/*
- * Copyright (c) 1993-1996,1998-2007 Todd C. Miller <Todd.Miller@courtesan.com>
+ * Copyright (c) 1993-1996, 1998-2010 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
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/wait.h>
#include <sys/param.h>
#include <sys/socket.h>
#ifdef HAVE_SETRLIMIT
# include <memory.h>
# endif
# include <string.h>
-#else
-# ifdef HAVE_STRINGS_H
-# include <strings.h>
-# endif
#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
-#ifdef HAVE_ERR_H
-# include <err.h>
-#else
-# include "emul/err.h"
-#endif /* HAVE_ERR_H */
#include <pwd.h>
+#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
# include <project.h>
# include <sys/task.h>
#endif
+#ifdef HAVE_MBR_CHECK_MEMBERSHIP
+# include <membership.h>
+#endif
#include "sudo.h"
+#include "lbuf.h"
#include "interfaces.h"
-#include "version.h"
+#include <sudo_usage.h>
-#ifndef lint
-__unused __unused static const char rcsid[] = "$Sudo: sudo.c,v 1.369.2.34 2007/12/13 14:12:49 millert Exp $";
-#endif /* lint */
+#ifdef USING_NONUNIX_GROUPS
+# include "nonunix.h"
+#endif
+
+#if defined(HAVE_PAM) && !defined(NO_PAM_SESSION)
+# define CMND_WAIT TRUE
+#else
+# define CMND_WAIT FALSE
+#endif
/*
* Prototypes
*/
-static int init_vars __P((int, char **));
-static int parse_args __P((int, char **));
-static void check_sudoers __P((void));
+static void init_vars __P((char **));
+static int set_cmnd __P((int));
static void initial_setup __P((void));
static void set_loginclass __P((struct passwd *));
static void set_project __P((struct passwd *));
-static void usage __P((int))
- __attribute__((__noreturn__));
-static void usage_excl __P((int))
- __attribute__((__noreturn__));
-static void usage_excl __P((int));
+static void set_runasgr __P((char *));
+static void set_runaspw __P((char *));
+static void show_version __P((void));
static struct passwd *get_authpw __P((void));
+static void create_admin_success_flag __P((void));
extern int sudo_edit __P((int, char **, char **));
-extern void list_matches __P((void));
-extern char **rebuild_env __P((char **, int, int));
-extern void validate_env_vars __P((struct list_member *));
-extern char **insert_env_vars __P((char **, struct list_member *));
-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 *));
+int run_command __P((const char *path, char *argv[], char *envp[], uid_t uid, int dowait)); /* XXX should be in sudo.h */
/*
* Globals
int Argc, NewArgc;
char **Argv, **NewArgv;
char *prev_user;
+int user_closefrom = -1;
struct sudo_user sudo_user;
-struct passwd *auth_pw;
-FILE *sudoers_fp;
+struct passwd *auth_pw, *list_pw;
struct interface *interfaces;
int num_interfaces;
int tgetpass_flags;
+int long_list;
uid_t timestamp_uid;
extern int errorlineno;
+extern int parse_error;
+extern char *errorfile;
#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
static struct rlimit corelimit;
#endif /* RLIMIT_CORE && !SUDO_DEVEL */
+#if defined(__linux__)
+static struct rlimit nproclimit;
+#endif
#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 */
-sigaction_t saved_sa_int, saved_sa_quit, saved_sa_tstp, saved_sa_chld;
+sigaction_t saved_sa_int, saved_sa_quit, saved_sa_tstp;
+char *runas_user;
+char *runas_group;
+static struct sudo_nss_list *snl;
+int sudo_mode;
+/* For getopt(3) */
+extern char *optarg;
+extern int optind;
int
main(argc, argv, envp)
int argc;
- char **argv;
- char **envp;
+ char *argv[];
+ char *envp[];
{
- int validated;
- int fd;
- int cmnd_status;
- int sudo_mode;
- int pwflag;
+ int sources = 0, validated;
+ int fd, cmnd_status, pwflag, rc = 0;
sigaction_t sa;
- extern int printmatches;
- extern char **environ;
+ struct sudo_nss *nss;
+#if defined(SUDO_DEVEL) && defined(__OpenBSD__)
+ extern char *malloc_options;
+ malloc_options = "AFGJPR";
+#endif
#ifdef HAVE_SETLOCALE
setlocale(LC_ALL, "");
#endif /* HAVE_GETPRPWNAM && HAVE_SET_AUTH_PARAMETERS */
if (geteuid() != 0)
- errx(1, "must be setuid root");
+ errorx(1, "must be setuid root");
/*
* Signal setup:
* 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);
- sa.sa_handler = reapchild;
- (void) sigaction(SIGCHLD, &sa, &saved_sa_chld);
+
+ /* Initialize environment functions (including replacements). */
+ env_init(FALSE);
/*
- * Turn off core dumps and close open files.
+ * Turn off core dumps and make sure fds 0-2 are open.
*/
initial_setup();
- setpwent();
+ sudo_setpwent();
+ sudo_setgrent();
/* Parse our arguments. */
sudo_mode = parse_args(Argc, Argv);
user_cmnd = "shell";
else if (ISSET(sudo_mode, MODE_EDIT))
user_cmnd = "sudoedit";
- else
+ else {
switch (sudo_mode) {
case MODE_VERSION:
- (void) printf("Sudo version %s\n", version);
- if (getuid() == 0) {
- putchar('\n');
- (void) printf("Sudoers path: %s\n", _PATH_SUDOERS);
- dump_auth_methods();
- dump_defaults();
- dump_interfaces();
- }
- exit(0);
+ show_version();
break;
case MODE_HELP:
usage(0);
break;
case MODE_VALIDATE:
+ case MODE_VALIDATE|MODE_INVALIDATE:
user_cmnd = "validate";
pwflag = I_VERIFYPW;
break;
exit(0);
break;
case MODE_LIST:
+ case MODE_LIST|MODE_INVALIDATE:
user_cmnd = "list";
pwflag = I_LISTPW;
- printmatches = 1;
+ break;
+ case MODE_CHECK:
+ case MODE_CHECK|MODE_INVALIDATE:
+ pwflag = I_LISTPW;
break;
}
+ }
/* Must have a command to run... */
if (user_cmnd == NULL && NewArgc == 0)
usage(1);
- cmnd_status = init_vars(sudo_mode, environ);
+ init_vars(envp); /* XXX - move this later? */
-#ifdef HAVE_LDAP
- validated = sudo_ldap_check(pwflag);
+#ifdef USING_NONUNIX_GROUPS
+ sudo_nonunix_groupcheck_init(); /* initialise nonunix groups impl */
+#endif /* USING_NONUNIX_GROUPS */
- /* Skip reading /etc/sudoers if LDAP told us to */
- if (def_ignore_local_sudoers); /* skips */
- else if (ISSET(validated, VALIDATE_OK) && !printmatches); /* skips */
- else if (ISSET(validated, VALIDATE_OK) && printmatches)
- {
- check_sudoers(); /* check mode/owner on _PATH_SUDOERS */
+ /* Parse nsswitch.conf for sudoers order. */
+ snl = sudo_read_nss();
- /* User is found in LDAP and we want a list of all sudo commands the
- * user can do, so consult sudoers but throw away result.
- */
- sudoers_lookup(pwflag);
+ /* 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");
+ }
+ }
+ if (sources == 0)
+ log_error(0, "no valid sudoers sources found, quitting");
+
+ /* XXX - collect post-sudoers parse settings into a function */
+
+ /*
+ * Set runas passwd/group entries based on command line or sudoers.
+ * Note that if runas_group was specified without runas_user we
+ * defer setting runas_pw so the match routines know to ignore it.
+ */
+ if (runas_group != NULL) {
+ set_runasgr(runas_group);
+ if (runas_user != NULL)
+ set_runaspw(runas_user);
+ } else
+ set_runaspw(runas_user ? runas_user : def_runas_default);
+
+ if (!update_defaults(SETDEF_RUNAS))
+ log_error(NO_STDERR|NO_EXIT, "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);
+
+ /* Update initial shell now that runas is set. */
+ if (ISSET(sudo_mode, MODE_LOGIN_SHELL))
+ NewArgv[0] = runas_pw->pw_shell;
+
+ /* This goes after sudoers is parsed since it may have timestamp options. */
+ if (sudo_mode == MODE_KILL || sudo_mode == MODE_INVALIDATE) {
+ remove_timestamp((sudo_mode == MODE_KILL));
+ cleanup(0);
+ exit(0);
+ }
+
+ /* Is root even allowed to run sudo? */
+ 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);
+ }
+
+ /* Check for -C overriding def_closefrom. */
+ if (user_closefrom >= 0 && user_closefrom != def_closefrom) {
+ if (!def_closefrom_override)
+ errorx(1, "you are not permitted to use the -C option");
+ else
+ def_closefrom = user_closefrom;
+ }
+
+ cmnd_status = set_cmnd(sudo_mode);
+
+#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");
}
- else
#endif
- {
- check_sudoers(); /* check mode/owner on _PATH_SUDOERS */
- /* Validate the user but don't search for pseudo-commands. */
- validated = sudoers_lookup(pwflag);
+ 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 */
+ if (nss->ret_if_found)
+ break;
+ } else {
+ /* Handle [NOTFOUND=return] */
+ if (nss->ret_if_notfound)
+ break;
+ }
}
+
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);
+
/*
* Look up the timestamp dir owner if one is specified.
*/
struct passwd *pw;
if (*def_timestampowner == '#')
- pw = getpwuid(atoi(def_timestampowner + 1));
+ pw = sudo_getpwuid(atoi(def_timestampowner + 1));
else
- pw = getpwnam(def_timestampowner);
+ pw = sudo_getpwnam(def_timestampowner);
if (!pw)
log_error(0, "timestamp owner (%s): No such user",
def_timestampowner);
timestamp_uid = pw->pw_uid;
}
- /* This goes after the sudoers parse since we honor sudoers options. */
- 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);
-
- /* Is root even allowed to run sudo? */
- 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 given the -P option, set the "preserve_groups" flag. */
if (ISSET(sudo_mode, MODE_PRESERVE_GROUPS))
def_preserve_groups = TRUE;
/* Bail if a tty is required and we don't have one. */
if (def_requiretty) {
- if ((fd = open(_PATH_TTY, O_RDWR|O_NOCTTY)) == -1)
+ if ((fd = open(_PATH_TTY, O_RDWR|O_NOCTTY)) == -1) {
+ audit_failure(NewArgv, "no tty");
log_error(NO_MAIL, "sorry, you must have a tty to run sudo");
- else
+ } else
(void) close(fd);
}
- /* User may have overriden environment resetting via the -E flag. */
- if (ISSET(sudo_mode, MODE_PRESERVE_ENV) && ISSET(validated, FLAG_SETENV))
- def_env_reset = FALSE;
+ /* Use askpass value from sudoers unless user specified their own. */
+ if (def_askpass && !user_askpass)
+ user_askpass = def_askpass;
+
+ /*
+ * We don't reset the environment for sudoedit or if the user
+ * specified the -E command line flag and they have setenv privs.
+ */
+ if (ISSET(sudo_mode, MODE_EDIT) ||
+ (ISSET(sudo_mode, MODE_PRESERVE_ENV) && def_setenv))
+ def_env_reset = FALSE;
/* Build a new environment that avoids any nasty bits. */
- environ = rebuild_env(environ, sudo_mode, ISSET(validated, FLAG_NOEXEC));
+ rebuild_env(def_noexec);
/* Fill in passwd struct based on user we are authenticating as. */
auth_pw = get_authpw();
/* Require a password if sudoers says so. */
- if (!ISSET(validated, FLAG_NOPASS))
- check_user(validated);
+ if (def_authenticate)
+ check_user(validated, sudo_mode);
/* If run as root with SUDO_USER set, set sudo_user.pw to that user. */
- if (user_uid == 0 && prev_user != NULL && strcmp(prev_user, "root") != 0) {
+ /* XXX - causes confusion when root is not listed in sudoers */
+ if (sudo_mode & (MODE_RUN | MODE_EDIT) && prev_user != NULL) {
+ if (user_uid == 0 && strcmp(prev_user, "root") != 0) {
struct passwd *pw;
if ((pw = sudo_getpwnam(prev_user)) != NULL) {
- efree(sudo_user.pw);
sudo_user.pw = pw;
+#ifdef HAVE_MBR_CHECK_MEMBERSHIP
+ mbr_uid_to_uuid(user_uid, user_uuid);
+#endif
}
+ }
}
if (ISSET(validated, VALIDATE_OK)) {
+ /* Create Ubuntu-style dot file to indicate sudo was successful. */
+ create_admin_success_flag();
+
/* Finally tell the user if the command did not exist. */
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);
- exit(1);
+ audit_failure(NewArgv, "command in current directory");
+ errorx(1, "ignoring `%s' found in '.'\nUse `sudo ./%s' if this is the `%s' you wish to run.", user_cmnd, user_cmnd, user_cmnd);
} else if (cmnd_status == NOT_FOUND) {
- warnx("%s: command not found", user_cmnd);
- exit(1);
+ audit_failure(NewArgv, "%s: command not found", user_cmnd);
+ errorx(1, "%s: command not found", user_cmnd);
}
/* If user specified env vars make sure sudoers allows it. */
- if (ISSET(sudo_mode, MODE_RUN) && !ISSET(validated, FLAG_SETENV)) {
+ if (ISSET(sudo_mode, MODE_RUN) && !def_setenv) {
if (ISSET(sudo_mode, MODE_PRESERVE_ENV))
log_error(NO_MAIL,
"sorry, you are not allowed to preserve the environment");
validate_env_vars(sudo_user.env_vars);
}
- log_auth(validated, 1);
- if (sudo_mode == MODE_VALIDATE)
- exit(0);
- else if (sudo_mode == MODE_LIST) {
- list_matches();
-#ifdef HAVE_LDAP
- sudo_ldap_list_matches();
+#ifdef _PATH_SUDO_IO_LOGDIR
+ /* Get next session ID so we can log it. */
+ if (ISSET(sudo_mode, (MODE_RUN | MODE_EDIT)) && (def_log_input || def_log_output))
+ io_nextid();
+#endif
+ log_allowed(validated);
+ if (ISSET(sudo_mode, MODE_CHECK))
+ rc = display_cmnd(snl, list_pw ? list_pw : sudo_user.pw);
+ else if (ISSET(sudo_mode, MODE_LIST))
+ display_privs(snl, list_pw ? list_pw : sudo_user.pw);
+
+ /* Cleanup sudoers sources */
+ tq_foreach_fwd(snl, nss)
+ nss->close(nss);
+
+#ifdef USING_NONUNIX_GROUPS
+ /* Finished with the groupcheck code */
+ sudo_nonunix_groupcheck_cleanup();
#endif
- exit(0);
- }
-
- /* Override user's umask if configured to do so. */
- if (def_umask != 0777)
- (void) umask(def_umask);
-
- /* Restore coredumpsize resource limit. */
-#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
- (void) setrlimit(RLIMIT_CORE, &corelimit);
-#endif /* RLIMIT_CORE && !SUDO_DEVEL */
- /* Become specified user or root if executing a command. */
- if (ISSET(sudo_mode, MODE_RUN))
- set_perms(PERM_FULL_RUNAS);
+ /* Deferred exit due to sudo_ldap_close() */
+ if (ISSET(sudo_mode, (MODE_VALIDATE|MODE_CHECK|MODE_LIST)))
+ exit(rc);
- /* Close the password and group files */
- endpwent();
- endgrent();
+ /* Must audit before uid change. */
+ audit_success(NewArgv);
if (ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
char *p;
*p = '-';
NewArgv[0] = p;
- /* Change to target user's homedir. */
- if (chdir(runas_pw->pw_dir) == -1)
- warn("unable to change directory to %s", runas_pw->pw_dir);
+#if defined(__linux__) || defined(_AIX)
+ /* Insert system-wide environment variables. */
+ read_env_file(_PATH_ENVIRONMENT, TRUE);
+#endif
}
- if (ISSET(sudo_mode, MODE_EDIT))
- exit(sudo_edit(NewArgc, NewArgv, envp));
+ if (ISSET(sudo_mode, MODE_RUN)) {
+ /* Insert system-wide environment variables. */
+ if (def_env_file)
+ read_env_file(def_env_file, FALSE);
- /* Insert user-specified environment variables. */
- environ = insert_env_vars(environ, sudo_user.env_vars);
+ /* 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);
- (void) sigaction(SIGCHLD, &saved_sa_chld, NULL);
-#ifndef PROFILING
- if (ISSET(sudo_mode, MODE_BACKGROUND) && fork() > 0)
- exit(0);
- else
- execve(safe_cmnd, NewArgv, environ);
-#else
- exit(0);
-#endif /* PROFILING */
- /*
- * If we got here then the exec() failed...
- */
- if (errno == ENOEXEC) {
- NewArgv--; /* at least one extra slot... */
- NewArgv[0] = "sh";
- NewArgv[1] = safe_cmnd;
- execve(_PATH_BSHELL, NewArgv, environ);
+ if (ISSET(sudo_mode, MODE_EDIT)) {
+ exit(sudo_edit(NewArgc, NewArgv, envp));
+ } else {
+ exit(run_command(safe_cmnd, NewArgv, env_get(), runas_pw->pw_uid,
+ CMND_WAIT));
}
- warn("unable to execute %s", safe_cmnd);
- exit(127);
- } else if (ISSET(validated, FLAG_NO_USER) || (validated & FLAG_NO_HOST)) {
- log_auth(validated, 1);
+ } else if (ISSET(validated, FLAG_NO_USER | FLAG_NO_HOST)) {
+ audit_failure(NewArgv, "No user or host");
+ log_denial(validated, 1);
exit(1);
- } else if (ISSET(validated, VALIDATE_NOT_OK)) {
+ } else {
if (def_path_info) {
/*
* We'd like to not leak path info at all here, but that can
* is just "no foo in path" since the user can trivially set
* their path to just contain a single dir.
*/
- log_auth(validated,
+ log_denial(validated,
!(cmnd_status == NOT_FOUND_DOT || cmnd_status == NOT_FOUND));
if (cmnd_status == NOT_FOUND)
- warnx("%s: command not found", user_cmnd);
+ warningx("%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);
+ 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_auth(validated, 1);
+ log_denial(validated, 1);
}
- exit(1);
- } else {
- /* should never get here */
- log_auth(validated, 1);
+ audit_failure(NewArgv, "validation failure");
exit(1);
}
exit(0); /* not reached */
* Initialize timezone, set umask, fill in ``sudo_user'' struct and
* load the ``interfaces'' array.
*/
-static int
-init_vars(sudo_mode, envp)
- int sudo_mode;
+static void
+init_vars(envp)
char **envp;
{
- char *p, **ep, thost[MAXHOSTNAMELEN];
- int nohostname, rval;
+ char *p, **ep, thost[MAXHOSTNAMELEN + 1];
+ int nohostname;
/* Sanity check command from user. */
if (user_cmnd == NULL && strlen(NewArgv[0]) >= PATH_MAX)
- errx(1, "%s: File name too long", NewArgv[0]);
+ errorx(1, "%s: File name too long", NewArgv[0]);
#ifdef HAVE_TZSET
(void) tzset(); /* set the timezone if applicable */
* "shost" is the unqualified form of the hostname.
*/
nohostname = gethostname(thost, sizeof(thost));
- if (nohostname)
+ if (nohostname) {
user_host = user_shost = "localhost";
- else {
+ } else {
+ thost[sizeof(thost) - 1] = '\0';
user_host = estrdup(thost);
- if (def_fqdn) {
- /* Defer call to set_fqdn() until log_error() is safe. */
- user_shost = user_host;
+ if ((p = strchr(user_host, '.'))) {
+ *p = '\0';
+ user_shost = estrdup(user_host);
+ *p = '.';
} else {
- if ((p = strchr(user_host, '.'))) {
- *p = '\0';
- user_shost = estrdup(user_host);
- *p = '.';
- } else {
- user_shost = user_host;
- }
+ user_shost = user_host;
}
}
- if ((p = ttyname(STDIN_FILENO)) || (p = ttyname(STDOUT_FILENO))) {
+ if ((p = ttyname(STDIN_FILENO)) || (p = ttyname(STDOUT_FILENO)) ||
+ (p = ttyname(STDERR_FILENO))) {
user_tty = user_ttypath = estrdup(p);
if (strncmp(user_tty, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
user_tty += sizeof(_PATH_DEV) - 1;
user_tty = "unknown";
for (ep = envp; *ep; ep++) {
+ /* XXX - don't fill in if empty string */
switch (**ep) {
+ case 'D':
+ if (strncmp("DISPLAY=", *ep, 8) == 0)
+ user_display = *ep + 8;
+ break;
+ case 'K':
+ if (strncmp("KRB5CCNAME=", *ep, 11) == 0)
+ user_ccname = *ep + 11;
+ break;
case 'P':
if (strncmp("PATH=", *ep, 5) == 0)
user_path = *ep + 5;
user_prompt = *ep + 12;
else if (strncmp("SUDO_USER=", *ep, 10) == 0)
prev_user = *ep + 10;
+ else if (strncmp("SUDO_ASKPASS=", *ep, 13) == 0)
+ user_askpass = *ep + 13;
break;
-
}
}
* 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_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 (sudo_mode == MODE_KILL || sudo_mode == MODE_INVALIDATE)
+ errorx(1, "unknown uid: %s", pw_name);
+ log_error(0, "unknown uid: %s", pw_name);
}
+#ifdef HAVE_MBR_CHECK_MEMBERSHIP
+ mbr_uid_to_uuid(user_uid, user_uuid);
+#endif
if (user_shell == NULL || *user_shell == '\0')
- user_shell = sudo_user.pw->pw_shell;
+ user_shell = estrdup(sudo_user.pw->pw_shell);
/* It is now safe to use log_error() and set_perms() */
user_groups = emalloc2(user_ngroups, sizeof(GETGROUPS_T));
if (getgroups(user_ngroups, user_groups) < 0)
log_error(USE_ERRNO|MSG_ONLY, "can't get group vector");
- } else
- user_ngroups = 0;
+ }
#endif
- if (def_fqdn)
- set_fqdn(); /* may call log_error() */
-
if (nohostname)
log_error(USE_ERRNO|MSG_ONLY, "can't get hostname");
- set_runaspw(*user_runas); /* may call log_error() */
- if (*user_runas[0] == '#' && runas_pw->pw_name && runas_pw->pw_name[0])
- *user_runas = estrdup(runas_pw->pw_name);
-
/*
* Get current working directory. Try as user, fall back to root.
*/
if (!getcwd(user_cwd, sizeof(user_cwd))) {
set_perms(PERM_ROOT);
if (!getcwd(user_cwd, sizeof(user_cwd))) {
- warnx("cannot get working directory");
+ warningx("cannot get working directory");
(void) strlcpy(user_cwd, "unknown", sizeof(user_cwd));
}
} else
* If we were given the '-e', '-i' or '-s' options we need to redo
* NewArgv and NewArgc.
*/
- if ((sudo_mode & (MODE_SHELL | MODE_EDIT))) {
- char **dst, **src = NewArgv;
+ if (ISSET(sudo_mode, MODE_EDIT)) {
+ NewArgv--;
+ NewArgc++;
+ NewArgv[0] = "sudoedit";
+ } else if (ISSET(sudo_mode, MODE_SHELL)) {
+ char **av;
/* Allocate an extra slot for execve() failure (ENOEXEC). */
- NewArgv = (char **) emalloc2((++NewArgc + 2), sizeof(char *));
- NewArgv++;
- 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
- errx(1, "unable to determine shell");
-
- /* copy the args from NewArgv */
- for (dst = NewArgv + 1; (*dst = *src) != NULL; ++src, ++dst)
- continue;
+ av = (char **) emalloc2(5, sizeof(char *));
+ av++;
+
+ av[0] = user_shell; /* may be updated later */
+ if (NewArgc > 0) {
+ size_t cmnd_size = 1024;
+ char *cmnd, *src, *dst, **ap;
+
+ cmnd = dst = emalloc(cmnd_size);
+ for (ap = NewArgv; *ap != NULL; ap++) {
+ for (src = *ap; *src != '\0'; src++) {
+ /* reserve room for an escaped char + space */
+ if (cmnd_size < (dst - cmnd) + 3) {
+ char *new_cmnd;
+ cmnd_size <<= 1;
+ new_cmnd = erealloc(cmnd, cmnd_size);
+ dst = new_cmnd + (dst - cmnd);
+ cmnd = new_cmnd;
+ }
+ if (isalnum((unsigned char)*src) || *src == '_' || *src == '-') {
+ *dst++ = *src;
+ } else {
+ /* quote potential meta character */
+ *dst++ = '\\';
+ *dst++ = *src;
+ }
+ }
+ *dst++ = ' ';
+ }
+ if (cmnd != dst)
+ dst--; /* replace last space with a NUL */
+ *dst = '\0';
+ av[1] = "-c";
+ av[2] = cmnd;
+ NewArgc = 2;
+ }
+ av[++NewArgc] = NULL;
+ NewArgv = av;
}
+}
- /* Set login class if applicable. */
- set_loginclass(sudo_user.pw);
+/*
+ * Fill in user_cmnd, user_args, user_base and user_stat variables
+ * and apply any command-specific defaults entries.
+ */
+static int
+set_cmnd(sudo_mode)
+ int sudo_mode;
+{
+ int rval;
+ char *path = user_path;
/* Set project if applicable. */
set_project(runas_pw);
/* Resolve the path and return. */
rval = FOUND;
user_stat = emalloc(sizeof(struct stat));
- if (sudo_mode & (MODE_RUN | MODE_EDIT)) {
- if (ISSET(sudo_mode, MODE_RUN)) {
- /* XXX - default_runas may be modified during parsing of sudoers */
+ if (sudo_mode & (MODE_RUN | MODE_EDIT | MODE_CHECK)) {
+ if (ISSET(sudo_mode, MODE_RUN | MODE_CHECK)) {
+ if (def_secure_path && !user_is_exempt())
+ path = def_secure_path;
set_perms(PERM_RUNAS);
- rval = find_path(NewArgv[0], &user_cmnd, user_stat, user_path);
+ rval = find_path(NewArgv[0], &user_cmnd, user_stat, path,
+ def_ignore_dot);
set_perms(PERM_ROOT);
if (rval != FOUND) {
/* Failed as root, try as invoking user. */
set_perms(PERM_USER);
- rval = find_path(NewArgv[0], &user_cmnd, user_stat, user_path);
+ rval = find_path(NewArgv[0], &user_cmnd, user_stat, path,
+ def_ignore_dot);
set_perms(PERM_ROOT);
}
}
size_t size, n;
/* If we didn't realloc NewArgv it is contiguous so just count. */
- if (!(sudo_mode & (MODE_SHELL | MODE_EDIT))) {
+ if (!ISSET(sudo_mode, MODE_SHELL)) {
size = (size_t) (NewArgv[NewArgc-1] - NewArgv[1]) +
strlen(NewArgv[NewArgc-1]) + 1;
} else {
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");
+ errorx(1, "internal error, init_vars() overflow");
to += n;
*to++ = ' ';
}
else
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 */
+
return(rval);
}
/*
- * Command line argument parsing, can't use getopt(3).
+ * Setup the execution environment immediately prior to the call to execve()
+ * Returns TRUE on success and FALSE on failure.
*/
-static int
-parse_args(argc, argv)
- int argc;
- char **argv;
+int
+exec_setup(rbac_enabled, ttyname, ttyfd)
+ int rbac_enabled;
+ const char *ttyname;
+ int ttyfd;
{
- int rval = MODE_RUN; /* what mode is sudo to be run in? */
- int excl = 0; /* exclusive arg, no others allowed */
-
- NewArgv = argv + 1;
- NewArgc = argc - 1;
-
- /* First, check to see if we were invoked as "sudoedit". */
- if (strcmp(getprogname(), "sudoedit") == 0) {
- rval = MODE_EDIT;
- excl = 'e';
- } else
- rval = MODE_RUN;
-
- while (NewArgc > 0) {
- if (NewArgv[0][0] == '-') {
- if (NewArgv[0][1] != '\0' && NewArgv[0][2] != '\0') {
- warnx("please use single character options");
- usage(1);
- }
+ int rval = FALSE;
- switch (NewArgv[0][1]) {
- case 'p':
- /* Must have an associated prompt. */
- if (NewArgv[1] == NULL)
- usage(1);
-
- user_prompt = NewArgv[1];
- def_passprompt_override = TRUE;
-
- NewArgc--;
- NewArgv++;
- break;
- case 'u':
- /* Must have an associated runas user. */
- if (NewArgv[1] == NULL)
- usage(1);
-
- user_runas = &NewArgv[1];
-
- NewArgc--;
- NewArgv++;
- break;
-#ifdef HAVE_BSD_AUTH_H
- case 'a':
- /* Must have an associated authentication style. */
- if (NewArgv[1] == NULL)
- usage(1);
-
- login_style = NewArgv[1];
-
- NewArgc--;
- NewArgv++;
- break;
+#ifdef HAVE_SELINUX
+ if (rbac_enabled) {
+ if (selinux_setup(user_role, user_type, ttyname, ttyfd) == -1)
+ goto done;
+ }
#endif
-#ifdef HAVE_LOGIN_CAP_H
- case 'c':
- /* Must have an associated login class. */
- if (NewArgv[1] == NULL)
- usage(1);
- login_class = NewArgv[1];
- def_use_loginclass = TRUE;
+ /* Close the password and group files and free up memory. */
+ sudo_endpwent();
+ sudo_endgrent();
- 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 'E':
- SET(rval, MODE_PRESERVE_ENV);
- break;
- case '-':
- NewArgc--;
- NewArgv++;
- goto args_done;
- case '\0':
- warnx("'-' requires an argument");
- usage(1);
- default:
- warnx("illegal option `%s'", NewArgv[0]);
- usage(1);
- }
- } else if (NewArgv[0][0] != '/' && strchr(NewArgv[0], '=') != NULL) {
- /* Could be an environment variable. */
- struct list_member *ev;
- ev = emalloc(sizeof(*ev));
- ev->value = NewArgv[0];
- ev->next = sudo_user.env_vars;
- sudo_user.env_vars = ev;
+ /*
+ * For sudoedit, the command runas a the user with no additional setup.
+ */
+ if (ISSET(sudo_mode, MODE_EDIT)) {
+ set_perms(PERM_FULL_USER);
+ rval = TRUE;
+ goto done;
+ }
+
+ /*
+ * Set umask based on sudoers.
+ * If user's umask is more restrictive, OR in those bits too
+ * unless umask_override is set.
+ */
+ if (def_umask != 0777) {
+ if (def_umask_override) {
+ umask(def_umask);
} else {
- /* Not an arg */
- break;
+ mode_t mask = umask(def_umask);
+ mask |= def_umask;
+ if (mask != def_umask)
+ umask(mask);
}
- NewArgc--;
- NewArgv++;
}
-args_done:
-
- if (ISSET(rval, MODE_EDIT) &&
- (ISSET(rval, MODE_PRESERVE_ENV) || sudo_user.env_vars != NULL)) {
- if (ISSET(rval, MODE_PRESERVE_ENV))
- warnx("the `-E' option is not valid in edit mode");
- if (sudo_user.env_vars != NULL)
- warnx("you may not specify environment variables in edit mode");
- usage(1);
+
+ /* Restore coredumpsize resource limit. */
+#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
+ (void) setrlimit(RLIMIT_CORE, &corelimit);
+#endif /* RLIMIT_CORE && !SUDO_DEVEL */
+
+ if (ISSET(sudo_mode, MODE_RUN))
+ set_perms(PERM_FULL_RUNAS);
+
+ if (ISSET(sudo_mode, MODE_LOGIN_SHELL)) {
+ /* Change to target user's homedir. */
+ if (chdir(runas_pw->pw_dir) == -1) {
+ warning("unable to change directory to %s", runas_pw->pw_dir);
+ goto done;
+ }
}
- 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);
+ /*
+ * Restore nproc resource limit if pam_limits didn't do it for us.
+ * We must do this *after* the uid change to avoid potential EAGAIN
+ * from setuid().
+ */
+#if defined(__linux__)
+ {
+ struct rlimit rl;
+ if (getrlimit(RLIMIT_NPROC, &rl) == 0) {
+ if (rl.rlim_cur == RLIM_INFINITY && rl.rlim_max == RLIM_INFINITY)
+ (void) setrlimit(RLIMIT_NPROC, &nproclimit);
+ }
}
- if ((NewArgc == 0 && (rval & MODE_EDIT)) ||
- (NewArgc > 0 && !(rval & (MODE_RUN | MODE_EDIT))))
- usage(1);
- if (NewArgc == 0 && rval == MODE_RUN)
- SET(rval, (MODE_IMPLIED_SHELL | MODE_SHELL));
+#endif
+
+ rval = TRUE;
+done:
return(rval);
}
/*
- * Sanity check sudoers mode/owner/type.
- * Leaves a file pointer to the sudoers file open in ``fp''.
+ * Run the command and wait for it to complete.
*/
-static void
-check_sudoers()
+int
+run_command(path, argv, envp, uid, dowait)
+ const char *path;
+ char *argv[];
+ char *envp[];
+ uid_t uid;
+ int dowait;
+{
+ struct command_status cstat;
+ int exitcode = 1;
+
+#ifdef PROFILING
+ exit(0);
+#endif
+
+ cstat.type = CMD_INVALID;
+ cstat.val = 0;
+
+ sudo_execve(path, argv, envp, uid, &cstat, dowait,
+ ISSET(sudo_mode, MODE_BACKGROUND));
+
+ switch (cstat.type) {
+ case CMD_ERRNO:
+ /* exec_setup() or execve() returned an error. */
+ warningx("unable to execute %s: %s", path, strerror(cstat.val));
+ exitcode = 127;
+ break;
+ case CMD_WSTATUS:
+ /* Command ran, exited or was killed. */
+ if (WIFEXITED(cstat.val))
+ exitcode = WEXITSTATUS(cstat.val);
+ else if (WIFSIGNALED(cstat.val))
+ exitcode = WTERMSIG(cstat.val) | 128;
+ break;
+ default:
+ warningx("unexpected child termination condition: %d", cstat.type);
+ break;
+ }
+#ifdef HAVE_PAM
+ pam_end_session();
+#endif /* HAVE_PAM */
+#ifdef _PATH_SUDO_IO_LOGDIR
+ io_log_close();
+#endif
+ return(exitcode);
+}
+
+/*
+ * Open sudoers and sanity check mode/owner/type.
+ * Returns a handle to the sudoers file or NULL on error.
+ */
+FILE *
+open_sudoers(sudoers, doedit, keepopen)
+ const char *sudoers;
+ int doedit;
+ int *keepopen;
{
struct stat statbuf;
- int rootstat, i;
+ 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(_PATH_SUDOERS, &statbuf)) == 0 &&
+ if ((rootstat = stat_sudoers(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);
+ 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(_PATH_SUDOERS,(uid_t) -1,SUDOERS_GID)) {
- warnx("set group on %s", _PATH_SUDOERS);
+ if (chown(sudoers, (uid_t) -1, SUDOERS_GID) == 0) {
+ warningx("set group on %s", sudoers);
statbuf.st_gid = SUDOERS_GID;
} else
- warn("unable to set group on %s", _PATH_SUDOERS);
+ warning("unable to set group on %s", sudoers);
}
} else
- warn("unable to fix mode on %s", _PATH_SUDOERS);
+ warning("unable to fix mode on %s", sudoers);
}
/*
*/
set_perms(PERM_SUDOERS);
- if (rootstat != 0 && stat_sudoers(_PATH_SUDOERS, &statbuf) != 0)
- log_error(USE_ERRNO, "can't stat %s", _PATH_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(0, "%s is not a regular file", _PATH_SUDOERS);
- else if (statbuf.st_size == 0)
- log_error(0, "%s is zero length", _PATH_SUDOERS);
+ log_error(NO_EXIT, "%s is not a regular file", sudoers);
else if ((statbuf.st_mode & 07777) != SUDOERS_MODE)
- log_error(0, "%s is mode 0%o, should be 0%o", _PATH_SUDOERS,
+ 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(0, "%s is owned by uid %lu, should be %lu", _PATH_SUDOERS,
+ log_error(NO_EXIT, "%s is owned by uid %lu, should be %lu", 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,
+ log_error(NO_EXIT, "%s is owned by gid %lu, should be %lu", sudoers,
(unsigned long) statbuf.st_gid, (unsigned long) SUDOERS_GID);
+ else if ((fp = fopen(sudoers, "r")) == NULL)
+ log_error(USE_ERRNO|NO_EXIT, "can't open %s", sudoers);
else {
- /* Solaris sometimes returns EAGAIN so try 10 times */
- for (i = 0; i < 10 ; i++) {
- errno = 0;
- if ((sudoers_fp = fopen(_PATH_SUDOERS, "r")) == NULL ||
- fgetc(sudoers_fp) == EOF) {
- if (sudoers_fp != NULL)
- fclose(sudoers_fp);
- sudoers_fp = NULL;
- if (errno != EAGAIN && errno != EWOULDBLOCK)
- break;
- } else
- break;
- sleep(1);
+ /*
+ * 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 (sudoers_fp == NULL)
- log_error(USE_ERRNO, "can't open %s", _PATH_SUDOERS);
+ }
+
+ if (fp != NULL) {
+ rewind(fp);
+ (void) fcntl(fileno(fp), F_SETFD, 1);
}
set_perms(PERM_ROOT); /* change back to root */
+ return(fp);
}
/*
* Close all open files (except std*) and turn off core dumps.
+ * Also sets the set_perms() pointer to the correct function.
*/
static void
initial_setup()
{
int miss[3], devnull = -1;
-#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
+#if defined(__linux__) || (defined(RLIMIT_CORE) && !defined(SUDO_DEVEL))
struct rlimit rl;
+#endif
+#if defined(__linux__)
+ /*
+ * Unlimit the number of processes since Linux's setuid() will
+ * apply resource limits when changing uid and return EAGAIN if
+ * nproc would be violated by the uid switch.
+ */
+ (void) getrlimit(RLIMIT_NPROC, &nproclimit);
+ rl.rlim_cur = rl.rlim_max = RLIM_INFINITY;
+ if (setrlimit(RLIMIT_NPROC, &rl)) {
+ memcpy(&rl, &nproclimit, sizeof(struct rlimit));
+ rl.rlim_cur = rl.rlim_max;
+ (void)setrlimit(RLIMIT_NPROC, &rl);
+ }
+#endif /* __linux__ */
+#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
/*
* Turn off core dumps.
*/
miss[STDOUT_FILENO] = fcntl(STDOUT_FILENO, F_GETFL, 0) == -1;
miss[STDERR_FILENO] = fcntl(STDERR_FILENO, F_GETFL, 0) == -1;
if (miss[STDIN_FILENO] || miss[STDOUT_FILENO] || miss[STDERR_FILENO]) {
- if ((devnull = open(_PATH_DEVNULL, O_RDWR, 0644)) != -1) {
- if (miss[STDIN_FILENO])
- (void) dup2(devnull, STDIN_FILENO);
- if (miss[STDOUT_FILENO])
- (void) dup2(devnull, STDOUT_FILENO);
- if (miss[STDERR_FILENO])
- (void) dup2(devnull, STDERR_FILENO);
- }
+ if ((devnull = open(_PATH_DEVNULL, O_RDWR, 0644)) == -1)
+ error(1, "unable to open %s", _PATH_DEVNULL);
+ if (miss[STDIN_FILENO] && dup2(devnull, STDIN_FILENO) == -1)
+ error(1, "dup2");
+ if (miss[STDOUT_FILENO] && dup2(devnull, STDOUT_FILENO) == -1)
+ error(1, "dup2");
+ if (miss[STDERR_FILENO] && dup2(devnull, STDERR_FILENO) == -1)
+ error(1, "dup2");
+ if (devnull > STDERR_FILENO)
+ close(devnull);
}
- closefrom(STDERR_FILENO + 1);
}
#ifdef HAVE_LOGIN_CAP_H
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);
+ if (user_uid != 0 &&
+ strcmp(runas_user ? runas_user : def_runas_default, "root") != 0)
+ errorx(1, "only root can use -c %s", login_class);
} else {
login_class = pw->pw_class;
if (!login_class || !*login_class)
char *p;
#ifdef HAVE_GETADDRINFO
- memset(&hint, 0, sizeof(hint));
+ zero_bytes(&hint, sizeof(hint));
hint.ai_family = PF_UNSPEC;
hint.ai_flags = AI_CANONNAME;
if (getaddrinfo(user_host, NULL, &hint, &res0) != 0) {
* Get passwd entry for the user we are going to run commands as.
* By default, this is "root". Updates runas_pw as a side effect.
*/
-int
+static void
set_runaspw(user)
char *user;
{
- if (runas_pw != NULL) {
- if (user_runas != &def_runas_default)
- return(TRUE); /* don't override -u option */
- efree(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);
+ 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);
}
+ }
+}
+
+/*
+ * Get group entry for the group we are going to run commands as.
+ * Updates runas_pw as a side effect.
+ */
+static void
+set_runasgr(group)
+ char *group;
+{
+ if (*group == '#') {
+ if ((runas_gr = sudo_getgrgid(atoi(group + 1))) == NULL)
+ runas_gr = sudo_fakegrnam(group);
} else {
- runas_pw = sudo_getpwnam(user);
- if (runas_pw == NULL)
- log_error(NO_MAIL|MSG_ONLY, "no passwd entry for %s!", user);
+ if ((runas_gr = sudo_getgrnam(group)) == NULL)
+ log_error(NO_MAIL|MSG_ONLY, "unknown group: %s", group);
}
- return(TRUE);
}
/*
struct passwd *pw;
if (def_rootpw) {
- if (runas_pw->pw_uid == 0)
- pw = runas_pw;
- else if ((pw = sudo_getpwuid(0)) == NULL)
- log_error(0, "uid 0 does not exist in the passwd file!");
+ if ((pw = sudo_getpwuid(0)) == NULL)
+ log_error(0, "unknown uid: 0");
} else if (def_runaspw) {
- if (strcmp(def_runas_default, *user_runas) == 0)
- pw = runas_pw;
- else if ((pw = sudo_getpwnam(def_runas_default)) == NULL)
- log_error(0, "user %s does not exist in the passwd file!",
- def_runas_default);
+ if ((pw = sudo_getpwnam(def_runas_default)) == NULL)
+ log_error(0, "unknown user: %s", def_runas_default);
} else if (def_targetpw) {
if (runas_pw->pw_name == NULL)
- log_error(NO_MAIL|MSG_ONLY, "no passwd entry for %lu!",
+ log_error(NO_MAIL|MSG_ONLY, "unknown uid: %lu",
(unsigned long) runas_pw->pw_uid);
pw = runas_pw;
} else
}
/*
- * Tell which options are mutually exclusive and exit.
+ * Cleanup hook for error()/errorx()
*/
-static void
-usage_excl(exit_val)
- int exit_val;
+void
+cleanup(gotsignal)
+ int gotsignal;
{
- warnx("Only one of the -e, -h, i, -k, -K, -l, -s, -v or -V options may be used");
- usage(exit_val);
-}
+ struct sudo_nss *nss;
-/*
- * Give usage message and exit.
- */
-static void
-usage(exit_val)
- int exit_val;
-{
- char **p, **uvec[4];
- int i, linelen, linemax, ulen, plen;
- static char *uvec1[] = {
- " -h |",
- " -K |",
- " -k |",
- " -L |",
- " -l |",
- " -V |",
- " -v",
- NULL
- };
- static char *uvec2[] = {
- " [-bEHPS]",
-#ifdef HAVE_BSD_AUTH_H
- " [-a auth_type]",
-#endif
-#ifdef HAVE_LOGIN_CAP_H
- " [-c class|-]",
+ if (!gotsignal) {
+ if (snl != NULL) {
+ tq_foreach_fwd(snl, nss)
+ nss->close(nss);
+ }
+#ifdef USING_NONUNIX_GROUPS
+ sudo_nonunix_groupcheck_cleanup();
#endif
- " [-p prompt]",
- " [-u username|#uid]",
- " [VAR=value]",
- " {-i | -s | <command>}",
- NULL
- };
- static char *uvec3[] = {
- " -e",
- " [-S]",
-#ifdef HAVE_BSD_AUTH_H
- " [-a auth_type]",
+ sudo_endpwent();
+ sudo_endgrent();
+#ifdef _PATH_SUDO_IO_LOGDIR
+ io_log_close();
#endif
-#ifdef HAVE_LOGIN_CAP_H
- " [-c class|-]",
+ }
+ term_restore(STDIN_FILENO, 0);
+#ifdef HAVE_SELINUX
+ selinux_restore_tty();
#endif
- " [-p prompt]",
- " [-u username|#uid]",
- " file ...",
- NULL
- };
+}
- /*
- * Use usage vectors appropriate to the progname.
- */
- if (strcmp(getprogname(), "sudoedit") == 0) {
- uvec[0] = uvec3 + 1;
- uvec[1] = NULL;
- } else {
- uvec[0] = uvec1;
- uvec[1] = uvec2;
- uvec[2] = uvec3;
- uvec[3] = NULL;
+static void
+show_version()
+{
+ (void) printf("Sudo version %s\n", PACKAGE_VERSION);
+ if (getuid() == 0) {
+ putchar('\n');
+ (void) printf("Configure args: %s\n", CONFIGURE_ARGS);
+ (void) printf("Sudoers path: %s\n", _PATH_SUDOERS);
+#ifdef HAVE_LDAP
+# ifdef _PATH_NSSWITCH_CONF
+ (void) printf("nsswitch path: %s\n", _PATH_NSSWITCH_CONF);
+# endif
+ (void) printf("ldap.conf path: %s\n", _PATH_LDAP_CONF);
+ (void) printf("ldap.secret path: %s\n", _PATH_LDAP_SECRET);
+#endif
+ dump_auth_methods();
+ dump_defaults();
+ dump_interfaces();
}
+ exit(0);
+}
- /*
- * Print usage and wrap lines as needed.
- * Assumes an 80-character wide terminal, which is kind of bogus...
- */
- ulen = (int)strlen(getprogname()) + 7;
- linemax = 80;
- for (i = 0; uvec[i] != NULL; i++) {
- printf("usage: %s", getprogname());
- linelen = linemax - ulen;
- for (p = uvec[i]; *p != NULL; p++) {
- plen = (int)strlen(*p);
- if (linelen >= plen || linelen == linemax - ulen) {
- fputs(*p, stdout);
- linelen -= plen;
- } else {
- p--;
- linelen = linemax - ulen;
- printf("\n%*s", ulen, "");
- }
- }
- putchar('\n');
+#ifdef USE_ADMIN_FLAG
+static void
+create_admin_success_flag()
+{
+ struct stat statbuf;
+ char flagfile[PATH_MAX];
+ int fd, n;
+
+ /* Check whether the user is in the admin group. */
+ if (!user_in_group(sudo_user.pw, "admin"))
+ 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;
+
+ /* Create admin flag file if it doesn't already exist. */
+ set_perms(PERM_USER);
+ if (stat(flagfile, &statbuf) == 0) {
+ set_perms(PERM_ROOT);
+ return;
}
- exit(exit_val);
+
+ fd = open(flagfile, O_CREAT|O_WRONLY|O_EXCL, 0644);
+ close(fd);
+ set_perms(PERM_ROOT);
+}
+#else /* !USE_ADMIN_FLAG */
+static void
+create_admin_success_flag()
+{
+ /* STUB */
}
+#endif /* USE_ADMIN_FLAG */
projects / debian / sudo / blobdiff