98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
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/*
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* Copyright (C) 2001-2003 Hewlett-Packard Co.
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* Contributed by Stephane Eranian <eranian@hpl.hp.com>
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*
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* Copyright (C) 2001 Silicon Graphics, Inc.
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* Contributed by Brent Casavant <bcasavan@sgi.com>
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*
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* Copyright (C) 2006-2009 Intel Corporation
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* Contributed by Fenghua Yu <fenghua.yu@intel.com>
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* Contributed by Bibo Mao <bibo.mao@intel.com>
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* Contributed by Chandramouli Narayanan <mouli@linux.intel.com>
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*
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* This file is part of the ELILO, the EFI Linux boot loader.
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*
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* ELILO is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* ELILO 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with ELILO; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Please check out the elilo.txt for complete documentation on how
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* to use this program.
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*/
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#include <efi.h>
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#include <efilib.h>
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#include <argify.h>
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#define MAX_ARGS 256
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#define CHAR_SPACE L' '
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#define DEBUG 0
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INTN
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argify(CHAR16 *buf, UINTN len, CHAR16 **argv)
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{
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UINTN i=0, j=0;
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CHAR16 *p = buf;
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if (buf == 0) {
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argv[0] = NULL;
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return 0;
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}
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/* len represents the number of bytes, not the number of 16 bytes chars */
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len = len >> 1;
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/*
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* Here we use CHAR_NULL as the terminator rather than the length
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* because it seems like the EFI shell return rather bogus values for it.
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* Apparently, we are guaranteed to find the '\0' character in the buffer
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* where the real input arguments stop, so we use it instead.
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*/
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for(;;) {
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while (buf[i] == CHAR_SPACE && buf[i] != CHAR_NULL && i < len) i++;
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if (buf[i] == CHAR_NULL || i == len) goto end;
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p = buf+i;
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i++;
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while (buf[i] != CHAR_SPACE && buf[i] != CHAR_NULL && i < len) i++;
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argv[j++] = p;
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if (buf[i] == CHAR_NULL) goto end;
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buf[i] = CHAR_NULL;
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if (i == len) goto end;
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i++;
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if (j == MAX_ARGS-1) {
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Print(L"too many arguments (%d) truncating\n", j);
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goto end;
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}
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}
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end:
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argv[j] = NULL;
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return j;
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}
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