| Directory: | cvmfs/ |
|---|---|
| File: | cvmfs/network/sink_file.cc |
| Date: | 2024-04-28 02:33:07 |
| Exec | Total | Coverage | |
|---|---|---|---|
| Lines: | 15 | 26 | 57.7% |
| Branches: | 8 | 26 | 30.8% |
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /** | ||
| 2 | * This file is part of the CernVM File System. | ||
| 3 | */ | ||
| 4 | |||
| 5 | #include <cerrno> | ||
| 6 | #include <cstdio> | ||
| 7 | #include <string> | ||
| 8 | |||
| 9 | #include "sink_file.h" | ||
| 10 | |||
| 11 | namespace cvmfs { | ||
| 12 | |||
| 13 | /** | ||
| 14 | * Appends data to the sink | ||
| 15 | * | ||
| 16 | * @returns on success: number of bytes written | ||
| 17 | * on failure: -errno. | ||
| 18 | */ | ||
| 19 | 135 | int64_t FileSink::Write(const void *buf, uint64_t sz) { | |
| 20 | 135 | size_t ret = fwrite(buf, 1ul, sz, file_); | |
| 21 | |||
| 22 |
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135 | if (ferror(file_) != 0) { |
| 23 | // ferror does not tell us what exactly the error is | ||
| 24 | // and errno is also not set | ||
| 25 | // so just return generic I/O error flag | ||
| 26 | ✗ | return -EIO; | |
| 27 | } | ||
| 28 | |||
| 29 | 135 | return static_cast<int64_t>(ret); | |
| 30 | } | ||
| 31 | |||
| 32 | /** | ||
| 33 | * Truncate all written data and start over at position zero. | ||
| 34 | * | ||
| 35 | * @returns Success = 0 | ||
| 36 | * Failure = -1 | ||
| 37 | */ | ||
| 38 | 14 | int FileSink::Reset() { | |
| 39 |
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28 | return ((fflush(file_) == 0) && |
| 40 | 14 | (ftruncate(fileno(file_), 0) == 0) && | |
| 41 |
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28 | (freopen(NULL, "w", file_) == file_)) ? 0 : -errno; |
| 42 | } | ||
| 43 | |||
| 44 | /** | ||
| 45 | * Purges all resources leaving the sink in an invalid state. | ||
| 46 | * More aggressive version of Reset(). | ||
| 47 | * For some sinks and depending on owner status it might do | ||
| 48 | * the same as Reset(). | ||
| 49 | * | ||
| 50 | * @returns Success = 0 | ||
| 51 | * Failure = -errno | ||
| 52 | */ | ||
| 53 | 9 | int FileSink::Purge() { | |
| 54 |
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9 | if (is_owner_ && file_) { |
| 55 | 2 | int ret = fclose(file_); | |
| 56 | 2 | file_ = NULL; | |
| 57 |
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2 | if (ret != 0) { |
| 58 | ✗ | return -errno; | |
| 59 | } | ||
| 60 | |||
| 61 | 2 | return 0; | |
| 62 | } else { | ||
| 63 | 7 | return Reset(); | |
| 64 | } | ||
| 65 | } | ||
| 66 | |||
| 67 | /** | ||
| 68 | * Return a string representation describing the type of sink and its status | ||
| 69 | */ | ||
| 70 | ✗ | std::string FileSink::Describe() { | |
| 71 | ✗ | std::string result = "File sink with "; | |
| 72 | ✗ | result += IsValid() ? " valid file pointer" : " invalid file pointer"; | |
| 73 | ✗ | return result; | |
| 74 | } | ||
| 75 | ✗ | void FileSink::Adopt(FILE *file, bool is_owner) { | |
| 76 | ✗ | if (is_owner_ && file_) { | |
| 77 | ✗ | (void) fclose(file_); | |
| 78 | } | ||
| 79 | |||
| 80 | ✗ | is_owner_ = is_owner; | |
| 81 | ✗ | file_ = file; | |
| 82 | } | ||
| 83 | } // namespace cvmfs | ||
| 84 |