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/* Copyright (C) 1996,1997,1998,1999,2000,2001, 2002, 2004, 2006 Free Software Foundation, Inc.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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/* See stime.c for comments on why _POSIX_C_SOURCE is not always defined. */
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#define _GNU_SOURCE /* ask glibc for everything */
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#define _LARGEFILE64_SOURCE /* ask for stat64 etc */
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#define _POSIX_C_SOURCE 199506L /* for readdir_r */
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/* This blob per the Autoconf manual (under "Particular Functions"). */
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#elif defined __GNUC__
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# define alloca __builtin_alloca
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# define alloca __alloca
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#elif defined _MSC_VER
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# define alloca _alloca
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void *alloca (size_t);
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#include "libguile/_scm.h"
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#include "libguile/smob.h"
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#include "libguile/feature.h"
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#include "libguile/fports.h"
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#include "libguile/private-gc.h" /* for SCM_MAX */
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#include "libguile/iselect.h"
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#include "libguile/strings.h"
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#include "libguile/vectors.h"
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#include "libguile/lang.h"
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#include "libguile/dynwind.h"
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#include "libguile/validate.h"
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#include "libguile/filesys.h"
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#ifdef TIME_WITH_SYS_TIME
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# include <sys/time.h>
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# include <sys/time.h>
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#ifdef LIBC_H_WITH_UNISTD_H
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#if defined (__MINGW32__) || defined (_MSC_VER) || defined (__BORLANDC__)
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# include "win32-dirent.h"
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# define NAMLEN(dirent) strlen((dirent)->d_name)
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/* The following bits are per AC_HEADER_DIRENT doco in the autoconf manual */
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# define NAMLEN(dirent) strlen((dirent)->d_name)
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# define dirent direct
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# define NAMLEN(dirent) (dirent)->d_namlen
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# include <sys/ndir.h>
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# include <sys/dir.h>
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/* Ultrix has S_IFSOCK, but no S_ISSOCK. Ipe! */
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#if defined (S_IFSOCK) && ! defined (S_ISSOCK)
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#define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
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/* The MinGW gcc does not define the S_ISSOCK macro. Any other native Windows
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compiler like BorlandC or MSVC has none of these macros defined. */
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# define _S_IFIFO 0x1000 /* FIFO */
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# define _S_IFCHR 0x2000 /* Character */
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# define _S_IFBLK 0x3000 /* Block */
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# define _S_IFDIR 0x4000 /* Directory */
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# define _S_IFREG 0x8000 /* Regular */
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# define _S_IFSOCK 0xC000 /* Socket */
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# define S_ISBLK(mode) (((mode) & _S_IFMT) == _S_IFBLK)
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# define S_ISFIFO(mode) (((mode) & _S_IFMT) == _S_IFIFO)
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# define S_ISCHR(mode) (((mode) & _S_IFMT) == _S_IFCHR)
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# define S_ISDIR(mode) (((mode) & _S_IFMT) == _S_IFDIR)
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# define S_ISREG(mode) (((mode) & _S_IFMT) == _S_IFREG)
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# define S_ISSOCK(mode) (((mode) & _S_IFMT) == _S_IFSOCK)
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#endif /* __MINGW32__ */
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/* Some more definitions for the native Windows port. */
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# define mkdir(path, mode) mkdir (path)
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# define fsync(fd) _commit (fd)
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# define fchmod(fd, mode) (-1)
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#endif /* __MINGW32__ */
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/* dirfd() returns the file descriptor underlying a "DIR*" directory stream.
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Found on MacOS X for instance. The following definition is for Solaris
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10, it's probably not right elsewhere, but that's ok, it shouldn't be
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used elsewhere. Crib note: If we need more then gnulib has a dirfd.m4
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figuring out how to get the fd (dirfd function, dirfd macro, dd_fd field,
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#define dirfd(dirstream) ((dirstream)->dd_fd)
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/* Two helper macros for an often used pattern */
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#define STRING_SYSCALL(str,cstr,code) \
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char *cstr = scm_to_locale_string (str); \
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SCM_SYSCALL (code); \
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eno = errno; free (cstr); errno = eno; \
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#define STRING2_SYSCALL(str1,cstr1,str2,cstr2,code) \
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char *cstr1, *cstr2; \
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scm_dynwind_begin (0); \
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cstr1 = scm_to_locale_string (str1); \
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scm_dynwind_free (cstr1); \
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cstr2 = scm_to_locale_string (str2); \
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scm_dynwind_free (cstr2); \
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SCM_SYSCALL (code); \
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eno = errno; scm_dynwind_end (); errno = eno; \
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SCM_DEFINE (scm_chown, "chown", 3, 0, 0,
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(SCM object, SCM owner, SCM group),
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"Change the ownership and group of the file referred to by @var{object} to\n"
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"the integer values @var{owner} and @var{group}. @var{object} can be\n"
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"a string containing a file name or, if the platform\n"
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"supports fchown, a port or integer file descriptor\n"
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"which is open on the file. The return value\n"
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"is unspecified.\n\n"
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"If @var{object} is a symbolic link, either the\n"
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"ownership of the link or the ownership of the referenced file will be\n"
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"changed depending on the operating system (lchown is\n"
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"unsupported at present). If @var{owner} or @var{group} is specified\n"
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"as @code{-1}, then that ID is not changed.")
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#define FUNC_NAME s_scm_chown
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object = SCM_COERCE_OUTPORT (object);
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if (scm_is_integer (object) || (SCM_OPFPORTP (object)))
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int fdes = (SCM_OPFPORTP (object)?
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SCM_FPORT_FDES (object) : scm_to_int (object));
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SCM_SYSCALL (rv = fchown (fdes, scm_to_int (owner), scm_to_int (group)));
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STRING_SYSCALL (object, c_object,
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rv = chown (c_object,
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scm_to_int (owner), scm_to_int (group)));
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return SCM_UNSPECIFIED;
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#endif /* HAVE_CHOWN */
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SCM_DEFINE (scm_chmod, "chmod", 2, 0, 0,
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(SCM object, SCM mode),
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"Changes the permissions of the file referred to by @var{obj}.\n"
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"@var{obj} can be a string containing a file name or a port or integer file\n"
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"descriptor which is open on a file (in which case @code{fchmod} is used\n"
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"as the underlying system call).\n"
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"@var{mode} specifies\n"
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"the new permissions as a decimal number, e.g., @code{(chmod \"foo\" #o755)}.\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_chmod
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object = SCM_COERCE_OUTPORT (object);
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if (scm_is_integer (object) || SCM_OPFPORTP (object))
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if (scm_is_integer (object))
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fdes = scm_to_int (object);
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fdes = SCM_FPORT_FDES (object);
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SCM_SYSCALL (rv = fchmod (fdes, scm_to_int (mode)));
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STRING_SYSCALL (object, c_object,
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rv = chmod (c_object, scm_to_int (mode)));
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return SCM_UNSPECIFIED;
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SCM_DEFINE (scm_umask, "umask", 0, 1, 0,
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"If @var{mode} is omitted, returns a decimal number representing the current\n"
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"file creation mask. Otherwise the file creation mask is set to\n"
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"@var{mode} and the previous value is returned.\n\n"
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"E.g., @code{(umask #o022)} sets the mask to octal 22, decimal 18.")
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#define FUNC_NAME s_scm_umask
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if (SCM_UNBNDP (mode))
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mask = umask (scm_to_uint (mode));
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return scm_from_uint (mask);
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SCM_DEFINE (scm_open_fdes, "open-fdes", 2, 1, 0,
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(SCM path, SCM flags, SCM mode),
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"Similar to @code{open} but return a file descriptor instead of\n"
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#define FUNC_NAME s_scm_open_fdes
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iflags = SCM_NUM2INT (2, flags);
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imode = SCM_NUM2INT_DEF (3, mode, 0666);
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STRING_SYSCALL (path, c_path, fd = open_or_open64 (c_path, iflags, imode));
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return scm_from_int (fd);
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SCM_DEFINE (scm_open, "open", 2, 1, 0,
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(SCM path, SCM flags, SCM mode),
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"Open the file named by @var{path} for reading and/or writing.\n"
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"@var{flags} is an integer specifying how the file should be opened.\n"
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"@var{mode} is an integer specifying the permission bits of the file, if\n"
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"it needs to be created, before the umask is applied. The default is 666\n"
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"(Unix itself has no default).\n\n"
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"@var{flags} can be constructed by combining variables using @code{logior}.\n"
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"Basic flags are:\n\n"
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"Open the file read-only.\n"
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"Open the file write-only.\n"
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"Open the file read/write.\n"
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"Append to the file instead of truncating.\n"
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"Create the file if it does not already exist.\n"
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"See the Unix documentation of the @code{open} system call\n"
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"for additional flags.")
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#define FUNC_NAME s_scm_open
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fd = scm_to_int (scm_open_fdes (path, flags, mode));
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iflags = SCM_NUM2INT (2, flags);
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if (iflags & O_APPEND)
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else if (iflags & O_CREAT)
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if (iflags & O_APPEND)
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else if (iflags & O_WRONLY)
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newpt = scm_fdes_to_port (fd, port_mode, path);
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SCM_DEFINE (scm_close, "close", 1, 0, 0,
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"Similar to close-port (@pxref{Closing, close-port}),\n"
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"but also works on file descriptors. A side\n"
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"effect of closing a file descriptor is that any ports using that file\n"
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"descriptor are moved to a different file descriptor and have\n"
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"their revealed counts set to zero.")
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#define FUNC_NAME s_scm_close
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fd_or_port = SCM_COERCE_OUTPORT (fd_or_port);
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if (SCM_PORTP (fd_or_port))
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return scm_close_port (fd_or_port);
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fd = scm_to_int (fd_or_port);
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scm_evict_ports (fd); /* see scsh manual. */
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SCM_SYSCALL (rv = close (fd));
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/* following scsh, closing an already closed file descriptor is
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if (rv < 0 && errno != EBADF)
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return scm_from_bool (rv >= 0);
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SCM_DEFINE (scm_close_fdes, "close-fdes", 1, 0, 0,
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"A simple wrapper for the @code{close} system call.\n"
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"Close file descriptor @var{fd}, which must be an integer.\n"
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"Unlike close (@pxref{Ports and File Descriptors, close}),\n"
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"the file descriptor will be closed even if a port is using it.\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_close_fdes
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c_fd = scm_to_int (fd);
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SCM_SYSCALL (rv = close (c_fd));
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return SCM_UNSPECIFIED;
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SCM_SYMBOL (scm_sym_regular, "regular");
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SCM_SYMBOL (scm_sym_directory, "directory");
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SCM_SYMBOL (scm_sym_symlink, "symlink");
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SCM_SYMBOL (scm_sym_block_special, "block-special");
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SCM_SYMBOL (scm_sym_char_special, "char-special");
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SCM_SYMBOL (scm_sym_fifo, "fifo");
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SCM_SYMBOL (scm_sym_sock, "socket");
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SCM_SYMBOL (scm_sym_unknown, "unknown");
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scm_stat2scm (struct stat_or_stat64 *stat_temp)
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SCM ans = scm_c_make_vector (15, SCM_UNSPECIFIED);
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SCM_SIMPLE_VECTOR_SET(ans, 0, scm_from_ulong (stat_temp->st_dev));
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SCM_SIMPLE_VECTOR_SET(ans, 1, scm_from_ino_t_or_ino64_t (stat_temp->st_ino));
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SCM_SIMPLE_VECTOR_SET(ans, 2, scm_from_ulong (stat_temp->st_mode));
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SCM_SIMPLE_VECTOR_SET(ans, 3, scm_from_ulong (stat_temp->st_nlink));
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SCM_SIMPLE_VECTOR_SET(ans, 4, scm_from_ulong (stat_temp->st_uid));
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SCM_SIMPLE_VECTOR_SET(ans, 5, scm_from_ulong (stat_temp->st_gid));
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#ifdef HAVE_STRUCT_STAT_ST_RDEV
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SCM_SIMPLE_VECTOR_SET(ans, 6, scm_from_ulong (stat_temp->st_rdev));
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SCM_SIMPLE_VECTOR_SET(ans, 6, SCM_BOOL_F);
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SCM_SIMPLE_VECTOR_SET(ans, 7, scm_from_off_t_or_off64_t (stat_temp->st_size));
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SCM_SIMPLE_VECTOR_SET(ans, 8, scm_from_ulong (stat_temp->st_atime));
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SCM_SIMPLE_VECTOR_SET(ans, 9, scm_from_ulong (stat_temp->st_mtime));
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SCM_SIMPLE_VECTOR_SET(ans, 10, scm_from_ulong (stat_temp->st_ctime));
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#ifdef HAVE_STRUCT_STAT_ST_BLKSIZE
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SCM_SIMPLE_VECTOR_SET(ans, 11, scm_from_ulong (stat_temp->st_blksize));
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SCM_SIMPLE_VECTOR_SET(ans, 11, scm_from_ulong (4096L));
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#ifdef HAVE_STRUCT_STAT_ST_BLOCKS
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SCM_SIMPLE_VECTOR_SET(ans, 12, scm_from_blkcnt_t_or_blkcnt64_t (stat_temp->st_blocks));
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SCM_SIMPLE_VECTOR_SET(ans, 12, SCM_BOOL_F);
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int mode = stat_temp->st_mode;
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SCM_SIMPLE_VECTOR_SET(ans, 13, scm_sym_regular);
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else if (S_ISDIR (mode))
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SCM_SIMPLE_VECTOR_SET(ans, 13, scm_sym_directory);
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/* systems without symlinks probably don't have S_ISLNK */
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else if (S_ISLNK (mode))
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SCM_SIMPLE_VECTOR_SET(ans, 13, scm_sym_symlink);
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else if (S_ISBLK (mode))
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SCM_SIMPLE_VECTOR_SET(ans, 13, scm_sym_block_special);
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else if (S_ISCHR (mode))
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SCM_SIMPLE_VECTOR_SET(ans, 13, scm_sym_char_special);
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else if (S_ISFIFO (mode))
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SCM_SIMPLE_VECTOR_SET(ans, 13, scm_sym_fifo);
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else if (S_ISSOCK (mode))
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SCM_SIMPLE_VECTOR_SET(ans, 13, scm_sym_sock);
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SCM_SIMPLE_VECTOR_SET(ans, 13, scm_sym_unknown);
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SCM_SIMPLE_VECTOR_SET(ans, 14, scm_from_int ((~S_IFMT) & mode));
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/* the layout of the bits in ve[14] is intended to be portable.
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If there are systems that don't follow the usual convention,
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the following could be used:
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if (S_ISUID & mode) tmp += 1;
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if (S_IRGRP & mode) tmp += 1;
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if (S_ISVTX & mode) tmp += 1;
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if (S_IRUSR & mode) tmp += 1;
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if (S_IWUSR & mode) tmp += 1;
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if (S_IXUSR & mode) tmp += 1;
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if (S_IWGRP & mode) tmp += 1;
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if (S_IXGRP & mode) tmp += 1;
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if (S_IROTH & mode) tmp += 1;
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if (S_IWOTH & mode) tmp += 1;
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if (S_IXOTH & mode) tmp += 1;
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SCM_SIMPLE_VECTOR_SET(ans, 14, scm_from_int (tmp));
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* Try getting the appropiate stat buffer for a given file descriptor
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* under Windows. It differentiates between file, pipe and socket
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static int fstat_Win32 (int fdes, struct stat *buf)
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int error, optlen = sizeof (int);
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memset (buf, 0, sizeof (struct stat));
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/* Is this a socket ? */
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if (getsockopt (fdes, SOL_SOCKET, SO_ERROR, (void *) &error, &optlen) >= 0)
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buf->st_mode = _S_IFSOCK | _S_IREAD | _S_IWRITE | _S_IEXEC;
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buf->st_atime = buf->st_ctime = buf->st_mtime = time (NULL);
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/* Maybe a regular file or pipe ? */
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return fstat (fdes, buf);
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#endif /* __MINGW32__ */
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SCM_DEFINE (scm_stat, "stat", 1, 0, 0,
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"Return an object containing various information about the file\n"
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"determined by @var{obj}. @var{obj} can be a string containing\n"
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"a file name or a port or integer file descriptor which is open\n"
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"on a file (in which case @code{fstat} is used as the underlying\n"
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"The object returned by @code{stat} can be passed as a single\n"
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"parameter to the following procedures, all of which return\n"
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"The device containing the file.\n"
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"The file serial number, which distinguishes this file from all\n"
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"other files on the same device.\n"
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"The mode of the file. This includes file type information and\n"
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"the file permission bits. See @code{stat:type} and\n"
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"@code{stat:perms} below.\n"
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"The number of hard links to the file.\n"
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"The user ID of the file's owner.\n"
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"The group ID of the file.\n"
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"Device ID; this entry is defined only for character or block\n"
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"The size of a regular file in bytes.\n"
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"The last access time for the file.\n"
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"The last modification time for the file.\n"
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"The last modification time for the attributes of the file.\n"
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"@item stat:blksize\n"
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"The optimal block size for reading or writing the file, in\n"
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"@item stat:blocks\n"
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"The amount of disk space that the file occupies measured in\n"
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"units of 512 byte blocks.\n"
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"In addition, the following procedures return the information\n"
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"from stat:mode in a more convenient form:\n"
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"A symbol representing the type of file. Possible values are\n"
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"regular, directory, symlink, block-special, char-special, fifo,\n"
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"socket and unknown\n"
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"An integer representing the access permission bits.\n"
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#define FUNC_NAME s_scm_stat
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struct stat_or_stat64 stat_temp;
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if (scm_is_integer (object))
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SCM_SYSCALL (rv = fstat_Win32 (scm_to_int (object), &stat_temp));
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SCM_SYSCALL (rv = fstat_or_fstat64 (scm_to_int (object), &stat_temp));
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else if (scm_is_string (object))
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char *file = scm_to_locale_string (object);
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p = file + strlen (file) - 1;
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while (p > file && (*p == '/' || *p == '\\'))
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SCM_SYSCALL (rv = stat_or_stat64 (file, &stat_temp));
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object = SCM_COERCE_OUTPORT (object);
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SCM_VALIDATE_OPFPORT (1, object);
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fdes = SCM_FPORT_FDES (object);
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SCM_SYSCALL (rv = fstat_Win32 (fdes, &stat_temp));
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SCM_SYSCALL (rv = fstat_or_fstat64 (fdes, &stat_temp));
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SCM_SYSERROR_MSG ("~A: ~S",
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scm_list_2 (scm_strerror (scm_from_int (en)),
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return scm_stat2scm (&stat_temp);
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/* {Modifying Directories}
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SCM_DEFINE (scm_link, "link", 2, 0, 0,
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(SCM oldpath, SCM newpath),
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"Creates a new name @var{newpath} in the file system for the\n"
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"file named by @var{oldpath}. If @var{oldpath} is a symbolic\n"
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"link, the link may or may not be followed depending on the\n"
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#define FUNC_NAME s_scm_link
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STRING2_SYSCALL (oldpath, c_oldpath,
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val = link (c_oldpath, c_newpath));
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return SCM_UNSPECIFIED;
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#endif /* HAVE_LINK */
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#define my_rename rename
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my_rename (const char *oldname, const char *newname)
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SCM_SYSCALL (rv = link (oldname, newname));
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SCM_SYSCALL (rv = unlink (oldname));
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/* unlink failed. remove new name */
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SCM_SYSCALL (unlink (newname));
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SCM_DEFINE (scm_rename, "rename-file", 2, 0, 0,
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(SCM oldname, SCM newname),
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"Renames the file specified by @var{oldname} to @var{newname}.\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_rename
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STRING2_SYSCALL (oldname, c_oldname,
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rv = my_rename (c_oldname, c_newname));
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return SCM_UNSPECIFIED;
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SCM_DEFINE (scm_delete_file, "delete-file", 1, 0, 0,
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"Deletes (or \"unlinks\") the file specified by @var{path}.")
775
#define FUNC_NAME s_scm_delete_file
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STRING_SYSCALL (str, c_str, ans = unlink (c_str));
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return SCM_UNSPECIFIED;
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SCM_DEFINE (scm_mkdir, "mkdir", 1, 1, 0,
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(SCM path, SCM mode),
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"Create a new directory named by @var{path}. If @var{mode} is omitted\n"
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"then the permissions of the directory file are set using the current\n"
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"umask. Otherwise they are set to the decimal value specified with\n"
791
"@var{mode}. The return value is unspecified.")
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#define FUNC_NAME s_scm_mkdir
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if (SCM_UNBNDP (mode))
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STRING_SYSCALL (path, c_path, rv = mkdir (c_path, 0777 ^ mask));
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STRING_SYSCALL (path, c_path, rv = mkdir (c_path, scm_to_uint (mode)));
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return SCM_UNSPECIFIED;
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#endif /* HAVE_MKDIR */
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SCM_DEFINE (scm_rmdir, "rmdir", 1, 0, 0,
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"Remove the existing directory named by @var{path}. The directory must\n"
818
"be empty for this to succeed. The return value is unspecified.")
819
#define FUNC_NAME s_scm_rmdir
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STRING_SYSCALL (path, c_path, val = rmdir (c_path));
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return SCM_UNSPECIFIED;
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/* {Examining Directories}
836
scm_t_bits scm_tc16_dir;
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SCM_DEFINE (scm_directory_stream_p, "directory-stream?", 1, 0, 0,
841
"Return a boolean indicating whether @var{object} is a directory\n"
842
"stream as returned by @code{opendir}.")
843
#define FUNC_NAME s_scm_directory_stream_p
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return scm_from_bool (SCM_DIRP (obj));
850
SCM_DEFINE (scm_opendir, "opendir", 1, 0, 0,
852
"Open the directory specified by @var{path} and return a directory\n"
854
#define FUNC_NAME s_scm_opendir
857
STRING_SYSCALL (dirname, c_dirname, ds = opendir (c_dirname));
860
SCM_RETURN_NEWSMOB (scm_tc16_dir | SCM_DIR_FLAG_OPEN, ds);
865
/* FIXME: The glibc manual has a portability note that readdir_r may not
866
null-terminate its return string. The circumstances outlined for this
867
are not clear, nor is it clear what should be done about it. Lets use
868
NAMLEN and worry about what else should be done if/when someone can
871
SCM_DEFINE (scm_readdir, "readdir", 1, 0, 0,
873
"Return (as a string) the next directory entry from the directory stream\n"
874
"@var{stream}. If there is no remaining entry to be read then the\n"
875
"end of file object is returned.")
876
#define FUNC_NAME s_scm_readdir
878
struct dirent_or_dirent64 *rdent;
880
SCM_VALIDATE_DIR (1, port);
881
if (!SCM_DIR_OPEN_P (port))
882
SCM_MISC_ERROR ("Directory ~S is not open.", scm_list_1 (port));
885
/* As noted in the glibc manual, on various systems (such as Solaris) the
886
d_name[] field is only 1 char and you're expected to size the dirent
887
buffer for readdir_r based on NAME_MAX. The SCM_MAX expressions below
888
effectively give either sizeof(d_name) or NAME_MAX+1, whichever is
891
On solaris 10 there's no NAME_MAX constant, it's necessary to use
892
pathconf(). We prefer NAME_MAX though, since it should be a constant
893
and will therefore save a system call. We also prefer it since dirfd()
894
is not available everywhere.
896
An alternative to dirfd() would be to open() the directory and then use
897
fdopendir(), if the latter is available. That'd let us hold the fd
898
somewhere in the smob, or just the dirent size calculated once. */
900
struct dirent_or_dirent64 de; /* just for sizeof */
901
DIR *ds = (DIR *) SCM_CELL_WORD_1 (port);
904
char buf [SCM_MAX (sizeof (de),
905
sizeof (de) - sizeof (de.d_name) + NAME_MAX + 1)];
908
long name_max = fpathconf (dirfd (ds), _PC_NAME_MAX);
911
buf = alloca (SCM_MAX (sizeof (de),
912
sizeof (de) - sizeof (de.d_name) + name_max + 1));
916
SCM_SYSCALL (readdir_r_or_readdir64_r (ds, (struct dirent_or_dirent64 *) buf, &rdent));
922
namlen = NAMLEN (rdent);
924
return (rdent ? scm_from_locale_stringn (rdent->d_name, NAMLEN (rdent))
930
scm_dynwind_begin (0);
931
scm_i_dynwind_pthread_mutex_lock (&scm_i_misc_mutex);
934
SCM_SYSCALL (rdent = readdir_or_readdir64 ((DIR *) SCM_CELL_WORD_1 (port)));
938
ret = (rdent ? scm_from_locale_stringn (rdent->d_name, NAMLEN (rdent))
949
SCM_DEFINE (scm_rewinddir, "rewinddir", 1, 0, 0,
951
"Reset the directory port @var{stream} so that the next call to\n"
952
"@code{readdir} will return the first directory entry.")
953
#define FUNC_NAME s_scm_rewinddir
955
SCM_VALIDATE_DIR (1, port);
956
if (!SCM_DIR_OPEN_P (port))
957
SCM_MISC_ERROR ("Directory ~S is not open.", scm_list_1 (port));
959
rewinddir ((DIR *) SCM_CELL_WORD_1 (port));
961
return SCM_UNSPECIFIED;
966
SCM_DEFINE (scm_closedir, "closedir", 1, 0, 0,
968
"Close the directory stream @var{stream}.\n"
969
"The return value is unspecified.")
970
#define FUNC_NAME s_scm_closedir
972
SCM_VALIDATE_DIR (1, port);
974
if (SCM_DIR_OPEN_P (port))
978
SCM_SYSCALL (sts = closedir ((DIR *) SCM_CELL_WORD_1 (port)));
982
SCM_SET_CELL_WORD_0 (port, scm_tc16_dir);
985
return SCM_UNSPECIFIED;
991
scm_dir_print (SCM exp, SCM port, scm_print_state *pstate SCM_UNUSED)
993
scm_puts ("#<", port);
994
if (!SCM_DIR_OPEN_P (exp))
995
scm_puts ("closed: ", port);
996
scm_puts ("directory stream ", port);
997
scm_uintprint (SCM_CELL_WORD_1 (exp), 16, port);
998
scm_putc ('>', port);
1004
scm_dir_free (SCM p)
1006
if (SCM_DIR_OPEN_P (p))
1007
closedir ((DIR *) SCM_CELL_WORD_1 (p));
1012
/* {Navigating Directories}
1016
SCM_DEFINE (scm_chdir, "chdir", 1, 0, 0,
1018
"Change the current working directory to @var{path}.\n"
1019
"The return value is unspecified.")
1020
#define FUNC_NAME s_scm_chdir
1024
STRING_SYSCALL (str, c_str, ans = chdir (c_str));
1027
return SCM_UNSPECIFIED;
1032
SCM_DEFINE (scm_getcwd, "getcwd", 0, 0, 0,
1034
"Return the name of the current working directory.")
1035
#define FUNC_NAME s_scm_getcwd
1042
wd = scm_malloc (size);
1043
while ((rv = getcwd (wd, size)) == 0 && errno == ERANGE)
1047
wd = scm_malloc (size);
1051
int save_errno = errno;
1056
result = scm_from_locale_stringn (wd, strlen (wd));
1061
#endif /* HAVE_GETCWD */
1067
/* check that element is a port or file descriptor. if it's a port
1068
and its buffer is ready for use, add it to the ports_ready list.
1069
otherwise add its file descriptor to *set. the type of list can be
1070
determined from pos: SCM_ARG1 for reads, SCM_ARG2 for writes,
1071
SCM_ARG3 for excepts. */
1073
set_element (SELECT_TYPE *set, SCM *ports_ready, SCM element, int pos)
1077
if (scm_is_integer (element))
1079
fd = scm_to_int (element);
1085
element = SCM_COERCE_OUTPORT (element);
1086
SCM_ASSERT (SCM_OPFPORTP (element), element, pos, "select");
1087
if (pos == SCM_ARG1)
1089
/* check whether port has buffered input. */
1090
scm_t_port *pt = SCM_PTAB_ENTRY (element);
1092
if (pt->read_pos < pt->read_end)
1095
else if (pos == SCM_ARG2)
1097
/* check whether port's output buffer has room. */
1098
scm_t_port *pt = SCM_PTAB_ENTRY (element);
1100
/* > 1 since writing the last byte in the buffer causes flush. */
1101
if (pt->write_end - pt->write_pos > 1)
1104
fd = use_buf ? -1 : SCM_FPORT_FDES (element);
1107
*ports_ready = scm_cons (element, *ports_ready);
1113
/* check list_or_vec, a list or vector of ports or file descriptors,
1114
adding each member to either the ports_ready list (if it's a port
1115
with a usable buffer) or to *set. the kind of list_or_vec can be
1116
determined from pos: SCM_ARG1 for reads, SCM_ARG2 for writes,
1117
SCM_ARG3 for excepts. */
1119
fill_select_type (SELECT_TYPE *set, SCM *ports_ready, SCM list_or_vec, int pos)
1123
if (scm_is_simple_vector (list_or_vec))
1125
int i = SCM_SIMPLE_VECTOR_LENGTH (list_or_vec);
1129
int fd = set_element (set, ports_ready,
1130
SCM_SIMPLE_VECTOR_REF (list_or_vec, i), pos);
1138
while (!SCM_NULL_OR_NIL_P (list_or_vec))
1140
int fd = set_element (set, ports_ready, SCM_CAR (list_or_vec), pos);
1144
list_or_vec = SCM_CDR (list_or_vec);
1151
/* if element (a file descriptor or port) appears in *set, cons it to
1152
list. return list. */
1154
get_element (SELECT_TYPE *set, SCM element, SCM list)
1158
if (scm_is_integer (element))
1160
fd = scm_to_int (element);
1164
fd = SCM_FPORT_FDES (SCM_COERCE_OUTPORT (element));
1166
if (FD_ISSET (fd, set))
1167
list = scm_cons (element, list);
1171
/* construct component of scm_select return value.
1172
set: pointer to set of file descriptors found by select to be ready
1173
ports_ready: ports ready due to buffering
1174
list_or_vec: original list/vector handed to scm_select.
1175
the return value is a list/vector of ready ports/file descriptors.
1176
works by finding the objects in list which correspond to members of
1177
*set and appending them to ports_ready. result is converted to a
1178
vector if list_or_vec is a vector. */
1180
retrieve_select_type (SELECT_TYPE *set, SCM ports_ready, SCM list_or_vec)
1182
SCM answer_list = ports_ready;
1184
if (scm_is_simple_vector (list_or_vec))
1186
int i = SCM_SIMPLE_VECTOR_LENGTH (list_or_vec);
1190
answer_list = get_element (set,
1191
SCM_SIMPLE_VECTOR_REF (list_or_vec, i),
1194
return scm_vector (answer_list);
1198
/* list_or_vec must be a list. */
1199
while (!SCM_NULL_OR_NIL_P (list_or_vec))
1201
answer_list = get_element (set, SCM_CAR (list_or_vec), answer_list);
1202
list_or_vec = SCM_CDR (list_or_vec);
1208
/* Static helper functions above refer to s_scm_select directly as s_select */
1209
SCM_DEFINE (scm_select, "select", 3, 2, 0,
1210
(SCM reads, SCM writes, SCM excepts, SCM secs, SCM usecs),
1211
"This procedure has a variety of uses: waiting for the ability\n"
1212
"to provide input, accept output, or the existence of\n"
1213
"exceptional conditions on a collection of ports or file\n"
1214
"descriptors, or waiting for a timeout to occur.\n"
1215
"It also returns if interrupted by a signal.\n\n"
1216
"@var{reads}, @var{writes} and @var{excepts} can be lists or\n"
1217
"vectors, with each member a port or a file descriptor.\n"
1218
"The value returned is a list of three corresponding\n"
1219
"lists or vectors containing only the members which meet the\n"
1220
"specified requirement. The ability of port buffers to\n"
1221
"provide input or accept output is taken into account.\n"
1222
"Ordering of the input lists or vectors is not preserved.\n\n"
1223
"The optional arguments @var{secs} and @var{usecs} specify the\n"
1224
"timeout. Either @var{secs} can be specified alone, as\n"
1225
"either an integer or a real number, or both @var{secs} and\n"
1226
"@var{usecs} can be specified as integers, in which case\n"
1227
"@var{usecs} is an additional timeout expressed in\n"
1228
"microseconds. If @var{secs} is omitted or is @code{#f} then\n"
1229
"select will wait for as long as it takes for one of the other\n"
1230
"conditions to be satisfied.\n\n"
1231
"The scsh version of @code{select} differs as follows:\n"
1232
"Only vectors are accepted for the first three arguments.\n"
1233
"The @var{usecs} argument is not supported.\n"
1234
"Multiple values are returned instead of a list.\n"
1235
"Duplicates in the input vectors appear only once in output.\n"
1236
"An additional @code{select!} interface is provided.")
1237
#define FUNC_NAME s_scm_select
1239
struct timeval timeout;
1240
struct timeval * time_ptr;
1241
SELECT_TYPE read_set;
1242
SELECT_TYPE write_set;
1243
SELECT_TYPE except_set;
1247
/* these lists accumulate ports which are ready due to buffering.
1248
their file descriptors don't need to be added to the select sets. */
1249
SCM read_ports_ready = SCM_EOL;
1250
SCM write_ports_ready = SCM_EOL;
1253
if (scm_is_simple_vector (reads))
1255
read_count = SCM_SIMPLE_VECTOR_LENGTH (reads);
1259
read_count = scm_ilength (reads);
1260
SCM_ASSERT (read_count >= 0, reads, SCM_ARG1, FUNC_NAME);
1262
if (scm_is_simple_vector (writes))
1264
write_count = SCM_SIMPLE_VECTOR_LENGTH (writes);
1268
write_count = scm_ilength (writes);
1269
SCM_ASSERT (write_count >= 0, writes, SCM_ARG2, FUNC_NAME);
1271
if (scm_is_simple_vector (excepts))
1273
except_count = SCM_SIMPLE_VECTOR_LENGTH (excepts);
1277
except_count = scm_ilength (excepts);
1278
SCM_ASSERT (except_count >= 0, excepts, SCM_ARG3, FUNC_NAME);
1281
FD_ZERO (&read_set);
1282
FD_ZERO (&write_set);
1283
FD_ZERO (&except_set);
1285
max_fd = fill_select_type (&read_set, &read_ports_ready, reads, SCM_ARG1);
1288
int write_max = fill_select_type (&write_set, &write_ports_ready,
1290
int except_max = fill_select_type (&except_set, NULL,
1293
if (write_max > max_fd)
1295
if (except_max > max_fd)
1296
max_fd = except_max;
1299
/* if there's a port with a ready buffer, don't block, just
1300
check for ready file descriptors. */
1301
if (!scm_is_null (read_ports_ready) || !scm_is_null (write_ports_ready))
1304
timeout.tv_usec = 0;
1305
time_ptr = &timeout;
1307
else if (SCM_UNBNDP (secs) || scm_is_false (secs))
1311
if (scm_is_unsigned_integer (secs, 0, ULONG_MAX))
1313
timeout.tv_sec = scm_to_ulong (secs);
1314
if (SCM_UNBNDP (usecs))
1315
timeout.tv_usec = 0;
1317
timeout.tv_usec = scm_to_long (usecs);
1321
double fl = scm_to_double (secs);
1323
if (!SCM_UNBNDP (usecs))
1324
SCM_WRONG_TYPE_ARG (4, secs);
1326
SCM_OUT_OF_RANGE (4, secs);
1327
timeout.tv_sec = (long) fl;
1328
timeout.tv_usec = (long) ((fl - timeout.tv_sec) * 1000000);
1330
time_ptr = &timeout;
1334
int rv = scm_std_select (max_fd + 1,
1335
&read_set, &write_set, &except_set,
1340
return scm_list_3 (retrieve_select_type (&read_set, read_ports_ready, reads),
1341
retrieve_select_type (&write_set, write_ports_ready, writes),
1342
retrieve_select_type (&except_set, SCM_EOL, excepts));
1345
#endif /* HAVE_SELECT */
1350
SCM_DEFINE (scm_fcntl, "fcntl", 2, 1, 0,
1351
(SCM object, SCM cmd, SCM value),
1352
"Apply @var{command} to the specified file descriptor or the underlying\n"
1353
"file descriptor of the specified port. @var{value} is an optional\n"
1354
"integer argument.\n\n"
1355
"Values for @var{command} are:\n\n"
1358
"Duplicate a file descriptor\n"
1360
"Get flags associated with the file descriptor.\n"
1362
"Set flags associated with the file descriptor to @var{value}.\n"
1364
"Get flags associated with the open file.\n"
1366
"Set flags associated with the open file to @var{value}\n"
1368
"Get the process ID of a socket's owner, for @code{SIGIO} signals.\n"
1370
"Set the process that owns a socket to @var{value}, for @code{SIGIO} signals.\n"
1371
"@item FD_CLOEXEC\n"
1372
"The value used to indicate the \"close on exec\" flag with @code{F_GETFL} or\n"
1375
#define FUNC_NAME s_scm_fcntl
1381
object = SCM_COERCE_OUTPORT (object);
1383
if (SCM_OPFPORTP (object))
1384
fdes = SCM_FPORT_FDES (object);
1386
fdes = scm_to_int (object);
1388
if (SCM_UNBNDP (value))
1391
ivalue = scm_to_int (value);
1393
SCM_SYSCALL (rv = fcntl (fdes, scm_to_int (cmd), ivalue));
1396
return scm_from_int (rv);
1399
#endif /* HAVE_FCNTL */
1401
SCM_DEFINE (scm_fsync, "fsync", 1, 0, 0,
1403
"Copies any unwritten data for the specified output file descriptor to disk.\n"
1404
"If @var{port/fd} is a port, its buffer is flushed before the underlying\n"
1405
"file descriptor is fsync'd.\n"
1406
"The return value is unspecified.")
1407
#define FUNC_NAME s_scm_fsync
1411
object = SCM_COERCE_OUTPORT (object);
1413
if (SCM_OPFPORTP (object))
1416
fdes = SCM_FPORT_FDES (object);
1419
fdes = scm_to_int (object);
1421
if (fsync (fdes) == -1)
1423
return SCM_UNSPECIFIED;
1428
SCM_DEFINE (scm_symlink, "symlink", 2, 0, 0,
1429
(SCM oldpath, SCM newpath),
1430
"Create a symbolic link named @var{path-to} with the value (i.e., pointing to)\n"
1431
"@var{path-from}. The return value is unspecified.")
1432
#define FUNC_NAME s_scm_symlink
1436
STRING2_SYSCALL (oldpath, c_oldpath,
1438
val = symlink (c_oldpath, c_newpath));
1441
return SCM_UNSPECIFIED;
1444
#endif /* HAVE_SYMLINK */
1446
#ifdef HAVE_READLINK
1447
SCM_DEFINE (scm_readlink, "readlink", 1, 0, 0,
1449
"Return the value of the symbolic link named by @var{path} (a\n"
1450
"string), i.e., the file that the link points to.")
1451
#define FUNC_NAME s_scm_readlink
1459
scm_dynwind_begin (0);
1461
c_path = scm_to_locale_string (path);
1462
scm_dynwind_free (c_path);
1464
buf = scm_malloc (size);
1466
while ((rv = readlink (c_path, buf, size)) == size)
1470
buf = scm_malloc (size);
1474
int save_errno = errno;
1479
result = scm_take_locale_stringn (buf, rv);
1485
#endif /* HAVE_READLINK */
1488
SCM_DEFINE (scm_lstat, "lstat", 1, 0, 0,
1490
"Similar to @code{stat}, but does not follow symbolic links, i.e.,\n"
1491
"it will return information about a symbolic link itself, not the\n"
1492
"file it points to. @var{path} must be a string.")
1493
#define FUNC_NAME s_scm_lstat
1496
struct stat_or_stat64 stat_temp;
1498
STRING_SYSCALL (str, c_str, rv = lstat_or_lstat64 (c_str, &stat_temp));
1503
SCM_SYSERROR_MSG ("~A: ~S",
1504
scm_list_2 (scm_strerror (scm_from_int (en)), str),
1507
return scm_stat2scm (&stat_temp);
1510
#endif /* HAVE_LSTAT */
1512
SCM_DEFINE (scm_copy_file, "copy-file", 2, 0, 0,
1513
(SCM oldfile, SCM newfile),
1514
"Copy the file specified by @var{path-from} to @var{path-to}.\n"
1515
"The return value is unspecified.")
1516
#define FUNC_NAME s_scm_copy_file
1518
char *c_oldfile, *c_newfile;
1522
struct stat_or_stat64 oldstat;
1524
scm_dynwind_begin (0);
1526
c_oldfile = scm_to_locale_string (oldfile);
1527
scm_dynwind_free (c_oldfile);
1528
c_newfile = scm_to_locale_string (newfile);
1529
scm_dynwind_free (c_newfile);
1531
oldfd = open_or_open64 (c_oldfile, O_RDONLY);
1536
SCM_SYSCALL (rv = fstat_Win32 (oldfd, &oldstat));
1538
SCM_SYSCALL (rv = fstat_or_fstat64 (oldfd, &oldstat));
1541
goto err_close_oldfd;
1543
/* use POSIX flags instead of 07777?. */
1544
newfd = open_or_open64 (c_newfile, O_WRONLY | O_CREAT | O_TRUNC,
1545
oldstat.st_mode & 07777);
1553
while ((n = read (oldfd, buf, sizeof buf)) > 0)
1554
if (write (newfd, buf, n) != n)
1561
if (close (newfd) == -1)
1565
return SCM_UNSPECIFIED;
1570
/* Filename manipulation */
1574
SCM_DEFINE (scm_dirname, "dirname", 1, 0, 0,
1576
"Return the directory name component of the file name\n"
1577
"@var{filename}. If @var{filename} does not contain a directory\n"
1578
"component, @code{.} is returned.")
1579
#define FUNC_NAME s_scm_dirname
1583
unsigned long int len;
1585
SCM_VALIDATE_STRING (1, filename);
1587
s = scm_i_string_chars (filename);
1588
len = scm_i_string_length (filename);
1592
while (i >= 0 && (s[i] == '/' || s[i] == '\\')) --i;
1593
while (i >= 0 && (s[i] != '/' && s[i] != '\\')) --i;
1594
while (i >= 0 && (s[i] == '/' || s[i] == '\\')) --i;
1596
while (i >= 0 && s[i] == '/') --i;
1597
while (i >= 0 && s[i] != '/') --i;
1598
while (i >= 0 && s[i] == '/') --i;
1599
#endif /* ndef __MINGW32__ */
1603
if (len > 0 && (s[0] == '/' || s[0] == '\\'))
1605
if (len > 0 && s[0] == '/')
1606
#endif /* ndef __MINGW32__ */
1607
return scm_c_substring (filename, 0, 1);
1609
return scm_dot_string;
1612
return scm_c_substring (filename, 0, i + 1);
1616
SCM_DEFINE (scm_basename, "basename", 1, 1, 0,
1617
(SCM filename, SCM suffix),
1618
"Return the base name of the file name @var{filename}. The\n"
1619
"base name is the file name without any directory components.\n"
1620
"If @var{suffix} is provided, and is equal to the end of\n"
1621
"@var{basename}, it is removed also.")
1622
#define FUNC_NAME s_scm_basename
1624
const char *f, *s = 0;
1627
SCM_VALIDATE_STRING (1, filename);
1628
f = scm_i_string_chars (filename);
1629
len = scm_i_string_length (filename);
1631
if (SCM_UNBNDP (suffix))
1635
SCM_VALIDATE_STRING (2, suffix);
1636
s = scm_i_string_chars (suffix);
1637
j = scm_i_string_length (suffix) - 1;
1641
while (i >= 0 && (f[i] == '/' || f[i] == '\\')) --i;
1643
while (i >= 0 && f[i] == '/') --i;
1644
#endif /* ndef __MINGW32__ */
1646
while (i >= 0 && j >= 0 && f[i] == s[j]) --i, --j;
1650
while (i >= 0 && f[i] != '/' && f[i] != '\\') --i;
1652
while (i >= 0 && f[i] != '/') --i;
1653
#endif /* ndef __MINGW32__ */
1657
if (len > 0 && (f[0] == '/' || f[0] == '\\'))
1659
if (len > 0 && f[0] == '/')
1660
#endif /* ndef __MINGW32__ */
1661
return scm_c_substring (filename, 0, 1);
1663
return scm_dot_string;
1666
return scm_c_substring (filename, i+1, end+1);
1677
scm_tc16_dir = scm_make_smob_type ("directory", 0);
1678
scm_set_smob_free (scm_tc16_dir, scm_dir_free);
1679
scm_set_smob_print (scm_tc16_dir, scm_dir_print);
1681
scm_dot_string = scm_permanent_object (scm_from_locale_string ("."));
1684
scm_c_define ("O_RDONLY", scm_from_long (O_RDONLY));
1687
scm_c_define ("O_WRONLY", scm_from_long (O_WRONLY));
1690
scm_c_define ("O_RDWR", scm_from_long (O_RDWR));
1693
scm_c_define ("O_CREAT", scm_from_long (O_CREAT));
1696
scm_c_define ("O_EXCL", scm_from_long (O_EXCL));
1699
scm_c_define ("O_NOCTTY", scm_from_long (O_NOCTTY));
1702
scm_c_define ("O_TRUNC", scm_from_long (O_TRUNC));
1705
scm_c_define ("O_APPEND", scm_from_long (O_APPEND));
1708
scm_c_define ("O_NONBLOCK", scm_from_long (O_NONBLOCK));
1711
scm_c_define ("O_NDELAY", scm_from_long (O_NDELAY));
1714
scm_c_define ("O_SYNC", scm_from_long (O_SYNC));
1717
scm_c_define ("O_LARGEFILE", scm_from_long (O_LARGEFILE));
1721
scm_c_define ("F_DUPFD", scm_from_long (F_DUPFD));
1724
scm_c_define ("F_GETFD", scm_from_long (F_GETFD));
1727
scm_c_define ("F_SETFD", scm_from_long (F_SETFD));
1730
scm_c_define ("F_GETFL", scm_from_long (F_GETFL));
1733
scm_c_define ("F_SETFL", scm_from_long (F_SETFL));
1736
scm_c_define ("F_GETOWN", scm_from_long (F_GETOWN));
1739
scm_c_define ("F_SETOWN", scm_from_long (F_SETOWN));
1742
scm_c_define ("FD_CLOEXEC", scm_from_long (FD_CLOEXEC));
1745
#include "libguile/filesys.x"
added
removed
libguile/filesys.c
