blob: 281a55c5ba02e518058eaf8a8ca9e82385b7ca68
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini lsof implementation for busybox |
4 | * |
5 | * Copyright (C) 2012 by Sven Oliver 'SvOlli' Moll <svolli@svolli.de> |
6 | * |
7 | * Licensed under GPLv2, see file LICENSE in this source tree. |
8 | */ |
9 | |
10 | //config:config LSOF |
11 | //config: bool "lsof" |
12 | //config: default y |
13 | //config: help |
14 | //config: Show open files in the format of: |
15 | //config: PID <TAB> /path/to/executable <TAB> /path/to/opened/file |
16 | |
17 | //applet:IF_LSOF(APPLET(lsof, BB_DIR_USR_BIN, BB_SUID_DROP)) |
18 | |
19 | //kbuild:lib-$(CONFIG_LSOF) += lsof.o |
20 | |
21 | //usage:#define lsof_trivial_usage |
22 | //usage: "" |
23 | //usage:#define lsof_full_usage "\n\n" |
24 | //usage: "Show all open files" |
25 | |
26 | #include "libbb.h" |
27 | |
28 | /* |
29 | * Examples of "standard" lsof output: |
30 | * |
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 |
43 | */ |
44 | |
45 | int lsof_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
46 | int lsof_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) |
47 | { |
48 | procps_status_t *proc = NULL; |
49 | |
50 | while ((proc = procps_scan(proc, PSSCAN_PID|PSSCAN_EXE)) != NULL) { |
51 | char name[sizeof("/proc/%u/fd/0123456789") + sizeof(int)*3]; |
52 | unsigned baseofs; |
53 | DIR *d_fd; |
54 | char *fdlink; |
55 | struct dirent *entry; |
56 | |
57 | if ((pid_t) getpid() == (pid_t) proc->pid) |
58 | continue; |
59 | |
60 | baseofs = sprintf(name, "/proc/%u/fd/", proc->pid); |
61 | d_fd = opendir(name); |
62 | if (d_fd) { |
63 | while ((entry = readdir(d_fd)) != NULL) { |
64 | /* Skip entries '.' and '..' (and any hidden file) */ |
65 | if (entry->d_name[0] == '.') |
66 | continue; |
67 | |
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); |
71 | free(fdlink); |
72 | } |
73 | } |
74 | closedir(d_fd); |
75 | } |
76 | } |
77 | |
78 | return EXIT_SUCCESS; |
79 | } |
80 |