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-rw-r--r--plugins/sudoers/logging.c1044
1 files changed, 1044 insertions, 0 deletions
diff --git a/plugins/sudoers/logging.c b/plugins/sudoers/logging.c
new file mode 100644
index 0000000..9562609
--- /dev/null
+++ b/plugins/sudoers/logging.c
@@ -0,0 +1,1044 @@
+/*
+ * Copyright (c) 1994-1996, 1998-2018 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * Sponsored in part by the Defense Advanced Research Projects
+ * Agency (DARPA) and Air Force Research Laboratory, Air Force
+ * Materiel Command, USAF, under agreement number F39502-99-1-0512.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#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 /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#include <unistd.h>
+#ifdef HAVE_NL_LANGINFO
+# include <langinfo.h>
+#endif /* HAVE_NL_LANGINFO */
+#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
+
+/* Special message for log_warning() so we know to use ngettext() */
+#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 /* num of retries for broken syslogs */
+
+/*
+ * We do an openlog(3)/closelog(3) for each message because some
+ * authentication methods (notably PAM) use syslog(3) for their
+ * own nefarious purposes and may call openlog(3) and closelog(3).
+ */
+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;
+}
+
+/*
+ * Log a message to syslog, pre-pending the username and splitting the
+ * message into parts if it is longer than syslog_maxlen.
+ */
+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)
+
+ /* A priority of -1 corresponds to "none". */
+ if (pri == -1)
+ debug_return;
+
+ sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, &oldlocale);
+
+ /*
+ * Log the full line, breaking into multiple syslog(3) calls if necessary
+ */
+ fmt = _("%8s : %s");
+ maxlen = def_syslog_maxlen - (strlen(fmt) - 5 + strlen(user_name));
+ for (p = msg; *p != '\0'; ) {
+ len = strlen(p);
+ if (len > maxlen) {
+ /*
+ * Break up the line into what will fit on one syslog(3) line
+ * Try to avoid breaking words into several lines if possible.
+ */
+ tmp = memrchr(p, ' ', maxlen);
+ if (tmp == NULL)
+ tmp = p + maxlen;
+
+ /* NULL terminate line, but save the char to restore later */
+ save = *tmp;
+ *tmp = '\0';
+
+ mysyslog(pri, fmt, user_name, p);
+
+ *tmp = save; /* restore saved character */
+
+ /* Advance p and eliminate leading whitespace */
+ 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)) {
+ /* Don't pretty-print long log file lines (hard to grep). */
+ (void) fputs(full_line, fp);
+ (void) fputc('\n', fp);
+ } else {
+ /* Write line with word wrap around def_loglinelen chars. */
+ 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);
+}
+
+/*
+ * Log, audit and mail the denial message, optionally informing the user.
+ */
+bool
+log_denial(int status, bool inform_user)
+{
+ const char *message;
+ char *logline;
+ int oldlocale;
+ bool uid_changed, ret = true;
+ debug_decl(log_denial, SUDOERS_DEBUG_LOGGING)
+
+ /* Handle auditing first (audit_failure() handles the locale itself). */
+ 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"));
+
+ /* Log and mail messages should be in the sudoers locale. */
+ sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, &oldlocale);
+
+ /* Set error message. */
+ 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);
+
+ /* Become root if we are not already. */
+ uid_changed = set_perms(PERM_ROOT);
+
+ if (should_mail(status))
+ send_mail("%s", logline); /* send mail based on status */
+
+ /*
+ * Log via syslog and/or a file.
+ */
+ 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; /* XXX - return -1 instead? */
+ }
+
+ free(logline);
+
+ /* Restore locale. */
+ sudoers_setlocale(oldlocale, NULL);
+
+ /* Inform the user if they failed to authenticate (in their locale). */
+ 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);
+}
+
+/*
+ * Log and audit that user was not allowed to run the command.
+ */
+bool
+log_failure(int status, int flags)
+{
+ bool ret, inform_user = true;
+ debug_decl(log_failure, SUDOERS_DEBUG_LOGGING)
+
+ /* The user doesn't always get to see the log message (path info). */
+ 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) {
+ /*
+ * We'd like to not leak path info at all here, but that can
+ * *really* confuse the users. To really close the leak we'd
+ * have to say "not allowed to run foo" even when the problem
+ * is just "no foo in path" since the user can trivially set
+ * their path to just contain a single dir.
+ */
+ 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);
+}
+
+/*
+ * Log and audit that user was not able to authenticate themselves.
+ */
+bool
+log_auth_failure(int status, unsigned int tries)
+{
+ int flags = 0;
+ bool ret = true;
+ debug_decl(log_auth_failure, SUDOERS_DEBUG_LOGGING)
+
+ /* Handle auditing first. */
+ audit_failure(NewArgc, NewArgv, N_("authentication failure"));
+
+ /*
+ * Do we need to send mail?
+ * We want to avoid sending multiple messages for the same command
+ * so if we are going to send an email about the denial, that takes
+ * precedence.
+ */
+ if (ISSET(status, VALIDATE_SUCCESS)) {
+ /* Command allowed, auth failed; do we need to send mail? */
+ if (def_mail_badpass || def_mail_always)
+ SET(flags, SLOG_SEND_MAIL);
+ } else {
+ /* Command denied, auth failed; make sure we don't send mail twice. */
+ if (def_mail_badpass && !should_mail(status))
+ SET(flags, SLOG_SEND_MAIL);
+ /* Don't log the bad password message, we'll log a denial instead. */
+ SET(flags, SLOG_NO_LOG);
+ }
+
+ /*
+ * If sudoers denied the command we'll log that separately.
+ */
+ 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);
+}
+
+/*
+ * Log and potentially mail the allowed command.
+ */
+bool
+log_allowed(int status)
+{
+ char *logline;
+ int oldlocale;
+ bool uid_changed, ret = true;
+ debug_decl(log_allowed, SUDOERS_DEBUG_LOGGING)
+
+ /* Log and mail messages should be in the sudoers locale. */
+ sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, &oldlocale);
+
+ if ((logline = new_logline(NULL, NULL)) == NULL)
+ debug_return_bool(false);
+
+ /* Become root if we are not already. */
+ uid_changed = set_perms(PERM_ROOT);
+
+ /* XXX - return value */
+ if (should_mail(status))
+ send_mail("%s", logline); /* send mail based on status */
+
+ /*
+ * Log via syslog and/or a file.
+ */
+ 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; /* XXX - return -1 instead? */
+ }
+
+ free(logline);
+
+ sudoers_setlocale(oldlocale, NULL);
+
+ debug_return_bool(ret);
+}
+
+/*
+ * Format an authentication failure message, using either
+ * authfail_message from sudoers or a locale-specific message.
+ */
+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;
+
+ /* Always leave space for the terminating NUL. */
+ 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 == -1 || len >= (int)(dst_end - dst))
+ goto done;
+ dst += len;
+ src += 2;
+ continue;
+ default:
+ break;
+ }
+ }
+ *dst++ = *src++;
+ }
+done:
+ *dst = '\0';
+
+ *str = dst0;
+#ifdef __clang_analyzer__
+ /* clang analyzer false positive */
+ if (__builtin_expect(dst < dst0, 0))
+ __builtin_trap();
+#endif
+ debug_return_int(dst - dst0);
+}
+
+/*
+ * Perform logging for log_warning()/log_warningx().
+ */
+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)
+
+ /* Need extra copy of ap for sudo_vwarn()/sudo_vwarnx() below. */
+ va_copy(ap2, ap);
+
+ /* Log messages should be in the sudoers locale. */
+ sudoers_setlocale(SUDOERS_LOCALE_SUDOERS, &oldlocale);
+
+ /* Expand printf-style format + args (with a special case). */
+ 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);
+
+ /* Log to debug file. */
+ 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;
+ }
+ }
+
+ /* Become root if we are not already. */
+ uid_changed = set_perms(PERM_ROOT);
+
+ /*
+ * Send a copy of the error via mail.
+ * XXX - return value
+ */
+ if (ISSET(flags, SLOG_SEND_MAIL))
+ send_mail("%s", logline);
+
+ /*
+ * Log to syslog and/or a file.
+ */
+ 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);
+
+ /*
+ * Tell the user (in their locale).
+ */
+ 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)
+
+ /* Log the error. */
+ 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)
+
+ /* Log the error. */
+ 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)
+
+ /* Log the error. */
+ va_start(ap, fmt);
+ ret = vlog_warning(flags|SLOG_GAI_ERRNO, errnum, fmt, ap);
+ va_end(ap);
+
+ debug_return_bool(ret);
+}
+
+
+#define MAX_MAILFLAGS 63
+
+/*
+ * Send a message to MAILTO user
+ */
+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;
+#ifndef NO_ROOT_MAILER
+ static char *root_envp[] = {
+ "HOME=/",
+ "PATH=/usr/bin:/bin:/usr/sbin:/sbin",
+ "LOGNAME=root",
+ "USER=root",
+# ifdef _AIX
+ "LOGIN=root",
+# endif
+ NULL
+ };
+#endif /* NO_ROOT_MAILER */
+ debug_decl(send_mail, SUDOERS_DEBUG_LOGGING)
+
+ /* If mailer is disabled just return. */
+ if (!def_mailerpath || !def_mailto)
+ debug_return_bool(true);
+
+ /* Make sure the mailer exists and is a regular file. */
+ if (stat(def_mailerpath, &sb) != 0 || !S_ISREG(sb.st_mode))
+ debug_return_bool(false);
+
+ /* Fork and return, child will daemonize. */
+ switch (pid = sudo_debug_fork()) {
+ case -1:
+ /* Error. */
+ sudo_warn(U_("unable to fork"));
+ debug_return_bool(false);
+ break;
+ case 0:
+ /* Child. */
+ switch (pid = fork()) {
+ case -1:
+ /* Error. */
+ mysyslog(LOG_ERR, _("unable to fork: %m"));
+ sudo_debug_printf(SUDO_DEBUG_ERROR, "unable to fork: %s",
+ strerror(errno));
+ _exit(1);
+ case 0:
+ /* Grandchild continues below. */
+ break;
+ default:
+ /* Parent will wait for us. */
+ _exit(0);
+ }
+ break;
+ default:
+ /* Parent. */
+ for (;;) {
+ rv = waitpid(pid, &status, 0);
+ if (rv == -1 && errno != EINTR)
+ break;
+ if (rv != -1 && !WIFSTOPPED(status))
+ break;
+ }
+ return true; /* not debug */
+ }
+
+ /* Daemonize - disassociate from session/tty. */
+ 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);
+
+ /* Close fds so we don't leak anything. */
+ closefrom(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:
+ /* Error. */
+ 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:
+ {
+ char *last, *argv[MAX_MAILFLAGS + 1];
+ char *mflags, *mpath = def_mailerpath;
+ int i;
+
+ /* Child, set stdin to output side of the pipe */
+ 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));
+ _exit(127);
+ }
+ (void) close(pfd[0]);
+ }
+ (void) close(pfd[1]);
+
+ /* Build up an argv based on the mailer path and flags */
+ if ((mflags = strdup(def_mailerflags)) == NULL) {
+ mysyslog(LOG_ERR, _("unable to allocate memory"));
+ _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;
+
+ /*
+ * Depending on the config, either run the mailer as root
+ * (so user cannot kill it) or as the user (for the paranoid).
+ */
+#ifndef NO_ROOT_MAILER
+ (void) set_perms(PERM_ROOT);
+ execve(mpath, argv, root_envp);
+#else
+ (void) set_perms(PERM_FULL_USER);
+ execv(mpath, argv);
+#endif /* NO_ROOT_MAILER */
+ 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);
+ }
+ break;
+ }
+
+ (void) close(pfd[0]);
+ mail = fdopen(pfd[1], "w");
+
+ /* Pipes are all setup, send message. */
+ (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++) {
+ /* Expand escapes in the subject */
+ 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 /* HAVE_NL_LANGINFO */
+
+ 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_exit(__func__, __FILE__, __LINE__, sudo_debug_subsys);
+ _exit(0);
+}
+
+/*
+ * Determine whether we should send mail based on "status" and defaults options.
+ */
+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=" /* XXX - should be CWD= */
+#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')
+
+/*
+ * Allocate and fill in a new logline.
+ */
+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
+ /* A TSID may be a sudoers-style session ID or a free-form string. */
+ 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
+
+ /*
+ * Compute line length
+ */
+ 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); /* NOTE: last one will fail */
+ }
+ len += sizeof(LL_ENV_STR) + 2 + evlen;
+ }
+ }
+ if (user_cmnd != NULL) {
+ /* Note: we log "sudo -l command arg ..." as "list command arg ..." */
+ 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;
+ }
+
+ /*
+ * Allocate and build up the line.
+ */
+ 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);
+}