imported original firmware WRT54GL_v4.30.11_11_US

1 files changed, 320 insertions, 0 deletions

diff --git a/release/src/router/busybox/loginutils/adduser.c b/release/src/router/busybox/loginutils/adduser.c
new file mode 100644
index 00000000..41dc9f01
--- /dev/null
+++ b/release/src/router/busybox/loginutils/adduser.c
@@ -0,0 +1,320 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * adduser - add users to /etc/passwd and /etc/shadow
+ *
+ * Copyright (C) 1999 by Lineo, inc. and John Beppu
+ * Copyright (C) 1999,2000,2001 by John Beppu <beppu@codepoet.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#ifndef _GNU_SOURCE
+#define _GNU_SOURCE
+#endif
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include "busybox.h"
+
+
+
+/* structs __________________________ */
+
+typedef struct {
+	uid_t u;
+	gid_t g;
+} Id;
+
+/* data _____________________________ */
+
+/* defaults : should this be in an external file? */
+static const char default_passwd[] = "x";
+static const char default_gecos[] = "Linux User,,,";
+static const char default_home_prefix[] = "/home";
+static const char default_shell[] = "/bin/sh";
+
+#ifdef CONFIG_FEATURE_SHADOWPASSWDS
+/* shadow in use? */
+static int shadow_enabled = 0;
+#endif
+
+/* remix */
+/* EDR recoded such that the uid may be passed in *p */
+static int passwd_study(const char *filename, struct passwd *p)
+{
+	struct passwd *pw;
+	FILE *passwd;
+
+	const int min = 500;
+	const int max = 65000;
+
+	passwd = bb_wfopen(filename, "r");
+	if (!passwd)
+		return 4;
+
+	/* EDR if uid is out of bounds, set to min */
+	if ((p->pw_uid > max) || (p->pw_uid < min))
+		p->pw_uid = min;
+
+	/* stuff to do:  
+	 * make sure login isn't taken;
+	 * find free uid and gid;
+	 */
+	while ((pw = fgetpwent(passwd))) {
+		if (strcmp(pw->pw_name, p->pw_name) == 0) {
+			/* return 0; */
+			return 1;
+		}
+		if ((pw->pw_uid >= p->pw_uid) && (pw->pw_uid < max)
+			&& (pw->pw_uid >= min)) {
+			p->pw_uid = pw->pw_uid + 1;
+		}
+	}
+
+	if (p->pw_gid == 0) {
+		/* EDR check for an already existing gid */
+		while (getgrgid(p->pw_uid) != NULL)
+			p->pw_uid++;
+
+		/* EDR also check for an existing group definition */
+		if (getgrnam(p->pw_name) != NULL)
+			return 3;
+
+		/* EDR create new gid always = uid */
+		p->pw_gid = p->pw_uid;
+	}
+
+	/* EDR bounds check */
+	if ((p->pw_uid > max) || (p->pw_uid < min))
+		return 2;
+
+	/* return 1; */
+	return 0;
+}
+
+static void addgroup_wrapper(const char *login, gid_t gid)
+{
+	char *cmd;
+
+	bb_xasprintf(&cmd, "addgroup -g %d %s", gid, login);
+	system(cmd);
+	free(cmd);
+}
+
+static void passwd_wrapper(const char *login) __attribute__ ((noreturn));
+
+static void passwd_wrapper(const char *login)
+{
+	static const char prog[] = "passwd";
+	execlp(prog, prog, login, NULL);
+	bb_error_msg_and_die("Failed to execute '%s', you must set the password for '%s' manually", prog, login);
+}
+
+/* putpwent(3) remix */
+static int adduser(const char *filename, struct passwd *p, int makehome, int setpass)
+{
+	FILE *passwd;
+	int r;
+#ifdef CONFIG_FEATURE_SHADOWPASSWDS
+	FILE *shadow;
+	struct spwd *sp;
+#endif
+	int new_group = 1;
+
+	/* if using a pre-existing group, don't create one */
+	if (p->pw_gid != 0)
+		new_group = 0;
+
+	/* make sure everything is kosher and setup uid && gid */
+	passwd = bb_wfopen(filename, "a");
+	if (passwd == NULL) {
+		return 1;
+	}
+	fseek(passwd, 0, SEEK_END);
+
+	/* if (passwd_study(filename, p) == 0) { */
+	r = passwd_study(filename, p);
+	if (r) {
+		if (r == 1)
+			bb_error_msg("%s: login already in use", p->pw_name);
+		else if (r == 2)
+			bb_error_msg("illegal uid or no uids left");
+		else if (r == 3)
+			bb_error_msg("group name %s already in use", p->pw_name);
+		else
+			bb_error_msg("generic error.");
+		return 1;
+	}
+
+	/* add to passwd */
+	if (putpwent(p, passwd) == -1) {
+		return 1;
+	}
+	fclose(passwd);
+
+#ifdef CONFIG_FEATURE_SHADOWPASSWDS
+	/* add to shadow if necessary */
+	if (shadow_enabled) {
+		shadow = bb_wfopen(bb_path_shadow_file, "a");
+		if (shadow == NULL) {
+			return 1;
+		}
+		fseek(shadow, 0, SEEK_END);
+		sp = pwd_to_spwd(p);
+		sp->sp_max = 99999;		/* debianish */
+		sp->sp_warn = 7;
+		fprintf(shadow, "%s:!:%ld:%ld:%ld:%ld:::\n",
+				sp->sp_namp, sp->sp_lstchg, sp->sp_min, sp->sp_max,
+				sp->sp_warn);
+		fclose(shadow);
+	}
+#endif
+
+	if (new_group) {
+		/* add to group */
+		/* addgroup should be responsible for dealing w/ gshadow */
+		addgroup_wrapper(p->pw_name, p->pw_gid);
+	}
+
+	/* Clear the umask for this process so it doesn't
+	 * * screw up the permissions on the mkdir and chown. */
+	umask(0);
+
+	if (makehome) {
+		/* mkdir */
+		if (mkdir(p->pw_dir, 0755)) {
+			bb_perror_msg("%s", p->pw_dir);
+		}
+		/* Set the owner and group so it is owned by the new user. */
+		if (chown(p->pw_dir, p->pw_uid, p->pw_gid)) {
+			bb_perror_msg("%s", p->pw_dir);
+		}
+		/* Now fix up the permissions to 2755. Can't do it before now
+		 * since chown will clear the setgid bit */
+		if (chmod(p->pw_dir, 02755)) {
+			bb_perror_msg("%s", p->pw_dir);
+		}
+	}
+
+	if (setpass) {
+		/* interactively set passwd */
+		passwd_wrapper(p->pw_name);
+	}
+
+	return 0;
+}
+
+
+/* return current uid (root is always uid == 0, right?) */
+#ifndef CONFIG_ADDGROUP
+static inline void if_i_am_not_root(void)
+#else
+void if_i_am_not_root(void)
+#endif
+{
+	if (geteuid()) {
+		bb_error_msg_and_die( "Only root may add a user or group to the system.");
+	}
+}
+
+#define SETPASS				1
+#define MAKEHOME			4
+
+/*
+ * adduser will take a login_name as its first parameter.
+ *
+ * home
+ * shell
+ * gecos 
+ *
+ * can be customized via command-line parameters.
+ * ________________________________________________________________________ */
+int adduser_main(int argc, char **argv)
+{
+	struct passwd pw;
+	const char *login;
+	const char *gecos = default_gecos;
+	const char *home = NULL;
+	const char *shell = default_shell;
+ 	const char *usegroup = NULL;
+	int flags;
+	int setpass = 1;
+	int makehome = 1;
+
+	/* init */
+	if (argc < 2) {
+		bb_show_usage();
+	}
+	/* get args */
+	flags = bb_getopt_ulflags(argc, argv, "h:g:s:G:DSH", &home, &gecos, &shell, &usegroup);
+
+	if (flags & SETPASS) {
+		setpass = 0;
+	}
+	if (flags & MAKEHOME) {
+		makehome = 0;
+	}
+
+	/* got root? */
+	if_i_am_not_root();
+
+	/* get login */
+	if (optind >= argc) {
+		bb_error_msg_and_die( "no user specified");
+	}
+	login = argv[optind];
+
+	/* create string for $HOME if not specified already */
+	if (!home) {
+		home = concat_path_file(default_home_prefix, login);
+	}
+#ifdef CONFIG_FEATURE_SHADOWPASSWDS
+	/* is /etc/shadow in use? */
+	shadow_enabled = (0 == access(bb_path_shadow_file, F_OK));
+#endif
+
+	/* create a passwd struct */
+	pw.pw_name = (char *)login;
+	pw.pw_passwd = (char *)default_passwd;
+	pw.pw_uid = 0;
+	pw.pw_gid = 0;
+	pw.pw_gecos = (char *)gecos;
+	pw.pw_dir = (char *)home;
+	pw.pw_shell = (char *)shell;
+
+	if (usegroup) {
+		/* Add user to a group that already exists */
+		struct group *g;
+
+		g = getgrnam(usegroup);
+		if (g == NULL)
+			bb_error_msg_and_die("group %s does not exist", usegroup);
+
+		pw.pw_gid = g->gr_gid;
+	}
+
+	/* grand finale */
+	return adduser(bb_path_passwd_file, &pw, makehome, setpass);
+}