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runProgram backup

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This commit is contained in:
Wouter den Breejen 2007-07-06 15:12:20 +00:00
parent eb1f179eac
commit 4f483aad0f
16 changed files with 338 additions and 174 deletions
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92
src/libutil/util.cc
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@ -806,20 +806,78 @@ string runProgram(Path program, bool searchPath, const Strings & args)
} catch (std::exception & e) {
std::cerr << "error: " << e.what() << std::endl;
}
quickExit(1);
}
/* Parent. */
pipe.writeSide.close();
// Create a pipe.
Pipe pipe2;
pipe2.create();
string result = drainFD(pipe.readSide);
// Fork.
Pid pid2;
pid2 = fork();
switch (pid2) {
case -1:
throw SysError("unable to fork");
case 0: // child
try {
pipe2.readSide.close();
if (dup2(pipe2.writeSide, STDOUT_FILENO) == -1)
throw SysError("dupping from-hook write side");
dup2(pipe.readSide, STDIN_FILENO);
Path s = "grep";
Strings args2;
args2.push_back("Revision");
std::vector<const char *> cargs; // careful with c_str()!
cargs.push_back(s.c_str());
for (Strings::const_iterator i = args2.begin(); i != args2.end(); ++i)
cargs.push_back(i->c_str());
cargs.push_back(0);
if (searchPath)
execvp(s.c_str(), (char * *) &cargs[0]);
else
execv(s.c_str(), (char * *) &cargs[0]);
throw SysError(format("executing `%1%'") % s);
} catch (std::exception & e) {
std::cerr << "error: " << e.what() << std::endl;
}
quickExit(1);
}
/* Parent. */
pipe2.writeSide.close();
string result = drainFD(pipe2.readSide);
/* Wait for the child to finish. */
int status = pid.wait(true);
if (!statusOk(status))
throw Error(format("program `%1%' %2%")
% program % statusToString(status));
/* wait for second ........... */
int status2 = pid2.wait(true);
if (!statusOk(status2))
throw Error(format("program `%1%' %2%")
% program % statusToString(status));
return result;
}
@ -1149,44 +1207,21 @@ string getCallingUserName()
//merges two PathSets into one, removing doubles (union)
PathSet pathSets_union(const PathSet & paths1, const PathSet & paths2)
{
/*
for (PathSet::iterator i = paths1.begin(); i != paths1.end(); ++i)
printMsg(lvlError, format("paths1: '%1%'") % (*i));
for (PathSet::iterator i = paths2.begin(); i != paths2.end(); ++i)
printMsg(lvlError, format("paths2: '%1%'") % (*i));
*/
vector<Path> vector1(paths1.begin(), paths1.end());
vector<Path> vector2(paths2.begin(), paths2.end());
vector<Path> setResult;
set_union(vector1.begin(), vector1.end(),vector2.begin(), vector2.end(), back_inserter(setResult));
//Also available:
//set_symmetric_difference
//set_intersection
set_union(vector1.begin(), vector1.end(),vector2.begin(), vector2.end(), back_inserter(setResult)); //Also available: set_symmetric_difference and set_intersection
PathSet diff;
for(int i=0; i<setResult.size(); i++)
diff.insert(setResult[i]);
/*
for (PathSet::iterator i = diff.begin(); i != diff.end(); ++i)
printMsg(lvlError, format("diff: '%1%'") % (*i));
*/
return diff;
}
void pathSets_difference(const PathSet & oldpaths, const PathSet & newpaths, PathSet & addedpaths, PathSet & removedpaths)
{
/*
for (PathSet::iterator i = oldpaths.begin(); i != oldpaths.end(); ++i)
printMsg(lvlError, format("oldpaths: '%1%'") % (*i));
for (PathSet::iterator i = newpaths.begin(); i != newpaths.end(); ++i)
printMsg(lvlError, format("newpaths: '%1%'") % (*i));
*/
for (PathSet::iterator i = oldpaths.begin(); i != oldpaths.end(); ++i){
bool exists = false;
for (PathSet::iterator j = newpaths.begin(); j != newpaths.end(); ++j){
@ -1210,13 +1245,6 @@ void pathSets_difference(const PathSet & oldpaths, const PathSet & newpaths, Pat
if(!exists)
addedpaths.insert(*i);
}
/*
for (PathSet::iterator i = addedpaths.begin(); i != addedpaths.end(); ++i)
printMsg(lvlError, format("addedpaths: '%1%'") % (*i));
for (PathSet::iterator i = removedpaths.begin(); i != removedpaths.end(); ++i)
printMsg(lvlError, format("removedpaths: '%1%'") % (*i));
*/
}