1 /* 2 * Copyright (c) International Business Machines Corp., 2001 3 * 07/2001 Ported by Wayne Boyer 4 * 5 * Copyright (c) 2013 Cyril Hrubis <chrubis (at) suse.cz> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 15 * the GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 /* 23 * DESCRIPTION 24 * Testcase to check the basic functionality of the readv(2) system call. 25 * 26 * ALGORITHM 27 * Create a IO vector, and attempt to readv() various components of it. 28 */ 29 #include <stdlib.h> 30 #include <sys/types.h> 31 #include <sys/uio.h> 32 #include <fcntl.h> 33 #include <memory.h> 34 #include <errno.h> 35 36 #include "test.h" 37 #include "safe_macros.h" 38 39 #define CHUNK 64 40 41 char *TCID = "readv01"; 42 int TST_TOTAL = 1; 43 44 static char buf[CHUNK]; 45 46 static struct iovec rd_iovec[] = { 47 {buf, CHUNK}, 48 {NULL, 0}, 49 {NULL, 0}, 50 }; 51 52 static int fd; 53 54 static void setup(void); 55 static void cleanup(void); 56 57 int main(int ac, char **av) 58 { 59 int lc, i, fail; 60 char *vec; 61 62 tst_parse_opts(ac, av, NULL, NULL); 63 64 setup(); 65 66 for (lc = 0; TEST_LOOPING(lc); lc++) { 67 tst_count = 0; 68 69 SAFE_LSEEK(cleanup, fd, 0, SEEK_SET); 70 71 if (readv(fd, rd_iovec, 0) == -1) 72 tst_resm(TFAIL | TERRNO, "readv failed unexpectedly"); 73 else 74 tst_resm(TPASS, "readv read 0 io vectors"); 75 76 memset(rd_iovec[0].iov_base, 0x00, CHUNK); 77 78 if (readv(fd, rd_iovec, 3) != CHUNK) { 79 tst_resm(TFAIL, "readv failed reading %d bytes, " 80 "followed by two NULL vectors", CHUNK); 81 } else { 82 fail = 0; 83 vec = rd_iovec[0].iov_base; 84 85 for (i = 0; i < CHUNK; i++) { 86 if (vec[i] != 0x42) 87 fail++; 88 } 89 90 if (fail) 91 tst_resm(TFAIL, "Wrong buffer content"); 92 else 93 tst_resm(TPASS, "readv passed reading %d bytes " 94 "followed by two NULL vectors", CHUNK); 95 } 96 } 97 98 cleanup(); 99 tst_exit(); 100 } 101 102 static void setup(void) 103 { 104 tst_sig(NOFORK, DEF_HANDLER, cleanup); 105 106 TEST_PAUSE; 107 108 tst_tmpdir(); 109 110 memset(buf, 0x42, sizeof(buf)); 111 112 fd = SAFE_OPEN(cleanup, "data_file", O_WRONLY | O_CREAT, 0666); 113 SAFE_WRITE(cleanup, 1, fd, buf, sizeof(buf)); 114 SAFE_CLOSE(cleanup, fd); 115 fd = SAFE_OPEN(cleanup, "data_file", O_RDONLY); 116 } 117 118 static void cleanup(void) 119 { 120 if (fd > 0) 121 close(fd); 122 123 tst_rmdir(); 124 } 125
