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/** |
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* This file is part of the CernVM File System. |
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*/ |
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#include "cvmfs_config.h" |
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#include "cmd_abort.h" |
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#include <unistd.h> |
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#include <cstdio> |
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#include <string> |
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#include "publish/cmd_util.h" |
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#include "publish/except.h" |
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#include "publish/repository.h" |
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#include "publish/settings.h" |
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#include "util/logging.h" |
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#include "util/pointer.h" |
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#include "util/posix.h" |
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#include "util/string.h" |
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#include "whitelist.h" |
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namespace { |
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std::string StripTrailingPath(const std::string& repo_and_path) { |
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if (!repo_and_path.empty()) { |
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std::vector<std::string> tokens = SplitString(repo_and_path, '/'); |
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return tokens[0]; |
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} |
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return ""; |
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} |
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} |
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namespace publish { |
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int CmdAbort::Main(const Options &options) { |
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SettingsBuilder builder; |
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std::string session_dir = Env::GetEnterSessionDir(); |
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if (!session_dir.empty()) { |
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builder.SetConfigPath(session_dir); |
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} |
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UniquePtr<SettingsPublisher> settings; |
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try { |
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// Legacy behaviour is that trailing paths after the repository name should |
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// be ignored, e.g. cvmfs_server abort repo.cern.ch/some/path is equivalent |
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// to cvmfs_server abort repo.cern.ch |
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std::string repository_ident = StripTrailingPath( |
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options.plain_args().empty() ? "" : options.plain_args()[0].value_str); |
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settings = builder.CreateSettingsPublisher( |
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repository_ident, true /* needs_managed */); |
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} catch (const EPublish &e) { |
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if ((e.failure() == EPublish::kFailRepositoryNotFound) || |
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(e.failure() == EPublish::kFailRepositoryType)) |
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{ |
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LogCvmfs(kLogCvmfs, kLogStderr | kLogSyslogErr, "CernVM-FS error: %s", |
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e.msg().c_str()); |
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return 1; |
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} |
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throw; |
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} |
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if (!SwitchCredentials(settings->owner_uid(), settings->owner_gid(), |
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false /* temporarily */)) |
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{ |
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throw EPublish("No write permission to repository", |
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EPublish::kFailPermission); |
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} |
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if (HasPrefix(GetCurrentWorkingDirectory() + "/", |
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settings->transaction().spool_area().union_mnt() + "/", |
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false /* ignore_case */)) |
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{ |
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LogCvmfs(kLogCvmfs, kLogStdout, |
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"Current working directory is in %s. Please release, " |
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"e.g. by 'cd $HOME'.", |
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settings->transaction().spool_area().union_mnt().c_str()); |
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return 1; |
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} |
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if (!options.Has("force")) { |
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LogCvmfs(kLogCvmfs, kLogStdout | kLogNoLinebreak, |
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"You are about to DISCARD ALL CHANGES OF THE CURRENT TRANSACTION " |
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"for %s! Are you sure (y/N)? ", settings->fqrn().c_str()); |
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char answer[] = {0, 0, 0}; |
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char *rv_charp = fgets(answer, 3, stdin); |
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if (rv_charp && (answer[0] != 'Y') && (answer[0] != 'y')) |
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return EINTR; |
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} else { |
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// We may have an expired/invalid lease token in the spool area, in which |
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// case dropping the session fails but we still want to continue the |
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// local transaction abort. |
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settings->SetIgnoreInvalidLease(true); |
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} |
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std::vector<LsofEntry> lsof_entries = |
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Lsof(settings->transaction().spool_area().union_mnt()); |
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if (!lsof_entries.empty()) { |
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if (options.Has("force")) { |
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LogCvmfs(kLogCvmfs, kLogStdout, |
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"WARNING: Open file descriptors on %s (possible race!)" |
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"\nThe following lsof report might show the culprit:\n", |
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settings->transaction().spool_area().union_mnt().c_str()); |
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} else { |
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LogCvmfs(kLogCvmfs, kLogStdout, |
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"\nWARNING! There are open read-only file descriptors in %s\n" |
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" --> This is potentially harmful and might cause problems " |
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"later on.\n" |
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" We can anyway perform the requested operation, but this " |
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"will most likely\n" |
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" break other processes with open file descriptors on %s!\n" |
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"\n" |
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" The following lsof report might show the processes with " |
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"open file handles\n", |
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settings->transaction().spool_area().union_mnt().c_str(), |
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settings->transaction().spool_area().union_mnt().c_str()); |
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} |
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for (unsigned i = 0; i < lsof_entries.size(); ++i) { |
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std::string owner_name; |
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GetUserNameOf(lsof_entries[i].owner, &owner_name); |
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LogCvmfs(kLogCvmfs, kLogStdout, "%s %d %s %s", |
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lsof_entries[i].executable.c_str(), |
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lsof_entries[i].pid, |
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owner_name.c_str(), |
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lsof_entries[i].path.c_str()); |
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} |
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if (!options.Has("force")) { |
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LogCvmfs(kLogCvmfs, kLogStdout | kLogNoLinebreak, |
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"\n Do you want to proceed anyway? (y/N) "); |
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char answer[] = {0, 0, 0}; |
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char *rv_charp = fgets(answer, 3, stdin); |
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if (rv_charp && (answer[0] != 'Y') && (answer[0] != 'y')) |
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return EINTR; |
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} |
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} |
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UniquePtr<Publisher> publisher; |
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publisher = new Publisher(*settings); |
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LogCvmfs(kLogCvmfs, kLogSyslog, "(%s) aborting transaction", |
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settings->fqrn().c_str()); |
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int rvi = CallServerHook("abort_before_hook", settings->fqrn()); |
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if (rvi != 0) { |
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LogCvmfs(kLogCvmfs, kLogStderr | kLogSyslogErr, |
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"abort hook failed, not aborting"); |
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return rvi; |
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} |
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try { |
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publisher->Abort(); |
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} catch (const EPublish &e) { |
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if (e.failure() == EPublish::kFailTransactionState) { |
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LogCvmfs(kLogCvmfs, kLogStderr, "%s", e.msg().c_str()); |
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return EINVAL; |
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} |
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LogCvmfs(kLogCvmfs, kLogStderr | kLogSyslogErr, "%s", e.msg().c_str()); |
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return EIO; |
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} |
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rvi = CallServerHook("abort_after_hook", settings->fqrn()); |
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if (rvi != 0) { |
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LogCvmfs(kLogCvmfs, kLogStderr | kLogSyslogErr, |
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"post abort hook failed"); |
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return rvi; |
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} |
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if (settings->transaction().in_enter_session()) { |
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LogCvmfs(kLogCvmfs, kLogStdout, |
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"Discarding changes and closing current transaction..."); |
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SafeWriteToFile("abort", session_dir + "/shellaction.marker", 0600); |
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publisher->ExitShell(); |
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} |
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return 0; |
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} |
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} // namespace publish |
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