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- /* pwd.c - Print working directory.
- *
- * Copyright 2006 Rob Landley <rob@landley.net>
- *
- * See http://opengroup.org/onlinepubs/9699919799/utilities/pwd.html
- USE_PWD(NEWTOY(pwd, ">0LP[-LP]", TOYFLAG_BIN|TOYFLAG_MAYFORK))
- config PWD
- bool "pwd"
- default y
- help
- usage: pwd [-L|-P]
- Print working (current) directory.
- -L Use shell's path from $PWD (when applicable)
- -P Print canonical absolute path
- */
- #define FOR_pwd
- #include "toys.h"
- void pwd_main(void)
- {
- char *s, *pwd = getcwd(0, 0), *PWD;
- // Only use $PWD if it's an absolute path alias for cwd with no "." or ".."
- if (!FLAG(P) && (s = PWD = getenv("PWD"))) {
- struct stat st1, st2;
- while (*s == '/') {
- if (*(++s) == '.') {
- if (s[1] == '/' || !s[1]) break;
- if (s[1] == '.' && (s[2] == '/' || !s[2])) break;
- }
- while (*s && *s != '/') s++;
- }
- if (!*s && s != PWD) s = PWD;
- else s = 0;
- // If current directory exists, make sure it matches.
- if (s && pwd)
- if (stat(pwd, &st1) || stat(PWD, &st2) || st1.st_ino != st2.st_ino ||
- st1.st_dev != st2.st_dev) s = 0;
- } else s = 0;
- // If -L didn't give us a valid path, use cwd.
- if (s || (s = pwd)) puts(s);
- free(pwd);
- if (!s) perror_exit("xgetcwd");
- }
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