| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini lsof implementation for busybox |
| * |
| * Copyright (C) 2012 by Sven Oliver 'SvOlli' Moll <svolli@svolli.de> |
| * |
| * Licensed under GPLv2, see file LICENSE in this source tree. |
| */ |
| |
| //config:config LSOF |
| //config: bool "lsof (3.6 kb)" |
| //config: default y |
| //config: help |
| //config: Show open files in the format of: |
| //config: PID <TAB> /path/to/executable <TAB> /path/to/opened/file |
| |
| //applet:IF_LSOF(APPLET(lsof, BB_DIR_USR_BIN, BB_SUID_DROP)) |
| |
| //kbuild:lib-$(CONFIG_LSOF) += lsof.o |
| |
| //usage:#define lsof_trivial_usage |
| //usage: "" |
| //usage:#define lsof_full_usage "\n\n" |
| //usage: "Show all open files" |
| |
| #include "libbb.h" |
| |
| /* |
| * Examples of "standard" lsof output: |
| * |
| * COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME |
| * init 1 root cwd DIR 8,5 4096 2 / |
| * init 1 root rtd DIR 8,5 4096 2 / |
| * init 1 root txt REG 8,5 872400 63408 /app/busybox-1.19.2/busybox |
| * rpc.portm 1064 root mem REG 8,5 43494 47451 /app/glibc-2.11/lib/libnss_files-2.11.so |
| * rpc.portm 1064 root 3u IPv4 2178 UDP *:111 |
| * rpc.portm 1064 root 4u IPv4 1244 TCP *:111 (LISTEN) |
| * runsvdir 1116 root 0r CHR 1,3 1214 /dev/null |
| * runsvdir 1116 root 1w CHR 1,3 1214 /dev/null |
| * runsvdir 1116 root 2w CHR 1,3 1214 /dev/null |
| * runsvdir 1116 root 3r DIR 8,6 1560 58359 /.local/var/service |
| * gpm 1128 root 4u unix 0xffff88007c09ccc0 1302 /dev/gpmctl |
| */ |
| |
| int lsof_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int lsof_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) |
| { |
| procps_status_t *proc = NULL; |
| |
| while ((proc = procps_scan(proc, PSSCAN_PID|PSSCAN_EXE)) != NULL) { |
| char name[sizeof("/proc/%u/fd/0123456789") + sizeof(int)*3]; |
| unsigned baseofs; |
| DIR *d_fd; |
| char *fdlink; |
| struct dirent *entry; |
| |
| if (getpid() == proc->pid) |
| continue; |
| |
| baseofs = sprintf(name, "/proc/%u/fd/", proc->pid); |
| d_fd = opendir(name); |
| if (d_fd) { |
| while ((entry = readdir(d_fd)) != NULL) { |
| /* Skip entries '.' and '..' (and any hidden file) */ |
| if (entry->d_name[0] == '.') |
| continue; |
| |
| safe_strncpy(name + baseofs, entry->d_name, 10); |
| if ((fdlink = xmalloc_readlink(name)) != NULL) { |
| printf("%d\t%s\t%s\n", proc->pid, proc->exe, fdlink); |
| free(fdlink); |
| } |
| } |
| closedir(d_fd); |
| } |
| } |
| |
| return EXIT_SUCCESS; |
| } |