1 /* 2 * Copyright (c) International Business Machines Corp., 2002 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 12 * the GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. 16 */ 17 18 /* 19 * Make sure that writing to the read end of a pipe and reading from 20 * the write end of a pipe both fail. 21 */ 22 23 #include <unistd.h> 24 #include <errno.h> 25 #include "tst_test.h" 26 27 static int fd[2]; 28 29 static void verify_pipe(void) 30 { 31 char buf[2]; 32 33 TEST(pipe(fd)); 34 if (TST_RET == -1) { 35 tst_res(TFAIL | TTERRNO, "pipe() failed unexpectedly"); 36 return; 37 } 38 39 TEST(write(fd[0], "A", 1)); 40 if (TST_RET == -1 && errno == EBADF) { 41 tst_res(TPASS | TTERRNO, "expected failure writing " 42 "to read end of pipe"); 43 } else { 44 tst_res(TFAIL | TTERRNO, "unexpected failure writing " 45 "to read end of pipe"); 46 } 47 48 TEST(read(fd[1], buf, 1)); 49 if (TST_RET == -1 && errno == EBADF) { 50 tst_res(TPASS | TTERRNO, "expected failure reading " 51 "from write end of pipe"); 52 } else { 53 tst_res(TFAIL | TTERRNO, "unexpected failure reading " 54 "from write end of pipe"); 55 } 56 57 SAFE_CLOSE(fd[0]); 58 SAFE_CLOSE(fd[1]); 59 } 60 61 static struct tst_test test = { 62 .test_all = verify_pipe, 63 }; 64
