/*
- * 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
* purpose with or without fee is hereby granted, provided that the above
* Sponsored in part by the Defense Advanced Research Projects
* Agency (DARPA) and Air Force Research Laboratory, Air Force
* 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
#include <sys/types.h>
#include <sys/stat.h>
-#include <sys/param.h>
#include <sys/socket.h>
#include <stdio.h>
#ifdef STDC_HEADERS
#include <signal.h>
#include <grp.h>
#include <time.h>
-#ifdef HAVE_SETLOCALE
-# include <locale.h>
-#endif
-#include <netinet/in.h>
#include <netdb.h>
#ifdef HAVE_LOGIN_CAP_H
# include <login_cap.h>
# ifndef LOGIN_DEFROOTCLASS
# define LOGIN_DEFROOTCLASS "daemon"
# endif
+# ifndef LOGIN_SETENV
+# define LOGIN_SETENV 0
+# endif
#endif
#ifdef HAVE_SELINUX
# include <selinux/selinux.h>
#endif
-#ifdef HAVE_MBR_CHECK_MEMBERSHIP
-# include <membership.h>
-#endif
#include <ctype.h>
-#include <setjmp.h>
+#ifndef HAVE_GETADDRINFO
+# include "compat/getaddrinfo.h"
+#endif
#include "sudoers.h"
-#include "lbuf.h"
-#include "interfaces.h"
-#include "sudoers_version.h"
#include "auth/sudo_auth.h"
+#include "secure_path.h"
/*
* Prototypes
*/
-static void init_vars(char * const *);
-static int set_cmnd(int);
-static void set_loginclass(struct passwd *);
-static void set_runasgr(char *);
-static void set_runaspw(char *);
-static int sudoers_policy_version(int verbose);
-static int deserialize_info(char * const settings[], char * const user_info[]);
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 void create_admin_success_flag(void);
-
-/* XXX */
-extern int runas_ngroups;
-extern GETGROUPS_T *runas_groups;
+static void init_vars(char * const *);
+static void set_fqdn(void);
+static void set_loginclass(struct passwd *);
+static void set_runasgr(const char *);
+static void set_runaspw(const char *);
+static bool tty_present(void);
/*
* 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 passwd *list_pw;
-struct interface *interfaces;
int long_list;
-int debug_level;
uid_t timestamp_uid;
extern int errorlineno;
-extern int parse_error;
+extern bool parse_error;
extern char *errorfile;
-#ifdef HAVE_LOGIN_CAP_H
-login_cap_t *lc;
-#endif /* HAVE_LOGIN_CAP_H */
#ifdef HAVE_BSD_AUTH_H
char *login_style;
#endif /* HAVE_BSD_AUTH_H */
-sudo_conv_t sudo_conv;
-sudo_printf_t sudo_printf;
int sudo_mode;
static char *prev_user;
static char *runas_user;
static char *runas_group;
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 */
int NewArgc;
char **NewArgv;
-/* plugin_error.c */
-extern sigjmp_buf error_jmp;
-
-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[])
+int
+sudoers_policy_init(void *info, char * const envp[])
{
volatile int sources = 0;
- sigaction_t sa;
- struct sudo_nss *nss;
-
- if (!sudo_conv)
- sudo_conv = conversation;
- if (!sudo_printf)
- sudo_printf = plugin_printf;
+ struct sudo_nss *nss, *nss_next;
+ debug_decl(sudoers_policy_init, SUDO_DEBUG_PLUGIN)
- if (sigsetjmp(error_jmp, 1)) {
- /* called via error(), errorx() or log_error() */
- rewind_perms();
- return -1;
- }
-
- /*
- * 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);
+ bindtextdomain("sudoers", LOCALEDIR);
sudo_setpwent();
sudo_setgrent();
+ /* Register fatal/fatalx callback. */
+ fatal_callback_register(sudoers_cleanup);
+
/* Initialize environment functions (including replacements). */
env_init(envp);
/* Setup defaults data structures. */
init_defaults();
- /* Parse settings and user_info */
- sudo_mode = deserialize_info(settings, user_info);
+ /* Parse info from front-end. */
+ sudo_mode = sudoers_policy_deserialize_info(info, &runas_user, &runas_group);
init_vars(envp); /* XXX - move this later? */
/* Parse nsswitch.conf for sudoers order. */
snl = sudo_read_nss();
+ /* LDAP or NSS may modify the euid so we need to be root for the open. */
set_perms(PERM_INITIAL);
+ set_perms(PERM_ROOT);
/* Open and parse sudoers, set global defaults */
- tq_foreach_fwd(snl, nss) {
- if (nss->open(nss) == 0 && nss->parse(nss) == 0) {
- sources++;
- if (nss->setdefs(nss) != 0)
- log_error(NO_STDERR|NO_EXIT, "problem with defaults entries");
- }
+ for (nss = snl->first; nss != NULL; nss = nss_next) {
+ nss_next = nss->next;
+ if (nss->open(nss) == 0 && nss->parse(nss) == 0) {
+ sources++;
+ if (nss->setdefs(nss) != 0)
+ log_warning(NO_STDERR, N_("problem with defaults entries"));
+ } else {
+ tq_remove(snl, nss);
+ }
}
if (sources == 0) {
- warningx("no valid sudoers sources found, quitting");
- return -1;
+ warningx(_("no valid sudoers sources found, quitting"));
+ debug_return_bool(-1);
}
/* XXX - collect post-sudoers parse settings into a function */
/*
- * Initialize external group plugin.
+ * Initialize external group plugin, if any.
*/
if (def_group_plugin) {
- switch (group_plugin_load(def_group_plugin)) {
- case -1:
- return -1;
- case FALSE:
+ if (group_plugin_load(def_group_plugin) != true)
def_group_plugin = NULL;
- }
}
/*
* Note that if runas_group was specified without runas_user we
* 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) {
set_runasgr(runas_group);
if (runas_user != NULL)
set_runaspw(runas_user ? runas_user : def_runas_default);
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)
set_fqdn(); /* deferred until after sudoers is parsed */
/* Set login class if applicable. */
- set_loginclass(sudo_user.pw);
+ set_loginclass(runas_pw ? runas_pw : sudo_user.pw);
restore_perms();
- return TRUE;
+ debug_return_bool(true);
}
-static void
-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)auth_end_session();
-
- /* 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);
-}
-
-/*
- * 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 auth_begin_session(pwd);
-}
-
-static int
+int
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 *iolog_path = NULL;
+ mode_t cmnd_umask = 0777;
struct sudo_nss *nss;
- int cmnd_status = -1, validated;
- volatile int info_len = 0;
- volatile int rval = TRUE;
+ int cmnd_status = -1, oldlocale, validated;
+ volatile int rval = true;
+ debug_decl(sudoers_policy_main, SUDO_DEBUG_PLUGIN)
- if (sigsetjmp(error_jmp, 1)) {
- /* error recovery via error(), errorx() or log_error() */
+ /* XXX - would like to move this to policy.c but need the cleanup. */
+ if (fatal_setjmp() != 0) {
+ /* error recovery via fatal(), fatalx() or log_fatal() */
rval = -1;
goto done;
}
/* Is root even allowed to run sudo? */
if (user_uid == 0 && !def_root_sudo) {
- warningx("sudoers specifies that root is not allowed to sudo");
+ warningx(_("sudoers specifies that root is not allowed to sudo"));
goto bad;
}
/* Check for -C overriding def_closefrom. */
if (user_closefrom >= 0 && user_closefrom != def_closefrom) {
if (!def_closefrom_override) {
- warningx("you are not permitted to use the -C option");
+ warningx(_("you are not permitted to use the -C option"));
goto bad;
}
def_closefrom = user_closefrom;
NewArgv[0] = user_cmnd;
NewArgv[1] = NULL;
} else {
+ /* Must leave an extra slot before NewArgv for bash's --login */
NewArgc = argc;
- NewArgv = emalloc2(NewArgc + 1, sizeof(char *));
- memcpy(NewArgv, argv, argc * sizeof(char *));
+ NewArgv = emalloc2(NewArgc + 2, sizeof(char *));
+ memcpy(++NewArgv, argv, argc * sizeof(char *));
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);
}
- /* Find command in path */
- cmnd_status = set_cmnd(sudo_mode);
- if (cmnd_status == -1) {
- rval = -1;
- goto done;
- }
+ /* If given the -P option, set the "preserve_groups" flag. */
+ if (ISSET(sudo_mode, MODE_PRESERVE_GROUPS))
+ def_preserve_groups = true;
-#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
+ /* Find command in path */
+ cmnd_status = set_cmnd();
/*
- * 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;
tq_foreach_fwd(snl, nss) {
validated = nss->lookup(nss, validated, pwflag);
if (ISSET(validated, VALIDATE_OK)) {
- /* Handle "= auth" in netsvc.conf */
+ /* Handle [SUCCESS=return] */
if (nss->ret_if_found)
break;
} else {
}
}
+ /* Restore user's locale. */
+ sudoers_setlocale(oldlocale, NULL);
+
if (safe_cmnd == NULL)
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 (runas_pw == NULL)
set_runaspw(user_name);
pw = sudo_getpwuid(atoi(def_timestampowner + 1));
else
pw = sudo_getpwnam(def_timestampowner);
- if (!pw)
- log_error(0, "timestamp owner (%s): No such user",
+ if (pw != NULL) {
+ timestamp_uid = pw->pw_uid;
+ sudo_pw_delref(pw);
+ } else {
+ log_warning(0, N_("timestamp owner (%s): No such user"),
def_timestampowner);
- timestamp_uid = pw->pw_uid;
- pw_delref(pw);
+ timestamp_uid = ROOT_UID;
+ }
}
- /* If given the -P option, set the "preserve_groups" flag. */
- if (ISSET(sudo_mode, MODE_PRESERVE_GROUPS))
- def_preserve_groups = TRUE;
-
/* If no command line args and "shell_noargs" is not set, error out. */
if (ISSET(sudo_mode, MODE_IMPLIED_SHELL) && !def_shell_noargs) {
rval = -2; /* usage error */
}
/* Bail if a tty is required and we don't have one. */
- if (def_requiretty) {
- int fd = open(_PATH_TTY, O_RDWR|O_NOCTTY);
- if (fd == -1) {
- audit_failure(NewArgv, "no tty");
- warningx("sorry, you must have a tty to run sudo");
- goto bad;
- } else
- (void) close(fd);
+ if (def_requiretty && !tty_present()) {
+ audit_failure(NewArgv, N_("no tty"));
+ warningx(_("sorry, you must have a tty to run sudo"));
+ goto bad;
}
/*
*/
if (ISSET(sudo_mode, MODE_EDIT) ||
(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. */
rebuild_env();
/* Require a password if sudoers says so. */
- if (def_authenticate) {
- int rc = check_user(validated, sudo_mode);
- if (rc != TRUE) {
- rval = rc;
- goto done;
- }
+ rval = check_user(validated, sudo_mode);
+ if (rval != true) {
+ if (!ISSET(validated, VALIDATE_OK))
+ log_denial(validated, false);
+ goto done;
}
/* If run as root with SUDO_USER set, set sudo_user.pw to that user. */
if ((pw = sudo_getpwnam(prev_user)) != NULL) {
if (sudo_user.pw != NULL)
- pw_delref(sudo_user.pw);
+ sudo_pw_delref(sudo_user.pw);
sudo_user.pw = pw;
-#ifdef HAVE_MBR_CHECK_MEMBERSHIP
- mbr_uid_to_uuid(user_uid, user_uuid);
-#endif
}
}
}
/* If the user was not allowed to run the command we are done. */
if (!ISSET(validated, VALIDATE_OK)) {
- if (ISSET(validated, FLAG_NO_USER | FLAG_NO_HOST)) {
- 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");
- }
+ log_failure(validated, cmnd_status);
goto bad;
}
/* Finally tell the user if the command did not exist. */
if (cmnd_status == NOT_FOUND_DOT) {
- audit_failure(NewArgv, "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);
+ 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);
goto bad;
} else if (cmnd_status == NOT_FOUND) {
- audit_failure(NewArgv, "%s: command not found", user_cmnd);
- warningx("%s: command not found", user_cmnd);
+ if (ISSET(sudo_mode, MODE_CHECK)) {
+ 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;
}
/* If user specified env vars make sure sudoers allows it. */
if (ISSET(sudo_mode, MODE_RUN) && !def_setenv) {
if (ISSET(sudo_mode, MODE_PRESERVE_ENV)) {
- warningx("sorry, you are not allowed to preserve the environment");
+ warningx(_("sorry, you are not allowed to preserve the environment"));
goto bad;
} else
validate_env_vars(sudo_user.env_vars);
}
- if (ISSET(sudo_mode, (MODE_RUN | MODE_EDIT)) && (def_log_input || def_log_output)) {
- if (def_iolog_file && def_iolog_dir) {
- command_info[info_len++] = expand_iolog_path("iolog_path=",
- def_iolog_dir, def_iolog_file, &sudo_user.iolog_file);
+ if (ISSET(sudo_mode, (MODE_RUN | MODE_EDIT))) {
+ if ((def_log_input || def_log_output) && def_iolog_file && def_iolog_dir) {
+ const char prefix[] = "iolog_path=";
+ iolog_path = expand_iolog_path(prefix, def_iolog_dir,
+ def_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);
* unless umask_override is set.
*/
if (def_umask != 0777) {
- mode_t mask = def_umask;
- if (!def_umask_override) {
- mode_t omask = umask(mask);
- mask |= omask;
- umask(omask);
- }
- easprintf(&command_info[info_len++], "umask=0%o", (unsigned int)mask);
+ cmnd_umask = def_umask;
+ if (!def_umask_override)
+ cmnd_umask |= user_umask;
}
if (ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
*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
+ * in conjunction with the -c option even if the shell name starts
+ * with a '-'. Unfortunately, bash 1.x uses -login, not --login
+ * so this will cause an error for that.
+ */
+ if (NewArgc > 1 && strcmp(NewArgv[0], "-bash") == 0 &&
+ strcmp(NewArgv[1], "-c") == 0) {
+ /* Use the extra slot before NewArgv so we can store --login. */
+ NewArgv--;
+ NewArgc++;
+ NewArgv[0] = NewArgv[1];
+ NewArgv[1] = "--login";
+ }
-#if defined(__linux__) || defined(_AIX)
+#if defined(_AIX) || (defined(__linux__) && !defined(HAVE_PAM))
/* Insert system-wide environment variables. */
- read_env_file(_PATH_ENVIRONMENT, TRUE);
+ read_env_file(_PATH_ENVIRONMENT, true);
#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. */
if (def_env_file)
- read_env_file(def_env_file, FALSE);
+ read_env_file(def_env_file, false);
/* Insert user-specified environment variables. */
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)) {
- char *editor = find_editor(NewArgc - 1, NewArgv + 1, &edit_argv);
- if (editor == NULL)
+ efree(safe_cmnd);
+ safe_cmnd = find_editor(NewArgc - 1, NewArgv + 1, &edit_argv);
+ if (safe_cmnd == NULL)
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 if (runas_ngroups != -1) {
- int i, len;
- size_t glsize;
- char *cp, *gid_list;
-
- glsize = sizeof("runas_groups=") - 1 + (runas_ngroups * (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 < runas_ngroups; i++) {
- /* XXX - check rval */
- len = snprintf(cp, glsize - (cp - gid_list), "%s%u",
- i ? "," : "", (unsigned int) runas_groups[i]);
- cp += len;
- }
- command_info[info_len++] = gid_list;
}
- 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_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. */
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;
- *user_env_out = env_get(); /* our private copy */
+ /* Zero out stashed copy of environment, it is owned by the front-end. */
+ env_init(NULL);
goto done;
bad:
- rval = FALSE;
+ rval = false;
done:
+ fatal_disable_setjmp();
rewind_perms();
/* Close the password and group files and free up memory. */
sudo_endpwent();
sudo_endgrent();
- return 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;
+ debug_return_bool(rval);
}
/*
- * Initialize timezone, set umask, fill in ``sudo_user'' struct and
- * load the ``interfaces'' array.
+ * Initialize timezone and fill in ``sudo_user'' struct.
*/
static void
init_vars(char * const envp[])
{
char * const * ep;
+ debug_decl(init_vars, SUDO_DEBUG_PLUGIN)
-#ifdef HAVE_TZSET
- (void) tzset(); /* set the timezone if applicable */
-#endif /* HAVE_TZSET */
+ sudoers_initlocale(setlocale(LC_ALL, NULL), def_sudoers_locale);
for (ep = envp; *ep; ep++) {
/* XXX - don't fill in if empty string */
}
/*
- * Get a local copy of the user's struct passwd with the shadow password
- * if necessary. It is assumed that euid is 0 at this point so we
- * can read the shadow passwd file if necessary.
+ * Get a local copy of the user's struct passwd if we don't already
+ * have one.
*/
- if ((sudo_user.pw = sudo_getpwnam(user_name)) == NULL) {
- struct passwd pw;
+ 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
+ * YP/NIS/NIS+/LDAP/etc daemon has died.
+ */
+ 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_fatal(). */
+ sudo_user.pw = sudo_mkpwent(user_name, user_uid, user_gid, NULL, NULL);
+ log_fatal(0, N_("unknown uid: %u"), (unsigned int) user_uid);
+ /* NOTREACHED */
+ }
+ }
- /* Create a fake struct passwd for log_error(). */
- memset(&pw, 0, sizeof(pw));
- pw.pw_uid = getuid();
- pw.pw_name = user_name;
- sudo_user.pw = &pw;
+ /*
+ * Get group list.
+ */
+ if (user_group_list == NULL)
+ user_group_list = sudo_get_grlist(sudo_user.pw);
- /*
- * 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
- * YP/NIS/NIS+/LDAP/etc daemon has died.
- */
- if (sudo_mode == MODE_KILL || sudo_mode == MODE_INVALIDATE)
- errorx(1, "unknown user: %s", user_name);
- log_error(0, "unknown user: %s", user_name);
- /* NOTREACHED */
- }
-#ifdef HAVE_MBR_CHECK_MEMBERSHIP
- mbr_uid_to_uuid(user_uid, user_uuid);
-#endif
+ /* Set runas callback. */
+ sudo_defs_table[I_RUNAS_DEFAULT].callback = cb_runas_default;
+
+ /* Set locale callback. */
+ sudo_defs_table[I_SUDOERS_LOCALE].callback = cb_sudoers_locale;
- /* It is now safe to use log_error() and set_perms() */
+ /* 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;
}
/*
* and apply any command-specific defaults entries.
*/
static int
-set_cmnd(int sudo_mode)
+set_cmnd(void)
{
int rval;
char *path = user_path;
+ debug_decl(set_cmnd, SUDO_DEBUG_PLUGIN)
/* Resolve the path and return. */
rval = FOUND;
- user_stat = emalloc(sizeof(struct stat));
+ user_stat = ecalloc(1, sizeof(struct stat));
/* Default value for cmnd, overridden below. */
if (user_cmnd == NULL)
/* set user_args */
if (NewArgc > 1) {
- char *to, **from;
+ char *to, *from, **av;
size_t size, n;
/* Alloc and build up user_args. */
- for (size = 0, from = NewArgv + 1; *from; from++)
- size += strlen(*from) + 1;
+ for (size = 0, av = NewArgv + 1; *av; av++)
+ size += strlen(*av) + 1;
user_args = emalloc(size);
- for (to = user_args, from = NewArgv + 1; *from; from++) {
- n = strlcpy(to, *from, size - (to - user_args));
- if (n >= size - (to - user_args))
- errorx(1, "internal error, set_cmnd() overflow");
- to += n;
- *to++ = ' ';
+ if (ISSET(sudo_mode, MODE_SHELL|MODE_LOGIN_SHELL)) {
+ /*
+ * When running a command via a shell, the sudo front-end
+ * escapes potential meta chars. We unescape non-spaces
+ * for sudoers matching and logging purposes.
+ */
+ for (to = user_args, av = NewArgv + 1; (from = *av); av++) {
+ while (*from) {
+ if (from[0] == '\\' && !isspace((unsigned char)from[1]))
+ from++;
+ *to++ = *from++;
+ }
+ *to++ = ' ';
+ }
+ *--to = '\0';
+ } else {
+ for (to = user_args, av = NewArgv + 1; *av; av++) {
+ n = strlcpy(to, *av, size - (to - user_args));
+ if (n >= size - (to - user_args))
+ fatalx(_("internal error, %s overflow"), "set_cmnd()");
+ to += n;
+ *to++ = ' ';
+ }
+ *--to = '\0';
}
- *--to = '\0';
}
}
- if (strlen(user_cmnd) >= PATH_MAX)
- errorx(1, "%s: file name too long", user_cmnd);
+ if (strlen(user_cmnd) >= PATH_MAX) {
+ errno = ENAMETOOLONG;
+ fatal("%s", user_cmnd);
+ }
if ((user_base = strrchr(user_cmnd, '/')) != NULL)
user_base++;
user_base = user_cmnd;
if (!update_defaults(SETDEF_CMND))
- log_error(NO_STDERR|NO_EXIT, "problem with defaults entries");
-
- if (!runas_user && !runas_group)
- set_runaspw(def_runas_default); /* may have been updated above */
+ log_warning(NO_STDERR, N_("problem with defaults entries"));
- return rval;
+ debug_return_int(rval);
}
/*
* Returns a handle to the sudoers file or NULL on error.
*/
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;
- int rootstat;
-
- /*
- * 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) {
- warningx("fixed mode on %s", sudoers);
- SET(statbuf.st_mode, sudoers_mode);
- if (statbuf.st_gid != sudoers_gid) {
- if (chown(sudoers, (uid_t) -1, sudoers_gid) == 0) {
- warningx("set group on %s", sudoers);
- statbuf.st_gid = sudoers_gid;
- } else
- warning("unable to set group on %s", sudoers);
- }
- } else
- warning("unable to fix mode on %s", sudoers);
- }
+ debug_decl(open_sudoers, SUDO_DEBUG_PLUGIN)
- /*
- * 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, "can't 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)
- 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, "can't 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, "can't read %s", sudoers);
- fclose(fp);
- fp = NULL;
- }
- }
-
- if (fp != NULL) {
- rewind(fp);
- (void) fcntl(fileno(fp), F_SETFD, 1);
+ switch (sudo_secure_file(sudoers, sudoers_uid, sudoers_gid, &sb)) {
+ case SUDO_PATH_SECURE:
+ /*
+ * If we are expecting sudoers to be group readable but
+ * it is not, we must open the file as root, not uid 1.
+ */
+ if (sudoers_uid == ROOT_UID && (sudoers_mode & S_IRGRP)) {
+ if ((sb.st_mode & S_IRGRP) == 0) {
+ restore_perms();
+ set_perms(PERM_ROOT);
+ }
+ }
+ /*
+ * 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;
}
restore_perms(); /* change back to root */
- return fp;
+
+ debug_return_ptr(fp);
}
#ifdef HAVE_LOGIN_CAP_H
static void
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)
- /*
- * Don't make it a fatal error if the user didn't specify the login
- * 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 (!def_use_loginclass)
+ debug_return;
if (login_class && strcmp(login_class, "-") != 0) {
if (user_uid != 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 {
login_class = pw->pw_class;
if (!login_class || !*login_class)
(pw->pw_uid == 0) ? LOGIN_DEFROOTCLASS : LOGIN_DEFCLASS;
}
+ /* Make sure specified login class is valid. */
lc = login_getclass(login_class);
if (!lc || !lc->lc_class || strcmp(lc->lc_class, login_class) != 0) {
- log_error(errflags, "unknown login class: %s", login_class);
- if (!lc)
- lc = login_getclass(NULL); /* needed for login_getstyle() later */
+ /*
+ * Don't make it a fatal error if the user didn't specify the login
+ * 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
static void
}
#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.
+ * Use AI_FQDN if available since "canonical" is not always the same as fqdn.
*/
-void
+static void
set_fqdn(void)
{
-#ifdef HAVE_GETADDRINFO
struct addrinfo *res0, hint;
-#else
- struct hostent *hp;
-#endif
char *p;
+ debug_decl(set_fqdn, SUDO_DEBUG_PLUGIN)
-#ifdef HAVE_GETADDRINFO
zero_bytes(&hint, sizeof(hint));
hint.ai_family = PF_UNSPEC;
- hint.ai_flags = AI_CANONNAME;
+ hint.ai_flags = AI_FQDN;
if (getaddrinfo(user_host, NULL, &hint, &res0) != 0) {
-#else
- if (!(hp = gethostbyname(user_host))) {
-#endif
- log_error(MSG_ONLY|NO_EXIT,
- "unable to resolve host %s", user_host);
+ log_warning(MSG_ONLY, N_("unable to resolve host %s"), user_host);
} else {
if (user_shost != user_host)
efree(user_shost);
efree(user_host);
-#ifdef HAVE_GETADDRINFO
user_host = estrdup(res0->ai_canonname);
freeaddrinfo(res0);
-#else
- user_host = estrdup(hp->h_name);
-#endif
+ if ((p = strchr(user_host, '.')) != NULL)
+ user_shost = estrndup(user_host, (size_t)(p - user_host));
+ else
+ user_shost = user_host;
}
- if ((p = strchr(user_host, '.')) != NULL)
- user_shost = estrndup(user_host, (size_t)(p - user_host));
- else
- user_shost = user_host;
+ debug_return;
}
/*
* and store it in runas_pw. By default, commands run as "root".
*/
static void
-set_runaspw(char *user)
+set_runaspw(const char *user)
{
+ debug_decl(set_runaspw, SUDO_DEBUG_PLUGIN)
+
if (runas_pw != NULL)
- pw_delref(runas_pw);
+ sudo_pw_delref(runas_pw);
if (*user == '#') {
if ((runas_pw = sudo_getpwuid(atoi(user + 1))) == NULL)
runas_pw = sudo_fakepwnam(user, runas_gr ? runas_gr->gr_gid : 0);
} else {
- if ((runas_pw = sudo_getpwnam(user)) == NULL) {
- audit_failure(NewArgv, "unknown user: %s", user);
- log_error(NO_MAIL|MSG_ONLY, "unknown user: %s", user);
- }
+ if ((runas_pw = sudo_getpwnam(user)) == NULL)
+ log_fatal(NO_MAIL|MSG_ONLY, N_("unknown user: %s"), user);
}
+ debug_return;
}
/*
* and store it in runas_gr.
*/
static void
-set_runasgr(char *group)
+set_runasgr(const char *group)
{
+ debug_decl(set_runasgr, SUDO_DEBUG_PLUGIN)
+
if (runas_gr != NULL)
- gr_delref(runas_gr);
+ sudo_gr_delref(runas_gr);
if (*group == '#') {
if ((runas_gr = sudo_getgrgid(atoi(group + 1))) == NULL)
runas_gr = sudo_fakegrnam(group);
} else {
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;
}
/*
- * Cleanup hook for error()/errorx()
+ * Callback for runas_default sudoers setting.
*/
-void
-plugin_cleanup(int gotsignal)
+static int
+cb_runas_default(const char *user)
{
- 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();
- }
+ /* Only reset runaspw if user didn't specify one. */
+ if (!runas_user && !runas_group)
+ set_runaspw(user);
+ return true;
}
+/*
+ * Callback for sudoers_locale sudoers setting.
+ */
static int
-sudoers_policy_version(int verbose)
+cb_sudoers_locale(const char *locale)
{
- if (sigsetjmp(error_jmp, 1)) {
- /* error recovery via error(), errorx() or log_error() */
- 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;
+ sudoers_initlocale(NULL, locale);
+ 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;
- const char *p;
- int flags = 0;
-
-#define MATCHES(s, v) (strncmp(s, v, sizeof(v) - 1) == 0)
-
- /* Parse command line settings. */
- 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;
- }
- }
-
- for (cur = user_info; *cur != NULL; cur++) {
- 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=")) {
- user_gid = (gid_t) atoi(*cur + sizeof("gid=") - 1);
- continue;
- }
- if (MATCHES(*cur, "groups=")) {
- /* Count number of groups */
- const char *val = *cur + sizeof("groups=") - 1;
- const char *cp;
- if (val[0] != '\0') {
- user_ngroups = 1;
- for (cp = val; *cp != '\0'; cp++) {
- if (*cp == ',')
- user_ngroups++;
- }
+ struct sudo_nss *nss;
+ debug_decl(sudoers_cleanup, SUDO_DEBUG_PLUGIN)
- user_groups = emalloc2(user_ngroups, sizeof(GETGROUPS_T));
- user_ngroups = 0;
- cp = val;
- for (;;) {
- /* XXX - strtol would be better here */
- user_groups[user_ngroups++] = atoi(cp);
- cp = strchr(cp, ',');
- if (cp == NULL)
- break;
- cp++; /* skip over comma */
- }
- }
- 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 (snl != NULL) {
+ tq_foreach_fwd(snl, nss)
+ nss->close(nss);
}
- if (user_cwd == NULL)
- user_cwd = "unknown";
- if (user_tty == NULL)
- user_tty = "unknown"; /* user_ttypath remains NULL */
+ if (def_group_plugin)
+ group_plugin_unload();
+ sudo_endpwent();
+ sudo_endgrent();
-#undef MATCHES
- return flags;
+ debug_return;
}
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;
- int ac, i, nargc, wasblank;
+ char *cp, **nargv, *editor, *editor_path = NULL;
+ 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).
* line args so look for those and alloc space for them too.
*/
nargc = 1;
- for (wasblank = FALSE, cp = editor; *cp != '\0'; cp++) {
+ for (wasblank = false, cp = editor; *cp != '\0'; cp++) {
if (isblank((unsigned char) *cp))
- wasblank = TRUE;
+ wasblank = true;
else if (wasblank) {
- wasblank = FALSE;
+ wasblank = false;
nargc++;
}
}
if (cp == NULL ||
find_path(cp, &editor_path, NULL, getenv("PATH"), 0) != FOUND) {
efree(editor);
- return NULL;
+ debug_return_str(NULL);
}
nargv = (char **) emalloc2(nargc + 1 + nfiles + 1, sizeof(char *));
for (ac = 0; cp != NULL && ac < nargc; ac++) {
nargv[ac] = NULL;
*argv_out = nargv;
- return editor_path;
+ debug_return_str(editor_path);
}
/*
static char *
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.
ev0[1] = "VISUAL";
ev0[2] = "EDITOR";
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') {
- editor_path = resolve_editor(editor, nfiles, files, argv_out);
- if (editor_path != NULL)
- break;
+ editor_path = resolve_editor(editor, strlen(editor), nfiles,
+ files, argv_out);
}
}
if (editor_path == NULL) {
- /* def_editor could be a path, split it up */
- editor = estrdup(def_editor);
- cp = strtok(editor, ":");
- while (cp != NULL && editor_path == NULL) {
- editor_path = resolve_editor(cp, nfiles, files, argv_out);
- cp = strtok(NULL, ":");
- }
- if (editor_path)
- efree(editor);
+ /* def_editor could be a path, split it up, avoiding strtok() */
+ cp = editor = def_editor;
+ do {
+ if ((ep = strchr(cp, ':')) != NULL)
+ len = ep - cp;
+ else
+ len = strlen(cp);
+ editor_path = resolve_editor(cp, len, nfiles, files, argv_out);
+ cp = ep + 1;
+ } while (ep != NULL && editor_path == NULL);
}
if (!editor_path) {
- audit_failure(NewArgv, "%s: command not found", editor);
- warningx("%s: command not found", editor);
+ audit_failure(NewArgv, N_("%s: command not found"), editor);
+ warningx(_("%s: command not found"), editor);
}
- return editor_path;
+ debug_return_str(editor_path);
}
#ifdef USE_ADMIN_FLAG
struct stat statbuf;
char flagfile[PATH_MAX];
int fd, n;
+ debug_decl(create_admin_success_flag, SUDO_DEBUG_PLUGIN)
/* Check whether the user is in the admin group. */
if (!user_in_group(sudo_user.pw, "admin"))
- return;
+ debug_return;
/* Build path to flag file. */
n = snprintf(flagfile, sizeof(flagfile), "%s/.sudo_as_admin_successful",
user_dir);
if (n <= 0 || n >= sizeof(flagfile))
- return;
+ debug_return;
/* Create admin flag file if it doesn't already exist. */
set_perms(PERM_USER);
close(fd);
}
restore_perms();
+ debug_return;
}
#else /* !USE_ADMIN_FLAG */
static void
}
#endif /* USE_ADMIN_FLAG */
-struct policy_plugin sudoers_policy = {
- SUDO_POLICY_PLUGIN,
- SUDO_API_VERSION,
- sudoers_policy_open,
- sudoers_policy_close,
- sudoers_policy_version,
- sudoers_policy_check,
- sudoers_policy_list,
- sudoers_policy_validate,
- sudoers_policy_invalidate,
- sudoers_policy_init_session
-};
+static bool
+tty_present(void)
+{
+#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__)
+ return user_ttypath != NULL;
+#else
+ int fd = open(_PATH_TTY, O_RDWR|O_NOCTTY);
+ if (fd != -1)
+ close(fd);
+ return fd != -1;
+#endif
+}
projects / debian / sudo / blobdiff