nerd@percival.UUCP (Michael Galassi) (06/06/88)
Howdy,
I just finished trying to compile the newgetty program recently
posted. I got _rdchk, _defread and _defopen as undefined by ld. I
solved the _rdchk as follows but have no clue as to what the other two
routines are supposed to do. Anyone have a clue for me to go by? As
per usual,
thanks in advance,
-michael
int rdchk(fp)
FILE *fp;
{
int i;
ioctl(fileno(fp), FIONREAD, &i);
return i;
}
--
Michael Galassi | If my opinions happen to be the same as
...!tektronix!tessi!percival!nerd | my employer's it is ONLY a coincidence,
...!uunet!littlei!percival!nerd | of course coincidences DO happen.jfh@rpp386.UUCP (John F. Haugh II) (06/08/88)
In article <1259@percival.UUCP> nerd@percival.UUCP (Michael Galassi) writes: >Howdy, > I just finished trying to compile the newgetty program recently >posted. I got _rdchk, _defread and _defopen as undefined by ld. I >solved the _rdchk as follows but have no clue as to what the other two >routines are supposed to do. Anyone have a clue for me to go by? As >per usual, >thanks in advance, > -michael defopen() and defread() and routines for using defaults files. the idea being that OEM's would want to be able to configure their systems without having to provide sources. using a ``defaults'' file allows different configurations using the same binary. an example of a defaults file for dump(1) might be tape=/dev/rfd0 disk=/dev/rroot for a small pc, and then tape=/dev/rmt/0m disk=/dev/dsk/0s1 for a larger machine using the system v naming convention. the normal convention is for a program named 'xxx' to store its defaults in the file '/etc/default/xxx'. the call to defopen() for that program would be int defopen (char *); defopen ("xxx"); and the call to defread() to determine the tape device would be something like char *defread (char *); char *mytape, *cp; if ((cp = defread ("tape")) == (char *) 0) cp = "/dev/rmt/0m"; strdup (mytape, cp); i seem to recall there is a bug (or was in the Microsoft Xenix version i used to use) with these routines. you may want to write your own. i did once and it took mere minutes. don't forget the strdup() call, the return value from defread() "points to static data, whose contents are overwritten by each call." - john.
allbery@ncoast.UUCP (Brandon S. Allbery) (06/16/88)
As quoted from <1259@percival.UUCP> by nerd@percival.UUCP (Michael Galassi): +--------------- | I just finished trying to compile the newgetty program recently | posted. I got _rdchk, _defread and _defopen as undefined by ld. I +--------------- rdchk() works on a Unix fd, not a stdio (FILE *). The "newgetty" posting was specific to Tandy Xenix 3.2, and will need some work to be ported elsewhere. Be warned that it may not function correctly on your system, depending on what BSD expects of a getty vs. what Tandy Xenix expects. defopen() and defread() comprise a simple global environment. defopen() opens the named file (Xenix convention is that defopen() files live in the /etc/default directory) and saves the file descriptor for defread(). Any open defopen() file is closed before the new file is opened. defread() looks for lines beginning with the string passed to it and returns a pointer to the rest of the line. An example (mirroring an actual use, although this better not be the actual code!) follows: /etc/default/mail: SPOOLONLY=yes mail.c: ... defopen("/etc/default/mail"); if ((cp = defread("SPOOLONLY=")) == (char *) 0 || strcmp(cp, "yes")) execl("/usr/lib/uucp/uucico", "UUCICO", "-r1", (char *) 0); ++Brandon -- Brandon S. Allbery | "Given its constituency, the only uunet!marque,sun!mandrill}!ncoast!allbery | thing I expect to be "open" about Delphi: ALLBERY MCI Mail: BALLBERY | [the Open Software Foundation] is comp.sources.misc: ncoast!sources-misc | its mouth." --John Gilmore