NAME

       explain_getresgid_or_die - get r/e/s group IDs and report errors

SYNOPSIS

       #include <libexplain/getresgid.h>
       void explain_getresgid_or_die(gid_t *rgid, gid_t *egid, gid_t *sgid);
       int explain_getresgid_on_error(gid_t *rgid, gid_t *egid, gid_t *sgid);

DESCRIPTION

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

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

       rgid    The rgid, exactly as to be passed to the getresgid(2) system call.

       egid    The egid, exactly as to be passed to the getresgid(2) system call.

       sgid    The sgid, exactly as to be passed to the getresgid(2) system call.

RETURN VALUE

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

       The explain_getresgid_on_error function always returns the value  return  by  the  wrapped
       getresgid(2) system call.

EXAMPLE

       The  explain_getresgid_or_die  function is intended to be used in a fashion similar to the
       following example:
              explain_getresgid_or_die(rgid, egid, sgid);

SEE ALSO

       getresgid(2)
               get real, effective and saved group IDs

       explain_getresgid(3)
               explain getresgid(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2012 Peter Miller

                                                                      explain_getresgid_or_die(3)