c++ - Get system username in Qt -



c++ - Get system username in Qt -

is there cross platform way current username in qt c++ program?

i've crawled net , documentation solution, thing find os dependent scheme calls.

i thinking couple of days ago, , came conclusion of having different alternatives, each own trade-off, namely:

environment variables using qgetenv.

the advantage of solution easy implement. drawback if environment variable set else, solution unreliable then.

#include <qstring> #include <qdebug> int main() { qstring name = qgetenv("user"); if (name.isempty()) name = qgetenv("username"); qdebug() << name; homecoming 0; } home location qstandardpaths

the advantage that, relatively easy implement, again, can go unreliable since valid utilize different username , "entry" in user home location.

#include <qstandardpaths> #include <qstringlist> #include <qdebug> #include <qdir> int main() { qstringlist homepath = qstandardpaths::standardlocations(qstandardpaths::homelocation); qdebug() << homepath.first().split(qdir::separator()).last(); homecoming 0; } run external processes , utilize platform specific apis

this hard implement, on other hand, seems reliable cannot changed under application environment variable or home location tricks. on linux, utilize qprocess invoke usual whoami command, , on windows, utilize getusername winapi purpose.

#include <qcoreapplication> #include <qprocess> #include <qdebug> int main(int argc, char **argv) { // strictly pseudo code! #ifdef q_os_win char acusername[max_username]; dword nusername = sizeof(acusername); if (getusername(acusername, &nusername)) qdebug << acusername; homecoming 0; #elif q_os_unix qcoreapplication coreapplication(argc, argv); qprocess process; qobject::connect(&process, &qprocess::finished, [&coreapplication, &process](int exitcode, qprocess::exitstatus exitstatus) { qdebug() << process.readallstandardoutput(); coreapplication.quit(); }); process.start("whoami"); homecoming coreapplication.exec(); #endif }

summary: go lastly variant since, though hard implement, reliable.

c++ qt qtcore

Comments

Post a Comment

Popular posts from this blog

c - Compilation of a code: unkown type name string -

c - Compilation of a code: unkown type name string - i have next lines of code compiler says following: "unknown type name 'string'" both in declaration , definition of function. can tell me what's wrong? thanks. #include <stdio.h> #include <stdlib.h> #include <string.h> void frecognizeclient(string *actualclient) there no string type in c. need utilize array so: char array[10]; then can pass in function: void frecognizeclient(char *actualclient); c arrays string compilation
Read more

java - Bypassing "final local variable defined in an enclosing type" -

java - Bypassing "final local variable defined in an enclosing type" - i'm writing programme , i'm getting "the final local variable asd cannot assigned, since it's defined in enclosing type". i provide illustration not code produces error aswell. have arraylist utilize later (if define within button can't utilize later on), outside of button, pressing button should give values arraylist. in illustration "create new arraylist" cause same problem. button btn = new button("asd"); final arraylist asd = new arraylist(); btn.setonaction(new eventhandler<actionevent>() { public void handle(final actionevent event) { asd = new arraylist(); //here's error.. } }); clear arraylist , add together values. java javafx
Read more

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) -

json - Hibernate and Jackson (java.lang.IllegalStateException: Cannot call sendError() after the response has been committed) - hello have problem hibernate , jackson. have 2 pojos @entity @table(name = "users") public class user implements serializable { static final long serialversionuid = 4235637833262722256l; @id @generatedvalue private int id; @column(name = "creation_date") private date creationdate; @column(name = "first_name") private string firstname; @column(name = "last_name") private string lastname; @version @column(name = "version") private int version; @column(name = "e_mail") private string email; @column(name = "enabled") private boolean enabled; @column(name = "login") private string login; @column(name = "password") private string password; @jsonmanagedreference("role") @onetomany(mappedby = "user", cascade = cascadetype.all,fetch = fetchtyp...
Read more