Re: getting login name in 4GL

Mike Segel wrote: > > Kevin Franden wrote: > > > The best way (IMHO) to address this issue is to do somthing like: > > > > #include <pwd.h> > > . > > . > > . > > { > > struct passwd *pw; > > > > pw=getpwuid(getuid()); /* fetch the passwd entry */ > > > > /* now, pw->pw_name contains what USER and/or LOGNAME should */ > > } > > > > Pretty simple. Hope this helps. > > Like I posted before, this will return the user which matched the > effective UID. > This does not necessarily match USER or LOGNAME. LOGNAME should be a > read only > variable. THis is true for AIX(4.13) and HP-UX (9.04 and above). THIS IS > NOT TRUE > FOR SOLARIS 2.4. > > A user can change the values of the USER and in Sun's case LOGNAME. > Also, if a user runs a program with the *sticky* bit set, then execs > your Informix > app, this will return the owner of the program exec'ing the app. Or if > the > app does a setuid (root owned and sticky bit set.) then it will return > the user name > the setuid performed. > > What INFORMIX does, is when an application is started, it checks the > USER Name by > getting the EUID or UID from the front end application. (In client > server, the > front end app must supply this info.) The data is stored in a pseudo > field called > user. (Sort of a *global* variable.) [Is there an official name for > this?]. > If you query for user on any table, it will supply you with the value > stored in this > *global* field. Most users tend to choose a system table since it will > *always* > exist. Again this value will contain the user name of the UID executing > the front end. > > -Mikey