| /* |
| * Copyright (c) 2012 Linux Test Project. All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * Further, this software is distributed without any warranty that it is |
| * free of the rightful claim of any third person regarding infringement |
| * or the like. Any license provided herein, whether implied or |
| * otherwise, applies only to this software file. Patent licenses, if |
| * any, provided herein do not apply to combinations of this program with |
| * other software, or any other product whatsoever. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write the Free Software Foundation, Inc., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Ngie Cooper, April 2012 |
| */ |
| |
| /**************************************************************************** |
| * DESCRIPTION |
| * verify that IN_DELETE_SELF functions as expected |
| * |
| * ALGORITHM |
| * This testcase creates a temporary directory, then add watches to a |
| * predefined file and subdirectory, and delete the file and directory to |
| * ensure that the IN_DELETE_SELF event is captured properly. |
| * |
| * Because of how the inotify(7) API is designed, we also need to catch the |
| * IN_ATTRIB and IN_IGNORED events. |
| * |
| ****************************************************************************/ |
| |
| #include "config.h" |
| |
| #if defined(HAVE_SYS_INOTIFY_H) |
| #include <sys/inotify.h> |
| #endif |
| #include <errno.h> |
| #include <string.h> |
| #include "test.h" |
| #include "lapi/syscalls.h" |
| #include "inotify.h" |
| #include "safe_macros.h" |
| |
| char *TCID = "inotify04"; |
| int TST_TOTAL = 4; |
| |
| #if defined(HAVE_SYS_INOTIFY_H) |
| |
| #define EVENT_MAX 1024 |
| /* size of the event structure, not counting name */ |
| #define EVENT_SIZE (sizeof(struct inotify_event)) |
| /* reasonable guess as to size of 1024 events */ |
| #define EVENT_BUF_LEN (EVENT_MAX * (EVENT_SIZE + 16)) |
| |
| |
| #define BUF_SIZE 256 |
| |
| struct event_t { |
| char name[BUF_SIZE]; |
| unsigned int mask; |
| }; |
| |
| #define TEST_DIR "test_dir" |
| #define TEST_FILE "test_file" |
| |
| struct event_t event_set[EVENT_MAX]; |
| |
| char event_buf[EVENT_BUF_LEN]; |
| |
| int fd_notify, reap_wd_file, reap_wd_dir, wd_dir, wd_file; |
| |
| static struct tst_kern_exv kvers[] = { |
| { "RHEL5", "2.6.18-132" }, |
| { NULL, NULL }, |
| }; |
| |
| static void cleanup(void) |
| { |
| |
| if (reap_wd_dir && myinotify_rm_watch(fd_notify, wd_dir) == -1) |
| tst_resm(TWARN, |
| "inotify_rm_watch(%d, %d) [1] failed", fd_notify, |
| wd_dir); |
| |
| if (reap_wd_file && myinotify_rm_watch(fd_notify, wd_file) == -1) |
| tst_resm(TWARN, |
| "inotify_rm_watch(%d, %d) [2] failed", fd_notify, |
| wd_file); |
| |
| if (fd_notify > 0 && close(fd_notify)) |
| tst_resm(TWARN, "close(%d) [1] failed", fd_notify); |
| |
| if (wd_dir > 0 && close(wd_dir)) |
| tst_resm(TWARN, "close(%d) [2] failed", wd_dir); |
| |
| if (wd_file > 0 && close(wd_file)) |
| tst_resm(TWARN, "close(%d) [3] failed", wd_file); |
| |
| tst_rmdir(); |
| } |
| |
| static void setup(void) |
| { |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| tst_tmpdir(); |
| |
| fd_notify = myinotify_init(); |
| if (fd_notify == -1) { |
| if (errno == ENOSYS) { |
| tst_brkm(TCONF, cleanup, |
| "inotify is not configured in this kernel."); |
| } else { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "inotify_init failed"); |
| } |
| } |
| |
| SAFE_MKDIR(cleanup, TEST_DIR, 00700); |
| |
| close(SAFE_CREAT(cleanup, TEST_FILE, 00600)); |
| |
| wd_dir = myinotify_add_watch(fd_notify, TEST_DIR, IN_ALL_EVENTS); |
| if (wd_dir == -1) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "inotify_add_watch(%d, \"%s\", IN_ALL_EVENTS) [1] failed", |
| fd_notify, TEST_DIR); |
| } |
| reap_wd_dir = 1; |
| |
| wd_file = myinotify_add_watch(fd_notify, TEST_FILE, IN_ALL_EVENTS); |
| if (wd_file == -1) |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "inotify_add_watch(%d, \"%s\", IN_ALL_EVENTS) [2] failed", |
| fd_notify, TEST_FILE); |
| reap_wd_file = 1; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int i, test_num, len; |
| |
| i = 0; |
| test_num = 0; |
| |
| tst_parse_opts(argc, argv, NULL, NULL); |
| |
| setup(); |
| |
| tst_count = 0; |
| |
| rmdir(TEST_DIR); |
| event_set[tst_count].mask = IN_DELETE_SELF; |
| strcpy(event_set[tst_count].name, ""); |
| tst_count++; |
| event_set[tst_count].mask = IN_IGNORED; |
| strcpy(event_set[tst_count].name, ""); |
| tst_count++; |
| |
| unlink(TEST_FILE); |
| /* |
| * When a file is unlinked, the link count is reduced by 1, and when it |
| * hits 0 the file is removed. |
| * |
| * This isn't well documented in inotify(7), but it's intuitive if you |
| * understand how Unix works. |
| */ |
| if (tst_kvercmp2(2, 6, 25, kvers) >= 0) { |
| event_set[tst_count].mask = IN_ATTRIB; |
| strcpy(event_set[tst_count].name, ""); |
| tst_count++; |
| TST_TOTAL++; |
| } |
| event_set[tst_count].mask = IN_DELETE_SELF; |
| strcpy(event_set[tst_count].name, TEST_FILE); |
| tst_count++; |
| event_set[tst_count].mask = IN_IGNORED; |
| strcpy(event_set[tst_count].name, ""); |
| tst_count++; |
| |
| if (tst_count != TST_TOTAL) |
| tst_brkm(TBROK, cleanup, |
| "tst_count and TST_TOTAL are not equal"); |
| |
| tst_count = 0; |
| |
| len = read(fd_notify, event_buf, EVENT_BUF_LEN); |
| if (len == -1) |
| tst_brkm(TBROK | TERRNO, cleanup, "read failed"); |
| |
| reap_wd_dir = 0; |
| reap_wd_file = 0; |
| |
| while (i < len) { |
| struct inotify_event *event; |
| event = (struct inotify_event *)&event_buf[i]; |
| if (test_num >= TST_TOTAL) { |
| if (tst_kvercmp(2, 6, 25) < 0 |
| && event_set[TST_TOTAL - 1].mask == event->mask) |
| tst_resm(TWARN, |
| "This may be kernel bug. " |
| "Before kernel 2.6.25, a kernel bug " |
| "meant that the kernel code that was " |
| "intended to coalesce successive identical " |
| "events (i.e., the two most recent " |
| "events could potentially be coalesced " |
| "if the older had not yet been read) " |
| "instead checked if the most recent event " |
| "could be coalesced with the oldest " |
| "unread event. This has been fixed by commit" |
| "1c17d18e3775485bf1e0ce79575eb637a94494a2."); |
| tst_resm(TFAIL, |
| "got unnecessary event: " |
| "wd=%d mask=%x cookie=%u len=%u " |
| "name=\"%.*s\"", event->wd, event->mask, |
| event->cookie, event->len, event->len, event->name); |
| |
| } else if ((event_set[test_num].mask == event->mask) |
| && |
| (!strncmp |
| (event_set[test_num].name, event->name, |
| event->len))) { |
| tst_resm(TPASS, |
| "got event: wd=%d mask=%x " |
| "cookie=%u len=%u name=\"%.*s\"", |
| event->wd, event->mask, event->cookie, |
| event->len, event->len, event->name); |
| |
| } else { |
| tst_resm(TFAIL, "got event: wd=%d mask=%x " |
| "(expected %x) cookie=%u len=%u " |
| "name=\"%.*s\" (expected \"%s\") %d", |
| event->wd, event->mask, |
| event_set[test_num].mask, |
| event->cookie, event->len, |
| event->len, event->name, |
| event_set[test_num].name, |
| strncmp(event_set[test_num].name, event->name, event->len)); |
| } |
| test_num++; |
| i += EVENT_SIZE + event->len; |
| } |
| |
| for (; test_num < TST_TOTAL; test_num++) { |
| tst_resm(TFAIL, "didn't get event: mask=%x ", |
| event_set[test_num].mask); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| #else |
| int main(void) |
| { |
| tst_brkm(TCONF, NULL, "system doesn't have required inotify support"); |
| } |
| #endif /* defined(HAVE_SYS_INOTIFY_H) */ |