| /* vi: set sw=4 ts=4: */ |
| /* |
| * pwdx implementation for busybox |
| * |
| * Copyright (c) 2004 Nicholas Miell |
| * ported from procps by Pere Orga <gotrunks@gmail.com> 2011 |
| * |
| * Licensed under GPLv2, see file LICENSE in this source tree. |
| */ |
| |
| //config:config PWDX |
| //config: bool "pwdx (3.5 kb)" |
| //config: default y |
| //config: help |
| //config: Report current working directory of a process |
| |
| //applet:IF_PWDX(APPLET_NOFORK(pwdx, pwdx, BB_DIR_USR_BIN, BB_SUID_DROP, pwdx)) |
| |
| //kbuild:lib-$(CONFIG_PWDX) += pwdx.o |
| |
| //usage:#define pwdx_trivial_usage |
| //usage: "PID..." |
| //usage:#define pwdx_full_usage "\n\n" |
| //usage: "Show current directory for PIDs" |
| |
| #include "libbb.h" |
| |
| int pwdx_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int pwdx_main(int argc UNUSED_PARAM, char **argv) |
| { |
| opt_complementary = "-1"; |
| getopt32(argv, ""); |
| argv += optind; |
| |
| do { |
| char buf[sizeof("/proc/%u/cwd") + sizeof(int)*3]; |
| unsigned pid; |
| char *s; |
| char *arg = *argv; |
| |
| // Allowed on the command line: |
| // /proc/NUM |
| // NUM |
| if (is_prefixed_with(arg, "/proc/")) |
| arg += 6; |
| |
| pid = bb_strtou(arg, NULL, 10); |
| if (errno) |
| bb_error_msg_and_die("invalid process id: '%s'", arg); |
| |
| sprintf(buf, "/proc/%u/cwd", pid); |
| |
| /* NOFORK: only one alloc is allowed; must free */ |
| s = xmalloc_readlink(buf); |
| // "pwdx /proc/1" says "/proc/1: DIR", not "1: DIR" |
| printf("%s: %s\n", *argv, s ? s : strerror(errno == ENOENT ? ESRCH : errno)); |
| free(s); |
| } while (*++argv); |
| |
| return EXIT_SUCCESS; |
| } |