NAME

       explain_getgrouplist_or_die - get list of groups and report errors

SYNOPSIS

       #include <libexplain/getgrouplist.h>
       void  explain_getgrouplist_or_die(const  char  *user,  gid_t  group,  gid_t  *groups,  int
       *ngroups);
       int explain_getgrouplist_on_error(const  char  *user,  gid_t  group,  gid_t  *groups,  int
       *ngroups);

DESCRIPTION

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

       The explain_getgrouplist_on_error function is used  to  call  the  getgrouplist(3)  system
       call.   On   failure  an  explanation  will  be  printed  to  stderr,  obtained  from  the
       explain_getgrouplist(3) function, but still returns to the caller.

       user    The user, exactly as to be passed to the getgrouplist(3) system call.

       group   The group, exactly as to be passed to the getgrouplist(3) system call.

       groups  The groups, exactly as to be passed to the getgrouplist(3) system call.

       ngroups The ngroups, exactly as to be passed to the getgrouplist(3) system call.

RETURN VALUE

       The explain_getgrouplist_or_die function only returns on success, see getgrouplist(3)  for
       more information. On failure, prints an explanation and exits, it does not return.

       The  explain_getgrouplist_on_error function always returns the value return by the wrapped
       getgrouplist(3) system call.

EXAMPLE

       The explain_getgrouplist_or_die function is intended to be used in a  fashion  similar  to
       the following example:
              explain_getgrouplist_or_die(user, group, groups, ngroups);

SEE ALSO

       getgrouplist(3)
               get list of groups to which a user belongs

       explain_getgrouplist(3)
               explain getgrouplist(3) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2013 Peter Miller

                                                                   explain_getgrouplist_or_die(3)