1 files changed, 323 insertions, 0 deletions

diff --git a/main/musl/getconf.c b/main/musl/getconf.c
new file mode 100644
index 000000000..67b894f86
--- /dev/null
+++ b/main/musl/getconf.c
@@ -0,0 +1,323 @@
+/*-
+ * Copyright (c) 1996, 1998 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by J.T. Conklin.
+ *
+ * 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.
+ */
+
+/* Fixed to be used with musl in Alpine Linux by Timo Teräs. */
+
+#include <err.h>
+#include <errno.h>
+#include <limits.h>
+#include <locale.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+struct conf_variable
+{
+  const char *name;
+  enum { SYSCONF, CONFSTR, PATHCONF, CONSTANT } type;
+  long value;
+};
+
+static const struct conf_variable conf_table[] =
+{
+  { "PATH",			CONFSTR,	_CS_PATH		},
+
+  /* Utility Limit Minimum Values */
+  { "POSIX2_BC_BASE_MAX",	CONSTANT,	_POSIX2_BC_BASE_MAX	},
+  { "POSIX2_BC_DIM_MAX",	CONSTANT,	_POSIX2_BC_DIM_MAX	},
+  { "POSIX2_BC_SCALE_MAX",	CONSTANT,	_POSIX2_BC_SCALE_MAX	},
+  { "POSIX2_BC_STRING_MAX",	CONSTANT,	_POSIX2_BC_STRING_MAX	},
+  { "POSIX2_COLL_WEIGHTS_MAX",	CONSTANT,	_POSIX2_COLL_WEIGHTS_MAX },
+  { "POSIX2_EXPR_NEST_MAX",	CONSTANT,	_POSIX2_EXPR_NEST_MAX	},
+  { "POSIX2_LINE_MAX",		CONSTANT,	_POSIX2_LINE_MAX	},
+  { "POSIX2_RE_DUP_MAX",	CONSTANT,	_POSIX2_RE_DUP_MAX	},
+  { "POSIX2_VERSION",		CONSTANT,	_POSIX2_VERSION		},
+
+  /* POSIX.1 Minimum Values */
+  { "_POSIX_AIO_LISTIO_MAX",	CONSTANT,	_POSIX_AIO_LISTIO_MAX	},
+  { "_POSIX_AIO_MAX",		CONSTANT,       _POSIX_AIO_MAX		},
+  { "_POSIX_ARG_MAX",		CONSTANT,	_POSIX_ARG_MAX		},
+  { "_POSIX_CHILD_MAX",		CONSTANT,	_POSIX_CHILD_MAX	},
+  { "_POSIX_LINK_MAX",		CONSTANT,	_POSIX_LINK_MAX		},
+  { "_POSIX_MAX_CANON",		CONSTANT,	_POSIX_MAX_CANON	},
+  { "_POSIX_MAX_INPUT",		CONSTANT,	_POSIX_MAX_INPUT	},
+  { "_POSIX_MQ_OPEN_MAX",	CONSTANT,	_POSIX_MQ_OPEN_MAX	},
+  { "_POSIX_MQ_PRIO_MAX",	CONSTANT,	_POSIX_MQ_PRIO_MAX	},
+  { "_POSIX_NAME_MAX",		CONSTANT,	_POSIX_NAME_MAX		},
+  { "_POSIX_NGROUPS_MAX",	CONSTANT,	_POSIX_NGROUPS_MAX	},
+  { "_POSIX_OPEN_MAX",		CONSTANT,	_POSIX_OPEN_MAX		},
+  { "_POSIX_PATH_MAX",		CONSTANT,	_POSIX_PATH_MAX		},
+  { "_POSIX_PIPE_BUF",		CONSTANT,	_POSIX_PIPE_BUF		},
+  { "_POSIX_SSIZE_MAX",		CONSTANT,	_POSIX_SSIZE_MAX	},
+  { "_POSIX_STREAM_MAX",	CONSTANT,	_POSIX_STREAM_MAX	},
+  { "_POSIX_TZNAME_MAX",	CONSTANT,	_POSIX_TZNAME_MAX	},
+
+  /* Symbolic Utility Limits */
+  { "BC_BASE_MAX",		SYSCONF,	_SC_BC_BASE_MAX		},
+  { "BC_DIM_MAX",		SYSCONF,	_SC_BC_DIM_MAX		},
+  { "BC_SCALE_MAX",		SYSCONF,	_SC_BC_SCALE_MAX	},
+  { "BC_STRING_MAX",		SYSCONF,	_SC_BC_STRING_MAX	},
+  { "COLL_WEIGHTS_MAX",		SYSCONF,	_SC_COLL_WEIGHTS_MAX	},
+  { "EXPR_NEST_MAX",		SYSCONF,	_SC_EXPR_NEST_MAX	},
+  { "LINE_MAX",			SYSCONF,	_SC_LINE_MAX		},
+  { "RE_DUP_MAX",		SYSCONF,	_SC_RE_DUP_MAX		},
+
+  /* Optional Facility Configuration Values */
+  { "_POSIX2_C_BIND",		SYSCONF,	_SC_2_C_BIND		},
+  { "POSIX2_C_DEV",		SYSCONF,	_SC_2_C_DEV		},
+  { "POSIX2_CHAR_TERM",		SYSCONF,	_SC_2_CHAR_TERM		},
+  { "POSIX2_FORT_DEV",		SYSCONF,	_SC_2_FORT_DEV		},
+  { "POSIX2_FORT_RUN",		SYSCONF,	_SC_2_FORT_RUN		},
+  { "POSIX2_LOCALEDEF",		SYSCONF,	_SC_2_LOCALEDEF		},
+  { "POSIX2_SW_DEV",		SYSCONF,	_SC_2_SW_DEV		},
+  { "POSIX2_UPE",		SYSCONF,	_SC_2_UPE		},
+
+  /* POSIX.1 Configurable System Variables */
+  { "AIO_LISTIO_MAX",		SYSCONF,	_SC_AIO_LISTIO_MAX	},
+  { "AIO_MAX",			SYSCONF,	_SC_AIO_MAX		},
+  { "ARG_MAX",			SYSCONF,	_SC_ARG_MAX 		},
+  { "CHILD_MAX",		SYSCONF,	_SC_CHILD_MAX		},
+  { "CLK_TCK",			SYSCONF,	_SC_CLK_TCK		},
+  { "MQ_OPEN_MAX",		SYSCONF,	_SC_MQ_OPEN_MAX		},
+  { "MQ_PRIO_MAX",		SYSCONF,	_SC_MQ_PRIO_MAX		},
+  { "NGROUPS_MAX",		SYSCONF,	_SC_NGROUPS_MAX		},
+  { "OPEN_MAX",			SYSCONF,	_SC_OPEN_MAX		},
+  { "STREAM_MAX",		SYSCONF,	_SC_STREAM_MAX		},
+  { "TZNAME_MAX",		SYSCONF,	_SC_TZNAME_MAX		},
+  { "_POSIX_JOB_CONTROL",	SYSCONF,	_SC_JOB_CONTROL 	},
+  { "_POSIX_SAVED_IDS",		SYSCONF,	_SC_SAVED_IDS		},
+  { "_POSIX_VERSION",		SYSCONF,	_SC_VERSION		},
+
+  { "LINK_MAX",			PATHCONF,	_PC_LINK_MAX		},
+  { "MAX_CANON",		PATHCONF,	_PC_MAX_CANON		},
+  { "MAX_INPUT",		PATHCONF,	_PC_MAX_INPUT		},
+  { "NAME_MAX",			PATHCONF,	_PC_NAME_MAX		},
+  { "PATH_MAX",			PATHCONF,	_PC_PATH_MAX		},
+  { "PIPE_BUF",			PATHCONF,	_PC_PIPE_BUF		},
+  { "_POSIX_CHOWN_RESTRICTED",	PATHCONF,	_PC_CHOWN_RESTRICTED	},
+  { "_POSIX_NO_TRUNC",		PATHCONF,	_PC_NO_TRUNC		},
+  { "_POSIX_VDISABLE",		PATHCONF,	_PC_VDISABLE		},
+
+  /* POSIX.1b Configurable System Variables */
+  { "PAGESIZE",			SYSCONF,	_SC_PAGESIZE		},
+  { "_POSIX_ASYNCHRONOUS_IO",	SYSCONF,	_SC_ASYNCHRONOUS_IO	},
+  { "_POSIX_FSYNC",		SYSCONF,	_SC_FSYNC		},
+  { "_POSIX_MAPPED_FILES",	SYSCONF,	_SC_MAPPED_FILES	},
+  { "_POSIX_MEMLOCK",		SYSCONF,	_SC_MEMLOCK		},
+  { "_POSIX_MEMLOCK_RANGE",	SYSCONF,	_SC_MEMLOCK_RANGE	},
+  { "_POSIX_MEMORY_PROTECTION",	SYSCONF,	_SC_MEMORY_PROTECTION	},
+  { "_POSIX_MESSAGE_PASSING",	SYSCONF,	_SC_MESSAGE_PASSING	},
+  { "_POSIX_MONOTONIC_CLOCK",	SYSCONF,	_SC_MONOTONIC_CLOCK	},
+  { "_POSIX_PRIORITY_SCHEDULING", SYSCONF,	_SC_PRIORITY_SCHEDULING },
+  { "_POSIX_SEMAPHORES",	SYSCONF,	_SC_SEMAPHORES		},
+  { "_POSIX_SHARED_MEMORY_OBJECTS", SYSCONF,	_SC_SHARED_MEMORY_OBJECTS },
+  { "_POSIX_SYNCHRONIZED_IO",	SYSCONF,	_SC_SYNCHRONIZED_IO	},
+  { "_POSIX_TIMERS",		SYSCONF,	_SC_TIMERS		},
+
+  { "_POSIX_SYNC_IO",		PATHCONF,	_PC_SYNC_IO		},
+
+  /* POSIX.1c Configurable System Variables */
+  { "LOGIN_NAME_MAX",		SYSCONF,	_SC_LOGIN_NAME_MAX	},
+  { "_POSIX_THREADS",		SYSCONF,	_SC_THREADS		},
+
+  /* POSIX.1j Configurable System Variables */
+  { "_POSIX_BARRIERS",		SYSCONF,	_SC_BARRIERS		},
+  { "_POSIX_READER_WRITER_LOCKS", SYSCONF,	_SC_READER_WRITER_LOCKS	},
+  { "_POSIX_SPIN_LOCKS",	SYSCONF,	_SC_SPIN_LOCKS		},
+
+  /* XPG4.2 Configurable System Variables */
+  { "IOV_MAX",			SYSCONF,	_SC_IOV_MAX		},
+  { "PAGE_SIZE",		SYSCONF,	_SC_PAGE_SIZE		},
+  { "_XOPEN_SHM",		SYSCONF,	_SC_XOPEN_SHM		},
+
+  /* X/Open CAE Spec. Issue 5 Version 2 Configurable System Variables */
+  { "FILESIZEBITS",		PATHCONF,	_PC_FILESIZEBITS	},
+
+  /* POSIX.1-2001 XSI Option Group Configurable System Variables */
+  { "ATEXIT_MAX",		SYSCONF,	_SC_ATEXIT_MAX		},
+
+  /* POSIX.1-2001 TSF Configurable System Variables */
+  { "GETGR_R_SIZE_MAX",		SYSCONF,	_SC_GETGR_R_SIZE_MAX	},
+  { "GETPW_R_SIZE_MAX",		SYSCONF,	_SC_GETPW_R_SIZE_MAX	},
+
+  /* Commonly provided extensions */
+  { "_NPROCESSORS_CONF",	SYSCONF,	_SC_NPROCESSORS_CONF	},
+  { "_NPROCESSORS_ONLN",	SYSCONF,	_SC_NPROCESSORS_ONLN	},
+
+  { NULL, CONSTANT, 0L }
+};
+
+static int a_flag = 0;		/* list all variables */
+
+static void usage(const char *p)
+{
+	(void)fprintf(stderr, "Usage: %s system_var\n\t%s -a\n"
+	    "\t%s path_var pathname\n\t%s -a pathname\n", p, p, p, p);
+	exit(EXIT_FAILURE);
+}
+
+static void print_longvar(const char *name, long value)
+{
+	if (a_flag)
+		(void)printf("%s = %ld\n", name, value);
+	else
+		(void)printf("%ld\n", value);
+}
+
+static void print_strvar(const char *name, const char *sval)
+{
+	if (a_flag)
+		(void)printf("%s = %s\n", name, sval);
+	else
+		(void)printf("%s\n", sval);
+}
+
+static void
+printvar(const struct conf_variable *cp, const char *pathname)
+{
+	size_t slen;
+	char *sval;
+	long val;
+
+	switch (cp->type) {
+	case CONSTANT:
+		print_longvar(cp->name, cp->value);
+		break;
+
+	case CONFSTR:
+		errno = 0;
+		slen = confstr((int)cp->value, NULL, 0);
+		if (slen == 0) {
+			if (errno != 0)
+out:			 	err(EXIT_FAILURE, "confstr(%ld)", cp->value);
+			else
+				print_strvar(cp->name, "undefined");
+		}
+
+		if ((sval = malloc(slen)) == NULL)
+			err(EXIT_FAILURE, "Can't allocate %zu bytes", slen);
+
+		errno = 0;
+		if (confstr((int)cp->value, sval, slen) == 0) {
+			if (errno != 0)
+				goto out;
+			else
+				print_strvar(cp->name, "undefined");
+		} else
+			print_strvar(cp->name, sval);
+
+		free(sval);
+		break;
+
+	case SYSCONF:
+		errno = 0;
+		if ((val = sysconf((int)cp->value)) == -1) {
+			if (errno != 0)
+				err(EXIT_FAILURE, "sysconf(%ld)", cp->value);
+			print_strvar(cp->name, "undefined");
+		} else
+			print_longvar(cp->name, val);
+		break;
+
+	case PATHCONF:
+		errno = 0;
+		if ((val = pathconf(pathname, (int)cp->value)) == -1) {
+			if (errno != 0) {
+				if (a_flag && errno == EINVAL) {
+					/* Just skip invalid variables */
+					return;
+				}
+				err(EXIT_FAILURE, "pathconf(%s, %ld)",
+				    pathname, cp->value);
+				/* NOTREACHED */
+			}
+
+			print_strvar(cp->name, "undefined");
+		} else
+			print_longvar(cp->name, val);
+		break;
+	}
+}
+
+int
+main(int argc, char **argv)
+{
+	int ch;
+	const char *progname = argv[0];
+	const struct conf_variable *cp;
+	const char *varname, *pathname;
+	int found;
+
+	(void)setlocale(LC_ALL, "");
+
+	while ((ch = getopt(argc, argv, "a")) != -1) {
+		switch (ch) {
+		case 'a':
+			a_flag = 1;
+			break;
+		case '?':
+		default:
+			usage(progname);
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+	if (!a_flag) {
+		if (argc == 0)
+			usage(progname);
+		varname = argv[0];
+		argc--;
+		argv++;
+	} else
+		varname = NULL;
+
+	if (argc > 1)
+		usage(progname);
+	pathname = argv[0];	/* may be NULL */
+
+	found = 0;
+	for (cp = conf_table; cp->name != NULL; cp++) {
+		if (a_flag || strcmp(varname, cp->name) == 0) {
+			if ((cp->type == PATHCONF) == (pathname != NULL)) {
+				printvar(cp, pathname);
+				found = 1;
+			} else if (!a_flag)
+				errx(EXIT_FAILURE,
+				    "%s: invalid variable type", cp->name);
+		}
+	}
+
+	if (!a_flag && !found)
+		errx(EXIT_FAILURE, "%s: unknown variable", varname);
+
+	(void)fflush(stdout);
+	return ferror(stdout) ? EXIT_FAILURE : EXIT_SUCCESS;
+}