initial population

1 files changed, 195 insertions, 0 deletions

diff --git a/usr.bin/newgrp/newgrp.c b/usr.bin/newgrp/newgrp.c
new file mode 100644
index 0000000..61309c3
--- /dev/null
+++ b/usr.bin/newgrp/newgrp.c
@@ -0,0 +1,195 @@
+/*-
+ * Copyright (c) 2007 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Brian Ginsbach.
+ *
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+
+#ifndef lint
+__RCSID("$NetBSD: newgrp.c,v 1.7 2011/09/16 15:39:27 joerg Exp $");
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/types.h>
+
+#include <err.h>
+#include <grp.h>
+#include <libgen.h>
+#include <paths.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifdef LOGIN_CAP
+#include <login_cap.h>
+#endif
+
+#include "grutil.h"
+
+__dead static void
+usage(void)
+{
+	(void)fprintf(stderr, "usage: %s [-l] [group]\n", getprogname());
+	exit(EXIT_FAILURE);
+}
+
+int
+main(int argc, char *argv[])
+{
+	extern char **environ;
+	struct passwd *pwd;
+	int c, lflag;
+	char *shell, sbuf[MAXPATHLEN + 2];
+	uid_t uid;
+#ifdef LOGIN_CAP
+	login_cap_t *lc;
+	u_int flags = LOGIN_SETUSER;
+#endif
+
+	uid = getuid();
+	pwd = getpwuid(uid);
+	if (pwd == NULL)
+		errx(EXIT_FAILURE, "who are you?");
+
+#ifdef LOGIN_CAP
+	if ((lc = login_getclass(pwd->pw_class)) == NULL)
+		errx(EXIT_FAILURE, "%s: unknown login class", pwd->pw_class);
+#endif
+
+	(void)setprogname(argv[0]);
+	lflag = 0;
+	while ((c = getopt(argc, argv, "-l")) != -1) {
+		switch (c) {
+		case '-':
+		case 'l':
+			if (lflag)
+				usage();
+			lflag = 1;
+			break;
+		default:
+			usage();
+			break;
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc > 0) {
+#if 0
+		pwd->pw_gid = newgrp(*argv, pwd);
+		addgrp(pwd->pw_gid);
+		if (setgid(pwd->pw_gid) < 0)
+			err(1, "setgid");
+#endif
+#ifdef LOGIN_CAP
+		addgroup(lc, *argv, pwd, getuid(), "Password:");
+#else
+		addgroup(*argv, pwd, getuid(), "Password:");
+#endif
+	} else {
+#ifdef LOGIN_CAP
+		flags |= LOGIN_SETGROUP;
+#else
+		if (initgroups(pwd->pw_name, pwd->pw_gid) == -1)
+			err(EXIT_FAILURE, "initgroups");
+		if (setgid(pwd->pw_gid) == -1)
+			err(EXIT_FAILURE, "setgid");
+#endif
+	}
+
+#ifdef LOGIN_CAP
+	if (setusercontext(lc, pwd, uid, flags) == -1)
+		err(EXIT_FAILURE, "setusercontext");
+	if (!lflag)
+		login_close(lc);
+#else
+	if (setuid(pwd->pw_uid) == -1)
+		err(EXIT_FAILURE, "setuid");
+#endif
+
+	if (*pwd->pw_shell == '\0') {
+#ifdef TRUST_ENV_SHELL
+		shell = getenv("SHELL");
+		if (shell != NULL)
+			pwd->pw_shell = shell;
+		else
+#endif
+			pwd->pw_shell = __UNCONST(_PATH_BSHELL);
+	}
+
+	shell = pwd->pw_shell;
+
+	if (lflag) {
+		char *term;
+#ifdef KERBEROS
+		char *krbtkfile;
+#endif
+
+		if (chdir(pwd->pw_dir) == -1)
+			warn("%s", pwd->pw_dir);
+
+		term = getenv("TERM");
+#ifdef KERBEROS
+		krbtkfile = getenv("KRBTKFILE");
+#endif
+
+		/* create an empty environment */
+		if ((environ = malloc(sizeof(char *))) == NULL)
+			err(EXIT_FAILURE, NULL);
+		environ[0] = NULL;
+#ifdef LOGIN_CAP
+		if (setusercontext(lc, pwd, uid, LOGIN_SETENV | LOGIN_SETPATH) == -1)
+			err(EXIT_FAILURE, "setusercontext");
+		login_close(lc);
+#else
+		(void)setenv("PATH", _PATH_DEFPATH, 1);
+#endif
+		if (term != NULL)
+			(void)setenv("TERM", term, 1);
+#ifdef KERBEROS
+		if (krbtkfile != NULL)
+			(void)setenv("KRBTKFILE", krbtkfile, 1);
+#endif
+
+		(void)setenv("LOGNAME", pwd->pw_name, 1);
+		(void)setenv("USER", pwd->pw_name, 1);
+		(void)setenv("HOME", pwd->pw_dir, 1);
+		(void)setenv("SHELL", pwd->pw_shell, 1);
+
+		sbuf[0] = '-';
+		(void)strlcpy(sbuf + 1, basename(pwd->pw_shell),
+			      sizeof(sbuf) - 1);
+		shell = sbuf;
+	}
+
+	(void)execl(pwd->pw_shell, shell, NULL);
+	err(EXIT_FAILURE, "%s", pwd->pw_shell);
+	/* NOTREACHED */
+}