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afsctool.c
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#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/param.h>
#include <sys/mount.h>
#include <fts.h>
#include <sys/xattr.h>
#include <hfs/hfs_format.h>
#include <unistd.h>
#include <zlib.h>
#include <CoreServices/CoreServices.h>
const char *sizeunit10_short[] = {"KB", "MB", "GB", "TB", "PB", "EB"};
const char *sizeunit10_long[] = {"kilobytes", "megabytes", "gigabytes", "terabytes", "petabytes", "exabytes"};
const long long int sizeunit10[] = {1000, 1000 * 1000, 1000 * 1000 * 1000, (long long int) 1000 * 1000 * 1000 * 1000, (long long int) 1000 * 1000 * 1000 * 1000 * 1000, (long long int) 1000 * 1000 * 1000 * 1000 * 1000 * 1000};
const char *sizeunit2_short[] = {"KiB", "MiB", "GiB", "TiB", "PiB", "EiB"};
const char *sizeunit2_long[] = {"kibibytes", "mebibytes", "gibibytes", "tebibytes", "pebibytes", "exbibytes"};
const long long int sizeunit2[] = {1024, 1024 * 1024, 1024 * 1024 * 1024, (long long int) 1024 * 1024 * 1024 * 1024, (long long int) 1024 * 1024 * 1024 * 1024 * 1024, (long long int) 1024 * 1024 * 1024 * 1024 * 1024 * 1024};
struct folder_info
{
long long int uncompressed_size;
long long int uncompressed_size_rounded;
long long int compressed_size;
long long int compressed_size_rounded;
long long int compattr_size;
long long int total_size;
long long int num_compressed;
long long int num_files;
long long int num_hard_link_files;
long long int num_folders;
long long int num_hard_link_folders;
long long int maxSize;
int print_info;
int compressionlevel;
double minSavings;
bool print_files;
bool compress_files;
bool check_files;
bool check_hard_links;
};
char* getSizeStr(long long int size, long long int size_rounded)
{
static char sizeStr[90];
int unit2, unit10;
for (unit2 = 0; unit2 + 1 < sizeof(sizeunit2) && (size_rounded / sizeunit2[unit2 + 1]) > 0; unit2++);
for (unit10 = 0; unit10 + 1 < sizeof(sizeunit10) && (size_rounded / sizeunit10[unit10 + 1]) > 0; unit10++);
sprintf(sizeStr, "%lld bytes / ", size);
switch (unit10)
{
case 0:
sprintf(sizeStr, "%s%0.0f %s (%s) / ", sizeStr, (double) size_rounded / sizeunit10[unit10], sizeunit10_short[unit10], sizeunit10_long[unit10]);
break;
case 1:
sprintf(sizeStr, "%s%.12g %s (%s) / ", sizeStr, (double) (((long long int) ((double) size_rounded / sizeunit10[unit10] * 100) + 5) / 10) / 10, sizeunit10_short[unit10], sizeunit10_long[unit10]);
break;
default:
sprintf(sizeStr, "%s%0.12g %s (%s) / ", sizeStr, (double) (((long long int) ((double) size_rounded / sizeunit10[unit10] * 1000) + 5) / 10) / 100, sizeunit10_short[unit10], sizeunit10_long[unit10]);
break;
}
switch (unit2)
{
case 0:
sprintf(sizeStr, "%s%0.0f %s (%s)", sizeStr, (double) size_rounded / sizeunit2[unit2], sizeunit2_short[unit2], sizeunit2_long[unit2]);
break;
case 1:
sprintf(sizeStr, "%s%.12g %s (%s)", sizeStr, (double) (((long long int) ((double) size_rounded / sizeunit2[unit2] * 100) + 5) / 10) / 10, sizeunit2_short[unit2], sizeunit2_long[unit2]);
break;
default:
sprintf(sizeStr, "%s%0.12g %s (%s)", sizeStr, (double) (((long long int) ((double) size_rounded / sizeunit2[unit2] * 1000) + 5) / 10) / 100, sizeunit2_short[unit2], sizeunit2_long[unit2]);
break;
}
return sizeStr;
}
void compressFile(const char *inFile, struct stat *inFileInfo, long long int maxSize, int compressionlevel, double minSavings, bool checkFiles)
{
FILE *in;
struct statfs fsInfo;
unsigned int compblksize = 0x10000, numBlocks, outdecmpfsSize = 0;
void *inBuf, *outBuf, *outBufBlock, *outdecmpfsBuf, *currBlock, *blockStart;
long long int inBufPos, filesize = inFileInfo->st_size;
unsigned long int cmpedsize;
char *xattrnames, *curr_attr;
ssize_t xattrnamesize;
UInt32 cmpf = 0x636D7066;
struct timeval times[2];
times[0].tv_sec = inFileInfo->st_atimespec.tv_sec;
times[0].tv_usec = inFileInfo->st_atimespec.tv_nsec / 1000;
times[1].tv_sec = inFileInfo->st_mtimespec.tv_sec;
times[1].tv_usec = inFileInfo->st_mtimespec.tv_nsec / 1000;
if (statfs(inFile, &fsInfo) < 0)
return;
if (fsInfo.f_type != 17 && fsInfo.f_type != 23 && fsInfo.f_type != 24) {
printf("Expecting f_type of 17, 23 or 24. f_type is %i.\n", fsInfo.f_type);
return;
}
if (!S_ISREG(inFileInfo->st_mode))
return;
if ((inFileInfo->st_flags & UF_COMPRESSED) != 0)
return;
if (filesize > maxSize && maxSize != 0)
return;
if (filesize == 0)
return;
if (chflags(inFile, UF_COMPRESSED | inFileInfo->st_flags) < 0 || chflags(inFile, inFileInfo->st_flags) < 0)
{
fprintf(stderr, "%s: chflags: %s\n", inFile, strerror(errno));
return;
}
xattrnamesize = listxattr(inFile, NULL, 0, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW);
if (xattrnamesize > 0)
{
xattrnames = (char *) malloc(xattrnamesize);
if (xattrnames == NULL)
{
fprintf(stderr, "%s: malloc error, unable to get file information\n", inFile);
return;
}
if ((xattrnamesize = listxattr(inFile, xattrnames, xattrnamesize, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW)) <= 0)
{
fprintf(stderr, "%s: listxattr: %s\n", inFile, strerror(errno));
free(xattrnames);
return;
}
for (curr_attr = xattrnames; curr_attr < xattrnames + xattrnamesize; curr_attr += strlen(curr_attr) + 1)
{
if ((strcmp(curr_attr, "com.apple.ResourceFork") == 0 && strlen(curr_attr) == 22) ||
(strcmp(curr_attr, "com.apple.decmpfs") == 0 && strlen(curr_attr) == 17))
return;
}
free(xattrnames);
}
numBlocks = (filesize + compblksize - 1) / compblksize;
if ((filesize + 0x13A + (numBlocks * 9)) > 2147483647)
return;
in = fopen(inFile, "r+");
if (in == NULL)
{
fprintf(stderr, "%s: %s\n", inFile, strerror(errno));
return;
}
inBuf = malloc(filesize);
if (inBuf == NULL)
{
fprintf(stderr, "%s: malloc error, unable to allocate input buffer\n", inFile);
fclose(in);
utimes(inFile, times);
return;
}
if (fread(inBuf, filesize, 1, in) != 1)
{
fprintf(stderr, "%s: Error reading file\n", inFile);
fclose(in);
utimes(inFile, times);
free(inBuf);
return;
}
fclose(in);
outBuf = malloc(filesize + 0x13A + (numBlocks * 9));
if (outBuf == NULL)
{
fprintf(stderr, "%s: malloc error, unable to allocate output buffer\n", inFile);
utimes(inFile, times);
free(inBuf);
return;
}
outdecmpfsBuf = malloc(3802);
if (outdecmpfsBuf == NULL)
{
fprintf(stderr, "%s: malloc error, unable to allocate xattr buffer\n", inFile);
utimes(inFile, times);
free(inBuf);
free(outBuf);
return;
}
outBufBlock = malloc(compressBound(compblksize));
if (outBufBlock == NULL)
{
fprintf(stderr, "%s: malloc error, unable to allocate compression buffer\n", inFile);
utimes(inFile, times);
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
return;
}
*(UInt32 *) outdecmpfsBuf = EndianU32_NtoL(cmpf);
*(UInt32 *) (outdecmpfsBuf + 4) = EndianU32_NtoL(4);
*(UInt64 *) (outdecmpfsBuf + 8) = EndianU64_NtoL(filesize);
outdecmpfsSize = 0x10;
*(UInt32 *) outBuf = EndianU32_NtoB(0x100);
*(UInt32 *) (outBuf + 12) = EndianU32_NtoB(0x32);
memset(outBuf + 16, 0, 0xF0);
blockStart = outBuf + 0x104;
*(UInt32 *) blockStart = EndianU32_NtoL(numBlocks);
currBlock = blockStart + 0x4 + (numBlocks * 8);
for (inBufPos = 0; inBufPos < filesize; inBufPos += compblksize, currBlock += cmpedsize)
{
cmpedsize = compressBound(compblksize);
if (compress2(outBufBlock, &cmpedsize, inBuf + inBufPos, ((filesize - inBufPos) > compblksize) ? compblksize : filesize - inBufPos, compressionlevel) != Z_OK)
{
utimes(inFile, times);
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
free(outBufBlock);
return;
}
if (cmpedsize > (((filesize - inBufPos) > compblksize) ? compblksize : filesize - inBufPos))
{
*(unsigned char *) outBufBlock = 0xFF;
memcpy(outBufBlock + 1, inBuf + inBufPos, ((filesize - inBufPos) > compblksize) ? compblksize : filesize - inBufPos);
cmpedsize = ((filesize - inBufPos) > compblksize) ? compblksize : filesize - inBufPos;
cmpedsize++;
}
if (((cmpedsize + outdecmpfsSize) <= 3802) && (numBlocks <= 1))
{
*(UInt32 *) (outdecmpfsBuf + 4) = EndianU32_NtoL(3);
memcpy(outdecmpfsBuf + outdecmpfsSize, outBufBlock, cmpedsize);
outdecmpfsSize += cmpedsize;
break;
}
memcpy(currBlock, outBufBlock, cmpedsize);
*(UInt32 *) (blockStart + ((inBufPos / compblksize) * 8) + 0x4) = EndianU32_NtoL(currBlock - blockStart);
*(UInt32 *) (blockStart + ((inBufPos / compblksize) * 8) + 0x8) = EndianU32_NtoL(cmpedsize);
}
if (EndianU32_LtoN(*(UInt32 *) (outdecmpfsBuf + 4)) == 4)
{
if ((((double) (currBlock - outBuf + 50) / filesize) >= (1.0 - minSavings / 100) && minSavings != 0.0) ||
currBlock - outBuf + 50 >= filesize)
{
utimes(inFile, times);
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
free(outBufBlock);
return;
}
*(UInt32 *) (outBuf + 4) = EndianU32_NtoB(currBlock - outBuf);
*(UInt32 *) (outBuf + 8) = EndianU32_NtoB(currBlock - outBuf - 0x100);
*(UInt32 *) (blockStart - 4) = EndianU32_NtoB(currBlock - outBuf - 0x104);
memset(currBlock, 0, 24);
*(UInt16 *) (currBlock + 24) = EndianU16_NtoB(0x1C);
*(UInt16 *) (currBlock + 26) = EndianU16_NtoB(0x32);
*(UInt16 *) (currBlock + 28) = 0;
*(UInt32 *) (currBlock + 30) = EndianU32_NtoB(cmpf);
*(UInt32 *) (currBlock + 34) = EndianU32_NtoB(0xA);
*(UInt64 *) (currBlock + 38) = EndianU64_NtoL(0xFFFF0100);
*(UInt32 *) (currBlock + 46) = 0;
if (setxattr(inFile, "com.apple.ResourceFork", outBuf, currBlock - outBuf + 50, 0, XATTR_NOFOLLOW | XATTR_CREATE) < 0)
{
fprintf(stderr, "%s: setxattr: %s\n", inFile, strerror(errno));
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
free(outBufBlock);
return;
}
}
if (setxattr(inFile, "com.apple.decmpfs", outdecmpfsBuf, outdecmpfsSize, 0, XATTR_NOFOLLOW | XATTR_CREATE) < 0)
{
fprintf(stderr, "%s: setxattr: %s\n", inFile, strerror(errno));
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
free(outBufBlock);
return;
}
in = fopen(inFile, "w");
if (in == NULL)
{
fprintf(stderr, "%s: %s\n", inFile, strerror(errno));
return;
}
fclose(in);
if (chflags(inFile, UF_COMPRESSED | inFileInfo->st_flags) < 0)
{
fprintf(stderr, "%s: chflags: %s\n", inFile, strerror(errno));
if (removexattr(inFile, "com.apple.decmpfs", XATTR_NOFOLLOW | XATTR_SHOWCOMPRESSION) < 0)
{
fprintf(stderr, "%s: removexattr: %s\n", inFile, strerror(errno));
}
if (EndianU32_LtoN(*(UInt32 *) (outdecmpfsBuf + 4)) == 4 &&
removexattr(inFile, "com.apple.ResourceFork", XATTR_NOFOLLOW | XATTR_SHOWCOMPRESSION) < 0)
{
fprintf(stderr, "%s: removexattr: %s\n", inFile, strerror(errno));
}
in = fopen(inFile, "w");
if (in == NULL)
{
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
free(outBufBlock);
fprintf(stderr, "%s: %s\n", inFile, strerror(errno));
return;
}
if (fwrite(inBuf, filesize, 1, in) != 1)
{
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
free(outBufBlock);
fprintf(stderr, "%s: Error writing to file\n", inFile);
return;
}
fclose(in);
utimes(inFile, times);
return;
}
if (checkFiles)
{
lstat(inFile, inFileInfo);
in = fopen(inFile, "r");
if (in == NULL)
{
fprintf(stderr, "%s: %s\n", inFile, strerror(errno));
return;
}
if (inFileInfo->st_size != filesize ||
fread(outBuf, filesize, 1, in) != 1 ||
memcmp(outBuf, inBuf, filesize) != 0)
{
fclose(in);
printf("%s: Compressed file check failed, reverting file changes\n", inFile);
if (chflags(inFile, (~UF_COMPRESSED) & inFileInfo->st_flags) < 0)
{
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
free(outBufBlock);
fprintf(stderr, "%s: chflags: %s\n", inFile, strerror(errno));
return;
}
if (removexattr(inFile, "com.apple.decmpfs", XATTR_NOFOLLOW | XATTR_SHOWCOMPRESSION) < 0)
{
fprintf(stderr, "%s: removexattr: %s\n", inFile, strerror(errno));
}
if (EndianU32_LtoN(*(UInt32 *) (outdecmpfsBuf + 4)) == 4 &&
removexattr(inFile, "com.apple.ResourceFork", XATTR_NOFOLLOW | XATTR_SHOWCOMPRESSION) < 0)
{
fprintf(stderr, "%s: removexattr: %s\n", inFile, strerror(errno));
}
in = fopen(inFile, "w");
if (in == NULL)
{
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
free(outBufBlock);
fprintf(stderr, "%s: %s\n", inFile, strerror(errno));
return;
}
if (fwrite(inBuf, filesize, 1, in) != 1)
{
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
free(outBufBlock);
fprintf(stderr, "%s: Error writing to file\n", inFile);
return;
}
}
fclose(in);
}
utimes(inFile, times);
free(inBuf);
free(outBuf);
free(outdecmpfsBuf);
free(outBufBlock);
}
void decompressFile(const char *inFile, struct stat *inFileInfo)
{
FILE *in;
int uncmpret;
unsigned int compblksize = 0x10000, numBlocks, currBlock;
long long int filesize;
unsigned long int uncmpedsize;
void *inBuf = NULL, *outBuf, *indecmpfsBuf = NULL, *blockStart;
char *xattrnames, *curr_attr;
ssize_t xattrnamesize, indecmpfsLen = 0, inRFLen = 0, getxattrret, RFpos = 0;
struct timeval times[2];
times[0].tv_sec = inFileInfo->st_atimespec.tv_sec;
times[0].tv_usec = inFileInfo->st_atimespec.tv_nsec / 1000;
times[1].tv_sec = inFileInfo->st_mtimespec.tv_sec;
times[1].tv_usec = inFileInfo->st_mtimespec.tv_nsec / 1000;
if (!S_ISREG(inFileInfo->st_mode))
return;
if ((inFileInfo->st_flags & UF_COMPRESSED) == 0)
return;
xattrnamesize = listxattr(inFile, NULL, 0, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW);
if (xattrnamesize > 0)
{
xattrnames = (char *) malloc(xattrnamesize);
if (xattrnames == NULL)
{
fprintf(stderr, "%s: malloc error, unable to get file information\n", inFile);
return;
}
if ((xattrnamesize = listxattr(inFile, xattrnames, xattrnamesize, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW)) <= 0)
{
fprintf(stderr, "%s: listxattr: %s\n", inFile, strerror(errno));
free(xattrnames);
return;
}
for (curr_attr = xattrnames; curr_attr < xattrnames + xattrnamesize; curr_attr += strlen(curr_attr) + 1)
{
if (strcmp(curr_attr, "com.apple.ResourceFork") == 0 && strlen(curr_attr) == 22)
{
inRFLen = getxattr(inFile, curr_attr, NULL, 0, 0, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW);
if (inRFLen < 0)
{
fprintf(stderr, "%s: getxattr: %s\n", inFile, strerror(errno));
free(xattrnames);
return;
}
if (inRFLen != 0)
{
inBuf = malloc(inRFLen);
if (inBuf == NULL)
{
fprintf(stderr, "%s: malloc error, unable to allocate input buffer\n", inFile);
return;
}
do
{
getxattrret = getxattr(inFile, curr_attr, inBuf + RFpos, inRFLen - RFpos, RFpos, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW);
if (getxattrret < 0)
{
fprintf(stderr, "getxattr: %s\n", strerror(errno));
free(xattrnames);
return;
}
RFpos += getxattrret;
} while (RFpos < inRFLen && getxattrret > 0);
}
}
if (strcmp(curr_attr, "com.apple.decmpfs") == 0 && strlen(curr_attr) == 17)
{
indecmpfsLen = getxattr(inFile, curr_attr, NULL, 0, 0, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW);
if (indecmpfsLen < 0)
{
fprintf(stderr, "%s: getxattr: %s\n", inFile, strerror(errno));
free(xattrnames);
return;
}
if (indecmpfsLen != 0)
{
indecmpfsBuf = malloc(indecmpfsLen);
if (indecmpfsBuf == NULL)
{
fprintf(stderr, "%s: malloc error, unable to allocate xattr buffer\n", inFile);
utimes(inFile, times);
free(inBuf);
return;
}
if (indecmpfsLen != 0)
{
indecmpfsBuf = malloc(indecmpfsLen);
if (indecmpfsBuf == NULL)
{
fprintf(stderr, "%s: malloc error, unable to get file information\n", inFile);
return;
}
indecmpfsLen = getxattr(inFile, curr_attr, indecmpfsBuf, indecmpfsLen, 0, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW);
if (indecmpfsLen < 0)
{
fprintf(stderr, "getxattr: %s\n", strerror(errno));
free(xattrnames);
return;
}
}
}
}
}
free(xattrnames);
}
if (indecmpfsBuf == NULL)
{
fprintf(stderr, "%s: Decompression failed; file flags indicate file is compressed but it does not have a com.apple.decmpfs extended attribute\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
return;
}
if (indecmpfsLen < 0x10)
{
fprintf(stderr, "%s: Decompression failed; extended attribute com.apple.decmpfs is only %ld bytes (it is required to have a 16 byte header)\n", inFile, indecmpfsLen);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
return;
}
filesize = EndianU64_LtoN(*(UInt64 *) (indecmpfsBuf + 8));
if (filesize == 0)
{
fprintf(stderr, "%s: Decompression failed; file size given in header is 0\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
return;
}
outBuf = malloc(filesize);
if (outBuf == NULL)
{
fprintf(stderr, "%s: malloc error, unable to allocate output buffer\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
return;
}
if (EndianU32_LtoN(*(UInt32 *) (indecmpfsBuf + 4)) == 4)
{
if (inBuf == NULL)
{
fprintf(stderr, "%s: Decompression failed; resource fork required for compression type 4 but none exists\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
if (inRFLen < 0x13A ||
inRFLen < EndianU32_BtoN(*(UInt32 *) inBuf) + 0x4)
{
fprintf(stderr, "%s: Decompression failed; resource fork data is incomplete\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
blockStart = inBuf + EndianU32_BtoN(*(UInt32 *) inBuf) + 0x4;
numBlocks = EndianU32_NtoL(*(UInt32 *) blockStart);
if (inRFLen < EndianU32_BtoN(*(UInt32 *) inBuf) + 0x3A + (numBlocks * 8))
{
fprintf(stderr, "%s: Decompression failed; resource fork data is incomplete\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
if (compblksize * (numBlocks - 1) + (filesize % compblksize) > filesize)
{
fprintf(stderr, "%s: Decompression failed; file size given in header is incorrect\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
for (currBlock = 0; currBlock < numBlocks; currBlock++)
{
if (blockStart + EndianU32_LtoN(*(UInt32 *) (blockStart + 0x4 + (currBlock * 8))) + EndianU32_LtoN(*(UInt32 *) (blockStart + 0x8 + (currBlock * 8))) > inBuf + inRFLen)
{
fprintf(stderr, "%s: Decompression failed; resource fork data is incomplete\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
if (currBlock + 1 != numBlocks)
uncmpedsize = compblksize;
else
uncmpedsize = (filesize - (currBlock * compblksize) < compblksize) ? filesize - (currBlock * compblksize) : compblksize;
if ((compblksize * currBlock) + uncmpedsize > filesize)
{
fprintf(stderr, "%s: Decompression failed; file size given in header is incorrect\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
if ((*(unsigned char *) (blockStart + EndianU32_LtoN(*(UInt32 *) (blockStart + 0x4 + (currBlock * 8))))) == 0xFF)
{
uncmpedsize = EndianU32_LtoN(*(UInt32 *) (blockStart + 0x8 + (currBlock * 8))) - 1;
memcpy(outBuf + (compblksize * currBlock), blockStart + EndianU32_LtoN(*(UInt32 *) (blockStart + 0x4 + (currBlock * 8))) + 1, uncmpedsize);
}
else
{
if ((uncmpret = uncompress(outBuf + (compblksize * currBlock), &uncmpedsize, blockStart + EndianU32_LtoN(*(UInt32 *) (blockStart + 0x4 + (currBlock * 8))), EndianU32_LtoN(*(UInt32 *) (blockStart + 0x8 + (currBlock * 8))))) != Z_OK)
{
if (uncmpret == Z_BUF_ERROR)
{
fprintf(stderr, "%s: Decompression failed; uncompressed data block too large\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
else if (uncmpret == Z_DATA_ERROR)
{
fprintf(stderr, "%s: Decompression failed; compressed data block is corrupted\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
else if (uncmpret == Z_MEM_ERROR)
{
fprintf(stderr, "%s: Decompression failed; out of memory\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
else
{
fprintf(stderr, "%s: Decompression failed; an error occurred during decompression\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
}
}
if (uncmpedsize != ((filesize - (currBlock * compblksize) < compblksize) ? filesize - (currBlock * compblksize) : compblksize))
{
fprintf(stderr, "%s: Decompression failed; uncompressed data block too small\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
}
}
else if (EndianU32_LtoN(*(UInt32 *) (indecmpfsBuf + 4)) == 3)
{
if (indecmpfsLen == 0x10)
{
fprintf(stderr, "%s: Decompression failed; compression type 3 expects compressed data in extended attribute com.apple.decmpfs but none exists\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
uncmpedsize = filesize;
if ((*(unsigned char *) (indecmpfsBuf + 0x10)) == 0xFF)
{
uncmpedsize = indecmpfsLen - 0x11;
memcpy(outBuf, indecmpfsBuf + 0x11, uncmpedsize);
}
else
{
if ((uncmpret = uncompress(outBuf, &uncmpedsize, indecmpfsBuf + 0x10, indecmpfsLen - 0x10)) != Z_OK)
{
if (uncmpret == Z_BUF_ERROR)
{
fprintf(stderr, "%s: Decompression failed; uncompressed data too large\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
else if (uncmpret == Z_DATA_ERROR)
{
fprintf(stderr, "%s: Decompression failed; compressed data is corrupted\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
else if (uncmpret == Z_MEM_ERROR)
{
fprintf(stderr, "%s: Decompression failed; out of memory\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
else
{
fprintf(stderr, "%s: Decompression failed; an error occurred during decompression\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
}
}
if (uncmpedsize != filesize)
{
fprintf(stderr, "%s: Decompression failed; uncompressed data block too small\n", inFile);
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
}
else
{
fprintf(stderr, "%s: Decompression failed; unknown compression type %u\n", inFile, (unsigned int) EndianU32_LtoN(*(UInt32 *) (indecmpfsBuf + 4)));
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
if (chflags(inFile, (~UF_COMPRESSED) & inFileInfo->st_flags) < 0)
{
fprintf(stderr, "%s: chflags: %s\n", inFile, strerror(errno));
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
return;
}
in = fopen(inFile, "r+");
if (in == NULL)
{
fprintf(stderr, "%s: %s\n", inFile, strerror(errno));
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
utimes(inFile, times);
return;
}
if (fwrite(outBuf, filesize, 1, in) != 1)
{
fclose(in);
if (chflags(inFile, UF_COMPRESSED | inFileInfo->st_flags) < 0)
{
fprintf(stderr, "%s: chflags: %s\n", inFile, strerror(errno));
}
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
utimes(inFile, times);
fprintf(stderr, "%s: Error writing to file\n", inFile);
return;
}
fclose(in);
if (removexattr(inFile, "com.apple.decmpfs", XATTR_NOFOLLOW | XATTR_SHOWCOMPRESSION) < 0)
{
fprintf(stderr, "%s: removexattr: %s\n", inFile, strerror(errno));
}
if (EndianU32_LtoN(*(UInt32 *) (indecmpfsBuf + 4)) == 4 &&
removexattr(inFile, "com.apple.ResourceFork", XATTR_NOFOLLOW | XATTR_SHOWCOMPRESSION) < 0)
{
fprintf(stderr, "%s: removexattr: %s\n", inFile, strerror(errno));
}
if (inBuf != NULL)
free(inBuf);
if (indecmpfsBuf != NULL)
free(indecmpfsBuf);
free(outBuf);
utimes(inFile, times);
}
bool checkForHardLink(const char *filepath, const struct stat *fileInfo, const struct folder_info *folderinfo)
{
static ino_t *hardLinks = NULL;
static char **paths = NULL, *list_item;
static long int currSize = 0, numLinks = 0;
long int right_pos, left_pos = 0, curr_pos = 1;
if (fileInfo != NULL && fileInfo->st_nlink > 1)
{
if (hardLinks == NULL)
{
currSize = 1;
hardLinks = (ino_t *) malloc(currSize * sizeof(ino_t));
if (hardLinks == NULL)
{
fprintf(stderr, "Malloc error allocating memory for list of file hard links, exiting...\n");
exit(-1);
}
paths = (char **) malloc(currSize * sizeof(char *));
if (paths == NULL)
{
fprintf(stderr, "Malloc error allocating memory for list of file hard links, exiting...\n");
exit(-1);
}
}
if (numLinks > 0)
{
left_pos = 0;
right_pos = numLinks + 1;
while (hardLinks[curr_pos-1] != fileInfo->st_ino)
{
curr_pos = (right_pos - left_pos) / 2;
if (curr_pos == 0) break;
curr_pos += left_pos;
if (hardLinks[curr_pos-1] > fileInfo->st_ino)
right_pos = curr_pos;
else if (hardLinks[curr_pos-1] < fileInfo->st_ino)
left_pos = curr_pos;
}
if (curr_pos != 0 && hardLinks[curr_pos-1] == fileInfo->st_ino)
{
if (strcmp(filepath, paths[curr_pos-1]) != 0 || strlen(filepath) != strlen(paths[curr_pos-1]))
{
if (folderinfo->print_info > 1)
printf("%s: skipping, hard link to this %s exists at %s\n", filepath, (fileInfo->st_mode & S_IFDIR) ? "folder" : "file", paths[curr_pos-1]);
return TRUE;
}
else
return FALSE;
}
}
if (currSize < numLinks + 1)
{
currSize *= 2;
hardLinks = realloc(hardLinks, currSize * sizeof(ino_t));
if (hardLinks == NULL)
{
fprintf(stderr, "Malloc error allocating memory for list of file hard links, exiting...\n");
exit(-1);
}
paths = realloc(paths, currSize * sizeof(char *));
if (paths == NULL)
{
fprintf(stderr, "Malloc error allocating memory for list of file hard links, exiting...\n");
exit(-1);
}
}
if ((numLinks != 0) && ((numLinks - 1) >= left_pos))
{
memmove(&hardLinks[left_pos+1], &hardLinks[left_pos], (numLinks - left_pos) * sizeof(ino_t));
if (paths != NULL)
memmove(&paths[left_pos+1], &paths[left_pos], (numLinks - left_pos) * sizeof(char *));
}
hardLinks[left_pos] = fileInfo->st_ino;
list_item = (char *) malloc(strlen(filepath) + 1);
strcpy(list_item, filepath);
paths[left_pos] = list_item;
numLinks++;
}
else if (fileInfo == NULL && hardLinks != NULL)
{
free(hardLinks);
hardLinks = NULL;
currSize = 0;
numLinks = 0;
if (paths != NULL)
{
for (curr_pos = 0; curr_pos < numLinks; curr_pos++)
free(paths[curr_pos]);
free(paths);
}
}
return FALSE;
}
void printFileInfo(const char *filepath, struct stat *fileinfo, bool appliedcomp)
{
char *xattrnames, *curr_attr;
ssize_t xattrnamesize, xattrssize = 0, xattrsize, RFsize = 0, compattrsize = 0;
long long int filesize, filesize_rounded;
int numxattrs = 0, numhiddenattr = 0;
bool hasRF = FALSE;
printf("%s:\n", filepath);
xattrnamesize = listxattr(filepath, NULL, 0, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW);
if (xattrnamesize > 0)
{
xattrnames = (char *) malloc(xattrnamesize);
if (xattrnames == NULL)
{
fprintf(stderr, "malloc error, unable to get file information\n");
return;
}
if ((xattrnamesize = listxattr(filepath, xattrnames, xattrnamesize, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW)) <= 0)
{
fprintf(stderr, "listxattr: %s\n", strerror(errno));
free(xattrnames);
return;
}
for (curr_attr = xattrnames; curr_attr < xattrnames + xattrnamesize; curr_attr += strlen(curr_attr) + 1)
{
xattrsize = getxattr(filepath, curr_attr, NULL, 0, 0, XATTR_SHOWCOMPRESSION | XATTR_NOFOLLOW);
if (xattrsize < 0)
{
fprintf(stderr, "getxattr: %s\n", strerror(errno));
free(xattrnames);
return;
}
numxattrs++;
if (strcmp(curr_attr, "com.apple.ResourceFork") == 0 && strlen(curr_attr) == 22)
{
RFsize += xattrsize;
hasRF = TRUE;
numhiddenattr++;
}
else if (strcmp(curr_attr, "com.apple.decmpfs") == 0 && strlen(curr_attr) == 17)
{
compattrsize += xattrsize;
numhiddenattr++;
}
else
xattrssize += xattrsize;
}
free(xattrnames);
}
if ((fileinfo->st_flags & UF_COMPRESSED) == 0)
{
if (appliedcomp)
printf("Unable to compress file.\n");
else
printf("File is not HFS+ compressed.\n");
if (hasRF)
{
printf("File data fork size: %lld bytes\n", fileinfo->st_size);
printf("File resource fork size: %ld bytes\n", RFsize);
filesize_rounded = filesize = fileinfo->st_size;
filesize_rounded += (filesize_rounded % fileinfo->st_blksize) ? fileinfo->st_blksize - (filesize_rounded % fileinfo->st_blksize) : 0;
filesize += RFsize;
filesize_rounded += RFsize;
filesize_rounded += (filesize_rounded % fileinfo->st_blksize) ? fileinfo->st_blksize - (filesize_rounded % fileinfo->st_blksize) : 0;
printf("File size (data fork + resource fork; reported size by Mac OS X Finder): %s\n", getSizeStr(filesize, filesize_rounded));
}
else
{
filesize_rounded = filesize = fileinfo->st_size;
filesize_rounded += (filesize % fileinfo->st_blksize) ? fileinfo->st_blksize - (filesize % fileinfo->st_blksize) : 0;
printf("File data fork size (reported size by Mac OS X Finder): %s\n", getSizeStr(filesize, filesize_rounded));
}
printf("Number of extended attributes: %d\n", numxattrs - numhiddenattr);
printf("Total size of extended attribute data: %ld bytes\n", xattrssize);