On 12/24/2016 01:19 AM, Wietse Venema wrote: > John Fawcett: >>>> "On success, *getpwnam_r*() and *getpwuid_r*() return zero, and set >>>> /*result/ to /pwd/. If no matching password record was found, these >>>> functions return 0 and store NULL in /*result/. In case of error, an >>>> error number is returned, and NULL is stored in /*result/. " > A zero result value mans that no error occurred; we know for certain > that the user exists or does not exist. > > That's almost consistent with, for example, the XOPEN standard: \ > > The getpwnam_r() function shall return zero on success or if > the requested entry was not found AND NO ERROR HAS OCCURRED. > If an error has occurred, an error number shall be returned to > indicate the error. > > What bugs me is the text that follows later in that same Linux > manpage: > > ERRORS > > 0 or ENOENT or ESRCH or EBADF or EPERM or ... > The given name or uid was not found. > > This text makes no sense. It is in conflict with XOPEN, and with > the other quote from the Linux manpage. > > Wietse > Yes, at first I read the text under ERRORS as though it was part of the standard, but then I realized that it is just stating what some implementations do in practice (which is what makes no sense).
John
