION, _SC_VERSION
+_POSIX_V6_ILP32_OFF32, _SC_V6_ILP32_OFF32
+_POSIX_V6_ILP32_OFFBIG, _SC_V6_ILP32_OFFBIG
+_POSIX_V6_LP64_OFF64, _SC_V6_LP64_OFF64
+_POSIX_V6_LP64_OFFBIG, _SC_V6_LP64_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, int *key)
+{
+	const struct map *rv;
+
+	rv = in_word_set(name);
+	if (rv != NULL) {
+		if (rv->valid) {
+			*key = rv->key;
+			return 1;
+		}
+		return -1;
+	}
+	return 0;
+}