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Fix test mode and write to null

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Fix test mode to not always return success.
Don't ask for permission to overwrite `nulmark`.

Before:

    > echo "hello world" > file
    > lz4 -t file
    successfully decoded 12 bytes
    > lz4 -tf file
    successfully decoded 12 bytes
    > lz4 file null
    Warning : /dev/null already exists
    Overwrite ? (Y/n) : n
    Error 12 : No. Operation aborted : /dev/null already exists
    > lz4 file /dev/null
    Warning : /dev/null already exists
    Overwrite ? (Y/n) : n
    Error 12 : No. Operation aborted : /dev/null already exists

After:

    > lz4 -t file
    Error 44 : Unrecognized header : file cannot be decoded
    > lz4 -tf file
    Error 44 : Unrecognized header : file cannot be decoded
    > lz4 file null
    Compressed 12 bytes into 31 bytes ==> 258.33%
    > lz4 file /dev/null
    Compressed 12 bytes into 31 bytes ==> 258.33%
This commit is contained in:
Nick Terrell 2016-11-03 15:41:09 -07:00
parent 6f68a1692e
commit 3dcafd35d4
3 changed files with 15 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
programs/lz4cli.c
View File

@ -393,7 +393,7 @@ int main(int argc, const char** argv)
case 'c': forceStdout=1; output_filename=stdoutmark; displayLevel=1; break;
/* Test integrity */
case 't': decode=1; LZ4IO_setOverwrite(1); output_filename=nulmark; break;
case 't': decode=1; LZ4IO_setPassThrough(0); output_filename=nulmark; break;
/* Overwrite */
case 'f': LZ4IO_setOverwrite(1); break;

12
programs/lz4io.c
View File

@ -136,6 +136,7 @@ static clock_t g_time = 0;
* Local Parameters
**************************************/
static int g_overwrite = 1;
static int g_passThrough = 1;
static int g_blockSizeId = LZ4IO_BLOCKSIZEID_DEFAULT;
static int g_blockChecksum = 0;
static int g_streamChecksum = 1;
@ -184,6 +185,13 @@ int LZ4IO_setOverwrite(int yes)
return g_overwrite;
}
/* Default setting : passThrough = 1; return : passThrough mode (0/1) */
int LZ4IO_setPassThrough(int yes)
{
g_passThrough = (yes!=0);
return g_passThrough;
}
/* blockSizeID : valid values : 4-5-6-7 */
int LZ4IO_setBlockSizeID(int bsid)
{
@ -283,7 +291,7 @@ static int LZ4IO_getFiles(const char* input_filename, const char* output_filenam
} else {
/* Check if destination file already exists */
*pfoutput=0;
if (output_filename != nulmark) *pfoutput = fopen( output_filename, "rb" );
if (strcmp(output_filename, nulmark)) *pfoutput = fopen( output_filename, "rb" );
if (*pfoutput!=0) {
fclose(*pfoutput);
if (!g_overwrite) {
@ -908,7 +916,7 @@ static unsigned long long selectDecoder(dRess_t ress, FILE* finput, FILE* foutpu
EXTENDED_FORMAT; /* macro extension for custom formats */
default:
if (nbCalls == 1) { /* just started */
if (g_overwrite)
if (g_passThrough && g_overwrite)
return LZ4IO_passThrough(finput, foutput, MNstore);
EXM_THROW(44,"Unrecognized header : file cannot be decoded"); /* Wrong magic number at the beginning of 1st stream */
}

4
programs/lz4io.h
View File

@ -63,6 +63,10 @@ int LZ4IO_decompressMultipleFilenames(const char** inFileNamesTable, int ifntSiz
return : overwrite mode (0/1) */
int LZ4IO_setOverwrite(int yes);
/* Default setting : passThrough = 1;
return : passThrough mode (0/1) */
int LZ4IO_setPassThrough(int yes);
/* blockSizeID : valid values : 4-5-6-7
return : -1 if error, blockSize if OK */
int LZ4IO_setBlockSizeID(int blockSizeID);