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/* Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003, 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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#include "libguile/_scm.h"
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#include "libguile/ioext.h"
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#include "libguile/fports.h"
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#include "libguile/feature.h"
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#include "libguile/ports.h"
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#include "libguile/strings.h"
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#include "libguile/validate.h"
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#include "libguile/dynwind.h"
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SCM_DEFINE (scm_ftell, "ftell", 1, 0, 0,
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"Return an integer representing the current position of\n"
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"@var{fd/port}, measured from the beginning. Equivalent to:\n"
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"(seek port 0 SEEK_CUR)\n"
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#define FUNC_NAME s_scm_ftell
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return scm_seek (fd_port, SCM_INUM0, scm_from_int (SEEK_CUR));
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SCM_DEFINE (scm_redirect_port, "redirect-port", 2, 0, 0,
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"This procedure takes two ports and duplicates the underlying file\n"
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"descriptor from @var{old-port} into @var{new-port}. The\n"
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"current file descriptor in @var{new-port} will be closed.\n"
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"After the redirection the two ports will share a file position\n"
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"and file status flags.\n\n"
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"The return value is unspecified.\n\n"
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"Unexpected behaviour can result if both ports are subsequently used\n"
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"and the original and/or duplicate ports are buffered.\n\n"
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"This procedure does not have any side effects on other ports or\n"
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#define FUNC_NAME s_scm_redirect_port
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int ans, oldfd, newfd;
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old = SCM_COERCE_OUTPORT (old);
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new = SCM_COERCE_OUTPORT (new);
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SCM_VALIDATE_OPFPORT (1, old);
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SCM_VALIDATE_OPFPORT (2, new);
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oldfd = SCM_FPORT_FDES (old);
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fp = SCM_FSTREAM (new);
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scm_t_port *pt = SCM_PTAB_ENTRY (new);
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scm_t_port *old_pt = SCM_PTAB_ENTRY (old);
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scm_t_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (new)];
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/* must flush to old fdes. */
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if (pt->rw_active == SCM_PORT_WRITE)
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else if (pt->rw_active == SCM_PORT_READ)
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ans = dup2 (oldfd, newfd);
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pt->rw_random = old_pt->rw_random;
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/* continue using existing buffers, even if inappropriate. */
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return SCM_UNSPECIFIED;
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SCM_DEFINE (scm_dup_to_fdes, "dup->fdes", 1, 1, 0,
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(SCM fd_or_port, SCM fd),
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"Return a new integer file descriptor referring to the open file\n"
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"designated by @var{fd_or_port}, which must be either an open\n"
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"file port or a file descriptor.")
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#define FUNC_NAME s_scm_dup_to_fdes
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int oldfd, newfd, rv;
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fd_or_port = SCM_COERCE_OUTPORT (fd_or_port);
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if (scm_is_integer (fd_or_port))
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oldfd = scm_to_int (fd_or_port);
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SCM_VALIDATE_OPFPORT (1, fd_or_port);
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oldfd = SCM_FPORT_FDES (fd_or_port);
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fd = scm_from_int (newfd);
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newfd = scm_to_int (fd);
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scm_evict_ports (newfd); /* see scsh manual. */
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rv = dup2 (oldfd, newfd);
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SCM_DEFINE (scm_dup2, "dup2", 2, 0, 0,
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(SCM oldfd, SCM newfd),
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"A simple wrapper for the @code{dup2} system call.\n"
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"Copies the file descriptor @var{oldfd} to descriptor\n"
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"number @var{newfd}, replacing the previous meaning\n"
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"of @var{newfd}. Both @var{oldfd} and @var{newfd} must\n"
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"Unlike for dup->fdes or primitive-move->fdes, no attempt\n"
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"is made to move away ports which are using @var{newfd}.\n"
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"The return value is unspecified.")
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#define FUNC_NAME s_scm_dup2
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c_oldfd = scm_to_int (oldfd);
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c_newfd = scm_to_int (newfd);
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rv = dup2 (c_oldfd, c_newfd);
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return SCM_UNSPECIFIED;
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SCM_DEFINE (scm_fileno, "fileno", 1, 0, 0,
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"Return the integer file descriptor underlying @var{port}. Does\n"
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"not change its revealed count.")
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#define FUNC_NAME s_scm_fileno
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port = SCM_COERCE_OUTPORT (port);
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SCM_VALIDATE_OPFPORT (1, port);
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return scm_from_int (SCM_FPORT_FDES (port));
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/* GJB:FIXME:: why does this not throw
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an error if the arg is not a port?
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This proc as is would be better names isattyport?
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if it is not going to assume that the arg is a port
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[cmm] I don't see any problem with the above. why should a type
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predicate assume _anything_ about its argument?
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SCM_DEFINE (scm_isatty_p, "isatty?", 1, 0, 0,
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"Return @code{#t} if @var{port} is using a serial non--file\n"
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"device, otherwise @code{#f}.")
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#define FUNC_NAME s_scm_isatty_p
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port = SCM_COERCE_OUTPORT (port);
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if (!SCM_OPFPORTP (port))
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rv = isatty (SCM_FPORT_FDES (port));
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return scm_from_bool(rv);
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SCM_DEFINE (scm_fdopen, "fdopen", 2, 0, 0,
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(SCM fdes, SCM modes),
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"Return a new port based on the file descriptor @var{fdes}.\n"
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"Modes are given by the string @var{modes}. The revealed count\n"
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"of the port is initialized to zero. The modes string is the\n"
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"same as that accepted by @ref{File Ports, open-file}.")
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#define FUNC_NAME s_scm_fdopen
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return scm_i_fdes_to_port (scm_to_int (fdes),
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scm_i_mode_bits (modes), SCM_BOOL_F);
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/* Move a port's underlying file descriptor to a given value.
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* Returns #f if fdes is already the given value.
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* MOVE->FDES is implemented in Scheme and calls this primitive.
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SCM_DEFINE (scm_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0,
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"Moves the underlying file descriptor for @var{port} to the integer\n"
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"value @var{fdes} without changing the revealed count of @var{port}.\n"
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"Any other ports already using this descriptor will be automatically\n"
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"shifted to new descriptors and their revealed counts reset to zero.\n"
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"The return value is @code{#f} if the file descriptor already had the\n"
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"required value or @code{#t} if it was moved.")
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#define FUNC_NAME s_scm_primitive_move_to_fdes
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port = SCM_COERCE_OUTPORT (port);
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SCM_VALIDATE_OPFPORT (1, port);
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stream = SCM_FSTREAM (port);
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old_fd = stream->fdes;
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new_fd = scm_to_int (fd);
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if (old_fd == new_fd)
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scm_evict_ports (new_fd);
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rv = dup2 (old_fd, new_fd);
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stream->fdes = new_fd;
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SCM_SYSCALL (close (old_fd));
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/* Return a list of ports using a given file descriptor. */
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SCM_DEFINE (scm_fdes_to_ports, "fdes->ports", 1, 0, 0,
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"Return a list of existing ports which have @var{fdes} as an\n"
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"underlying file descriptor, without changing their revealed\n"
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#define FUNC_NAME s_scm_fdes_to_ports
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SCM result = SCM_EOL;
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int_fd = scm_to_int (fd);
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scm_i_scm_pthread_mutex_lock (&scm_i_port_table_mutex);
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for (i = 0; i < scm_i_port_table_size; i++)
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if (SCM_OPFPORTP (scm_i_port_table[i]->port)
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&& ((scm_t_fport *) scm_i_port_table[i]->stream)->fdes == int_fd)
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result = scm_cons (scm_i_port_table[i]->port, result);
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scm_i_pthread_mutex_unlock (&scm_i_port_table_mutex);
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scm_add_feature ("i/o-extensions");
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#include "libguile/ioext.x"
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removed
libguile/ioext.c
