xenial (3) explain_getgrent_or_die.3.gz

NAME

       explain_getgrent_or_die - get group file entry and report errors

SYNOPSIS

       #include <libexplain/getgrent.h>
       struct group *explain_getgrent_or_die(void);
       struct group *explain_getgrent_on_error(void);

DESCRIPTION

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

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

RETURN VALUE

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

       The explain_getgrent_on_error function always returns the value return by the wrapped getgrent(3)  system
       call.

EXAMPLE

       The  explain_getgrent_or_die  function  is  intended  to  be  used  in a fashion similar to the following
       example:
              struct group *result = explain_getgrent_or_die();

SEE ALSO

       getgrent(3)
               get group file entry

       explain_getgrent(3)
               explain getgrent(3) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2013 Peter Miller

                                                                                      explain_getgrent_or_die(3)