/**
* Opens the output file.
*
* @returns Command exit, error messages written using RTMsg*.
*
* @param pszFile The input filename.
* @param pOpts The options, szOutput will be filled in by this
* function on success.
* @param phVfsIos Where to return the output stream handle.
*
* @remarks This is actually not quite the way we need to do things.
*
* First of all, we need a GZIP file system stream for a real GZIP
* implementation, since there may be more than one file in the gzipped
* file.
*
* Second, we need to open the output files as we encounter files in the input
* file system stream. The gzip format contains timestamp and usually a
* filename, the default is to use this name (see the --no-name
* option).
*/
static RTEXITCODE gzipOpenOutput(const char *pszFile, PRTGZIPCMDOPTS pOpts, PRTVFSIOSTREAM phVfsIos)
{
int rc;
if (!strcmp(pszFile, "-") || pOpts->fStdOut)
{
strcpy(pOpts->szOutput, "-");
if ( !pOpts->fForce
&& !pOpts->fDecompress
&& gzipIsStdHandleATty(RTHANDLESTD_OUTPUT))
return RTMsgErrorExit(RTEXITCODE_SYNTAX,
"Yeah, right. I'm not writing any compressed data to the terminal without --force.\n");
rc = RTVfsIoStrmFromStdHandle(RTHANDLESTD_OUTPUT,
RTFILE_O_WRITE | RTFILE_O_OPEN | RTFILE_O_DENY_NONE,
true /*fLeaveOpen*/,
phVfsIos);
if (RT_FAILURE(rc))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error opening standard output: %Rrc", rc);
}
else
{
Assert(!RTVfsChainIsSpec(pszFile));
/* Construct an output filename. */
rc = RTStrCopy(pOpts->szOutput, sizeof(pOpts->szOutput), pszFile);
if (RT_FAILURE(rc))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error constructing output filename: %Rrc", rc);
if (pOpts->fDecompress)
{
/** @todo take filename from archive? */
size_t cchSuff = strlen(pOpts->pszSuff); Assert(cchSuff > 0);
size_t cch = strlen(pOpts->szOutput);
if ( cch <= cchSuff
|| strcmp(&pOpts->szOutput[cch - cchSuff], pOpts->pszSuff))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "Input file does not end with: '%s'", pOpts->pszSuff);
pOpts->szOutput[cch - cchSuff] = '\0';
if (!RTPathFilename(pOpts->szOutput))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error constructing output filename: Input file name is all suffix.");
}
else
{
rc = RTStrCat(pOpts->szOutput, sizeof(pOpts->szOutput), pOpts->pszSuff);
if (RT_FAILURE(rc))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error constructing output filename: %Rrc", rc);
}
/* Open the output file. */
uint32_t fOpen = RTFILE_O_WRITE | RTFILE_O_DENY_WRITE;
if (pOpts->fForce)
fOpen |= RTFILE_O_CREATE_REPLACE;
else
fOpen |= RTFILE_O_CREATE;
rc = RTVfsIoStrmOpenNormal(pOpts->szOutput, fOpen, phVfsIos);
if (RT_FAILURE(rc))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error opening output file '%s': %Rrc", pOpts->szOutput, rc);
}
return RTEXITCODE_SUCCESS;
}
/**
* Opens the input file.
*
* @returns Command exit, error messages written using RTMsg*.
*
* @param pszFile The input filename.
* @param pOpts The options, szOutput will be filled in by this
* function on success.
* @param phVfsIos Where to return the input stream handle.
*/
static RTEXITCODE gzipOpenInput(const char *pszFile, PRTGZIPCMDOPTS pOpts, PRTVFSIOSTREAM phVfsIos)
{
int rc;
pOpts->pszInput = pszFile;
if (!strcmp(pszFile, "-"))
{
if ( !pOpts->fForce
&& pOpts->fDecompress
&& gzipIsStdHandleATty(RTHANDLESTD_OUTPUT))
return RTMsgErrorExit(RTEXITCODE_SYNTAX,
"Yeah, right. I'm not reading any compressed data from the terminal without --force.\n");
rc = RTVfsIoStrmFromStdHandle(RTHANDLESTD_INPUT,
RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_NONE,
true /*fLeaveOpen*/,
phVfsIos);
if (RT_FAILURE(rc))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error opening standard input: %Rrc", rc);
}
else
{
uint32_t offError = 0;
RTERRINFOSTATIC ErrInfo;
rc = RTVfsChainOpenIoStream(pszFile, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_WRITE,
phVfsIos, &offError, RTErrInfoInitStatic(&ErrInfo));
if (RT_FAILURE(rc))
return RTVfsChainMsgErrorExitFailure("RTVfsChainOpenIoStream", pszFile, rc, offError, &ErrInfo.Core);
}
return RTEXITCODE_SUCCESS;
}
/**
* Opens the input file.
*
* @returns Command exit, error messages written using RTMsg*.
*
* @param pszFile The input filename.
* @param pOpts The options, szOutput will be filled in by this
* function on success.
* @param phVfsIos Where to return the input stream handle.
*/
static RTEXITCODE gzipOpenInput(const char *pszFile, PRTGZIPCMDOPTS pOpts, PRTVFSIOSTREAM phVfsIos)
{
int rc;
pOpts->pszInput = pszFile;
if (!strcmp(pszFile, "-"))
{
if ( !pOpts->fForce
&& pOpts->fDecompress
&& gzipIsStdHandleATty(RTHANDLESTD_OUTPUT))
return RTMsgErrorExit(RTEXITCODE_SYNTAX,
"Yeah, right. I'm not reading any compressed data from the terminal without --force.\n");
rc = RTVfsIoStrmFromStdHandle(RTHANDLESTD_INPUT,
RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_NONE,
true /*fLeaveOpen*/,
phVfsIos);
if (RT_FAILURE(rc))
return RTMsgErrorExit(RTEXITCODE_FAILURE, "Error opening standard input: %Rrc", rc);
}
else
{
const char *pszError;
rc = RTVfsChainOpenIoStream(pszFile, RTFILE_O_READ | RTFILE_O_OPEN | RTFILE_O_DENY_WRITE, phVfsIos, &pszError);
if (RT_FAILURE(rc))
{
if (pszError && *pszError)
return RTMsgErrorExit(RTEXITCODE_FAILURE,
"RTVfsChainOpenIoStream failed with rc=%Rrc:\n"
" '%s'\n"
" %*s^\n",
rc, pszFile, pszError - pszFile, "");
return RTMsgErrorExit(RTEXITCODE_FAILURE,
"RTVfsChainOpenIoStream failed with rc=%Rrc: '%s'",
rc, pszFile);
}
}
return RTEXITCODE_SUCCESS;
}