C/C++ - executable path - c++

Question

I want to get the current executable's file path without the executable name at the end.
I'm using:
char path[1024];
uint32_t size = sizeof(path);
if (_NSGetExecutablePath(path, &size) == 0)
printf("executable path is %s\n", path);
else
printf("buffer too small; need size %u\n", size);
It works, but this adds the executable name at the end.

Answer 1

dirname(path);
should return path without executable after you acquire path with, that is on Unix systems, for windows you can do some strcpy/strcat magic.
For dirname you need to include #include <libgen.h>...

Answer 2

Best solution for Ubuntu!!
std::string getpath() {
char buf[PATH_MAX + 1];
if (readlink("/proc/self/exe", buf, sizeof(buf) - 1) == -1)
throw std::string("readlink() failed");
std::string str(buf);
return str.substr(0, str.rfind('/'));
}
int main() {
std::cout << "This program resides in " << getpath() << std::endl;
return 0;
}

Answer 3

Use dirname.

Answer 4

char* program_name = dirname(path);

Answer 5

For Linux:
Function to execute system command
int syscommand(string aCommand, string & result) {
FILE * f;
if ( !(f = popen( aCommand.c_str(), "r" )) ) {
cout << "Can not open file" << endl;
return NEGATIVE_ANSWER;
}
const int BUFSIZE = 4096;
char buf[ BUFSIZE ];
if (fgets(buf,BUFSIZE,f)!=NULL) {
result = buf;
}
pclose( f );
return POSITIVE_ANSWER;
}
Then we get app name
string getBundleName () {
pid_t procpid = getpid();
stringstream toCom;
toCom << "cat /proc/" << procpid << "/comm";
string fRes="";
syscommand(toCom.str(),fRes);
size_t last_pos = fRes.find_last_not_of(" \n\r\t") + 1;
if (last_pos != string::npos) {
fRes.erase(last_pos);
}
return fRes;
}
Then we extract application path
string getBundlePath () {
pid_t procpid = getpid();
string appName = getBundleName();
stringstream command;
command << "readlink /proc/" << procpid << "/exe | sed \"s/\\(\\/" << appName << "\\)$//\"";
string fRes;
syscommand(command.str(),fRes);
return fRes;
}
Do not forget to trim the line after