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/* $Id: quote_argv.c 3235 2018-10-28 14:15:29Z bird $ */
/** @file
* quote_argv - Correctly quote argv for spawn, windows specific.
*/
/*
* Copyright (c) 2007-2016 knut st. osmundsen <bird-kBuild-spamx@anduin.net>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Alternatively, the content of this file may be used under the terms of the
* GPL version 2 or later, or LGPL version 2.1 or later.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "quote_argv.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#ifndef KBUILD_OS_WINDOWS
# error "KBUILD_OS_WINDOWS not defined"
#endif
/**
* Checks if this is an Watcom option where we must just pass thru the string
* as-is.
*
* This is currnetly only used for -d (defining macros).
*
* @returns 1 if pass-thru, 0 if not.
* @param pszArg The argument to consider.
*/
static int isWatcomPassThruOption(const char *pszArg)
{
char ch = *pszArg++;
if (ch != '-' && ch != '/')
return 0;
ch = *pszArg++;
switch (ch)
{
/* Example: -d+VAR="string-value" */
case 'd':
if (ch == '+')
ch = *pszArg++;
if (!isalpha(ch) && ch != '_')
return 0;
return 1;
default:
return 0;
}
}
/**
* Replaces arguments in need of quoting.
*
* For details on how MSC parses the command line, see "Parsing C Command-Line
* Arguments": http://msdn.microsoft.com/en-us/library/a1y7w461.aspx
*
* @returns 0 on success, -1 if out of memory.
* @param argc The argument count.
* @param argv The argument vector.
* @param fWatcomBrainDamage Set if we're catering for wcc, wcc386 or similar
* OpenWatcom tools. They seem to follow some
* ancient or home made quoting convention.
* @param fFreeOrLeak Whether to free replaced argv members
* (non-zero), or just leak them (zero). This
* depends on which argv you're working on.
* Suggest doing the latter if it's main()'s argv.
*/
int quote_argv(int argc, char **argv, int fWatcomBrainDamage, int fFreeOrLeak)
{
int i;
for (i = 0; i < argc; i++)
{
char *const pszOrgOrg = argv[i];
const char *pszOrg = pszOrgOrg;
size_t cchOrg = strlen(pszOrg);
const char *pszQuotes = (const char *)memchr(pszOrg, '"', cchOrg);
const char *pszProblem = NULL;
if ( pszQuotes
|| cchOrg == 0
|| (pszProblem = (const char *)memchr(pszOrg, ' ', cchOrg)) != NULL
|| (pszProblem = (const char *)memchr(pszOrg, '\t', cchOrg)) != NULL
|| (pszProblem = (const char *)memchr(pszOrg, '\n', cchOrg)) != NULL
|| (pszProblem = (const char *)memchr(pszOrg, '\r', cchOrg)) != NULL
|| (pszProblem = (const char *)memchr(pszOrg, '&', cchOrg)) != NULL
|| (pszProblem = (const char *)memchr(pszOrg, '>', cchOrg)) != NULL
|| (pszProblem = (const char *)memchr(pszOrg, '<', cchOrg)) != NULL
|| (pszProblem = (const char *)memchr(pszOrg, '|', cchOrg)) != NULL
|| (pszProblem = (const char *)memchr(pszOrg, '%', cchOrg)) != NULL
|| (pszProblem = (const char *)memchr(pszOrg, '\'', cchOrg)) != NULL
|| ( !fWatcomBrainDamage
&& (pszProblem = (const char *)memchr(pszOrg, '=', cchOrg)) != NULL)
|| ( fWatcomBrainDamage
&& (pszProblem = (const char *)memchr(pszOrg, '\\', cchOrg)) != NULL)
)
{
char ch;
int fComplicated = pszQuotes || (cchOrg > 0 && pszOrg[cchOrg - 1] == '\\');
size_t cchNew = fComplicated ? cchOrg * 2 + 2 : cchOrg + 2;
char *pszNew = (char *)malloc(cchNew + 1 /*term*/);
if (!pszNew)
return -1;
argv[i] = pszNew;
/* Watcom does not grok stuff like "-i=c:\program files\watcom\h",
it think it's a source specification. In that case the quote
must follow the equal sign. */
if (fWatcomBrainDamage)
{
size_t cchUnquoted = 0;
if (pszOrg[0] == '@') /* Response file quoting: @"file name.rsp" */
cchUnquoted = 1;
else if (pszOrg[0] == '-' || pszOrg[0] == '/') /* Switch quoting. */
{
const char *pszNeedQuoting;
if (isWatcomPassThruOption(pszOrg))
{
argv[i] = pszOrgOrg;
free(pszNew);
continue; /* No quoting needed, skip to the next argument. */
}
pszNeedQuoting = (const char *)memchr(pszOrg, '=', cchOrg); /* For -i=dir and similar. */
if ( pszNeedQuoting == NULL
|| (uintptr_t)pszNeedQuoting > (uintptr_t)(pszProblem ? pszProblem : pszQuotes))
pszNeedQuoting = pszProblem ? pszProblem : pszQuotes;
else
pszNeedQuoting++;
cchUnquoted = pszNeedQuoting - pszOrg;
}
if (cchUnquoted)
{
memcpy(pszNew, pszOrg, cchUnquoted);
pszNew += cchUnquoted;
pszOrg += cchUnquoted;
cchOrg -= cchUnquoted;
}
}
*pszNew++ = '"';
if (fComplicated)
{
while ((ch = *pszOrg++) != '\0')
{
if (ch == '"')
{
*pszNew++ = '\\';
*pszNew++ = '"';
}
else if (ch == '\\')
{
/* Backslashes are a bit complicated, they depends on
whether a quotation mark follows them or not. They
only require escaping if one does. */
unsigned cSlashes = 1;
while ((ch = *pszOrg) == '\\')
{
pszOrg++;
cSlashes++;
}
if (ch == '"' || ch == '\0') /* We put a " at the EOS. */
{
while (cSlashes-- > 0)
{
*pszNew++ = '\\';
*pszNew++ = '\\';
}
}
else
while (cSlashes-- > 0)
*pszNew++ = '\\';
}
else
*pszNew++ = ch;
}
}
else
{
memcpy(pszNew, pszOrg, cchOrg);
pszNew += cchOrg;
}
*pszNew++ = '"';
*pszNew = '\0';
if (fFreeOrLeak)
free(pszOrgOrg);
}
}
/*for (i = 0; i < argc; i++) fprintf(stderr, "argv[%u]=%s;;\n", i, argv[i]);*/
return 0;
}
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