[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/procps/pwdx.c b/ap/app/busybox/src/procps/pwdx.c
new file mode 100644
index 0000000..7818104
--- /dev/null
+++ b/ap/app/busybox/src/procps/pwdx.c
@@ -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 <gotrunks@gmail.com> 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;
+}