/* 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" //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; }