cf8b55c40
Pere Orga
2011-03-12
Subject
pwdx: new applet
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procps/pwdx.c+60 -0
| @@ -0,0 +1,60 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * pwdx implementation for busybox |
| + | * |
| + | * Copyright (c) 2004 Nicholas Miell |
| + | * ported from procps by Pere Orga <[email protected]> 2011 |
| + | * |
| + | * Licensed under GPLv2, see file LICENSE in this source tree. |
| + | */ |
| + | |
| + | //config:config PWDX |
| + | //config: bool "pwdx" |
| + | //config: default y |
| + | //config: help |
| + | //config: Report current working directory of a process |
| + | |
| + | //applet:IF_PWDX(APPLET(pwdx, BB_DIR_USR_BIN, BB_SUID_DROP)) |
| + | |
| + | //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\n" |
| + | |
| + | #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 (strncmp(arg, "/proc/", 6) == 0) |
| + | 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); |
| + | |
| + | 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; |
| + | } |