From 1c12b67705a4a2d5854d5e62fcbd2b241852ffe9 Mon Sep 17 00:00:00 2001
From: Sven Oliver Moll <busybox@svol.li>
Date: Sun, 1 Apr 2012 16:23:23 +0200
Subject: lsof: new applet
text data bss dec hex filename
221 0 0 221 dd lsof.o
Signed-off-by: Sven Oliver Moll <busybox@svol.li>
Signed-off-by: souf <souf_oued@yahoo.fr>
Signed-off-by: Tito Ragusa <farmatito@tiscali.it>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---
procps/lsof.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 76 insertions(+)
create mode 100644 procps/lsof.c
diff --git a/procps/lsof.c b/procps/lsof.c
new file mode 100644
index 000000000..7e0ffa4e5
--- /dev/null
+++ b/procps/lsof.c
@@ -0,0 +1,76 @@
+/* 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) {
+ if (entry->d_type == DT_LNK) {
+ safe_strncpy(name + baseofs, entry->d_name, 10);
+ fdlink = xmalloc_readlink(name);
+ printf("%d\t%s\t%s\n", proc->pid, proc->exe, fdlink);
+ free(fdlink);
+ }
+ }
+ closedir(d_fd);
+ }
+ }
+
+ return EXIT_SUCCESS;
+}
--
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