1 /* vi: set sw=4 ts=4: */
3 * Mini pwd implementation for busybox
5 * Copyright (C) 1995, 1996 by Bruce Perens <bruce@pixar.com>.
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
10 //usage:#define pwd_trivial_usage
12 //usage:#define pwd_full_usage "\n\n"
13 //usage: "Print the full filename of the current working directory"
15 //usage:#define pwd_example_usage
21 /* This is a NOFORK applet. Be very careful! */
23 static int logical_getcwd(void)
31 if (!wd || wd[0] != '/')
36 /* doing strstr(p, "/.") by hand is smaller and faster... */
41 /* we found "/.", skip to next char */
44 p++; /* we found "/.." */
45 if (*p == '\0' || *p == '/')
46 return 0; /* "/./" or "/../" component: bad */
49 if (stat(wd, &st1) != 0)
51 if (stat(".", &st2) != 0)
53 if (st1.st_ino != st2.st_ino)
55 if (st1.st_dev != st2.st_dev)
62 int pwd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
63 int pwd_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
68 /* TODO: assume -L if $POSIXLY_CORRECT? (coreutils does that)
70 * POSIX requires a default of -L, but most scripts expect -P
72 unsigned opt = getopt32(argv, "LP");
73 if ((opt & 1) && logical_getcwd())
77 buf = xrealloc_getcwd_or_warn(NULL);