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// file : tests/path-entry/driver.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#ifndef __cpp_lib_modules_ts
#include <string>
#include <iostream>
#include <stdexcept> // invalid_argument
#include <system_error>
#endif
// Other includes.
#ifdef __cpp_modules_ts
#ifdef __cpp_lib_modules_ts
import std.core;
import std.io;
#endif
import butl.path;
import butl.path-io;
import butl.utility; // operator<<(ostream, exception)
import butl.optional;
import butl.timestamp;
import butl.filesystem;
#else
#include <libbutl/path.mxx>
#include <libbutl/path-io.mxx>
#include <libbutl/utility.mxx>
#include <libbutl/optional.mxx>
#include <libbutl/timestamp.mxx>
#include <libbutl/filesystem.mxx>
#endif
#undef NDEBUG
#include <cassert>
using namespace std;
using namespace butl;
// Usage: argv[0] [-l] [-t] [-p <permissions>] [-m <time>] [-a <time>] <path>
//
// If path entry exists then optionally modify its meta-information and print
// its type, size (meaningful for the regular file only), target path if the
// specified entry is a symlink and its path otherwise, permissions,
// modification and access times to stdout, one value per line, and exit with
// the zero code. Otherwise exit with the one code. Don't follow symlink by
// default. On failure print the error description to stderr and exit with the
// two code.
//
// -l
// Follow symlinks.
//
// -t
// Assume the path is a file and touch it. Implies -l.
//
// -p <permissions>
// Set path permissions specified in the chmod utility octal form. Implies
// -l.
//
// -m <time>
// Set path modification time specified in the "%Y-%m-%d %H:%M:%S%[.N]"
// format. Implies -l.
//
// -a <time>
// As -m but set the access time.
//
int
main (int argc, const char* argv[])
{
string stage;
try
{
using butl::optional;
bool follow_symlinks (false);
optional<permissions> perms;
optional<timestamp> mtime;
optional<timestamp> atime;
bool touch (false);
auto time = [] (const char* v)
{
return from_string (v, "%Y-%m-%d %H:%M:%S%[.N]", true /* local */);
};
int i (1);
for (; i != argc; ++i)
{
string v (argv[i]);
if (v == "-l")
follow_symlinks = true;
else if (v == "-t")
{
touch = true;
follow_symlinks = true;
}
else if (v == "-p")
{
assert (++i != argc);
v = argv[i];
size_t n;
perms = static_cast<permissions> (stoull (v, &n, 8));
assert (n == v.size ());
follow_symlinks = true;
}
else if (v == "-m")
{
assert (++i != argc);
mtime = time (argv[i]);
follow_symlinks = true;
}
else if (v == "-a")
{
assert (++i != argc);
atime = time (argv[i]);
follow_symlinks = true;
}
else
break;
}
assert (i == argc - 1);
path p (argv[i]);
if (touch)
{
stage = "touch";
touch_file (p);
}
stage = "stat entry";
pair<bool, entry_stat> es (path_entry (p, follow_symlinks));
if (!es.first)
return 1;
stage = "lstat entry";
pair<bool, entry_stat> ls (path_entry (p));
assert (ls.first);
// The entry is a directory with a symlink followed.
//
bool tdir;
if (follow_symlinks || es.second.type != entry_type::symlink)
tdir = (es.second.type == entry_type::directory);
else
{
stage = "stat target";
pair<bool, entry_stat> ts (path_entry (p, true /* follow_symlinks */));
if (!ts.first)
return 1;
tdir = (ts.second.type == entry_type::directory);
}
if (perms)
{
stage = "set permissions";
path_permissions (p, *perms);
}
if (mtime)
{
if (tdir)
{
stage = "set directory mtime";
dir_mtime (path_cast<dir_path> (p), *mtime);
}
else
{
stage = "set file mtime";
file_mtime (p, *mtime);
}
}
if (atime)
{
if (tdir)
{
stage = "set directory atime";
dir_atime (path_cast<dir_path> (p), *atime);
}
else
{
stage = "set file atime";
file_atime (p, *atime);
}
}
cout << "type: ";
switch (es.second.type)
{
case entry_type::unknown: cout << "unknown"; break;
case entry_type::regular: cout << "regular"; break;
case entry_type::directory: cout << "directory"; break;
case entry_type::symlink: cout << "symlink"; break;
case entry_type::other: cout << "other"; break;
}
cout << endl;
cout << "size: " << es.second.size << endl
<< "target: "
<< (ls.second.type == entry_type::symlink
? readsymlink (p)
: p) << endl;
stage = "get permissions";
cout << "permissions: "
<< oct << static_cast<size_t> (path_permissions (p)) << endl;
stage = tdir ? "get directory times" : "get file times";
entry_time et (tdir ? dir_time (path_cast<dir_path> (p)) : file_time (p));
cout << "mtime: " << et.modification << endl
<< "atime: " << et.access << endl;
return 0;
}
catch (const invalid_argument& e)
{
cerr << e << endl;
return 2;
}
catch (const system_error& e)
{
cerr << stage << " failed: " << e << endl;
return 2;
}
}
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