10f66f451Sopenharmony_ci/* pwd.c - Print working directory. 20f66f451Sopenharmony_ci * 30f66f451Sopenharmony_ci * Copyright 2006 Rob Landley <rob@landley.net> 40f66f451Sopenharmony_ci * 50f66f451Sopenharmony_ci * See http://opengroup.org/onlinepubs/9699919799/utilities/pwd.html 60f66f451Sopenharmony_ci 70f66f451Sopenharmony_ciUSE_PWD(NEWTOY(pwd, ">0LP[-LP]", TOYFLAG_BIN|TOYFLAG_MAYFORK)) 80f66f451Sopenharmony_ci 90f66f451Sopenharmony_ciconfig PWD 100f66f451Sopenharmony_ci bool "pwd" 110f66f451Sopenharmony_ci default y 120f66f451Sopenharmony_ci help 130f66f451Sopenharmony_ci usage: pwd [-L|-P] 140f66f451Sopenharmony_ci 150f66f451Sopenharmony_ci Print working (current) directory. 160f66f451Sopenharmony_ci 170f66f451Sopenharmony_ci -L Use shell's path from $PWD (when applicable) 180f66f451Sopenharmony_ci -P Print canonical absolute path 190f66f451Sopenharmony_ci*/ 200f66f451Sopenharmony_ci 210f66f451Sopenharmony_ci#define FOR_pwd 220f66f451Sopenharmony_ci#include "toys.h" 230f66f451Sopenharmony_ci 240f66f451Sopenharmony_civoid pwd_main(void) 250f66f451Sopenharmony_ci{ 260f66f451Sopenharmony_ci char *s, *pwd = getcwd(0, 0), *PWD; 270f66f451Sopenharmony_ci 280f66f451Sopenharmony_ci // Only use $PWD if it's an absolute path alias for cwd with no "." or ".." 290f66f451Sopenharmony_ci if (!FLAG(P) && (s = PWD = getenv("PWD"))) { 300f66f451Sopenharmony_ci struct stat st1, st2; 310f66f451Sopenharmony_ci 320f66f451Sopenharmony_ci while (*s == '/') { 330f66f451Sopenharmony_ci if (*(++s) == '.') { 340f66f451Sopenharmony_ci if (s[1] == '/' || !s[1]) break; 350f66f451Sopenharmony_ci if (s[1] == '.' && (s[2] == '/' || !s[2])) break; 360f66f451Sopenharmony_ci } 370f66f451Sopenharmony_ci while (*s && *s != '/') s++; 380f66f451Sopenharmony_ci } 390f66f451Sopenharmony_ci if (!*s && s != PWD) s = PWD; 400f66f451Sopenharmony_ci else s = 0; 410f66f451Sopenharmony_ci 420f66f451Sopenharmony_ci // If current directory exists, make sure it matches. 430f66f451Sopenharmony_ci if (s && pwd) 440f66f451Sopenharmony_ci if (stat(pwd, &st1) || stat(PWD, &st2) || st1.st_ino != st2.st_ino || 450f66f451Sopenharmony_ci st1.st_dev != st2.st_dev) s = 0; 460f66f451Sopenharmony_ci } else s = 0; 470f66f451Sopenharmony_ci 480f66f451Sopenharmony_ci // If -L didn't give us a valid path, use cwd. 490f66f451Sopenharmony_ci if (s || (s = pwd)) puts(s); 500f66f451Sopenharmony_ci free(pwd); 510f66f451Sopenharmony_ci if (!s) perror_exit("xgetcwd"); 520f66f451Sopenharmony_ci} 53