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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:17:27 +0000 |
commit | f215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch) | |
tree | 6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/test/tst/common/io/tst.fds.c | |
parent | Initial commit. (diff) | |
download | virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip |
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/test/tst/common/io/tst.fds.c')
-rw-r--r-- | src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/test/tst/common/io/tst.fds.c | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/test/tst/common/io/tst.fds.c b/src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/test/tst/common/io/tst.fds.c new file mode 100644 index 00000000..2785b51f --- /dev/null +++ b/src/VBox/ExtPacks/VBoxDTrace/onnv/cmd/dtrace/test/tst/common/io/tst.fds.c @@ -0,0 +1,100 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ + +/* + * Copyright 2006 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +#include <assert.h> +#include <setjmp.h> +#include <signal.h> +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <fcntl.h> + +static sigjmp_buf env; + +static void +interrupt(int sig) +{ + siglongjmp(env, sig); +} + +int +main(int argc, char *argv[]) +{ + const char *file = "/dev/null"; + int i, n, fds[10]; + struct sigaction act; + + if (argc > 1) { + (void) fprintf(stderr, "Usage: %s\n", argv[0]); + return (EXIT_FAILURE); + } + + act.sa_handler = interrupt; + act.sa_flags = 0; + + (void) sigemptyset(&act.sa_mask); + (void) sigaction(SIGUSR1, &act, NULL); + + closefrom(0); + n = 0; + + /* + * With all of our file descriptors closed, wait here spinning in bogus + * ioctl() calls until DTrace hits us with a SIGUSR1 to start the test. + */ + if (sigsetjmp(env, 1) == 0) { + for (;;) + (void) ioctl(-1, -1, NULL); + } + + /* + * To test the fds[] array, we open /dev/null (a file with reliable + * pathname and properties) using various flags and seek offsets. + */ + fds[n++] = open(file, O_RDONLY); + fds[n++] = open(file, O_WRONLY); + fds[n++] = open(file, O_RDWR); + + fds[n++] = open(file, O_RDWR | O_APPEND | O_CREAT | O_DSYNC | + O_LARGEFILE | O_NOCTTY | O_NONBLOCK | O_NDELAY | O_RSYNC | + O_SYNC | O_TRUNC | O_XATTR); + + fds[n++] = open(file, O_RDWR); + (void) lseek(fds[n - 1], 123, SEEK_SET); + + /* + * Once we have all the file descriptors in the state we want to test, + * issue a bogus ioctl() on each fd with cmd -1 and arg NULL to whack + * our DTrace script into recording the content of the fds[] array. + */ + for (i = 0; i < n; i++) + (void) ioctl(fds[i], -1, NULL); + + assert(n <= sizeof (fds) / sizeof (fds[0])); + exit(0); +} |