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gcc/libgfortran/io/inquire.c
Jerry DeLisle 01b9977477 re PR fortran/44931 (For INPUT_UNIT, INQUIRE NAME= should not return "stdin") 
2010-07-28  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libfortran/44931
	* io/inquire.c (inquire_via_unit): Use ttyname to return actual device
	file name for stdin, stdout, and stderr.  If ttyname does not succeed
	fall back to default names for these units. Include string.h to allow
	using strlen function.
	* unix.c: Remove typedef of unix_stream structure, move to unix.h.
	* unix.h: Add typedef of unix_stream structure so that it is
	accessible to inquire.c.

From-SVN: r162667
2010-07-29 01:32:23 +00:00

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/* Copyright (C) 2002, 2003, 2005, 2007, 2009, 2010
Free Software Foundation, Inc.
Contributed by Andy Vaught
This file is part of the GNU Fortran 95 runtime library (libgfortran).
Libgfortran is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
Libgfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
/* Implement the non-IOLENGTH variant of the INQUIRY statement */
#include <string.h>
#include "io.h"
#include "unix.h"
static const char undefined[] = "UNDEFINED";
/* inquire_via_unit()-- Inquiry via unit number. The unit might not exist. */
static void
inquire_via_unit (st_parameter_inquire *iqp, gfc_unit * u)
{
const char *p;
GFC_INTEGER_4 cf = iqp->common.flags;
if ((cf & IOPARM_INQUIRE_HAS_EXIST) != 0)
{
*iqp->exist = (iqp->common.unit >= 0
&& iqp->common.unit <= GFC_INTEGER_4_HUGE);
if ((cf & IOPARM_INQUIRE_HAS_FILE) == 0)
{
if (!(*iqp->exist))
*iqp->common.iostat = LIBERROR_BAD_UNIT;
*iqp->exist = *iqp->exist
&& (*iqp->common.iostat != LIBERROR_BAD_UNIT);
}
}
if ((cf & IOPARM_INQUIRE_HAS_OPENED) != 0)
*iqp->opened = (u != NULL);
if ((cf & IOPARM_INQUIRE_HAS_NUMBER) != 0)
*iqp->number = (u != NULL) ? u->unit_number : -1;
if ((cf & IOPARM_INQUIRE_HAS_NAMED) != 0)
*iqp->named = (u != NULL && u->flags.status != STATUS_SCRATCH);
if ((cf & IOPARM_INQUIRE_HAS_NAME) != 0
&& u != NULL && u->flags.status != STATUS_SCRATCH)
{
#ifdef HAVE_TTYNAME
if (u->unit_number == options.stdin_unit
|| u->unit_number == options.stdout_unit
|| u->unit_number == options.stderr_unit)
{
char * tmp = ttyname (((unix_stream *) u->s)->fd);
if (tmp != NULL)
{
int tmplen = strlen (tmp);
fstrcpy (iqp->name, iqp->name_len, tmp, tmplen);
}
else /* If ttyname does not work, go with the default. */
fstrcpy (iqp->name, iqp->name_len, u->file, u->file_len);
}
else
#endif
fstrcpy (iqp->name, iqp->name_len, u->file, u->file_len);
}
if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
{
if (u == NULL)
p = undefined;
else
switch (u->flags.access)
{
case ACCESS_SEQUENTIAL:
p = "SEQUENTIAL";
break;
case ACCESS_DIRECT:
p = "DIRECT";
break;
case ACCESS_STREAM:
p = "STREAM";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad access");
}
cf_strcpy (iqp->access, iqp->access_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_SEQUENTIAL) != 0)
{
if (u == NULL)
p = inquire_sequential (NULL, 0);
else
switch (u->flags.access)
{
case ACCESS_DIRECT:
case ACCESS_STREAM:
p = "NO";
break;
case ACCESS_SEQUENTIAL:
p = "YES";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad access");
}
cf_strcpy (iqp->sequential, iqp->sequential_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_DIRECT) != 0)
{
if (u == NULL)
p = inquire_direct (NULL, 0);
else
switch (u->flags.access)
{
case ACCESS_SEQUENTIAL:
case ACCESS_STREAM:
p = "NO";
break;
case ACCESS_DIRECT:
p = "YES";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad access");
}
cf_strcpy (iqp->direct, iqp->direct_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_FORM) != 0)
{
if (u == NULL)
p = undefined;
else
switch (u->flags.form)
{
case FORM_FORMATTED:
p = "FORMATTED";
break;
case FORM_UNFORMATTED:
p = "UNFORMATTED";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad form");
}
cf_strcpy (iqp->form, iqp->form_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_FORMATTED) != 0)
{
if (u == NULL)
p = inquire_formatted (NULL, 0);
else
switch (u->flags.form)
{
case FORM_FORMATTED:
p = "YES";
break;
case FORM_UNFORMATTED:
p = "NO";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad form");
}
cf_strcpy (iqp->formatted, iqp->formatted_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_UNFORMATTED) != 0)
{
if (u == NULL)
p = inquire_unformatted (NULL, 0);
else
switch (u->flags.form)
{
case FORM_FORMATTED:
p = "NO";
break;
case FORM_UNFORMATTED:
p = "YES";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad form");
}
cf_strcpy (iqp->unformatted, iqp->unformatted_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_RECL_OUT) != 0)
*iqp->recl_out = (u != NULL) ? u->recl : 0;
if ((cf & IOPARM_INQUIRE_HAS_STRM_POS_OUT) != 0)
*iqp->strm_pos_out = (u != NULL) ? u->strm_pos : 0;
if ((cf & IOPARM_INQUIRE_HAS_NEXTREC) != 0)
{
/* This only makes sense in the context of DIRECT access. */
if (u != NULL && u->flags.access == ACCESS_DIRECT)
*iqp->nextrec = u->last_record + 1;
else
*iqp->nextrec = 0;
}
if ((cf & IOPARM_INQUIRE_HAS_BLANK) != 0)
{
if (u == NULL || u->flags.form != FORM_FORMATTED)
p = undefined;
else
switch (u->flags.blank)
{
case BLANK_NULL:
p = "NULL";
break;
case BLANK_ZERO:
p = "ZERO";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad blank");
}
cf_strcpy (iqp->blank, iqp->blank_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_PAD) != 0)
{
if (u == NULL || u->flags.form != FORM_FORMATTED)
p = undefined;
else
switch (u->flags.pad)
{
case PAD_YES:
p = "YES";
break;
case PAD_NO:
p = "NO";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad pad");
}
cf_strcpy (iqp->pad, iqp->pad_len, p);
}
if (cf & IOPARM_INQUIRE_HAS_FLAGS2)
{
GFC_INTEGER_4 cf2 = iqp->flags2;
if ((cf2 & IOPARM_INQUIRE_HAS_PENDING) != 0)
*iqp->pending = 0;
if ((cf2 & IOPARM_INQUIRE_HAS_ID) != 0)
*iqp->id = 0;
if ((cf2 & IOPARM_INQUIRE_HAS_ENCODING) != 0)
{
if (u == NULL || u->flags.form != FORM_FORMATTED)
p = undefined;
else
switch (u->flags.encoding)
{
case ENCODING_DEFAULT:
p = "UNKNOWN";
break;
case ENCODING_UTF8:
p = "UTF-8";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad encoding");
}
cf_strcpy (iqp->encoding, iqp->encoding_len, p);
}
if ((cf2 & IOPARM_INQUIRE_HAS_DECIMAL) != 0)
{
if (u == NULL || u->flags.form != FORM_FORMATTED)
p = undefined;
else
switch (u->flags.decimal)
{
case DECIMAL_POINT:
p = "POINT";
break;
case DECIMAL_COMMA:
p = "COMMA";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad comma");
}
cf_strcpy (iqp->decimal, iqp->decimal_len, p);
}
if ((cf2 & IOPARM_INQUIRE_HAS_ASYNCHRONOUS) != 0)
{
if (u == NULL)
p = undefined;
else
switch (u->flags.async)
{
case ASYNC_YES:
p = "YES";
break;
case ASYNC_NO:
p = "NO";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad async");
}
cf_strcpy (iqp->asynchronous, iqp->asynchronous_len, p);
}
if ((cf2 & IOPARM_INQUIRE_HAS_SIGN) != 0)
{
if (u == NULL)
p = undefined;
else
switch (u->flags.sign)
{
case SIGN_PROCDEFINED:
p = "PROCESSOR_DEFINED";
break;
case SIGN_SUPPRESS:
p = "SUPPRESS";
break;
case SIGN_PLUS:
p = "PLUS";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad sign");
}
cf_strcpy (iqp->sign, iqp->sign_len, p);
}
if ((cf2 & IOPARM_INQUIRE_HAS_ROUND) != 0)
{
if (u == NULL)
p = undefined;
else
switch (u->flags.round)
{
case ROUND_UP:
p = "UP";
break;
case ROUND_DOWN:
p = "DOWN";
break;
case ROUND_ZERO:
p = "ZERO";
break;
case ROUND_NEAREST:
p = "NEAREST";
break;
case ROUND_COMPATIBLE:
p = "COMPATIBLE";
break;
case ROUND_PROCDEFINED:
p = "PROCESSOR_DEFINED";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad round");
}
cf_strcpy (iqp->round, iqp->round_len, p);
}
if ((cf2 & IOPARM_INQUIRE_HAS_SIZE) != 0)
{
if (u == NULL)
*iqp->size = -1;
else
*iqp->size = file_size (u->file, (gfc_charlen_type) u->file_len);
}
}
if ((cf & IOPARM_INQUIRE_HAS_POSITION) != 0)
{
if (u == NULL || u->flags.access == ACCESS_DIRECT)
p = undefined;
else
switch (u->flags.position)
{
case POSITION_REWIND:
p = "REWIND";
break;
case POSITION_APPEND:
p = "APPEND";
break;
case POSITION_ASIS:
p = "ASIS";
break;
default:
/* if not direct access, it must be
either REWIND, APPEND, or ASIS.
ASIS seems to be the best default */
p = "ASIS";
break;
}
cf_strcpy (iqp->position, iqp->position_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_ACTION) != 0)
{
if (u == NULL)
p = undefined;
else
switch (u->flags.action)
{
case ACTION_READ:
p = "READ";
break;
case ACTION_WRITE:
p = "WRITE";
break;
case ACTION_READWRITE:
p = "READWRITE";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad action");
}
cf_strcpy (iqp->action, iqp->action_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_READ) != 0)
{
p = (u == NULL) ? inquire_read (NULL, 0) :
inquire_read (u->file, u->file_len);
cf_strcpy (iqp->read, iqp->read_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_WRITE) != 0)
{
p = (u == NULL) ? inquire_write (NULL, 0) :
inquire_write (u->file, u->file_len);
cf_strcpy (iqp->write, iqp->write_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_READWRITE) != 0)
{
p = (u == NULL) ? inquire_readwrite (NULL, 0) :
inquire_readwrite (u->file, u->file_len);
cf_strcpy (iqp->readwrite, iqp->readwrite_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_DELIM) != 0)
{
if (u == NULL || u->flags.form != FORM_FORMATTED)
p = undefined;
else
switch (u->flags.delim)
{
case DELIM_NONE:
p = "NONE";
break;
case DELIM_QUOTE:
p = "QUOTE";
break;
case DELIM_APOSTROPHE:
p = "APOSTROPHE";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad delim");
}
cf_strcpy (iqp->delim, iqp->delim_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_PAD) != 0)
{
if (u == NULL || u->flags.form != FORM_FORMATTED)
p = undefined;
else
switch (u->flags.pad)
{
case PAD_NO:
p = "NO";
break;
case PAD_YES:
p = "YES";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad pad");
}
cf_strcpy (iqp->pad, iqp->pad_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_CONVERT) != 0)
{
if (u == NULL)
p = undefined;
else
switch (u->flags.convert)
{
/* big_endian is 0 for little-endian, 1 for big-endian. */
case GFC_CONVERT_NATIVE:
p = big_endian ? "BIG_ENDIAN" : "LITTLE_ENDIAN";
break;
case GFC_CONVERT_SWAP:
p = big_endian ? "LITTLE_ENDIAN" : "BIG_ENDIAN";
break;
default:
internal_error (&iqp->common, "inquire_via_unit(): Bad convert");
}
cf_strcpy (iqp->convert, iqp->convert_len, p);
}
}
/* inquire_via_filename()-- Inquiry via filename. This subroutine is
* only used if the filename is *not* connected to a unit number. */
static void
inquire_via_filename (st_parameter_inquire *iqp)
{
const char *p;
GFC_INTEGER_4 cf = iqp->common.flags;
if ((cf & IOPARM_INQUIRE_HAS_EXIST) != 0)
*iqp->exist = file_exists (iqp->file, iqp->file_len);
if ((cf & IOPARM_INQUIRE_HAS_OPENED) != 0)
*iqp->opened = 0;
if ((cf & IOPARM_INQUIRE_HAS_NUMBER) != 0)
*iqp->number = -1;
if ((cf & IOPARM_INQUIRE_HAS_NAMED) != 0)
*iqp->named = 1;
if ((cf & IOPARM_INQUIRE_HAS_NAME) != 0)
fstrcpy (iqp->name, iqp->name_len, iqp->file, iqp->file_len);
if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
cf_strcpy (iqp->access, iqp->access_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_SEQUENTIAL) != 0)
{
p = "UNKNOWN";
cf_strcpy (iqp->sequential, iqp->sequential_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_DIRECT) != 0)
{
p = "UNKNOWN";
cf_strcpy (iqp->direct, iqp->direct_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_FORM) != 0)
cf_strcpy (iqp->form, iqp->form_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_FORMATTED) != 0)
{
p = "UNKNOWN";
cf_strcpy (iqp->formatted, iqp->formatted_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_UNFORMATTED) != 0)
{
p = "UNKNOWN";
cf_strcpy (iqp->unformatted, iqp->unformatted_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_RECL_OUT) != 0)
*iqp->recl_out = 0;
if ((cf & IOPARM_INQUIRE_HAS_NEXTREC) != 0)
*iqp->nextrec = 0;
if ((cf & IOPARM_INQUIRE_HAS_BLANK) != 0)
cf_strcpy (iqp->blank, iqp->blank_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_PAD) != 0)
cf_strcpy (iqp->pad, iqp->pad_len, undefined);
if (cf & IOPARM_INQUIRE_HAS_FLAGS2)
{
GFC_INTEGER_4 cf2 = iqp->flags2;
if ((cf2 & IOPARM_INQUIRE_HAS_ENCODING) != 0)
cf_strcpy (iqp->encoding, iqp->encoding_len, undefined);
if ((cf2 & IOPARM_INQUIRE_HAS_DELIM) != 0)
cf_strcpy (iqp->delim, iqp->delim_len, undefined);
if ((cf2 & IOPARM_INQUIRE_HAS_DECIMAL) != 0)
cf_strcpy (iqp->decimal, iqp->decimal_len, undefined);
if ((cf2 & IOPARM_INQUIRE_HAS_DELIM) != 0)
cf_strcpy (iqp->delim, iqp->delim_len, undefined);
if ((cf2 & IOPARM_INQUIRE_HAS_PAD) != 0)
cf_strcpy (iqp->pad, iqp->pad_len, undefined);
if ((cf2 & IOPARM_INQUIRE_HAS_ENCODING) != 0)
cf_strcpy (iqp->encoding, iqp->encoding_len, undefined);
if ((cf2 & IOPARM_INQUIRE_HAS_SIZE) != 0)
*iqp->size = file_size (iqp->file, iqp->file_len);
}
if ((cf & IOPARM_INQUIRE_HAS_POSITION) != 0)
cf_strcpy (iqp->position, iqp->position_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
cf_strcpy (iqp->access, iqp->access_len, undefined);
if ((cf & IOPARM_INQUIRE_HAS_READ) != 0)
{
p = inquire_read (iqp->file, iqp->file_len);
cf_strcpy (iqp->read, iqp->read_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_WRITE) != 0)
{
p = inquire_write (iqp->file, iqp->file_len);
cf_strcpy (iqp->write, iqp->write_len, p);
}
if ((cf & IOPARM_INQUIRE_HAS_READWRITE) != 0)
{
p = inquire_read (iqp->file, iqp->file_len);
cf_strcpy (iqp->readwrite, iqp->readwrite_len, p);
}
}
/* Library entry point for the INQUIRE statement (non-IOLENGTH
form). */
extern void st_inquire (st_parameter_inquire *);
export_proto(st_inquire);
void
st_inquire (st_parameter_inquire *iqp)
{
gfc_unit *u;
library_start (&iqp->common);
if ((iqp->common.flags & IOPARM_INQUIRE_HAS_FILE) == 0)
{
u = find_unit (iqp->common.unit);
inquire_via_unit (iqp, u);
}
else
{
u = find_file (iqp->file, iqp->file_len);
if (u == NULL)
inquire_via_filename (iqp);
else
inquire_via_unit (iqp, u);
}
if (u != NULL)
unlock_unit (u);
library_end ();
}
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