1 /* vi: set sw=4 ts=4: */
3 * Mini lsof implementation for busybox
5 * Copyright (C) 2012 by Sven Oliver 'SvOlli' Moll <svolli@svolli.de>
7 * Licensed under GPLv2, see file LICENSE in this source tree.
11 //config: bool "lsof (3.6 kb)"
14 //config: Show open files in the format of:
15 //config: PID <TAB> /path/to/executable <TAB> /path/to/opened/file
17 //applet:IF_LSOF(APPLET(lsof, BB_DIR_USR_BIN, BB_SUID_DROP))
19 //kbuild:lib-$(CONFIG_LSOF) += lsof.o
21 //usage:#define lsof_trivial_usage
23 //usage:#define lsof_full_usage "\n\n"
24 //usage: "Show all open files"
29 * Examples of "standard" lsof output:
31 * COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
32 * init 1 root cwd DIR 8,5 4096 2 /
33 * init 1 root rtd DIR 8,5 4096 2 /
34 * init 1 root txt REG 8,5 872400 63408 /app/busybox-1.19.2/busybox
35 * rpc.portm 1064 root mem REG 8,5 43494 47451 /app/glibc-2.11/lib/libnss_files-2.11.so
36 * rpc.portm 1064 root 3u IPv4 2178 UDP *:111
37 * rpc.portm 1064 root 4u IPv4 1244 TCP *:111 (LISTEN)
38 * runsvdir 1116 root 0r CHR 1,3 1214 /dev/null
39 * runsvdir 1116 root 1w CHR 1,3 1214 /dev/null
40 * runsvdir 1116 root 2w CHR 1,3 1214 /dev/null
41 * runsvdir 1116 root 3r DIR 8,6 1560 58359 /.local/var/service
42 * gpm 1128 root 4u unix 0xffff88007c09ccc0 1302 /dev/gpmctl
45 int lsof_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
46 int lsof_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
48 procps_status_t *proc = NULL;
50 while ((proc = procps_scan(proc, PSSCAN_PID|PSSCAN_EXE)) != NULL) {
51 char name[sizeof("/proc/%u/fd/0123456789") + sizeof(int)*3];
57 if (getpid() == proc->pid)
60 baseofs = sprintf(name, "/proc/%u/fd/", proc->pid);
63 while ((entry = readdir(d_fd)) != NULL) {
64 /* Skip entries '.' and '..' (and any hidden file) */
65 if (entry->d_name[0] == '.')
68 safe_strncpy(name + baseofs, entry->d_name, 10);
69 if ((fdlink = xmalloc_readlink(name)) != NULL) {
70 printf("%d\t%s\t%s\n", proc->pid, proc->exe, fdlink);