/* vi: set sw=4 ts=4: */ /* * bb_simplify_path implementation for busybox * * Copyright (C) 2001 Manuel Novoa III <mjn3@codepoet.org> * * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ #include "libbb.h" char* FAST_FUNC bb_simplify_abs_path_inplace(char *start) { char *s, *p; p = s = start; do { if (*p == '/') { if (*s == '/') { /* skip duplicate (or initial) slash */ continue; } if (*s == '.') { if (s[1] == '/' || !s[1]) { /* remove extra '.' */ continue; } if ((s[1] == '.') && (s[2] == '/' || !s[2])) { ++s; if (p > start) { while (*--p != '/') /* omit previous dir */ continue; } continue; } } } *++p = *s; } while (*++s); if ((p == start) || (*p != '/')) { /* not a trailing slash */ ++p; /* so keep last character */ } *p = '\0'; return p; } char* FAST_FUNC bb_simplify_path(const char *path) { char *s, *p; if (path[0] == '/') s = xstrdup(path); else { p = xrealloc_getcwd_or_warn(NULL); s = concat_path_file(p, path); free(p); } bb_simplify_abs_path_inplace(s); return s; }