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| 1 | +/* |
| 2 | + * Copyright (c) 2004-present, Facebook, Inc. |
| 3 | + * All rights reserved. |
| 4 | + * |
| 5 | + * This source code is licensed under the BSD-style license found in the |
| 6 | + * LICENSE file in the root directory of this source tree. An additional grant |
| 7 | + * of patent rights can be found in the PATENTS file in the same directory. |
| 8 | + * |
| 9 | + */ |
| 10 | + |
| 11 | +#include "fboss/cli/fboss2/commands/config/history/CmdConfigHistory.h" |
| 12 | +#include <fcntl.h> |
| 13 | +#include <pwd.h> |
| 14 | +#include <sys/stat.h> |
| 15 | +#include <cstdint> |
| 16 | +#include <ctime> |
| 17 | +#include <filesystem> |
| 18 | +#include <iomanip> |
| 19 | +#include <sstream> |
| 20 | +#include <vector> |
| 21 | +#include "fboss/cli/fboss2/session/ConfigSession.h" |
| 22 | +#include "fboss/cli/fboss2/utils/Table.h" |
| 23 | + |
| 24 | +namespace fs = std::filesystem; |
| 25 | + |
| 26 | +namespace facebook::fboss { |
| 27 | + |
| 28 | +namespace { |
| 29 | + |
| 30 | +struct RevisionInfo { |
| 31 | + int revisionNumber; |
| 32 | + std::string owner; |
| 33 | + int64_t commitTimeNsec; // Commit time in nanoseconds since epoch |
| 34 | + std::string filePath; |
| 35 | +}; |
| 36 | + |
| 37 | +// Get the username from a UID |
| 38 | +std::string getUsername(uid_t uid) { |
| 39 | + struct passwd* pw = getpwuid(uid); |
| 40 | + if (pw) { |
| 41 | + return std::string(pw->pw_name); |
| 42 | + } |
| 43 | + // If we can't resolve the username, return the UID as a string |
| 44 | + return "UID:" + std::to_string(uid); |
| 45 | +} |
| 46 | + |
| 47 | +// Format time as a human-readable string with milliseconds |
| 48 | +std::string formatTime(int64_t timeNsec) { |
| 49 | + // Convert nanoseconds to seconds and remaining nanoseconds |
| 50 | + std::time_t timeSec = timeNsec / 1000000000; |
| 51 | + long nsec = timeNsec % 1000000000; |
| 52 | + |
| 53 | + char buffer[100]; |
| 54 | + tm timeinfo{}; |
| 55 | + localtime_r(&timeSec, &timeinfo); |
| 56 | + std::strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", &timeinfo); |
| 57 | + |
| 58 | + // Add milliseconds |
| 59 | + long milliseconds = nsec / 1000000; |
| 60 | + std::ostringstream oss; |
| 61 | + oss << buffer << '.' << std::setfill('0') << std::setw(3) << milliseconds; |
| 62 | + return oss.str(); |
| 63 | +} |
| 64 | + |
| 65 | +// Collect all revision files from the CLI config directory |
| 66 | +std::vector<RevisionInfo> collectRevisions(const std::string& cliConfigDir) { |
| 67 | + std::vector<RevisionInfo> revisions; |
| 68 | + |
| 69 | + std::error_code ec; |
| 70 | + if (!fs::exists(cliConfigDir, ec) || !fs::is_directory(cliConfigDir, ec)) { |
| 71 | + // Directory doesn't exist or is not a directory |
| 72 | + return revisions; |
| 73 | + } |
| 74 | + |
| 75 | + for (const auto& entry : fs::directory_iterator(cliConfigDir, ec)) { |
| 76 | + if (ec) { |
| 77 | + continue; // Skip entries we can't read |
| 78 | + } |
| 79 | + |
| 80 | + if (!entry.is_regular_file(ec)) { |
| 81 | + continue; // Skip non-regular files |
| 82 | + } |
| 83 | + |
| 84 | + std::string filename = entry.path().filename().string(); |
| 85 | + int revNum = ConfigSession::extractRevisionNumber(filename); |
| 86 | + |
| 87 | + if (revNum < 0) { |
| 88 | + continue; // Skip files that don't match our pattern |
| 89 | + } |
| 90 | + |
| 91 | + // Get file metadata using statx to get birth time (creation time) |
| 92 | + struct statx stx; |
| 93 | + if (statx( |
| 94 | + AT_FDCWD, entry.path().c_str(), 0, STATX_BTIME | STATX_UID, &stx) != |
| 95 | + 0) { |
| 96 | + continue; // Skip if we can't get file stats |
| 97 | + } |
| 98 | + |
| 99 | + RevisionInfo info; |
| 100 | + info.revisionNumber = revNum; |
| 101 | + info.owner = getUsername(stx.stx_uid); |
| 102 | + // Use birth time (creation time) if available, otherwise fall back to mtime |
| 103 | + if (stx.stx_mask & STATX_BTIME) { |
| 104 | + info.commitTimeNsec = |
| 105 | + static_cast<int64_t>(stx.stx_btime.tv_sec) * 1000000000 + |
| 106 | + stx.stx_btime.tv_nsec; |
| 107 | + } else { |
| 108 | + info.commitTimeNsec = |
| 109 | + static_cast<int64_t>(stx.stx_mtime.tv_sec) * 1000000000 + |
| 110 | + stx.stx_mtime.tv_nsec; |
| 111 | + } |
| 112 | + info.filePath = entry.path().string(); |
| 113 | + |
| 114 | + revisions.push_back(info); |
| 115 | + } |
| 116 | + |
| 117 | + // Sort by revision number (ascending) |
| 118 | + std::sort( |
| 119 | + revisions.begin(), |
| 120 | + revisions.end(), |
| 121 | + [](const RevisionInfo& a, const RevisionInfo& b) { |
| 122 | + return a.revisionNumber < b.revisionNumber; |
| 123 | + }); |
| 124 | + |
| 125 | + return revisions; |
| 126 | +} |
| 127 | + |
| 128 | +} // namespace |
| 129 | + |
| 130 | +CmdConfigHistoryTraits::RetType CmdConfigHistory::queryClient( |
| 131 | + const HostInfo& hostInfo) { |
| 132 | + auto& session = ConfigSession::getInstance(); |
| 133 | + const std::string cliConfigDir = session.getCliConfigDir(); |
| 134 | + |
| 135 | + auto revisions = collectRevisions(cliConfigDir); |
| 136 | + |
| 137 | + if (revisions.empty()) { |
| 138 | + return "No config revisions found in " + cliConfigDir; |
| 139 | + } |
| 140 | + |
| 141 | + // Build the table |
| 142 | + utils::Table table; |
| 143 | + table.setHeader({"Revision", "Owner", "Commit Time"}); |
| 144 | + |
| 145 | + for (const auto& rev : revisions) { |
| 146 | + table.addRow( |
| 147 | + {"r" + std::to_string(rev.revisionNumber), |
| 148 | + rev.owner, |
| 149 | + formatTime(rev.commitTimeNsec)}); |
| 150 | + } |
| 151 | + |
| 152 | + // Convert table to string |
| 153 | + std::ostringstream oss; |
| 154 | + oss << table; |
| 155 | + return oss.str(); |
| 156 | +} |
| 157 | + |
| 158 | +void CmdConfigHistory::printOutput(const RetType& tableOutput) { |
| 159 | + std::cout << tableOutput << std::endl; |
| 160 | +} |
| 161 | + |
| 162 | +} // namespace facebook::fboss |
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