/*
- * Copyright (c) 1993-1996, 1998-2008 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 */
#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_SELINUX
-# include <selinux/selinux.h>
+#ifdef HAVE_MBR_CHECK_MEMBERSHIP
+# include <membership.h>
#endif
#include "sudo.h"
-#include "sudo_usage.h"
#include "lbuf.h"
#include "interfaces.h"
-#include "version.h"
+#include <sudo_usage.h>
-#ifndef lint
-__unused static const char rcsid[] = "$Sudo: sudo.c,v 1.500 2008/11/18 15:57:09 millert Exp $";
-#endif /* lint */
+#ifdef USING_NONUNIX_GROUPS
+# include "nonunix.h"
+#endif
+
+#ifdef HAVE_PAM
+# define CMND_WAIT TRUE
+#else
+# define CMND_WAIT FALSE
+#endif
/*
* Prototypes
*/
-static void init_vars __P((int, char **));
+static void init_vars __P((char **));
static int set_cmnd __P((int));
-static int parse_args __P((int, char **));
static void initial_setup __P((void));
static void set_loginclass __P((struct passwd *));
static void set_project __P((struct passwd *));
static void set_runasgr __P((char *));
static void set_runaspw __P((char *));
static void show_version __P((void));
-static void usage __P((int))
- __attribute__((__noreturn__));
-static void usage_excl __P((int))
- __attribute__((__noreturn__));
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 rebuild_env __P((int, int));
-void validate_env_vars __P((struct list_member *));
-void insert_env_vars __P((struct list_member *));
+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;
-static int user_closefrom = -1;
+int user_closefrom = -1;
struct sudo_user sudo_user;
struct passwd *auth_pw, *list_pw;
struct interface *interfaces;
#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;
-static char *runas_user;
-static char *runas_group;
+char *runas_user;
+char *runas_group;
static struct sudo_nss_list *snl;
+int sudo_mode;
/* For getopt(3) */
extern char *optarg;
int
main(argc, argv, envp)
int argc;
- char **argv;
- char **envp;
+ char *argv[];
+ char *envp[];
{
int sources = 0, validated;
- int fd, cmnd_status, sudo_mode, pwflag, rc = 0;
+ int fd, cmnd_status, pwflag, rc = 0;
sigaction_t sa;
struct sudo_nss *nss;
#if defined(SUDO_DEVEL) && defined(__OpenBSD__)
(void) sigaction(SIGQUIT, &sa, &saved_sa_quit);
(void) sigaction(SIGTSTP, &sa, &saved_sa_tstp);
+ /* Initialize environment functions (including replacements). */
+ env_init(FALSE);
+
/*
* Turn off core dumps and make sure fds 0-2 are open.
*/
user_cmnd = "shell";
else if (ISSET(sudo_mode, MODE_EDIT))
user_cmnd = "sudoedit";
- else
+ else {
switch (sudo_mode) {
case MODE_VERSION:
show_version();
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;
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);
- init_vars(sudo_mode, envp); /* XXX - move this later? */
+ init_vars(envp); /* XXX - move this later? */
+
+#ifdef USING_NONUNIX_GROUPS
+ sudo_nonunix_groupcheck_init(); /* initialise nonunix groups impl */
+#endif /* USING_NONUNIX_GROUPS */
/* Parse nsswitch.conf for sudoers order. */
snl = sudo_read_nss();
tq_foreach_fwd(snl, nss) {
if (nss->open(nss) == 0 && nss->parse(nss) == 0) {
sources++;
- nss->setdefs(nss);
+ if (nss->setdefs(nss) != 0)
+ log_error(NO_STDERR|NO_EXIT, "problem with defaults entries");
}
}
if (sources == 0)
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);
tq_foreach_fwd(snl, nss) {
validated = nss->lookup(nss, validated, pwflag);
- /* Handle [NOTFOUND=return] */
- if (!ISSET(validated, VALIDATE_OK) && nss->ret_notfound)
- break;
+ 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);
/* 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);
}
if (def_askpass && !user_askpass)
user_askpass = def_askpass;
- /* User may have overridden environment resetting via the -E flag. */
- if (ISSET(sudo_mode, MODE_PRESERVE_ENV) && def_setenv)
- def_env_reset = FALSE;
+ /*
+ * 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. */
- rebuild_env(sudo_mode, def_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 (def_authenticate)
- check_user(validated, !ISSET(sudo_mode, MODE_NONINTERACTIVE));
+ check_user(validated, sudo_mode);
/* If run as root with SUDO_USER set, set sudo_user.pw to that user. */
/* XXX - causes confusion when root is not listed in sudoers */
if (user_uid == 0 && strcmp(prev_user, "root") != 0) {
struct passwd *pw;
- if ((pw = sudo_getpwnam(prev_user)) != NULL)
+ if ((pw = sudo_getpwnam(prev_user)) != NULL) {
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)
+ if (cmnd_status == NOT_FOUND_DOT) {
+ 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)
+ } else if (cmnd_status == NOT_FOUND) {
+ 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) && !def_setenv) {
validate_env_vars(sudo_user.env_vars);
}
+#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 (sudo_mode == MODE_CHECK)
+ if (ISSET(sudo_mode, MODE_CHECK))
rc = display_cmnd(snl, list_pw ? list_pw : sudo_user.pw);
- else if (sudo_mode == MODE_LIST)
+ 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
+
/* Deferred exit due to sudo_ldap_close() */
- if (sudo_mode == MODE_VALIDATE || sudo_mode == MODE_CHECK ||
- sudo_mode == MODE_LIST)
+ if (ISSET(sudo_mode, (MODE_VALIDATE|MODE_CHECK|MODE_LIST)))
exit(rc);
- /*
- * Override user's umask if configured to do so.
- * If user's umask is more restrictive, OR in those bits too.
- */
- if (def_umask != 0777) {
- mode_t mask = umask(def_umask);
- mask |= def_umask;
- if (mask != def_umask)
- umask(mask);
- }
-
- /* 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);
+ /* 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)
- warning("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));
-
- /* Insert system-wide environment variables. */
- if (def_env_file)
- read_env_file(def_env_file, FALSE);
+ 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. */
- insert_env_vars(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);
- /* Close the password and group files and free up memory. */
- sudo_endpwent();
- sudo_endgrent();
-
- closefrom(def_closefrom + 1);
-
-#ifndef PROFILING
- if (ISSET(sudo_mode, MODE_BACKGROUND) && fork() > 0)
- exit(0);
- else {
-#ifdef HAVE_SELINUX
- if (is_selinux_enabled() > 0 && user_role != NULL)
- selinux_exec(user_role, user_type, NewArgv,
- ISSET(sudo_mode, MODE_LOGIN_SHELL));
-#endif
- execv(safe_cmnd, NewArgv);
+ 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));
}
-#else
- exit(0);
-#endif /* PROFILING */
- /*
- * If we got here then execve() failed...
- */
- if (errno == ENOEXEC) {
- NewArgv--; /* at least one extra slot... */
- NewArgv[0] = "sh";
- NewArgv[1] = safe_cmnd;
- execv(_PATH_BSHELL, NewArgv);
- } warning("unable to execute %s", safe_cmnd);
- exit(127);
} else if (ISSET(validated, FLAG_NO_USER | FLAG_NO_HOST)) {
+ audit_failure(NewArgv, "No user or host");
log_denial(validated, 1);
exit(1);
} else {
/* Just tell the user they are not allowed to run foo. */
log_denial(validated, 1);
}
+ audit_failure(NewArgv, "validation failure");
exit(1);
}
exit(0); /* not reached */
* load the ``interfaces'' array.
*/
static void
-init_vars(sudo_mode, envp)
- int sudo_mode;
+init_vars(envp)
char **envp;
{
char *p, **ep, thost[MAXHOSTNAMELEN + 1];
* "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;
* 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))
+ 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 = estrdup(sudo_user.pw->pw_shell);
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");
av[0] = user_shell; /* may be updated later */
if (NewArgc > 0) {
- size_t size;
- char *cmnd, *src, *dst, *end;
- size = (size_t) (NewArgv[NewArgc - 1] - NewArgv[0]) +
- strlen(NewArgv[NewArgc - 1]) + 1;
- cmnd = emalloc(size);
- src = NewArgv[0];
- dst = cmnd;
- for (end = src + size - 1; src < end; src++, dst++)
- *dst = *src == 0 ? ' ' : *src;
+ 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;
int sudo_mode;
{
int rval;
+ char *path = user_path;
/* Set project if applicable. */
set_project(runas_pw);
user_stat = emalloc(sizeof(struct stat));
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);
}
}
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.
- * Sets NewArgc and NewArgv which corresponds to the argc/argv we'll use
- * for the command to be run (if we are running one).
+ * 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 mode = 0; /* what mode is sudo to be run in? */
- int flags = 0; /* mode flags */
- int ch;
-
- /* First, check to see if we were invoked as "sudoedit". */
- if (strcmp(getprogname(), "sudoedit") == 0)
- mode = MODE_EDIT;
-
- /* Returns true if the last option string was "--" */
-#define got_end_of_args (optind > 1 && argv[optind - 1][0] == '-' && \
- argv[optind - 1][1] == '-' && argv[optind - 1][2] == '\0')
-
- /* Returns true if next option is an environment variable */
-#define is_envar (optind < argc && argv[optind][0] != '/' && \
- strchr(argv[optind], '=') != NULL)
+ int rval = FALSE;
- for (;;) {
- /*
- * We disable arg permutation for GNU getopt().
- * Some trickiness is required to allow environment variables
- * to be interspersed with command line options.
- */
- if ((ch = getopt(argc, argv, "+Aa:bC:c:Eeg:HhiKkLlnPp:r:Sst:U:u:Vv")) != -1) {
- switch (ch) {
- case 'A':
- SET(tgetpass_flags, TGP_ASKPASS);
- break;
-#ifdef HAVE_BSD_AUTH_H
- case 'a':
- login_style = optarg;
- break;
-#endif
- case 'b':
- SET(flags, MODE_BACKGROUND);
- break;
- case 'C':
- if ((user_closefrom = atoi(optarg)) < 3) {
- warningx("the argument to -C must be at least 3");
- usage(1);
- }
- break;
-#ifdef HAVE_LOGIN_CAP_H
- case 'c':
- login_class = optarg;
- def_use_loginclass = TRUE;
- break;
-#endif
- case 'E':
- SET(flags, MODE_PRESERVE_ENV);
- break;
- case 'e':
- if (mode && mode != MODE_EDIT)
- usage_excl(1);
- mode = MODE_EDIT;
- break;
- case 'g':
- runas_group = optarg;
- break;
- case 'H':
- SET(flags, MODE_RESET_HOME);
- break;
- case 'h':
- if (mode && mode != MODE_HELP)
- usage_excl(1);
- mode = MODE_HELP;
- break;
- case 'i':
- SET(flags, MODE_LOGIN_SHELL);
- def_env_reset = TRUE;
- break;
- case 'k':
- if (mode && mode != MODE_INVALIDATE)
- usage_excl(1);
- mode = MODE_INVALIDATE;
- break;
- case 'K':
- if (mode && mode != MODE_KILL)
- usage_excl(1);
- mode = MODE_KILL;
- break;
- case 'L':
- if (mode && mode != MODE_LISTDEFS)
- usage_excl(1);
- mode = MODE_LISTDEFS;
- break;
- case 'l':
- if (mode) {
- if (mode == MODE_LIST)
- long_list = 1;
- else
- usage_excl(1);
- }
- mode = MODE_LIST;
- break;
- case 'n':
- SET(flags, MODE_NONINTERACTIVE);
- break;
- case 'P':
- SET(flags, MODE_PRESERVE_GROUPS);
- break;
- case 'p':
- user_prompt = optarg;
- def_passprompt_override = TRUE;
- break;
#ifdef HAVE_SELINUX
- case 'r':
- user_role = optarg;
- break;
- case 't':
- user_type = optarg;
- break;
+ if (rbac_enabled) {
+ if (selinux_setup(user_role, user_type, ttyname, ttyfd) == -1)
+ goto done;
+ }
#endif
- case 'S':
- SET(tgetpass_flags, TGP_STDIN);
- break;
- case 's':
- SET(flags, MODE_SHELL);
- break;
- case 'U':
- if ((list_pw = sudo_getpwnam(optarg)) == NULL)
- errorx(1, "unknown user: %s", optarg);
- break;
- case 'u':
- runas_user = optarg;
- break;
- case 'v':
- if (mode && mode != MODE_VALIDATE)
- usage_excl(1);
- mode = MODE_VALIDATE;
- break;
- case 'V':
- if (mode && mode != MODE_VERSION)
- usage_excl(1);
- mode = MODE_VERSION;
- break;
- default:
- usage(1);
- }
- } else if (!got_end_of_args && is_envar) {
- struct list_member *ev;
- /* Store environment variable. */
- ev = emalloc(sizeof(*ev));
- ev->value = argv[optind];
- ev->next = sudo_user.env_vars;
- sudo_user.env_vars = ev;
+ /* Close the password and group files and free up memory. */
+ sudo_endpwent();
+ sudo_endgrent();
+
+ /*
+ * 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;
+ }
- /* Crank optind and resume getopt. */
- optind++;
+ /*
+ * 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 option or an environment variable -- we're done. */
- break;
+ mode_t mask = umask(def_umask);
+ mask |= def_umask;
+ if (mask != def_umask)
+ umask(mask);
}
}
- NewArgc = argc - optind;
- NewArgv = argv + optind;
-
- if (!mode)
- mode = MODE_RUN;
+ /* Restore coredumpsize resource limit. */
+#if defined(RLIMIT_CORE) && !defined(SUDO_DEVEL)
+ (void) setrlimit(RLIMIT_CORE, &corelimit);
+#endif /* RLIMIT_CORE && !SUDO_DEVEL */
- if (NewArgc > 0 && mode == MODE_LIST)
- mode = MODE_CHECK;
+ if (ISSET(sudo_mode, MODE_RUN))
+ set_perms(PERM_FULL_RUNAS);
- if (ISSET(flags, MODE_LOGIN_SHELL)) {
- if (ISSET(flags, MODE_SHELL)) {
- warningx("you may not specify both the `-i' and `-s' options");
- usage(1);
- }
- if (ISSET(flags, MODE_PRESERVE_ENV)) {
- warningx("you may not specify both the `-i' and `-E' options");
- usage(1);
+ 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;
}
- SET(flags, MODE_SHELL);
- }
- if (mode == MODE_EDIT &&
- (ISSET(flags, MODE_PRESERVE_ENV) || sudo_user.env_vars != NULL)) {
- if (ISSET(mode, MODE_PRESERVE_ENV))
- warningx("the `-E' option is not valid in edit mode");
- if (sudo_user.env_vars != NULL)
- warningx("you may not specify environment variables in edit mode");
- usage(1);
- }
- if ((runas_user != NULL || runas_group != NULL) &&
- !ISSET(mode, MODE_EDIT | MODE_RUN | MODE_CHECK)) {
- usage(1);
}
- if (list_pw != NULL && mode != MODE_LIST && mode != MODE_CHECK) {
- warningx("the `-U' option may only be used with the `-l' option");
- usage(1);
- }
- if (ISSET(tgetpass_flags, TGP_STDIN) && ISSET(tgetpass_flags, TGP_ASKPASS)) {
- warningx("the `-A' and `-S' options may not be used together");
- 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 && mode == MODE_EDIT) ||
- (NewArgc > 0 && !ISSET(mode, MODE_RUN | MODE_EDIT | MODE_CHECK)))
- usage(1);
- if (NewArgc == 0 && mode == MODE_RUN && !ISSET(flags, MODE_SHELL))
- SET(flags, (MODE_IMPLIED_SHELL | MODE_SHELL));
+#endif
+
+ rval = TRUE;
- return(mode | flags);
+done:
+ return(rval);
+}
+
+/*
+ * Run the command and wait for it to complete.
+ */
+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);
}
/*
* Returns a handle to the sudoers file or NULL on error.
*/
FILE *
-open_sudoers(sudoers, keepopen)
+open_sudoers(sudoers, doedit, keepopen)
const char *sudoers;
+ int doedit;
int *keepopen;
{
struct stat statbuf;
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, "can't open %s", sudoers);
- else if (statbuf.st_size != 0) {
+ 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.
+ * user with a reasonable error message (unlike the lexer).
*/
- if (fgetc(fp) == EOF)
- log_error(USE_ERRNO, "can't read %s", sudoers);
+ 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);
}
- (void) fcntl(fileno(fp), F_SETFD, 1);
set_perms(PERM_ROOT); /* change back to root */
return(fp);
* 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)) {
- if (getrlimit(RLIMIT_NPROC, &rl) == 0) {
- rl.rlim_cur = rl.rlim_max;
- (void)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)
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 > STDERR_FILENO)
- close(devnull);
- }
+ 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);
}
}
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)
+ if ((runas_pw = sudo_getpwnam(user)) == NULL) {
+ audit_failure(NewArgv, "unknown user: %s", user);
log_error(NO_MAIL|MSG_ONLY, "unknown user: %s", user);
+ }
}
}
tq_foreach_fwd(snl, nss)
nss->close(nss);
}
+#ifdef USING_NONUNIX_GROUPS
+ sudo_nonunix_groupcheck_cleanup();
+#endif
sudo_endpwent();
sudo_endgrent();
+#ifdef _PATH_SUDO_IO_LOGDIR
+ io_log_close();
+#endif
}
+ term_restore(STDIN_FILENO, 0);
+#ifdef HAVE_SELINUX
+ selinux_restore_tty();
+#endif
}
static void
show_version()
{
- (void) printf("Sudo version %s\n", 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
exit(0);
}
-/*
- * Tell which options are mutually exclusive and exit.
- */
+#ifdef USE_ADMIN_FLAG
static void
-usage_excl(exit_val)
- int exit_val;
+create_admin_success_flag()
{
- warningx("Only one of the -e, -h, -i, -k, -K, -l, -s, -v or -V options may be specified");
- usage(exit_val);
-}
+ struct stat statbuf;
+ char flagfile[PATH_MAX];
+ int fd, n;
-/*
- * Give usage message and exit.
- * The actual usage strings are in sudo_usage.h for configure substitution.
- */
-static void
-usage(exit_val)
- int exit_val;
-{
- struct lbuf lbuf;
- char *uvec[5];
- int i, ulen;
+ /* Check whether the user is in the admin group. */
+ if (!user_in_group(sudo_user.pw, "admin"))
+ return;
- /*
- * Use usage vectors appropriate to the progname.
- */
- if (strcmp(getprogname(), "sudoedit") == 0) {
- uvec[0] = SUDO_USAGE4 + 3;
- uvec[1] = NULL;
- } else {
- uvec[0] = SUDO_USAGE1;
- uvec[1] = SUDO_USAGE2;
- uvec[2] = SUDO_USAGE3;
- uvec[3] = SUDO_USAGE4;
- uvec[4] = NULL;
- }
+ /* Build path to flag file. */
+ n = snprintf(flagfile, sizeof(flagfile), "%s/.sudo_as_admin_successful",
+ user_dir);
+ if (n <= 0 || n >= sizeof(flagfile))
+ return;
- /*
- * Print usage and wrap lines as needed, depending on the
- * tty width.
- */
- ulen = (int)strlen(getprogname()) + 8;
- lbuf_init(&lbuf, NULL, ulen, 0);
- for (i = 0; uvec[i] != NULL; i++) {
- lbuf_append(&lbuf, "usage: ", getprogname(), uvec[i], NULL);
- lbuf_print(&lbuf);
+ /* Create admin flag file if it doesn't already exist. */
+ set_perms(PERM_USER);
+ if (stat(flagfile, &statbuf) == 0) {
+ set_perms(PERM_ROOT);
+ return;
}
- lbuf_destroy(&lbuf);
- 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