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21#define FOR_pwd
22#include "toys.h"
23
24void pwd_main(void)
25{
26 char *s, *pwd = getcwd(0, 0), *PWD;
27
28
29 if (!FLAG(P) && (s = PWD = getenv("PWD"))) {
30 struct stat st1, st2;
31
32 while (*s == '/') {
33 if (*(++s) == '.') {
34 if (s[1] == '/' || !s[1]) break;
35 if (s[1] == '.' && (s[2] == '/' || !s[2])) break;
36 }
37 while (*s && *s != '/') s++;
38 }
39 if (!*s && s != PWD) s = PWD;
40 else s = 0;
41
42
43 if (s && pwd)
44 if (stat(pwd, &st1) || stat(PWD, &st2) || st1.st_ino != st2.st_ino ||
45 st1.st_dev != st2.st_dev) s = 0;
46 } else s = 0;
47
48
49 if (s || (s = pwd)) puts(s);
50 free(pwd);
51 if (!s) perror_exit("xgetcwd");
52}
53