mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2025-08-16 08:08:49 +00:00
3193e8942f
samples/fanotify/fs-monitor.c:22:9: error: unknown type name '__s32'
22 | __s32 error;
| ^~~~~
samples/fanotify/fs-monitor.c:23:9: error: unknown type name '__u32'
23 | __u32 error_count;
| ^~~~~
samples/fanotify/fs-monitor.c: In function 'handle_notifications':
samples/fanotify/fs-monitor.c:98:50: error: 'fsid_t' has no member named 'val';
did you mean '__val'?
98 | fid->fsid.val[0],
fid->fsid.val[1]);
| ^~~
| __val
samples/fanotify/fs-monitor.c:98:68: error: 'fsid_t' has no member named 'val';
did you mean '__val'?
98 | fid->fsid.val[0],
fid->fsid.val[1]);
| ^~~
| __val
This is due to sys/fanotify.h on musl does not include
linux/fanotify.h[0] unlike glibc which includes it. This also results in
fsid not being of type __kernel_fsid_t, rather the libc's definition of
it which does not have val, but instead __val.
[0]: https://git.musl-libc.org/cgit/musl/tree/include/sys/fanotify.h
Signed-off-by: Brahmajit Das <listout@listout.xyz>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://patch.msgid.link/20250630103011.27484-1-listout@listout.xyz
150 lines
3.2 KiB
C
150 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2021, Collabora Ltd.
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*/
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#define _GNU_SOURCE
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#include <errno.h>
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#include <err.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <sys/fanotify.h>
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#include <sys/types.h>
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#include <unistd.h>
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#ifndef __GLIBC__
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#include <asm-generic/int-ll64.h>
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#endif
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#ifndef FAN_FS_ERROR
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#define FAN_FS_ERROR 0x00008000
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#define FAN_EVENT_INFO_TYPE_ERROR 5
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struct fanotify_event_info_error {
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struct fanotify_event_info_header hdr;
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__s32 error;
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__u32 error_count;
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};
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#endif
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#ifndef FILEID_INO32_GEN
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#define FILEID_INO32_GEN 1
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#endif
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#ifndef FILEID_INVALID
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#define FILEID_INVALID 0xff
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#endif
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static void print_fh(struct file_handle *fh)
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{
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int i;
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uint32_t *h = (uint32_t *) fh->f_handle;
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printf("\tfh: ");
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for (i = 0; i < fh->handle_bytes; i++)
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printf("%hhx", fh->f_handle[i]);
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printf("\n");
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printf("\tdecoded fh: ");
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if (fh->handle_type == FILEID_INO32_GEN)
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printf("inode=%u gen=%u\n", h[0], h[1]);
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else if (fh->handle_type == FILEID_INVALID && !fh->handle_bytes)
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printf("Type %d (Superblock error)\n", fh->handle_type);
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else
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printf("Type %d (Unknown)\n", fh->handle_type);
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}
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static void handle_notifications(char *buffer, int len)
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{
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struct fanotify_event_metadata *event =
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(struct fanotify_event_metadata *) buffer;
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struct fanotify_event_info_header *info;
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struct fanotify_event_info_error *err;
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struct fanotify_event_info_fid *fid;
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int off;
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for (; FAN_EVENT_OK(event, len); event = FAN_EVENT_NEXT(event, len)) {
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if (event->mask != FAN_FS_ERROR) {
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printf("unexpected FAN MARK: %llx\n",
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(unsigned long long)event->mask);
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goto next_event;
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}
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if (event->fd != FAN_NOFD) {
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printf("Unexpected fd (!= FAN_NOFD)\n");
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goto next_event;
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}
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printf("FAN_FS_ERROR (len=%d)\n", event->event_len);
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for (off = sizeof(*event) ; off < event->event_len;
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off += info->len) {
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info = (struct fanotify_event_info_header *)
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((char *) event + off);
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switch (info->info_type) {
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case FAN_EVENT_INFO_TYPE_ERROR:
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err = (struct fanotify_event_info_error *) info;
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printf("\tGeneric Error Record: len=%d\n",
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err->hdr.len);
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printf("\terror: %d\n", err->error);
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printf("\terror_count: %d\n", err->error_count);
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break;
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case FAN_EVENT_INFO_TYPE_FID:
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fid = (struct fanotify_event_info_fid *) info;
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printf("\tfsid: %x%x\n",
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#if defined(__GLIBC__)
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fid->fsid.val[0], fid->fsid.val[1]);
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#else
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fid->fsid.__val[0], fid->fsid.__val[1]);
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#endif
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print_fh((struct file_handle *) &fid->handle);
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break;
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default:
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printf("\tUnknown info type=%d len=%d:\n",
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info->info_type, info->len);
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}
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}
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next_event:
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printf("---\n\n");
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}
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}
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int main(int argc, char **argv)
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{
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int fd;
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char buffer[BUFSIZ];
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if (argc < 2) {
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printf("Missing path argument\n");
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return 1;
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}
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fd = fanotify_init(FAN_CLASS_NOTIF|FAN_REPORT_FID, O_RDONLY);
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if (fd < 0)
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errx(1, "fanotify_init");
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if (fanotify_mark(fd, FAN_MARK_ADD|FAN_MARK_FILESYSTEM,
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FAN_FS_ERROR, AT_FDCWD, argv[1])) {
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errx(1, "fanotify_mark");
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}
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while (1) {
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int n = read(fd, buffer, BUFSIZ);
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if (n < 0)
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errx(1, "read");
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handle_notifications(buffer, n);
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}
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return 0;
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}
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