*
* Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
+//config:config PWD
+//config: bool "pwd"
+//config: default y
+//config: help
+//config: pwd is used to print the current directory.
-#include <stdio.h>
-#include <stdlib.h>
-#include "busybox.h"
+//applet:IF_PWD(APPLET_NOFORK(pwd, pwd, BB_DIR_BIN, BB_SUID_DROP, pwd))
-int pwd_main(int argc, char **argv);
-int pwd_main(int argc, char **argv)
+//kbuild:lib-$(CONFIG_PWD) += pwd.o
+
+//usage:#define pwd_trivial_usage
+//usage: ""
+//usage:#define pwd_full_usage "\n\n"
+//usage: "Print the full filename of the current working directory"
+//usage:
+//usage:#define pwd_example_usage
+//usage: "$ pwd\n"
+//usage: "/root\n"
+
+#include "libbb.h"
+
+static int logical_getcwd(void)
+{
+ struct stat st1;
+ struct stat st2;
+ char *wd;
+ char *p;
+
+ wd = getenv("PWD");
+ if (!wd || wd[0] != '/')
+ return 0;
+
+ p = wd;
+ while (*p) {
+ /* doing strstr(p, "/.") by hand is smaller and faster... */
+ if (*p++ != '/')
+ continue;
+ if (*p != '.')
+ continue;
+ /* we found "/.", skip to next char */
+ p++;
+ if (*p == '.')
+ p++; /* we found "/.." */
+ if (*p == '\0' || *p == '/')
+ return 0; /* "/./" or "/../" component: bad */
+ }
+
+ if (stat(wd, &st1) != 0)
+ return 0;
+ if (stat(".", &st2) != 0)
+ return 0;
+ if (st1.st_ino != st2.st_ino)
+ return 0;
+ if (st1.st_dev != st2.st_dev)
+ return 0;
+
+ puts(wd);
+ return 1;
+}
+
+int pwd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int pwd_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
char *buf;
+ if (ENABLE_DESKTOP) {
+ /* TODO: assume -L if $POSIXLY_CORRECT? (coreutils does that)
+ * Rationale:
+ * POSIX requires a default of -L, but most scripts expect -P
+ */
+ unsigned opt = getopt32(argv, "LP");
+ if ((opt & 1) && logical_getcwd())
+ return fflush_all();
+ }
+
buf = xrealloc_getcwd_or_warn(NULL);
- if (buf != NULL) {
+
+ if (buf) {
puts(buf);
- fflush_stdout_and_exit(EXIT_SUCCESS);
+ free(buf);
+ return fflush_all();
}
return EXIT_FAILURE;