-//
-// pkgutils
-//
-// Copyright (c) 2000-2005 Per Liden
-// Copyright (c) 2006-2010 by CRUX team (http://crux.nu)
-//
-// This program is free software; you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation; either version 2 of the License, or
-// (at your option) any later version.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-// USA.
-//
-
-#include "pkgutil.h"
-#include <iostream>
-#include <fstream>
-#include <iterator>
-#include <algorithm>
-#include <cstdio>
-#include <cstring>
-#include <cerrno>
-#include <csignal>
-#include <ext/stdio_filebuf.h>
-#include <pwd.h>
-#include <grp.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <sys/file.h>
-#include <sys/param.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <libgen.h>
-#include <archive.h>
-#include <archive_entry.h>
-
-#define INIT_ARCHIVE(ar) \
- archive_read_support_filter_gzip((ar)); \
- archive_read_support_filter_bzip2((ar)); \
- archive_read_support_filter_xz((ar)); \
- archive_read_support_format_tar((ar))
-
-#define DEFAULT_BYTES_PER_BLOCK (20 * 512)
-
-using __gnu_cxx::stdio_filebuf;
-
-pkgutil::pkgutil(const string& name)
- : utilname(name)
-{
- // Ignore signals
- struct sigaction sa;
- memset(&sa, 0, sizeof(sa));
- sa.sa_handler = SIG_IGN;
- sigaction(SIGHUP, &sa, 0);
- sigaction(SIGINT, &sa, 0);
- sigaction(SIGQUIT, &sa, 0);
- sigaction(SIGTERM, &sa, 0);
-}
-
-void pkgutil::db_open(const string& path)
-{
- // Read database
- root = trim_filename(path + "/");
- const string filename = root + PKG_DB;
-
- int fd = open(filename.c_str(), O_RDONLY);
- if (fd == -1)
- throw runtime_error_with_errno("could not open " + filename);
-
- stdio_filebuf<char> filebuf(fd, ios::in, getpagesize());
- istream in(&filebuf);
- if (!in)
- throw runtime_error_with_errno("could not read " + filename);
-
- while (!in.eof()) {
- // Read record
- string name;
- pkginfo_t info;
- getline(in, name);
- getline(in, info.version);
- for (;;) {
- string file;
- getline(in, file);
-
- if (file.empty())
- break; // End of record
-
- info.files.insert(info.files.end(), file);
- }
- if (!info.files.empty())
- packages[name] = info;
- }
-
-#ifndef NDEBUG
- cerr << packages.size() << " packages found in database" << endl;
-#endif
-}
-
-void pkgutil::db_commit()
-{
- const string dbfilename = root + PKG_DB;
- const string dbfilename_new = dbfilename + ".incomplete_transaction";
- const string dbfilename_bak = dbfilename + ".backup";
-
- // Remove failed transaction (if it exists)
- if (unlink(dbfilename_new.c_str()) == -1 && errno != ENOENT)
- throw runtime_error_with_errno("could not remove " + dbfilename_new);
-
- // Write new database
- int fd_new = creat(dbfilename_new.c_str(), 0444);
- if (fd_new == -1)
- throw runtime_error_with_errno("could not create " + dbfilename_new);
-
- stdio_filebuf<char> filebuf_new(fd_new, ios::out, getpagesize());
- ostream db_new(&filebuf_new);
- for (packages_t::const_iterator i = packages.begin(); i != packages.end(); ++i) {
- if (!i->second.files.empty()) {
- db_new << i->first << "\n";
- db_new << i->second.version << "\n";
- copy(i->second.files.begin(), i->second.files.end(), ostream_iterator<string>(db_new, "\n"));
- db_new << "\n";
- }
- }
-
- db_new.flush();
-
- // Make sure the new database was successfully written
- if (!db_new)
- throw runtime_error("could not write " + dbfilename_new);
-
- // Synchronize file to disk
- if (fsync(fd_new) == -1)
- throw runtime_error_with_errno("could not synchronize " + dbfilename_new);
-
- // Relink database backup
- if (unlink(dbfilename_bak.c_str()) == -1 && errno != ENOENT)
- throw runtime_error_with_errno("could not remove " + dbfilename_bak);
- if (link(dbfilename.c_str(), dbfilename_bak.c_str()) == -1)
- throw runtime_error_with_errno("could not create " + dbfilename_bak);
-
- // Move new database into place
- if (rename(dbfilename_new.c_str(), dbfilename.c_str()) == -1)
- throw runtime_error_with_errno("could not rename " + dbfilename_new + " to " + dbfilename);
-
-#ifndef NDEBUG
- cerr << packages.size() << " packages written to database" << endl;
-#endif
-}
-
-void pkgutil::db_add_pkg(const string& name, const pkginfo_t& info)
-{
- packages[name] = info;
-}
-
-bool pkgutil::db_find_pkg(const string& name)
-{
- return (packages.find(name) != packages.end());
-}
-
-void pkgutil::db_rm_pkg(const string& name)
-{
- set<string> files = packages[name].files;
- packages.erase(name);
-
-#ifndef NDEBUG
- cerr << "Removing package phase 1 (all files in package):" << endl;
- copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n"));
- cerr << endl;
-#endif
-
- // Don't delete files that still have references
- for (packages_t::const_iterator i = packages.begin(); i != packages.end(); ++i)
- for (set<string>::const_iterator j = i->second.files.begin(); j != i->second.files.end(); ++j)
- files.erase(*j);
-
-#ifndef NDEBUG
- cerr << "Removing package phase 2 (files that still have references excluded):" << endl;
- copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n"));
- cerr << endl;
-#endif
-
- // Delete the files
- for (set<string>::const_reverse_iterator i = files.rbegin(); i != files.rend(); ++i) {
- const string filename = root + *i;
- if (file_exists(filename) && remove(filename.c_str()) == -1) {
- const char* msg = strerror(errno);
- cerr << utilname << ": could not remove " << filename << ": " << msg << endl;
- }
- }
-}
-
-void pkgutil::db_rm_pkg(const string& name, const set<string>& keep_list)
-{
- set<string> files = packages[name].files;
- packages.erase(name);
-
-#ifndef NDEBUG
- cerr << "Removing package phase 1 (all files in package):" << endl;
- copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n"));
- cerr << endl;
-#endif
-
- // Don't delete files found in the keep list
- for (set<string>::const_iterator i = keep_list.begin(); i != keep_list.end(); ++i)
- files.erase(*i);
-
-#ifndef NDEBUG
- cerr << "Removing package phase 2 (files that is in the keep list excluded):" << endl;
- copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n"));
- cerr << endl;
-#endif
-
- // Don't delete files that still have references
- for (packages_t::const_iterator i = packages.begin(); i != packages.end(); ++i)
- for (set<string>::const_iterator j = i->second.files.begin(); j != i->second.files.end(); ++j)
- files.erase(*j);
-
-#ifndef NDEBUG
- cerr << "Removing package phase 3 (files that still have references excluded):" << endl;
- copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n"));
- cerr << endl;
-#endif
-
- // Delete the files
- for (set<string>::const_reverse_iterator i = files.rbegin(); i != files.rend(); ++i) {
- const string filename = root + *i;
- if (file_exists(filename) && remove(filename.c_str()) == -1) {
- if (errno == ENOTEMPTY)
- continue;
- const char* msg = strerror(errno);
- cerr << utilname << ": could not remove " << filename << ": " << msg << endl;
- }
- }
-}
-
-void pkgutil::db_rm_files(set<string> files, const set<string>& keep_list)
-{
- // Remove all references
- for (packages_t::iterator i = packages.begin(); i != packages.end(); ++i)
- for (set<string>::const_iterator j = files.begin(); j != files.end(); ++j)
- i->second.files.erase(*j);
-
-#ifndef NDEBUG
- cerr << "Removing files:" << endl;
- copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n"));
- cerr << endl;
-#endif
-
- // Don't delete files found in the keep list
- for (set<string>::const_iterator i = keep_list.begin(); i != keep_list.end(); ++i)
- files.erase(*i);
-
- // Delete the files
- for (set<string>::const_reverse_iterator i = files.rbegin(); i != files.rend(); ++i) {
- const string filename = root + *i;
- if (file_exists(filename) && remove(filename.c_str()) == -1) {
- if (errno == ENOTEMPTY)
- continue;
- const char* msg = strerror(errno);
- cerr << utilname << ": could not remove " << filename << ": " << msg << endl;
- }
- }
-}
-
-set<string> pkgutil::db_find_conflicts(const string& name, const pkginfo_t& info)
-{
- set<string> files;
-
- // Find conflicting files in database
- for (packages_t::const_iterator i = packages.begin(); i != packages.end(); ++i) {
- if (i->first != name) {
- set_intersection(info.files.begin(), info.files.end(),
- i->second.files.begin(), i->second.files.end(),
- inserter(files, files.end()));
- }
- }
-
-#ifndef NDEBUG
- cerr << "Conflicts phase 1 (conflicts in database):" << endl;
- copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n"));
- cerr << endl;
-#endif
-
- // Find conflicting files in filesystem
- for (set<string>::iterator i = info.files.begin(); i != info.files.end(); ++i) {
- const string filename = root + *i;
- if (file_exists(filename) && files.find(*i) == files.end())
- files.insert(files.end(), *i);
- }
-
-#ifndef NDEBUG
- cerr << "Conflicts phase 2 (conflicts in filesystem added):" << endl;
- copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n"));
- cerr << endl;
-#endif
-
- // Exclude directories
- set<string> tmp = files;
- for (set<string>::const_iterator i = tmp.begin(); i != tmp.end(); ++i) {
- if ((*i)[i->length() - 1] == '/')
- files.erase(*i);
- }
-
-#ifndef NDEBUG
- cerr << "Conflicts phase 3 (directories excluded):" << endl;
- copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n"));
- cerr << endl;
-#endif
-
- // If this is an upgrade, remove files already owned by this package
- if (packages.find(name) != packages.end()) {
- for (set<string>::const_iterator i = packages[name].files.begin(); i != packages[name].files.end(); ++i)
- files.erase(*i);
-
-#ifndef NDEBUG
- cerr << "Conflicts phase 4 (files already owned by this package excluded):" << endl;
- copy(files.begin(), files.end(), ostream_iterator<string>(cerr, "\n"));
- cerr << endl;
-#endif
- }
-
- return files;
-}
-
-pair<string, pkgutil::pkginfo_t> pkgutil::pkg_open(const string& filename) const
-{
- pair<string, pkginfo_t> result;
- unsigned int i;
- struct archive* archive;
- struct archive_entry* entry;
-
- // Extract name and version from filename
- string basename(filename, filename.rfind('/') + 1);
- string name(basename, 0, basename.find(VERSION_DELIM));
- string version(basename, 0, basename.rfind(PKG_EXT));
- version.erase(0, version.find(VERSION_DELIM) == string::npos ? string::npos : version.find(VERSION_DELIM) + 1);
-
- if (name.empty() || version.empty())
- throw runtime_error("could not determine name and/or version of " + basename + ": Invalid package name");
-
- result.first = name;
- result.second.version = version;
-
- archive = archive_read_new();
- INIT_ARCHIVE(archive);
-
- if (archive_read_open_filename(archive,
- filename.c_str(),
- DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK)
- throw runtime_error_with_errno("could not open " + filename, archive_errno(archive));
-
- for (i = 0; archive_read_next_header(archive, &entry) ==
- ARCHIVE_OK; ++i) {
-
- result.second.files.insert(result.second.files.end(),
- archive_entry_pathname(entry));
-
- mode_t mode = archive_entry_mode(entry);
-
- if (S_ISREG(mode) &&
- archive_read_data_skip(archive) != ARCHIVE_OK)
- throw runtime_error_with_errno("could not read " + filename, archive_errno(archive));
- }
-
- if (i == 0) {
- if (archive_errno(archive) == 0)
- throw runtime_error("empty package");
- else
- throw runtime_error("could not read " + filename);
- }
-
- archive_read_free(archive);
-
- return result;
-}
-
-void pkgutil::pkg_install(const string& filename, const set<string>& keep_list, const set<string>& non_install_list) const
-{
- struct archive* archive;
- struct archive_entry* entry;
- unsigned int i;
- char buf[PATH_MAX];
- string absroot;
-
- archive = archive_read_new();
- INIT_ARCHIVE(archive);
-
- if (archive_read_open_filename(archive,
- filename.c_str(),
- DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK)
- throw runtime_error_with_errno("could not open " + filename, archive_errno(archive));
-
- chdir(root.c_str());
- absroot = getcwd(buf, sizeof(buf));
-
- for (i = 0; archive_read_next_header(archive, &entry) ==
- ARCHIVE_OK; ++i) {
- string archive_filename = archive_entry_pathname(entry);
- string reject_dir = trim_filename(absroot + string("/") + string(PKG_REJECTED));
- string original_filename = trim_filename(absroot + string("/") + archive_filename);
- string real_filename = original_filename;
-
- // Check if file is filtered out via INSTALL
- if (non_install_list.find(archive_filename) != non_install_list.end()) {
- mode_t mode;
-
- cout << utilname << ": ignoring " << archive_filename << endl;
-
- mode = archive_entry_mode(entry);
-
- if (S_ISREG(mode))
- archive_read_data_skip(archive);
-
- continue;
- }
-
- // Check if file should be rejected
- if (file_exists(real_filename) && keep_list.find(archive_filename) != keep_list.end())
- real_filename = trim_filename(reject_dir + string("/") + archive_filename);
-
- archive_entry_set_pathname(entry, const_cast<char*>
- (real_filename.c_str()));
-
- // Extract file
- unsigned int flags = ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM | ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_UNLINK;
-
- if (archive_read_extract(archive, entry, flags) != ARCHIVE_OK) {
- // If a file fails to install we just print an error message and
- // continue trying to install the rest of the package.
- const char* msg = archive_error_string(archive);
- cerr << utilname << ": could not install " + archive_filename << ": " << msg << endl;
- continue;
- }
-
- // Check rejected file
- if (real_filename != original_filename) {
- bool remove_file = false;
- mode_t mode = archive_entry_mode(entry);
-
- // Directory
- if (S_ISDIR(mode))
- remove_file = permissions_equal(real_filename, original_filename);
- // Other files
- else
- remove_file = permissions_equal(real_filename, original_filename) &&
- (file_empty(real_filename) || file_equal(real_filename, original_filename));
-
- // Remove rejected file or signal about its existence
- if (remove_file)
- file_remove(reject_dir, real_filename);
- else
- cout << utilname << ": rejecting " << archive_filename << ", keeping existing version" << endl;
- }
- }
-
- if (i == 0) {
- if (archive_errno(archive) == 0)
- throw runtime_error("empty package");
- else
- throw runtime_error("could not read " + filename);
- }
-
- archive_read_free(archive);
-}
-
-void pkgutil::ldconfig() const
-{
- // Only execute ldconfig if /etc/ld.so.conf exists
- if (file_exists(root + LDCONFIG_CONF)) {
- pid_t pid = fork();
-
- if (pid == -1)
- throw runtime_error_with_errno("fork() failed");
-
- if (pid == 0) {
- execl(LDCONFIG, LDCONFIG, "-r", root.c_str(), (char *) 0);
- const char* msg = strerror(errno);
- cerr << utilname << ": could not execute " << LDCONFIG << ": " << msg << endl;
- exit(EXIT_FAILURE);
- } else {
- if (waitpid(pid, 0, 0) == -1)
- throw runtime_error_with_errno("waitpid() failed");
- }
- }
-}
-
-void pkgutil::pkg_footprint(string& filename) const
-{
- unsigned int i;
- struct archive* archive;
- struct archive_entry* entry;
-
- map<string, mode_t> hardlink_target_modes;
-
- // We first do a run over the archive and remember the modes
- // of regular files.
- // In the second run, we print the footprint - using the stored
- // modes for hardlinks.
- //
- // FIXME the code duplication here is butt ugly
- archive = archive_read_new();
- INIT_ARCHIVE(archive);
-
- if (archive_read_open_filename(archive,
- filename.c_str(),
- DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK)
- throw runtime_error_with_errno("could not open " + filename, archive_errno(archive));
-
- for (i = 0; archive_read_next_header(archive, &entry) ==
- ARCHIVE_OK; ++i) {
-
- mode_t mode = archive_entry_mode(entry);
-
- if (!archive_entry_hardlink(entry)) {
- const char *s = archive_entry_pathname(entry);
-
- hardlink_target_modes[s] = mode;
- }
-
- if (S_ISREG(mode) && archive_read_data_skip(archive))
- throw runtime_error_with_errno("could not read " + filename, archive_errno(archive));
- }
-
- archive_read_free(archive);
-
- // Too bad, there doesn't seem to be a way to reuse our archive
- // instance
- archive = archive_read_new();
- INIT_ARCHIVE(archive);
-
- if (archive_read_open_filename(archive,
- filename.c_str(),
- DEFAULT_BYTES_PER_BLOCK) != ARCHIVE_OK)
- throw runtime_error_with_errno("could not open " + filename, archive_errno(archive));
-
- for (i = 0; archive_read_next_header(archive, &entry) ==
- ARCHIVE_OK; ++i) {
- mode_t mode = archive_entry_mode(entry);
-
- // Access permissions
- if (S_ISLNK(mode)) {
- // Access permissions on symlinks differ among filesystems, e.g. XFS and ext2 have different.
- // To avoid getting different footprints we always use "lrwxrwxrwx".
- cout << "lrwxrwxrwx";
- } else {
- const char *h = archive_entry_hardlink(entry);
-
- if (h)
- cout << mtos(hardlink_target_modes[h]);
- else
- cout << mtos(mode);
- }
-
- cout << '\t';
-
- // User
- uid_t uid = archive_entry_uid(entry);
- struct passwd* pw = getpwuid(uid);
- if (pw)
- cout << pw->pw_name;
- else
- cout << uid;
-
- cout << '/';
-
- // Group
- gid_t gid = archive_entry_gid(entry);
- struct group* gr = getgrgid(gid);
- if (gr)
- cout << gr->gr_name;
- else
- cout << gid;
-
- // Filename
- cout << '\t' << archive_entry_pathname(entry);
-
- // Special cases
- if (S_ISLNK(mode)) {
- // Symlink
- cout << " -> " << archive_entry_symlink(entry);
- } else if (S_ISCHR(mode) ||
- S_ISBLK(mode)) {
- // Device
- cout << " (" << archive_entry_rdevmajor(entry)
- << ", " << archive_entry_rdevminor(entry)
- << ")";
- } else if (S_ISREG(mode) &&
- archive_entry_size(entry) == 0) {
- // Empty regular file
- cout << " (EMPTY)";
- }
-
- cout << '\n';
-
- if (S_ISREG(mode) && archive_read_data_skip(archive))
- throw runtime_error_with_errno("could not read " + filename, archive_errno(archive));
- }
-
- if (i == 0) {
- if (archive_errno(archive) == 0)
- throw runtime_error("empty package");
- else
- throw runtime_error("could not read " + filename);
- }
-
- archive_read_free(archive);
-}
-
-void pkgutil::print_version() const
-{
- cout << utilname << " (pkgutils) " << VERSION << endl;
-}
-
-db_lock::db_lock(const string& root, bool exclusive)
- : dir(0)
-{
- const string dirname = trim_filename(root + string("/") + PKG_DIR);
-
- if (!(dir = opendir(dirname.c_str())))
- throw runtime_error_with_errno("could not read directory " + dirname);
-
- if (flock(dirfd(dir), (exclusive ? LOCK_EX : LOCK_SH) | LOCK_NB) == -1) {
- if (errno == EWOULDBLOCK)
- throw runtime_error("package database is currently locked by another process");
- else
- throw runtime_error_with_errno("could not lock directory " + dirname);
- }
-}
-
-db_lock::~db_lock()
-{
- if (dir) {
- flock(dirfd(dir), LOCK_UN);
- closedir(dir);
- }
-}
-
-void assert_argument(char** argv, int argc, int index)
-{
- if (argc - 1 < index + 1)
- throw runtime_error("option " + string(argv[index]) + " requires an argument");
-}
-
-string itos(unsigned int value)
-{
- static char buf[20];
- sprintf(buf, "%u", value);
- return buf;
-}
-
-string mtos(mode_t mode)
-{
- string s;
-
- // File type
- switch (mode & S_IFMT) {
- case S_IFREG: s += '-'; break; // Regular
- case S_IFDIR: s += 'd'; break; // Directory
- case S_IFLNK: s += 'l'; break; // Symbolic link
- case S_IFCHR: s += 'c'; break; // Character special
- case S_IFBLK: s += 'b'; break; // Block special
- case S_IFSOCK: s += 's'; break; // Socket
- case S_IFIFO: s += 'p'; break; // Fifo
- default: s += '?'; break; // Unknown
- }
-
- // User permissions
- s += (mode & S_IRUSR) ? 'r' : '-';
- s += (mode & S_IWUSR) ? 'w' : '-';
- switch (mode & (S_IXUSR | S_ISUID)) {
- case S_IXUSR: s += 'x'; break;
- case S_ISUID: s += 'S'; break;
- case S_IXUSR | S_ISUID: s += 's'; break;
- default: s += '-'; break;
- }
-
- // Group permissions
- s += (mode & S_IRGRP) ? 'r' : '-';
- s += (mode & S_IWGRP) ? 'w' : '-';
- switch (mode & (S_IXGRP | S_ISGID)) {
- case S_IXGRP: s += 'x'; break;
- case S_ISGID: s += 'S'; break;
- case S_IXGRP | S_ISGID: s += 's'; break;
- default: s += '-'; break;
- }
-
- // Other permissions
- s += (mode & S_IROTH) ? 'r' : '-';
- s += (mode & S_IWOTH) ? 'w' : '-';
- switch (mode & (S_IXOTH | S_ISVTX)) {
- case S_IXOTH: s += 'x'; break;
- case S_ISVTX: s += 'T'; break;
- case S_IXOTH | S_ISVTX: s += 't'; break;
- default: s += '-'; break;
- }
-
- return s;
-}
-
-string trim_filename(const string& filename)
-{
- string search("//");
- string result = filename;
-
- for (string::size_type pos = result.find(search); pos != string::npos; pos = result.find(search))
- result.replace(pos, search.size(), "/");
-
- return result;
-}
-
-bool file_exists(const string& filename)
-{
- struct stat buf;
- return !lstat(filename.c_str(), &buf);
-}
-
-bool file_empty(const string& filename)
-{
- struct stat buf;
-
- if (lstat(filename.c_str(), &buf) == -1)
- return false;
-
- return (S_ISREG(buf.st_mode) && buf.st_size == 0);
-}
-
-bool file_equal(const string& file1, const string& file2)
-{
- struct stat buf1, buf2;
-
- if (lstat(file1.c_str(), &buf1) == -1)
- return false;
-
- if (lstat(file2.c_str(), &buf2) == -1)
- return false;
-
- // Regular files
- if (S_ISREG(buf1.st_mode) && S_ISREG(buf2.st_mode)) {
- ifstream f1(file1.c_str());
- ifstream f2(file2.c_str());
-
- if (!f1 || !f2)
- return false;
-
- while (!f1.eof()) {
- char buffer1[4096];
- char buffer2[4096];
- f1.read(buffer1, 4096);
- f2.read(buffer2, 4096);
- if (f1.gcount() != f2.gcount() ||
- memcmp(buffer1, buffer2, f1.gcount()) ||
- f1.eof() != f2.eof())
- return false;
- }
-
- return true;
- }
- // Symlinks
- else if (S_ISLNK(buf1.st_mode) && S_ISLNK(buf2.st_mode)) {
- char symlink1[MAXPATHLEN];
- char symlink2[MAXPATHLEN];
-
- memset(symlink1, 0, MAXPATHLEN);
- memset(symlink2, 0, MAXPATHLEN);
-
- if (readlink(file1.c_str(), symlink1, MAXPATHLEN - 1) == -1)
- return false;
-
- if (readlink(file2.c_str(), symlink2, MAXPATHLEN - 1) == -1)
- return false;
-
- return !strncmp(symlink1, symlink2, MAXPATHLEN);
- }
- // Character devices
- else if (S_ISCHR(buf1.st_mode) && S_ISCHR(buf2.st_mode)) {
- return buf1.st_dev == buf2.st_dev;
- }
- // Block devices
- else if (S_ISBLK(buf1.st_mode) && S_ISBLK(buf2.st_mode)) {
- return buf1.st_dev == buf2.st_dev;
- }
-
- return false;
-}
-
-bool permissions_equal(const string& file1, const string& file2)
-{
- struct stat buf1;
- struct stat buf2;
-
- if (lstat(file1.c_str(), &buf1) == -1)
- return false;
-
- if (lstat(file2.c_str(), &buf2) == -1)
- return false;
-
- return(buf1.st_mode == buf2.st_mode) &&
- (buf1.st_uid == buf2.st_uid) &&
- (buf1.st_gid == buf2.st_gid);
-}
-
-void file_remove(const string& basedir, const string& filename)
-{
- if (filename != basedir && !remove(filename.c_str())) {
- char* path = strdup(filename.c_str());
- file_remove(basedir, dirname(path));
- free(path);
- }
-}