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pathut.cpp    952 lines (857 with data), 20.8 kB

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/* Copyright (C) 2004 J.F.Dockes
* 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.
*/
#ifndef TEST_PATHUT
#include "autoconfig.h"
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <dirent.h>
#include <sys/param.h>
#include <pwd.h>
#include <math.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <glob.h>
// Let's include all files where statfs can be defined and hope for no
// conflict...
#ifdef HAVE_SYS_MOUNT_H
#include <sys/mount.h>
#endif
#ifdef HAVE_SYS_STATFS_H
#include <sys/statfs.h>
#endif
#ifdef HAVE_SYS_STATVFS_H
#include <sys/statvfs.h>
#endif
#ifdef HAVE_SYS_VFS_H
#include <sys/vfs.h>
#endif
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <sstream>
#include <stack>
#include <set>
using namespace std;
#include "pathut.h"
#include "transcode.h"
#include "wipedir.h"
#include "md5ut.h"
bool fsocc(const string &path, int *pc, long long *blocks)
{
#ifdef sun
struct statvfs buf;
if (statvfs(path.c_str(), &buf) != 0) {
return false;
}
#else
struct statfs buf;
if (statfs(path.c_str(), &buf) != 0) {
return false;
}
#endif
// used blocks
double fpc = 0.0;
#define FSOCC_USED (double(buf.f_blocks - buf.f_bfree))
#define FSOCC_TOTAVAIL (FSOCC_USED + double(buf.f_bavail))
if (FSOCC_TOTAVAIL > 0) {
fpc = 100.0 * FSOCC_USED / FSOCC_TOTAVAIL;
}
*pc = int(fpc);
if (blocks) {
*blocks = 0;
#define FSOCC_MB (1024*1024)
if (buf.f_bsize > 0) {
int ratio = buf.f_bsize > FSOCC_MB ? buf.f_bsize / FSOCC_MB :
FSOCC_MB / buf.f_bsize;
*blocks = buf.f_bsize > FSOCC_MB ?
((long long)buf.f_bavail) * ratio :
((long long)buf.f_bavail) / ratio;
}
}
return true;
}
const string& tmplocation()
{
static string stmpdir;
if (stmpdir.empty()) {
const char *tmpdir = getenv("RECOLL_TMPDIR");
if (tmpdir == 0)
tmpdir = getenv("TMPDIR");
if (tmpdir == 0)
tmpdir = "/tmp";
stmpdir = string(tmpdir);
}
return stmpdir;
}
bool maketmpdir(string& tdir, string& reason)
{
tdir = path_cat(tmplocation(), "rcltmpXXXXXX");
char *cp = strdup(tdir.c_str());
if (!cp) {
reason = "maketmpdir: out of memory (for file name !)\n";
tdir.erase();
return false;
}
if (!
#ifdef HAVE_MKDTEMP
mkdtemp(cp)
#else
mktemp(cp)
#endif // HAVE_MKDTEMP
) {
free(cp);
reason = "maketmpdir: mktemp failed for [" + tdir + "] : " +
strerror(errno);
tdir.erase();
return false;
}
tdir = cp;
free(cp);
#ifndef HAVE_MKDTEMP
if (mkdir(tdir.c_str(), 0700) < 0) {
reason = string("maketmpdir: mkdir ") + tdir + " failed";
tdir.erase();
return false;
}
#endif
return true;
}
TempFileInternal::TempFileInternal(const string& suffix)
: m_noremove(false)
{
string filename = path_cat(tmplocation(), "rcltmpfXXXXXX");
char *cp = strdup(filename.c_str());
if (!cp) {
m_reason = "Out of memory (for file name !)\n";
return;
}
// Yes using mkstemp this way is awful (bot the suffix adding and
// using mkstemp() just to avoid the warnings)
int fd;
if ((fd = mkstemp(cp)) < 0) {
free(cp);
m_reason = "TempFileInternal: mkstemp failed\n";
return;
}
close(fd);
unlink(cp);
filename = cp;
free(cp);
m_filename = filename + suffix;
if (close(open(m_filename.c_str(), O_CREAT|O_EXCL, 0600)) != 0) {
m_reason = string("Could not open/create") + m_filename;
m_filename.erase();
}
}
TempFileInternal::~TempFileInternal()
{
if (!m_filename.empty() && !m_noremove)
unlink(m_filename.c_str());
}
TempDir::TempDir()
{
if (!maketmpdir(m_dirname, m_reason)) {
m_dirname.erase();
return;
}
}
TempDir::~TempDir()
{
if (!m_dirname.empty()) {
(void)wipedir(m_dirname, true, true);
m_dirname.erase();
}
}
bool TempDir::wipe()
{
if (m_dirname.empty()) {
m_reason = "TempDir::wipe: no directory !\n";
return false;
}
if (wipedir(m_dirname, false, true)) {
m_reason = "TempDir::wipe: wipedir failed\n";
return false;
}
return true;
}
void path_catslash(string &s) {
if (s.empty() || s[s.length() - 1] != '/')
s += '/';
}
string path_cat(const string &s1, const string &s2) {
string res = s1;
path_catslash(res);
res += s2;
return res;
}
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_basename(const string &s, const string &suff)
{
string simple = path_getsimple(s);
string::size_type pos = string::npos;
if (suff.length() && simple.length() > suff.length()) {
pos = simple.rfind(suff);
if (pos != string::npos && pos + suff.length() == simple.length())
return simple.substr(0, pos);
}
return simple;
}
string path_suffix(const string& s)
{
string::size_type dotp = s.rfind('.');
if (dotp == string::npos)
return string();
return s.substr(dotp+1);
}
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;
}
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;
}
string path_absolute(const string &is)
{
if (is.length() == 0)
return is;
string s = is;
if (s[0] != '/') {
char buf[MAXPATHLEN];
if (!getcwd(buf, MAXPATHLEN)) {
return string();
}
s = path_cat(string(buf), s);
}
return s;
}
#include <smallut.h>
string path_canon(const string &is, const string* cwd)
{
if (is.length() == 0)
return is;
string s = is;
if (s[0] != '/') {
char buf[MAXPATHLEN];
const char *cwdp = buf;
if (cwd) {
cwdp = cwd->c_str();
} else {
if (!getcwd(buf, MAXPATHLEN)) {
return string();
}
}
s = path_cat(string(cwdp), s);
}
vector<string> elems;
stringToTokens(s, elems, "/");
vector<string> cleaned;
for (vector<string>::const_iterator it = elems.begin();
it != elems.end(); it++){
if (*it == "..") {
if (!cleaned.empty())
cleaned.pop_back();
} else if (it->empty() || *it == ".") {
} else {
cleaned.push_back(*it);
}
}
string ret;
if (!cleaned.empty()) {
for (vector<string>::const_iterator it = cleaned.begin();
it != cleaned.end(); it++) {
ret += "/";
ret += *it;
}
} else {
ret = "/";
}
return ret;
}
bool makepath(const string& ipath)
{
string path = path_canon(ipath);
vector<string> elems;
stringToTokens(path, elems, "/");
path = "/";
for (vector<string>::const_iterator it = elems.begin();
it != elems.end(); it++){
path += *it;
// Not using path_isdir() here, because this cant grok symlinks
// If we hit an existing file, no worry, mkdir will just fail.
if (access(path.c_str(), 0) != 0) {
if (mkdir(path.c_str(), 0700) != 0) {
return false;
}
}
path += "/";
}
return true;
}
vector<string> path_dirglob(const string &dir, const string pattern)
{
vector<string> res;
glob_t mglob;
string mypat=path_cat(dir, pattern);
if (glob(mypat.c_str(), 0, 0, &mglob)) {
return res;
}
for (int i = 0; i < int(mglob.gl_pathc); i++) {
res.push_back(mglob.gl_pathv[i]);
}
globfree(&mglob);
return res;
}
bool path_isdir(const string& path)
{
struct stat st;
if (lstat(path.c_str(), &st) < 0)
return false;
if (S_ISDIR(st.st_mode))
return true;
return false;
}
// Allowed punctuation in the path part of an URI according to RFC2396
// -_.!~*'():@&=+$,
/*
21 !
22 "
23 #
24 $
25 %
26 &
27 '
28 (
29 )
2A *
2B +
2C ,
2D -
2E .
2F /
30 0
...
39 9
3A :
3B ;
3C <
3D =
3E >
3F ?
40 @
41 A
...
5A Z
5B [
5C \
5D ]
5E ^
5F _
60 `
61 a
...
7A z
7B {
7C |
7D }
7E ~
7F DEL
*/
string url_encode(const string& url, string::size_type offs)
{
string out = url.substr(0, offs);
const char *cp = url.c_str();
for (string::size_type i = offs; i < url.size(); i++) {
unsigned int c;
const char *h = "0123456789ABCDEF";
c = cp[i];
if (c <= 0x20 ||
c >= 0x7f ||
c == '"' ||
c == '#' ||
c == '%' ||
c == ';' ||
c == '<' ||
c == '>' ||
c == '?' ||
c == '[' ||
c == '\\' ||
c == ']' ||
c == '^' ||
c == '`' ||
c == '{' ||
c == '|' ||
c == '}' ) {
out += '%';
out += h[(c >> 4) & 0xf];
out += h[c & 0xf];
} else {
out += char(c);
}
}
return out;
}
string url_gpath(const string& url)
{
// Remove the access schema part (or whatever it's called)
string::size_type colon = url.find_first_of(":");
if (colon == string::npos || colon == url.size() - 1)
return url;
// If there are non-alphanum chars before the ':', then there
// probably is no scheme. Whatever...
for (string::size_type i = 0; i < colon; i++) {
if (!isalnum(url.at(i)))
return url;
}
// In addition we canonize the path to remove empty host parts
// (for compatibility with older versions of recoll where file://
// was hardcoded, but the local path was used for doc
// identification.
return path_canon(url.substr(colon+1));
}
string url_parentfolder(const string& url)
{
// In general, the parent is the directory above the full path
string parenturl = path_getfather(url_gpath(url));
// But if this is http, make sure to keep the host part. Recoll
// only has file or http urls for now.
bool isfileurl = urlisfileurl(url);
if (!isfileurl && parenturl == "/") {
parenturl = url_gpath(url);
}
return isfileurl ? string("file://") + parenturl :
string("http://") + parenturl;
}
// Convert to file path if url is like file:
// Note: this only works with our internal pseudo-urls which are not
// encoded/escaped
string fileurltolocalpath(string url)
{
if (url.find("file://") == 0)
url = url.substr(7, string::npos);
else
return string();
string::size_type pos;
if ((pos = url.find_last_of("#")) != string::npos) {
url.erase(pos);
}
return url;
}
bool urlisfileurl(const string& url)
{
return url.find("file://") == 0;
}
// Printable url: this is used to transcode from the system charset
// into either utf-8 if transcoding succeeds, or url-encoded
bool printableUrl(const string &fcharset, const string &in, string &out)
{
int ecnt = 0;
if (!transcode(in, out, fcharset, "UTF-8", &ecnt) || ecnt) {
out = url_encode(in, 7);
}
return true;
}
bool readdir(const string& dir, string& reason, set<string>& entries)
{
struct stat st;
int statret;
ostringstream msg;
DIR *d = 0;
statret = lstat(dir.c_str(), &st);
if (statret == -1) {
msg << "readdir: cant stat " << dir << " errno " << errno;
goto out;
}
if (!S_ISDIR(st.st_mode)) {
msg << "readdir: " << dir << " not a directory";
goto out;
}
if (access(dir.c_str(), R_OK) < 0) {
msg << "readdir: no read access to " << dir;
goto out;
}
d = opendir(dir.c_str());
if (d == 0) {
msg << "readdir: cant opendir " << dir << ", errno " << errno;
goto out;
}
struct dirent *ent;
while ((ent = readdir(d)) != 0) {
if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
continue;
entries.insert(ent->d_name);
}
out:
if (d)
closedir(d);
reason = msg.str();
if (reason.empty())
return true;
return false;
}
// We do not want to mess with the pidfile content in the destructor:
// the lock might still be in use in a child process. In fact as much
// as we'd like to reset the pid inside the file when we're done, it
// would be very difficult to do it right and it's probably best left
// alone.
Pidfile::~Pidfile()
{
if (m_fd >= 0)
::close(m_fd);
m_fd = -1;
}
pid_t Pidfile::read_pid()
{
int fd = ::open(m_path.c_str(), O_RDONLY);
if (fd == -1)
return (pid_t)-1;
char buf[16];
int i = read(fd, buf, sizeof(buf) - 1);
::close(fd);
if (i <= 0)
return (pid_t)-1;
buf[i] = '\0';
char *endptr;
pid_t pid = strtol(buf, &endptr, 10);
if (endptr != &buf[i])
return (pid_t)-1;
return pid;
}
int Pidfile::flopen()
{
const char *path = m_path.c_str();
if ((m_fd = ::open(path, O_RDWR|O_CREAT, 0644)) == -1) {
m_reason = "Open failed: [" + m_path + "]: " + strerror(errno);
return -1;
}
#ifdef sun
struct flock lockdata;
lockdata.l_start = 0;
lockdata.l_len = 0;
lockdata.l_type = F_WRLCK;
lockdata.l_whence = SEEK_SET;
if (fcntl(m_fd, F_SETLK, &lockdata) != 0) {
int serrno = errno;
(void)::close(m_fd);
errno = serrno;
m_reason = "fcntl lock failed";
return -1;
}
#else
int operation = LOCK_EX | LOCK_NB;
if (flock(m_fd, operation) == -1) {
int serrno = errno;
(void)::close(m_fd);
errno = serrno;
m_reason = "flock failed";
return -1;
}
#endif // ! sun
if (ftruncate(m_fd, 0) != 0) {
/* can't happen [tm] */
int serrno = errno;
(void)::close(m_fd);
errno = serrno;
m_reason = "ftruncate failed";
return -1;
}
return 0;
}
pid_t Pidfile::open()
{
if (flopen() < 0) {
return read_pid();
}
return (pid_t)0;
}
int Pidfile::write_pid()
{
/* truncate to allow multiple calls */
if (ftruncate(m_fd, 0) == -1) {
m_reason = "ftruncate failed";
return -1;
}
char pidstr[20];
sprintf(pidstr, "%u", int(getpid()));
lseek(m_fd, 0, 0);
if (::write(m_fd, pidstr, strlen(pidstr)) != (ssize_t)strlen(pidstr)) {
m_reason = "write failed";
return -1;
}
return 0;
}
int Pidfile::close()
{
return ::close(m_fd);
}
int Pidfile::remove()
{
return unlink(m_path.c_str());
}
// Freedesktop standard paths for cache directory (thumbnails are now in there)
static const string& xdgcachedir()
{
static string xdgcache;
if (xdgcache.empty()) {
const char *cp = getenv("XDG_CACHE_HOME");
if (cp == 0)
xdgcache = path_cat(path_home(), ".cache");
else
xdgcache = string(cp);
}
return xdgcache;
}
static const string& thumbnailsdir()
{
static string thumbnailsd;
if (thumbnailsd.empty()) {
thumbnailsd = path_cat(xdgcachedir(), "thumbnails");
if (access(thumbnailsd.c_str(), 0) != 0) {
thumbnailsd = path_cat(path_home(), ".thumbnails");
}
}
return thumbnailsd;
}
// Place for 256x256 files
static const string thmbdirlarge = "large";
// 128x128
static const string thmbdirnormal = "normal";
static void thumbname(const string& url, string& name)
{
string digest;
string l_url = url_encode(url);
MD5String(l_url, digest);
MD5HexPrint(digest, name);
name += ".png";
}
bool thumbPathForUrl(const string& url, int size, string& path)
{
string name;
thumbname(url, name);
if (size <= 128) {
path = path_cat(thumbnailsdir(), thmbdirnormal);
path = path_cat(path, name);
if (access(path.c_str(), R_OK) == 0) {
return true;
}
}
path = path_cat(thumbnailsdir(), thmbdirlarge);
path = path_cat(path, name);
if (access(path.c_str(), R_OK) == 0) {
return true;
}
// File does not exist. Path corresponds to the large version at this point,
// fix it if needed.
if (size <= 128) {
path = path_cat(path_home(), thmbdirnormal);
path = path_cat(path, name);
}
return false;
}
// Call funcs that need static init (not initially reentrant)
void pathut_init_mt()
{
path_home();
tmplocation();
thumbnailsdir();
}
#else // TEST_PATHUT
#include <stdlib.h>
#include <iostream>
using namespace std;
#include "pathut.h"
void path_to_thumb(const string& _input)
{
string input(_input);
// Make absolute path if needed
if (input[0] != '/')
input = path_absolute(input);
input = string("file://") + path_canon(input);
string path;
//path = url_encode(input, 7);
thumbPathForUrl(input, 7, path);
cout << path << endl;
}
const char *tstvec[] = {"", "/", "/dir", "/dir/", "/dir1/dir2",
"/dir1/dir2",
"./dir", "./dir1/", "dir", "../dir", "/dir/toto.c",
"/dir/.c", "/dir/toto.txt", "toto.txt1"
};
const string ttvec[] = {"/dir", "", "~", "~/sub", "~root", "~root/sub",
"~nosuch", "~nosuch/sub"};
int nttvec = sizeof(ttvec) / sizeof(string);
const char *thisprog;
int main(int argc, const char **argv)
{
thisprog = *argv++;argc--;
string s;
vector<string>::const_iterator it;
#if 0
for (unsigned int i = 0;i < sizeof(tstvec) / sizeof(char *); i++) {
cout << tstvec[i] << " Father " << path_getfather(tstvec[i]) << endl;
}
for (unsigned int i = 0;i < sizeof(tstvec) / sizeof(char *); i++) {
cout << tstvec[i] << " Simple " << path_getsimple(tstvec[i]) << endl;
}
for (unsigned int i = 0;i < sizeof(tstvec) / sizeof(char *); i++) {
cout << tstvec[i] << " Basename " <<
path_basename(tstvec[i], ".txt") << endl;
}
#endif
#if 0
for (int i = 0; i < nttvec; i++) {
cout << "tildexp: '" << ttvec[i] << "' -> '" <<
path_tildexpand(ttvec[i]) << "'" << endl;
}
#endif
#if 0
const string canontst[] = {"/dir1/../../..", "/////", "",
"/dir1/../../.././/////dir2///////",
"../../",
"../../../../../../../../../../"
};
unsigned int nttvec = sizeof(canontst) / sizeof(string);
for (unsigned int i = 0; i < nttvec; i++) {
cout << "canon: '" << canontst[i] << "' -> '" <<
path_canon(canontst[i]) << "'" << endl;
}
#endif
#if 0
if (argc != 2) {
cerr << "Usage: trpathut <dir> <pattern>" << endl;
exit(1);
}
string dir = *argv++;argc--;
string pattern = *argv++;argc--;
vector<string> matched = path_dirglob(dir, pattern);
for (it = matched.begin(); it != matched.end();it++) {
cout << *it << endl;
}
#endif
#if 0
if (argc != 1) {
fprintf(stderr, "Usage: fsocc: trpathut <path>\n");
exit(1);
}
string path = *argv++;argc--;
int pc;
long long blocks;
if (!fsocc(path, &pc, &blocks)) {
fprintf(stderr, "fsocc failed\n");
return 1;
}
printf("pc %d, megabytes %ld\n", pc, blocks);
#endif
#if 0
Pidfile pidfile("/tmp/pathutpidfile");
pid_t pid;
if ((pid = pidfile.open()) != 0) {
cerr << "open failed. reason: " << pidfile.getreason() <<
" return " << pid << endl;
exit(1);
}
pidfile.write_pid();
sleep(10);
pidfile.close();
pidfile.remove();
#endif
#if 1
if (argc > 1) {
cerr << "Usage: thumbpath <filepath>" << endl;
exit(1);
}
string input;
if (argc == 1) {
input = *argv++;
if (input.empty()) {
cerr << "Usage: thumbpath <filepath>" << endl;
exit(1);
}
path_to_thumb(input);
} else {
while (getline(cin, input))
path_to_thumb(input);
}
exit(0);
#endif
#if 0
if (argc != 1) {
cerr << "Usage: trpathut <filename>" << endl;
exit(1);
}
string fn = *argv++;argc--;
string ext = path_suffix(fn);
cout << "Suffix: [" << ext << "]" << endl;
return 0;
#endif
}
#endif // TEST_PATHUT