I am new to C++ programming under Windows. I am trying to execute a command say cuobjdump in C++ code using the system() function:
system("C:\\program files\\nvidia gpu computing...\\cuobjdump.exe --dump-cubin C:\\..\\input.exe");
output:
Usage : cuobjdump [options] <file>
This followed by the list of the options for cuobjdump.
When I execute this program I always get the cuobjdump help options displayed in the command line. It's as if the system call does not parse the filename. What am I doing wrong? I get the same result while using createprocess. The options --dump-cubin gives an error as if I mistyped it.
Give a try with (that is, surrounding cuobjdump.exe path with ", properly escaped in C++ as \"):
system("\"C:\\program files\\nvidia gpu computing...\\cuobjdump.exe\" --dump-cubin C:\\..\\input.exe");
system("cuobjdump --dump-cubin path\filename.exe");
That \f is interpreted by the compiler as a string escape sequence, try path\\filename.exe
Most obviously, \ is an escape character in C / C++ strings, so it has to be doubled if you want to use it literally.
system("cuobjdump --dump-cubin path\\filename.exe");
Assuming that path is correct, you have to use a double \\ within strings to represent a single \.
I suggest you to use CreateProcess, or ShellExecute / ShellExecuteEx since you are working on Windows. system and ShellExecute eventually calls CreateProcess only.
Related
Is it possible to replace a character in terminal with another character by changing format of print command or at least clear a line in terminal?
It is not possible in standard Fortran. Perhaps try using the GNU Readline library. Related: Autocomplete from directory in Fortran
If you do not use the Windows terminal you can use the ANSI escape codes. For example, this first prints the stars, than moves back to the same line and writes "test" over the stars:
print *, "***********"
print *,achar(27)//"[2A"
print *,"test"
end
Tested on a Linux terminal, will not work in the basic Windows terminal.
I have a c++ program that run a command and pass some arguments to it. The code is as follow:
int RunApplication(fs::path applicationPathName,std::string arguments)
{
std::string applicationShortPath=GetShortFileName(applicationPathName);
std::string cmd="\""+applicationShortPath +"\" "+ arguments+" >>log.txt 2>&1 \"";
std::cout<<cmd<<std::endl;
int result=std::system(cmd.c_str());
return result;
}
When I run system command, the cmd window appears shortly and then closes, but the result is 1 and the cmd was not run (the command should generate output which is not generated).
To check that the cmd is correct, I stopped the application just before system line and copy/ paste cmd content to a cmd window and it worked.
I am wondering how can I find why application is not run in system()?
the cmd has this value just before running it:
"D:/DEVELO~3/x64/Debug/enfuse.exe" -w --hard-mask --exposure-weight=1 --saturation-weight=0.328 --contrast-weight=0.164 -o "C:/Users/m/AppData/Local/Temp/1.tif" "C:/Users/m/AppData/Local/Temp/1.jpg" "C:/Users/m/AppData/Local/Temp/2.jpg" >>log.txt 2>&1 "
How can I find why it is not working?
Is there any way that I set the system so it doesn't close cmd window so I can inspect it?
is there any better way to run a command on OS?
Does Boost has any solution for this?
Edit
After running it with cmd /k, I get this error message:
The input line is too long.
How can I fix it other than reducing cmd line?
There are two different things here: if you have to start a suprocess, "system" is not the best way of doing it (better to use the proper API, like CreateProcess, or a multiplatform wrapper, but avoid to go through the command interpreter, to avoid to open to potential malware injection).
But in this case system() is probably the right way to go since you in fact need the command interpreter (you cannot manage things like >>log.txt 2>&1 with only a process creation.)
The problem looks like a failure in the called program: may be the path is not correct or some of the files it has to work with are not existent or accessible with appropriate-permission and so on.
One of the firt thing to do: open a command prompt and paste the string you posted, in there. Does it run? Does it say something about any error?
Another thing to check is how escape sequence are used in C++ literals: to get a '\', you need '\\' since the first is the escape for the second (like \n, or \t etc.). Although it seems not the case, here, it is one of the most common mistakes.
Use cmd /k to keep the terminal: http://ss64.com/nt/cmd.html
Or just spawn cmd.exe instead and inspect the environment, permissions, etc. You can manually paste that command to see whether it would work from that shell. If it does, you know that paths, permssions and environment are ok, so you have some other issue on your hands (argument escaping, character encoding issues)
Check here How to execute a command and get output of command within C++ using POSIX?
Boost.Process is not official yet http://www.highscore.de/boost/process/
I need to cut&paste a folder into another folder through code in C++. But some directory names are problematic, such as the ones which have japanese symbols. However, the same commands introduced through cmd all work fine.
system("move dirName dirName2"); //work
system("move ディレクトリ dirName2"); //does not work (system cannot find the specified file)
system("move ディレクトリ.txt dirName2"); //work
Funny enough, if the item which has the japanese symbols is a file and not a folder, the operation works fine even using calls to system().
I have no idea why the second call to system() does not work or how to solve it.
PS: I'm working with Windows7.
"move dirName dirName2", it is a const char* type, while the Japanese chars are not ASII chars, you should use the unicode API here, try:
_wsystem(L"move ディレクトリ dirName2")
It is likely that you need to use _wsystem instead to accomodate the wide characters. See the relevant MSDN pagefor details, but the syntax of the call is the same.
I am getting the following error when using the system() call to run a batch file:
'C:\newfldr\mybatchfiles.bat' is not recognized as internal or external command, operable program or batch file.
error at : system("C:\newfldr\mybatchfiles.bat");
Can anyone explain why?
You very probably should write your string correctly, eg:
system("C:\\newfldr\\mybatchfile.bat");
Remember that the C compiler is interpreting back slash escapes in constant string literals. In particular \n is a newline character, and \\ encodes a backslash.
You could have printed your command string for debugging to find the issue (or use a debugger).
BTW, on Linux you don't have that issue because \ is rarely used in file paths. Did you consider trying Linux? (it is fun).
I am trying to execute a dos command from within my C++ program, however soon as I add quotes to the output filepath (of a redirection) the command no longer gets executed and returns instantly. I've shown an example below of a path without spaces, but since paths may have spaces and thus be quoted for the shell to understand it properly I need to solve this dilemma - and I'm trying to get the simplest case working first.
i.e.
The following WORKS:
sprintf(exec_cmd,"\"C:/MySQL Server 5.5/bin/mysqldump.exe\" -u%s -p%s %s > C:/backup.bak",user,password,db_name);
system(exec_cmd);
The following does NOT work (notice the quotes around the output):
sprintf(exec_cmd,"\"C:/MySQL Server 5.5/bin/mysqldump.exe\" -u%s -p%s %s > \"C:/backup.bak\"",user,password,db_name);
system(exec_cmd);
I'm guessing it is choking somewhere. I've tried the same "exec_cmd" in popen to no avail.
Any help/advice is greatly appreciated.
I don't think your shell (cmd.exe) allows redirection to a file name with spaces. I couldn't make my command.com from DOS 6.22 accept it (I don't have a cmd.exe nearby to test).
Anyway, you can use the --result-file option to pass the redirection to the command itself.
mysqldump ... --result-file="file name" ...