spdx: initial adoption of licensing ID tags.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

Initially, only tag files that use BSD 4-Clause "Original" license.

RelNotes:	yes
Differential Revision:	https://reviews.freebsd.org/D13133

5 files changed, 568 insertions, 1 deletions

diff --git a/chpass/chpass.c b/chpass/chpass.c
index 74c96be..643b0f3 100644
--- a/chpass/chpass.c
+++ b/chpass/chpass.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 1988, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
  * Copyright (c) 2002 Networks Associates Technology, Inc.
diff --git a/chpass/chpass.h b/chpass/chpass.h
index fd3a839..b655c5d 100644
--- a/chpass/chpass.h
+++ b/chpass/chpass.h
@@ -1,4 +1,6 @@
-/*
+/*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 1988, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
  * Copyright (c) 2002 Networks Associates Technology, Inc.
diff --git a/chpass/edit.c b/chpass/edit.c
new file mode 100644
index 0000000..fbe1015
--- /dev/null
+++ b/chpass/edit.c
@@ -0,0 +1,298 @@
+/*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
+ * Copyright (c) 1990, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ * Copyright (c) 2002 Networks Associates Technology, Inc.
+ * All rights reserved.
+ *
+ * Portions of this software were developed for the FreeBSD Project by
+ * ThinkSec AS and NAI Labs, the Security Research Division of Network
+ * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
+ * ("CBOSS"), as part of the DARPA CHATS research program.
+ *
+ * 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.
+ */
+
+#if 0
+#ifndef lint
+static char sccsid[] = "@(#)edit.c	8.3 (Berkeley) 4/2/94";
+#endif /* not lint */
+#endif
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <paths.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <pw_scan.h>
+#include <libutil.h>
+
+#include "chpass.h"
+
+static int display(const char *tfn, struct passwd *pw);
+static struct passwd *verify(const char *tfn, struct passwd *pw);
+
+struct passwd *
+edit(const char *tfn, struct passwd *pw)
+{
+	struct passwd *npw;
+	char *line;
+	size_t len;
+
+	if (display(tfn, pw) == -1)
+		return (NULL);
+	for (;;) {
+		switch (pw_edit(1)) {
+		case -1:
+			return (NULL);
+		case 0:
+			return (pw_dup(pw));
+		default:
+			break;
+		}
+		if ((npw = verify(tfn, pw)) != NULL)
+			return (npw);
+		free(npw);
+		printf("re-edit the password file? ");
+		fflush(stdout);
+		if ((line = fgetln(stdin, &len)) == NULL) {
+			warn("fgetln()");
+			return (NULL);
+		}
+		if (len > 0 && (*line == 'N' || *line == 'n'))
+			return (NULL);
+	}
+}
+
+/*
+ * display --
+ *	print out the file for the user to edit; strange side-effect:
+ *	set conditional flag if the user gets to edit the shell.
+ */
+static int
+display(const char *tfn, struct passwd *pw)
+{
+	FILE *fp;
+	char *bp, *gecos, *p;
+
+	if ((fp = fopen(tfn, "w")) == NULL) {
+		warn("%s", tfn);
+		return (-1);
+	}
+
+	(void)fprintf(fp,
+	    "#Changing user information for %s.\n", pw->pw_name);
+	if (master_mode) {
+		(void)fprintf(fp, "Login: %s\n", pw->pw_name);
+		(void)fprintf(fp, "Password: %s\n", pw->pw_passwd);
+		(void)fprintf(fp, "Uid [#]: %lu\n", (unsigned long)pw->pw_uid);
+		(void)fprintf(fp, "Gid [# or name]: %lu\n",
+		    (unsigned long)pw->pw_gid);
+		(void)fprintf(fp, "Change [month day year]: %s\n",
+		    ttoa(pw->pw_change));
+		(void)fprintf(fp, "Expire [month day year]: %s\n",
+		    ttoa(pw->pw_expire));
+		(void)fprintf(fp, "Class: %s\n", pw->pw_class);
+		(void)fprintf(fp, "Home directory: %s\n", pw->pw_dir);
+		(void)fprintf(fp, "Shell: %s\n",
+		    *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
+	}
+	/* Only admin can change "restricted" shells. */
+#if 0
+	else if (ok_shell(pw->pw_shell))
+		/*
+		 * Make shell a restricted field.  Ugly with a
+		 * necklace, but there's not much else to do.
+		 */
+#else
+	else if ((!list[E_SHELL].restricted && ok_shell(pw->pw_shell)) ||
+	    master_mode)
+		/*
+		 * If change not restrict (table.c) and standard shell
+		 *	OR if root, then allow editing of shell.
+		 */
+#endif
+		(void)fprintf(fp, "Shell: %s\n",
+		    *pw->pw_shell ? pw->pw_shell : _PATH_BSHELL);
+	else
+		list[E_SHELL].restricted = 1;
+
+	if ((bp = gecos = strdup(pw->pw_gecos)) == NULL) {
+		warn(NULL);
+		fclose(fp);
+		return (-1);
+	}
+
+	p = strsep(&bp, ",");
+	p = strdup(p ? p : "");
+	list[E_NAME].save = p;
+	if (!list[E_NAME].restricted || master_mode)
+	  (void)fprintf(fp, "Full Name: %s\n", p);
+
+	p = strsep(&bp, ",");
+	p = strdup(p ? p : "");
+	list[E_LOCATE].save = p;
+	if (!list[E_LOCATE].restricted || master_mode)
+	  (void)fprintf(fp, "Office Location: %s\n", p);
+
+	p = strsep(&bp, ",");
+	p = strdup(p ? p : "");
+	list[E_BPHONE].save = p;
+	if (!list[E_BPHONE].restricted || master_mode)
+	  (void)fprintf(fp, "Office Phone: %s\n", p);
+
+	p = strsep(&bp, ",");
+	p = strdup(p ? p : "");
+	list[E_HPHONE].save = p;
+	if (!list[E_HPHONE].restricted || master_mode)
+	  (void)fprintf(fp, "Home Phone: %s\n", p);
+
+	bp = strdup(bp ? bp : "");
+	list[E_OTHER].save = bp;
+	if (!list[E_OTHER].restricted || master_mode)
+	  (void)fprintf(fp, "Other information: %s\n", bp);
+
+	free(gecos);
+
+	(void)fchown(fileno(fp), getuid(), getgid());
+	(void)fclose(fp);
+	return (0);
+}
+
+static struct passwd *
+verify(const char *tfn, struct passwd *pw)
+{
+	struct passwd *npw;
+	ENTRY *ep;
+	char *buf, *p, *val;
+	struct stat sb;
+	FILE *fp;
+	int line;
+	size_t len;
+
+	if ((pw = pw_dup(pw)) == NULL)
+		return (NULL);
+	if ((fp = fopen(tfn, "r")) == NULL ||
+	    fstat(fileno(fp), &sb) == -1) {
+		warn("%s", tfn);
+		free(pw);
+		return (NULL);
+	}
+	if (sb.st_size == 0) {
+		warnx("corrupted temporary file");
+		fclose(fp);
+		free(pw);
+		return (NULL);
+	}
+	val = NULL;
+	for (line = 1; (buf = fgetln(fp, &len)) != NULL; ++line) {
+		if (*buf == '\0' || *buf == '#')
+			continue;
+		while (len > 0 && isspace(buf[len - 1]))
+			--len;
+		for (ep = list;; ++ep) {
+			if (!ep->prompt) {
+				warnx("%s: unrecognized field on line %d",
+				    tfn, line);
+				goto bad;
+			}
+			if (ep->len > len)
+				continue;
+			if (strncasecmp(buf, ep->prompt, ep->len) != 0)
+				continue;
+			if (ep->restricted && !master_mode) {
+				warnx("%s: you may not change the %s field",
+				    tfn, ep->prompt);
+				goto bad;
+			}
+			for (p = buf; p < buf + len && *p != ':'; ++p)
+				/* nothing */ ;
+			if (*p != ':') {
+				warnx("%s: line %d corrupted", tfn, line);
+				goto bad;
+			}
+			while (++p < buf + len && isspace(*p))
+				/* nothing */ ;
+			free(val);
+			asprintf(&val, "%.*s", (int)(buf + len - p), p);
+			if (val == NULL)
+				goto bad;
+			if (ep->except && strpbrk(val, ep->except)) {
+				warnx("%s: invalid character in \"%s\" field '%s'",
+				    tfn, ep->prompt, val);
+				goto bad;
+			}
+			if ((ep->func)(val, pw, ep))
+				goto bad;
+			break;
+		}
+	}
+	free(val);
+	fclose(fp);
+
+	/* Build the gecos field. */
+	len = asprintf(&p, "%s,%s,%s,%s,%s", list[E_NAME].save,
+	    list[E_LOCATE].save, list[E_BPHONE].save,
+	    list[E_HPHONE].save, list[E_OTHER].save);
+	if (p == NULL) {
+		warn("asprintf()");
+		free(pw);
+		return (NULL);
+	}
+	while (len > 0 && p[len - 1] == ',')
+		p[--len] = '\0';
+	pw->pw_gecos = p;
+	buf = pw_make(pw);
+	free(pw);
+	free(p);
+	if (buf == NULL) {
+		warn("pw_make()");
+		return (NULL);
+	}
+	npw = pw_scan(buf, PWSCAN_WARN|PWSCAN_MASTER);
+	free(buf);
+	return (npw);
+bad:
+	free(pw);
+	free(val);
+	fclose(fp);
+	return (NULL);
+}
diff --git a/chpass/field.c b/chpass/field.c
new file mode 100644
index 0000000..3b5129c
--- /dev/null
+++ b/chpass/field.c
@@ -0,0 +1,263 @@
+/*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
+ * Copyright (c) 1988, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ * Copyright (c) 2002 Networks Associates Technology, Inc.
+ * All rights reserved.
+ *
+ * Portions of this software were developed for the FreeBSD Project by
+ * ThinkSec AS and NAI Labs, the Security Research Division of Network
+ * Associates, Inc.  under DARPA/SPAWAR contract N66001-01-C-8035
+ * ("CBOSS"), as part of the DARPA CHATS research program.
+ *
+ * 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.
+ */
+
+#if 0
+#ifndef lint
+static char sccsid[] = "@(#)field.c	8.4 (Berkeley) 4/2/94";
+#endif /* not lint */
+#endif
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/stat.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <grp.h>
+#include <paths.h>
+#include <pwd.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "chpass.h"
+
+/* ARGSUSED */
+int
+p_login(char *p, struct passwd *pw, ENTRY *ep __unused)
+{
+	if (!*p) {
+		warnx("empty login field");
+		return (-1);
+	}
+	if (*p == '-') {
+		warnx("login names may not begin with a hyphen");
+		return (-1);
+	}
+	if (!(pw->pw_name = strdup(p))) {
+		warnx("can't save entry");
+		return (-1);
+	}
+	if (strchr(p, '.'))
+		warnx("\'.\' is dangerous in a login name");
+	for (; *p; ++p)
+		if (isupper(*p)) {
+			warnx("upper-case letters are dangerous in a login name");
+			break;
+		}
+	return (0);
+}
+
+/* ARGSUSED */
+int
+p_passwd(char *p, struct passwd *pw, ENTRY *ep __unused)
+{
+	if (!(pw->pw_passwd = strdup(p))) {
+		warnx("can't save password entry");
+		return (-1);
+	}
+
+	return (0);
+}
+
+/* ARGSUSED */
+int
+p_uid(char *p, struct passwd *pw, ENTRY *ep __unused)
+{
+	uid_t id;
+	char *np;
+
+	if (!*p) {
+		warnx("empty uid field");
+		return (-1);
+	}
+	if (!isdigit(*p)) {
+		warnx("illegal uid");
+		return (-1);
+	}
+	errno = 0;
+	id = strtoul(p, &np, 10);
+	if (*np || (id == (uid_t)ULONG_MAX && errno == ERANGE)) {
+		warnx("illegal uid");
+		return (-1);
+	}
+	pw->pw_uid = id;
+	return (0);
+}
+
+/* ARGSUSED */
+int
+p_gid(char *p, struct passwd *pw, ENTRY *ep __unused)
+{
+	struct group *gr;
+	gid_t id;
+	char *np;
+
+	if (!*p) {
+		warnx("empty gid field");
+		return (-1);
+	}
+	if (!isdigit(*p)) {
+		if (!(gr = getgrnam(p))) {
+			warnx("unknown group %s", p);
+			return (-1);
+		}
+		pw->pw_gid = gr->gr_gid;
+		return (0);
+	}
+	errno = 0;
+	id = strtoul(p, &np, 10);
+	if (*np || (id == (uid_t)ULONG_MAX && errno == ERANGE)) {
+		warnx("illegal gid");
+		return (-1);
+	}
+	pw->pw_gid = id;
+	return (0);
+}
+
+/* ARGSUSED */
+int
+p_class(char *p, struct passwd *pw, ENTRY *ep __unused)
+{
+	if (!(pw->pw_class = strdup(p))) {
+		warnx("can't save entry");
+		return (-1);
+	}
+
+	return (0);
+}
+
+/* ARGSUSED */
+int
+p_change(char *p, struct passwd *pw, ENTRY *ep __unused)
+{
+	if (!atot(p, &pw->pw_change))
+		return (0);
+	warnx("illegal date for change field");
+	return (-1);
+}
+
+/* ARGSUSED */
+int
+p_expire(char *p, struct passwd *pw, ENTRY *ep __unused)
+{
+	if (!atot(p, &pw->pw_expire))
+		return (0);
+	warnx("illegal date for expire field");
+	return (-1);
+}
+
+/* ARGSUSED */
+int
+p_gecos(char *p, struct passwd *pw __unused, ENTRY *ep)
+{
+	if (!(ep->save = strdup(p))) {
+		warnx("can't save entry");
+		return (-1);
+	}
+	return (0);
+}
+
+/* ARGSUSED */
+int
+p_hdir(char *p, struct passwd *pw, ENTRY *ep __unused)
+{
+	if (!*p) {
+		warnx("empty home directory field");
+		return (-1);
+	}
+	if (!(pw->pw_dir = strdup(p))) {
+		warnx("can't save entry");
+		return (-1);
+	}
+	return (0);
+}
+
+/* ARGSUSED */
+int
+p_shell(char *p, struct passwd *pw, ENTRY *ep __unused)
+{
+	struct stat sbuf;
+
+	if (!*p) {
+		pw->pw_shell = strdup(_PATH_BSHELL);
+		return (0);
+	}
+	/* only admin can change from or to "restricted" shells */
+	if (!master_mode && pw->pw_shell && !ok_shell(pw->pw_shell)) {
+		warnx("%s: current shell non-standard", pw->pw_shell);
+		return (-1);
+	}
+	if (!ok_shell(p)) {
+		if (!master_mode) {
+			warnx("%s: non-standard shell", p);
+			return (-1);
+		}
+		pw->pw_shell = strdup(p);
+	}
+	else
+		pw->pw_shell = dup_shell(p);
+	if (!pw->pw_shell) {
+		warnx("can't save entry");
+		return (-1);
+	}
+	if (stat(pw->pw_shell, &sbuf) < 0) {
+		if (errno == ENOENT)
+			warnx("WARNING: shell '%s' does not exist",
+			    pw->pw_shell);
+		else
+			warn("WARNING: can't stat shell '%s'",  pw->pw_shell);
+		return (0);
+	}
+	if (!S_ISREG(sbuf.st_mode)) {
+		warnx("WARNING: shell '%s' is not a regular file",
+			pw->pw_shell);
+		return (0);
+	}
+	if ((sbuf.st_mode & (S_IXOTH | S_IXGRP | S_IXUSR)) == 0) {
+		warnx("WARNING: shell '%s' is not executable", pw->pw_shell);
+		return (0);
+	}
+	return (0);
+}
diff --git a/chpass/util.c b/chpass/util.c
index baf160e..bfece1d 100644
--- a/chpass/util.c
+++ b/chpass/util.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
  * Copyright (c) 1988, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
  * Copyright (c) 2002 Networks Associates Technology, Inc.