tests/lib/libc/ttyio/t_ttyio.c

   1 /*      $NetBSD: t_ttyio.c,v 1.2 2011/04/19 20:07:53 martin Exp $ */
   2
   3 /*
   4  * Copyright (c) 2001, 2008 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Andrew Brown.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __COPYRIGHT("@(#) Copyright (c) 2008\
  34  The NetBSD Foundation, inc. All rights reserved.");
  35 __RCSID("$NetBSD: t_ttyio.c,v 1.2 2011/04/19 20:07:53 martin Exp $");
  36
  37 #include <sys/types.h>
  38 #include <sys/wait.h>
  39
  40 #include <err.h>
  41 #include <errno.h>
  42 #include <signal.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <string.h>
  46 #include <termios.h>
  47 #include <unistd.h>
  48
  49 #if defined(__NetBSD__)
  50 #include <util.h>
  51 #elif defined(__bsdi__)
  52 int openpty(int *, int *, char *, struct termios *, struct winsize *);
  53 #elif defined(__FreeBSD__)
  54 #include <libutil.h>
  55 #else
  56 #error where openpty?
  57 #endif
  58
  59 #include <atf-c.h>
  60
  61 #define REQUIRE_ERRNO(x, v) ATF_REQUIRE_MSG(x != v, "%s: %s", #x, strerror(errno))
  62
  63 ATF_TC(ioctl);
  64 ATF_TC_HEAD(ioctl, tc)
  65 {
  66         atf_tc_set_md_var(tc, "descr",
  67                 "Checks that ioctl calls are restarted "
  68                 "properly after being interrupted");
  69 }
  70
  71 /* ARGSUSED */
  72 static void
  73 sigchld(int nsig)
  74 {
  75         REQUIRE_ERRNO(wait(NULL), -1);
  76 }
  77
  78 ATF_TC_BODY(ioctl, tc)
  79 {
  80         int m, s, rc;
  81         char name[128], buf[128];
  82         struct termios term;
  83         struct sigaction sa;
  84
  85         /* unbuffer stdout */
  86         setbuf(stdout, NULL);
  87
  88         /*
  89          * Create default termios settings for later use
  90          */
  91         memset(&term, 0, sizeof(term));
  92         term.c_iflag = TTYDEF_IFLAG;
  93         term.c_oflag = TTYDEF_OFLAG;
  94         term.c_cflag = TTYDEF_CFLAG;
  95         term.c_lflag = TTYDEF_LFLAG;
  96         cfsetspeed(&term, TTYDEF_SPEED);
  97
  98         /* get a tty */
  99         REQUIRE_ERRNO(openpty(&m, &s, name, &term, NULL), -1);
 100
 101         switch (fork()) {
 102         case -1:
 103                 atf_tc_fail("fork(): %s", strerror(errno));
 104                 /* NOTREACHED */
 105         case 0:
 106                 /* wait for parent to get set up */
 107                 (void)sleep(1);
 108                 (void)printf("child1: exiting\n");
 109                 exit(0);
 110                 /* NOTREACHED */
 111         default:
 112                 (void)printf("parent: spawned child1\n");
 113                 break;
 114         }
 115
 116         switch (fork()) {
 117         case -1:
 118                 atf_tc_fail("fork(): %s", strerror(errno));
 119                 /* NOTREACHED */
 120         case 0:
 121                 /* wait for parent to get upset */
 122                 (void)sleep(2);
 123                 /* drain the tty q */
 124                 if (read(m, buf, sizeof(buf)) == -1)
 125                         err(1, "read");
 126                 (void)printf("child2: exiting\n");
 127                 exit(0);
 128                 /* NOTREACHED */
 129         default:
 130                 (void)printf("parent: spawned child2\n");
 131                 break;
 132         }
 133
 134         /* set up a restarting signal handler */
 135         (void)sigemptyset(&sa.sa_mask);
 136         sa.sa_handler = sigchld;
 137         sa.sa_flags = SA_RESTART;
 138         REQUIRE_ERRNO(sigaction(SIGCHLD, &sa, NULL), -1);
 139
 140         /* put something in the output q */
 141         REQUIRE_ERRNO(write(s, "Hello world\n", 12), -1);
 142
 143         /* ask for output to drain but don't drain it */
 144         rc = 0;
 145         if (tcsetattr(s, TCSADRAIN, &term) == -1) {
 146                 (void)printf("parent: tcsetattr: %s\n", strerror(errno));
 147                 rc = 1;
 148         }
 149
 150         /* wait for last child */
 151         sa.sa_handler = SIG_DFL;
 152         REQUIRE_ERRNO(sigaction(SIGCHLD, &sa, NULL), -1);
 153         (void) wait(NULL);
 154
 155         ATF_REQUIRE_EQ(rc, 0);
 156 }
 157
 158 ATF_TP_ADD_TCS(tp)
 159 {
 160         ATF_TP_ADD_TC(tp, ioctl);
 161
 162         return atf_no_error();
 163 }