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, 280 insertions, 0 deletions

diff --git a/shell_cmds/chroot/chroot.8 b/shell_cmds/chroot/chroot.8
new file mode 100644
index 0000000..fce026b
--- /dev/null
+++ b/shell_cmds/chroot/chroot.8
@@ -0,0 +1,102 @@
+.\" Copyright (c) 1988, 1991, 1993
+.\"	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.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 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.
+.\"
+.\"     from: @(#)chroot.8	8.1 (Berkeley) 6/9/93
+.\"	$NetBSD: chroot.8,v 1.7 1998/10/06 03:47:50 mrg Exp $
+.\"
+.Dd October 6, 1998
+.Dt CHROOT 8
+.Os BSD 4.3
+.Sh NAME
+.Nm chroot
+.Nd change root directory
+.Sh SYNOPSIS
+.Nm
+.Op Fl u user
+.Op Fl g group
+.Op Fl G group,group,...
+.Ar newroot
+.Op Ar command
+.Sh DESCRIPTION
+The
+.Nm
+command changes its root directory to the supplied directory
+.Ar newroot
+and exec's
+.Ar command ,
+if supplied, or an interactive copy of your shell.
+.Pp
+If the
+.Fl u ,
+.Fl g
+or
+.Fl G
+options are given, the user, group and group list of the process are
+set to these values after the chroot has taken place.  See
+.Xr setgid 2 ,
+.Xr setgroups 2 ,
+.Xr setuid 2 ,
+.Xr getgrnam 3
+and
+.Xr getpwnam 3 .
+.Pp
+Note,
+.Ar command
+or the shell are run as your real-user-id.
+.Sh ENVIRONMENT
+The following environment variable is referenced by
+.Nm :
+.Bl -tag -width SHELL
+.It Ev SHELL
+If set,
+the string specified by
+.Ev SHELL
+is interpreted as the name of
+the shell to exec.
+If the variable
+.Ev SHELL
+is not set,
+.Pa /bin/sh
+is used.
+.El
+.Sh SEE ALSO
+.Xr chdir 2 ,
+.Xr chroot 2 ,
+.Xr environ 7
+.Sh HISTORY
+The
+.Nm
+utility first appeared in
+.Bx 4.4 .
+.Sh SECURITY CONSIDERATIONS
+.Nm
+should never be installed setuid root, as it would then be possible
+to exploit the program to gain root privileges.
diff --git a/shell_cmds/chroot/chroot.c b/shell_cmds/chroot/chroot.c
new file mode 100644
index 0000000..c9c38f5
--- /dev/null
+++ b/shell_cmds/chroot/chroot.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 1988, 1993
+ *	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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+#ifndef lint
+__COPYRIGHT("@(#) Copyright (c) 1988, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n");
+#endif /* not lint */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)chroot.c	8.1 (Berkeley) 6/9/93";
+#else
+__RCSID("$NetBSD: chroot.c,v 1.7 1998/10/06 03:47:51 mrg Exp $");
+#endif
+#endif /* not lint */
+
+#include <sys/param.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <grp.h>
+#include <paths.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+int	main __P((int, char **));
+void	usage __P((void)) __attribute__((__noreturn__));
+
+char	*user;		/* user to switch to before running program */
+char	*group;		/* group to switch to ... */
+char	*grouplist;	/* group list to switch to ... */
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	struct group *gp;
+	struct passwd *pw;
+	char *shell, *endp, *comma;
+	gid_t gid = 0, gidlist[NGROUPS_MAX];
+	uid_t uid = 0;
+	int ch, gids;
+
+	while ((ch = getopt(argc, argv, "G:g:u:")) != -1)
+		switch(ch) {
+		case 'u':
+			user = optarg;
+			break;
+		case 'g':
+			group = optarg;
+			break;
+		case 'G':
+			grouplist = optarg;
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	if (argc < 1)
+		usage();
+
+	if (group) {
+		if (isdigit(*group)) {
+			gid = (gid_t)strtol(group, &endp, 0);
+			if (endp == group)
+				goto getgroup;
+		} else {
+getgroup:
+			if ((gp = getgrnam(group)))
+				gid = gp->gr_gid;
+			else
+				errx(1, "no such group %s", group);
+		}
+	}
+
+	for (gids = 0; grouplist; ) {
+		comma = strchr(grouplist, ',');
+
+		if (comma)
+			*comma++ = '\0';
+
+		if (isdigit(*grouplist)) {
+			gidlist[gids] = (gid_t)strtol(grouplist, &endp, 0);
+			if (endp == grouplist)
+				goto getglist;
+		} else {
+getglist:
+			if ((gp = getgrnam(grouplist)))
+				gidlist[gids] = gp->gr_gid;
+			else
+				errx(1, "no such group %s", group);
+		}
+		gids++;
+		grouplist = comma;
+	}
+
+	if (user) {
+		if (isdigit(*user)) {
+			uid = (uid_t)strtol(user, &endp, 0);
+			if (endp == user)
+				goto getuser;
+		} else {
+getuser:
+			if ((pw = getpwnam(user)))
+				uid = pw->pw_uid;
+			else
+				errx(1, "no such user %s", user);
+		}
+	}
+
+	if (chdir(argv[0]) || chroot("."))
+		err(1, "%s", argv[0]);
+
+	if (gids && setgroups(gids, gidlist) < 0)
+		err(1, "setgroups");
+	if (group && setgid(gid) < 0)
+		err(1, "setgid");
+	if (user && setuid(uid) < 0)
+		err(1, "setuid");
+
+	if (argv[1]) {
+		execvp(argv[1], &argv[1]);
+		err(1, "%s", argv[1]);
+	}
+
+	if (!(shell = getenv("SHELL")))
+		shell = _PATH_BSHELL;
+	execlp(shell, shell, "-i", NULL);
+	err(1, "%s", shell);
+	/* NOTREACHED */
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr, "usage: chroot [-g group] [-G group,group,...] "
+	    "[-u user] newroot [command]\n");
+	exit(1);
+}