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Include header files to bring appropriate header files into scope.

This commit is contained in:
jtc 1993-09-20 23:53:24 +00:00
parent 26afbefdad
commit d3027df0ae
1 changed files with 20 additions and 6 deletions
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26
usr.bin/tty/tty.c
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@ -39,32 +39,46 @@ char copyright[] =
#ifndef lint
/*static char sccsid[] = "from: @(#)tty.c 4.4 (Berkeley) 6/1/90";*/
static char rcsid[] = "$Id: tty.c,v 1.2 1993/08/01 18:04:12 mycroft Exp $";
static char rcsid[] = "$Id: tty.c,v 1.3 1993/09/20 23:53:24 jtc Exp $";
#endif /* not lint */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static void usage __P((void));
int
main(argc, argv)
int argc;
char **argv;
{
int ch, sflag;
char *t, *ttyname();
char *t;
sflag = 0;
while ((ch = getopt(argc, argv, "s")) != EOF)
while ((ch = getopt(argc, argv, "s")) != -1) {
switch((char)ch) {
case 's':
sflag = 1;
break;
case '?':
default:
fputs("usage: tty [-s]\n", stderr);
exit(2);
usage();
/* NOTREACHED */
}
}
t = ttyname(0);
t = ttyname(STDIN_FILENO);
if (!sflag)
puts(t ? t : "not a tty");
exit(t ? 0 : 1);
}
static void
usage ()
{
fprintf(stderr, "usage: tty [-s]\n");
exit(2);
}