fnf@fishpond.UUCP (Fred Fish) (08/20/88)
The following demonstrates what looks like a problem with the
"A/UX Initial Console Emulator". Can anyone suggest any workarounds?
Thanks.
-Fred
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Script started on Fri Aug 19 12:50:04 1988
fishpond:222> cat bug.c
#include <stdio.h>
main ()
{
extern char *ttyname ();
extern int isatty ();
printf ("isatty (stdin) = %d\n", isatty (stdin));
printf ("isatty (stdout) = %d\n", isatty (stdout));
printf ("isatty (stderr) = %d\n", isatty (stderr));
printf ("ttyname (stdin) = %s\n", ttyname (stdin));
printf ("ttyname (stdout) = %s\n", ttyname (stdout));
printf ("ttyname (stderr) = %s\n", ttyname (stderr));
}
fishpond:223> cc bug.c
fishpond:224> a.out
isatty (stdin) = 0
isatty (stdout) = 0
isatty (stderr) = 0
ttyname (stdin) = P
ttyname (stdout) = P
ttyname (stderr) = P
fishpond:225> exit
script done on Fri Aug 19 12:50:27 1988
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--
# Fred Fish, 1346 West 10th Place, Tempe, AZ 85281, USA
# noao!nud!fishpond!fnf (602) 921-1113dwb@Apple.COM (David W. Berry) (08/23/88)
In article <121@fishpond.UUCP> fnf@fishpond.UUCP (Fred Fish) writes: >The following demonstrates what looks like a problem with the >"A/UX Initial Console Emulator". Can anyone suggest any workarounds? >Thanks. >-Fred Nope, I'd say it looks like a problem with your test program. isatty and ttyname both work on a file descriptor and your passing it a FILE structure. Try replacing stdin with fileno(stdin) and similar for stdout and stderr and you'll get what you expect. > >---------------------------------------------------------------------- >Script started on Fri Aug 19 12:50:04 1988 >fishpond:222> cat bug.c >#include <stdio.h> > >main () >{ > extern char *ttyname (); > extern int isatty (); > > printf ("isatty (stdin) = %d\n", isatty (stdin)); > printf ("isatty (stdout) = %d\n", isatty (stdout)); > printf ("isatty (stderr) = %d\n", isatty (stderr)); > printf ("ttyname (stdin) = %s\n", ttyname (stdin)); > printf ("ttyname (stdout) = %s\n", ttyname (stdout)); > printf ("ttyname (stderr) = %s\n", ttyname (stderr)); >} Opinions: MINE, ALL MINE! (greedy evil chuckle) David W. Berry apple!dwb@sun.com dwb@apple.com 973-5168@408.MaBell
fnf@fishpond.UUCP (Fred Fish) (08/23/88)
In article <15956@apple.Apple.COM> dwb@apple.com.UUCP (David W. Berry) writes: +In article <121@fishpond.UUCP> fnf@fishpond.UUCP (Fred Fish) writes: ++The following demonstrates what looks like a problem with the ++"A/UX Initial Console Emulator". Can anyone suggest any workarounds? + Nope, I'd say it looks like a problem with your test +program. isatty and ttyname both work on a file descriptor +and your passing it a FILE structure. Try replacing stdin with +fileno(stdin) and similar for stdout and stderr and you'll get +what you expect. Yes, I received mail from several people pointing out my boo-boo (thanks everyone!). Guess that will teach me to look in the manual after I haven't used a function for a while. -Fred -- # Fred Fish, 1346 West 10th Place, Tempe, AZ 85281, USA # noao!nud!fishpond!fnf (602) 921-1113