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* Reduce gratuitous cut & pasting.

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This commit is contained in:
Eelco Dolstra 2004-06-22 10:21:44 +00:00
parent c9fbd2dfd5
commit 84007a0958
1 changed files with 55 additions and 68 deletions
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123
src/libstore/normalise.cc
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@ -180,6 +180,47 @@ void Goal::amDone()
//////////////////////////////////////////////////////////////////////
/* Common initialisation performed in child processes. */
void commonChildInit(Pipe & logPipe)
{
/* Put the child in a separate process group so that it doesn't
receive terminal signals. */
if (setpgid(0, 0) == -1)
throw SysError(format("setting process group"));
/* Dup the write side of the logger pipe into stderr. */
if (dup2(logPipe.writeSide, STDERR_FILENO) == -1)
throw SysError("cannot pipe standard error into log file");
logPipe.readSide.close();
/* Dup stderr to stdin. */
if (dup2(STDERR_FILENO, STDOUT_FILENO) == -1)
throw SysError("cannot dup stderr into stdout");
/* Reroute stdin to /dev/null. */
int fdDevNull = open(pathNullDevice.c_str(), O_RDWR);
if (fdDevNull == -1)
throw SysError(format("cannot open `%1%'") % pathNullDevice);
if (dup2(fdDevNull, STDIN_FILENO) == -1)
throw SysError("cannot dup null device into stdin");
}
const char * * strings2CharPtrs(const Strings & ss)
{
const char * * arr = new const char * [ss.size() + 1];
const char * * p = arr;
for (Strings::const_iterator i = ss.begin(); i != ss.end(); ++i)
*p++ = i->c_str();
*p = 0;
return arr;
}
//////////////////////////////////////////////////////////////////////
@ -816,25 +857,16 @@ void NormalisationGoal::startBuilder()
initChild();
/* Fill in the arguments. */
Strings & args(expr.derivation.args);
const char * argArr[args.size() + 2];
const char * * p = argArr;
string progName = baseNameOf(expr.derivation.builder);
*p++ = progName.c_str();
for (Strings::const_iterator i = args.begin();
i != args.end(); i++)
*p++ = i->c_str();
*p = 0;
Strings args(expr.derivation.args);
args.push_front(baseNameOf(expr.derivation.builder));
const char * * argArr = strings2CharPtrs(args);
/* Fill in the environment. */
Strings envStrs;
const char * envArr[env.size() + 1];
p = envArr;
for (Environment::const_iterator i = env.begin();
i != env.end(); i++)
*p++ = envStrs.insert(envStrs.end(),
i->first + "=" + i->second)->c_str();
*p = 0;
i != env.end(); ++i)
envStrs.push_back(i->first + "=" + i->second);
const char * * envArr = strings2CharPtrs(envStrs);
/* Execute the program. This should not return. */
execve(expr.derivation.builder.c_str(),
@ -987,30 +1019,11 @@ void NormalisationGoal::openLogFile()
void NormalisationGoal::initChild()
{
/* Put the child in a separate process group so that it doesn't
receive terminal signals. */
if (setpgid(0, 0) == -1)
throw SysError(format("setting process group"));
commonChildInit(logPipe);
if (chdir(tmpDir.c_str()) == -1)
throw SysError(format("changing into to `%1%'") % tmpDir);
/* Dup the write side of the logger pipe into stderr. */
if (dup2(logPipe.writeSide, STDERR_FILENO) == -1)
throw SysError("cannot pipe standard error into log file");
logPipe.readSide.close();
/* Dup stderr to stdin. */
if (dup2(STDERR_FILENO, STDOUT_FILENO) == -1)
throw SysError("cannot dup stderr into stdout");
/* Reroute stdin to /dev/null. */
int fdDevNull = open(pathNullDevice.c_str(), O_RDWR);
if (fdDevNull == -1)
throw SysError(format("cannot open `%1%'") % pathNullDevice);
if (dup2(fdDevNull, STDIN_FILENO) == -1)
throw SysError("cannot dup null device into stdin");
/* When running a hook, dup the communication pipes. */
bool inHook = fromHook.writeSide.isOpen();
if (inHook) {
@ -1311,39 +1324,13 @@ void SubstitutionGoal::tryToRun()
/* !!! close other handles */
/* !!! this is cut & paste - fix */
commonChildInit(logPipe);
/* Put the child in a separate process group so that it
doesn't receive terminal signals. */
if (setpgid(0, 0) == -1)
throw SysError(format("setting process group"));
/* Dup the write side of the logger pipe into stderr. */
if (dup2(logPipe.writeSide, STDERR_FILENO) == -1)
throw SysError("cannot pipe standard error into log file");
logPipe.readSide.close();
/* Dup stderr to stdin. */
if (dup2(STDERR_FILENO, STDOUT_FILENO) == -1)
throw SysError("cannot dup stderr into stdout");
/* Reroute stdin to /dev/null. */
int fdDevNull = open(pathNullDevice.c_str(), O_RDWR);
if (fdDevNull == -1)
throw SysError(format("cannot open `%1%'") % pathNullDevice);
if (dup2(fdDevNull, STDIN_FILENO) == -1)
throw SysError("cannot dup null device into stdin");
/* Fill in the arguments. !!! cut & paste */
const char * argArr[sub.args.size() + 3];
const char * * p = argArr;
string progName = baseNameOf(program);
*p++ = progName.c_str();
*p++ = storePath.c_str();
for (Strings::const_iterator i = sub.args.begin();
i != sub.args.end(); i++)
*p++ = i->c_str();
*p = 0;
/* Fill in the arguments. */
Strings args(sub.args);
args.push_front(storePath);
args.push_front(baseNameOf(program));
const char * * argArr = strings2CharPtrs(args);
execv(program.c_str(), (char * *) argArr);