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Code Packages

fanotify-watch: Not really part of Bees, but a useful tool nonetheless

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This commit is contained in:
Zygo Blaxell 2016-11-18 12:48:40 -05:00
parent 876b76d761
commit 11f69ff6c1
2 changed files with 92 additions and 0 deletions
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1
src/Makefile
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@ -1,5 +1,6 @@
PROGRAMS = \
../bin/bees \
../bin/fanotify-watch \
../bin/fiemap \
../bin/fiewalk \

91
src/fanotify-watch.cc Normal file
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@ -0,0 +1,91 @@
#include <crucible/error.h>
#include <crucible/fd.h>
#include <crucible/ntoa.h>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <string>
#include <unistd.h>
#include <sys/fanotify.h>
using namespace crucible;
using namespace std;
static
void
usage(const char *name)
{
cerr << "Usage: " << name << " directory" << endl;
cerr << "Reports fanotify events from directory" << endl;
}
struct fan_read_block {
struct fanotify_event_metadata fem;
// more here in the future. Maybe.
};
static inline
string
fan_flag_ntoa(uint64_t ui)
{
static const bits_ntoa_table flag_names[] = {
NTOA_TABLE_ENTRY_BITS(FAN_ACCESS),
NTOA_TABLE_ENTRY_BITS(FAN_OPEN),
NTOA_TABLE_ENTRY_BITS(FAN_MODIFY),
NTOA_TABLE_ENTRY_BITS(FAN_CLOSE),
NTOA_TABLE_ENTRY_BITS(FAN_CLOSE_WRITE),
NTOA_TABLE_ENTRY_BITS(FAN_CLOSE_NOWRITE),
NTOA_TABLE_ENTRY_BITS(FAN_Q_OVERFLOW),
NTOA_TABLE_ENTRY_BITS(FAN_ACCESS_PERM),
NTOA_TABLE_ENTRY_BITS(FAN_OPEN_PERM),
NTOA_TABLE_ENTRY_END()
};
return bits_ntoa(ui, flag_names);
}
int
main(int argc, char **argv)
{
if (argc < 1) {
usage(argv[0]);
exit(EXIT_FAILURE);
}
Fd fd;
DIE_IF_MINUS_ONE(fd = fanotify_init(FAN_CLASS_NOTIF, O_RDONLY | O_LARGEFILE | O_CLOEXEC | O_NOATIME));
for (char **argvp = argv + 1; *argvp; ++argvp) {
cerr << "fanotify_mark(" << *argvp << ")..." << flush;
DIE_IF_MINUS_ONE(fanotify_mark(fd, FAN_MARK_ADD | FAN_MARK_MOUNT, FAN_CLOSE_WRITE | FAN_CLOSE_NOWRITE | FAN_OPEN, FAN_NOFD, *argvp));
cerr << endl;
}
while (1) {
struct fan_read_block frb;
read_or_die(fd, frb);
#if 0
cout << "event_len\t= " << frb.fem.event_len << endl;
cout << "vers\t= " << static_cast<int>(frb.fem.vers) << endl;
cout << "reserved\t= " << static_cast<int>(frb.fem.reserved) << endl;
cout << "metadata_len\t= " << frb.fem.metadata_len << endl;
cout << "mask\t= " << hex << frb.fem.mask << dec << "\t" << fan_flag_ntoa(frb.fem.mask) << endl;
cout << "fd\t= " << frb.fem.fd << endl;
cout << "pid\t= " << frb.fem.pid << endl;
#endif
cout << "flags " << fan_flag_ntoa(frb.fem.mask) << " pid " << frb.fem.pid << ' ' << flush;
Fd event_fd(frb.fem.fd);
ostringstream oss;
oss << "/proc/self/fd/" << event_fd;
cout << "file " << readlink_or_die(oss.str()) << endl;
// cout << endl;
}
return EXIT_SUCCESS;
}