1*cf5a6c84SAndroid Build Coastguard Worker /* pwd.c - Print working directory.
2*cf5a6c84SAndroid Build Coastguard Worker *
3*cf5a6c84SAndroid Build Coastguard Worker * Copyright 2006 Rob Landley <[email protected]>
4*cf5a6c84SAndroid Build Coastguard Worker *
5*cf5a6c84SAndroid Build Coastguard Worker * See http://opengroup.org/onlinepubs/9699919799/utilities/pwd.html
6*cf5a6c84SAndroid Build Coastguard Worker
7*cf5a6c84SAndroid Build Coastguard Worker USE_PWD(NEWTOY(pwd, ">0LP[-LP]", TOYFLAG_BIN|TOYFLAG_MAYFORK))
8*cf5a6c84SAndroid Build Coastguard Worker
9*cf5a6c84SAndroid Build Coastguard Worker config PWD
10*cf5a6c84SAndroid Build Coastguard Worker bool "pwd"
11*cf5a6c84SAndroid Build Coastguard Worker default y
12*cf5a6c84SAndroid Build Coastguard Worker help
13*cf5a6c84SAndroid Build Coastguard Worker usage: pwd [-L|-P]
14*cf5a6c84SAndroid Build Coastguard Worker
15*cf5a6c84SAndroid Build Coastguard Worker Print working (current) directory.
16*cf5a6c84SAndroid Build Coastguard Worker
17*cf5a6c84SAndroid Build Coastguard Worker -L Use shell's path from $PWD (when applicable)
18*cf5a6c84SAndroid Build Coastguard Worker -P Print canonical absolute path
19*cf5a6c84SAndroid Build Coastguard Worker */
20*cf5a6c84SAndroid Build Coastguard Worker
21*cf5a6c84SAndroid Build Coastguard Worker #define FOR_pwd
22*cf5a6c84SAndroid Build Coastguard Worker #include "toys.h"
23*cf5a6c84SAndroid Build Coastguard Worker
pwd_main(void)24*cf5a6c84SAndroid Build Coastguard Worker void pwd_main(void)
25*cf5a6c84SAndroid Build Coastguard Worker {
26*cf5a6c84SAndroid Build Coastguard Worker char *s, *pwd = getcwd(0, 0), *PWD;
27*cf5a6c84SAndroid Build Coastguard Worker
28*cf5a6c84SAndroid Build Coastguard Worker // Only use $PWD if it's an absolute path alias for cwd with no "." or ".."
29*cf5a6c84SAndroid Build Coastguard Worker if (!FLAG(P) && (s = PWD = getenv("PWD"))) {
30*cf5a6c84SAndroid Build Coastguard Worker struct stat st1, st2;
31*cf5a6c84SAndroid Build Coastguard Worker
32*cf5a6c84SAndroid Build Coastguard Worker while (*s == '/') {
33*cf5a6c84SAndroid Build Coastguard Worker if (*(++s) == '.') {
34*cf5a6c84SAndroid Build Coastguard Worker if (s[1] == '/' || !s[1]) break;
35*cf5a6c84SAndroid Build Coastguard Worker if (s[1] == '.' && (s[2] == '/' || !s[2])) break;
36*cf5a6c84SAndroid Build Coastguard Worker }
37*cf5a6c84SAndroid Build Coastguard Worker while (*s && *s != '/') s++;
38*cf5a6c84SAndroid Build Coastguard Worker }
39*cf5a6c84SAndroid Build Coastguard Worker if (!*s && s != PWD) s = PWD;
40*cf5a6c84SAndroid Build Coastguard Worker else s = 0;
41*cf5a6c84SAndroid Build Coastguard Worker
42*cf5a6c84SAndroid Build Coastguard Worker // If current directory exists, make sure it matches.
43*cf5a6c84SAndroid Build Coastguard Worker if (s && pwd)
44*cf5a6c84SAndroid Build Coastguard Worker if (stat(pwd, &st1) || stat(PWD, &st2) || !same_file(&st1, &st2)) s = 0;
45*cf5a6c84SAndroid Build Coastguard Worker } else s = 0;
46*cf5a6c84SAndroid Build Coastguard Worker
47*cf5a6c84SAndroid Build Coastguard Worker // If -L didn't give us a valid path, use cwd.
48*cf5a6c84SAndroid Build Coastguard Worker if (s || (s = pwd)) puts(s);
49*cf5a6c84SAndroid Build Coastguard Worker free(pwd);
50*cf5a6c84SAndroid Build Coastguard Worker if (!s) perror_exit("xgetcwd");
51*cf5a6c84SAndroid Build Coastguard Worker }
52