Import macOS userland

adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106

2 files changed, 230 insertions, 0 deletions

diff --git a/shell_cmds/pwd/pwd.1 b/shell_cmds/pwd/pwd.1
new file mode 100644
index 0000000..929c4b3
--- /dev/null
+++ b/shell_cmds/pwd/pwd.1
@@ -0,0 +1,103 @@
+.\"-
+.\" Copyright (c) 1990, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the Institute of Electrical and Electronics Engineers, Inc.
+.\"
+.\" 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.
+.\" 4. 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.
+.\"
+.\"     @(#)pwd.1	8.2 (Berkeley) 4/28/95
+.\" $FreeBSD: src/bin/pwd/pwd.1,v 1.26 2005/01/16 16:41:58 ru Exp $
+.\"
+.Dd April 12, 2003
+.Dt PWD 1
+.Os
+.Sh NAME
+.Nm pwd
+.Nd return working directory name
+.Sh SYNOPSIS
+.Nm
+.Op Fl L | P
+.Sh DESCRIPTION
+The
+.Nm
+utility writes the absolute pathname of the current working directory to
+the standard output.
+.Pp
+Some shells may provide a builtin
+.Nm
+command which is similar or identical to this utility.
+Consult the
+.Xr builtin 1
+manual page.
+.Pp
+The options are as follows:
+.Bl -tag -width indent
+.It Fl L
+Display the logical current working directory.
+.It Fl P
+Display the physical current working directory (all symbolic links resolved).
+.El
+.Pp
+If no options are specified, the
+.\" 4207130
+.Fl L
+option is assumed.
+.Sh ENVIRONMENT
+Environment variables used by
+.Nm :
+.Bl -tag -width ".Ev PWD"
+.It Ev PWD
+Logical current working directory.
+.El
+.Sh EXIT STATUS
+.Ex -std
+.Sh SEE ALSO
+.Xr builtin 1 ,
+.Xr cd 1 ,
+.Xr csh 1 ,
+.Xr sh 1 ,
+.Xr getcwd 3
+.Sh STANDARDS
+The
+.Nm
+utility conforms to
+.St -p1003.1-2001 .
+.Sh BUGS
+In
+.Xr csh 1
+the command
+.Ic dirs
+is always faster because it is built into that shell.
+However, it can give a different answer in the rare case
+that the current directory or a containing directory was moved after
+the shell descended into it.
+.Pp
+The
+.Fl L
+option does not work unless the
+.Ev PWD
+environment variable is exported by the shell.
diff --git a/shell_cmds/pwd/pwd.c b/shell_cmds/pwd/pwd.c
new file mode 100644
index 0000000..c5788b1
--- /dev/null
+++ b/shell_cmds/pwd/pwd.c
@@ -0,0 +1,127 @@
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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.
+ * 4. 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.
+ */
+
+#if 0
+#ifndef lint
+static char const copyright[] =
+"@(#) Copyright (c) 1991, 1993, 1994\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)pwd.c	8.3 (Berkeley) 4/1/94";
+#endif /* not lint */
+#endif
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/bin/pwd/pwd.c,v 1.25 2005/02/09 17:37:38 ru Exp $");
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <err.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+static char *getcwd_logical(void);
+void usage(void);
+
+int
+main(int argc, char *argv[])
+{
+	int physical;
+	int ch;
+	char *p;
+
+	// 4207130
+	physical = 0;
+	while ((ch = getopt(argc, argv, "LP")) != -1)
+		switch (ch) {
+		case 'L':
+			physical = 0;
+			break;
+		case 'P':
+			physical = 1;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (argc != 0)
+		usage();
+
+	/*
+	 * If we're trying to find the logical current directory and that
+	 * fails, behave as if -P was specified.
+	 *
+	 * 4701537: Only fall back if $PWD was actually wrong. We want to
+	 * fail if the path is too long (errno == ENAMETOOLONG).
+	 */
+	if ((!physical && (p = getcwd_logical()) != NULL) ||
+	    ((physical || errno == ENOENT) && (p = getcwd(NULL, 0)) != NULL))
+		printf("%s\n", p);
+	else
+		err(1, ".");
+
+	exit(0);
+}
+
+void
+usage(void)
+{
+
+	(void)fprintf(stderr, "usage: pwd [-L | -P]\n");
+  	exit(1);
+}
+
+static char *
+getcwd_logical(void)
+{
+	struct stat lg, phy;
+	char *pwd;
+
+	/*
+	 * Check that $PWD is an absolute logical pathname referring to
+	 * the current working directory.
+	 */
+	if ((pwd = getenv("PWD")) != NULL && *pwd == '/') {
+		if (stat(pwd, &lg) == -1 || stat(".", &phy) == -1)
+			return (NULL);
+		if (lg.st_dev == phy.st_dev && lg.st_ino == phy.st_ino)
+			return (pwd);
+	}
+
+	errno = ENOENT;
+	return (NULL);
+}