#define _SUDO_MAIN
#ifdef __TANDEM
# include <floss.h>
#endif
#include "config.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/socket.h>
#ifdef HAVE_SETRLIMIT
# include <sys/time.h>
# include <sys/resource.h>
#endif
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif
#ifdef HAVE_STRING_H
# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
# include <memory.h>
# endif
# include <string.h>
#else
# ifdef HAVE_STRINGS_H
# include <strings.h>
# endif
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_ERR_H
# include <err.h>
#else
# include "emul/err.h"
#endif
#include <pwd.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <grp.h>
#include <time.h>
#include <netinet/in.h>
#include <netdb.h>
#if defined(HAVE_GETPRPWNAM) && defined(HAVE_SET_AUTH_PARAMETERS)
# ifdef __hpux
# undef MAXINT
# include <hpsecurity.h>
# else
# include <sys/security.h>
# endif
# include <prot.h>
#endif
#ifdef HAVE_LOGIN_CAP_H
# include <login_cap.h>
# ifndef LOGIN_DEFROOTCLASS
# define LOGIN_DEFROOTCLASS "daemon"
# endif
#endif
#include <bsm/libbsm.h>
#include <bsm/audit_uevents.h>
#include "sudo.h"
#include "interfaces.h"
#include "version.h"
#ifndef lint
static const char rcsid[] = "$Sudo: sudo.c,v 1.370 2004/08/24 18:01:13 millert Exp $";
#endif
static int init_vars __P((int));
static int parse_args __P((int, char **));
static void check_sudoers __P((void));
static void initial_setup __P((void));
static void set_loginclass __P((struct passwd *));
static void usage __P((int));
static void usage_excl __P((int));
static struct passwd *get_authpw __P((void));
extern int sudo_edit __P((int, char **));
extern void list_matches __P((void));
extern char **rebuild_env __P((char **, int, int));
extern char **zero_env __P((char **));
extern struct passwd *sudo_getpwnam __P((const char *));
extern struct passwd *sudo_getpwuid __P((uid_t));
extern struct passwd *sudo_pwdup __P((const struct passwd *));
void audit_success(struct passwd *pwd);
void audit_fail(struct passwd *pwd, char *errmsg);
int Argc, NewArgc;
char **Argv, **NewArgv;
char *prev_user;
struct sudo_user sudo_user;
struct passwd *auth_pw;
FILE *sudoers_fp;
struct interface *interfaces;
int num_interfaces;
int tgetpass_flags;
uid_t timestamp_uid;
extern int errorlineno;
#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
static struct rlimit corelimit;
#endif
#ifdef HAVE_LOGIN_CAP_H
login_cap_t *lc;
#endif
#ifdef HAVE_BSD_AUTH_H
char *login_style;
#endif
sigaction_t saved_sa_int, saved_sa_quit, saved_sa_tstp, saved_sa_chld;
void (*set_perms) __P((int));
int
main(argc, argv, envp)
int argc;
char **argv;
char **envp;
{
int validated;
int fd;
int cmnd_status;
int sudo_mode;
int pwflag;
char **new_environ;
sigaction_t sa;
extern int printmatches;
extern char **environ;
Argv = argv;
if ((Argc = argc) < 1)
usage(1);
#if defined(HAVE_GETPRPWNAM) && defined(HAVE_SET_AUTH_PARAMETERS)
(void) set_auth_parameters(Argc, Argv);
# ifdef HAVE_INITPRIVS
initprivs();
# endif
#endif
environ = zero_env(envp);
if (geteuid() != 0)
errx(1, "must be setuid root");
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);
sa.sa_handler = reapchild;
(void) sigaction(SIGCHLD, &sa, &saved_sa_chld);
initial_setup();
setpwent();
sudo_mode = parse_args(Argc, Argv);
init_defaults();
load_interfaces();
pwflag = 0;
if (ISSET(sudo_mode, MODE_SHELL))
user_cmnd = "shell";
else if (ISSET(sudo_mode, MODE_EDIT))
user_cmnd = "sudoedit";
else
switch (sudo_mode) {
case MODE_VERSION:
(void) printf("Sudo version %s\n", version);
if (getuid() == 0) {
putchar('\n');
dump_auth_methods();
dump_defaults();
dump_interfaces();
}
exit(0);
break;
case MODE_HELP:
usage(0);
break;
case MODE_VALIDATE:
user_cmnd = "validate";
pwflag = I_VERIFYPW;
break;
case MODE_KILL:
case MODE_INVALIDATE:
user_cmnd = "kill";
pwflag = -1;
break;
case MODE_LISTDEFS:
list_options();
exit(0);
break;
case MODE_LIST:
user_cmnd = "list";
pwflag = I_LISTPW;
printmatches = 1;
break;
}
if (user_cmnd == NULL && NewArgc == 0)
usage(1);
cmnd_status = init_vars(sudo_mode);
#ifdef HAVE_LDAP
validated = sudo_ldap_check(pwflag);
if (def_ignore_local_sudoers);
else if (ISSET(validated, VALIDATE_OK) && !printmatches);
else if (ISSET(validated, VALIDATE_OK) && printmatches)
{
check_sudoers();
sudoers_lookup(pwflag);
}
else
#endif
{
check_sudoers();
validated = sudoers_lookup(pwflag);
}
if (safe_cmnd == NULL)
safe_cmnd = user_cmnd;
#if !defined(HAVE_SETRESUID) && !defined(HAVE_SETREUID) && \
!defined(NO_SAVED_IDS) && defined(_SC_SAVED_IDS) && defined(_SC_VERSION)
if (!def_stay_setuid && set_perms == set_perms_posix) {
if (setuid(0)) {
perror("setuid(0)");
audit_fail(NULL, "setuid failure");
exit(1);
}
set_perms = set_perms_nosuid;
}
#endif
if (def_timestampowner) {
struct passwd *pw;
if (*def_timestampowner == '#')
pw = getpwuid(atoi(def_timestampowner + 1));
else
pw = getpwnam(def_timestampowner);
if (!pw)
log_error(0, "timestamp owner (%s): No such user",
def_timestampowner);
timestamp_uid = pw->pw_uid;
}
if (sudo_mode == MODE_KILL || sudo_mode == MODE_INVALIDATE) {
remove_timestamp((sudo_mode == MODE_KILL));
exit(0);
}
if (ISSET(validated, VALIDATE_ERROR)) {
log_error(0, "parse error in %s near line %d", _PATH_SUDOERS,
errorlineno);
}
if (user_uid == 0 && !def_root_sudo) {
(void) fprintf(stderr,
"Sorry, %s has been configured to not allow root to run it.\n",
getprogname());
exit(1);
}
if (ISSET(sudo_mode, MODE_PRESERVE_GROUPS))
def_preserve_groups = TRUE;
if (ISSET(sudo_mode, MODE_IMPLIED_SHELL) && !def_shell_noargs)
usage(1);
if (ISSET(sudo_mode, MODE_RUN) && (def_always_set_home ||
(ISSET(sudo_mode, MODE_SHELL) && def_set_home)))
SET(sudo_mode, MODE_RESET_HOME);
if (def_requiretty) {
if ((fd = open(_PATH_TTY, O_RDWR|O_NOCTTY)) == -1) {
audit_fail(runas_pw, "no tty");
log_error(NO_MAIL, "sorry, you must have a tty to run sudo");
}
else
(void) close(fd);
}
auth_pw = get_authpw();
if (!ISSET(validated, FLAG_NOPASS))
check_user(ISSET(validated, FLAG_CHECK_USER));
if (user_uid == 0 && prev_user != NULL && strcmp(prev_user, "root") != 0) {
struct passwd *pw;
if ((pw = sudo_getpwnam(prev_user)) != NULL) {
free(sudo_user.pw);
sudo_user.pw = pw;
}
}
if (ISSET(sudo_mode, MODE_RUN))
new_environ = rebuild_env(envp, sudo_mode, ISSET(validated, FLAG_NOEXEC));
else
new_environ = envp;
if (ISSET(validated, VALIDATE_OK)) {
if (cmnd_status == NOT_FOUND_DOT) {
warnx("ignoring `%s' found in '.'\nUse `sudo ./%s' if this is the `%s' you wish to run.", user_cmnd, user_cmnd, user_cmnd);
audit_fail(runas_pw, "command in current dir");
exit(1);
} else if (cmnd_status == NOT_FOUND) {
warnx("%s: command not found", user_cmnd);
audit_fail(runas_pw, "Command not found");
exit(1);
}
log_auth(validated, 1);
if (sudo_mode == MODE_VALIDATE) {
audit_success(runas_pw);
exit(0);
}
else if (sudo_mode == MODE_LIST) {
list_matches();
#ifdef HAVE_LDAP
sudo_ldap_list_matches();
#endif
audit_success(runas_pw);
exit(0);
}
audit_success(runas_pw);
if (def_umask != 0777)
(void) umask(def_umask);
#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
(void) setrlimit(RLIMIT_CORE, &corelimit);
#endif
if (ISSET(sudo_mode, MODE_RUN))
set_perms(PERM_FULL_RUNAS);
endpwent();
endgrent();
environ = new_environ;
if (ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
char *p;
if ((p = strrchr(NewArgv[0], '/')) == NULL)
p = NewArgv[0];
*p = '-';
NewArgv[0] = p;
if (chdir(runas_pw->pw_dir) == -1)
warn("unable to change directory to %s", runas_pw->pw_dir);
}
if (ISSET(sudo_mode, MODE_EDIT))
exit(sudo_edit(NewArgc, NewArgv));
(void) sigaction(SIGINT, &saved_sa_int, NULL);
(void) sigaction(SIGQUIT, &saved_sa_quit, NULL);
(void) sigaction(SIGTSTP, &saved_sa_tstp, NULL);
(void) sigaction(SIGCHLD, &saved_sa_chld, NULL);
#ifndef PROFILING
if (ISSET(sudo_mode, MODE_BACKGROUND) && fork() > 0)
exit(0);
else
EXECV(safe_cmnd, NewArgv);
#else
exit(0);
#endif
warn("unable to execute %s", safe_cmnd);
exit(127);
} else if (ISSET(validated, FLAG_NO_USER) || (validated & FLAG_NO_HOST)) {
log_auth(validated, 1);
audit_fail(runas_pw, "No user or host");
exit(1);
} else if (ISSET(validated, VALIDATE_NOT_OK)) {
if (def_path_info) {
log_auth(validated,
!(cmnd_status == NOT_FOUND_DOT || cmnd_status == NOT_FOUND));
if (cmnd_status == NOT_FOUND)
warnx("%s: command not found", user_cmnd);
else if (cmnd_status == NOT_FOUND_DOT)
warnx("ignoring `%s' found in '.'\nUse `sudo ./%s' if this is the `%s' you wish to run.", user_cmnd, user_cmnd, user_cmnd);
} else {
log_auth(validated, 1);
}
audit_fail(runas_pw, "Validation error");
exit(1);
} else {
log_auth(validated, 1);
audit_fail(runas_pw, "Validation error");
exit(1);
}
exit(0);
}
static int
init_vars(sudo_mode)
int sudo_mode;
{
char *p, thost[MAXHOSTNAMELEN];
int nohostname, rval;
if (user_cmnd == NULL && strlen(NewArgv[0]) >= PATH_MAX) {
audit_fail(NULL, "pathname too long");
errx(1, "%s: File name too long", NewArgv[0]);
}
#ifdef HAVE_TZSET
(void) tzset();
#endif
if (user_cmnd == NULL)
user_cmnd = NewArgv[0];
(void) strlcpy(user_cwd, "unknown", sizeof(user_cwd));
nohostname = gethostname(thost, sizeof(thost));
if (nohostname)
user_host = user_shost = "localhost";
else {
user_host = estrdup(thost);
if (def_fqdn) {
user_shost = user_host;
} else {
if ((p = strchr(user_host, '.'))) {
*p = '\0';
user_shost = estrdup(user_host);
*p = '.';
} else {
user_shost = user_host;
}
}
}
if ((p = ttyname(STDIN_FILENO)) || (p = ttyname(STDOUT_FILENO))) {
if (strncmp(p, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
p += sizeof(_PATH_DEV) - 1;
user_tty = estrdup(p);
} else
user_tty = "unknown";
if ((sudo_user.pw = sudo_getpwuid(getuid())) == NULL) {
struct passwd pw;
char pw_name[MAX_UID_T_LEN + 1];
pw.pw_uid = getuid();
(void) snprintf(pw_name, sizeof(pw_name), "%lu",
(unsigned long) pw.pw_uid);
pw.pw_name = pw_name;
sudo_user.pw = &pw;
if (sudo_mode & (MODE_INVALIDATE|MODE_KILL))
errx(1, "uid %s does not exist in the passwd file!", pw_name);
log_error(0, "uid %s does not exist in the passwd file!", pw_name);
}
if (user_shell == NULL || *user_shell == '\0')
user_shell = sudo_user.pw->pw_shell;
if (def_fqdn)
set_fqdn();
if (nohostname)
log_error(USE_ERRNO|MSG_ONLY, "can't get hostname");
set_runaspw(*user_runas);
if (*user_runas[0] == '#' && runas_pw->pw_name && runas_pw->pw_name[0])
*user_runas = estrdup(runas_pw->pw_name);
set_perms(PERM_USER);
if (!getcwd(user_cwd, sizeof(user_cwd))) {
set_perms(PERM_ROOT);
if (!getcwd(user_cwd, sizeof(user_cwd))) {
warnx("cannot get working directory");
(void) strlcpy(user_cwd, "unknown", sizeof(user_cwd));
}
} else
set_perms(PERM_ROOT);
if ((sudo_mode & (MODE_SHELL | MODE_EDIT))) {
char **dst, **src = NewArgv;
NewArgv = (char **) emalloc2((++NewArgc + 1), sizeof(char *));
if (ISSET(sudo_mode, MODE_EDIT))
NewArgv[0] = "sudoedit";
else if (ISSET(sudo_mode, MODE_LOGIN_SHELL))
NewArgv[0] = runas_pw->pw_shell;
else if (user_shell && *user_shell)
NewArgv[0] = user_shell;
else {
audit_fail(NULL, "unable to determine shell");
errx(1, "unable to determine shell");
}
for (dst = NewArgv + 1; (*dst = *src) != NULL; ++src, ++dst)
;
}
set_loginclass(sudo_user.pw);
rval = FOUND;
user_stat = emalloc(sizeof(struct stat));
if (sudo_mode & (MODE_RUN | MODE_EDIT)) {
if (ISSET(sudo_mode, MODE_RUN)) {
set_perms(PERM_RUNAS);
rval = find_path(NewArgv[0], &user_cmnd, user_stat, user_path);
set_perms(PERM_ROOT);
if (rval != FOUND) {
set_perms(PERM_USER);
rval = find_path(NewArgv[0], &user_cmnd, user_stat, user_path);
set_perms(PERM_ROOT);
}
}
if (NewArgc > 1) {
char *to, **from;
size_t size, n;
if (!(sudo_mode & (MODE_SHELL | MODE_EDIT))) {
size = (size_t) (NewArgv[NewArgc-1] - NewArgv[1]) +
strlen(NewArgv[NewArgc-1]) + 1;
} else {
for (size = 0, from = NewArgv + 1; *from; from++)
size += strlen(*from) + 1;
}
user_args = (char *) 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))
errx(1, "internal error, init_vars() overflow");
to += n;
*to++ = ' ';
}
*--to = '\0';
}
}
if ((user_base = strrchr(user_cmnd, '/')) != NULL)
user_base++;
else
user_base = user_cmnd;
return(rval);
}
static int
parse_args(argc, argv)
int argc;
char **argv;
{
int rval = MODE_RUN;
int excl = 0;
NewArgv = argv + 1;
NewArgc = argc - 1;
if (strcmp(getprogname(), "sudoedit") == 0) {
rval = MODE_EDIT;
excl = 'e';
} else
rval = MODE_RUN;
if (NewArgc == 0 && rval == MODE_RUN) {
SET(rval, (MODE_IMPLIED_SHELL | MODE_SHELL));
return(rval);
}
while (NewArgc > 0 && NewArgv[0][0] == '-') {
if (NewArgv[0][1] != '\0' && NewArgv[0][2] != '\0')
warnx("please use single character options");
switch (NewArgv[0][1]) {
case 'p':
if (NewArgv[1] == NULL)
usage(1);
user_prompt = NewArgv[1];
NewArgc--;
NewArgv++;
break;
case 'u':
if (NewArgv[1] == NULL)
usage(1);
user_runas = &NewArgv[1];
NewArgc--;
NewArgv++;
break;
#ifdef HAVE_BSD_AUTH_H
case 'a':
if (NewArgv[1] == NULL)
usage(1);
login_style = NewArgv[1];
NewArgc--;
NewArgv++;
break;
#endif
#ifdef HAVE_LOGIN_CAP_H
case 'c':
if (NewArgv[1] == NULL)
usage(1);
login_class = NewArgv[1];
def_use_loginclass = TRUE;
NewArgc--;
NewArgv++;
break;
#endif
case 'b':
SET(rval, MODE_BACKGROUND);
break;
case 'e':
rval = MODE_EDIT;
if (excl && excl != 'e')
usage_excl(1);
excl = 'e';
break;
case 'v':
rval = MODE_VALIDATE;
if (excl && excl != 'v')
usage_excl(1);
excl = 'v';
break;
case 'i':
SET(rval, (MODE_LOGIN_SHELL | MODE_SHELL));
def_env_reset = TRUE;
if (excl && excl != 'i')
usage_excl(1);
excl = 'i';
break;
case 'k':
rval = MODE_INVALIDATE;
if (excl && excl != 'k')
usage_excl(1);
excl = 'k';
break;
case 'K':
rval = MODE_KILL;
if (excl && excl != 'K')
usage_excl(1);
excl = 'K';
break;
case 'L':
rval = MODE_LISTDEFS;
if (excl && excl != 'L')
usage_excl(1);
excl = 'L';
break;
case 'l':
rval = MODE_LIST;
if (excl && excl != 'l')
usage_excl(1);
excl = 'l';
break;
case 'V':
rval = MODE_VERSION;
if (excl && excl != 'V')
usage_excl(1);
excl = 'V';
break;
case 'h':
rval = MODE_HELP;
if (excl && excl != 'h')
usage_excl(1);
excl = 'h';
break;
case 's':
SET(rval, MODE_SHELL);
if (excl && excl != 's')
usage_excl(1);
excl = 's';
break;
case 'H':
SET(rval, MODE_RESET_HOME);
break;
case 'P':
SET(rval, MODE_PRESERVE_GROUPS);
break;
case 'S':
SET(tgetpass_flags, TGP_STDIN);
break;
case '-':
NewArgc--;
NewArgv++;
if (rval == MODE_RUN)
SET(rval, (MODE_IMPLIED_SHELL | MODE_SHELL));
return(rval);
case '\0':
warnx("'-' requires an argument");
usage(1);
default:
warnx("illegal option `%s'", NewArgv[0]);
usage(1);
}
NewArgc--;
NewArgv++;
}
if (user_runas != NULL && !ISSET(rval, (MODE_EDIT|MODE_RUN))) {
if (excl != '\0')
warnx("the `-u' and '-%c' options may not be used together", excl);
usage(1);
}
if ((NewArgc == 0 && (rval & MODE_EDIT)) ||
(NewArgc > 0 && !(rval & (MODE_RUN | MODE_EDIT))))
usage(1);
return(rval);
}
static void
check_sudoers()
{
struct stat statbuf;
int rootstat, i;
char c;
if ((rootstat = stat_sudoers(_PATH_SUDOERS, &statbuf)) == 0 &&
SUDOERS_UID == statbuf.st_uid && SUDOERS_MODE != 0400 &&
(statbuf.st_mode & 0007777) == 0400) {
if (chmod(_PATH_SUDOERS, SUDOERS_MODE) == 0) {
warnx("fixed mode on %s", _PATH_SUDOERS);
SET(statbuf.st_mode, SUDOERS_MODE);
if (statbuf.st_gid != SUDOERS_GID) {
if (!chown(_PATH_SUDOERS,(uid_t) -1,SUDOERS_GID)) {
warnx("set group on %s", _PATH_SUDOERS);
statbuf.st_gid = SUDOERS_GID;
} else
warn("unable to set group on %s", _PATH_SUDOERS);
}
} else
warn("unable to fix mode on %s", _PATH_SUDOERS);
}
set_perms(PERM_SUDOERS);
if (rootstat != 0 && stat_sudoers(_PATH_SUDOERS, &statbuf) != 0)
log_error(USE_ERRNO, "can't stat %s", _PATH_SUDOERS);
else if (!S_ISREG(statbuf.st_mode))
log_error(0, "%s is not a regular file", _PATH_SUDOERS);
else if (statbuf.st_size == 0)
log_error(0, "%s is zero length", _PATH_SUDOERS);
else if ((statbuf.st_mode & 07777) != SUDOERS_MODE)
log_error(0, "%s is mode 0%o, should be 0%o", _PATH_SUDOERS,
(statbuf.st_mode & 07777), SUDOERS_MODE);
else if (statbuf.st_uid != SUDOERS_UID)
log_error(0, "%s is owned by uid %lu, should be %lu", _PATH_SUDOERS,
(unsigned long) statbuf.st_uid, (unsigned long) SUDOERS_UID);
else if (statbuf.st_gid != SUDOERS_GID)
log_error(0, "%s is owned by gid %lu, should be %lu", _PATH_SUDOERS,
(unsigned long) statbuf.st_gid, (unsigned long) SUDOERS_GID);
else {
for (i = 0; i < 10 ; i++) {
errno = 0;
if ((sudoers_fp = fopen(_PATH_SUDOERS, "r")) == NULL ||
fread(&c, sizeof(c), 1, sudoers_fp) != 1) {
sudoers_fp = NULL;
if (errno != EAGAIN && errno != EWOULDBLOCK)
break;
} else
break;
sleep(1);
}
if (sudoers_fp == NULL)
log_error(USE_ERRNO, "can't open %s", _PATH_SUDOERS);
}
set_perms(PERM_ROOT);
}
static void
initial_setup()
{
#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
struct rlimit rl;
(void) getrlimit(RLIMIT_CORE, &corelimit);
memcpy(&rl, &corelimit, sizeof(struct rlimit));
rl.rlim_cur = 0;
(void) setrlimit(RLIMIT_CORE, &rl);
#endif
closefrom(STDERR_FILENO + 1);
#if defined(HAVE_SETRESUID) || defined(HAVE_SETREUID)
set_perms = set_perms_suid;
#else
# if !defined(NO_SAVED_IDS) && defined(_SC_SAVED_IDS) && defined(_SC_VERSION)
if (sysconf(_SC_SAVED_IDS) == 1 && sysconf(_SC_VERSION) >= 199009)
set_perms = set_perms_posix;
else
# endif
set_perms = set_perms_nosuid;
#endif
}
#ifdef HAVE_LOGIN_CAP_H
static void
set_loginclass(pw)
struct passwd *pw;
{
int errflags;
if (login_class)
errflags = NO_MAIL|MSG_ONLY;
else
errflags = NO_MAIL|MSG_ONLY|NO_EXIT;
if (login_class && strcmp(login_class, "-") != 0) {
if (strcmp(*user_runas, "root") != 0 && user_uid != 0)
errx(1, "only root can use -c %s", login_class);
} else {
login_class = pw->pw_class;
if (!login_class || !*login_class)
login_class =
(pw->pw_uid == 0) ? LOGIN_DEFROOTCLASS : LOGIN_DEFCLASS;
}
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);
}
}
#else
static void
set_loginclass(pw)
struct passwd *pw;
{
}
#endif
void
set_fqdn()
{
struct hostent *hp;
char *p;
if (!(hp = gethostbyname(user_host))) {
log_error(MSG_ONLY|NO_EXIT,
"unable to lookup %s via gethostbyname()", user_host);
} else {
if (user_shost != user_host)
free(user_shost);
free(user_host);
user_host = estrdup(hp->h_name);
}
if ((p = strchr(user_host, '.'))) {
*p = '\0';
user_shost = estrdup(user_host);
*p = '.';
} else {
user_shost = user_host;
}
}
int
set_runaspw(user)
char *user;
{
if (runas_pw != NULL) {
if (user_runas != &def_runas_default)
return(TRUE);
free(runas_pw);
}
if (*user == '#') {
runas_pw = sudo_getpwuid(atoi(user + 1));
if (runas_pw == NULL) {
runas_pw = emalloc(sizeof(struct passwd));
(void) memset((VOID *)runas_pw, 0, sizeof(struct passwd));
runas_pw->pw_uid = atoi(user + 1);
}
} else {
runas_pw = sudo_getpwnam(user);
if (runas_pw == NULL) {
audit_fail(NULL, "no passwd entry for user");
log_error(NO_MAIL|MSG_ONLY, "no passwd entry for %s!", user);
}
}
return(TRUE);
}
static struct passwd *
get_authpw()
{
struct passwd *pw;
if (def_rootpw) {
if (runas_pw->pw_uid == 0)
pw = runas_pw;
else if ((pw = sudo_getpwuid(0)) == NULL) {
audit_fail(NULL, "user does not exist in passwd file");
log_error(0, "uid 0 does not exist in the passwd file!");
}
} else if (def_runaspw) {
if (strcmp(def_runas_default, *user_runas) == 0)
pw = runas_pw;
else if ((pw = sudo_getpwnam(def_runas_default)) == NULL) {
audit_fail(NULL, "user does not exist in passwd file");
log_error(0, "user %s does not exist in the passwd file!",
def_runas_default);
}
} else if (def_targetpw) {
if (runas_pw->pw_name == NULL) {
audit_fail(NULL, "uid does not exist in passwd file");
log_error(NO_MAIL|MSG_ONLY, "no passwd entry for %lu!",
(unsigned long) runas_pw->pw_uid);
}
pw = runas_pw;
} else
pw = sudo_user.pw;
return(pw);
}
static void
usage_excl(exit_val)
int exit_val;
{
warnx("Only one of the -e, -h, -k, -K, -l, -s, -v or -V options may be used");
usage(exit_val);
}
static void
usage(exit_val)
int exit_val;
{
char **p;
int linelen, linemax, ulen;
static char *uvec[] = {
" [-HPSb]",
#ifdef HAVE_BSD_AUTH_H
" [-a auth_type]",
#endif
#ifdef HAVE_LOGIN_CAP_H
" [-c class|-]",
#endif
" [-p prompt]",
" [-u username|#uid]",
" { -e file [...] | -i | -s | <command> }",
NULL
};
if (strcmp(getprogname(), "sudoedit") == 0) {
for (p = uvec; p[1] != NULL; p++)
continue;
*p = " file [...]";
} else {
fprintf(stderr, "usage: %s -K | -L | -V | -h | -k | -l | -v\n",
getprogname());
}
ulen = (int)strlen(getprogname()) + 7;
linemax = 80;
linelen = linemax - ulen;
printf("usage: %s", getprogname());
for (p = uvec; *p != NULL; p++) {
if (linelen == linemax || (linelen -= strlen(*p)) >= 0) {
fputs(*p, stdout);
} else {
p--;
linelen = linemax;
printf("\n%*s", ulen, "");
}
}
putchar('\n');
exit(exit_val);
}
void audit_success(struct passwd *pwd)
{
int aufd;
token_t *tok;
auditinfo_t auinfo;
long au_cond;
uid_t uid = pwd->pw_uid;
gid_t gid = pwd->pw_gid;
pid_t pid = getpid();
if (auditon(A_GETCOND, &au_cond, sizeof(long)) < 0) {
fprintf(stderr, "sudo: Could not determine audit condition\n");
exit(1);
}
if (au_cond == AUC_NOAUDIT)
return;
if(getaudit(&auinfo) != 0) {
fprintf(stderr, "sudo: getaudit failed: %s\n", strerror(errno));
exit(1);
}
if((aufd = au_open()) == -1) {
fprintf(stderr, "sudo: Audit Error: au_open() failed\n");
exit(1);
}
if((tok = au_to_subject32(auinfo.ai_auid, geteuid(), getegid(),
uid, gid, pid, auinfo.ai_asid, &auinfo.ai_termid)) == NULL) {
fprintf(stderr, "sudo: Audit Error: au_to_subject32() failed\n");
exit(1);
}
au_write(aufd, tok);
if((tok = au_to_return32(0, 0)) == NULL) {
fprintf(stderr, "sudo: Audit Error: au_to_return32() failed\n");
exit(1);
}
au_write(aufd, tok);
if(au_close(aufd, 1, AUE_sudo) == -1) {
fprintf(stderr, "sudo: Audit Error: au_close() failed\n");
exit(1);
}
return;
}
void audit_fail(struct passwd *pwd, char *errmsg)
{
int aufd;
token_t *tok;
auditinfo_t auinfo;
long au_cond;
uid_t uid = pwd ? pwd->pw_uid : -1;
gid_t gid = pwd ? pwd->pw_gid : -1;
pid_t pid = getpid();
if (auditon(A_GETCOND, &au_cond, sizeof(long)) < 0) {
fprintf(stderr, "sudo: Could not determine audit condition\n");
exit(1);
}
if (au_cond == AUC_NOAUDIT)
return;
if(getaudit(&auinfo) != 0) {
fprintf(stderr, "sudo: getaudit failed: %s\n", strerror(errno));
exit(1);
}
if((aufd = au_open()) == -1) {
fprintf(stderr, "sudo: Audit Error: au_open() failed\n");
exit(1);
}
if((tok = au_to_subject32(auinfo.ai_auid, geteuid(), getegid(),
uid, gid, pid, auinfo.ai_asid, &auinfo.ai_termid)) == NULL) {
fprintf(stderr, "sudo: Audit Error: au_to_subject32() failed\n");
exit(1);
}
au_write(aufd, tok);
if((tok = au_to_text(errmsg)) == NULL) {
fprintf(stderr, "sudo: Audit Error: au_to_text() failed\n");
exit(1);
}
au_write(aufd, tok);
if((tok = au_to_return32(1, errno)) == NULL) {
fprintf(stderr, "sudo: Audit Error: au_to_return32() failed\n");
exit(1);
}
au_write(aufd, tok);
if(au_close(aufd, 1, AUE_sudo) == -1) {
fprintf(stderr, "sudo: Audit Error: au_close() failed\n");
exit(1);
}
return;
}