#ifdef __TANDEM
# include <floss.h>
#endif
#include <config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <unistd.h>
#ifdef HAVE_NL_LANGINFO
# include <langinfo.h>
#endif
#include <netdb.h>
#include <pwd.h>
#include <grp.h>
#include <signal.h>
#include <time.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <syslog.h>
#include "sudoers.h"
#ifndef HAVE_GETADDRINFO
# include "compat/getaddrinfo.h"
#endif
#define INCORRECT_PASSWORD_ATTEMPT ((char *)0x01)
static void do_syslog(int, char *);
static bool do_logfile(const char *);
static bool send_mail(const char *fmt, ...);
static bool should_mail(int);
static void mysyslog(int, const char *, ...);
static char *new_logline(const char *, const char *);
#define MAXSYSLOGTRIES 16
static void
mysyslog(int pri, const char *fmt, ...)
{
const int flags = def_syslog_pid ? LOG_PID : 0;
va_list ap;
debug_decl(mysyslog, SUDOERS_DEBUG_LOGGING)
openlog("sudo", flags, def_syslog);
va_start(ap, fmt);
vsyslog(pri, fmt, ap);
va_end(ap);
closelog();
debug_return;
}
static void
do_syslog(int pri, char *msg)
{
size_t len, maxlen;
char *p, *tmp, save;
const char *fmt;
int oldlocale;
debug_decl(do_syslog, SUDOERS_DEBUG_LOGGING)
if (pri == -1)
debug_return;
sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, &oldlocale);
fmt = _("%8s : %s");
maxlen = def_syslog_maxlen - (strlen(fmt) - 5 + strlen(user_name));
for (p = msg; *p != '\0'; ) {
len = strlen(p);
if (len > maxlen) {
tmp = memrchr(p, ' ', maxlen);
if (tmp == NULL)
tmp = p + maxlen;
save = *tmp;
*tmp = '\0';
mysyslog(pri, fmt, user_name, p);
*tmp = save;
for (p = tmp; *p == ' '; p++)
continue;
} else {
mysyslog(pri, fmt, user_name, p);
p += len;
}
fmt = _("%8s : (command continued) %s");
maxlen = def_syslog_maxlen - (strlen(fmt) - 5 + strlen(user_name));
}
sudoers_setlocale(oldlocale, NULL);
debug_return;
}
static bool
do_logfile(const char *msg)
{
static bool warned = false;
const char *timestr;
int len, oldlocale;
bool ret = false;
char *full_line;
mode_t oldmask;
FILE *fp;
debug_decl(do_logfile, SUDOERS_DEBUG_LOGGING)
sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, &oldlocale);
oldmask = umask(S_IRWXG|S_IRWXO);
fp = fopen(def_logfile, "a");
(void) umask(oldmask);
if (fp == NULL) {
if (!warned) {
log_warning(SLOG_SEND_MAIL|SLOG_NO_LOG,
N_("unable to open log file: %s"), def_logfile);
warned = true;
}
goto done;
}
if (!sudo_lock_file(fileno(fp), SUDO_LOCK)) {
if (!warned) {
log_warning(SLOG_SEND_MAIL|SLOG_NO_LOG,
N_("unable to lock log file: %s"), def_logfile);
warned = true;
}
goto done;
}
timestr = get_timestr(time(NULL), def_log_year);
if (timestr == NULL)
timestr = "invalid date";
if (def_log_host) {
len = asprintf(&full_line, "%s : %s : HOST=%s : %s",
timestr, user_name, user_srunhost, msg);
} else {
len = asprintf(&full_line, "%s : %s : %s",
timestr, user_name, msg);
}
if (len == -1) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
goto done;
}
if ((size_t)def_loglinelen < sizeof(LOG_INDENT)) {
(void) fputs(full_line, fp);
(void) fputc('\n', fp);
} else {
writeln_wrap(fp, full_line, len, def_loglinelen);
}
free(full_line);
(void) fflush(fp);
if (ferror(fp)) {
if (!warned) {
log_warning(SLOG_SEND_MAIL|SLOG_NO_LOG,
N_("unable to write log file: %s"), def_logfile);
warned = true;
}
goto done;
}
ret = true;
done:
if (fp != NULL)
(void) fclose(fp);
sudoers_setlocale(oldlocale, NULL);
debug_return_bool(ret);
}
bool
log_denial(int status, bool inform_user)
{
const char *message;
char *logline;
int oldlocale;
bool uid_changed, ret = true;
bool mailit;
debug_decl(log_denial, SUDOERS_DEBUG_LOGGING)
if (ISSET(status, FLAG_NO_USER | FLAG_NO_HOST))
audit_failure(NewArgc, NewArgv, N_("No user or host"));
else
audit_failure(NewArgc, NewArgv, N_("validation failure"));
mailit = should_mail(status);
if (def_log_denied || mailit) {
sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, &oldlocale);
if (ISSET(status, FLAG_NO_USER))
message = _("user NOT in sudoers");
else if (ISSET(status, FLAG_NO_HOST))
message = _("user NOT authorized on host");
else
message = _("command not allowed");
logline = new_logline(message, NULL);
if (logline == NULL)
debug_return_bool(false);
uid_changed = set_perms(PERM_ROOT);
if (mailit)
send_mail("%s", logline);
if (def_log_denied) {
if (def_syslog)
do_syslog(def_syslog_badpri, logline);
if (def_logfile && !do_logfile(logline))
ret = false;
}
if (uid_changed) {
if (!restore_perms())
ret = false;
}
free(logline);
sudoers_setlocale(oldlocale, NULL);
}
if (inform_user) {
sudoers_setlocale(SUDOERS_LOCALE_USER, &oldlocale);
if (ISSET(status, FLAG_NO_USER)) {
sudo_printf(SUDO_CONV_ERROR_MSG, _("%s is not in the sudoers "
"file. This incident will be reported.\n"), user_name);
} else if (ISSET(status, FLAG_NO_HOST)) {
sudo_printf(SUDO_CONV_ERROR_MSG, _("%s is not allowed to run sudo "
"on %s. This incident will be reported.\n"),
user_name, user_srunhost);
} else if (ISSET(status, FLAG_NO_CHECK)) {
sudo_printf(SUDO_CONV_ERROR_MSG, _("Sorry, user %s may not run "
"sudo on %s.\n"), user_name, user_srunhost);
} else {
sudo_printf(SUDO_CONV_ERROR_MSG, _("Sorry, user %s is not allowed "
"to execute '%s%s%s' as %s%s%s on %s.\n"),
user_name, user_cmnd, user_args ? " " : "",
user_args ? user_args : "",
list_pw ? list_pw->pw_name : runas_pw ?
runas_pw->pw_name : user_name, runas_gr ? ":" : "",
runas_gr ? runas_gr->gr_name : "", user_host);
}
sudoers_setlocale(oldlocale, NULL);
}
debug_return_bool(ret);
}
bool
log_failure(int status, int flags)
{
bool ret, inform_user = true;
debug_decl(log_failure, SUDOERS_DEBUG_LOGGING)
if (!ISSET(status, FLAG_NO_USER | FLAG_NO_HOST) && def_path_info &&
(flags == NOT_FOUND_DOT || flags == NOT_FOUND))
inform_user = false;
ret = log_denial(status, inform_user);
if (!inform_user) {
if (flags == NOT_FOUND)
sudo_warnx(U_("%s: command not found"), user_cmnd);
else if (flags == NOT_FOUND_DOT)
sudo_warnx(U_("ignoring \"%s\" found in '.'\nUse \"sudo ./%s\" if this is the \"%s\" you wish to run."), user_cmnd, user_cmnd, user_cmnd);
}
debug_return_bool(ret);
}
bool
log_auth_failure(int status, unsigned int tries)
{
int flags = 0;
bool ret = true;
debug_decl(log_auth_failure, SUDOERS_DEBUG_LOGGING)
audit_failure(NewArgc, NewArgv, N_("authentication failure"));
if (ISSET(status, VALIDATE_SUCCESS)) {
if (def_mail_badpass || def_mail_always)
SET(flags, SLOG_SEND_MAIL);
} else {
if (def_mail_badpass && !should_mail(status))
SET(flags, SLOG_SEND_MAIL);
SET(flags, SLOG_NO_LOG);
}
if (ISSET(status, FLAG_BAD_PASSWORD))
ret = log_warningx(flags, INCORRECT_PASSWORD_ATTEMPT, tries);
else if (ISSET(status, FLAG_NON_INTERACTIVE))
ret = log_warningx(flags, N_("a password is required"));
debug_return_bool(ret);
}
bool
log_allowed(int status)
{
char *logline;
int oldlocale;
bool uid_changed, ret = true;
bool mailit;
debug_decl(log_allowed, SUDOERS_DEBUG_LOGGING)
mailit = should_mail(status);
if (def_log_allowed || mailit) {
sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, &oldlocale);
if ((logline = new_logline(NULL, NULL)) == NULL)
debug_return_bool(false);
uid_changed = set_perms(PERM_ROOT);
if (mailit)
send_mail("%s", logline);
if (def_log_allowed) {
if (def_syslog)
do_syslog(def_syslog_goodpri, logline);
if (def_logfile && !do_logfile(logline))
ret = false;
}
if (uid_changed) {
if (!restore_perms())
ret = false;
}
free(logline);
sudoers_setlocale(oldlocale, NULL);
}
debug_return_bool(ret);
}
static int
fmt_authfail_message(char **str, va_list ap)
{
unsigned int tries = va_arg(ap, unsigned int);
char *src, *dst0, *dst, *dst_end;
size_t size;
int len;
debug_decl(fmt_authfail_message, SUDOERS_DEBUG_LOGGING)
if (def_authfail_message == NULL) {
debug_return_int(asprintf(str, ngettext("%u incorrect password attempt",
"%u incorrect password attempts", tries), tries));
}
src = def_authfail_message;
size = strlen(src) + 33;
if ((dst0 = dst = malloc(size)) == NULL)
debug_return_int(-1);
dst_end = dst + size;
while (*src != '\0' && dst + 1 < dst_end) {
if (src[0] == '%') {
switch (src[1]) {
case '%':
src++;
break;
case 'd':
len = snprintf(dst, dst_end - dst, "%u", tries);
if (len < 0 || len >= (int)(dst_end - dst))
goto done;
dst += len;
src += 2;
continue;
default:
break;
}
}
*dst++ = *src++;
}
done:
*dst = '\0';
*str = dst0;
#ifdef __clang_analyzer__
if (__builtin_expect(dst < dst0, 0))
__builtin_trap();
#endif
debug_return_int(dst - dst0);
}
static bool
vlog_warning(int flags, int errnum, const char *fmt, va_list ap)
{
int oldlocale;
const char *errstr = NULL;
char *logline, *message;
bool uid_changed, ret = true;
va_list ap2;
int len;
debug_decl(vlog_warning, SUDOERS_DEBUG_LOGGING)
va_copy(ap2, ap);
sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, &oldlocale);
if (fmt == INCORRECT_PASSWORD_ATTEMPT) {
len = fmt_authfail_message(&message, ap);
} else {
len = vasprintf(&message, _(fmt), ap);
}
if (len == -1) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
ret = false;
goto done;
}
if (ISSET(flags, SLOG_USE_ERRNO))
errstr = strerror(errnum);
else if (ISSET(flags, SLOG_GAI_ERRNO))
errstr = gai_strerror(errnum);
if (errstr != NULL) {
sudo_debug_printf2(NULL, NULL, 0,
SUDO_DEBUG_WARN|sudo_debug_subsys, "%s: %s", message, errstr);
} else {
sudo_debug_printf2(NULL, NULL, 0,
SUDO_DEBUG_WARN|sudo_debug_subsys, "%s", message);
}
if (ISSET(flags, SLOG_RAW_MSG)) {
logline = message;
} else {
logline = new_logline(message, errstr);
free(message);
if (logline == NULL) {
ret = false;
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
goto done;
}
}
uid_changed = set_perms(PERM_ROOT);
if (ISSET(flags, SLOG_SEND_MAIL))
send_mail("%s", logline);
if (!ISSET(flags, SLOG_NO_LOG)) {
if (def_syslog)
do_syslog(def_syslog_badpri, logline);
if (def_logfile && !do_logfile(logline))
ret = false;
}
if (uid_changed) {
if (!restore_perms())
ret = false;
}
free(logline);
if (!ISSET(flags, SLOG_NO_STDERR)) {
sudoers_setlocale(SUDOERS_LOCALE_USER, NULL);
if (fmt == INCORRECT_PASSWORD_ATTEMPT) {
len = fmt_authfail_message(&message, ap2);
if (len == -1) {
sudo_warnx(U_("%s: %s"), __func__,
U_("unable to allocate memory"));
ret = false;
goto done;
}
sudo_warnx_nodebug("%s", message);
free(message);
} else {
if (ISSET(flags, SLOG_USE_ERRNO)) {
errno = errnum;
sudo_vwarn_nodebug(_(fmt), ap2);
} else if (ISSET(flags, SLOG_GAI_ERRNO)) {
sudo_gai_vwarn_nodebug(errnum, _(fmt), ap2);
} else
sudo_vwarnx_nodebug(_(fmt), ap2);
}
}
done:
va_end(ap2);
sudoers_setlocale(oldlocale, NULL);
debug_return_bool(ret);
}
bool
log_warning(int flags, const char *fmt, ...)
{
va_list ap;
bool ret;
debug_decl(log_warning, SUDOERS_DEBUG_LOGGING)
va_start(ap, fmt);
ret = vlog_warning(flags|SLOG_USE_ERRNO, errno, fmt, ap);
va_end(ap);
debug_return_bool(ret);
}
bool
log_warningx(int flags, const char *fmt, ...)
{
va_list ap;
bool ret;
debug_decl(log_warningx, SUDOERS_DEBUG_LOGGING)
va_start(ap, fmt);
ret = vlog_warning(flags, 0, fmt, ap);
va_end(ap);
debug_return_bool(ret);
}
bool
gai_log_warning(int flags, int errnum, const char *fmt, ...)
{
va_list ap;
bool ret;
debug_decl(gai_log_warning, SUDOERS_DEBUG_LOGGING)
va_start(ap, fmt);
ret = vlog_warning(flags|SLOG_GAI_ERRNO, errnum, fmt, ap);
va_end(ap);
debug_return_bool(ret);
}
static void
closefrom_nodebug(int lowfd)
{
unsigned char *debug_fds;
int fd, startfd;
debug_decl(closefrom_nodebug, SUDOERS_DEBUG_LOGGING)
startfd = sudo_debug_get_fds(&debug_fds) + 1;
if (lowfd > startfd)
startfd = lowfd;
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"closing fds >= %d", startfd);
closefrom(startfd);
for (fd = lowfd; fd < startfd; fd++) {
if (sudo_isset(debug_fds, fd))
continue;
sudo_debug_printf(SUDO_DEBUG_DEBUG|SUDO_DEBUG_LINENO,
"closing fd %d", fd);
#ifdef __APPLE__
(void) fcntl(fd, F_SETFD, FD_CLOEXEC);
#else
(void) close(fd);
#endif
}
debug_return;
}
#define MAX_MAILFLAGS 63
static void __attribute__((__noreturn__))
exec_mailer(int *pfd)
{
char *last, *p, *argv[MAX_MAILFLAGS + 1];
char *mflags, *mpath = def_mailerpath;
int i;
#ifdef NO_ROOT_MAILER
int perm = PERM_FULL_USER;
#else
int perm = PERM_ROOT;
static char *envp[] = {
"HOME=/",
"PATH=/usr/bin:/bin:/usr/sbin:/sbin",
"LOGNAME=root",
"USER=root",
# ifdef _AIX
"LOGIN=root",
# endif
NULL
};
#endif
debug_decl(exec_mailer, SUDOERS_DEBUG_LOGGING)
if (pfd[0] != STDIN_FILENO) {
if (dup2(pfd[0], STDIN_FILENO) == -1) {
mysyslog(LOG_ERR, _("unable to dup stdin: %m"));
sudo_debug_printf(SUDO_DEBUG_ERROR,
"unable to dup stdin: %s", strerror(errno));
sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
_exit(127);
}
(void) close(pfd[0]);
}
(void) close(pfd[1]);
if ((mflags = strdup(def_mailerflags)) == NULL) {
mysyslog(LOG_ERR, _("unable to allocate memory"));
sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
_exit(127);
}
if ((argv[0] = strrchr(mpath, '/')))
argv[0]++;
else
argv[0] = mpath;
i = 1;
if ((p = strtok_r(mflags, " \t", &last))) {
do {
argv[i] = p;
} while (++i < MAX_MAILFLAGS && (p = strtok_r(NULL, " \t", &last)));
}
argv[i] = NULL;
(void) set_perms(perm);
sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
#ifdef NO_ROOT_MAILER
execv(mpath, argv);
#else
execve(mpath, argv, envp);
#endif
mysyslog(LOG_ERR, _("unable to execute %s: %m"), mpath);
sudo_debug_printf(SUDO_DEBUG_ERROR, "unable to execute %s: %s",
mpath, strerror(errno));
_exit(127);
}
static bool
send_mail(const char *fmt, ...)
{
FILE *mail;
char *p;
const char *timestr;
int fd, pfd[2], status;
pid_t pid, rv;
struct stat sb;
va_list ap;
debug_decl(send_mail, SUDOERS_DEBUG_LOGGING)
if (!def_mailerpath || !def_mailto)
debug_return_bool(true);
if (stat(def_mailerpath, &sb) != 0 || !S_ISREG(sb.st_mode))
debug_return_bool(false);
switch (pid = sudo_debug_fork()) {
case -1:
sudo_warn(U_("unable to fork"));
debug_return_bool(false);
break;
case 0:
switch (pid = fork()) {
case -1:
mysyslog(LOG_ERR, _("unable to fork: %m"));
sudo_debug_printf(SUDO_DEBUG_ERROR, "unable to fork: %s",
strerror(errno));
sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
_exit(1);
case 0:
sudo_debug_enter(__func__, __FILE__, __LINE__, sudo_debug_subsys);
break;
default:
_exit(0);
}
break;
default:
for (;;) {
rv = waitpid(pid, &status, 0);
if (rv == -1 && errno != EINTR)
break;
if (rv != -1 && !WIFSTOPPED(status))
break;
}
sudo_debug_printf(SUDO_DEBUG_INFO|SUDO_DEBUG_LINENO,
"child (%d) exit value %d", (int)rv, status);
debug_return_bool(true);
}
if (setsid() == -1)
sudo_warn("setsid");
if (chdir("/") == -1)
sudo_warn("chdir(/)");
fd = open(_PATH_DEVNULL, O_RDWR, S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
if (fd != -1) {
(void) dup2(fd, STDIN_FILENO);
(void) dup2(fd, STDOUT_FILENO);
(void) dup2(fd, STDERR_FILENO);
}
sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, NULL);
closefrom_nodebug(STDERR_FILENO + 1);
if (pipe(pfd) == -1) {
mysyslog(LOG_ERR, _("unable to open pipe: %m"));
sudo_debug_printf(SUDO_DEBUG_ERROR, "unable to open pipe: %s",
strerror(errno));
sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
_exit(1);
}
switch (pid = sudo_debug_fork()) {
case -1:
mysyslog(LOG_ERR, _("unable to fork: %m"));
sudo_debug_printf(SUDO_DEBUG_ERROR, "unable to fork: %s",
strerror(errno));
sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
_exit(1);
break;
case 0:
exec_mailer(pfd);
}
(void) close(pfd[0]);
mail = fdopen(pfd[1], "w");
(void) fprintf(mail, "To: %s\nFrom: %s\nAuto-Submitted: %s\nSubject: ",
def_mailto, def_mailfrom ? def_mailfrom : user_name, "auto-generated");
for (p = _(def_mailsub); *p; p++) {
if (*p == '%' && *(p+1) != '%') {
switch (*(++p)) {
case 'h':
(void) fputs(user_host, mail);
break;
case 'u':
(void) fputs(user_name, mail);
break;
default:
p--;
break;
}
} else
(void) fputc(*p, mail);
}
#ifdef HAVE_NL_LANGINFO
if (strcmp(def_sudoers_locale, "C") != 0)
(void) fprintf(mail, "\nContent-Type: text/plain; charset=\"%s\"\nContent-Transfer-Encoding: 8bit", nl_langinfo(CODESET));
#endif
if ((timestr = get_timestr(time(NULL), def_log_year)) == NULL)
timestr = "invalid date";
(void) fprintf(mail, "\n\n%s : %s : %s : ", user_host, timestr, user_name);
va_start(ap, fmt);
(void) vfprintf(mail, fmt, ap);
va_end(ap);
fputs("\n\n", mail);
fclose(mail);
for (;;) {
rv = waitpid(pid, &status, 0);
if (rv == -1 && errno != EINTR)
break;
if (rv != -1 && !WIFSTOPPED(status))
break;
}
sudo_debug_printf(SUDO_DEBUG_INFO|SUDO_DEBUG_LINENO,
"child (%d) exit value %d", (int)rv, status);
sudo_debug_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
_exit(0);
}
static bool
should_mail(int status)
{
debug_decl(should_mail, SUDOERS_DEBUG_LOGGING)
debug_return_bool(def_mail_always || ISSET(status, VALIDATE_ERROR) ||
(def_mail_all_cmnds && ISSET(sudo_mode, (MODE_RUN|MODE_EDIT))) ||
(def_mail_no_user && ISSET(status, FLAG_NO_USER)) ||
(def_mail_no_host && ISSET(status, FLAG_NO_HOST)) ||
(def_mail_no_perms && !ISSET(status, VALIDATE_SUCCESS)));
}
#define LL_TTY_STR "TTY="
#define LL_CWD_STR "PWD="
#define LL_USER_STR "USER="
#define LL_GROUP_STR "GROUP="
#define LL_ENV_STR "ENV="
#define LL_CMND_STR "COMMAND="
#define LL_TSID_STR "TSID="
#define IS_SESSID(s) ( \
isalnum((unsigned char)(s)[0]) && isalnum((unsigned char)(s)[1]) && \
(s)[2] == '/' && \
isalnum((unsigned char)(s)[3]) && isalnum((unsigned char)(s)[4]) && \
(s)[5] == '/' && \
isalnum((unsigned char)(s)[6]) && isalnum((unsigned char)(s)[7]) && \
(s)[8] == '\0')
static char *
new_logline(const char *message, const char *errstr)
{
char *line = NULL, *evstr = NULL;
#ifndef SUDOERS_NO_SEQ
char sessid[7];
#endif
const char *tsid = NULL;
size_t len = 0;
debug_decl(new_logline, SUDOERS_DEBUG_LOGGING)
#ifndef SUDOERS_NO_SEQ
if (sudo_user.iolog_file != NULL) {
if (IS_SESSID(sudo_user.iolog_file)) {
sessid[0] = sudo_user.iolog_file[0];
sessid[1] = sudo_user.iolog_file[1];
sessid[2] = sudo_user.iolog_file[3];
sessid[3] = sudo_user.iolog_file[4];
sessid[4] = sudo_user.iolog_file[6];
sessid[5] = sudo_user.iolog_file[7];
sessid[6] = '\0';
tsid = sessid;
} else {
tsid = sudo_user.iolog_file;
}
}
#endif
if (message != NULL)
len += strlen(message) + 3;
if (errstr != NULL)
len += strlen(errstr) + 3;
len += sizeof(LL_TTY_STR) + 2 + strlen(user_tty);
len += sizeof(LL_CWD_STR) + 2 + strlen(user_cwd);
if (runas_pw != NULL)
len += sizeof(LL_USER_STR) + 2 + strlen(runas_pw->pw_name);
if (runas_gr != NULL)
len += sizeof(LL_GROUP_STR) + 2 + strlen(runas_gr->gr_name);
if (tsid != NULL)
len += sizeof(LL_TSID_STR) + 2 + strlen(tsid);
if (sudo_user.env_vars != NULL) {
size_t evlen = 0;
char * const *ep;
for (ep = sudo_user.env_vars; *ep != NULL; ep++)
evlen += strlen(*ep) + 1;
if (evlen != 0) {
if ((evstr = malloc(evlen)) == NULL)
goto oom;
evstr[0] = '\0';
for (ep = sudo_user.env_vars; *ep != NULL; ep++) {
strlcat(evstr, *ep, evlen);
strlcat(evstr, " ", evlen);
}
len += sizeof(LL_ENV_STR) + 2 + evlen;
}
}
if (user_cmnd != NULL) {
len += sizeof(LL_CMND_STR) - 1 + strlen(user_cmnd);
if (ISSET(sudo_mode, MODE_CHECK))
len += sizeof("list ") - 1;
if (user_args != NULL)
len += strlen(user_args) + 1;
}
if ((line = malloc(++len)) == NULL)
goto oom;
line[0] = '\0';
if (message != NULL) {
if (strlcat(line, message, len) >= len ||
strlcat(line, errstr ? " : " : " ; ", len) >= len)
goto toobig;
}
if (errstr != NULL) {
if (strlcat(line, errstr, len) >= len ||
strlcat(line, " ; ", len) >= len)
goto toobig;
}
if (strlcat(line, LL_TTY_STR, len) >= len ||
strlcat(line, user_tty, len) >= len ||
strlcat(line, " ; ", len) >= len)
goto toobig;
if (strlcat(line, LL_CWD_STR, len) >= len ||
strlcat(line, user_cwd, len) >= len ||
strlcat(line, " ; ", len) >= len)
goto toobig;
if (runas_pw != NULL) {
if (strlcat(line, LL_USER_STR, len) >= len ||
strlcat(line, runas_pw->pw_name, len) >= len ||
strlcat(line, " ; ", len) >= len)
goto toobig;
}
if (runas_gr != NULL) {
if (strlcat(line, LL_GROUP_STR, len) >= len ||
strlcat(line, runas_gr->gr_name, len) >= len ||
strlcat(line, " ; ", len) >= len)
goto toobig;
}
if (tsid != NULL) {
if (strlcat(line, LL_TSID_STR, len) >= len ||
strlcat(line, tsid, len) >= len ||
strlcat(line, " ; ", len) >= len)
goto toobig;
}
if (evstr != NULL) {
if (strlcat(line, LL_ENV_STR, len) >= len ||
strlcat(line, evstr, len) >= len ||
strlcat(line, " ; ", len) >= len)
goto toobig;
free(evstr);
evstr = NULL;
}
if (user_cmnd != NULL) {
if (strlcat(line, LL_CMND_STR, len) >= len)
goto toobig;
if (ISSET(sudo_mode, MODE_CHECK) && strlcat(line, "list ", len) >= len)
goto toobig;
if (strlcat(line, user_cmnd, len) >= len)
goto toobig;
if (user_args != NULL) {
if (strlcat(line, " ", len) >= len ||
strlcat(line, user_args, len) >= len)
goto toobig;
}
}
debug_return_str(line);
oom:
free(evstr);
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
debug_return_str(NULL);
toobig:
free(evstr);
free(line);
sudo_warnx(U_("internal error, %s overflow"), __func__);
debug_return_str(NULL);
}