diff options
Diffstat (limited to 'src/nix.cc')
| -rw-r--r-- | src/nix.cc | 109 |
1 files changed, 67 insertions, 42 deletions
diff --git a/src/nix.cc b/src/nix.cc index 667f452aa16a..7d6b3c97a93c 100644 --- a/src/nix.cc +++ b/src/nix.cc @@ -29,6 +29,7 @@ static string dbNetSources = "netsources"; static string nixSourcesDir; +static string nixLogDir; static string nixDB; @@ -228,6 +229,13 @@ void installPkg(string hash) if (mkdir(path.c_str(), 0777)) throw Error("unable to create directory " + path); + /* Create a log file. */ + string logFileName = nixLogDir + "/" + id + "-" + hash + ".log"; + /* !!! auto-pclose on exit */ + FILE * logFile = popen(("tee " + logFileName).c_str(), "w"); /* !!! escaping */ + if (!logFile) + throw Error("unable to create log file " + logFileName); + try { /* Fork a child to build the package. */ @@ -237,62 +245,78 @@ void installPkg(string hash) case -1: throw Error("unable to fork"); - case 0: { /* child */ - - /* Go to the build directory. */ - if (chdir(path.c_str())) { - cerr << "unable to chdir to package directory\n"; - _exit(1); - } + case 0: - /* Try to use a prebuilt. */ - string prebuiltHash, prebuiltFile; - if (queryDB(nixDB, dbPrebuilts, hash, prebuiltHash)) { + try { /* child */ - try { - prebuiltFile = getFile(prebuiltHash); - } catch (Error e) { - cerr << "cannot obtain prebuilt (ignoring): " << e.what() << endl; - goto build; + /* Go to the build directory. */ + if (chdir(path.c_str())) { + cerr << "unable to chdir to package directory\n"; + _exit(1); } - - cerr << "substituting prebuilt " << prebuiltFile << endl; - - int res = system(("tar xfj " + prebuiltFile + " 1>&2").c_str()); // !!! escaping - if (WEXITSTATUS(res) != 0) - /* This is a fatal error, because path may now - have clobbered. */ - throw Error("cannot unpack " + prebuiltFile); - _exit(0); - } + /* Try to use a prebuilt. */ + string prebuiltHash, prebuiltFile; + if (queryDB(nixDB, dbPrebuilts, hash, prebuiltHash)) { -build: + try { + prebuiltFile = getFile(prebuiltHash); + } catch (Error e) { + cerr << "cannot obtain prebuilt (ignoring): " << e.what() << endl; + goto build; + } + + cerr << "substituting prebuilt " << prebuiltFile << endl; - /* Fill in the environment. We don't bother freeing the - strings, since we'll exec or die soon anyway. */ - const char * env2[env.size() + 1]; - int i = 0; - for (Environment::iterator it = env.begin(); - it != env.end(); it++, i++) - env2[i] = (new string(it->first + "=" + it->second))->c_str(); - env2[i] = 0; + int res = system(("tar xfj " + prebuiltFile + " 1>&2").c_str()); // !!! escaping + if (WEXITSTATUS(res) != 0) + /* This is a fatal error, because path may now + have clobbered. */ + throw Error("cannot unpack " + prebuiltFile); - /* Dup stderr to stdin. */ - dup2(STDERR_FILENO, STDOUT_FILENO); + _exit(0); + } - /* Execute the builder. This should not return. */ - execle(builder.c_str(), builder.c_str(), 0, env2); + build: + + /* Fill in the environment. We don't bother freeing + the strings, since we'll exec or die soon + anyway. */ + const char * env2[env.size() + 1]; + int i = 0; + for (Environment::iterator it = env.begin(); + it != env.end(); it++, i++) + env2[i] = (new string(it->first + "=" + it->second))->c_str(); + env2[i] = 0; + + /* Dup the log handle into stderr. */ + if (dup2(fileno(logFile), STDERR_FILENO) == -1) + throw Error("cannot pipe standard error into log file: " + string(strerror(errno))); + + /* Dup stderr to stdin. */ + if (dup2(STDERR_FILENO, STDOUT_FILENO) == -1) + throw Error("cannot dup stderr into stdout"); - cerr << strerror(errno) << endl; + /* Execute the builder. This should not return. */ + execle(builder.c_str(), builder.c_str(), 0, env2); - cerr << "unable to execute builder\n"; - _exit(1); } + throw Error("unable to execute builder: " + + string(strerror(errno))); + + } catch (exception & e) { + cerr << "build error: " << e.what() << endl; + _exit(1); + } } /* parent */ + /* Close the logging pipe. Note that this should not cause + the logger to exit until builder exits (because the latter + has an open file handle to the former). */ + pclose(logFile); + /* Wait for the child to finish. */ int status; if (waitpid(pid, &status, 0) != pid) @@ -305,7 +329,7 @@ build: int res = system(("chmod -R -w " + path).c_str()); // !!! escaping if (WEXITSTATUS(res) != 0) throw Error("cannot remove write permission from " + path); - + } catch (exception &) { system(("rm -rf " + path).c_str()); throw; @@ -690,6 +714,7 @@ void run(Strings::iterator argCur, Strings::iterator argEnd) if (homeDir) nixHomeDir = homeDir; nixSourcesDir = nixHomeDir + "/var/nix/sources"; + nixLogDir = nixHomeDir + "/var/log/nix"; nixDB = nixHomeDir + "/var/nix/pkginfo.db"; /* Parse the global flags. */ |