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pathut.cpp    130 lines (102 with data), 2.7 kB

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#ifndef lint
static char rcsid[] = "@(#$Id: pathut.cpp,v 1.5 2005-11-24 07:16:16 dockes Exp $ (C) 2004 J.F.Dockes";
#endif
#ifndef TEST_PATHUT
#include <unistd.h>
#include <pwd.h>
#include <iostream>
#include "pathut.h"
#ifndef NO_NAMESPACES
using std::string;
#endif /* NO_NAMESPACES */
string path_getfather(const string &s) {
string father = s;
// ??
if (father.empty())
return "./";
if (father[father.length() - 1] == '/') {
// Input ends with /. Strip it, handle special case for root
if (father.length() == 1)
return father;
father.erase(father.length()-1);
}
string::size_type slp = father.rfind('/');
if (slp == string::npos)
return "./";
father.erase(slp);
path_catslash(father);
return father;
}
string path_getsimple(const string &s) {
string simple = s;
if (simple.empty())
return simple;
string::size_type slp = simple.rfind('/');
if (slp == string::npos)
return simple;
simple.erase(0, slp+1);
return simple;
}
string path_home()
{
uid_t uid = getuid();
struct passwd *entry = getpwuid(uid);
if (entry == 0) {
const char *cp = getenv("HOME");
if (cp)
return cp;
else
return "/";
}
string homedir = entry->pw_dir;
path_catslash(homedir);
return homedir;
}
extern string path_tildexpand(const string &s)
{
if (s.empty() || s[0] != '~')
return s;
string o = s;
if (s.length() == 1) {
o.replace(0, 1, path_home());
} else if (s[1] == '/') {
o.replace(0, 2, path_home());
} else {
string::size_type pos = s.find('/');
int l = (pos == string::npos) ? s.length() - 1 : pos - 1;
struct passwd *entry = getpwnam(s.substr(1, l).c_str());
if (entry)
o.replace(0, l+1, entry->pw_dir);
}
return o;
}
#else // TEST_PATHUT
#include <iostream>
using namespace std;
#include "pathut.h"
const char *tstvec[] = {"", "/", "/dir", "/dir/", "/dir1/dir2",
"/dir1/dir2",
"./dir", "./dir1/", "dir", "../dir", "/dir/toto.c",
"/dir/.c",
};
const string ttvec[] = {"/dir", "", "~", "~/sub", "~root", "~root/sub",
"~nosuch", "~nosuch/sub"};
int nttvec = sizeof(ttvec) / sizeof(string);
int main(int argc, const char **argv)
{
#if 0
for (int i = 0;i < sizeof(tstvec) / sizeof(char *); i++) {
cout << tstvec[i] << " FATHER " << path_getfather(tstvec[i]) << endl;
}
for (int i = 0;i < sizeof(tstvec) / sizeof(char *); i++) {
cout << tstvec[i] << " SIMPLE " << path_getsimple(tstvec[i]) << endl;
}
#endif
string s;
for (int i = 0; i < nttvec; i++) {
cout << "tildexp: '" << ttvec[i] << "' -> '" <<
path_tildexpand(ttvec[i]) << "'" << endl;
}
return 0;
}
#endif // TEST_PATHUT