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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;
SysError::SysError(string msg)
{
char * sysMsg = strerror(errno);
err = msg + ": " + sysMsg;
}
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;
/* !!! canonicalise */
char resolved[PATH_MAX];
if (!realpath(path.c_str(), resolved))
throw SysError("cannot canonicalise path " + path);
path = resolved;
}
return path;
}
string dirOf(string path)
{
unsigned int pos = path.rfind('/');
if (pos == string::npos) throw Error("invalid file name: " + path);
return string(path, 0, pos);
}
string baseNameOf(string path)
{
unsigned int pos = path.rfind('/');
if (pos == string::npos) throw Error("invalid file name: " + path);
return string(path, pos + 1);
}
void deletePath(string path)
{
struct stat st;
if (lstat(path.c_str(), &st))
throw SysError("getting attributes of path " + 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("cannot unlink " + path);
}
void debug(string s)
{
cerr << "debug: " << s << endl;
}
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