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* ustar: Add function to write headerPatrick McDermott2023-04-291-0/+56
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* opk: Absorb seek list management from ustarPatrick McDermott2023-04-281-117/+0
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* ustar: Don't read data after finding named headerPatrick McDermott2023-04-281-16/+7
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* ustar: Ensure listed linkname is NUL-terminatedPatrick McDermott2023-04-251-5/+5
| | | | Also simplify uname and gname copying.
* ustar: Eliminate static variablesPatrick McDermott2023-04-251-50/+53
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* ustar: Add a couple small commentsPatrick McDermott2023-04-191-0/+4
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* ustar: Make seek names struct opaquePatrick McDermott2023-04-191-10/+38
| | | | Simplify main() a little and fix memory leak on success.
* ustar: Shorten macro namePatrick McDermott2023-04-181-1/+1
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* ustar: Use linked list instead of varargs in seekPatrick McDermott2023-04-181-13/+61
| | | | Also indicate when all sought member files are found.
* main, ustar: Add commentsPatrick McDermott2023-04-181-0/+18
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* ustar: Use char typePatrick McDermott2023-04-181-32/+32
| | | | | | POSIX requires header characters to be encoded in ISO/IEC 646, a 7-bit code, so the extra bit in (unsigned char) is unnecessary. So fix a bunch of warnings and get rid of casts.
* ustar: Fix a couple warningsPatrick McDermott2023-04-181-2/+2
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* ustar: Make size unsignedPatrick McDermott2023-04-181-1/+1
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* ustar, main: Dynamically allocate member structsPatrick McDermott2023-04-181-17/+26
| | | | | TODO: Save max strlen()s in first loop and printf() and free() in second loop.
* ustar, main: Show mode and mtimePatrick McDermott2023-04-171-0/+11
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* ustar, main: Show type, uname, and gnamePatrick McDermott2023-04-171-0/+28
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* ustar: Verify typeflagPatrick McDermott2023-04-171-4/+20
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* Revert "ustar: Verify full magic field"Patrick McDermott2023-04-171-1/+1
| | | | | | | This reverts commit 1203f44aa85a88cfdc3008e7f14818c85bfe46c3. POSIX requires "ustar\0" but BusyBox tar creates "ustar ". Again, standard? What standard?
* ustar: Verify full magic fieldPatrick McDermott2023-04-171-1/+1
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* Revert "ustar: Verify version"Patrick McDermott2023-04-171-4/+0
| | | | | | | This reverts commit 8858721eceff2d22099ed42bee049b35a0fc712c. POSIX requires "00" but BusyBox tar creates " \0". Apparently standards are irrelevant.
* ustar: Verify versionPatrick McDermott2023-04-171-0/+4
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* ustar: Verify header checksumsPatrick McDermott2023-04-171-3/+25
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* ustar, main: Show size of member filesPatrick McDermott2023-04-171-1/+2
| | | | Also fix integer type (maximum file size is 8^12-1 = 68719476735).
* ustar: Search for multiple member namesPatrick McDermott2023-04-171-3/+12
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* ustar: Don't read sought filePatrick McDermott2023-04-171-4/+4
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* ustar: Fix seekingPatrick McDermott2023-04-151-10/+6
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* ustar: Fix read bufferPatrick McDermott2023-04-151-19/+22
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* Eliminate magic numbersPatrick McDermott2023-04-141-12/+14
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* gzip, ustar: Add *_free() functionsPatrick McDermott2023-04-141-1/+6
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* ustar: RewritePatrick McDermott2023-04-141-36/+111
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* ustar: Improve end detectionPatrick McDermott2023-04-131-2/+7
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* ustar: Size field (and all other ints) is octalPatrick McDermott2023-04-131-1/+1
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* ustar: Verify magicPatrick McDermott2023-04-131-0/+5
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* ustar: ImplementPatrick McDermott2023-04-131-0/+109
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