1 /* vi: set sw=4 ts=4: */
3 * pwdx implementation for busybox
5 * Copyright (c) 2004 Nicholas Miell
6 * ported from procps by Pere Orga <gotrunks@gmail.com> 2011
8 * Licensed under GPLv2, see file LICENSE in this source tree.
12 //config: bool "pwdx (3.5 kb)"
15 //config: Report current working directory of a process
17 //applet:IF_PWDX(APPLET_NOFORK(pwdx, pwdx, BB_DIR_USR_BIN, BB_SUID_DROP, pwdx))
19 //kbuild:lib-$(CONFIG_PWDX) += pwdx.o
21 //usage:#define pwdx_trivial_usage
23 //usage:#define pwdx_full_usage "\n\n"
24 //usage: "Show current directory for PIDs"
28 int pwdx_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
29 int pwdx_main(int argc UNUSED_PARAM, char **argv)
31 getopt32(argv, "^" "" "\0" "-1");
35 char buf[sizeof("/proc/%u/cwd") + sizeof(int)*3];
40 // Allowed on the command line:
43 if (is_prefixed_with(arg, "/proc/"))
46 pid = bb_strtou(arg, NULL, 10);
48 bb_error_msg_and_die("invalid process id: '%s'", arg);
50 sprintf(buf, "/proc/%u/cwd", pid);
52 /* NOFORK: only one alloc is allowed; must free */
53 s = xmalloc_readlink(buf);
54 // "pwdx /proc/1" says "/proc/1: DIR", not "1: DIR"
55 printf("%s: %s\n", *argv, s ? s : strerror(errno == ENOENT ? ESRCH : errno));