I have an application that uses the following piece of code to run a cmd and get its output:
std::string cmd = "ps -a -x -o pid,ppid,state,command | grep myProcess | grep -v 'grep' | awk '{ print $1, $2, $3 }'";
char buf[BUF_SIZE];
std::stringstream output;
std::string err;
int exitCode;
FILE* proc = popen(cmd.c_str(), "r");
if (proc == NULL) {
exit(1);
}
while (fgets(buf, BUF_SIZE, proc) != NULL) {
output << buf;
}
exitCode = pclose(proc);
std::string outputStr = output.str();
The problem I am having is that the function would get stuck on the fgets function randomly. I cannot consistently make it to get stuck.
How can that happen?
The code is running under macOS 10.10 and upwards.
