Sven Oliver Moll | 1c12b67 | 2012-04-01 16:23:23 +0200 | [diff] [blame] | 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 (getpid() == 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 | if (entry->d_type == DT_LNK) { |
| 65 | safe_strncpy(name + baseofs, entry->d_name, 10); |
| 66 | fdlink = xmalloc_readlink(name); |
| 67 | printf("%d\t%s\t%s\n", proc->pid, proc->exe, fdlink); |
| 68 | free(fdlink); |
| 69 | } |
| 70 | } |
| 71 | closedir(d_fd); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | return EXIT_SUCCESS; |
| 76 | } |