#define _SUDO_SUDO_C
#include "config.h"
#include <stdio.h>
#ifdef STDC_HEADERS
#include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <pwd.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <grp.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <netdb.h>
#ifdef HAVE_SETRLIMIT
#include <sys/time.h>
#include <sys/resource.h>
#endif
#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_LOGINCAP
# include <login_cap.h>
# ifndef LOGIN_DEFROOTCLASS
# define LOGIN_DEFROOTCLASS "daemon"
# endif
#endif
#include "sudo.h"
#include "interfaces.h"
#include "version.h"
#ifndef STDC_HEADERS
extern char *getenv __P((char *));
#endif
#ifndef lint
static const char rcsid[] = "$Sudo: sudo.c,v 1.278 2000/03/24 20:13:12 millert Exp $";
#endif
struct env_table {
char *name;
int len;
};
static int parse_args __P((void));
static void usage __P((int));
static void usage_excl __P((int));
static void check_sudoers __P((void));
static int init_vars __P((int));
static int set_loginclass __P((struct passwd *));
static void add_env __P((int));
static void clean_env __P((char **, struct env_table *));
static void initial_setup __P((void));
static struct passwd *get_authpw __P((void));
extern struct passwd *sudo_getpwuid __P((uid_t));
extern struct passwd *sudo_getpwnam __P((const char *));
extern void list_matches __P((void));
int Argc;
char **Argv;
int NewArgc = 0;
char **NewArgv = NULL;
struct sudo_user sudo_user;
struct passwd *auth_pw;
FILE *sudoers_fp = NULL;
struct interface *interfaces;
int num_interfaces;
int tgetpass_flags;
extern int errorlineno;
static char *runas_homedir = NULL;
#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
static struct rlimit corelimit;
#endif
static struct env_table badenv_table[] = {
{ "IFS=", 4 },
{ "LOCALDOMAIN=", 12 },
{ "RES_OPTIONS=", 12 },
{ "HOSTALIASES=", 12 },
{ "LD_", 3 },
{ "_RLD", 4 },
#ifdef __hpux
{ "SHLIB_PATH=", 11 },
#endif
#ifdef _AIX
{ "LIBPATH=", 8 },
#endif
#ifdef HAVE_KERB4
{ "KRB_CONF", 8 },
#endif
#ifdef HAVE_KERB5
{ "KRB5_CONFIG", 11 },
#endif
{ "ENV=", 4 },
{ "BASH_ENV=", 9 },
{ (char *) NULL, 0 }
};
int
main(argc, argv)
int argc;
char **argv;
{
int validated;
int fd;
int cmnd_status;
int sudo_mode;
#ifdef POSIX_SIGNALS
sigset_t set, oset;
#else
int omask;
#endif
extern char **environ;
extern int printmatches;
#if defined(HAVE_GETPRPWNAM) && defined(HAVE_SET_AUTH_PARAMETERS)
(void) set_auth_parameters(argc, argv);
# ifdef HAVE_INITPRIVS
initprivs();
# endif
#endif
Argv = argv;
Argc = argc;
if (geteuid() != 0) {
(void) fprintf(stderr, "Sorry, %s must be setuid root.\n", Argv[0]);
exit(1);
}
#ifdef POSIX_SIGNALS
(void) sigemptyset(&set);
(void) sigaddset(&set, SIGINT);
(void) sigaddset(&set, SIGQUIT);
(void) sigaddset(&set, SIGTSTP);
(void) sigprocmask(SIG_BLOCK, &set, &oset);
#else
omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGTSTP));
#endif
initial_setup();
user_prompt = getenv("SUDO_PROMPT");
sudo_mode = parse_args();
init_defaults();
if (sudo_mode & MODE_SHELL)
user_cmnd = "shell";
else
switch (sudo_mode) {
case MODE_VERSION:
(void) printf("Sudo version %s\n", version);
if (getuid() == 0) {
putchar('\n');
dump_auth_methods();
dump_defaults();
}
exit(0);
break;
case MODE_HELP:
usage(0);
break;
case MODE_VALIDATE:
user_cmnd = "validate";
break;
case MODE_KILL:
case MODE_INVALIDATE:
user_cmnd = "kill";
break;
case MODE_LISTDEFS:
list_options();
exit(0);
break;
case MODE_LIST:
user_cmnd = "list";
printmatches = 1;
break;
}
if (user_cmnd == NULL && NewArgc == 0)
usage(1);
clean_env(environ, badenv_table);
cmnd_status = init_vars(sudo_mode);
check_sudoers();
add_env(!(sudo_mode & MODE_SHELL));
validated = sudoers_lookup(sudo_mode);
if (sudo_mode == MODE_KILL || sudo_mode == MODE_INVALIDATE) {
remove_timestamp((sudo_mode == MODE_KILL));
exit(0);
}
if (validated & VALIDATE_ERROR)
log_error(0, "parse error in %s near line %d", _PATH_SUDOERS,
errorlineno);
if (user_uid == 0 && !def_flag(I_ROOT_SUDO)) {
(void) fputs("You are already root, you don't need to use sudo.\n",
stderr);
exit(1);
}
if ((sudo_mode & MODE_IMPLIED_SHELL) && !def_flag(I_SHELL_NOARGS))
usage(1);
if ((sudo_mode & MODE_SHELL) && def_flag(I_SET_HOME))
sudo_mode |= MODE_RESET_HOME;
if (def_flag(I_REQUIRETTY)) {
if ((fd = open(_PATH_TTY, O_RDWR|O_NOCTTY)) == -1)
log_error(NO_MAIL, "sorry, you must have a tty to run sudo");
else
(void) close(fd);
}
auth_pw = get_authpw();
if (!(validated & FLAG_NOPASS))
check_user();
if (validated & VALIDATE_OK) {
if (cmnd_status == NOT_FOUND_DOT) {
(void) fprintf(stderr, "%s: ignoring `%s' found in '.'\nUse `sudo ./%s' if this is the `%s' you wish to run.\n", Argv[0], user_cmnd, user_cmnd, user_cmnd);
exit(1);
} else if (cmnd_status == NOT_FOUND) {
(void) fprintf(stderr, "%s: %s: command not found\n", Argv[0],
user_cmnd);
exit(1);
}
log_auth(validated, 1);
if (sudo_mode == MODE_VALIDATE)
exit(0);
else if (sudo_mode == MODE_LIST) {
list_matches();
exit(0);
}
if (safe_cmnd == NULL) {
log_error(MSG_ONLY,
"internal error, cmnd_safe never got set for %s; %s",
user_cmnd,
"please report this error at http://courtesan.com/sudo/bugs/");
}
if (def_ival(I_LOGFACSTR))
closelog();
#ifdef POSIX_SIGNALS
(void) sigprocmask(SIG_SETMASK, &oset, NULL);
#else
(void) sigsetmask(omask);
#endif
if (def_ival(I_UMASK) != 0777)
(void) umask(def_mode(I_UMASK));
if (def_str(I_SECURE_PATH) && !user_is_exempt())
if (sudo_setenv("PATH", def_str(I_SECURE_PATH))) {
(void) fprintf(stderr, "%s: cannot allocate memory!\n",
Argv[0]);
exit(1);
}
#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
(void) setrlimit(RLIMIT_CORE, &corelimit);
#endif
set_perms(PERM_RUNAS, sudo_mode);
if ((sudo_mode & MODE_RESET_HOME) && runas_homedir)
(void) sudo_setenv("HOME", runas_homedir);
#ifndef PROFILING
if ((sudo_mode & MODE_BACKGROUND) && fork() > 0)
exit(0);
else
EXEC(safe_cmnd, NewArgv);
#else
exit(0);
#endif
(void) fprintf(stderr, "%s: unable to exec %s: %s\n",
Argv[0], safe_cmnd, strerror(errno));
exit(-1);
} else if ((validated & FLAG_NO_USER) || (validated & FLAG_NO_HOST)) {
log_auth(validated, 1);
exit(1);
} else if (validated & VALIDATE_NOT_OK) {
if (def_flag(I_PATH_INFO)) {
log_auth(validated,
!(cmnd_status == NOT_FOUND_DOT || cmnd_status == NOT_FOUND));
if (cmnd_status == NOT_FOUND)
(void) fprintf(stderr, "%s: %s: command not found\n", Argv[0],
user_cmnd);
else if (cmnd_status == NOT_FOUND_DOT)
(void) fprintf(stderr, "%s: ignoring `%s' found in '.'\nUse `sudo ./%s' if this is the `%s' you wish to run.\n", Argv[0], user_cmnd, user_cmnd, user_cmnd);
} else {
log_auth(validated, 1);
}
exit(1);
} else {
log_auth(validated, 1);
exit(1);
}
exit(0);
}
static int
init_vars(sudo_mode)
int sudo_mode;
{
char *p, thost[MAXHOSTNAMELEN];
if (user_cmnd == NULL && strlen(NewArgv[0]) >= MAXPATHLEN) {
(void) fprintf(stderr, "%s: %s: Pathname too long\n", Argv[0],
NewArgv[0]);
exit(1);
}
#ifdef HAVE_TZSET
(void) tzset();
#endif
if (user_cmnd == NULL)
user_cmnd = NewArgv[0];
(void) strcpy(user_cwd, "unknown");
if ((gethostname(thost, sizeof(thost)))) {
user_host = "localhost";
log_error(USE_ERRNO|MSG_ONLY, "can't get hostname");
} else
user_host = estrdup(thost);
if (def_flag(I_FQDN))
set_fqdn();
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) sprintf(pw_name, "%ld", (long) pw.pw_uid);
pw.pw_name = pw_name;
sudo_user.pw = &pw;
log_error(0, "uid %ld does not exist in the passwd file!",
(long) pw.pw_uid);
}
set_perms(PERM_USER, sudo_mode);
if (!getcwd(user_cwd, sizeof(user_cwd))) {
set_perms(PERM_ROOT, sudo_mode);
if (!getcwd(user_cwd, sizeof(user_cwd))) {
(void) fprintf(stderr, "%s: Can't get working directory!\n",
Argv[0]);
(void) strcpy(user_cwd, "unknown");
}
} else
set_perms(PERM_ROOT, sudo_mode);
load_interfaces();
if ((sudo_mode & MODE_SHELL)) {
char **dst, **src = NewArgv;
NewArgv = (char **) emalloc (sizeof(char *) * (++NewArgc + 1));
if (user_shell && *user_shell) {
NewArgv[0] = user_shell;
} else {
(void) fprintf(stderr, "%s: Unable to determine shell.", Argv[0]);
exit(1);
}
for (dst = NewArgv + 1; (*dst = *src) != NULL; ++src, ++dst)
;
}
if ((sudo_mode & MODE_RUN))
return(find_path(NewArgv[0], &user_cmnd));
else
return(FOUND);
}
static int
parse_args()
{
int rval = MODE_RUN;
int excl = 0;
NewArgv = Argv + 1;
NewArgc = Argc - 1;
if (NewArgc == 0) {
rval |= (MODE_IMPLIED_SHELL | MODE_SHELL);
return(rval);
}
while (NewArgc > 0 && NewArgv[0][0] == '-') {
if (NewArgv[0][1] != '\0' && NewArgv[0][2] != '\0') {
(void) fprintf(stderr, "%s: Please use single character options\n",
Argv[0]);
usage(1);
}
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_LOGINCAP
case 'c':
if (NewArgv[1] == NULL)
usage(1);
login_class = NewArgv[1];
def_flag(I_LOGINCLASS) = TRUE;
NewArgc--;
NewArgv++;
break;
#endif
case 'b':
rval |= MODE_BACKGROUND;
break;
case 'v':
rval = MODE_VALIDATE;
if (excl && excl != 'v')
usage_excl(1);
excl = 'v';
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':
rval |= MODE_SHELL;
if (excl && excl != 's')
usage_excl(1);
excl = 's';
break;
case 'H':
rval |= MODE_RESET_HOME;
break;
case 'S':
tgetpass_flags |= TGP_STDIN;
break;
case '-':
NewArgc--;
NewArgv++;
if (rval == MODE_RUN)
rval |= (MODE_IMPLIED_SHELL | MODE_SHELL);
return(rval);
case '\0':
(void) fprintf(stderr, "%s: '-' requires an argument\n",
Argv[0]);
usage(1);
default:
(void) fprintf(stderr, "%s: Illegal option %s\n", Argv[0],
NewArgv[0]);
usage(1);
}
NewArgc--;
NewArgv++;
}
if (NewArgc > 0 && !(rval & MODE_RUN))
usage(1);
return(rval);
}
static void
add_env(contiguous)
int contiguous;
{
char idstr[MAX_UID_T_LEN + 1];
size_t size;
char *buf;
size = strlen(user_cmnd) + 1;
if (NewArgc > 1) {
char *to, **from;
if (contiguous) {
size += (size_t) (NewArgv[NewArgc-1] - NewArgv[1]) +
strlen(NewArgv[NewArgc-1]) + 1;
} else {
for (from = &NewArgv[1]; *from; from++)
size += strlen(*from) + 1;
}
buf = (char *) emalloc(size);
(void) strcpy(buf, user_cmnd);
to = buf + strlen(user_cmnd);
for (from = &NewArgv[1]; *from; from++) {
*to++ = ' ';
(void) strcpy(to, *from);
to += strlen(*from);
}
} else {
buf = user_cmnd;
}
if (sudo_setenv("SUDO_COMMAND", buf)) {
(void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
exit(1);
}
if (NewArgc > 1)
free(buf);
if (NewArgc > 1 && (user_args = getenv("SUDO_COMMAND"))) {
if ((user_args = strchr(user_args, ' ')))
user_args++;
else
user_args = NULL;
}
if (sudo_setenv("SUDO_USER", user_name)) {
(void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
exit(1);
}
(void) sprintf(idstr, "%ld", (long) user_uid);
if (sudo_setenv("SUDO_UID", idstr)) {
(void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
exit(1);
}
(void) sprintf(idstr, "%ld", (long) user_gid);
if (sudo_setenv("SUDO_GID", idstr)) {
(void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
exit(1);
}
if ((buf = getenv("SUDO_PS1")))
if (sudo_setenv("PS1", buf)) {
(void) fprintf(stderr, "%s: cannot allocate memory!\n", Argv[0]);
exit(1);
}
}
static void
check_sudoers()
{
struct stat statbuf;
int rootstat, i;
char c;
if ((rootstat = lstat(_PATH_SUDOERS, &statbuf)) == 0 &&
SUDOERS_UID == statbuf.st_uid && SUDOERS_MODE != 0400 &&
(statbuf.st_mode & 0007777) == 0400) {
if (chmod(_PATH_SUDOERS, SUDOERS_MODE) == 0) {
(void) fprintf(stderr, "%s: fixed mode on %s\n",
Argv[0], _PATH_SUDOERS);
statbuf.st_mode |= SUDOERS_MODE;
if (statbuf.st_gid != SUDOERS_GID) {
if (!chown(_PATH_SUDOERS,(uid_t) -1,SUDOERS_GID)) {
(void) fprintf(stderr, "%s: set group on %s\n",
Argv[0], _PATH_SUDOERS);
statbuf.st_gid = SUDOERS_GID;
} else {
(void) fprintf(stderr,"%s: Unable to set group on %s: %s\n",
Argv[0], _PATH_SUDOERS, strerror(errno));
}
}
} else {
(void) fprintf(stderr, "%s: Unable to fix mode on %s: %s\n",
Argv[0], _PATH_SUDOERS, strerror(errno));
}
}
set_perms(PERM_SUDOERS, 0);
if (rootstat != 0 && lstat(_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_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 %ld, should be %d", _PATH_SUDOERS,
(long) statbuf.st_uid, SUDOERS_UID);
else if (statbuf.st_gid != SUDOERS_GID)
log_error(0, "%s is owned by gid %ld, should be %d", _PATH_SUDOERS,
(long) statbuf.st_gid, 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, 0);
}
static void
clean_env(envp, badenv_table)
char **envp;
struct env_table *badenv_table;
{
struct env_table *bad;
char **cur;
for (cur = envp; *cur; cur++) {
for (bad = badenv_table; bad->name; bad++) {
if (strncmp(*cur, bad->name, bad->len) == 0) {
char **move;
for (move = cur; *move; move++)
*move = *(move + 1);
cur--;
break;
}
}
}
}
void
set_perms(perm, sudo_mode)
int perm;
int sudo_mode;
{
struct passwd *pw;
if (setuid(0)) {
perror("setuid(0)");
exit(1);
}
switch (perm) {
case PERM_USER:
(void) setgid(user_gid);
if (seteuid(user_uid)) {
perror("seteuid(user_uid)");
exit(1);
}
break;
case PERM_FULL_USER:
(void) setgid(user_gid);
if (setuid(user_uid)) {
perror("setuid(user_uid)");
exit(1);
}
break;
case PERM_RUNAS:
if (**user_runas == '#') {
if (setuid(atoi(*user_runas + 1))) {
(void) fprintf(stderr,
"%s: cannot set uid to %s: %s\n",
Argv[0], *user_runas, strerror(errno));
exit(1);
}
} else {
if (!(pw = getpwnam(*user_runas))) {
(void) fprintf(stderr,
"%s: no passwd entry for %s!\n",
Argv[0], *user_runas);
exit(1);
}
if (def_flag(I_LOGNAME)) {
if (sudo_setenv("USER", pw->pw_name)) {
(void) fprintf(stderr,
"%s: cannot allocate memory!\n",
Argv[0]);
exit(1);
}
if (sudo_setenv("LOGNAME", pw->pw_name)) {
(void) fprintf(stderr,
"%s: cannot allocate memory!\n",
Argv[0]);
exit(1);
}
}
if (def_flag(I_LOGINCLASS)) {
if (set_loginclass(pw) > 0)
break;
}
if (setgid(pw->pw_gid)) {
(void) fprintf(stderr,
"%s: cannot set gid to %ld: %s\n",
Argv[0], (long) pw->pw_gid,
strerror(errno));
exit(1);
}
#ifdef HAVE_INITGROUPS
if (strcmp(*user_runas, "root") != 0 &&
initgroups(*user_runas, pw->pw_gid)
== -1) {
(void) fprintf(stderr,
"%s: cannot set group vector: %s\n",
Argv[0], strerror(errno));
exit(1);
}
#endif
if (setuid(pw->pw_uid)) {
(void) fprintf(stderr,
"%s: cannot set uid to %ld: %s\n",
Argv[0], (long) pw->pw_uid,
strerror(errno));
exit(1);
}
if (sudo_mode & MODE_RESET_HOME)
runas_homedir = pw->pw_dir;
}
break;
case PERM_SUDOERS:
if (setgid(SUDOERS_GID)) {
perror("setgid(SUDOERS_GID)");
exit(1);
}
if (SUDOERS_UID == 0) {
if ((SUDOERS_MODE & 040) && seteuid(1)) {
perror("seteuid(1)");
exit(1);
}
} else {
if (seteuid(SUDOERS_UID)) {
perror("seteuid(SUDOERS_UID)");
exit(1);
}
}
break;
}
}
static void
initial_setup()
{
int fd, maxfd;
#ifdef HAVE_SETRLIMIT
struct rlimit rl;
#endif
#ifdef POSIX_SIGNALS
struct sigaction sa;
#endif
#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
(void) getrlimit(RLIMIT_CORE, &corelimit);
rl.rlim_cur = rl.rlim_max = 0;
(void) setrlimit(RLIMIT_CORE, &rl);
#endif
#ifdef HAVE_SYSCONF
maxfd = sysconf(_SC_OPEN_MAX) - 1;
#else
maxfd = getdtablesize() - 1;
#endif
#ifdef RLIMIT_NOFILE
if (getrlimit(RLIMIT_NOFILE, &rl) == 0) {
if (rl.rlim_max != RLIM_INFINITY && rl.rlim_max <= maxfd)
maxfd = rl.rlim_max - 1;
}
#endif
for (fd = maxfd; fd > STDERR_FILENO; fd--)
(void) close(fd);
#ifdef POSIX_SIGNALS
(void) memset((VOID *)&sa, 0, sizeof(sa));
sa.sa_handler = reapchild;
(void) sigaction(SIGCHLD, &sa, NULL);
#else
(void) signal(SIGCHLD, reapchild);
#endif
}
#ifdef HAVE_LOGINCAP
static int
set_loginclass(pw)
struct passwd *pw;
{
login_cap_t *lc;
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) {
(void) fprintf(stderr, "%s: only root can use -c %s\n",
Argv[0], login_class);
exit(1);
}
} 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);
return(0);
}
if (setusercontext(lc, pw, pw->pw_uid,
LOGIN_SETUSER|LOGIN_SETGROUP|LOGIN_SETRESOURCES|LOGIN_SETPRIORITY) < 0)
log_error(NO_MAIL|USE_ERRNO|MSG_ONLY,
"setusercontext() failed for login class %s", login_class);
login_close(lc);
return(1);
}
#else
static int
set_loginclass(pw)
struct passwd *pw;
{
return(0);
}
#endif
void
set_fqdn()
{
struct hostent *hp;
char *p;
if (def_flag(I_FQDN)) {
if (!(hp = gethostbyname(user_host))) {
log_error(USE_ERRNO|MSG_ONLY|NO_EXIT,
"unable to lookup %s via gethostbyname()", user_host);
} else {
free(user_host);
user_host = estrdup(hp->h_name);
}
}
if (user_shost != user_host)
free(user_shost);
if ((p = strchr(user_host, '.'))) {
*p = '\0';
user_shost = estrdup(user_host);
*p = '.';
} else {
user_shost = user_host;
}
}
static struct passwd *
get_authpw()
{
struct passwd *pw;
if (def_ival(I_ROOTPW)) {
if ((pw = sudo_getpwuid(0)) == NULL)
log_error(0, "uid 0 does not exist in the passwd file!");
} else if (def_ival(I_RUNASPW)) {
if ((pw = sudo_getpwnam(def_str(I_RUNAS_DEF))) == NULL)
log_error(0, "user %s does not exist in the passwd file!",
def_str(I_RUNAS_DEF));
} else if (def_ival(I_TARGETPW)) {
if (**user_runas == '#') {
if ((pw = sudo_getpwuid(atoi(*user_runas + 1))) == NULL)
log_error(0, "uid %s does not exist in the passwd file!",
user_runas);
} else {
if ((pw = sudo_getpwnam(*user_runas)) == NULL)
log_error(0, "user %s does not exist in the passwd file!",
user_runas);
}
} else
pw = sudo_user.pw;
return(pw);
}
static void
usage_excl(exit_val)
int exit_val;
{
(void) fprintf(stderr,
"Only one of the -h, -k, -K, -l, -s, -v or -V options may be used\n");
usage(exit_val);
}
static void
usage(exit_val)
int exit_val;
{
(void) fprintf(stderr,
"usage: %s -V | -h | -L | -l | -v | -k | -K | [-H] [-S] [-b]\n%*s",
Argv[0], (int) strlen(Argv[0]) + 8, " ");
#ifdef HAVE_LOGINCAP
(void) fprintf(stderr, "[-p prompt] [-u username/#uid] [-c class] -s | <command>\n");
#else
(void) fprintf(stderr, "[-p prompt] [-u username/#uid] -s | <command>\n");
#endif
exit(exit_val);
}