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NAME

       explain_getgroups_or_die  -  get  supplementary  group  IDs  and report
       errors

SYNOPSIS

       #include <libexplain/getgroups.h>
       void explain_getgroups_or_die(int data_size, gid_t *data);
       int explain_getgroups_on_error(int data_size, gid_t *data);

DESCRIPTION

       The explain_getgroups_or_die function is used to call the  getgroups(2)
       system  call.  On  failure  an  explanation  will be printed to stderr,
       obtained from the explain_getgroups(3) function, and then  the  process
       terminates by calling exit(EXIT_FAILURE).

       The   explain_getgroups_on_error   function   is   used   to  call  the
       getgroups(2) system call. On failure an explanation will be printed  to
       stderr,  obtained  from  the  explain_getgroups(3)  function, but still
       returns to the caller.

       data_size
               The data_size, exactly as to  be  passed  to  the  getgroups(2)
               system call.

       data    The  data,  exactly  as to be passed to the getgroups(2) system
               call.

RETURN VALUE

       The explain_getgroups_or_die function  only  returns  on  success,  see
       getgroups(2)  for  more  information. On failure, prints an explanation
       and exits, it does not return.

       The explain_getgroups_on_error function always returns the value return
       by the wrapped getgroups(2) system call.

EXAMPLE

       The  explain_getgroups_or_die  function  is  intended  to  be used in a
       fashion similar to the following example:
              explain_getgroups_or_die(data_size, data);

SEE ALSO

       getgroups(2)
               get/set list of supplementary group IDs

       explain_getgroups(3)
               explain getgroups(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 0.19
       Copyright (C) 2009 Peter Miller

                                                   explain_getgroups_or_die(3)