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#include <iostream>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include "util.hh"
string thisSystem = SYSTEM;
Error::Error(const format & f)
{
err = f.str();
}
SysError::SysError(const format & f)
: Error(format("%1%: %2%") % f.str() % strerror(errno))
{
}
string absPath(string path, string dir)
{
if (path[0] != '/') {
if (dir == "") {
char buf[PATH_MAX];
if (!getcwd(buf, sizeof(buf)))
throw SysError("cannot get cwd");
dir = buf;
}
path = dir + "/" + path;
}
return canonPath(path);
}
string canonPath(const string & path)
{
char resolved[PATH_MAX];
if (!realpath(path.c_str(), resolved))
throw SysError(format("cannot canonicalise path `%1%'") % path);
/* !!! check that this removes trailing slashes */
return resolved;
}
string dirOf(string path)
{
unsigned int pos = path.rfind('/');
if (pos == string::npos)
throw Error(format("invalid file name: %1%") % path);
return string(path, 0, pos);
}
string baseNameOf(string path)
{
unsigned int pos = path.rfind('/');
if (pos == string::npos)
throw Error(format("invalid file name %1% ") % path);
return string(path, pos + 1);
}
bool pathExists(const string & path)
{
int res;
struct stat st;
res = stat(path.c_str(), &st);
if (!res) return true;
if (errno != ENOENT)
throw SysError(format("getting status of %1%") % path);
return false;
}
void deletePath(string path)
{
struct stat st;
if (lstat(path.c_str(), &st))
throw SysError(format("getting attributes of path %1%") % path);
if (S_ISDIR(st.st_mode)) {
DIR * dir = opendir(path.c_str());
struct dirent * dirent;
while (errno = 0, dirent = readdir(dir)) {
string name = dirent->d_name;
if (name == "." || name == "..") continue;
deletePath(path + "/" + name);
}
closedir(dir); /* !!! close on exception */
}
if (remove(path.c_str()) == -1)
throw SysError(format("cannot unlink %1%") % path);
}
static int nestingLevel = 0;
Nest::Nest(bool nest)
{
this->nest = nest;
if (nest) nestingLevel++;
}
Nest::~Nest()
{
if (nest) nestingLevel--;
}
void msg(const format & f)
{
string spaces;
for (int i = 0; i < nestingLevel; i++)
spaces += " ";
cerr << format("%1%%2%\n") % spaces % f.str();
}
void debug(const format & f)
{
msg(format("debug: %1%") % f.str());
}
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