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/* 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 (3.7 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)
{
getopt32(argv, "^" "" "\0" "-1");
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;
}
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