embedaddon/sudo/plugins/sudoers/sudoers.c - diff

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Diff for /embedaddon/sudo/plugins/sudoers/sudoers.c between versions 1.1 and 1.1.1.4

version 1.1, 2012/02/21 16:23:02	version 1.1.1.4, 2013/07/22 10:46:12
Line 1	Line 1
/*	/*
* Copyright (c) 1993-1996, 1998-2011 Todd C. Miller <Todd.Miller@courtesan.com>	* Copyright (c) 1993-1996, 1998-2013 Todd C. Miller <Todd.Miller@courtesan.com>
*	*
* Permission to use, copy, modify, and distribute this software for any	* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above	* purpose with or without fee is hereby granted, provided that the above
Line 16	Line 16
* Sponsored in part by the Defense Advanced Research Projects	* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force	* Agency (DARPA) and Air Force Research Laboratory, Air Force
* Materiel Command, USAF, under agreement number F39502-99-1-0512.	* Materiel Command, USAF, under agreement number F39502-99-1-0512.
*
* For a brief history of sudo, please see the HISTORY file included
* with this distribution.
*/	*/

#define _SUDO_MAIN	#define _SUDO_MAIN
Line 31	Line 28

#include <sys/types.h>	#include <sys/types.h>
#include <sys/stat.h>	#include <sys/stat.h>
#include <sys/param.h>
#include <sys/socket.h>	#include <sys/socket.h>
#include <stdio.h>	#include <stdio.h>
#ifdef STDC_HEADERS	#ifdef STDC_HEADERS
Line 60	Line 56
#include <signal.h>	#include <signal.h>
#include <grp.h>	#include <grp.h>
#include <time.h>	#include <time.h>
#ifdef HAVE_SETLOCALE
# include <locale.h>
#endif
#include <netinet/in.h>
#include <netdb.h>	#include <netdb.h>
#ifdef HAVE_LOGIN_CAP_H	#ifdef HAVE_LOGIN_CAP_H
# include <login_cap.h>	# include <login_cap.h>
# ifndef LOGIN_DEFROOTCLASS	# ifndef LOGIN_DEFROOTCLASS
# define LOGIN_DEFROOTCLASS "daemon"	# define LOGIN_DEFROOTCLASS "daemon"
# endif	# endif
	# ifndef LOGIN_SETENV
	# define LOGIN_SETENV 0
	# endif
#endif	#endif
#ifdef HAVE_SELINUX	#ifdef HAVE_SELINUX
# include <selinux/selinux.h>	# include <selinux/selinux.h>
#endif	#endif
#include <ctype.h>	#include <ctype.h>
#include <setjmp.h>	#ifndef HAVE_GETADDRINFO
	# include "compat/getaddrinfo.h"
	#endif

#include "sudoers.h"	#include "sudoers.h"
#include "interfaces.h"
#include "sudoers_version.h"
#include "auth/sudo_auth.h"	#include "auth/sudo_auth.h"
	#include "secure_path.h"

/*	/*
* Prototypes	* Prototypes
*/	*/
static void init_vars(char * const *);	static char find_editor(int nfiles, char files, char **argv_out);
	static int cb_runas_default(const char *);
	static int cb_sudoers_locale(const char *);
static int set_cmnd(void);	static int set_cmnd(void);
	static void create_admin_success_flag(void);
	static void init_vars(char * const *);
	static void set_fqdn(void);
static void set_loginclass(struct passwd *);	static void set_loginclass(struct passwd *);
static void set_runaspw(const char *);
static void set_runasgr(const char *);	static void set_runasgr(const char *);
static int cb_runas_default(const char *);	static void set_runaspw(const char *);
static int sudoers_policy_version(int verbose);	static bool tty_present(void);
static int deserialize_info(char * const settings[], char * const user_info[]);
static char find_editor(int nfiles, char files, char **argv_out);
static void create_admin_success_flag(void);

/*	/*
* Globals	* Globals
*/	*/
const char *sudoers_file = _PATH_SUDOERS;
mode_t sudoers_mode = SUDOERS_MODE;
uid_t sudoers_uid = SUDOERS_UID;
gid_t sudoers_gid = SUDOERS_GID;
struct sudo_user sudo_user;	struct sudo_user sudo_user;
struct passwd *list_pw;	struct passwd *list_pw;
struct interface *interfaces;
int long_list;	int long_list;
int debug_level;
uid_t timestamp_uid;	uid_t timestamp_uid;
extern int errorlineno;	extern int errorlineno;
extern int parse_error;	extern bool parse_error;
extern char *errorfile;	extern char *errorfile;
#ifdef HAVE_LOGIN_CAP_H
login_cap_t *lc;
#endif /* HAVE_LOGIN_CAP_H */
#ifdef HAVE_BSD_AUTH_H	#ifdef HAVE_BSD_AUTH_H
char *login_style;	char *login_style;
#endif /* HAVE_BSD_AUTH_H */	#endif /* HAVE_BSD_AUTH_H */
sudo_conv_t sudo_conv;
sudo_printf_t sudo_printf;
int sudo_mode;	int sudo_mode;

static char *prev_user;	static char *prev_user;
static char *runas_user;	static char *runas_user;
static char *runas_group;	static char *runas_group;
static struct sudo_nss_list *snl;	static struct sudo_nss_list *snl;
static const char *interfaces_string;
static sigaction_t saved_sa_int, saved_sa_quit, saved_sa_tstp;

/* XXX - must be extern for audit bits of sudo_auth.c */	/* XXX - must be extern for audit bits of sudo_auth.c */
int NewArgc;	int NewArgc;
char **NewArgv;	char **NewArgv;

/* plugin_error.c */	int
extern sigjmp_buf error_jmp;	sudoers_policy_init(void info, char const envp[])

static int
sudoers_policy_open(unsigned int version, sudo_conv_t conversation,
sudo_printf_t plugin_printf, char * const settings[],
char * const user_info[], char * const envp[])
{	{
volatile int sources = 0;	volatile int sources = 0;
sigaction_t sa;	struct sudo_nss nss, nss_next;
struct sudo_nss *nss;	debug_decl(sudoers_policy_init, SUDO_DEBUG_PLUGIN)

if (!sudo_conv)
sudo_conv = conversation;
if (!sudo_printf)
sudo_printf = plugin_printf;

if (sigsetjmp(error_jmp, 1)) {
/* called via error(), errorx() or log_error() */
rewind_perms();
return -1;
}

bindtextdomain("sudoers", LOCALEDIR);	bindtextdomain("sudoers", LOCALEDIR);

/*
* Signal setup:
* Ignore keyboard-generated signals so the user cannot interrupt
* us at some point and avoid the logging.
* Install handler to wait for children when they exit.
*/
zero_bytes(&sa, sizeof(sa));
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART;
sa.sa_handler = SIG_IGN;
(void) sigaction(SIGINT, &sa, &saved_sa_int);
(void) sigaction(SIGQUIT, &sa, &saved_sa_quit);
(void) sigaction(SIGTSTP, &sa, &saved_sa_tstp);

sudo_setpwent();	sudo_setpwent();
sudo_setgrent();	sudo_setgrent();

	/* Register fatal/fatalx callback. */
	fatal_callback_register(sudoers_cleanup);

/* Initialize environment functions (including replacements). */	/* Initialize environment functions (including replacements). */
env_init(envp);	env_init(envp);

/* Setup defaults data structures. */	/* Setup defaults data structures. */
init_defaults();	init_defaults();

/* Parse settings and user_info */	/* Parse info from front-end. */
sudo_mode = deserialize_info(settings, user_info);	sudo_mode = sudoers_policy_deserialize_info(info, &runas_user, &runas_group);

init_vars(envp); /* XXX - move this later? */	init_vars(envp); /* XXX - move this later? */

Line 194 sudoers_policy_open(unsigned int version, sudo_conv_t	Line 151 sudoers_policy_open(unsigned int version, sudo_conv_t
set_perms(PERM_ROOT);	set_perms(PERM_ROOT);

/* Open and parse sudoers, set global defaults */	/* Open and parse sudoers, set global defaults */
tq_foreach_fwd(snl, nss) {	for (nss = snl->first; nss != NULL; nss = nss_next) {
if (nss->open(nss) == 0 && nss->parse(nss) == 0) {	nss_next = nss->next;
sources++;	if (nss->open(nss) == 0 && nss->parse(nss) == 0) {
if (nss->setdefs(nss) != 0)	sources++;
log_error(NO_STDERR\|NO_EXIT, _("problem with defaults entries"));	if (nss->setdefs(nss) != 0)
}	log_warning(NO_STDERR, N_("problem with defaults entries"));
	} else {
	tq_remove(snl, nss);
	}
}	}
if (sources == 0) {	if (sources == 0) {
warningx(_("no valid sudoers sources found, quitting"));	warningx(_("no valid sudoers sources found, quitting"));
return -1;	debug_return_bool(-1);
}	}

/* XXX - collect post-sudoers parse settings into a function */	/* XXX - collect post-sudoers parse settings into a function */
Line 212 sudoers_policy_open(unsigned int version, sudo_conv_t	Line 172 sudoers_policy_open(unsigned int version, sudo_conv_t
* Initialize external group plugin, if any.	* Initialize external group plugin, if any.
*/	*/
if (def_group_plugin) {	if (def_group_plugin) {
if (group_plugin_load(def_group_plugin) != TRUE)	if (group_plugin_load(def_group_plugin) != true)
def_group_plugin = NULL;	def_group_plugin = NULL;
}	}

Line 221 sudoers_policy_open(unsigned int version, sudo_conv_t	Line 181 sudoers_policy_open(unsigned int version, sudo_conv_t
* Note that if runas_group was specified without runas_user we	* Note that if runas_group was specified without runas_user we
* defer setting runas_pw so the match routines know to ignore it.	* defer setting runas_pw so the match routines know to ignore it.
*/	*/
	/* XXX - qpm4u does more here as it may have already set runas_pw */
if (runas_group != NULL) {	if (runas_group != NULL) {
set_runasgr(runas_group);	set_runasgr(runas_group);
if (runas_user != NULL)	if (runas_user != NULL)
Line 229 sudoers_policy_open(unsigned int version, sudo_conv_t	Line 190 sudoers_policy_open(unsigned int version, sudo_conv_t
set_runaspw(runas_user ? runas_user : def_runas_default);	set_runaspw(runas_user ? runas_user : def_runas_default);

if (!update_defaults(SETDEF_RUNAS))	if (!update_defaults(SETDEF_RUNAS))
log_error(NO_STDERR\|NO_EXIT, _("problem with defaults entries"));	log_warning(NO_STDERR, N_("problem with defaults entries"));

if (def_fqdn)	if (def_fqdn)
set_fqdn(); /* deferred until after sudoers is parsed */	set_fqdn(); /* deferred until after sudoers is parsed */

/* Set login class if applicable. */	/* Set login class if applicable. */
set_loginclass(sudo_user.pw);	set_loginclass(runas_pw ? runas_pw : sudo_user.pw);

restore_perms();	restore_perms();

return TRUE;	debug_return_bool(true);
}	}

static void	int
sudoers_policy_close(int exit_status, int error_code)
{
if (sigsetjmp(error_jmp, 1)) {
/* called via error(), errorx() or log_error() */
return;
}

/* We do not currently log the exit status. */
if (error_code)
warningx(_("unable to execute %s: %s"), safe_cmnd, strerror(error_code));

/* Close the session we opened in sudoers_policy_init_session(). */
if (ISSET(sudo_mode, MODE_RUN\|MODE_EDIT))
(void)sudo_auth_end_session(runas_pw);

/* Free remaining references to password and group entries. */
pw_delref(sudo_user.pw);
pw_delref(runas_pw);
if (runas_gr != NULL)
gr_delref(runas_gr);
if (user_group_list != NULL)
grlist_delref(user_group_list);
}

/*
* The init_session function is called before executing the command
* and before uid/gid changes occur.
*/
static int
sudoers_policy_init_session(struct passwd *pwd)
{
if (sigsetjmp(error_jmp, 1)) {
/* called via error(), errorx() or log_error() */
return -1;
}

return sudo_auth_begin_session(pwd);
}

static int
sudoers_policy_main(int argc, char * const argv[], int pwflag, char *env_add[],	sudoers_policy_main(int argc, char * const argv[], int pwflag, char *env_add[],
char command_infop[], char argv_out[], char **user_env_out[])	void *closure)
{	{
static char command_info[32]; / XXX */
char **edit_argv = NULL;	char **edit_argv = NULL;
	char *iolog_path = NULL;
	mode_t cmnd_umask = 0777;
struct sudo_nss *nss;	struct sudo_nss *nss;
int cmnd_status = -1, validated;	int cmnd_status = -1, oldlocale, validated;
volatile int info_len = 0;	volatile int rval = true;
volatile int rval = TRUE;	debug_decl(sudoers_policy_main, SUDO_DEBUG_PLUGIN)

if (sigsetjmp(error_jmp, 1)) {	/* XXX - would like to move this to policy.c but need the cleanup. */
/* error recovery via error(), errorx() or log_error() */	if (fatal_setjmp() != 0) {
	/* error recovery via fatal(), fatalx() or log_fatal() */
rval = -1;	rval = -1;
goto done;	goto done;
}	}
Line 335 sudoers_policy_main(int argc, char * const argv[], int	Line 258 sudoers_policy_main(int argc, char * const argv[], int
NewArgv = emalloc2(NewArgc + 2, sizeof(char *));	NewArgv = emalloc2(NewArgc + 2, sizeof(char *));
memcpy(++NewArgv, argv, argc * sizeof(char *));	memcpy(++NewArgv, argv, argc * sizeof(char *));
NewArgv[NewArgc] = NULL;	NewArgv[NewArgc] = NULL;
if (ISSET(sudo_mode, MODE_LOGIN_SHELL))	if (ISSET(sudo_mode, MODE_LOGIN_SHELL) && runas_pw != NULL)
NewArgv[0] = estrdup(runas_pw->pw_shell);	NewArgv[0] = estrdup(runas_pw->pw_shell);
}	}

/* If given the -P option, set the "preserve_groups" flag. */	/* If given the -P option, set the "preserve_groups" flag. */
if (ISSET(sudo_mode, MODE_PRESERVE_GROUPS))	if (ISSET(sudo_mode, MODE_PRESERVE_GROUPS))
def_preserve_groups = TRUE;	def_preserve_groups = true;

/* Find command in path */	/* Find command in path */
cmnd_status = set_cmnd();	cmnd_status = set_cmnd();
if (cmnd_status == -1) {
rval = -1;
goto done;
}

#ifdef HAVE_SETLOCALE
if (!setlocale(LC_ALL, def_sudoers_locale)) {
warningx(_("unable to set locale to \"%s\", using \"C\""),
def_sudoers_locale);
setlocale(LC_ALL, "C");
}
#endif

/*	/*
* Check sudoers sources.	* Check sudoers sources, using the locale specified in sudoers.
*/	*/
	sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, &oldlocale);
validated = FLAG_NO_USER \| FLAG_NO_HOST;	validated = FLAG_NO_USER \| FLAG_NO_HOST;
tq_foreach_fwd(snl, nss) {	tq_foreach_fwd(snl, nss) {
validated = nss->lookup(nss, validated, pwflag);	validated = nss->lookup(nss, validated, pwflag);

if (ISSET(validated, VALIDATE_OK)) {	if (ISSET(validated, VALIDATE_OK)) {
/* Handle "= auth" in netsvc.conf */	/* Handle [SUCCESS=return] */
if (nss->ret_if_found)	if (nss->ret_if_found)
break;	break;
} else {	} else {
Line 376 sudoers_policy_main(int argc, char * const argv[], int	Line 288 sudoers_policy_main(int argc, char * const argv[], int
}	}
}	}

	/* Restore user's locale. */
	sudoers_setlocale(oldlocale, NULL);

if (safe_cmnd == NULL)	if (safe_cmnd == NULL)
safe_cmnd = estrdup(user_cmnd);	safe_cmnd = estrdup(user_cmnd);

#ifdef HAVE_SETLOCALE
setlocale(LC_ALL, "");
#endif

/* If only a group was specified, set runas_pw based on invoking user. */	/* If only a group was specified, set runas_pw based on invoking user. */
if (runas_pw == NULL)	if (runas_pw == NULL)
set_runaspw(user_name);	set_runaspw(user_name);
Line 397 sudoers_policy_main(int argc, char * const argv[], int	Line 308 sudoers_policy_main(int argc, char * const argv[], int
pw = sudo_getpwuid(atoi(def_timestampowner + 1));	pw = sudo_getpwuid(atoi(def_timestampowner + 1));
else	else
pw = sudo_getpwnam(def_timestampowner);	pw = sudo_getpwnam(def_timestampowner);
if (!pw)	if (pw != NULL) {
log_error(0, _("timestamp owner (%s): No such user"),	timestamp_uid = pw->pw_uid;
	sudo_pw_delref(pw);
	} else {
	log_warning(0, N_("timestamp owner (%s): No such user"),
def_timestampowner);	def_timestampowner);
timestamp_uid = pw->pw_uid;	timestamp_uid = ROOT_UID;
pw_delref(pw);	}
}	}

/* If no command line args and "shell_noargs" is not set, error out. */	/* If no command line args and "shell_noargs" is not set, error out. */
Line 411 sudoers_policy_main(int argc, char * const argv[], int	Line 325 sudoers_policy_main(int argc, char * const argv[], int
}	}

/* Bail if a tty is required and we don't have one. */	/* Bail if a tty is required and we don't have one. */
if (def_requiretty) {	if (def_requiretty && !tty_present()) {
int fd = open(_PATH_TTY, O_RDWR\|O_NOCTTY);	audit_failure(NewArgv, N_("no tty"));
if (fd == -1) {	warningx(_("sorry, you must have a tty to run sudo"));
audit_failure(NewArgv, _("no tty"));	goto bad;
warningx(_("sorry, you must have a tty to run sudo"));
goto bad;
} else
(void) close(fd);
}	}

/*	/*
Line 427 sudoers_policy_main(int argc, char * const argv[], int	Line 337 sudoers_policy_main(int argc, char * const argv[], int
*/	*/
if (ISSET(sudo_mode, MODE_EDIT) \|\|	if (ISSET(sudo_mode, MODE_EDIT) \|\|
(ISSET(sudo_mode, MODE_PRESERVE_ENV) && def_setenv))	(ISSET(sudo_mode, MODE_PRESERVE_ENV) && def_setenv))
def_env_reset = FALSE;	def_env_reset = false;

/* Build a new environment that avoids any nasty bits. */	/* Build a new environment that avoids any nasty bits. */
rebuild_env();	rebuild_env();

/* Require a password if sudoers says so. */	/* Require a password if sudoers says so. */
rval = check_user(validated, sudo_mode);	rval = check_user(validated, sudo_mode);
if (rval != TRUE)	if (rval != true) {
	if (!ISSET(validated, VALIDATE_OK))
	log_denial(validated, false);
goto done;	goto done;
	}

/* If run as root with SUDO_USER set, set sudo_user.pw to that user. */	/* If run as root with SUDO_USER set, set sudo_user.pw to that user. */
/* XXX - causes confusion when root is not listed in sudoers */	/* XXX - causes confusion when root is not listed in sudoers */
Line 445 sudoers_policy_main(int argc, char * const argv[], int	Line 358 sudoers_policy_main(int argc, char * const argv[], int

if ((pw = sudo_getpwnam(prev_user)) != NULL) {	if ((pw = sudo_getpwnam(prev_user)) != NULL) {
if (sudo_user.pw != NULL)	if (sudo_user.pw != NULL)
pw_delref(sudo_user.pw);	sudo_pw_delref(sudo_user.pw);
sudo_user.pw = pw;	sudo_user.pw = pw;
}	}
}	}
Line 453 sudoers_policy_main(int argc, char * const argv[], int	Line 366 sudoers_policy_main(int argc, char * const argv[], int

/* If the user was not allowed to run the command we are done. */	/* If the user was not allowed to run the command we are done. */
if (!ISSET(validated, VALIDATE_OK)) {	if (!ISSET(validated, VALIDATE_OK)) {
if (ISSET(validated, FLAG_NO_USER \| FLAG_NO_HOST)) {	log_failure(validated, cmnd_status);
audit_failure(NewArgv, _("No user or host"));
log_denial(validated, 1);
} else {
if (def_path_info) {
/*
* We'd like to not leak path info at all here, but that can
* really confuse the users. To really close the leak we'd
* have to say "not allowed to run foo" even when the problem
* is just "no foo in path" since the user can trivially set
* their path to just contain a single dir.
*/
log_denial(validated,
!(cmnd_status == NOT_FOUND_DOT \|\| cmnd_status == NOT_FOUND));
if (cmnd_status == NOT_FOUND)
warningx(_("%s: command not found"), user_cmnd);
else if (cmnd_status == NOT_FOUND_DOT)
warningx(_("ignoring `%s' found in '.'\nUse `sudo ./%s' if this is the `%s' you wish to run."), user_cmnd, user_cmnd, user_cmnd);
} else {
/* Just tell the user they are not allowed to run foo. */
log_denial(validated, 1);
}
audit_failure(NewArgv, _("validation failure"));
}
goto bad;	goto bad;
}	}

Line 485 sudoers_policy_main(int argc, char * const argv[], int	Line 375 sudoers_policy_main(int argc, char * const argv[], int

/* Finally tell the user if the command did not exist. */	/* Finally tell the user if the command did not exist. */
if (cmnd_status == NOT_FOUND_DOT) {	if (cmnd_status == NOT_FOUND_DOT) {
audit_failure(NewArgv, _("command in current directory"));	audit_failure(NewArgv, N_("command in current directory"));
warningx(_("ignoring `%s' found in '.'\nUse `sudo ./%s' if this is the `%s' you wish to run."), user_cmnd, user_cmnd, user_cmnd);	warningx(_("ignoring `%s' found in '.'\nUse `sudo ./%s' if this is the `%s' you wish to run."), user_cmnd, user_cmnd, user_cmnd);
goto bad;	goto bad;
} else if (cmnd_status == NOT_FOUND) {	} else if (cmnd_status == NOT_FOUND) {
audit_failure(NewArgv, _("%s: command not found"), user_cmnd);	if (ISSET(sudo_mode, MODE_CHECK)) {
warningx(_("%s: command not found"), user_cmnd);	audit_failure(NewArgv, N_("%s: command not found"), NewArgv[0]);
	warningx(_("%s: command not found"), NewArgv[0]);
	} else {
	audit_failure(NewArgv, N_("%s: command not found"), user_cmnd);
	warningx(_("%s: command not found"), user_cmnd);
	}
goto bad;	goto bad;
}	}

Line 503 sudoers_policy_main(int argc, char * const argv[], int	Line 398 sudoers_policy_main(int argc, char * const argv[], int
validate_env_vars(sudo_user.env_vars);	validate_env_vars(sudo_user.env_vars);
}	}

if (ISSET(sudo_mode, (MODE_RUN \| MODE_EDIT)) && (def_log_input \|\| def_log_output)) {	if (ISSET(sudo_mode, (MODE_RUN \| MODE_EDIT))) {
if (def_iolog_file && def_iolog_dir) {	if ((def_log_input \|\| def_log_output) && def_iolog_file && def_iolog_dir) {
command_info[info_len++] = expand_iolog_path("iolog_path=",	const char prefix[] = "iolog_path=";
def_iolog_dir, def_iolog_file, &sudo_user.iolog_file);	iolog_path = expand_iolog_path(prefix, def_iolog_dir,
	def_iolog_file, &sudo_user.iolog_file);
sudo_user.iolog_file++;	sudo_user.iolog_file++;
}	}
if (def_log_input) {
command_info[info_len++] = estrdup("iolog_stdin=true");
command_info[info_len++] = estrdup("iolog_ttyin=true");
}
if (def_log_output) {
command_info[info_len++] = estrdup("iolog_stdout=true");
command_info[info_len++] = estrdup("iolog_stderr=true");
command_info[info_len++] = estrdup("iolog_ttyout=true");
}
if (def_compress_io)
command_info[info_len++] = estrdup("iolog_compress=true");
}	}

log_allowed(validated);	log_allowed(validated);
Line 546 sudoers_policy_main(int argc, char * const argv[], int	Line 431 sudoers_policy_main(int argc, char * const argv[], int
* unless umask_override is set.	* unless umask_override is set.
*/	*/
if (def_umask != 0777) {	if (def_umask != 0777) {
mode_t mask = def_umask;	cmnd_umask = def_umask;
if (!def_umask_override) {	if (!def_umask_override)
mode_t omask = umask(mask);	cmnd_umask \|= user_umask;
mask \|= omask;
umask(omask);
}
easprintf(&command_info[info_len++], "umask=0%o", (unsigned int)mask);
}	}

if (ISSET(sudo_mode, MODE_LOGIN_SHELL)) {	if (ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
Line 564 sudoers_policy_main(int argc, char * const argv[], int	Line 445 sudoers_policy_main(int argc, char * const argv[], int
*p = '-';	*p = '-';
NewArgv[0] = p;	NewArgv[0] = p;

/* Set cwd to run user's homedir. */
command_info[info_len++] = fmt_string("cwd", runas_pw->pw_dir);

/*	/*
* Newer versions of bash require the --login option to be used	* Newer versions of bash require the --login option to be used
* in conjunction with the -c option even if the shell name starts	* in conjunction with the -c option even if the shell name starts
Line 582 sudoers_policy_main(int argc, char * const argv[], int	Line 460 sudoers_policy_main(int argc, char * const argv[], int
NewArgv[1] = "--login";	NewArgv[1] = "--login";
}	}

#if defined(__linux__) \|\| defined(_AIX)	#if defined(_AIX) \|\| (defined(__linux__) && !defined(HAVE_PAM))
/* Insert system-wide environment variables. */	/* Insert system-wide environment variables. */
read_env_file(_PATH_ENVIRONMENT, TRUE);	read_env_file(_PATH_ENVIRONMENT, true);
#endif	#endif
	#ifdef HAVE_LOGIN_CAP_H
	/* Set environment based on login class. */
	if (login_class) {
	login_cap_t *lc = login_getclass(login_class);
	if (lc != NULL) {
	setusercontext(lc, runas_pw, runas_pw->pw_uid, LOGIN_SETPATH\|LOGIN_SETENV);
	login_close(lc);
	}
	}
	#endif /* HAVE_LOGIN_CAP_H */
}	}

/* Insert system-wide environment variables. */	/* Insert system-wide environment variables. */
if (def_env_file)	if (def_env_file)
read_env_file(def_env_file, FALSE);	read_env_file(def_env_file, false);

/* Insert user-specified environment variables. */	/* Insert user-specified environment variables. */
insert_env_vars(sudo_user.env_vars);	insert_env_vars(sudo_user.env_vars);

/* Restore signal handlers before we exec. */
(void) sigaction(SIGINT, &saved_sa_int, NULL);
(void) sigaction(SIGQUIT, &saved_sa_quit, NULL);
(void) sigaction(SIGTSTP, &saved_sa_tstp, NULL);

if (ISSET(sudo_mode, MODE_EDIT)) {	if (ISSET(sudo_mode, MODE_EDIT)) {
char *editor = find_editor(NewArgc - 1, NewArgv + 1, &edit_argv);	efree(safe_cmnd);
if (editor == NULL)	safe_cmnd = find_editor(NewArgc - 1, NewArgv + 1, &edit_argv);
	if (safe_cmnd == NULL)
goto bad;	goto bad;
command_info[info_len++] = fmt_string("command", editor);
command_info[info_len++] = estrdup("sudoedit=true");
} else {
command_info[info_len++] = fmt_string("command", safe_cmnd);
}	}
if (def_stay_setuid) {
easprintf(&command_info[info_len++], "runas_uid=%u",
(unsigned int)user_uid);
easprintf(&command_info[info_len++], "runas_gid=%u",
(unsigned int)user_gid);
easprintf(&command_info[info_len++], "runas_euid=%u",
(unsigned int)runas_pw->pw_uid);
easprintf(&command_info[info_len++], "runas_egid=%u",
runas_gr ? (unsigned int)runas_gr->gr_gid :
(unsigned int)runas_pw->pw_gid);
} else {
easprintf(&command_info[info_len++], "runas_uid=%u",
(unsigned int)runas_pw->pw_uid);
easprintf(&command_info[info_len++], "runas_gid=%u",
runas_gr ? (unsigned int)runas_gr->gr_gid :
(unsigned int)runas_pw->pw_gid);
}
if (def_preserve_groups) {
command_info[info_len++] = "preserve_groups=true";
} else {
int i, len;
size_t glsize;
char cp, gid_list;
struct group_list *grlist = get_group_list(runas_pw);

glsize = sizeof("runas_groups=") - 1 + (grlist->ngids * (MAX_UID_T_LEN + 1));
gid_list = emalloc(glsize);
memcpy(gid_list, "runas_groups=", sizeof("runas_groups=") - 1);
cp = gid_list + sizeof("runas_groups=") - 1;
for (i = 0; i < grlist->ngids; i++) {
/* XXX - check rval */
len = snprintf(cp, glsize - (cp - gid_list), "%s%u",
i ? "," : "", (unsigned int) grlist->gids[i]);
cp += len;
}
command_info[info_len++] = gid_list;
grlist_delref(grlist);
}
if (def_closefrom >= 0)
easprintf(&command_info[info_len++], "closefrom=%d", def_closefrom);
if (def_noexec)
command_info[info_len++] = estrdup("noexec=true");
if (def_noexec_file)
command_info[info_len++] = fmt_string("noexec_file", def_noexec_file);
if (def_set_utmp)
command_info[info_len++] = estrdup("set_utmp=true");
if (def_use_pty)
command_info[info_len++] = estrdup("use_pty=true");
if (def_utmp_runas)
command_info[info_len++] = fmt_string("utmp_user", runas_pw->pw_name);
#ifdef HAVE_LOGIN_CAP_H
if (lc != NULL)
command_info[info_len++] = fmt_string("login_class", lc->lc_class);
#endif /* HAVE_LOGIN_CAP_H */
#ifdef HAVE_SELINUX
if (user_role != NULL)
command_info[info_len++] = fmt_string("selinux_role", user_role);
if (user_type != NULL)
command_info[info_len++] = fmt_string("selinux_type", user_type);
#endif /* HAVE_SELINUX */

/* Must audit before uid change. */	/* Must audit before uid change. */
audit_success(NewArgv);	audit_success(NewArgv);

*command_infop = command_info;	/* Setup execution environment to pass back to front-end. */
	rval = sudoers_policy_exec_setup(edit_argv ? edit_argv : NewArgv,
	env_get(), cmnd_umask, iolog_path, closure);

*argv_out = edit_argv ? edit_argv : NewArgv;	/* Zero out stashed copy of environment, it is owned by the front-end. */
user_env_out = env_get(); / our private copy */	env_init(NULL);

goto done;	goto done;

bad:	bad:
rval = FALSE;	rval = false;

done:	done:
	fatal_disable_setjmp();
rewind_perms();	rewind_perms();

/* Close the password and group files and free up memory. */	/* Close the password and group files and free up memory. */
sudo_endpwent();	sudo_endpwent();
sudo_endgrent();	sudo_endgrent();

return rval;	debug_return_bool(rval);
}	}

static int
sudoers_policy_check(int argc, char * const argv[], char *env_add[],
char command_infop[], char argv_out[], char **user_env_out[])
{
if (!ISSET(sudo_mode, MODE_EDIT))
SET(sudo_mode, MODE_RUN);

return sudoers_policy_main(argc, argv, 0, env_add, command_infop,
argv_out, user_env_out);
}

static int
sudoers_policy_validate(void)
{
user_cmnd = "validate";
SET(sudo_mode, MODE_VALIDATE);

return sudoers_policy_main(0, NULL, I_VERIFYPW, NULL, NULL, NULL, NULL);
}

static void
sudoers_policy_invalidate(int remove)
{
user_cmnd = "kill";
if (sigsetjmp(error_jmp, 1) == 0) {
remove_timestamp(remove);
plugin_cleanup(0);
}
}

static int
sudoers_policy_list(int argc, char * const argv[], int verbose,
const char *list_user)
{
int rval;

user_cmnd = "list";
if (argc)
SET(sudo_mode, MODE_CHECK);
else
SET(sudo_mode, MODE_LIST);
if (verbose)
long_list = 1;
if (list_user) {
list_pw = sudo_getpwnam(list_user);
if (list_pw == NULL) {
warningx(_("unknown user: %s"), list_user);
return -1;
}
}
rval = sudoers_policy_main(argc, argv, I_LISTPW, NULL, NULL, NULL, NULL);
if (list_user) {
pw_delref(list_pw);
list_pw = NULL;
}

return rval;
}

/*	/*
* Initialize timezone, set umask, fill in ``sudo_user'' struct and	* Initialize timezone and fill in ``sudo_user'' struct.
* load the ``interfaces'' array.
*/	*/
static void	static void
init_vars(char * const envp[])	init_vars(char * const envp[])
{	{
char * const * ep;	char * const * ep;
	debug_decl(init_vars, SUDO_DEBUG_PLUGIN)

#ifdef HAVE_TZSET	sudoers_initlocale(setlocale(LC_ALL, NULL), def_sudoers_locale);
(void) tzset(); /* set the timezone if applicable */
#endif /* HAVE_TZSET */

for (ep = envp; *ep; ep++) {	for (ep = envp; *ep; ep++) {
/* XXX - don't fill in if empty string */	/* XXX - don't fill in if empty string */
Line 786 init_vars(char * const envp[])	Line 548 init_vars(char * const envp[])
}	}

/*	/*
* Get a local copy of the user's struct passwd with the shadow password	* Get a local copy of the user's struct passwd if we don't already
* if necessary. It is assumed that euid is 0 at this point so we	* have one.
* can read the shadow passwd file if necessary.
*/	*/
if ((sudo_user.pw = sudo_getpwuid(user_uid)) == NULL) {	if (sudo_user.pw == NULL) {
/*	if ((sudo_user.pw = sudo_getpwnam(user_name)) == NULL) {
* It is not unusual for users to place "sudo -k" in a .logout	/*
* file which can cause sudo to be run during reboot after the	* It is not unusual for users to place "sudo -k" in a .logout
* YP/NIS/NIS+/LDAP/etc daemon has died.	* file which can cause sudo to be run during reboot after the
*/	* YP/NIS/NIS+/LDAP/etc daemon has died.
if (sudo_mode == MODE_KILL \|\| sudo_mode == MODE_INVALIDATE)	*/
errorx(1, _("unknown uid: %u"), (unsigned int) user_uid);	if (sudo_mode == MODE_KILL \|\| sudo_mode == MODE_INVALIDATE)
	fatalx(_("unknown uid: %u"), (unsigned int) user_uid);

/* Need to make a fake struct passwd for the call to log_error(). */	/* Need to make a fake struct passwd for the call to log_fatal(). */
sudo_user.pw = sudo_fakepwnamid(user_name, user_uid, user_gid);	sudo_user.pw = sudo_mkpwent(user_name, user_uid, user_gid, NULL, NULL);
log_error(0, _("unknown uid: %u"), (unsigned int) user_uid);	log_fatal(0, N_("unknown uid: %u"), (unsigned int) user_uid);
/* NOTREACHED */	/* NOTREACHED */
	}
}	}

/*	/*
* Get group list.	* Get group list.
*/	*/
if (user_group_list == NULL)	if (user_group_list == NULL)
user_group_list = get_group_list(sudo_user.pw);	user_group_list = sudo_get_grlist(sudo_user.pw);

/* Set runas callback. */	/* Set runas callback. */
sudo_defs_table[I_RUNAS_DEFAULT].callback = cb_runas_default;	sudo_defs_table[I_RUNAS_DEFAULT].callback = cb_runas_default;

/* It is now safe to use log_error() and set_perms() */	/* Set locale callback. */
	sudo_defs_table[I_SUDOERS_LOCALE].callback = cb_sudoers_locale;

	/* Set maxseq callback. */
	sudo_defs_table[I_MAXSEQ].callback = io_set_max_sessid;

	/* It is now safe to use log_fatal() and set_perms() */
	debug_return;
}	}

/*	/*
Line 826 set_cmnd(void)	Line 596 set_cmnd(void)
{	{
int rval;	int rval;
char *path = user_path;	char *path = user_path;
	debug_decl(set_cmnd, SUDO_DEBUG_PLUGIN)

/* Resolve the path and return. */	/* Resolve the path and return. */
rval = FOUND;	rval = FOUND;
user_stat = emalloc(sizeof(struct stat));	user_stat = ecalloc(1, sizeof(struct stat));

/* Default value for cmnd, overridden below. */	/* Default value for cmnd, overridden below. */
if (user_cmnd == NULL)	if (user_cmnd == NULL)
Line 880 set_cmnd(void)	Line 651 set_cmnd(void)
for (to = user_args, av = NewArgv + 1; *av; av++) {	for (to = user_args, av = NewArgv + 1; *av; av++) {
n = strlcpy(to, *av, size - (to - user_args));	n = strlcpy(to, *av, size - (to - user_args));
if (n >= size - (to - user_args))	if (n >= size - (to - user_args))
errorx(1, _("internal error, set_cmnd() overflow"));	fatalx(_("internal error, %s overflow"), "set_cmnd()");
to += n;	to += n;
*to++ = ' ';	*to++ = ' ';
}	}
Line 888 set_cmnd(void)	Line 659 set_cmnd(void)
}	}
}	}
}	}
if (strlen(user_cmnd) >= PATH_MAX)	if (strlen(user_cmnd) >= PATH_MAX) {
errorx(1, _("%s: %s"), user_cmnd, strerror(ENAMETOOLONG));	errno = ENAMETOOLONG;
	fatal("%s", user_cmnd);
	}

if ((user_base = strrchr(user_cmnd, '/')) != NULL)	if ((user_base = strrchr(user_cmnd, '/')) != NULL)
user_base++;	user_base++;
Line 897 set_cmnd(void)	Line 670 set_cmnd(void)
user_base = user_cmnd;	user_base = user_cmnd;

if (!update_defaults(SETDEF_CMND))	if (!update_defaults(SETDEF_CMND))
log_error(NO_STDERR\|NO_EXIT, _("problem with defaults entries"));	log_warning(NO_STDERR, N_("problem with defaults entries"));

return rval;	debug_return_int(rval);
}	}

/*	/*
Line 907 set_cmnd(void)	Line 680 set_cmnd(void)
* Returns a handle to the sudoers file or NULL on error.	* Returns a handle to the sudoers file or NULL on error.
*/	*/
FILE *	FILE *
open_sudoers(const char sudoers, int doedit, int keepopen)	open_sudoers(const char sudoers, bool doedit, bool keepopen)
{	{
struct stat statbuf;	struct stat sb;
FILE *fp = NULL;	FILE *fp = NULL;
int rootstat;	debug_decl(open_sudoers, SUDO_DEBUG_PLUGIN)

/*	set_perms(PERM_SUDOERS);
* Fix the mode and group on sudoers file from old default.
* Only works if file system is readable/writable by root.
*/
if ((rootstat = stat_sudoers(sudoers, &statbuf)) == 0 &&
sudoers_uid == statbuf.st_uid && sudoers_mode != 0400 &&
(statbuf.st_mode & 0007777) == 0400) {

if (chmod(sudoers, sudoers_mode) == 0) {	switch (sudo_secure_file(sudoers, sudoers_uid, sudoers_gid, &sb)) {
warningx(_("fixed mode on %s"), sudoers);	case SUDO_PATH_SECURE:
SET(statbuf.st_mode, sudoers_mode);	/*
if (statbuf.st_gid != sudoers_gid) {	* If we are expecting sudoers to be group readable but
if (chown(sudoers, (uid_t) -1, sudoers_gid) == 0) {	* it is not, we must open the file as root, not uid 1.
warningx(_("set group on %s"), sudoers);	*/
statbuf.st_gid = sudoers_gid;	if (sudoers_uid == ROOT_UID && (sudoers_mode & S_IRGRP)) {
} else	if ((sb.st_mode & S_IRGRP) == 0) {
warning(_("unable to set group on %s"), sudoers);	restore_perms();
	set_perms(PERM_ROOT);
	}
}	}
} else	/*
warning(_("unable to fix mode on %s"), sudoers);	* Open sudoers and make sure we can read it so we can present
	* the user with a reasonable error message (unlike the lexer).
	*/
	if ((fp = fopen(sudoers, "r")) == NULL) {
	log_warning(USE_ERRNO, N_("unable to open %s"), sudoers);
	} else {
	if (sb.st_size != 0 && fgetc(fp) == EOF) {
	log_warning(USE_ERRNO, N_("unable to read %s"),
	sudoers);
	fclose(fp);
	fp = NULL;
	} else {
	/* Rewind fp and set close on exec flag. */
	rewind(fp);
	(void) fcntl(fileno(fp), F_SETFD, 1);
	}
	}
	break;
	case SUDO_PATH_MISSING:
	log_warning(USE_ERRNO, N_("unable to stat %s"), sudoers);
	break;
	case SUDO_PATH_BAD_TYPE:
	log_warning(0, N_("%s is not a regular file"), sudoers);
	break;
	case SUDO_PATH_WRONG_OWNER:
	log_warning(0, N_("%s is owned by uid %u, should be %u"),
	sudoers, (unsigned int) sb.st_uid, (unsigned int) sudoers_uid);
	break;
	case SUDO_PATH_WORLD_WRITABLE:
	log_warning(0, N_("%s is world writable"), sudoers);
	break;
	case SUDO_PATH_GROUP_WRITABLE:
	log_warning(0, N_("%s is owned by gid %u, should be %u"),
	sudoers, (unsigned int) sb.st_gid, (unsigned int) sudoers_gid);
	break;
	default:
	/* NOTREACHED */
	break;
}	}

/*
* Sanity checks on sudoers file. Must be done as sudoers
* file owner. We already did a stat as root, so use that
* data if we can't stat as sudoers file owner.
*/
set_perms(PERM_SUDOERS);

if (rootstat != 0 && stat_sudoers(sudoers, &statbuf) != 0)
log_error(USE_ERRNO\|NO_EXIT, _("unable to stat %s"), sudoers);
else if (!S_ISREG(statbuf.st_mode))
log_error(NO_EXIT, _("%s is not a regular file"), sudoers);
else if ((statbuf.st_mode & 07577) != sudoers_mode)
log_error(NO_EXIT, _("%s is mode 0%o, should be 0%o"), sudoers,
(unsigned int) (statbuf.st_mode & 07777),
(unsigned int) sudoers_mode);
else if (statbuf.st_uid != sudoers_uid)
log_error(NO_EXIT, _("%s is owned by uid %u, should be %u"), sudoers,
(unsigned int) statbuf.st_uid, (unsigned int) sudoers_uid);
else if (statbuf.st_gid != sudoers_gid && ISSET(statbuf.st_mode, S_IRGRP\|S_IWGRP))
log_error(NO_EXIT, _("%s is owned by gid %u, should be %u"), sudoers,
(unsigned int) statbuf.st_gid, (unsigned int) sudoers_gid);
else if ((fp = fopen(sudoers, "r")) == NULL)
log_error(USE_ERRNO\|NO_EXIT, _("unable to open %s"), sudoers);
else {
/*
* Make sure we can actually read sudoers so we can present the
* user with a reasonable error message (unlike the lexer).
*/
if (statbuf.st_size != 0 && fgetc(fp) == EOF) {
log_error(USE_ERRNO\|NO_EXIT, _("unable to read %s"), sudoers);
fclose(fp);
fp = NULL;
}
}

if (fp != NULL) {
rewind(fp);
(void) fcntl(fileno(fp), F_SETFD, 1);
}

restore_perms(); /* change back to root */	restore_perms(); /* change back to root */
return fp;
	debug_return_ptr(fp);
}	}

#ifdef HAVE_LOGIN_CAP_H	#ifdef HAVE_LOGIN_CAP_H
static void	static void
set_loginclass(struct passwd *pw)	set_loginclass(struct passwd *pw)
{	{
int errflags;	const int errflags = NO_MAIL\|MSG_ONLY;
	login_cap_t *lc;
	debug_decl(set_loginclass, SUDO_DEBUG_PLUGIN)

/*	if (!def_use_loginclass)
* Don't make it a fatal error if the user didn't specify the login	debug_return;
* class themselves. We do this because if login.conf gets
* corrupted we want the admin to be able to use sudo to fix it.
*/
if (login_class)
errflags = NO_MAIL\|MSG_ONLY;
else
errflags = NO_MAIL\|MSG_ONLY\|NO_EXIT;

if (login_class && strcmp(login_class, "-") != 0) {	if (login_class && strcmp(login_class, "-") != 0) {
if (user_uid != 0 &&	if (user_uid != 0 &&
strcmp(runas_user ? runas_user : def_runas_default, "root") != 0)	strcmp(runas_user ? runas_user : def_runas_default, "root") != 0)
errorx(1, _("only root can use `-c %s'"), login_class);	fatalx(_("only root can use `-c %s'"), login_class);
} else {	} else {
login_class = pw->pw_class;	login_class = pw->pw_class;
if (!login_class \|\| !*login_class)	if (!login_class \|\| !*login_class)
Line 1006 set_loginclass(struct passwd *pw)	Line 768 set_loginclass(struct passwd *pw)
(pw->pw_uid == 0) ? LOGIN_DEFROOTCLASS : LOGIN_DEFCLASS;	(pw->pw_uid == 0) ? LOGIN_DEFROOTCLASS : LOGIN_DEFCLASS;
}	}

	/* Make sure specified login class is valid. */
lc = login_getclass(login_class);	lc = login_getclass(login_class);
if (!lc \|\| !lc->lc_class \|\| strcmp(lc->lc_class, login_class) != 0) {	if (!lc \|\| !lc->lc_class \|\| strcmp(lc->lc_class, login_class) != 0) {
log_error(errflags, _("unknown login class: %s"), login_class);	/*
if (!lc)	* Don't make it a fatal error if the user didn't specify the login
lc = login_getclass(NULL); /* needed for login_getstyle() later */	* class themselves. We do this because if login.conf gets
	* corrupted we want the admin to be able to use sudo to fix it.
	*/
	if (login_class)
	log_fatal(errflags, N_("unknown login class: %s"), login_class);
	else
	log_warning(errflags, N_("unknown login class: %s"), login_class);
	def_use_loginclass = false;
}	}
	login_close(lc);
	debug_return;
}	}
#else	#else
static void	static void
Line 1020 set_loginclass(struct passwd *pw)	Line 792 set_loginclass(struct passwd *pw)
}	}
#endif /* HAVE_LOGIN_CAP_H */	#endif /* HAVE_LOGIN_CAP_H */

	#ifndef AI_FQDN
	# define AI_FQDN AI_CANONNAME
	#endif

/*	/*
* Look up the fully qualified domain name and set user_host and user_shost.	* Look up the fully qualified domain name and set user_host and user_shost.
	* Use AI_FQDN if available since "canonical" is not always the same as fqdn.
*/	*/
void	static void
set_fqdn(void)	set_fqdn(void)
{	{
#ifdef HAVE_GETADDRINFO
struct addrinfo *res0, hint;	struct addrinfo *res0, hint;
#else
struct hostent *hp;
#endif
char *p;	char *p;
	debug_decl(set_fqdn, SUDO_DEBUG_PLUGIN)

#ifdef HAVE_GETADDRINFO
zero_bytes(&hint, sizeof(hint));	zero_bytes(&hint, sizeof(hint));
hint.ai_family = PF_UNSPEC;	hint.ai_family = PF_UNSPEC;
hint.ai_flags = AI_CANONNAME;	hint.ai_flags = AI_FQDN;
if (getaddrinfo(user_host, NULL, &hint, &res0) != 0) {	if (getaddrinfo(user_host, NULL, &hint, &res0) != 0) {
#else	log_warning(MSG_ONLY, N_("unable to resolve host %s"), user_host);
if (!(hp = gethostbyname(user_host))) {
#endif
log_error(MSG_ONLY\|NO_EXIT,
_("unable to resolve host %s"), user_host);
} else {	} else {
if (user_shost != user_host)	if (user_shost != user_host)
efree(user_shost);	efree(user_shost);
efree(user_host);	efree(user_host);
#ifdef HAVE_GETADDRINFO
user_host = estrdup(res0->ai_canonname);	user_host = estrdup(res0->ai_canonname);
freeaddrinfo(res0);	freeaddrinfo(res0);
#else	if ((p = strchr(user_host, '.')) != NULL)
user_host = estrdup(hp->h_name);	user_shost = estrndup(user_host, (size_t)(p - user_host));
#endif	else
	user_shost = user_host;
}	}
if ((p = strchr(user_host, '.')) != NULL)	debug_return;
user_shost = estrndup(user_host, (size_t)(p - user_host));
else
user_shost = user_host;
}	}

/*	/*
* Get passwd entry for the user we are going to run commands as	* Get passwd entry for the user we are going to run commands as
* and store it in runas_pw. By default, commands run as "root".	* and store it in runas_pw. By default, commands run as "root".
*/	*/
void	static void
set_runaspw(const char *user)	set_runaspw(const char *user)
{	{
	debug_decl(set_runaspw, SUDO_DEBUG_PLUGIN)

if (runas_pw != NULL)	if (runas_pw != NULL)
pw_delref(runas_pw);	sudo_pw_delref(runas_pw);
if (*user == '#') {	if (*user == '#') {
if ((runas_pw = sudo_getpwuid(atoi(user + 1))) == NULL)	if ((runas_pw = sudo_getpwuid(atoi(user + 1))) == NULL)
runas_pw = sudo_fakepwnam(user, runas_gr ? runas_gr->gr_gid : 0);	runas_pw = sudo_fakepwnam(user, runas_gr ? runas_gr->gr_gid : 0);
} else {	} else {
if ((runas_pw = sudo_getpwnam(user)) == NULL)	if ((runas_pw = sudo_getpwnam(user)) == NULL)
log_error(NO_MAIL\|MSG_ONLY, _("unknown user: %s"), user);	log_fatal(NO_MAIL\|MSG_ONLY, N_("unknown user: %s"), user);
}	}
	debug_return;
}	}

/*	/*
Line 1085 set_runaspw(const char *user)	Line 854 set_runaspw(const char *user)
static void	static void
set_runasgr(const char *group)	set_runasgr(const char *group)
{	{
	debug_decl(set_runasgr, SUDO_DEBUG_PLUGIN)

if (runas_gr != NULL)	if (runas_gr != NULL)
gr_delref(runas_gr);	sudo_gr_delref(runas_gr);
if (*group == '#') {	if (*group == '#') {
if ((runas_gr = sudo_getgrgid(atoi(group + 1))) == NULL)	if ((runas_gr = sudo_getgrgid(atoi(group + 1))) == NULL)
runas_gr = sudo_fakegrnam(group);	runas_gr = sudo_fakegrnam(group);
} else {	} else {
if ((runas_gr = sudo_getgrnam(group)) == NULL)	if ((runas_gr = sudo_getgrnam(group)) == NULL)
log_error(NO_MAIL\|MSG_ONLY, _("unknown group: %s"), group);	log_fatal(NO_MAIL\|MSG_ONLY, N_("unknown group: %s"), group);
}	}
	debug_return;
}	}

/*	/*
Line 1105 cb_runas_default(const char *user)	Line 877 cb_runas_default(const char *user)
/* Only reset runaspw if user didn't specify one. */	/* Only reset runaspw if user didn't specify one. */
if (!runas_user && !runas_group)	if (!runas_user && !runas_group)
set_runaspw(user);	set_runaspw(user);
return TRUE;	return true;
}	}

/*	/*
* Cleanup hook for error()/errorx()	* Callback for sudoers_locale sudoers setting.
*/	*/
void
plugin_cleanup(int gotsignal)
{
struct sudo_nss *nss;

if (!gotsignal) {
if (snl != NULL) {
tq_foreach_fwd(snl, nss)
nss->close(nss);
}
if (def_group_plugin)
group_plugin_unload();
sudo_endpwent();
sudo_endgrent();
}
}

static int	static int
sudoers_policy_version(int verbose)	cb_sudoers_locale(const char *locale)
{	{
if (sigsetjmp(error_jmp, 1)) {	sudoers_initlocale(NULL, locale);
/* error recovery via error(), errorx() or log_error() */	return true;
return -1;
}

sudo_printf(SUDO_CONV_INFO_MSG, _("Sudoers policy plugin version %s\n"),
PACKAGE_VERSION);
sudo_printf(SUDO_CONV_INFO_MSG, _("Sudoers file grammar version %d\n"),
SUDOERS_GRAMMAR_VERSION);

if (verbose) {
sudo_printf(SUDO_CONV_INFO_MSG, _("\nSudoers path: %s\n"), sudoers_file);
#ifdef HAVE_LDAP
# ifdef _PATH_NSSWITCH_CONF
sudo_printf(SUDO_CONV_INFO_MSG, _("nsswitch path: %s\n"), _PATH_NSSWITCH_CONF);
# endif
sudo_printf(SUDO_CONV_INFO_MSG, _("ldap.conf path: %s\n"), _PATH_LDAP_CONF);
sudo_printf(SUDO_CONV_INFO_MSG, _("ldap.secret path: %s\n"), _PATH_LDAP_SECRET);
#endif
dump_auth_methods();
dump_defaults();
sudo_printf(SUDO_CONV_INFO_MSG, "\n");
dump_interfaces(interfaces_string);
sudo_printf(SUDO_CONV_INFO_MSG, "\n");
}
return TRUE;
}	}

static int	/*
deserialize_info(char * const settings[], char * const user_info[])	* Cleanup hook for fatal()/fatalx()
	*/
	void
	sudoers_cleanup(void)
{	{
char * const *cur;	struct sudo_nss *nss;
const char p, groups = NULL;	debug_decl(sudoers_cleanup, SUDO_DEBUG_PLUGIN)
int flags = 0;

#define MATCHES(s, v) (strncmp(s, v, sizeof(v) - 1) == 0)	if (snl != NULL) {
	tq_foreach_fwd(snl, nss)
/* Parse command line settings. */	nss->close(nss);
user_closefrom = -1;
for (cur = settings; *cur != NULL; cur++) {
if (MATCHES(*cur, "closefrom=")) {
user_closefrom = atoi(*cur + sizeof("closefrom=") - 1);
continue;
}
if (MATCHES(*cur, "debug_level=")) {
debug_level = atoi(*cur + sizeof("debug_level=") - 1);
continue;
}
if (MATCHES(*cur, "runas_user=")) {
runas_user = *cur + sizeof("runas_user=") - 1;
continue;
}
if (MATCHES(*cur, "runas_group=")) {
runas_group = *cur + sizeof("runas_group=") - 1;
continue;
}
if (MATCHES(*cur, "prompt=")) {
user_prompt = *cur + sizeof("prompt=") - 1;
def_passprompt_override = TRUE;
continue;
}
if (MATCHES(*cur, "set_home=")) {
if (atobool(*cur + sizeof("set_home=") - 1) == TRUE)
SET(flags, MODE_RESET_HOME);
continue;
}
if (MATCHES(*cur, "preserve_environment=")) {
if (atobool(*cur + sizeof("preserve_environment=") - 1) == TRUE)
SET(flags, MODE_PRESERVE_ENV);
continue;
}
if (MATCHES(*cur, "run_shell=")) {
if (atobool(*cur + sizeof("run_shell=") - 1) == TRUE)
SET(flags, MODE_SHELL);
continue;
}
if (MATCHES(*cur, "login_shell=")) {
if (atobool(*cur + sizeof("login_shell=") - 1) == TRUE) {
SET(flags, MODE_LOGIN_SHELL);
def_env_reset = TRUE;
}
continue;
}
if (MATCHES(*cur, "implied_shell=")) {
if (atobool(*cur + sizeof("implied_shell=") - 1) == TRUE)
SET(flags, MODE_IMPLIED_SHELL);
continue;
}
if (MATCHES(*cur, "preserve_groups=")) {
if (atobool(*cur + sizeof("preserve_groups=") - 1) == TRUE)
SET(flags, MODE_PRESERVE_GROUPS);
continue;
}
if (MATCHES(*cur, "ignore_ticket=")) {
if (atobool(*cur + sizeof("ignore_ticket=") - 1) == TRUE)
SET(flags, MODE_IGNORE_TICKET);
continue;
}
if (MATCHES(*cur, "noninteractive=")) {
if (atobool(*cur + sizeof("noninteractive=") - 1) == TRUE)
SET(flags, MODE_NONINTERACTIVE);
continue;
}
if (MATCHES(*cur, "sudoedit=")) {
if (atobool(*cur + sizeof("sudoedit=") - 1) == TRUE)
SET(flags, MODE_EDIT);
continue;
}
if (MATCHES(*cur, "login_class=")) {
login_class = *cur + sizeof("login_class=") - 1;
def_use_loginclass = TRUE;
continue;
}
#ifdef HAVE_SELINUX
if (MATCHES(*cur, "selinux_role=")) {
user_role = *cur + sizeof("selinux_role=") - 1;
continue;
}
if (MATCHES(*cur, "selinux_type=")) {
user_type = *cur + sizeof("selinux_type=") - 1;
continue;
}
#endif /* HAVE_SELINUX */
#ifdef HAVE_BSD_AUTH_H
if (MATCHES(*cur, "bsdauth_type=")) {
login_style = *cur + sizeof("bsdauth_type=") - 1;
continue;
}
#endif /* HAVE_BSD_AUTH_H */
#if !defined(HAVE_GETPROGNAME) && !defined(HAVE___PROGNAME)
if (MATCHES(*cur, "progname=")) {
setprogname(*cur + sizeof("progname=") - 1);
continue;
}
#endif
if (MATCHES(*cur, "network_addrs=")) {
interfaces_string = *cur + sizeof("network_addrs=") - 1;
set_interfaces(interfaces_string);
continue;
}
if (MATCHES(*cur, "sudoers_file=")) {
sudoers_file = *cur + sizeof("sudoers_file=") - 1;
continue;
}
if (MATCHES(*cur, "sudoers_uid=")) {
sudoers_uid = (uid_t) atoi(*cur + sizeof("sudoers_uid=") - 1);
continue;
}
if (MATCHES(*cur, "sudoers_gid=")) {
sudoers_gid = (gid_t) atoi(*cur + sizeof("sudoers_gid=") - 1);
continue;
}
if (MATCHES(*cur, "sudoers_mode=")) {
sudoers_mode = (mode_t) strtol(*cur + sizeof("sudoers_mode=") - 1,
NULL, 8);
continue;
}
}	}
	if (def_group_plugin)
	group_plugin_unload();
	sudo_endpwent();
	sudo_endgrent();

for (cur = user_info; *cur != NULL; cur++) {	debug_return;
if (MATCHES(*cur, "user=")) {
user_name = estrdup(*cur + sizeof("user=") - 1);
continue;
}
if (MATCHES(*cur, "uid=")) {
user_uid = (uid_t) atoi(*cur + sizeof("uid=") - 1);
continue;
}
if (MATCHES(*cur, "gid=")) {
p = *cur + sizeof("gid=") - 1;
user_gid = (gid_t) atoi(p);
continue;
}
if (MATCHES(*cur, "groups=")) {
groups = *cur + sizeof("groups=") - 1;
continue;
}
if (MATCHES(*cur, "cwd=")) {
user_cwd = estrdup(*cur + sizeof("cwd=") - 1);
continue;
}
if (MATCHES(*cur, "tty=")) {
user_tty = user_ttypath = estrdup(*cur + sizeof("tty=") - 1);
if (strncmp(user_tty, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
user_tty += sizeof(_PATH_DEV) - 1;
continue;
}
if (MATCHES(*cur, "host=")) {
user_host = user_shost = estrdup(*cur + sizeof("host=") - 1);
if ((p = strchr(user_host, '.')))
user_shost = estrndup(user_host, (size_t)(p - user_host));
continue;
}
if (MATCHES(*cur, "lines=")) {
sudo_user.lines = atoi(*cur + sizeof("lines=") - 1);
continue;
}
if (MATCHES(*cur, "cols=")) {
sudo_user.cols = atoi(*cur + sizeof("cols=") - 1);
continue;
}
}
if (user_cwd == NULL)
user_cwd = "unknown";
if (user_tty == NULL)
user_tty = "unknown"; /* user_ttypath remains NULL */

if (groups != NULL && groups[0] != '\0') {
const char *cp;
GETGROUPS_T *gids;
int ngids;

/* Count number of groups, including passwd gid. */
ngids = 2;
for (cp = groups; *cp != '\0'; cp++) {
if (*cp == ',')
ngids++;
}

/* The first gid in the list is the passwd group gid. */
gids = emalloc2(ngids, sizeof(GETGROUPS_T));
gids[0] = user_gid;
ngids = 1;
cp = groups;
for (;;) {
gids[ngids] = atoi(cp);
if (gids[0] != gids[ngids])
ngids++;
cp = strchr(cp, ',');
if (cp == NULL)
break;
cp++; /* skip over comma */
}
set_group_list(user_name, gids, ngids);
efree(gids);
}

#undef MATCHES
return flags;
}	}

static char *	static char *
resolve_editor(char editor, int nfiles, char files, char **argv_out)	resolve_editor(const char ed, size_t edlen, int nfiles, char files, char **argv_out)
{	{
char cp, nargv, editor_path = NULL;	char cp, nargv, editor, *editor_path = NULL;
int ac, i, nargc, wasblank;	int ac, i, nargc;
	bool wasblank;
	debug_decl(resolve_editor, SUDO_DEBUG_PLUGIN)

editor = estrdup(editor); /* becomes part of argv_out */	/* Note: editor becomes part of argv_out and is not freed. */
	editor = emalloc(edlen + 1);
	memcpy(editor, ed, edlen);
	editor[edlen] = '\0';

/*	/*
* Split editor into an argument vector; editor is reused (do not free).	* Split editor into an argument vector; editor is reused (do not free).
Line 1386 resolve_editor(char editor, int nfiles, char *files,	Line 930 resolve_editor(char editor, int nfiles, char *files,
* line args so look for those and alloc space for them too.	* line args so look for those and alloc space for them too.
*/	*/
nargc = 1;	nargc = 1;
for (wasblank = FALSE, cp = editor; *cp != '\0'; cp++) {	for (wasblank = false, cp = editor; *cp != '\0'; cp++) {
if (isblank((unsigned char) *cp))	if (isblank((unsigned char) *cp))
wasblank = TRUE;	wasblank = true;
else if (wasblank) {	else if (wasblank) {
wasblank = FALSE;	wasblank = false;
nargc++;	nargc++;
}	}
}	}
Line 1399 resolve_editor(char editor, int nfiles, char *files,	Line 943 resolve_editor(char editor, int nfiles, char *files,
if (cp == NULL \|\|	if (cp == NULL \|\|
find_path(cp, &editor_path, NULL, getenv("PATH"), 0) != FOUND) {	find_path(cp, &editor_path, NULL, getenv("PATH"), 0) != FOUND) {
efree(editor);	efree(editor);
return NULL;	debug_return_str(NULL);
}	}
nargv = (char *) emalloc2(nargc + 1 + nfiles + 1, sizeof(char ));	nargv = (char *) emalloc2(nargc + 1 + nfiles + 1, sizeof(char ));
for (ac = 0; cp != NULL && ac < nargc; ac++) {	for (ac = 0; cp != NULL && ac < nargc; ac++) {
Line 1412 resolve_editor(char editor, int nfiles, char *files,	Line 956 resolve_editor(char editor, int nfiles, char *files,
nargv[ac] = NULL;	nargv[ac] = NULL;

*argv_out = nargv;	*argv_out = nargv;
return editor_path;	debug_return_str(editor_path);
}	}

/*	/*
Line 1423 resolve_editor(char editor, int nfiles, char *files,	Line 967 resolve_editor(char editor, int nfiles, char *files,
static char *	static char *
find_editor(int nfiles, char files, char *argv_out)	find_editor(int nfiles, char files, char *argv_out)
{	{
char cp, editor, editor_path = NULL, ev, ev0[4];	const char cp, ep, *editor;
	char editor_path = NULL, ev, ev0[4];
	size_t len;
	debug_decl(find_editor, SUDO_DEBUG_PLUGIN)

/*	/*
* If any of SUDO_EDITOR, VISUAL or EDITOR are set, choose the first one.	* If any of SUDO_EDITOR, VISUAL or EDITOR are set, choose the first one.
Line 1432 find_editor(int nfiles, char files, char *argv_out	Line 979 find_editor(int nfiles, char files, char *argv_out
ev0[1] = "VISUAL";	ev0[1] = "VISUAL";
ev0[2] = "EDITOR";	ev0[2] = "EDITOR";
ev0[3] = NULL;	ev0[3] = NULL;
for (ev = ev0; *ev != NULL; ev++) {	for (ev = ev0; editor_path == NULL && *ev != NULL; ev++) {
if ((editor = getenv(ev)) != NULL && editor != '\0') {	if ((editor = getenv(ev)) != NULL && editor != '\0') {
editor_path = resolve_editor(editor, nfiles, files, argv_out);	editor_path = resolve_editor(editor, strlen(editor), nfiles,
if (editor_path != NULL)	files, argv_out);
break;
}	}
}	}
if (editor_path == NULL) {	if (editor_path == NULL) {
/* def_editor could be a path, split it up */	/* def_editor could be a path, split it up, avoiding strtok() */
editor = estrdup(def_editor);	cp = editor = def_editor;
cp = strtok(editor, ":");	do {
while (cp != NULL && editor_path == NULL) {	if ((ep = strchr(cp, ':')) != NULL)
editor_path = resolve_editor(cp, nfiles, files, argv_out);	len = ep - cp;
cp = strtok(NULL, ":");	else
}	len = strlen(cp);
if (editor_path)	editor_path = resolve_editor(cp, len, nfiles, files, argv_out);
efree(editor);	cp = ep + 1;
	} while (ep != NULL && editor_path == NULL);
}	}
if (!editor_path) {	if (!editor_path) {
audit_failure(NewArgv, _("%s: command not found"), editor);	audit_failure(NewArgv, N_("%s: command not found"), editor);
warningx(_("%s: command not found"), editor);	warningx(_("%s: command not found"), editor);
}	}
return editor_path;	debug_return_str(editor_path);
}	}

#ifdef USE_ADMIN_FLAG	#ifdef USE_ADMIN_FLAG
Line 1464 create_admin_success_flag(void)	Line 1011 create_admin_success_flag(void)
struct stat statbuf;	struct stat statbuf;
char flagfile[PATH_MAX];	char flagfile[PATH_MAX];
int fd, n;	int fd, n;
	debug_decl(create_admin_success_flag, SUDO_DEBUG_PLUGIN)

/* Check whether the user is in the admin group. */	/* Check whether the user is in the admin group. */
if (!user_in_group(sudo_user.pw, "admin"))	if (!user_in_group(sudo_user.pw, "admin"))
return;	debug_return;

/* Build path to flag file. */	/* Build path to flag file. */
n = snprintf(flagfile, sizeof(flagfile), "%s/.sudo_as_admin_successful",	n = snprintf(flagfile, sizeof(flagfile), "%s/.sudo_as_admin_successful",
user_dir);	user_dir);
if (n <= 0 \|\| n >= sizeof(flagfile))	if (n <= 0 \|\| n >= sizeof(flagfile))
return;	debug_return;

/* Create admin flag file if it doesn't already exist. */	/* Create admin flag file if it doesn't already exist. */
set_perms(PERM_USER);	set_perms(PERM_USER);
Line 1482 create_admin_success_flag(void)	Line 1030 create_admin_success_flag(void)
close(fd);	close(fd);
}	}
restore_perms();	restore_perms();
	debug_return;
}	}
#else /* !USE_ADMIN_FLAG */	#else /* !USE_ADMIN_FLAG */
static void	static void
Line 1491 create_admin_success_flag(void)	Line 1040 create_admin_success_flag(void)
}	}
#endif /* USE_ADMIN_FLAG */	#endif /* USE_ADMIN_FLAG */

struct policy_plugin sudoers_policy = {	static bool
SUDO_POLICY_PLUGIN,	tty_present(void)
SUDO_API_VERSION,	{
sudoers_policy_open,	#if defined(HAVE_STRUCT_KINFO_PROC2_P_TDEV) \|\| defined(HAVE_STRUCT_KINFO_PROC_P_TDEV) \|\| defined(HAVE_STRUCT_KINFO_PROC_KI_TDEV) \|\| defined(HAVE_STRUCT_KINFO_PROC_KP_EPROC_E_TDEV) \|\| defined(HAVE_STRUCT_PSINFO_PR_TTYDEV) \|\| defined(HAVE_PSTAT_GETPROC) \|\| defined(__linux__)
sudoers_policy_close,	return user_ttypath != NULL;
sudoers_policy_version,	#else
sudoers_policy_check,	int fd = open(_PATH_TTY, O_RDWR\|O_NOCTTY);
sudoers_policy_list,	if (fd != -1)
sudoers_policy_validate,	close(fd);
sudoers_policy_invalidate,	return fd != -1;
sudoers_policy_init_session	#endif
};	}

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>

Removed from v.1.1
changed lines
	Added in v.1.1.1.4