/* dir.cc: Posix directory-related routines Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002 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" 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; } /* readdir: POSIX 5.1.2.1 */ extern "C" struct dirent * readdir (DIR *dir) { myfault efault; if (efault.faulted (EFAULT)) return NULL; if (dir->__d_cookie != __DIRENT_COOKIE) { set_errno (EBADF); syscall_printf ("%p = readdir (%p)", NULL, dir); return NULL; } dirent *res = ((fhandler_base *) dir->__fh)->readdir (dir); if (!res) { if (!(dir->__flags & dirent_saw_dot)) { res = dir->__d_dirent; strcpy (res->d_name, "."); dir->__flags |= dirent_saw_dot; dir->__d_position++; } else if (!(dir->__flags & dirent_saw_dot_dot)) { res = dir->__d_dirent; strcpy (res->d_name, ".."); dir->__flags |= dirent_saw_dot_dot; dir->__d_position++; } } if (res) { /* Compute d_ino by combining filename hash with the directory hash (which was stored in dir->__d_dirhash when opendir was called). */ if (res->d_name[0] == '.') { if (res->d_name[1] == '\0') { dir->__d_dirent->d_ino = dir->__d_dirhash; dir->__flags |= dirent_saw_dot; } else if (res->d_name[1] != '.' || res->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, '\\'))) dir->__d_dirent->d_ino = hash_path_name (0, "."); else { *p = '\0'; dir->__d_dirent->d_ino = hash_path_name (0, up); } } } else { hashit: __ino64_t dino = hash_path_name (dir->__d_dirhash, "\\"); dir->__d_dirent->d_ino = hash_path_name (dino, res->d_name); } res->__ino32 = dir->__d_dirent->d_ino; // for legacy applications } 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; if (!(fh = build_fh_name (dir, NULL, PC_SYM_NOFOLLOW | PC_WRITABLE))) 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; if (!(fh = build_fh_name (dir, NULL, PC_SYM_NOFOLLOW | PC_WRITABLE))) 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; }