X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;f=libtest%2Fcmdline.cc;h=5c3d09f2960487a8169d9b57ab807aa681193120;hb=3db2fad1ae84c7235507bf1adf471461856ddee4;hp=efe03040e5088f1742ba95059830433ba077b305;hpb=de7e5645d23b4042a3707654ef27fe6648eba80f;p=awesomized%2Flibmemcached diff --git a/libtest/cmdline.cc b/libtest/cmdline.cc index efe03040..5c3d09f2 100644 --- a/libtest/cmdline.cc +++ b/libtest/cmdline.cc @@ -1,38 +1,63 @@ /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab: - * - * libtest * - * Copyright (C) 2011 Data Differential, http://datadifferential.com/ + * Data Differential YATL (i.e. libtest) library * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 3 of the License, or (at your option) any later version. + * Copyright (C) 2012 Data Differential, http://datadifferential.com/ * - * This library 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 - * Lesser General Public License for more details. + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * + * * The names of its contributors may not be used to endorse or + * promote products derived from this software without specific prior + * written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ +#include #include using namespace libtest; #include #include +#include #include #include #include +#include #include #include #include #include #include +#include + +#include + +#ifndef __USE_GNU +static char **environ= NULL; +#endif extern "C" { static int exited_successfully(int status) @@ -57,29 +82,33 @@ extern "C" { namespace { - std::string print_argv(char * * & built_argv, const size_t& argc) + std::string print_argv(libtest::vchar_ptr_t& built_argv) { std::stringstream arg_buffer; - for (size_t x= 0; x < argc; x++) + for (vchar_ptr_t::iterator iter= built_argv.begin(); + iter == built_argv.end(); + iter++) { - arg_buffer << built_argv[x] << " "; + arg_buffer << *iter << " "; } return arg_buffer.str(); } +#if 0 std::string print_argv(char** argv) { std::stringstream arg_buffer; - for (char** ptr= argv; *ptr; ptr++) + for (char** ptr= argv; *ptr; ++ptr) { arg_buffer << *ptr << " "; } return arg_buffer.str(); } +#endif static Application::error_t int_to_error_t(int arg) { @@ -104,16 +133,20 @@ Application::Application(const std::string& arg, const bool _use_libtool_arg) : _use_libtool(_use_libtool_arg), _use_valgrind(false), _use_gdb(false), + _use_ptrcheck(false), + _will_fail(false), _argc(0), _exectuble(arg), - built_argv(NULL), + stdin_fd(STDIN_FILENO), + stdout_fd(STDOUT_FILENO), + stderr_fd(STDERR_FILENO), _pid(-1) { if (_use_libtool) { if (libtool() == NULL) { - throw "libtool requested, but know libtool was found"; + fatal_message("libtool requested, but know libtool was found"); } } @@ -140,6 +173,7 @@ Application::Application(const std::string& arg, const bool _use_libtool_arg) : Application::~Application() { + murder(); delete_argv(); } @@ -154,9 +188,16 @@ Application::error_t Application::run(const char *args[]) posix_spawn_file_actions_t file_actions; posix_spawn_file_actions_init(&file_actions); - stdin_fd.dup_for_spawn(Application::Pipe::READ, file_actions, STDIN_FILENO); - stdout_fd.dup_for_spawn(Application::Pipe::WRITE, file_actions, STDOUT_FILENO); - stderr_fd.dup_for_spawn(Application::Pipe::WRITE, file_actions, STDERR_FILENO); + stdin_fd.dup_for_spawn(file_actions); + stdout_fd.dup_for_spawn(file_actions); + stderr_fd.dup_for_spawn(file_actions); + + posix_spawnattr_t spawnattr; + posix_spawnattr_init(&spawnattr); + + sigset_t set; + sigemptyset(&set); + fatal_assert(posix_spawnattr_setsigmask(&spawnattr, &set) == 0); create_argv(args); @@ -195,7 +236,7 @@ Application::error_t Application::run(const char *args[]) const_cast(_exectuble_with_path.c_str()), 0}; - spawn_ret= posix_spawnp(&_pid, libtool(), &file_actions, NULL, argv, NULL); + spawn_ret= posix_spawnp(&_pid, libtool(), &file_actions, &spawnattr, argv, environ); } else { @@ -208,104 +249,257 @@ Application::error_t Application::run(const char *args[]) const_cast(gdb_run_file.c_str()), const_cast(_exectuble_with_path.c_str()), 0}; - spawn_ret= posix_spawnp(&_pid, "gdb", &file_actions, NULL, argv, NULL); + spawn_ret= posix_spawnp(&_pid, "gdb", &file_actions, &spawnattr, argv, environ); } } else { + if (_use_libtool) { - spawn_ret= posix_spawn(&_pid, built_argv[0], &file_actions, NULL, built_argv, NULL); + spawn_ret= posix_spawn(&_pid, built_argv[0], &file_actions, &spawnattr, &built_argv[0], NULL); } else { - spawn_ret= posix_spawnp(&_pid, built_argv[0], &file_actions, NULL, built_argv, NULL); + spawn_ret= posix_spawnp(&_pid, built_argv[0], &file_actions, &spawnattr, &built_argv[0], NULL); } } posix_spawn_file_actions_destroy(&file_actions); + posix_spawnattr_destroy(&spawnattr); stdin_fd.close(Application::Pipe::READ); stdout_fd.close(Application::Pipe::WRITE); stderr_fd.close(Application::Pipe::WRITE); - if (spawn_ret) + if (spawn_ret != 0) { + if (_will_fail == false) + { + Error << strerror(spawn_ret) << "(" << spawn_ret << ")"; + } + _pid= -1; return Application::INVALID; } return Application::SUCCESS; } -Application::error_t Application::wait() +bool Application::check() const { - if (_pid == -1) + if (_pid > 1 and kill(_pid, 0) == 0) { - Error << "wait() got an invalid pid_t"; - return Application::INVALID; + return true; } + return false; +} + +void Application::murder() +{ + if (check()) { - ssize_t read_length; - char buffer[1024]= { 0 }; - bool bail= false; - while (((read_length= ::read(stdout_fd.fd()[0], buffer, sizeof(buffer))) != 0) or bail) + int count= 5; + while ((count--) > 0 and check()) { - if (read_length == -1) + int kill_ret= kill(_pid, SIGTERM); + if (kill_ret == 0) { - switch(errno) + int status= 0; + pid_t waitpid_ret; + if ((waitpid_ret= waitpid(_pid, &status, WNOHANG)) == -1) { - case EAGAIN: - continue; + switch (errno) + { + case ECHILD: + case EINTR: + break; + + default: + Error << "waitpid() failed after kill with error of " << strerror(errno); + break; + } + } - default: - Error << strerror(errno); - bail= true; + if (waitpid_ret == 0) + { + libtest::dream(1, 0); } } - _stdout_buffer.reserve(read_length +1); - for (size_t x= 0; x < read_length; x++) + else { - _stdout_buffer.push_back(buffer[x]); + Error << "kill(pid, SIGTERM) failed after kill with error of " << strerror(errno); + continue; } - // @todo Suck up all output code here + + break; + } + + // If for whatever reason it lives, kill it hard + if (check()) + { + (void)kill(_pid, SIGKILL); } } + slurp(); +} +// false means that no data was returned +bool Application::slurp() +{ + struct pollfd fds[2]; + fds[0].fd= stdout_fd.fd(); + fds[0].events= POLLRDNORM; + fds[0].revents= 0; + fds[1].fd= stderr_fd.fd(); + fds[1].events= POLLRDNORM; + fds[1].revents= 0; + + int active_fd; + if ((active_fd= poll(fds, 2, 0)) == -1) { - ssize_t read_length; - char buffer[1024]= { 0 }; - bool bail= false; - while (((read_length= ::read(stderr_fd.fd()[0], buffer, sizeof(buffer))) != 0) or bail) + int error; + switch ((error= errno)) { - if (read_length == -1) +#ifdef TARGET_OS_LINUX + case ERESTART: +#endif + case EINTR: + break; + + case EFAULT: + case ENOMEM: + fatal_message(strerror(error)); + break; + + case EINVAL: + fatal_message("RLIMIT_NOFILE exceeded, or if OSX the timeout value was invalid"); + break; + + default: + fatal_message(strerror(error)); + break; + } + + return false; + } + + if (active_fd == 0) + { + return false; + } + + bool data_was_read= false; + if (fds[0].revents & POLLRDNORM) + { + if (stdout_fd.read(_stdout_buffer) == true) + { + data_was_read= true; + } + } + + if (fds[1].revents & POLLRDNORM) + { + if (stderr_fd.read(_stderr_buffer) == true) + { + data_was_read= true; + } + } + + return data_was_read; +} + +Application::error_t Application::wait(bool nohang) +{ + if (_pid == -1) + { + return Application::INVALID; + } + + slurp(); + + error_t exit_code= FAILURE; + { + int status= 0; + pid_t waited_pid; + if ((waited_pid= waitpid(_pid, &status, nohang ? WNOHANG : 0)) == -1) + { + switch (errno) { - switch(errno) - { - case EAGAIN: - continue; + case ECHILD: + exit_code= Application::SUCCESS; + break; - default: - Error << strerror(errno); - bail= true; - } + case EINTR: + break; + + default: + Error << "Error occured while waitpid(" << strerror(errno) << ") on pid " << int(_pid); + break; } - _stderr_buffer.reserve(read_length +1); - for (size_t x= 0; x < read_length; x++) + } + else if (waited_pid == 0) + { + exit_code= Application::SUCCESS; + } + else + { + if (waited_pid != _pid) { - _stderr_buffer.push_back(buffer[x]); + throw libtest::fatal(LIBYATL_DEFAULT_PARAM, "Pid mismatch, %d != %d", int(waited_pid), int(_pid)); } - // @todo Suck up all errput code here + exit_code= int_to_error_t(exited_successfully(status)); } } + slurp(); + +#if 0 + if (exit_code == Application::INVALID) + { + Error << print_argv(built_argv, _argc); + } +#endif + + return exit_code; +} + +Application::error_t Application::join() +{ + if (_pid == -1) + { + return Application::INVALID; + } + + slurp(); + error_t exit_code= FAILURE; { int status= 0; pid_t waited_pid; - if ((waited_pid= waitpid(_pid, &status, 0)) == -1) + do { + waited_pid= waitpid(_pid, &status, 0); + } while (waited_pid == -1 and (errno == EINTR or errno == EAGAIN)); + + if (waited_pid == -1) + { + switch (errno) + { + case ECHILD: + exit_code= Application::SUCCESS; + break; + + case EINTR: + break; + + default: + Error << "Error occured while waitpid(" << strerror(errno) << ") on pid " << int(_pid); + break; + } + } + else if (waited_pid == 0) { - Error << "Error occured while waitpid(" << strerror(errno) << ") on pid " << int(_pid); + exit_code= Application::SUCCESS; } else { @@ -313,10 +507,13 @@ Application::error_t Application::wait() { throw libtest::fatal(LIBYATL_DEFAULT_PARAM, "Pid mismatch, %d != %d", int(waited_pid), int(_pid)); } + exit_code= int_to_error_t(exited_successfully(status)); } } + slurp(); + #if 0 if (exit_code == Application::INVALID) { @@ -327,6 +524,13 @@ Application::error_t Application::wait() return exit_code; } +void Application::add_long_option(const std::string& name, const std::string& option_value) +{ + std::string arg(name); + arg+= option_value; + _options.push_back(std::make_pair(arg, std::string())); +} + void Application::add_option(const std::string& arg) { _options.push_back(std::make_pair(arg, std::string())); @@ -337,130 +541,176 @@ void Application::add_option(const std::string& name, const std::string& value) _options.push_back(std::make_pair(name, value)); } -Application::Pipe::Pipe() +Application::Pipe::Pipe(int arg) : + _std_fd(arg) { - _fd[0]= -1; - _fd[1]= -1; - _open[0]= false; - _open[1]= false; + _pipe_fd[READ]= -1; + _pipe_fd[WRITE]= -1; + _open[READ]= false; + _open[WRITE]= false; } -void Application::Pipe::reset() +int Application::Pipe::Pipe::fd() { - close(READ); - close(WRITE); - - int ret; - if ((ret= pipe(_fd)) < 0) + if (_std_fd == STDOUT_FILENO) { - throw strerror(ret); + return _pipe_fd[READ]; } - _open[0]= true; - _open[1]= true; + else if (_std_fd == STDERR_FILENO) + { + return _pipe_fd[READ]; + } + + return _pipe_fd[WRITE]; // STDIN_FILENO +} + + +bool Application::Pipe::read(libtest::vchar_t& arg) +{ + fatal_assert(_std_fd == STDOUT_FILENO or _std_fd == STDERR_FILENO); + + bool data_was_read= false; + ssize_t read_length; + char buffer[1024]= { 0 }; + while ((read_length= ::read(_pipe_fd[READ], buffer, sizeof(buffer)))) { - ret= fcntl(_fd[0], F_GETFL, 0); - if (ret == -1) + if (read_length == -1) { - Error << "fcntl(F_GETFL) " << strerror(ret); - throw strerror(ret); + switch(errno) + { + case EAGAIN: + break; + + default: + Error << strerror(errno); + break; + } + + break; } - ret= fcntl(_fd[0], F_SETFL, ret | O_NONBLOCK); - if (ret == -1) + data_was_read= true; + arg.reserve(read_length +1); + for (size_t x= 0; x < size_t(read_length); ++x) { - Error << "fcntl(F_SETFL) " << strerror(ret); - throw strerror(ret); + arg.push_back(buffer[x]); } + // @todo Suck up all errput code here } + + return data_was_read; } -Application::Pipe::~Pipe() +void Application::Pipe::nonblock() { - close(READ); - close(WRITE); + int ret; + if ((ret= fcntl(_pipe_fd[READ], F_GETFL, 0)) == -1) + { + Error << "fcntl(F_GETFL) " << strerror(errno); + throw strerror(errno); + } + + if ((ret= fcntl(_pipe_fd[READ], F_SETFL, ret | O_NONBLOCK)) == -1) + { + Error << "fcntl(F_SETFL) " << strerror(errno); + throw strerror(errno); + } } -void Application::Pipe::dup_for_spawn(const close_t& arg, posix_spawn_file_actions_t& file_actions, const int newfildes) +void Application::Pipe::reset() { - int type= int(arg); + close(READ); + close(WRITE); - int ret; - if ((ret= posix_spawn_file_actions_adddup2(&file_actions, _fd[type], newfildes )) < 0) +#if defined(HAVE_PIPE2) && HAVE_PIPE2 + if (pipe2(_pipe_fd, O_NONBLOCK) == -1) +#else + if (pipe(_pipe_fd) == -1) +#endif { - Error << "posix_spawn_file_actions_adddup2(" << strerror(ret) << ")"; - throw strerror(ret); + fatal_message(strerror(errno)); } + _open[0]= true; + _open[1]= true; - if ((ret= posix_spawn_file_actions_addclose(&file_actions, _fd[type])) < 0) + if (true) { - Error << "posix_spawn_file_actions_adddup2(" << strerror(ret) << ")"; - throw strerror(ret); + nonblock(); + cloexec(); } } -void Application::Pipe::close(const close_t& arg) +void Application::Pipe::cloexec() { - int type= int(arg); + int ret; + if ((ret= fcntl(_pipe_fd[WRITE], F_GETFD, 0)) == -1) + { + Error << "fcntl(F_GETFD) " << strerror(errno); + throw strerror(errno); + } - if (_open[type]) + if ((ret= fcntl(_pipe_fd[WRITE], F_SETFD, ret | FD_CLOEXEC)) == -1) { - int ret; - if ((ret= ::close(_fd[type])) < 0) - { - Error << "close(" << strerror(ret) << ")"; - } - _open[type]= false; + Error << "fcntl(F_SETFD) " << strerror(errno); + throw strerror(errno); } } -void Application::create_argv(const char *args[]) +Application::Pipe::~Pipe() { - _argc= 2 +_use_libtool ? 2 : 0; // +1 for the command, +2 for libtool/mode=execute, +1 for the NULL - - if (_use_libtool) + if (_pipe_fd[0] != -1) { - _argc+= 2; // +2 for libtool --mode=execute + ::close(_pipe_fd[0]); } - /* - valgrind --error-exitcode=1 --leak-check=yes --show-reachable=yes --track-fds=yes --malloc-fill=A5 --free-fill=DE - */ - if (_use_valgrind) + if (_pipe_fd[1] != -1) { - _argc+= 7; + ::close(_pipe_fd[1]); } - else if (_use_gdb) // gdb +} + +void Application::Pipe::dup_for_spawn(posix_spawn_file_actions_t& file_actions) +{ + int type= STDIN_FILENO == _std_fd ? 0 : 1; + + int ret; + if ((ret= posix_spawn_file_actions_adddup2(&file_actions, _pipe_fd[type], _std_fd )) < 0) { - _argc+= 1; + Error << "posix_spawn_file_actions_adddup2(" << strerror(ret) << ")"; + fatal_message(strerror(ret)); } - for (Options::const_iterator iter= _options.begin(); iter != _options.end(); iter++) + if ((ret= posix_spawn_file_actions_addclose(&file_actions, _pipe_fd[type])) < 0) { - _argc++; - if ((*iter).second.empty() == false) - { - _argc++; - } + Error << "posix_spawn_file_actions_adddup2(" << strerror(ret) << ")"; + fatal_message(strerror(ret)); } +} - if (args) +void Application::Pipe::close(const close_t& arg) +{ + int type= int(arg); + + if (_open[type]) { - for (const char **ptr= args; *ptr; ++ptr) + if (::close(_pipe_fd[type]) == -1) { - _argc++; + Error << "close(" << strerror(errno) << ")"; } + _open[type]= false; + _pipe_fd[type]= -1; } +} +void Application::create_argv(const char *args[]) +{ delete_argv(); - built_argv= new char * [_argc]; - - size_t x= 0; if (_use_libtool) { assert(libtool()); - built_argv[x++]= strdup(libtool()); - built_argv[x++]= strdup("--mode=execute"); + built_argv.push_back(strdup(libtool())); + built_argv.push_back(strdup("--mode=execute")); } if (_use_valgrind) @@ -468,27 +718,50 @@ void Application::create_argv(const char *args[]) /* valgrind --error-exitcode=1 --leak-check=yes --show-reachable=yes --track-fds=yes --malloc-fill=A5 --free-fill=DE */ - built_argv[x++]= strdup("valgrind"); - built_argv[x++]= strdup("--error-exitcode=1"); - built_argv[x++]= strdup("--leak-check=yes"); - built_argv[x++]= strdup("--show-reachable=yes"); - built_argv[x++]= strdup("--track-fds=yes"); - built_argv[x++]= strdup("--malloc-fill=A5"); - built_argv[x++]= strdup("--free-fill=DE"); + built_argv.push_back(strdup("valgrind")); + built_argv.push_back(strdup("--error-exitcode=1")); + built_argv.push_back(strdup("--leak-check=yes")); + built_argv.push_back(strdup("--show-reachable=yes")); + built_argv.push_back(strdup("--track-fds=yes")); +#if 0 + built_argv[x++]= strdup("--track-origin=yes"); +#endif + built_argv.push_back(strdup("--malloc-fill=A5")); + built_argv.push_back(strdup("--free-fill=DE")); + + std::string log_file= create_tmpfile("valgrind"); + char buffer[1024]; + int length= snprintf(buffer, sizeof(buffer), "--log-file=%s", log_file.c_str()); + fatal_assert(length > 0 and size_t(length) < sizeof(buffer)); + built_argv.push_back(strdup(buffer)); + } + else if (_use_ptrcheck) + { + /* + valgrind --error-exitcode=1 --tool=exp-ptrcheck --log-file= + */ + built_argv.push_back(strdup("valgrind")); + built_argv.push_back(strdup("--error-exitcode=1")); + built_argv.push_back(strdup("--tool=exp-ptrcheck")); + std::string log_file= create_tmpfile("ptrcheck"); + char buffer[1024]; + int length= snprintf(buffer, sizeof(buffer), "--log-file=%s", log_file.c_str()); + fatal_assert(length > 0 and size_t(length) < sizeof(buffer)); + built_argv.push_back(strdup(buffer)); } else if (_use_gdb) { - built_argv[x++]= strdup("gdb"); + built_argv.push_back(strdup("gdb")); } - built_argv[x++]= strdup(_exectuble_with_path.c_str()); + built_argv.push_back(strdup(_exectuble_with_path.c_str())); - for (Options::const_iterator iter= _options.begin(); iter != _options.end(); iter++) + for (Options::const_iterator iter= _options.begin(); iter != _options.end(); ++iter) { - built_argv[x++]= strdup((*iter).first.c_str()); + built_argv.push_back(strdup((*iter).first.c_str())); if ((*iter).second.empty() == false) { - built_argv[x++]= strdup((*iter).second.c_str()); + built_argv.push_back(strdup((*iter).second.c_str())); } } @@ -496,24 +769,24 @@ void Application::create_argv(const char *args[]) { for (const char **ptr= args; *ptr; ++ptr) { - built_argv[x++]= strdup(*ptr); + built_argv.push_back(strdup(*ptr)); } } - built_argv[_argc -1]= NULL; + built_argv.push_back(NULL); } std::string Application::print() { - return print_argv(built_argv, _argc); + return print_argv(built_argv); } std::string Application::arguments() { std::stringstream arg_buffer; - for (size_t x= 1 + _use_libtool ? 2 : 0; + for (size_t x= (1 +_use_libtool) ? 2 : 0; x < _argc and built_argv[x]; - x++) + ++x) { arg_buffer << built_argv[x] << " "; } @@ -521,22 +794,20 @@ std::string Application::arguments() return arg_buffer.str(); } -void Application::delete_argv() +struct DeleteFromVector { - if (built_argv == NULL) - { - return; - } - - for (size_t x= 0; x < _argc; x++) - { - if (built_argv[x]) + template + void operator() ( T* ptr) const { - ::free(built_argv[x]); + free(ptr); } - } - delete[] built_argv; - built_argv= NULL; +}; + +void Application::delete_argv() +{ + std::for_each(built_argv.begin(), built_argv.end(), DeleteFromVector()); + + built_argv.clear(); _argc= 0; } @@ -552,7 +823,7 @@ int exec_cmdline(const std::string& command, const char *args[], bool use_libtoo return int(ret); } - return int(app.wait()); + return int(app.join()); } const char *gearmand_binary() @@ -560,4 +831,9 @@ const char *gearmand_binary() return GEARMAND_BINARY; } +const char *drizzled_binary() +{ + return DRIZZLED_BINARY; +} + } // namespace exec_cmdline