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inotify-info/inotify-info.cpp

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Adding upstream version 0~20240209. Signed-off-by: Daniel Baumann <daniel@debian.org>
2025-02-05 15:16:24 +01:00
/*
* Copyright 2021 Michael Sartain
*
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#define _GNU_SOURCE 1
#include <limits.h>
#include <dirent.h>
#include <fcntl.h>
#include <getopt.h>
#include <pthread.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libgen.h>
#include <locale.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <syscall.h>
#include <unistd.h>
#include <sys/sysmacros.h>
#include <sys/statfs.h>
#include <cstdint>
#include <string>
#include <vector>
#include <algorithm>
#include <unordered_set>
#include <unordered_map>
#include "inotify-info.h"
#include "lfqueue/lfqueue.h"
/*
* TODO
* - Comments
* - Disable color
*/
static int g_verbose = 0;
static size_t g_numthreads = 32;
/* true if at least one inotify watch is found in fdinfo files
* On a system with no active inotify watches, but which otherwise
* supports inotify watch info, this will prevent the watches column
* from being displayed.
* This case is indistinguishable from the case where the kernel does
* not support inotify watch info.
*/
static int g_kernel_provides_watches_info = 0;
static char thousands_sep = ',';
static std::vector< std::string > ignore_dirs;
/*
* filename info
*/
struct filename_info_t
{
ino64_t inode; // Inode number
dev_t dev; // Device ID containing file
std::string filename;
};
/*
* inotify process info
*/
struct procinfo_t
{
pid_t pid = 0;
// uid
uid_t uid = 0;
// Count of inotify watches and instances
uint32_t watches = 0;
uint32_t instances = 0;
// This appname or pid found in command line?
bool in_cmd_line = false;
// Full executable path
std::string executable;
// Executable basename
std::string appname;
// Inotify fdset filenames
std::vector< std::string > fdset_filenames;
// Device id map -> set of inodes for that device id
std::unordered_map< dev_t, std::unordered_set< ino64_t > > dev_map;
};
class lfqueue_wrapper_t
{
public:
lfqueue_wrapper_t() { lfqueue_init( &queue ); }
~lfqueue_wrapper_t() { lfqueue_destroy( &queue ); }
void queue_directory( char *path ) { lfqueue_enq( &queue, path ); }
char *dequeue_directory() { return ( char * )lfqueue_deq( &queue ); }
public:
typedef long long my_m256i __attribute__((__vector_size__(32), __aligned__(32)));
union
{
lfqueue_t queue;
my_m256i align_buf[4]; // Align to 128 bytes
};
};
/*
* shared thread data
*/
class thread_shared_data_t
{
public:
bool init( uint32_t numthreads, const std::vector< procinfo_t > &inotify_proclist );
public:
// Array of queues - one per thread
std::vector< lfqueue_wrapper_t > dirqueues;
// Map of all inotify inodes watched to the set of devices they are on
std::unordered_map< ino64_t, std::unordered_set< dev_t > > inode_set;
};
/*
* thread info
*/
class thread_info_t
{
public:
thread_info_t( thread_shared_data_t &tdata_in ) : tdata( tdata_in ) {}
~thread_info_t() {}
void queue_directory( char *path );
char *dequeue_directory();
// Returns -1: queue empty, 0: open error, > 0 success
int parse_dirqueue_entry();
void add_filename( ino64_t inode, const char *path, const char *d_name, bool is_dir );
public:
uint32_t idx = 0;
pthread_t pthread_id = 0;
thread_shared_data_t &tdata;
// Total dirs scanned by this thread
uint32_t scanned_dirs = 0;
// Files found by this thread
std::vector< filename_info_t > found_files;
};
/*
* getdents64 syscall
*/
GCC_DIAG_PUSH_OFF( pedantic )
struct linux_dirent64
{
uint64_t d_ino; // Inode number
int64_t d_off; // Offset to next linux_dirent
unsigned short d_reclen; // Length of this linux_dirent
unsigned char d_type; // File type
char d_name[]; // Filename (null-terminated)
};
GCC_DIAG_POP()
int sys_getdents64( int fd, char *dirp, int count )
{
return syscall( SYS_getdents64, fd, dirp, count );
}
static double gettime()
{
struct timespec ts;
clock_gettime( CLOCK_MONOTONIC, &ts );
return ( double )ts.tv_sec + ( double )ts.tv_nsec / 1e9;
}
std::string string_formatv( const char *fmt, va_list ap )
{
std::string str;
int size = 512;
for ( ;; )
{
str.resize( size );
int n = vsnprintf( ( char * )str.c_str(), size, fmt, ap );
if ( ( n > -1 ) && ( n < size ) )
{
str.resize( n );
return str;
}
size = ( n > -1 ) ? ( n + 1 ) : ( size * 2 );
}
}
std::string string_format( const char *fmt, ... )
{
va_list ap;
std::string str;
va_start( ap, fmt );
str = string_formatv( fmt, ap );
va_end( ap );
return str;
}
static std::string get_link_name( const char *pathname )
{
std::string Result;
char filename[ PATH_MAX + 1 ];
ssize_t ret = readlink( pathname, filename, sizeof( filename ) );
if ( ( ret > 0 ) && ( ret < ( ssize_t )sizeof( filename ) ) )
{
filename[ ret ] = 0;
Result = filename;
}
return Result;
}
static uid_t get_uid(const char *pathname)
{
int fd = open( pathname, O_RDONLY, 0 );
if ( fd >= 0 )
{
char buf[ 16 * 1024 ];
ssize_t len = read( fd, buf, sizeof( buf ) );
close( fd );
fd = -1;
if ( len > 0 )
{
buf[ len - 1 ] = 0;
const char *uidstr = strstr( buf, "\nUid:" );
if ( uidstr )
{
return atoll( uidstr + 5 );
}
}
}
return -1;
}
static uint64_t get_token_val( const char *line, const char *token )
{
const char *str = strstr( line, token );
return str ? strtoull( str + strlen( token ), nullptr, 16 ) : 0;
}
static uint32_t inotify_parse_fdinfo_file( procinfo_t &procinfo, const char *fdset_name )
{
uint32_t watch_count = 0;
FILE *fp = fopen( fdset_name, "r" );
if ( fp )
{
char line_buf[ 256 ];
procinfo.fdset_filenames.push_back( fdset_name );
for ( ;; )
{
if ( !fgets( line_buf, sizeof( line_buf ), fp ) )
break;
/* sample fdinfo; inotify line added in linux 3.8, available if
* kernel compiled with CONFIG_INOTIFY_USER and CONFIG_PROC_FS
* pos: 0
* flags: 00
* mnt_id: 15
* ino: 5865
* inotify wd:1 ino:80001 sdev:800011 mask:100 ignored_mask:0 fhandle-bytes:8 fhandle-type:1 f_handle:01000800bc1b8c7c
*/
if ( !strncmp( line_buf, "inotify ", 8 ) )
{
watch_count++;
uint64_t inode_val = get_token_val( line_buf, "ino:" );
uint64_t sdev_val = get_token_val( line_buf, "sdev:" );
if ( inode_val )
{
// https://unix.stackexchange.com/questions/645937/listing-the-files-that-are-being-watched-by-inotify-instances
// Assuming that the sdev field is encoded according to Linux's so-called "huge
// encoding", which uses 20 bits (instead of 8) for minor numbers, in bitwise
// parlance the major number is sdev >> 20 while the minor is sdev & 0xfffff.
unsigned int major = sdev_val >> 20;
unsigned int minor = sdev_val & 0xfffff;
// Add inode to this device map
procinfo.dev_map[ makedev( major, minor ) ].insert( inode_val );
}
}
}
fclose( fp );
}
return watch_count;
}
static void inotify_parse_fddir( procinfo_t &procinfo )
{
std::string filename = string_format( "/proc/%d/fd", procinfo.pid );
DIR *dir_fd = opendir( filename.c_str() );
if ( !dir_fd )
return;
for ( ;; )
{
struct dirent *dp_fd = readdir( dir_fd );
if ( !dp_fd )
break;
if ( ( dp_fd->d_type == DT_LNK ) && isdigit( dp_fd->d_name[ 0 ] ) )
{
filename = string_format( "/proc/%d/fd/%s", procinfo.pid, dp_fd->d_name );
filename = get_link_name( filename.c_str() );
if ( filename == "anon_inode:inotify" || filename == "inotify" )
{
filename = string_format( "/proc/%d/fdinfo/%s", procinfo.pid, dp_fd->d_name );
procinfo.instances++;
procinfo.watches += inotify_parse_fdinfo_file( procinfo, filename.c_str() );
/* If any watches have been found, enable the stats display */
g_kernel_provides_watches_info |= !!procinfo.watches;
}
}
}
closedir( dir_fd );
}
void thread_info_t::queue_directory( char *path )
{
tdata.dirqueues[ idx ].queue_directory( path );
}
char *thread_info_t::dequeue_directory()
{
char *path = tdata.dirqueues[ idx ].dequeue_directory();
if ( !path )
{
// Nothing on our queue, check queues on other threads
for ( lfqueue_wrapper_t &dirq : tdata.dirqueues )
{
path = dirq.dequeue_directory();
if ( path )
break;
}
}
return path;
}
// statx() was added to Linux in kernel 4.11; library support was added in glibc 2.28.
#if defined( __linux__ ) && ( ( __GLIBC__ >= 2 && __GLIBC_MINOR__ >= 28 ) || ( __GLIBC__ > 2 ) )
struct statx mystatx( const char *filename, unsigned int mask = 0 )
{
struct statx statxbuf;
int flags = AT_NO_AUTOMOUNT | AT_SYMLINK_NOFOLLOW | AT_STATX_DONT_SYNC;
if ( statx( 0, filename, flags, mask, &statxbuf ) == -1 )
{
printf( "ERROR: statx-ino( %s ) failed. Errno: %d\n", filename, errno );
memset( &statxbuf, 0, sizeof( statxbuf ) );
}
return statxbuf;
}
static dev_t stat_get_dev_t( const char *filename )
{
struct statx statxbuf = mystatx( filename );
return makedev( statxbuf.stx_dev_major, statxbuf.stx_dev_minor );
}
static uint64_t stat_get_ino( const char *filename )
{
return mystatx( filename, STATX_INO ).stx_ino;
}
#else
// Fall back to using stat() functions. Should work but be slower than using statx().
static dev_t stat_get_dev_t( const char *filename )
{
struct stat statbuf;
int ret = stat( filename, &statbuf );
if ( ret == -1 )
{
printf( "ERROR: stat-dev_t( %s ) failed. Errno: %d\n", filename, errno );
return 0;
}
return statbuf.st_dev;
}
static uint64_t stat_get_ino( const char *filename )
{
struct stat statbuf;
int ret = stat( filename, &statbuf );
if ( ret == -1 )
{
printf( "ERROR: stat-ino( %s ) failed. Errno: %d\n", filename, errno );
return 0;
}
return statbuf.st_ino;
}
#endif
void thread_info_t::add_filename( ino64_t inode, const char *path, const char *d_name, bool is_dir )
{
auto it = tdata.inode_set.find( inode );
if ( it != tdata.inode_set.end() )
{
const std::unordered_set< dev_t > &dev_set = it->second;
std::string filename = std::string( path ) + d_name;
dev_t dev = stat_get_dev_t( filename.c_str() );
// Make sure the inode AND device ID match before adding.
if ( dev_set.find( dev ) != dev_set.end() )
{
filename_info_t fname;
fname.filename = is_dir ? filename + "/" : filename;
fname.inode = inode;
fname.dev = dev;
found_files.push_back( fname );
}
}
}
static bool is_dot_dir( const char *dname )
{
if ( dname[ 0 ] == '.' )
{
if ( !dname[ 1 ] )
return true;
if ( ( dname[ 1 ] == '.' ) && !dname[ 2 ] )
return true;
}
return false;
}
// From "linux/magic.h"
#define PROC_SUPER_MAGIC 0x9fa0
#define SMB_SUPER_MAGIC 0x517B
#define CIFS_SUPER_MAGIC 0xFF534D42 /* the first four bytes of SMB PDUs */
#define SMB2_SUPER_MAGIC 0xFE534D42
#define FUSE_SUPER_MAGIC 0x65735546
// Detect proc and fuse directories and skip them.
// https://github.com/mikesart/inotify-info/issues/6
// Could use setmntent("/proc/mounts", "r") + getmntent if speed is an issue?
static bool is_proc_dir( const char *path, const char *d_name )
{
struct statfs s;
std::string filename = std::string( path ) + d_name;
if ( statfs(filename.c_str(), &s ) == 0 )
{
switch ( s.f_type )
{
case PROC_SUPER_MAGIC:
case FUSE_SUPER_MAGIC:
return true;
}
}
return false;
}
// Returns -1: queue empty, 0: open error, > 0 success
int thread_info_t::parse_dirqueue_entry()
{
char __attribute__( ( aligned( 16 ) ) ) buf[ 1024 ];
char *path = dequeue_directory();
if ( !path )
{
return -1;
}
for ( std::string &dname : ignore_dirs )
{
if ( dname == path )
{
if ( g_verbose > 1 )
{
printf( "Ignoring '%s'\n", path );
}
return 0;
}
}
int fd = open( path, O_RDONLY | O_DIRECTORY, 0 );
if ( fd < 0 )
{
free( path );
return 0;
}
scanned_dirs++;
size_t pathlen = strlen( path );
for ( ;; )
{
int ret = sys_getdents64( fd, buf, sizeof( buf ) );
if ( ret < 0 )
{
bool spew_error = true;
if ( ( errno == 5 ) && !strncmp( path, "/sys/kernel/", 12 ) )
{
// In docker container we can get permission denied errors in /sys/kernel. Ignore them.
// https://github.com/mikesart/inotify-info/issues/16
spew_error = false;
}
if ( spew_error )
{
printf( "ERROR: sys_getdents64 failed on '%s': %d errno:%d\n", path, ret, errno );
}
break;
}
if ( ret == 0 )
break;
for ( int bpos = 0; bpos < ret; )
{
struct linux_dirent64 *dirp = ( struct linux_dirent64 * )( buf + bpos );
const char *d_name = dirp->d_name;
// DT_BLK This is a block device.
// DT_CHR This is a character device.
// DT_FIFO This is a named pipe (FIFO).
// DT_SOCK This is a UNIX domain socket.
// DT_UNKNOWN The file type could not be determined.
// DT_REG This is a regular file.
// DT_LNK This is a symbolic link.
if ( dirp->d_type == DT_REG || dirp->d_type == DT_LNK )
{
add_filename( dirp->d_ino, path, d_name, false );
}
// DT_DIR This is a directory.
else if ( dirp->d_type == DT_DIR )
{
if ( !is_dot_dir( d_name ) && !is_proc_dir( path, d_name ) )
{
add_filename( dirp->d_ino, path, d_name, true );
size_t len = strlen( d_name );
char *newpath = ( char * )malloc( pathlen + len + 2 );
if ( newpath )
{
strcpy( newpath, path );
strcpy( newpath + pathlen, d_name );
newpath[ pathlen + len ] = '/';
newpath[ pathlen + len + 1 ] = 0;
queue_directory( newpath );
}
}
}
bpos += dirp->d_reclen;
}
}
close( fd );
free( path );
return 1;
}
static void *parse_dirqueue_threadproc( void *arg )
{
thread_info_t *pthread_info = ( thread_info_t * )arg;
for ( ;; )
{
// Loop until all the dequeue(s) fail
if ( pthread_info->parse_dirqueue_entry() == -1 )
break;
}
return nullptr;
}
static bool is_proc_in_cmdline_applist( const procinfo_t &procinfo, std::vector< std::string > &cmdline_applist )
{
for ( const std::string &str : cmdline_applist )
{
// Check if our command line string is a subset of this appname
if ( strstr( procinfo.appname.c_str(), str.c_str() ) )
return true;
// Check if the PIDs match
if ( atoll( str.c_str() ) == procinfo.pid )
return true;
}
return false;
}
static bool watch_count_is_greater ( procinfo_t elem1, procinfo_t elem2 )
{
return elem1.watches > elem2.watches;
}
static bool init_inotify_proclist( std::vector< procinfo_t > &inotify_proclist )
{
DIR *dir_proc = opendir( "/proc" );
if ( !dir_proc )
{
printf( "ERROR: opendir /proc failed: %d\n", errno );
return false;
}
for ( ;; )
{
struct dirent *dp_proc = readdir( dir_proc );
if ( !dp_proc )
break;
if ( ( dp_proc->d_type == DT_DIR ) && isdigit( dp_proc->d_name[ 0 ] ) )
{
procinfo_t procinfo;
procinfo.pid = atoll( dp_proc->d_name );
std::string executable = string_format( "/proc/%d/exe", procinfo.pid );
std::string status = string_format( "/proc/%d/status", procinfo.pid );
procinfo.uid = get_uid( status.c_str() );
procinfo.executable = get_link_name( executable.c_str() );
if ( !procinfo.executable.empty() )
{
procinfo.appname = basename( (char*)procinfo.executable.c_str() );
inotify_parse_fddir( procinfo );
if ( procinfo.instances )
{
inotify_proclist.push_back( procinfo );
}
}
}
}
std::sort(inotify_proclist.begin(), inotify_proclist.end(), watch_count_is_greater);
closedir( dir_proc );
return true;
}
// From:
// https://stackoverflow.com/questions/1449805/how-to-format-a-number-using-comma-as-thousands-separator-in-c
size_t str_format_uint32( char dst[16], uint32_t num )
{
if ( thousands_sep )
{
char src[16];
char *p_src = src;
char *p_dst = dst;
int num_len, commas;
num_len = sprintf(src, "%u", num);
for (commas = 2 - num_len % 3; *p_src; commas = (commas + 1) % 3)
{
*p_dst++ = *p_src++;
if (commas == 1) {
*p_dst++ = thousands_sep;
}
}
*--p_dst = '\0';
return (size_t)(p_dst - dst);
}
return sprintf(dst, "%u", num);
}
static void print_inotify_proclist( std::vector< procinfo_t > &inotify_proclist )
{
#if 0
// test data
procinfo_t proc_info = {};
proc_info.pid = 100;
proc_info.appname = "fsnotifier";
proc_info.watches = 2;
proc_info.instances = 1;
inotify_proclist.push_back(proc_info);
proc_info.pid = 1000;
proc_info.appname = "evolution-addressbook-factor";
proc_info.watches = 116;
proc_info.instances = 10;
inotify_proclist.push_back(proc_info);
proc_info.pid = 22154;
proc_info.appname = "evolution-addressbook-factor blah blah";
proc_info.watches = 28200;
proc_info.instances = 100;
inotify_proclist.push_back(proc_info);
proc_info.pid = 0x7fffffff;
proc_info.appname = "evolution-addressbook-factor blah blah2";
proc_info.watches = 999999;
proc_info.instances = 999999999;
inotify_proclist.push_back(proc_info);
#endif
int lenPid = 10;
int lenUid = 10;
int lenApp = 10;
int lenWatches = 8;
int lenInstances = 10;
for ( procinfo_t &procinfo : inotify_proclist )
lenApp = std::max<int>( procinfo.appname.length(), lenApp );
/* If the number of watches is negative, the kernel doesn't support this info. omit the header*/
if (g_kernel_provides_watches_info)
printf( "%s%*s %-*s %-*s %*s %*s%s\n",
BCYAN, lenPid, "Pid", lenUid, "Uid", lenApp, "App", lenWatches, "Watches", lenInstances, "Instances", RESET);
else
printf( "%s%*s %-*s %*s %*s%s\n",
BCYAN, lenPid, "Pid", lenUid, "Uid", lenApp, "App", lenInstances, "Instances", RESET);
for ( procinfo_t &procinfo : inotify_proclist )
{
char watches_str[16];
str_format_uint32(watches_str, procinfo.watches);
if (g_kernel_provides_watches_info)
printf( "%*d %-*d %s%-*s%s %*s %*u\n",
lenPid, procinfo.pid,
lenUid, procinfo.uid,
BYELLOW, lenApp, procinfo.appname.c_str(), RESET,
lenWatches, watches_str,
lenInstances, procinfo.instances );
else
printf( "%*d %-*d %s%-*s%s %*u\n",
lenPid, procinfo.pid,
lenUid, procinfo.uid,
BYELLOW, lenApp, procinfo.appname.c_str(), RESET,
lenInstances, procinfo.instances );
if ( g_verbose > 1 )
{
for ( std::string &fname : procinfo.fdset_filenames )
{
printf( " %s%s%s\n", CYAN, fname.c_str(), RESET );
}
}
if ( procinfo.in_cmd_line )
{
for ( const auto &it1 : procinfo.dev_map )
{
dev_t dev = it1.first;
printf( "%s[%u.%u]:%s", BGRAY, major( dev ), minor( dev ), RESET );
for ( const auto &it2 : it1.second )
{
std::string inode_device_str = string_format( "%lu", it2 );
printf( " %s%s%s", BGRAY, inode_device_str.c_str(), RESET );
}
printf( "\n" );
}
}
}
}
bool thread_shared_data_t::init( uint32_t numthreads, const std::vector< procinfo_t > &inotify_proclist )
{
for ( const procinfo_t &procinfo : inotify_proclist )
{
if ( !procinfo.in_cmd_line )
continue;
for ( const auto &it1 : procinfo.dev_map )
{
dev_t dev = it1.first;
for ( const auto &inode : it1.second )
{
inode_set[ inode ].insert( dev );
}
}
}
if ( !inode_set.empty() )
{
dirqueues.resize( numthreads );
}
return !inode_set.empty();
}
static uint32_t find_files_in_inode_set( const std::vector< procinfo_t > &inotify_proclist,
std::vector< filename_info_t > &all_found_files )
{
thread_shared_data_t tdata;
g_numthreads = std::max< size_t >( 1, g_numthreads );
if ( !tdata.init( g_numthreads, inotify_proclist ) )
return 0;
printf( "\n%sSearching '/' for listed inodes...%s (%lu threads)\n", BCYAN, RESET, g_numthreads );
// Initialize thread_info_t array
std::vector< class thread_info_t > thread_array( g_numthreads, thread_info_t( tdata ) );
for ( uint32_t idx = 0; idx < thread_array.size(); idx++ )
{
thread_info_t &thread_info = thread_array[ idx ];
thread_info.idx = idx;
if ( idx == 0 )
{
// Add root dir in case someone is watching it
thread_info.add_filename( stat_get_ino( "/" ), "/", "", false );
// Add and parse root
thread_info.queue_directory( strdup( "/" ) );
thread_info.parse_dirqueue_entry();
}
else if ( pthread_create( &thread_info.pthread_id, NULL, &parse_dirqueue_threadproc, &thread_info ) )
{
printf( "Warning: pthread_create failed. errno: %d\n", errno );
thread_info.pthread_id = 0;
}
}
// Put main thread to work
parse_dirqueue_threadproc( &thread_array[ 0 ] );
uint32_t total_scanned_dirs = 0;
for ( const thread_info_t &thread_info : thread_array )
{
if ( thread_info.pthread_id )
{
if ( g_verbose > 1 )
{
printf( "Waiting for thread #%zu\n", thread_info.pthread_id );
}
void *status = NULL;
int rc = pthread_join( thread_info.pthread_id, &status );
if ( g_verbose > 1 )
{
printf( "Thread #%zu rc=%d status=%d\n", thread_info.pthread_id, rc, ( int )( intptr_t )status );
}
}
// Snag data from this thread
total_scanned_dirs += thread_info.scanned_dirs;
all_found_files.insert( all_found_files.end(),
thread_info.found_files.begin(), thread_info.found_files.end() );
if ( g_verbose > 1 )
{
printf( "Thread #%zu: %u dirs, %zu files found\n",
thread_info.pthread_id, thread_info.scanned_dirs, thread_info.found_files.size() );
}
}
struct
{
bool operator()( const filename_info_t &a, const filename_info_t &b ) const
{
if ( a.dev == b.dev )
return a.inode < b.inode;
return a.dev < b.dev;
}
} filename_info_less_func;
std::sort( all_found_files.begin(), all_found_files.end(), filename_info_less_func );
return total_scanned_dirs;
}
static uint32_t get_inotify_procfs_value( const std::string &fname )
{
char buf[ 64 ];
uint32_t val = 0;
std::string filename = "/proc/sys/fs/inotify/" + fname;
int fd = open( filename.c_str(), O_RDONLY );
if ( fd >= 0 )
{
if ( read( fd, buf, sizeof( buf ) ) > 0 )
{
val = strtoul( buf, nullptr, 10 );
}
close( fd );
}
return val;
}
static void print_inotify_limits()
{
const std::vector< std::string > filenames =
{
"max_queued_events",
"max_user_instances",
"max_user_watches"
};
printf( "%sINotify Limits:%s\n", BCYAN, RESET );
for ( const std::string &fname : filenames )
{
char str[16];
uint32_t val = get_inotify_procfs_value( fname );
str_format_uint32(str, val);
printf( " %-20s %s%s%s\n", fname.c_str(), BGREEN, str, RESET );
}
}
static uint32_t parse_config_file( const char *config_file )
{
uint32_t dir_count = 0;
FILE *fp = fopen( config_file, "r" );
if ( fp )
{
char line_buf[ 8192 ];
bool in_ignore_dirs_section = false;
for ( ;; )
{
if ( !fgets( line_buf, sizeof( line_buf ) - 1, fp ) )
break;
if ( line_buf[0] == '#' )
{
// comment
}
else if ( !in_ignore_dirs_section )
{
size_t len = strcspn( line_buf, "\r\n" );
if ( ( len == 12 ) && !strncmp( "[ignoredirs]", line_buf, 12 ) )
{
in_ignore_dirs_section = true;
}
}
else if ( line_buf[ 0 ] == '[' )
{
in_ignore_dirs_section = false;
}
else if ( in_ignore_dirs_section && ( line_buf[ 0 ] == '/' ) )
{
size_t len = strcspn( line_buf, "\r\n" );
if ( len > 1 )
{
line_buf[ len ] = 0;
if ( line_buf[ len - 1 ] != '/' )
{
line_buf[ len ] = '/';
line_buf[ len + 1 ] = '\0';
}
ignore_dirs.push_back( line_buf );
dir_count++;
}
}
}
fclose( fp );
}
return dir_count;
}
static bool parse_ignore_dirs_file()
{
const std::string filename = "inotify-info.config";
const char *xdg_config_dir = getenv( "XDG_CONFIG_HOME" );
if ( xdg_config_dir )
{
std::string config_file = std::string( xdg_config_dir ) + "/" + filename;
if ( parse_config_file( config_file.c_str() ) )
return true;
config_file = std::string( xdg_config_dir) + "/.config/" + filename;
if ( parse_config_file( config_file.c_str() ) )
return true;
}
const char *home_dir = getenv( "HOME" );
if ( home_dir )
{
std::string config_file = std::string( home_dir ) + "/" + filename;
if ( parse_config_file( config_file.c_str() ) )
return true;
}
std::string config_file = "/etc/" + filename;
if ( parse_config_file( config_file.c_str() ) )
return true;
return false;
}
static void print_usage( const char *appname )
{
printf( "Usage: %s [--threads=##] [appname | pid...]\n", appname );
printf( " [-vv]\n" );
printf( " [-?|-h|--help]\n" );
exit( -1 );
}
static void parse_cmdline( int argc, char **argv, std::vector< std::string > &cmdline_applist )
{
static struct option long_opts[] =
{
{ "verbose", no_argument, 0, 0 },
{ "threads", required_argument, 0, 0 },
{ "ignoredir", required_argument, 0, 0 },
{ 0, 0, 0, 0 }
};
// Let's pick the number of processors online (with a max of 32) for a default.
g_numthreads = std::min< uint32_t >( g_numthreads, sysconf( _SC_NPROCESSORS_ONLN ) );
int c;
int opt_ind = 0;
while ( ( c = getopt_long( argc, argv, "m:s:?hv", long_opts, &opt_ind ) ) != -1 )
{
switch ( c )
{
case 0:
if ( !strcasecmp( "verbose", long_opts[ opt_ind ].name ) )
g_verbose++;
else if ( !strcasecmp( "threads", long_opts[ opt_ind ].name ) )
g_numthreads = atoi( optarg );
else if ( !strcasecmp( "ignoredir", long_opts[ opt_ind ].name ) )
{
std::string dirname = optarg;
if ( dirname.size() > 1 )
{
if ( optarg[ dirname.size() - 1 ] != '/' )
dirname += "/";
ignore_dirs.push_back( dirname );
}
}
break;
case 'v':
g_verbose++;
break;
case 'h':
case '?':
default:
print_usage( argv[ 0 ] );
break;
}
}
for ( ; optind < argc; optind++ )
{
cmdline_applist.push_back( argv[ optind ] );
}
parse_ignore_dirs_file();
if ( g_verbose > 1 )
{
printf( "%lu ignore_dirs:\n", ignore_dirs.size() );
for ( std::string &dname : ignore_dirs )
{
printf( " '%s'\n", dname.c_str() );
}
}
}
static void print_separator()
{
printf( "%s%s%s\n", YELLOW, std::string( 78, '-' ).c_str(), RESET );
}
int main( int argc, char *argv[] )
{
std::vector< std::string > cmdline_applist;
std::vector< procinfo_t > inotify_proclist;
struct lconv *env = localeconv();
if (env && env->thousands_sep && env->thousands_sep[0])
{
thousands_sep = env->thousands_sep[0];
}
parse_cmdline( argc, argv, cmdline_applist );
print_separator();
print_inotify_limits();
print_separator();
if ( init_inotify_proclist( inotify_proclist ) )
{
uint32_t total_watches = 0;
uint32_t total_instances = 0;
std::vector< filename_info_t > all_found_files;
for ( procinfo_t &procinfo : inotify_proclist )
{
procinfo.in_cmd_line = is_proc_in_cmdline_applist( procinfo, cmdline_applist );
total_watches += procinfo.watches;
total_instances += procinfo.instances;
}
if (inotify_proclist.size()) {
print_inotify_proclist( inotify_proclist );
print_separator();
}
if (g_kernel_provides_watches_info)
printf( "Total inotify Watches: %s%u%s\n", BGREEN, total_watches, RESET );
printf( "Total inotify Instances: %s%u%s\n", BGREEN, total_instances, RESET );
print_separator();
double search_time = gettime();
uint32_t total_scanned_dirs = find_files_in_inode_set( inotify_proclist, all_found_files );
if ( total_scanned_dirs )
{
search_time = gettime() - search_time;
for ( const filename_info_t &fname_info : all_found_files )
{
printf( "%s%9lu%s [%u:%u] %s\n", BGREEN, fname_info.inode, RESET,
major( fname_info.dev ), minor( fname_info.dev ),
fname_info.filename.c_str() );
}
setlocale( LC_NUMERIC, "" );
GCC_DIAG_PUSH_OFF( format )
printf( "\n%'u dirs scanned (%.2f seconds)\n", total_scanned_dirs, search_time );
GCC_DIAG_POP()
}
}
return 0;
}
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