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/*
* lsfd(1) - list file descriptors
*
* Copyright (C) 2021 Red Hat, Inc. All rights reserved.
* Written by Masatake YAMATO <yamato@redhat.com>
*
* Very generally based on lsof(8) by Victor A. Abell <abe@purdue.edu>
* It supports multiple OSes. lsfd specializes to Linux.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef UTIL_LINUX_LSFD_H
#define UTIL_LINUX_LSFD_H
#include <stdbool.h>
#include <sys/stat.h>
#include <dirent.h>
#include <inttypes.h>
#include "list.h"
#include "strutils.h"
/*
* column IDs
*/
enum {
COL_ASSOC,
COL_BLKDRV,
COL_CHRDRV,
COL_COMMAND,
COL_DELETED,
COL_DEV,
COL_DEVTYPE,
COL_ENDPOINTS,
COL_FD,
COL_FLAGS,
COL_INODE,
COL_KTHREAD,
COL_MAJMIN,
COL_MAPLEN,
COL_MISCDEV,
COL_MNT_ID,
COL_MODE,
COL_NAME,
COL_NLINK,
COL_PARTITION,
COL_PID,
COL_POS,
COL_PROTONAME,
COL_RDEV,
COL_SIZE,
COL_SOURCE,
COL_TID,
COL_TYPE,
COL_UID, /* process */
COL_USER, /* process */
COL_FUID, /* file */
COL_OWNER, /* file */
LSFD_N_COLS /* This must be at last. */
};
/*
* Process structure
*/
enum association {
ASSOC_EXE = 1,
ASSOC_CWD,
ASSOC_ROOT,
ASSOC_NS_CGROUP,
ASSOC_NS_IPC,
ASSOC_NS_MNT,
ASSOC_NS_NET,
ASSOC_NS_PID,
ASSOC_NS_PID4C,
ASSOC_NS_TIME,
ASSOC_NS_TIME4C,
ASSOC_NS_USER,
ASSOC_NS_UTS,
ASSOC_MEM, /* private file mapping */
ASSOC_SHM, /* shared file mapping */
N_ASSOCS,
};
struct proc {
pid_t pid;
struct proc * leader;
char *command;
uid_t uid;
ino_t ns_mnt;
struct list_head procs;
struct list_head files;
unsigned int kthread: 1;
};
/*
* File class
*/
struct file {
struct list_head files;
const struct file_class *class;
int association;
char *name;
struct stat stat;
mode_t mode;
struct proc *proc;
uint64_t pos;
uint64_t map_start;
uint64_t map_end;
unsigned int sys_flags;
unsigned int mnt_id;
};
#define is_association(_f, a) ((_f)->association < 0 && (_f)->association == -ASSOC_ ## a)
struct file_class {
const struct file_class *super;
size_t size;
void (*initialize_class)(void);
void (*finalize_class)(void);
bool (*fill_column)(struct proc *proc,
struct file *file,
struct libscols_line *ln,
int column_id,
size_t column_index);
int (*handle_fdinfo)(struct file *file, const char *key, const char* value);
void (*initialize_content)(struct file *file);
void (*free_content)(struct file *file);
struct ipc_class *(*get_ipc_class)(struct file *file);
};
extern const struct file_class file_class, cdev_class, bdev_class, sock_class, unkn_class, fifo_class;
/*
* IPC
*/
struct ipc {
const struct ipc_class *class;
struct list_head endpoints;
struct list_head ipcs;
};
struct ipc_endpoint {
struct ipc *ipc;
struct list_head endpoints;
};
struct ipc_class {
unsigned int (*get_hash)(struct file *file);
bool (*is_suitable_ipc)(struct ipc *ipc, struct file *file);
void (*free)(struct ipc *ipc);
};
struct ipc *get_ipc(struct file *file);
void add_ipc(struct ipc *ipc, unsigned int hash);
/*
* Name managing
*/
struct name_manager;
struct name_manager *new_name_manager(void);
void free_name_manager(struct name_manager *nm);
const char *get_name(struct name_manager *nm, unsigned long id);
unsigned long add_name(struct name_manager *nm, const char *name);
const char *get_partition(dev_t dev);
const char *get_blkdrv(unsigned long major);
const char *get_chrdrv(unsigned long major);
const char *get_miscdev(unsigned long minor);
const char *get_nodev_filesystem(unsigned long minor);
static inline void xstrappend(char **a, const char *b)
{
if (strappend(a, b) < 0)
err(XALLOC_EXIT_CODE, _("failed to allocate memory for string"));
}
static inline void xstrputc(char **a, char c)
{
char b[] = {c, '\0'};
xstrappend(a, b);
}
#endif /* UTIL_LINUX_LSFD_H */