TIOCGPGRP copies an int out of the kernel

[unix-history] / usr / src / lib / libc / stdio / gets.c

/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek.
*
* %sccs.include.redist.c%
*/

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)gets.c      5.3 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <unistd.h>
#include <stdio.h>

char *
gets(buf)
       char *buf;
{
       register int c;
       register char *s;
       static int warned;
       static char w[] =
           "warning: this program uses gets(), which is unsafe.\r\n";

       if (!warned) {
               (void) write(STDERR_FILENO, w, sizeof(w) - 1);
               warned = 1;
       }
       for (s = buf; (c = getchar()) != '\n';)
               if (c == EOF)
                       if (s == buf)
                               return (NULL);
                       else
                               break;
               else
                       *s++ = c;
       *s = 0;
       return (buf);
}