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Refs codership/mysql-wsrep#141: this commit

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1. Passes wsrep_sst_auth_value to SST scripts via WSREP_SST_OPT_AUTH envronmental variable, so it never appears on the command line
  2. In mysqldump and xtrabackup* SST scripts which rely on MySQL authentication, instead of passing password on the command line, SST script sets MYSQL_PWD environment variable, so that password also never appears on the mysqldump/innobackupex command line.
This commit is contained in:
Alexey Yurchenko 2015-06-06 01:08:41 +03:00 committed by Nirbhay Choubey
parent 4f4f3a5e32
commit d78110e7fa
9 changed files with 294 additions and 113 deletions
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35
scripts/wsrep_sst_common.sh
View File

@ -1,4 +1,4 @@
# Copyright (C) 2012-2014 Codership Oy
# Copyright (C) 2012-2015 Codership Oy
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@ -20,7 +20,9 @@ set -u
WSREP_SST_OPT_BYPASS=0
WSREP_SST_OPT_DATA=""
WSREP_SST_OPT_AUTH=""
WSREP_SST_OPT_AUTH=${WSREP_SST_OPT_AUTH:-}
WSREP_SST_OPT_USER=${WSREP_SST_OPT_USER:-}
WSREP_SST_OPT_PSWD=${WSREP_SST_OPT_PSWD:-}
while [ $# -gt 0 ]; do
case "$1" in
@ -28,10 +30,6 @@ case "$1" in
readonly WSREP_SST_OPT_ADDR="$2"
shift
;;
'--auth')
WSREP_SST_OPT_AUTH="$2"
shift
;;
'--bypass')
WSREP_SST_OPT_BYPASS=1
;;
@ -114,12 +112,30 @@ else
MY_PRINT_DEFAULTS=$(which my_print_defaults)
fi
wsrep_auth_not_set()
{
[ -z "$WSREP_SST_OPT_AUTH" -o "$WSREP_SST_OPT_AUTH" = "(null)" ]
}
# For Bug:1200727
if $MY_PRINT_DEFAULTS -c $WSREP_SST_OPT_CONF sst | grep -q "wsrep_sst_auth";then
if [ -z "$WSREP_SST_OPT_AUTH" -o "$WSREP_SST_OPT_AUTH" = "(null)" ];then
WSREP_SST_OPT_AUTH=$(my_print_defaults -c $WSREP_SST_OPT_CONF sst | grep -- "--wsrep_sst_auth" | cut -d= -f2)
if $MY_PRINT_DEFAULTS -c $WSREP_SST_OPT_CONF sst | grep -q "wsrep_sst_auth"
then
if wsrep_auth_not_set
then
WSREP_SST_OPT_AUTH=$(MY_PRINT_DEFAULTS -c $WSREP_SST_OPT_CONF sst | grep -- "--wsrep_sst_auth" | cut -d= -f2)
fi
fi
readonly WSREP_SST_OPT_AUTH
# Splitting AUTH into potential user:password pair
if ! wsrep_auth_not_set
then
readonly AUTH_VEC=(${WSREP_SST_OPT_AUTH//:/ })
[ -n "${AUTH_VEC[0]}" ] && WSREP_SST_OPT_USER="${AUTH_VEC[0]}"
[ -n "${AUTH_VEC[1]}" ] && WSREP_SST_OPT_PSWD="${AUTH_VEC[1]}"
fi
readonly WSREP_SST_OPT_USER
readonly WSREP_SST_OPT_PSWD
if [ -n "${WSREP_SST_OPT_DATA:-}" ]
then
@ -128,7 +144,6 @@ else
SST_PROGRESS_FILE=""
fi
wsrep_log()
{
# echo everything to stderr so that it gets into common error log

34
scripts/wsrep_sst_mysqldump.sh
View File

@ -1,5 +1,5 @@
#!/bin/bash -e
# Copyright (C) 2009 Codership Oy
#!/bin/bash -ue
# Copyright (C) 2009-2015 Codership Oy
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@ -38,7 +38,6 @@ local_ip()
return 1
}
if test -z "$WSREP_SST_OPT_USER"; then wsrep_log_error "USER cannot be nil"; exit $EINVAL; fi
if test -z "$WSREP_SST_OPT_HOST"; then wsrep_log_error "HOST cannot be nil"; exit $EINVAL; fi
if test -z "$WSREP_SST_OPT_PORT"; then wsrep_log_error "PORT cannot be nil"; exit $EINVAL; fi
if test -z "$WSREP_SST_OPT_LPORT"; then wsrep_log_error "LPORT cannot be nil"; exit $EINVAL; fi
@ -54,7 +53,7 @@ then
fi
# Check client version
CLIENT_MINOR=$(mysql --version | cut -d ' ' -f 6 | cut -d '.' -f 2)
CLIENT_MINOR=$($MYSQL_CLIENT --version | cut -d ' ' -f 6 | cut -d '.' -f 2)
if [ $CLIENT_MINOR -lt "5" ]
then
$MYSQL_CLIENT --version >&2
@ -62,13 +61,18 @@ then
exit $EINVAL
fi
# For Bug:1293798
if [ -z "$WSREP_SST_OPT_PSWD" -a -n "$WSREP_SST_OPT_AUTH" ]; then
WSREP_SST_OPT_USER=$(echo $WSREP_SST_OPT_AUTH | cut -d: -f1)
WSREP_SST_OPT_PSWD=$(echo $WSREP_SST_OPT_AUTH | cut -d: -f2)
fi
AUTH="-u$WSREP_SST_OPT_USER"
if test -n "$WSREP_SST_OPT_PSWD"; then AUTH="$AUTH -p$WSREP_SST_OPT_PSWD"; fi
[ -n "$WSREP_SST_OPT_USER" ] && AUTH="-u$WSREP_SST_OPT_USER" || AUTH=
# Refs https://github.com/codership/mysql-wsrep/issues/141
# Passing password in MYSQL_PWD environment variable is considered
# "extremely insecure" by MySQL Guidelines for Password Security
# (https://dev.mysql.com/doc/refman/5.6/en/password-security-user.html)
# that is even less secure than passing it on a command line! It is doubtful:
# the whole command line is easily observable by any unprivileged user via ps,
# whereas (at least on Linux) unprivileged user can't see process environment
# that he does not own. So while it may be not secure in the NSA sense of the
# word, it is arguably more secure than passing password on the command line.
[ -n "$WSREP_SST_OPT_PSWD" ] && export MYSQL_PWD="$WSREP_SST_OPT_PSWD"
STOP_WSREP="SET wsrep_on=OFF;"
@ -104,10 +108,10 @@ MYSQL="$MYSQL_CLIENT $AUTH -h$WSREP_SST_OPT_HOST -P$WSREP_SST_OPT_PORT "\
# need to disable logging when loading the dump
# reason is that dump contains ALTER TABLE for log tables, and
# this causes an error if logging is enabled
GENERAL_LOG_OPT=`$MYSQL --skip-column-names -e"$STOP_WSREP SELECT @@GENERAL_LOG"`
SLOW_LOG_OPT=`$MYSQL --skip-column-names -e"$STOP_WSREP SELECT @@SLOW_QUERY_LOG"`
$MYSQL -e"$STOP_WSREP SET GLOBAL GENERAL_LOG=OFF"
$MYSQL -e"$STOP_WSREP SET GLOBAL SLOW_QUERY_LOG=OFF"
GENERAL_LOG_OPT=`$MYSQL --skip-column-names -e "$STOP_WSREP SELECT @@GENERAL_LOG"`
SLOW_LOG_OPT=`$MYSQL --skip-column-names -e "$STOP_WSREP SELECT @@SLOW_QUERY_LOG"`
$MYSQL -e "$STOP_WSREP SET GLOBAL GENERAL_LOG=OFF"
$MYSQL -e "$STOP_WSREP SET GLOBAL SLOW_QUERY_LOG=OFF"
# commands to restore log settings
RESTORE_GENERAL_LOG="SET GLOBAL GENERAL_LOG=$GENERAL_LOG_OPT;"

2
scripts/wsrep_sst_rsync.sh
View File

@ -32,8 +32,8 @@ wsrep_check_programs rsync
cleanup_joiner()
{
wsrep_log_info "Joiner cleanup."
local PID=$(cat "$RSYNC_PID" 2>/dev/null || echo 0)
wsrep_log_info "Joiner cleanup. rsync PID: $PID"
[ "0" != "$PID" ] && kill $PID && sleep 0.5 && kill -9 $PID >/dev/null 2>&1 \
|| :
rm -rf "$RSYNC_CONF"

14
scripts/wsrep_sst_xtrabackup-v2.sh
View File

@ -77,7 +77,6 @@ pcmd="pv $pvopts"
declare -a RC
INNOBACKUPEX_BIN=innobackupex
readonly AUTH=(${WSREP_SST_OPT_AUTH//:/ })
DATA="${WSREP_SST_OPT_DATA}"
INFO_FILE="xtrabackup_galera_info"
IST_FILE="xtrabackup_ist"
@ -576,13 +575,14 @@ then
itmpdir=$(mktemp -d)
wsrep_log_info "Using $itmpdir as innobackupex temporary directory"
if [ "${AUTH[0]}" != "(null)" ]; then
INNOEXTRA+=" --user=${AUTH[0]}"
fi
if [ "$WSREP_SST_OPT_USER" != "(null)" ]; then
INNOEXTRA+=" --user=$WSREP_SST_OPT_USER"
fi
if [ ${#AUTH[*]} -eq 2 ]; then
INNOEXTRA+=" --password=${AUTH[1]}"
elif [ "${AUTH[0]}" != "(null)" ]; then
if [ -n "$WSREP_SST_OPT_PSWD" ]; then
# INNOEXTRA+=" --password=$WSREP_SST_OPT_PSWD"
export MYSQL_PWD="$WSREP_SST_OPT_PSWD"
else
# Empty password, used for testing, debugging etc.
INNOEXTRA+=" --password="
fi

14
scripts/wsrep_sst_xtrabackup.sh
View File

@ -61,7 +61,6 @@ pcmd="pv $pvopts"
declare -a RC
INNOBACKUPEX_BIN=innobackupex
readonly AUTH=(${WSREP_SST_OPT_AUTH//:/ })
DATA="${WSREP_SST_OPT_DATA}"
INFO_FILE="xtrabackup_galera_info"
IST_FILE="xtrabackup_ist"
@ -435,13 +434,14 @@ then
then
TMPDIR="${TMPDIR:-/tmp}"
if [ "${AUTH[0]}" != "(null)" ]; then
INNOEXTRA+=" --user=${AUTH[0]}"
fi
if [ "$WSREP_SST_OPT_USER" != "(null)" ]; then
INNOEXTRA+=" --user=$WSREP_SST_OPT_USER"
fi
if [ ${#AUTH[*]} -eq 2 ]; then
INNOEXTRA+=" --password=${AUTH[1]}"
elif [ "${AUTH[0]}" != "(null)" ]; then
if [ -n "$WSREP_SST_OPT_PSWD" ]; then
# INNOEXTRA+=" --password=$WSREP_SST_OPT_PSWD"
export MYSQL_PWD="$WSREP_SST_OPT_PSWD"
else
# Empty password, used for testing, debugging etc.
INNOEXTRA+=" --password="
fi

2
sql/wsrep_notify.cc
View File

@ -97,7 +97,7 @@ void wsrep_notify_status (wsrep_member_status_t status,
return;
}
wsp::process p(cmd_ptr, "r");
wsp::process p(cmd_ptr, "r", NULL);
p.wait();
int err = p.error();

188
sql/wsrep_sst.cc
View File

@ -270,12 +270,14 @@ void wsrep_sst_continue ()
struct sst_thread_arg
{
const char* cmd;
int err;
char** env;
char* ret_str;
int err;
mysql_mutex_t lock;
mysql_cond_t cond;
sst_thread_arg (const char* c) : cmd(c), err(-1), ret_str(0)
sst_thread_arg (const char* c, char** e)
: cmd(c), env(e), ret_str(0), err(-1)
{
mysql_mutex_init(key_LOCK_wsrep_sst_thread, &lock, MY_MUTEX_INIT_FAST);
mysql_cond_init(key_COND_wsrep_sst_thread, &cond, NULL);
@ -333,7 +335,7 @@ static void* sst_joiner_thread (void* a)
WSREP_INFO("Running: '%s'", arg->cmd);
wsp::process proc (arg->cmd, "r");
wsp::process proc (arg->cmd, "r", arg->env);
if (proc.pipe() && !proc.error())
{
@ -407,23 +409,54 @@ static void* sst_joiner_thread (void* a)
return NULL;
}
#define WSREP_SST_AUTH_ENV "WSREP_SST_OPT_AUTH"
static int sst_append_auth_env(wsp::env& env, const char* sst_auth)
{
int const sst_auth_size= strlen(WSREP_SST_AUTH_ENV) + 1 /* = */
+ (sst_auth ? strlen(sst_auth) : 0) + 1 /* \0 */;
wsp::string sst_auth_str(sst_auth_size); // for automatic cleanup on return
if (!sst_auth_str()) return -ENOMEM;
int ret= snprintf(sst_auth_str(), sst_auth_size, "%s=%s",
WSREP_SST_AUTH_ENV, sst_auth ? sst_auth : "");
if (ret < 0 || ret >= sst_auth_size)
{
WSREP_ERROR("sst_append_auth_env(): snprintf() failed: %d", ret);
return (ret < 0 ? ret : -EMSGSIZE);
}
env.append(sst_auth_str());
return -env.error();
}
static ssize_t sst_prepare_other (const char* method,
const char* sst_auth,
const char* addr_in,
const char** addr_out)
{
char cmd_str[1024];
const char* sst_dir= mysql_real_data_home;
int const cmd_len= 4096;
wsp::string cmd_str(cmd_len);
int ret= snprintf (cmd_str, sizeof(cmd_str),
if (!cmd_str())
{
WSREP_ERROR("sst_prepare_other(): could not allocate cmd buffer of %d bytes",
cmd_len);
return -ENOMEM;
}
int ret= snprintf (cmd_str(), cmd_len,
"wsrep_sst_%s "
WSREP_SST_OPT_ROLE" 'joiner' "
WSREP_SST_OPT_ADDR" '%s' "
WSREP_SST_OPT_AUTH" '%s' "
WSREP_SST_OPT_DATA" '%s' "
WSREP_SST_OPT_CONF" '%s' "
WSREP_SST_OPT_PARENT" '%d'",
method, addr_in, (sst_auth_real) ? sst_auth_real : "",
sst_dir, wsrep_defaults_file, (int)getpid());
method, addr_in,
mysql_real_data_home,
wsrep_defaults_file, (int)getpid());
if (ret < 0 || ret >= (int)sizeof(cmd_str))
{
@ -431,8 +464,21 @@ static ssize_t sst_prepare_other (const char* method,
return (ret < 0 ? ret : -EMSGSIZE);
}
wsp::env env(NULL);
if (env.error())
{
WSREP_ERROR("sst_prepare_other(): env. var ctor failed: %d", -env.error());
return -env.error();
}
if ((ret= sst_append_auth_env(env, sst_auth)))
{
WSREP_ERROR("sst_prepare_other(): appending auth failed: %d", ret);
return ret;
}
pthread_t tmp;
sst_thread_arg arg(cmd_str);
sst_thread_arg arg(cmd_str(), env());
mysql_mutex_lock (&arg.lock);
ret = pthread_create (&tmp, NULL, sst_joiner_thread, &arg);
if (ret)
@ -582,7 +628,8 @@ ssize_t wsrep_sst_prepare (void** msg)
return 0;
}
addr_len = sst_prepare_other (wsrep_sst_method, addr_in, &addr_out);
addr_len = sst_prepare_other (wsrep_sst_method, sst_auth_real,
addr_in, &addr_out);
if (addr_len < 0)
{
WSREP_ERROR("Failed to prepare for '%s' SST. Unrecoverable.",
@ -615,13 +662,13 @@ ssize_t wsrep_sst_prepare (void** msg)
}
// helper method for donors
static int sst_run_shell (const char* cmd_str, int max_tries)
static int sst_run_shell (const char* cmd_str, char** env, int max_tries)
{
int ret = 0;
for (int tries=1; tries <= max_tries; tries++)
{
wsp::process proc (cmd_str, "r");
wsp::process proc (cmd_str, "r", env);
if (NULL != proc.pipe())
{
@ -651,17 +698,12 @@ static void sst_reject_queries(my_bool close_conn)
if (TRUE == close_conn) wsrep_close_client_connections(FALSE);
}
static int sst_mysqldump_check_addr (const char* user, const char* pswd,
const char* host, const char* port)
{
return 0;
}
static int sst_donate_mysqldump (const char* addr,
const wsrep_uuid_t* uuid,
const char* uuid_str,
wsrep_seqno_t seqno,
bool bypass)
bool bypass,
char** env) // carries auth info
{
size_t host_len;
const char* port = strchr (addr, ':');
@ -682,54 +724,42 @@ static int sst_donate_mysqldump (const char* addr,
strncpy (host, addr, host_len - 1);
host[host_len - 1] = '\0';
const char* auth = sst_auth_real;
const char* pswd = (auth) ? strchr (auth, ':') : NULL;
size_t user_len;
int const cmd_len= 4096;
wsp::string cmd_str(cmd_len);
if (pswd)
if (!cmd_str())
{
pswd += 1;
user_len = pswd - auth;
}
else
{
pswd = "";
user_len = (auth) ? strlen (auth) + 1 : 1;
WSREP_ERROR("sst_donate_mysqldump(): "
"could not allocate cmd buffer of %d bytes", cmd_len);
return -ENOMEM;
}
char *user= (char *) alloca(user_len);
if (!bypass && wsrep_sst_donor_rejects_queries) sst_reject_queries(TRUE);
strncpy (user, (auth) ? auth : "", user_len - 1);
user[user_len - 1] = '\0';
int ret= snprintf (cmd_str(), cmd_len,
"wsrep_sst_mysqldump "
WSREP_SST_OPT_HOST" '%s' "
WSREP_SST_OPT_PORT" '%s' "
WSREP_SST_OPT_LPORT" '%u' "
WSREP_SST_OPT_SOCKET" '%s' "
WSREP_SST_OPT_DATA" '%s' "
WSREP_SST_OPT_CONF" '%s' "
WSREP_SST_OPT_GTID" '%s:%lld'"
"%s",
host, port, mysqld_port, mysqld_unix_port,
mysql_real_data_home, wsrep_defaults_file, uuid_str,
(long long)seqno, bypass ? " "WSREP_SST_OPT_BYPASS : "");
int ret = sst_mysqldump_check_addr (user, pswd, host, port);
if (!ret)
if (ret < 0 || ret >= cmd_len)
{
char cmd_str[1024];
if (!bypass && wsrep_sst_donor_rejects_queries) sst_reject_queries(TRUE);
snprintf (cmd_str, sizeof(cmd_str),
"wsrep_sst_mysqldump "
WSREP_SST_OPT_USER" '%s' "
WSREP_SST_OPT_PSWD" '%s' "
WSREP_SST_OPT_HOST" '%s' "
WSREP_SST_OPT_PORT" '%s' "
WSREP_SST_OPT_LPORT" '%u' "
WSREP_SST_OPT_SOCKET" '%s' "
WSREP_SST_OPT_DATA" '%s' "
WSREP_SST_OPT_CONF" '%s' "
WSREP_SST_OPT_GTID" '%s:%lld'"
"%s",
user, pswd, host, port, mysqld_port, mysqld_unix_port,
mysql_real_data_home, wsrep_defaults_file, uuid_str,
(long long)seqno, bypass ? " "WSREP_SST_OPT_BYPASS : "");
WSREP_DEBUG("Running: '%s'", cmd_str);
ret= sst_run_shell (cmd_str, 3);
WSREP_ERROR("sst_donate_mysqldump(): snprintf() failed: %d", ret);
return (ret < 0 ? ret : -EMSGSIZE);
}
WSREP_DEBUG("Running: '%s'", cmd_str());
ret= sst_run_shell (cmd_str(), env, 3);
wsrep_gtid_t const state_id = { *uuid, (ret ? WSREP_SEQNO_UNDEFINED : seqno)};
wsrep->sst_sent (wsrep, &state_id, ret);
@ -883,7 +913,7 @@ static void* sst_donor_thread (void* a)
wsp::thd thd(FALSE); // we turn off wsrep_on for this THD so that it can
// operate with wsrep_ready == OFF
wsp::process proc(arg->cmd, "r");
wsp::process proc(arg->cmd, "r", arg->env);
err= proc.error();
@ -968,21 +998,29 @@ static int sst_donate_other (const char* method,
const char* addr,
const char* uuid,
wsrep_seqno_t seqno,
bool bypass)
bool bypass,
char** env) // carries auth info
{
char cmd_str[4096];
int const cmd_len= 4096;
wsp::string cmd_str(cmd_len);
int ret= snprintf (cmd_str, sizeof(cmd_str),
if (!cmd_str())
{
WSREP_ERROR("sst_donate_other(): "
"could not allocate cmd buffer of %d bytes", cmd_len);
return -ENOMEM;
}
int ret= snprintf (cmd_str(), cmd_len,
"wsrep_sst_%s "
WSREP_SST_OPT_ROLE" 'donor' "
WSREP_SST_OPT_ADDR" '%s' "
WSREP_SST_OPT_AUTH" '%s' "
WSREP_SST_OPT_SOCKET" '%s' "
WSREP_SST_OPT_DATA" '%s' "
WSREP_SST_OPT_CONF" '%s' "
WSREP_SST_OPT_GTID" '%s:%lld'"
"%s",
method, addr, sst_auth_real, mysqld_unix_port,
method, addr, mysqld_unix_port,
mysql_real_data_home, wsrep_defaults_file,
uuid, (long long) seqno,
bypass ? " "WSREP_SST_OPT_BYPASS : "");
@ -996,7 +1034,7 @@ static int sst_donate_other (const char* method,
if (!bypass && wsrep_sst_donor_rejects_queries) sst_reject_queries(FALSE);
pthread_t tmp;
sst_thread_arg arg(cmd_str);
sst_thread_arg arg(cmd_str(), env);
mysql_mutex_lock (&arg.lock);
ret = pthread_create (&tmp, NULL, sst_donor_thread, &arg);
if (ret)
@ -1029,15 +1067,29 @@ wsrep_cb_status_t wsrep_sst_donate_cb (void* app_ctx, void* recv_ctx,
char uuid_str[37];
wsrep_uuid_print (&current_gtid->uuid, uuid_str, sizeof(uuid_str));
wsp::env env(NULL);
if (env.error())
{
WSREP_ERROR("sst_donate_other(): env var ctor failed: %d", -env.error());
return WSREP_CB_FAILURE;
}
int ret;
if ((ret= sst_append_auth_env(env, sst_auth_real)))
{
WSREP_ERROR("sst_donate_other(): appending auth env failed: %d", ret);
return WSREP_CB_FAILURE;
}
if (!strcmp (WSREP_SST_MYSQLDUMP, method))
{
ret = sst_donate_mysqldump(data, &current_gtid->uuid, uuid_str,
current_gtid->seqno, bypass);
current_gtid->seqno, bypass, env());
}
else
{
ret = sst_donate_other(method, data, uuid_str, current_gtid->seqno,bypass);
ret = sst_donate_other(method, data, uuid_str,
current_gtid->seqno, bypass, env());
}
return (ret > 0 ? WSREP_CB_SUCCESS : WSREP_CB_FAILURE);

94
sql/wsrep_utils.cc
View File

@ -63,7 +63,7 @@ wsrep_prepend_PATH (const char* path)
size_t const new_path_len(strlen(old_path) + strlen(":") +
strlen(path) + 1);
char* const new_path (reinterpret_cast<char*>(malloc(new_path_len)));
char* const new_path (static_cast<char*>(malloc(new_path_len)));
if (new_path)
{
@ -89,6 +89,91 @@ wsrep_prepend_PATH (const char* path)
namespace wsp
{
bool
env::ctor_common(char** e)
{
env_ = static_cast<char**>(malloc((len_ + 1) * sizeof(char*)));
if (env_)
{
for (size_t i(0); i < len_; ++i)
{
assert(e[i]); // caller should make sure about len_
env_[i] = strdup(e[i]);
if (!env_[i])
{
errno_ = errno;
WSREP_ERROR("Failed to allocate env. var: %s", e[i]);
return true;
}
}
env_[len_] = NULL;
return false;
}
else
{
errno_ = errno;
WSREP_ERROR("Failed to allocate env. var vector of length: %zu", len_);
return true;
}
}
void
env::dtor()
{
if (env_)
{
/* don't need to go beyond the first NULL */
for (size_t i(0); env_[i] != NULL; ++i) { free(env_[i]); }
free(env_);
env_ = NULL;
}
len_ = 0;
}
env::env(char** e)
: len_(0), env_(NULL), errno_(0)
{
if (!e) { e = environ; }
/* count the size of the vector */
while (e[len_]) { ++len_; }
if (ctor_common(e)) dtor();
}
env::env(const env& e)
: len_(e.len_), env_(0), errno_(0)
{
if (ctor_common(e.env_)) dtor();
}
env::~env() { dtor(); }
int
env::append(const char* val)
{
char** tmp = static_cast<char**>(realloc(env_, (len_ + 2)*sizeof(char*)));
if (tmp)
{
env_ = tmp;
env_[len_] = strdup(val);
if (env_[len_])
{
++len_;
env_[len_] = NULL;
}
}
/* if either realloc() or strdup() failed, errno had been set */
errno_ = errno;
return errno_;
}
#define PIPE_READ 0
#define PIPE_WRITE 1
#define STDIN_FD 0
@ -98,7 +183,7 @@ namespace wsp
# define POSIX_SPAWN_USEVFORK 0
#endif
process::process (const char* cmd, const char* type)
process::process (const char* cmd, const char* type, char** env)
: str_(cmd ? strdup(cmd) : strdup("")), io_(NULL), err_(EINVAL), pid_(0)
{
if (0 == str_)
@ -120,6 +205,8 @@ process::process (const char* cmd, const char* type)
return;
}
if (NULL == env) { env = environ; } // default to global environment
int pipe_fds[2] = { -1, };
if (::pipe(pipe_fds))
{
@ -215,7 +302,7 @@ process::process (const char* cmd, const char* type)
goto cleanup_fact;
}
err_ = posix_spawnp (&pid_, pargv[0], &fact, &attr, pargv, environ);
err_ = posix_spawnp (&pid_, pargv[0], &fact, &attr, pargv, env);
if (err_)
{
WSREP_ERROR ("posix_spawnp(%s) failed: %d (%s)",
@ -309,6 +396,7 @@ process::wait ()
{
case 126: err_ = EACCES; break; /* Permission denied */
case 127: err_ = ENOENT; break; /* No such file or directory */
case 143: err_ = EINTR; break; /* Subprocess killed */
}
WSREP_ERROR("Process completed with error: %s: %d (%s)",
str_, err_, strerror(err_));

24
sql/wsrep_utils.h
View File

@ -44,6 +44,25 @@ private:
extern wsp::node_status local_status;
namespace wsp {
/* a class to manage env vars array */
class env
{
private:
size_t len_;
char** env_;
int errno_;
bool ctor_common(char** e);
void dtor();
env& operator =(env);
public:
explicit env(char** env);
explicit env(const env&);
~env();
int append(const char* var); /* add a new env. var */
int error() const { return errno_; }
char** operator()() { return env_; }
};
/* A small class to run external programs. */
class process
{
@ -56,8 +75,9 @@ private:
public:
/*! @arg type is a pointer to a null-terminated string which must contain
either the letter 'r' for reading or the letter 'w' for writing.
@arg env optional null-terminated vector of environment variables
*/
process (const char* cmd, const char* type);
process (const char* cmd, const char* type, char** env);
~process ();
FILE* pipe () { return io_; }
@ -90,6 +110,8 @@ class string
{
public:
string() : string_(0) {}
explicit string(size_t s) : string_(static_cast<char*>(malloc(s))) {}
char* operator()() { return string_; }
void set(char* str) { if (string_) free (string_); string_ = str; }
~string() { set (0); }
private: