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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2009-2020 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.
*/
/*
* 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
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STDBOOL_H
# include <stdbool.h>
#else
# include <compat/stdbool.h>
#endif /* HAVE_STDBOOL_H */
#include <string.h>
#include <signal.h>
#include <limits.h>
#include <time.h>
#include <sudo_compat.h>
#include <sudo_debug.h>
#include <sudo_eventlog.h>
#include <sudo_fatal.h>
#include <sudo_gettext.h>
#include <sudo_iolog.h>
#include <sudo_util.h>
bool
iolog_parse_loginfo_legacy(FILE *fp, const char *iolog_dir,
struct eventlog *evlog)
{
char *buf = NULL, *cp, *ep;
const char *errstr;
size_t bufsize = 0, cwdsize = 0, cmdsize = 0;
bool ret = false;
debug_decl(iolog_parse_loginfo_legacy, SUDO_DEBUG_UTIL);
/*
* Info file has three lines:
* 1) a log info line
* 2) cwd
* 3) command with args
*/
if (getdelim(&buf, &bufsize, '\n', fp) == -1 ||
getdelim(&evlog->cwd, &cwdsize, '\n', fp) == -1 ||
getdelim(&evlog->command, &cmdsize, '\n', fp) == -1) {
sudo_warn(U_("%s: invalid log file"), iolog_dir);
goto done;
}
/* Strip the newline from the cwd and command. */
evlog->cwd[strcspn(evlog->cwd, "\n")] = '\0';
evlog->command[strcspn(evlog->command, "\n")] = '\0';
/*
* Crack the log line (lines and cols not present in old versions).
* timestamp:user:runas_user:runas_group:tty:lines:cols
* XXX - probably better to use strtok and switch on the state.
*/
buf[strcspn(buf, "\n")] = '\0';
cp = buf;
/* timestamp */
if ((ep = strchr(cp, ':')) == NULL) {
sudo_warn(U_("%s: time stamp field is missing"), iolog_dir);
goto done;
}
*ep = '\0';
evlog->submit_time.tv_sec =
(time_t)sudo_strtonum(cp, 0, TIME_T_MAX, &errstr);
if (errstr != NULL) {
sudo_warn(U_("%s: time stamp %s: %s"), iolog_dir, cp, errstr);
goto done;
}
/* submit user */
cp = ep + 1;
if ((ep = strchr(cp, ':')) == NULL) {
sudo_warn(U_("%s: user field is missing"), iolog_dir);
goto done;
}
if ((evlog->submituser = strndup(cp, (size_t)(ep - cp))) == NULL) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
goto done;
}
/* runas user */
cp = ep + 1;
if ((ep = strchr(cp, ':')) == NULL) {
sudo_warn(U_("%s: runas user field is missing"), iolog_dir);
goto done;
}
if ((evlog->runuser = strndup(cp, (size_t)(ep - cp))) == NULL) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
goto done;
}
/* runas group */
cp = ep + 1;
if ((ep = strchr(cp, ':')) == NULL) {
sudo_warn(U_("%s: runas group field is missing"), iolog_dir);
goto done;
}
if (cp != ep) {
if ((evlog->rungroup = strndup(cp, (size_t)(ep - cp))) == NULL) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
goto done;
}
}
/* tty, followed by optional lines + cols */
cp = ep + 1;
if ((ep = strchr(cp, ':')) == NULL) {
/* just the tty */
if ((evlog->ttyname = strdup(cp)) == NULL) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
goto done;
}
} else {
/* tty followed by lines + cols */
if ((evlog->ttyname = strndup(cp, (size_t)(ep - cp))) == NULL) {
sudo_warnx(U_("%s: %s"), __func__, U_("unable to allocate memory"));
goto done;
}
cp = ep + 1;
/* need to NULL out separator to use sudo_strtonum() */
/* XXX - use sudo_strtonumx */
if ((ep = strchr(cp, ':')) != NULL) {
*ep = '\0';
}
evlog->lines = (int)sudo_strtonum(cp, 1, INT_MAX, &errstr);
if (errstr != NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s: tty lines %s: %s", iolog_dir, cp, errstr);
}
if (ep != NULL) {
cp = ep + 1;
evlog->columns = (int)sudo_strtonum(cp, 1, INT_MAX, &errstr);
if (errstr != NULL) {
sudo_debug_printf(SUDO_DEBUG_ERROR|SUDO_DEBUG_LINENO,
"%s: tty cols %s: %s", iolog_dir, cp, errstr);
}
}
}
ret = true;
done:
free(buf);
debug_return_bool(ret);
}
|
