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Utils.cpp
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/*
* @file Utils.cpp
*
* Miscellaneous helper functions
*
* @author igor@
*
* Copyright (c) 2005-2017, Parallels International GmbH
* Copyright (c) 2017-2019 Virtuozzo International GmbH. All rights reserved.
*
* This file is part of OpenVZ. OpenVZ is free software; you can redistribute
* it and/or modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the License,
* or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*
* Our contact details: Virtuozzo International GmbH, Vordergasse 59, 8200
* Schaffhausen, Switzerland.
*/
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <string.h>
#include <algorithm>
#include <map>
#ifndef _WIN_
#include <termios.h>
#include <unistd.h>
#include <pwd.h>
#else
#include <windows.h>
#include <time.h>
#include <conio.h>
#include <stdio.h>
#include <fcntl.h>
#include <io.h>
#define snprintf _snprintf
#define strtoull _strtoui64
#endif
#include <signal.h>
#include <errno.h>
#include <fstream>
#include <sstream>
#include <assert.h>
#include <stdarg.h>
#include <arpa/inet.h>
#include <PrlErrorsValues.h>
// #include "Interfaces/VirtuozzoDomModel.h"
#define EVT_PARAM_OP_RC "op_rc"
#define EVT_PARAM_PROGRESS_STAGE "progress_stage"
#include <PrlOses.h>
#include <PrlApiDeprecated.h>
#include <PrlApiDisp.h>
#include "Utils.h"
#include "CmdParam.h"
#include "PrlDev.h"
#include "Logger.h"
#include "PrlCleanup.h"
static volatile int signo;
extern bool g_problem_report_cmd;
extern const char *capnames[NUMCAP];
PRL_UINT32 g_nJobTimeout = JOB_INFINIT_WAIT_TIMEOUT;
/**
* Load parallels SDK library symbols.
*/
int init_sdk_lib()
{
#ifdef DYN_API_WRAP
if (!SdkWrap_LoadLibFromStdPaths(prl_get_log_verbose() > L_NORMAL))
{
fprintf(stderr, "Failed to load SDK library\n");
return -1;
}
#endif
// Disable logging output to console
PrlApi_SwitchConsoleLogging(0);
PRL_UINT32 nFlags = 0;
nFlags |= g_problem_report_cmd ? PAIF_USE_GRAPHIC_MODE : 0;
PRL_RESULT ret;
ret = PrlApi_InitEx(VIRTUOZZO_API_VER,
PAM_SERVER,
nFlags,
0);
if (PRL_FAILED(ret)) {
fprintf(stderr, "PrlApi_Init returned the following error: (%s)\n",
get_error_str(ret).c_str());
return -1;
}
//PrlApi_SetLogPath(NULL);
return 0;
}
void deinit_sdk_lib()
{
#ifdef DYN_API_WRAP
if (SdkWrap_IsLoaded())
{
#endif
PrlApi_Deinit();
#ifdef DYN_API_WRAP
SdkWrap_Unload();
}
#endif
fflush(stdout);
fflush(stderr);
}
static int problem_report_cb(PRL_HANDLE hEvent, void *)
{
PrlHandle h(hEvent);
PRL_HANDLE_TYPE type;
int ret;
if ((ret = PrlHandle_GetType(h.get_handle(), &type))) {
prl_log(L_DEBUG, "PrlHandle_GetType: %s",
get_error_str(ret).c_str());
return ret;
}
if (type == PHT_EVENT) {
PRL_EVENT_TYPE evt_type;
if ((ret = PrlEvent_GetType(h.get_handle(), &evt_type))) {
prl_log(L_DEBUG, "PrlEvent_GetType: %s",
get_error_str(ret).c_str());
return ret;
}
if (evt_type == PET_DSP_EVT_JOB_PROGRESS_CHANGED) {
PrlHandle hPrm;
ret = PrlEvent_GetParam(h.get_handle(), 0, hPrm.get_ptr());
if (PRL_FAILED(ret)) {
prl_log(L_DEBUG, "PrlEvent_GetParam %s",
get_error_str(ret).c_str());
return ret;
}
PRL_UINT32 val;
ret = PrlEvtPrm_ToUint32(hPrm.get_handle(), &val);
if (PRL_FAILED(ret)) {
prl_log(L_DEBUG, "PrlEvtPrm_ToUint32 %s",
get_error_str(ret).c_str());
return ret;
}
print_procent(val);
}
}
return 0;
}
/* Parse audentification line in format:
[proto://][[user][:passwd]@]server[:port]
*/
static int parse_url(const std::string &str, LoginInfo &login)
{
std::string url;
std::string user;
std::string::size_type len;
std::string::size_type pos;
/* skip proto */
pos = str.find("://");
if (pos != std::string::npos)
url = str.substr(pos + 3);
else
url = str;
len = url.length();
pos = url.find_first_of("@");
if (pos != std::string::npos) {
user = url.substr(0, pos);
pos++;
} else {
pos = 0;
}
/* server:port */
std::string::size_type port_pos = url.find_first_of(":", pos);
std::string::size_type server_len = 0;
if (port_pos != std::string::npos) {
std::string::size_type port_len = len - port_pos - 1;
if (port_len != 0) {
std::string port = url.substr(port_pos + 1, port_len);
login.port = atoi(port.c_str());
server_len = port_pos - pos;
}
} else {
server_len = len - pos;
}
if (server_len <= 0) // server is not specified
return -1;
login.server = url.substr(pos, server_len);
/* user:passwd */
std::string::size_type user_pos = user.find_last_of(":");
if (user_pos != std::string::npos) {
login.user = user.substr(0, user_pos);
login.get_passwd_buf() = user.substr(user_pos + 1);
} else {
login.user = user;
}
return 0;
}
int send_problem_report(const PrlHandle &hProblemReport, const ProblemReportParam ¶m)
{
PRL_RESULT ret;
PRL_UINT32 resultCount = 0;
PrlHandle hResult;
bool bUseProxy = !param.dont_use_proxy, ok = false;
std::string sHost, sUser, sPassword;
int nPort = 0;
LoginInfo url;
unsigned int timeout = JOB_INFINIT_WAIT_TIMEOUT == g_nJobTimeout ? JOB_WAIT_TIMEOUT : g_nJobTimeout;
if (!param.proxy_settings.empty()) {
parse_url(param.proxy_settings, url);
sHost = url.server;
sUser = url.user;
sPassword = url.get_passwd_from_stack(ok);
nPort = url.port;
}
PrlHandle hJob(PrlReport_Send(hProblemReport.get_handle(),
bUseProxy,
(sHost.empty() ? 0 : sHost.c_str()),
nPort,
(sUser.empty() ? 0 : sUser.c_str()),
(sPassword.empty() ? 0 : sPassword.c_str()),
timeout,
0, problem_report_cb, 0));
const PrlHook *h = get_cleanup_ctx().register_hook(cancel_job, hJob.get_handle());
ret = get_job_result(hJob.get_handle(), hResult.get_ptr(), &resultCount, timeout);
get_cleanup_ctx().unregister_hook(h);
if (ret == 0) {
char data[128];
PRL_UINT32 len = sizeof(data);
if ((ret = PrlResult_GetParamAsString(hResult.get_handle(), data, &len)))
return prl_err(-1, "PrlResult_GetParamAsString: %s",
get_error_str(ret).c_str());
else
prl_log(0, "\nThe problem report was successfully sent with id: %d", atoi(data));
} else {
prl_log(L_ERR, "\nFailed to send problem report: %s",
get_error_str(ret).c_str());
}
return ret;
}
int send_problem_report_on_stdout(const PrlHandle &hProblemReport)
{
int ret = 0;
PRL_PROBLEM_REPORT_SCHEME nReportScheme = PRS_NEW_PACKED;
if ((ret = PrlReport_GetScheme(hProblemReport.get_handle(), &nReportScheme)))
return prl_err(-1, "Failed to get problem report scheme: %s",
get_error_str(ret).c_str());
if (PRS_OLD_XML_BASED == nReportScheme)
{
unsigned int len = 0;
if ((ret = PrlReport_AsString(hProblemReport.get_handle(), 0, &len)))
return prl_err(-1, "PrlReport_AsString: %s",
get_error_str(ret).c_str());
char *data = (char *) malloc(len + 1);
if (data == NULL)
return prl_err(-1, "Unable to allocate %d bytes", len);
if ((ret = PrlReport_AsString(hProblemReport.get_handle(), data, &len)))
return prl_err(-1, "PrlReport_AsString: %s",
get_error_str(ret).c_str());
fprintf(stdout, "%s\n", data);
free(data);
}
else
{
PRL_UINT32 nBufferSize = 0;
if ((ret = PrlReport_GetData(hProblemReport.get_handle(), 0, &nBufferSize)))
return prl_err(-1, "PrlReport_GetData: %s",
get_error_str(ret).c_str());
if (nBufferSize == 0)
return prl_err(-1, "An empty problem report received");
void *data = malloc(nBufferSize);
if (data == NULL)
return prl_err(-1, "Unable to allocate %d bytes", nBufferSize);
if ((ret = PrlReport_GetData(hProblemReport.get_handle(), data, &nBufferSize)))
return prl_err(-1, "PrlEvtPrm_GetBuffer: %s",
get_error_str(ret).c_str());
#ifdef _WIN_
//Switch stdout to the binary mode - https://bugzilla.sw.ru/show_bug.cgi?id=462039
int nRetCode = _setmode(_fileno(stdout), _O_BINARY);
(void *)nRetCode;
assert(-1 != nRetCode);
#endif
ret = fwrite(data, nBufferSize, 1, stdout);
free(data);
}
return 0;
}
int assembly_problem_report(const PrlHandle &hProblemReport, const ProblemReportParam ¶m, PRL_UINT32 flags)
{
PrlHandle hResult;
PRL_UINT32 resultCount = 0;
int ret = 0;
if ((ret = PrlReport_SetUserName(hProblemReport.get_handle(), param.user_name.c_str())) != 0)
prl_log(L_ERR, "Failed to set user name: %s", get_error_str(ret).c_str());
if ((ret = PrlReport_SetUserEmail(hProblemReport.get_handle(), param.user_email.c_str())) != 0)
prl_log(L_ERR, "Failed to set user E-mail: %s", get_error_str(ret).c_str());
if ((ret = PrlReport_SetDescription(hProblemReport.get_handle(), param.description.c_str())) != 0)
prl_log(L_ERR, "Failed to set description: %s", get_error_str(ret).c_str());
PrlHandle hJob(PrlReport_Assembly(hProblemReport.get_handle(), PPRF_ADD_CLIENT_PART | (param.stand_alone ? PPRF_ADD_SERVER_PART : 0) | flags));
return get_job_result(hJob.get_handle(), hResult.get_ptr(), &resultCount);
}
PrlBase* PrlBase::free()
{
PrlHandle_Free(m_handle) ;
m_handle = PRL_INVALID_HANDLE ;
return this ;
}
static void get_op_rc(PrlHandle &hEvent, PRL_RESULT &retcode)
{
PRL_UINT32 i, nCount = 0, len, rc;
PrlEvent_GetParamsCount(hEvent.get_handle(), &nCount);
for (i = 0; i < nCount; i++) {
char buf[100];
PrlHandle hParam;
PrlEvent_GetParam(hEvent.get_handle(), i, hParam.get_ptr());
len = sizeof(buf);
PrlEvtPrm_GetName(hParam.get_handle(), buf, &len);
if (!strncmp(buf, EVT_PARAM_OP_RC, sizeof(EVT_PARAM_OP_RC) -1) &&
PrlEvtPrm_ToUint32(hParam.get_handle(), &rc) == 0)
{
retcode = (PRL_RESULT)rc;
break;
}
}
}
PRL_RESULT get_job_retcode(PRL_HANDLE hJob, std::string &err,
unsigned int timeout)
{
PRL_RESULT ret, retcode;
err.clear();
if ((ret = PrlJob_Wait(hJob, (JOB_INFINIT_WAIT_TIMEOUT == timeout ? g_nJobTimeout : timeout)))) {
err = "PrlJob_Wait: " + get_error_str(ret);
return ret;
}
if ((ret = PrlJob_GetRetCode(hJob, &retcode))) {
err = "PrlJob_GetRetCode: " +
get_error_str(ret);
return ret;
}
if (retcode) {
/* In case error get error message from the job,
if failed get from the retcode.
*/
PrlHandle hErr;
if ((ret = PrlJob_GetError(hJob, hErr.get_ptr()))) {
err = get_error_str(retcode);
return retcode;
}
if (get_result_error_string(hErr.get_handle(), err))
err = get_error_str(retcode);
std::string d(get_details(hJob));
if (!d.empty())
err += " (Details: " + d + ")";
/* #PSBM-27689 report vzctl specific error code */
if (retcode == PRL_ERR_VZCTL_OPERATION_FAILED)
get_op_rc(hErr, retcode);
}
return retcode;
}
PRL_RESULT get_job_result(PRL_HANDLE hJob, PRL_HANDLE_PTR hResult,
PRL_UINT32_PTR resultCount, unsigned int timeout)
{
PRL_RESULT ret;
std::string err;
if ((ret = get_job_retcode(hJob, err, timeout)))
return prl_err(ret, "%s", err.c_str());
if ((ret = PrlJob_GetResult(hJob, hResult)))
return prl_err(ret, "PrlJob_GetResult returned the following error:"
" %s [%d]",
get_error_str(ret).c_str(), ret);
if ((ret = PrlResult_GetParamsCount(*hResult, resultCount)))
return prl_err(ret, "PrlResult_GetParamsCount returned the following"
" error: %s [%d]",
get_error_str(ret).c_str(), ret);
return ret;
}
int get_result_as_string(PRL_HANDLE hResult, std::string &out, bool xml)
{
PRL_RESULT ret;
PRL_UINT32 len, count;
char *buf;
len = 0;
if ((ret = PrlResult_GetParamsCount(hResult, &count)))
return prl_err(-1, "PrlResult_GetParamsCount: %s",
get_error_str(ret).c_str());
if (count == 0)
return 0;
if ((ret = PrlResult_GetParamAsString(hResult, 0, &len)))
return prl_err(-1, "PrlResult_GetParamAsString: %s",
get_error_str(ret).c_str());
if ((buf = (char*) malloc(len + 1)) == NULL)
return prl_err(-1, "Unable to allocate %d bytes", len);
if ((ret = PrlResult_GetParamAsString(hResult, buf, &len))) {
free(buf);
return prl_err(-1, "PrlResult_GetParamAsString: %s",
get_error_str(ret).c_str());
}
if (xml) {
char *src, *dst;
int c;
src = dst = buf;
while (*src++) {
/* translate 
 -> \r */
if (src[0] == '&' && src[1] == '#' && src[2] == 'x') {
if (sscanf(src + 3, "%x", &c) == 1) {
*dst = (char) c;
while (*src && *src != ';') src++;
} else {
*dst = *src;
}
} else {
*dst = *src;
}
dst++;
}
*dst = 0;
}
out = buf;
free(buf);
return 0;
}
PRL_RESULT get_job_result_object(PRL_HANDLE hJob, PRL_HANDLE_PTR hObject, unsigned int timeout)
{
PrlHandle hResult;
PRL_RESULT ret;
PRL_UINT32 resultCount ;
ret = get_job_result(hJob, hResult.get_ptr(), &resultCount, timeout);
if (PRL_FAILED(ret))
return ret;
if ((ret = PrlResult_GetParam(hResult.get_handle(), hObject)))
return prl_err(ret, "PrlResult_GetParams: %s",
get_error_str(ret).c_str(), ret);
return ret;
}
/** Retruns string representation of error code */
std::string get_error_str(int nErrCode)
{
char sErrorBuf[4096];
PRL_UINT32 nErrorBufLength = sizeof(sErrorBuf);
PRL_RESULT ret;
std::string result;
// get first part of error
ret = PrlApi_GetResultDescription(nErrCode, PRL_TRUE, PRL_FALSE,
sErrorBuf, &nErrorBufLength);
if (PRL_SUCCEEDED(ret))
result = sErrorBuf;
// get second part of error
nErrorBufLength = sizeof(sErrorBuf);
ret = PrlApi_GetResultDescription(nErrCode, PRL_FALSE, PRL_FALSE,
sErrorBuf, &nErrorBufLength);
if (PRL_SUCCEEDED(ret)) {
if (!(result == sErrorBuf)) {
result += " ";
result += std::string(sErrorBuf);
}
}
return result;
}
PRL_RESULT get_result_error_string(PRL_HANDLE hResult, std::string &err)
{
//PrlHandle h(hResult);
char buf[1024], buf2[1024];
unsigned int len;
PRL_RESULT ret, retcode;
char codebuf[64];
std::string codestr;
err = "";
if ((ret = PrlEvent_GetErrCode(hResult, &retcode)))
{
prl_log(L_DEBUG, "PrlEvent_GetErrCode: %s",
get_error_str(ret).c_str());
return ret;
}
if (snprintf(codebuf, sizeof(codebuf)-1, "Error code: %d", retcode) > 0)
codestr = codebuf;
len = sizeof(buf);
if ((ret = PrlEvent_GetErrString(hResult, PRL_TRUE, PRL_FALSE, buf, &len )))
{
prl_log(L_DEBUG, "PrlEvent_GetErrString: %s",
get_error_str(ret).c_str());
err = codestr;
return ret;
}
len = sizeof(buf2);
if ((ret = PrlEvent_GetErrString(hResult, PRL_FALSE, PRL_FALSE, buf2, &len )))
{
prl_log(L_DEBUG, "PrlEvent_GetErrString: %s",
get_error_str(ret).c_str());
err = codestr;
return ret;
}
err = buf;
if (strcmp(buf, buf2)) {
err += " ";
err += buf2;
}
return ret;
}
std::string get_details(PRL_HANDLE hJob)
{
PRL_RESULT ret;
std::string err;
PrlHandle hErr;
if (PRL_FAILED((ret = PrlJob_GetError(hJob, hErr.get_ptr()))))
return err;
PrlHandle hParam;
ret = PrlEvent_GetParamByName(hErr.get_handle(), "Details", hParam.get_ptr());
if (PRL_SUCCEEDED(ret)) {
PRL_UINT32 len = 0;
if (PRL_FAILED(PrlEvtPrm_ToString(hParam.get_handle(), NULL, &len))
|| len < 2)
return err;
len--; // sdk appends '\0', which we don't need in std::string
err.resize(len);
PrlEvtPrm_ToString(hParam.get_handle(), &err[0], &len);
return err;
}
ret = PrlEvent_GetParamByName(hErr.get_handle(), "internal_event", hParam.get_ptr());
if (PRL_SUCCEEDED(ret)) {
PrlHandle e;
if (PRL_FAILED(PrlEvtPrm_ToHandle(hParam.get_handle(), e.get_ptr())))
return err;
get_result_error_string(e.get_handle(), err);
return err;
}
return err;
}
void handle_job_err(PRL_HANDLE hJob, PRL_RESULT ret)
{
if (ret != PRL_ERR_TIMEOUT)
return;
prl_log(0, "Operation timeout. Cancelling job.");
PRL_HANDLE hCancel = PrlJob_Cancel(hJob);
if (hCancel == PRL_INVALID_HANDLE) {
prl_log(0, "Failed to cancel job.") ;
return;
}
std::string err;
if ((ret = get_job_retcode(hCancel, err, 60 * 1000)))
prl_err(ret, "Failed to cancel job: %s.", err.c_str());
else
prl_log(0, "Job cancelled.");
PrlHandle_Free(hCancel);
}
using namespace std;
/* Parse audentification line in format:
user[[:passwd]@server[:port]]
*/
int parse_auth(const std::string &auth, LoginInfo &login,
char *hide_passwd)
{
std::string user;
string::size_type port_pos = string::npos;
string::size_type server_len;
string::size_type len = auth.length();
string::size_type pos = auth.find_last_of("@");
if (pos == string::npos) {
user = "root";
pos = 0;
} else {
user = auth.substr(0, pos);
pos++;
}
bool ipv6 = false;
unsigned int count = 0;
for (unsigned int i = pos; i < len; i++)
if (auth[i] == ':')
count++;
if (count > 1)
ipv6 = true;
/* server:port */
if (auth[pos] == '[') {
string::size_type ip6_pos = auth.find_last_of("]");
if (ip6_pos == string::npos)
return -1;
port_pos = auth.find_first_of(":", ip6_pos);
pos++;
len--;
} else {
if (!ipv6)
port_pos = auth.find_first_of(":", pos);
}
if (port_pos != string::npos) {
string::size_type port_len = auth.length() - port_pos - 1;
if (port_len == 0)
return -1;
std::string port = auth.substr(port_pos + 1, port_len);
login.port = atoi(port.c_str());
server_len = port_pos - pos;
} else
server_len = len - pos;
if (server_len <= 1) // server is not specified
return -1;
login.server = auth.substr(pos, server_len);
/* user:passwd */
string::size_type user_pos = user.find_last_of(":");
if (user_pos != string::npos) {
login.user = user.substr(0, user_pos);
login.get_passwd_buf() = user.substr(user_pos + 1);
#ifdef _LIN_
if (hide_passwd != NULL &&
user_pos < strlen(hide_passwd))
{
int len, n;
len = strlen(hide_passwd + user_pos + 1);
n = user.length() - (user_pos + 1);
if (n > len)
n = len;
memset(hide_passwd + user_pos + 1, '*', n);
}
#else
(void)hide_passwd;
#endif
} else {
login.user = user;
}
if (login.user.empty())
return -1;
if (login.server.empty())
login.server = "127.0.0.1";
return 0;
}
int parse_userpw(const std::string &userpw, std::string &user, std::string &pw)
{
string::size_type user_pos = userpw.find_first_of(":");
if (user_pos == string::npos) {
user = userpw;
return 0;
}
user = userpw.substr(0, user_pos);
pw = userpw.substr(user_pos + 1);
return 0;
}
std::string parse_mac(const char *mac)
{
char buf[3];
char *endptr;
const char *sp = mac;
const char *ep = mac + strlen(mac);
if (!strcmp(mac, "auto"))
return std::string("auto");
std::string out;
while (sp < ep) {
long val;
buf[0] = *sp++;
buf[1] = *sp++;
if (sp > ep)
return std::string();
buf[2] = '\0';
val = strtol(buf, &endptr, 16);
(void)val;
if (*endptr != '\0')
return std::string();
out += buf;
/* skip ':' to convert to the SDK mac representation
00:18:F3:F0:0D:A0 -> 0018F3F00DA0
*/
if (*sp == ':')
sp++;
}
if (out.length() != 12)
return std::string();
return out;
}
const char *vmstate2str(VIRTUAL_MACHINE_STATE nVmState)
{
switch (nVmState) {
case VMS_STOPPED: return "stopped";
case VMS_STARTING: return "starting";
case VMS_RESTORING: return "restoring";
case VMS_RUNNING: return "running";
case VMS_PAUSED: return "paused";
case VMS_RESETTING: return "resetting";
case VMS_PAUSING: return "pausing";
case VMS_SUSPENDING: return "suspending";
case VMS_STOPPING: return "stopping";
case VMS_COMPACTING: return "compacting";
case VMS_SUSPENDED: return "suspended";
case VMS_SNAPSHOTING: return "snapshoting";
case VMS_CONTINUING: return "continuing";
case VMS_MIGRATING: return "migrating";
case VMS_DELETING_STATE: return "del_snapshot";
case VMS_RESUMING: return "resuming";
case VMS_SUSPENDING_SYNC: return "syncing";
case VMS_UNKNOWN: return "invalid";
case VMS_RECONNECTING: return "reconnecting";
case VMS_MOUNTED: return "mounted";
}
return "unknown";
}
int str2dev_assign_mode(const std::string &str)
{
if (str == "host")
return AM_HOST;
else if (str == "vm")
return AM_VM;
else
return AM_NONE;
}
boost::optional<PRL_VM_BACKUP_MODE> str2backup_mode(const std::string& str)
{
if (str == "push-with-reversed-delta")
return PBM_PUSH_REVERSED_DELTA;
else if (str == "push")
return PBM_PUSH;
prl_err(-1, "Cannot recognize the backup mode", errno);
return {};
}
const char *dev_assign_mode2str(int mode)
{
switch (mode) {
case AM_HOST: return "host";
case AM_VM: return "vm";
}
return "-";
}
#ifndef _WIN_
static void term_printf(const char *format, ...)
{
FILE *f = fopen("/dev/tty", "w");
if (!f) {
prl_err(-1, "Failed to open /dev/tty: %m (%d)", errno);
return;
}
va_list ap;
va_start(ap, format);
vfprintf(f, format, ap);
va_end(ap);
fclose(f);
}
static void handler(int sig)
{
signo = sig;
}
static int read_passwd_helper(std::string &passwd)
{
struct termios term, old_term;
struct sigaction sa, old_sa_int, old_sa_hup;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sa.sa_handler = handler;
/* Fixme: should be also handled:
SIGQUIT, SIGTERM, SIGTSTP, SIGTTIN, SIGTTOU
*/
sigaction(SIGINT, &sa, &old_sa_int);
sigaction(SIGHUP, &sa, &old_sa_hup);
signo = 0;
// turn off echo
if (tcgetattr(STDIN_FILENO, &old_term) == 0) {
memcpy(&term, &old_term, sizeof(term));
term.c_lflag &= ~(ECHO | ECHONL);
tcsetattr(STDIN_FILENO, TCSAFLUSH, &term);
}
char c;
while ( std::cin.good() && ( c = std::cin.get() ) != '\n' )
passwd += c;
if (!(term.c_lflag & ECHO))
term_printf("\n");
// restore terminal
tcsetattr(STDIN_FILENO, TCSAFLUSH, &old_term);
sigaction(SIGINT, &old_sa_int, NULL);
sigaction(SIGHUP, &old_sa_hup, NULL);
return (signo != 0);
}
static bool is_terminal_input()
{
return !!isatty(STDIN_FILENO);
}
static bool is_terminal_output()
{
static int is_tty = -1;
if (is_tty == -1)
is_tty = isatty(STDOUT_FILENO);
return is_tty;
}
#else
static int WindowsTerminal_getConsoleMode(DWORD *mode)
{
HANDLE hConsole = GetStdHandle(STD_INPUT_HANDLE);
if (hConsole == INVALID_HANDLE_VALUE)
return -1;
if (!GetConsoleMode(hConsole, mode))
return -1;
return 0;
}
static int WindowsTerminal_setConsoleMode(DWORD mode)
{
HANDLE hConsole = GetStdHandle (STD_INPUT_HANDLE);
if (hConsole == INVALID_HANDLE_VALUE)
return -1;
SetConsoleMode(hConsole, mode);
return 0;
}
static int read_passwd_helper(std::string &passwd)
{
HANDLE hInputDevice = GetStdHandle (STD_INPUT_HANDLE);
DWORD deviceType = GetFileType(hInputDevice);
DWORD mode;
if (deviceType == FILE_TYPE_CHAR)
{
if (WindowsTerminal_getConsoleMode(&mode))
return -1;
WindowsTerminal_setConsoleMode(mode & ~ENABLE_ECHO_INPUT);
};
std::cin >> passwd;
if (deviceType == FILE_TYPE_CHAR)
WindowsTerminal_setConsoleMode(mode);
fputc('\n', stderr);
return 0;
}
static void term_printf(const char *format, ...)
{
va_list ap;
va_start(ap, format);
/* TODO: implement proper printing to terminal instead of stderr */
vfprintf(stderr, format, ap);
va_end(ap);
}
static bool is_terminal_input()
{
/* TODO: implement this */
return true;
}
static bool is_terminal_output()
{
/* TODO: implement this */
return true;
}
#endif
int read_passwd(const std::string &name, const std::string &server,
std::string &passwd)
{
term_printf("%s@%s's password: ", name.c_str(), server.c_str());
return read_passwd_helper(passwd);
}
int read_passwd(std::string &passwd, const std::string &prompt)
{
/* if we have a terminal behind stdin - prompt user to enter the password */
if (is_terminal_input()) {
if (prompt.empty())
term_printf("Please enter password: ");
else
term_printf("%s", prompt.c_str());
return read_passwd_helper(passwd);
}
/* read from stdin if no terminal available */
std::getline(std::cin, passwd);
return 0;
}
int file2str(const char *filename, std::string &out)
{
char buffer[4096];
std::ostringstream to;
std::ifstream from(filename);
if (!from)
return prl_err(-1, "Failed to open %s", filename);
while (from.read(buffer, sizeof(buffer))
|| from.gcount() > 0)
if (!to.write(buffer, from.gcount()))
return prl_err(-1, "Failed to write %d bytes",
from.gcount());
out = to.str();
return 0;
}