/* dir.cc: Posix directory-related routines Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2006 Red Hat, Inc. This file is part of Cygwin. This software is a copyrighted work licensed under the terms of the Cygwin license. Please consult the file "CYGWIN_LICENSE" for details. */ #include "winsup.h" #include #include #include #define _COMPILING_NEWLIB #include #include "pinfo.h" #include "cygerrno.h" #include "security.h" #include "path.h" #include "fhandler.h" #include "dtable.h" #include "cygheap.h" #include "cygtls.h" #include "perprocess.h" #include "cygwin/version.h" extern "C" int dirfd (DIR *dir) { myfault efault; if (efault.faulted (EFAULT)) return -1; if (dir->__d_cookie != __DIRENT_COOKIE) { set_errno (EBADF); syscall_printf ("-1 = dirfd (%p)", dir); return -1; } return dir->__d_dirent->d_fd; } /* opendir: POSIX 5.1.2.1 */ extern "C" DIR * opendir (const char *name) { fhandler_base *fh; DIR *res; fh = build_fh_name (name, NULL, PC_SYM_FOLLOW); if (!fh) res = NULL; else if (fh->exists ()) res = fh->opendir (); else { set_errno (ENOENT); res = NULL; } if (res) /* nothing */; else if (fh) delete fh; return res; } static int readdir_worker (DIR *dir, dirent *de) { myfault efault; if (efault.faulted ()) return EFAULT; if (dir->__d_cookie != __DIRENT_COOKIE) { syscall_printf ("%p = readdir (%p)", NULL, dir); return EBADF; } int res = ((fhandler_base *) dir->__fh)->readdir (dir, de); if (res == ENMFILE) { if (!(dir->__flags & dirent_saw_dot)) { strcpy (de->d_name, "."); dir->__flags |= dirent_saw_dot; dir->__d_position++; res = 0; } else if (!(dir->__flags & dirent_saw_dot_dot)) { strcpy (de->d_name, ".."); dir->__flags |= dirent_saw_dot_dot; dir->__d_position++; res = 0; } } if (res) /* error return */; else if (!CYGWIN_VERSION_CHECK_FOR_NEEDS_D_INO) { de->__invalid_d_ino = (ino_t) -1; de->__invalid_ino32 = (uint32_t) -1; if (de->d_name[0] == '.') { if (de->d_name[1] == '\0') dir->__flags |= dirent_saw_dot; else if (de->d_name[1] == '.' && de->d_name[2] == '\0') dir->__flags |= dirent_saw_dot_dot; } } else { /* Compute d_ino by combining filename hash with the directory hash (which was stored in dir->__d_dirhash when opendir was called). */ if (de->d_name[0] == '.') { if (de->d_name[1] == '\0') { de->__invalid_d_ino = dir->__d_dirhash; dir->__flags |= dirent_saw_dot; } else if (de->d_name[1] != '.' || de->d_name[2] != '\0') goto hashit; else { dir->__flags |= dirent_saw_dot_dot; char *p, up[strlen (dir->__d_dirname) + 1]; strcpy (up, dir->__d_dirname); if (!(p = strrchr (up, '\\'))) goto hashit; *p = '\0'; if (!(p = strrchr (up, '\\'))) de->__invalid_d_ino = hash_path_name (0, "."); else { *p = '\0'; de->__invalid_d_ino = hash_path_name (0, up); } } } else { hashit: __ino64_t dino = hash_path_name (dir->__d_dirhash, "\\"); de->__invalid_d_ino = hash_path_name (dino, de->d_name); } de->__invalid_ino32 = de->__invalid_d_ino; // for legacy applications } return res; } /* readdir: POSIX 5.1.2.1 */ extern "C" struct dirent * readdir (DIR *dir) { int res = readdir_worker (dir, dir->__d_dirent); if (res == 0) return dir->__d_dirent; if (res != ENMFILE) set_errno (res); return NULL; } extern "C" int readdir_r (DIR *dir, dirent *de, dirent **ode) { int res = readdir_worker (dir, de); if (!res) *ode = de; else { *ode = NULL; if (res == ENMFILE) res = 0; } return res; } extern "C" _off64_t telldir64 (DIR *dir) { myfault efault; if (efault.faulted (EFAULT)) return -1; if (dir->__d_cookie != __DIRENT_COOKIE) return 0; return ((fhandler_base *) dir->__fh)->telldir (dir); } /* telldir */ extern "C" _off_t telldir (DIR *dir) { return telldir64 (dir); } extern "C" void seekdir64 (DIR *dir, _off64_t loc) { myfault efault; if (efault.faulted (EFAULT)) return; if (dir->__d_cookie != __DIRENT_COOKIE) return; dir->__flags &= dirent_isroot; return ((fhandler_base *) dir->__fh)->seekdir (dir, loc); } /* seekdir */ extern "C" void seekdir (DIR *dir, _off_t loc) { seekdir64 (dir, (_off64_t)loc); } /* rewinddir: POSIX 5.1.2.1 */ extern "C" void rewinddir (DIR *dir) { myfault efault; if (efault.faulted (EFAULT)) return; if (dir->__d_cookie != __DIRENT_COOKIE) return; dir->__flags &= dirent_isroot; return ((fhandler_base *) dir->__fh)->rewinddir (dir); } /* closedir: POSIX 5.1.2.1 */ extern "C" int closedir (DIR *dir) { myfault efault; if (efault.faulted (EFAULT)) return -1; if (dir->__d_cookie != __DIRENT_COOKIE) { set_errno (EBADF); syscall_printf ("-1 = closedir (%p)", dir); return -1; } /* Reset the marker in case the caller tries to use `dir' again. */ dir->__d_cookie = 0; int res = ((fhandler_base *) dir->__fh)->closedir (dir); cygheap->fdtab.release (dir->__d_dirent->d_fd); free (dir->__d_dirname); free (dir->__d_dirent); free (dir); syscall_printf ("%d = closedir (%p)", res); return res; } /* mkdir: POSIX 5.4.1.1 */ extern "C" int mkdir (const char *dir, mode_t mode) { int res = -1; fhandler_base *fh = NULL; myfault efault; if (efault.faulted (EFAULT)) return -1; if (has_dot_last_component (dir)) { set_errno (ENOENT); return -1; } if (!(fh = build_fh_name (dir, NULL, PC_SYM_NOFOLLOW))) goto done; /* errno already set */; if (fh->error ()) { debug_printf ("got %d error from build_fh_name", fh->error ()); set_errno (fh->error ()); } else if (!fh->mkdir (mode)) res = 0; delete fh; done: syscall_printf ("%d = mkdir (%s, %d)", res, dir, mode); return res; } /* rmdir: POSIX 5.5.2.1 */ extern "C" int rmdir (const char *dir) { int res = -1; fhandler_base *fh = NULL; myfault efault; if (efault.faulted (EFAULT)) return -1; if (has_dot_last_component (dir)) { set_errno (EINVAL); return -1; } if (!(fh = build_fh_name (dir, NULL, PC_SYM_NOFOLLOW))) goto done; /* errno already set */; if (fh->error ()) { debug_printf ("got %d error from build_fh_name", fh->error ()); set_errno (fh->error ()); } else if (!fh->rmdir ()) res = 0; delete fh; done: syscall_printf ("%d = rmdir (%s)", res, dir); return res; }