Hello, I'm writing program in C++ (for XAMPP communication) and I want to execute command which I have in strings (I know that this is simply system("command")) but I want to get the output from bash to C++ to string. I've founded several threads about this, but no which solved Bash -> C++.
+2
A:
You need to call the popen function, and read the output from the FILE it returns.
Martin v. Löwis
2009-10-04 18:48:44
+1
A:
You can try Standard Output Redirection to redirect the standard output to a file stream and then use it to read to a string.
Baget
2009-10-04 18:50:38
Indeed, if the C++ program reads stdin then you can issue a cammand like: bash_command | cppProgram | string
Deverill
2009-10-04 19:59:34
+3
A:
You can call the FILE *popen(const char *command, const char *mode) function. Then, you can read the file it returns to get the output of your call.
It's like using a pipe to redirect the output of the command you used to a file in the hard drive and then read the file, but you don't get to create a file in the hard drive.
jpmelos
2009-10-04 18:56:32
A:
Ok, any more ideas? Any popen looks good, but any way to do this without files? I must read manpage for dup.
Garret Raziel
2009-10-04 19:22:31
The FILE* popen returns is not (necessarily) a real file and usually does not end up written to disk ever. (With large output this is not necessarily true.) FILE* is just an interface into a file-like device. When FILE* is created with fopen, it points to a real file on disk. When created with popen, there usually isn't a real file on disk.
jmucchiello
2009-10-04 20:18:52