plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 1 | /* |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 2 | * Copyright (c) International Business Machines Corp., 2001 |
| 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; if not, write to the Free Software |
Wanlong Gao | 4548c6c | 2012-10-19 18:03:36 +0800 | [diff] [blame] | 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 17 | * |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 18 | * NAME |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 19 | * fork09.c |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 20 | * |
| 21 | * DESCRIPTION |
| 22 | * Check that child has access to a full set of files. |
| 23 | * |
| 24 | * ALGORITHM |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 25 | * Parent opens a maximum number of files |
| 26 | * Child closes one and attempts to open another, it should be |
| 27 | * available |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 28 | * |
| 29 | * USAGE |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 30 | * fork09 |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 31 | * |
| 32 | * HISTORY |
| 33 | * 07/2001 Ported by Wayne Boyer |
| 34 | * |
subrata_modak | ec04714 | 2008-10-22 12:12:45 +0000 | [diff] [blame] | 35 | * 10/2008 Suzuki K P <suzuki@in.ibm.com> |
| 36 | * Fix maximum number of files open logic. |
| 37 | * |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 38 | * RESTRICTIONS |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 39 | * None |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 40 | */ |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 41 | |
plars | 74948ad | 2002-11-14 16:16:14 +0000 | [diff] [blame] | 42 | #include <sys/types.h> |
| 43 | #include <sys/wait.h> |
| 44 | #include <sys/stat.h> |
| 45 | #include <fcntl.h> |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 46 | #include <stdio.h> |
| 47 | #include <errno.h> |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 48 | #include <unistd.h> /* for _SC_OPEN_MAX */ |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 49 | #include "test.h" |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 50 | |
robbiew | 0422f20 | 2002-02-27 17:48:21 +0000 | [diff] [blame] | 51 | char *TCID = "fork09"; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 52 | int TST_TOTAL = 1; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 53 | |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 54 | static void setup(void); |
| 55 | static void cleanup(void); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 56 | |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 57 | static char filname[40], childfile[40]; |
| 58 | static int first; |
| 59 | static FILE **fildeses; /* file streams */ |
| 60 | static int mypid, nfiles; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 61 | |
subrata_modak | 28e8149 | 2007-10-04 16:46:49 +0000 | [diff] [blame] | 62 | #define OPEN_MAX (sysconf(_SC_OPEN_MAX)) |
| 63 | |
plars | 74948ad | 2002-11-14 16:16:14 +0000 | [diff] [blame] | 64 | int main(int ac, char **av) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 65 | { |
plars | 74948ad | 2002-11-14 16:16:14 +0000 | [diff] [blame] | 66 | int pid, status, nf; |
subrata_modak | bdbaec5 | 2009-02-26 12:14:51 +0000 | [diff] [blame] | 67 | |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 68 | int lc; |
Cyril Hrubis | 0b9589f | 2014-05-27 17:40:33 +0200 | [diff] [blame] | 69 | const char *msg; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 70 | |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 71 | msg = parse_opts(ac, av, NULL, NULL); |
| 72 | if (msg != NULL) |
Garrett Cooper | 60fa801 | 2010-11-22 13:50:58 -0800 | [diff] [blame] | 73 | tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 74 | |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 75 | setup(); |
| 76 | |
Cyril Hrubis | d218f34 | 2014-09-23 13:14:56 +0200 | [diff] [blame] | 77 | fildeses = malloc((OPEN_MAX + 10) * sizeof(FILE *)); |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 78 | if (fildeses == NULL) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 79 | tst_brkm(TBROK, cleanup, "malloc failed"); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 80 | |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 81 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
Caspar Zhang | d59a659 | 2013-03-07 14:59:12 +0800 | [diff] [blame] | 82 | tst_count = 0; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 83 | mypid = getpid(); |
| 84 | |
subrata_modak | 923b23f | 2009-11-02 13:57:16 +0000 | [diff] [blame] | 85 | tst_resm(TINFO, "OPEN_MAX is %ld", OPEN_MAX); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 86 | |
| 87 | /* establish first free file */ |
robbiew | 0422f20 | 2002-02-27 17:48:21 +0000 | [diff] [blame] | 88 | sprintf(filname, "fork09.%d", mypid); |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 89 | first = creat(filname, 0660); |
| 90 | if (first == -1) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 91 | tst_brkm(TBROK, cleanup, "Cannot open first file %s, " |
| 92 | "errno = %d", filname, errno); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 93 | close(first); |
| 94 | |
| 95 | tst_resm(TINFO, "first file descriptor is %d ", first); |
| 96 | |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 97 | if (unlink(filname) == -1) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 98 | tst_brkm(TBROK, cleanup, "Cannot unlink file %s, " |
| 99 | "errno = %d", filname, errno); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 100 | |
| 101 | /* |
| 102 | * now open all the files for the test |
| 103 | */ |
| 104 | for (nfiles = first; nfiles < OPEN_MAX; nfiles++) { |
| 105 | sprintf(filname, "file%d.%d", nfiles, mypid); |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 106 | fildeses[nfiles] = fopen(filname, "a"); |
| 107 | if (fildeses[nfiles] == NULL) { |
subrata_modak | ec04714 | 2008-10-22 12:12:45 +0000 | [diff] [blame] | 108 | /* Did we already reach OPEN_MAX ? */ |
| 109 | if (errno == EMFILE) |
| 110 | break; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 111 | tst_brkm(TBROK, cleanup, "Parent: cannot open " |
| 112 | "file %d %s errno = %d", nfiles, |
| 113 | filname, errno); |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 114 | } |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 115 | #ifdef DEBUG |
| 116 | tst_resm(TINFO, "filname: %s", filname); |
| 117 | #endif |
| 118 | } |
| 119 | |
| 120 | tst_resm(TINFO, "Parent reporting %d files open", nfiles - 1); |
| 121 | |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 122 | pid = fork(); |
| 123 | if (pid == -1) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 124 | tst_brkm(TBROK, cleanup, "Fork failed"); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 125 | |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 126 | if (pid == 0) { /* child */ |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 127 | nfiles--; |
| 128 | if (fclose(fildeses[nfiles]) == -1) { |
| 129 | tst_resm(TINFO, "Child could not close file " |
| 130 | "#%d, errno = %d", nfiles, errno); |
| 131 | exit(1); |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 132 | } else { |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 133 | sprintf(childfile, "cfile.%d", getpid()); |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 134 | fildeses[nfiles] = fopen(childfile, "a"); |
| 135 | if (fildeses[nfiles] == NULL) { |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 136 | tst_resm(TINFO, "Child could not open " |
| 137 | "file %s, errno = %d", |
| 138 | childfile, errno); |
| 139 | exit(1); |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 140 | } else { |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 141 | tst_resm(TINFO, "Child opened new " |
subrata_modak | 4bb656a | 2009-02-26 12:02:09 +0000 | [diff] [blame] | 142 | "file #%d", nfiles); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 143 | unlink(childfile); |
| 144 | exit(0); |
| 145 | } |
| 146 | } |
subrata_modak | 56207ce | 2009-03-23 13:35:39 +0000 | [diff] [blame] | 147 | } else { /* parent */ |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 148 | wait(&status); |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 149 | if (status >> 8 != 0) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 150 | tst_resm(TFAIL, "test 1 FAILED"); |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 151 | else |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 152 | tst_resm(TPASS, "test 1 PASSED"); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | /* clean up things in case we are looping */ |
| 156 | for (nf = first; nf < nfiles; nf++) { |
| 157 | fclose(fildeses[nf]); |
| 158 | sprintf(filname, "file%d.%d", nf, mypid); |
| 159 | unlink(filname); |
| 160 | } |
| 161 | } |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 162 | |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 163 | cleanup(); |
Garrett Cooper | 7d0a4a5 | 2010-12-16 10:05:08 -0800 | [diff] [blame] | 164 | tst_exit(); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 165 | } |
subrata_modak | bdbaec5 | 2009-02-26 12:14:51 +0000 | [diff] [blame] | 166 | |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 167 | static void setup(void) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 168 | { |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 169 | tst_sig(FORK, DEF_HANDLER, cleanup); |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 170 | umask(0); |
| 171 | |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 172 | TEST_PAUSE; |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 173 | tst_tmpdir(); |
| 174 | } |
| 175 | |
Mike Frysinger | c57fba5 | 2014-04-09 18:56:30 -0400 | [diff] [blame] | 176 | static void cleanup(void) |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 177 | { |
plars | 865695b | 2001-08-27 22:15:12 +0000 | [diff] [blame] | 178 | tst_rmdir(); |
Wanlong Gao | a91a4de | 2012-09-18 17:14:01 +0800 | [diff] [blame] | 179 | } |