Chris@57: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@57: 
Chris@57: /*
Chris@57:     EasyMercurial
Chris@57: 
Chris@57:     Based on HgExplorer by Jari Korhonen
Chris@57:     Copyright (c) 2010 Jari Korhonen
Chris@244:     Copyright (c) 2011 Chris Cannam
Chris@244:     Copyright (c) 2011 Queen Mary, University of London
Chris@57:     
Chris@57:     This program is free software; you can redistribute it and/or
Chris@57:     modify it under the terms of the GNU General Public License as
Chris@57:     published by the Free Software Foundation; either version 2 of the
Chris@57:     License, or (at your option) any later version.  See the file
Chris@57:     COPYING included with this distribution for more information.
Chris@57: */
jtkorhonen@0: 
Chris@62: #include "common.h"
Chris@62: #include "debug.h"
jtkorhonen@0: 
Chris@62: #include <QFileInfo>
Chris@62: #include <QProcessEnvironment>
Chris@62: #include <QStringList>
Chris@77: #include <QDir>
Chris@172: #include <QRegExp>
jtkorhonen@0: 
Chris@62: #include <sys/types.h>
Chris@76: 
Chris@76: #ifdef Q_OS_WIN32
Chris@76: #define _WIN32_WINNT 0x0500
Chris@166: #define SECURITY_WIN32 
Chris@76: #include <windows.h>
Chris@76: #include <security.h>
Chris@455: #include <process.h>
Chris@76: #else
Chris@78: #include <errno.h>
Chris@62: #include <pwd.h>
Chris@78: #include <unistd.h>
Chris@80: #include <sys/ioctl.h>
Chris@80: #include <sys/types.h>
Chris@80: #include <sys/stat.h>
Chris@80: #include <fcntl.h>
Chris@105: #include <signal.h>
Chris@443: #include <stdio.h>
Chris@76: #endif
Chris@62: 
Chris@172: QString findInPath(QString name, QString installPath, bool executableRequired)
Chris@62: {
Chris@77:     bool found = false;
Chris@62:     if (name != "") {
Chris@172:         if (name[0] != '/'
Chris@172: #ifdef Q_OS_WIN32
Chris@178:             && (QRegExp("^\\w:").indexIn(name) != 0)
Chris@172: #endif
Chris@178:             ) {
Chris@77: #ifdef Q_OS_WIN32
Chris@77:             QChar pathSep = ';';
Chris@77: #else
Chris@77:             QChar pathSep = ':';
Chris@77: #endif
Chris@62:             name = QFileInfo(name).fileName();
Chris@62:             QString path =
Chris@62:                 QProcessEnvironment::systemEnvironment().value("PATH");
Chris@214:             DEBUG << "findInPath: seeking location for binary " << name
Chris@74:                   << ": system path is " << path << endl;
Chris@172:             if (installPath != "") {   
Chris@214:                 DEBUG << "findInPath: install path is " << installPath
Chris@172:                       << ", adding to system path" << endl;
Chris@172:                 //!!! path = path + pathSep + installPath;
Chris@172:                 path = installPath + pathSep + path;
Chris@172:             }
Chris@74: #ifndef Q_OS_WIN32
Chris@178:             //!!!
Chris@74:             path = path + ":/usr/local/bin";
Chris@74:             DEBUG << "... adding /usr/local/bin just in case (fix and add settings dlg please)"
Chris@74:                     << endl;
Chris@74: #endif
Chris@62:             QStringList elements = path.split(pathSep, QString::SkipEmptyParts);
Chris@62:             foreach (QString element, elements) {
Chris@77:                 QString full = QDir(element).filePath(name);
Chris@62:                 QFileInfo fi(full);
Chris@214:                 DEBUG << "findInPath: looking at " << full << endl;
Chris@172:                 if (fi.exists() && fi.isFile()) {
Chris@214:                     DEBUG << "findInPath: it's a file" << endl;
Chris@172:                     if (!executableRequired || fi.isExecutable()) {
Chris@172:                         name = full;
Chris@214:                         DEBUG << "findInPath: found at " << name << endl;
Chris@172:                         found = true;
Chris@172:                         break;
Chris@172:                     }
Chris@62:                 }
Chris@62:             }
Chris@214:         } else {
Chris@214:             // absolute path given
Chris@214:             QFileInfo fi(name);
Chris@214:             DEBUG << "findInPath: looking at absolute path " << name << endl;
Chris@214:             if (fi.exists() && fi.isFile()) {
Chris@214:                 DEBUG << "findInPath: it's a file" << endl;
Chris@214:                 if (!executableRequired || fi.isExecutable()) {
Chris@214:                     DEBUG << "findInPath: found at " << name << endl;
Chris@214:                     found = true;
Chris@214:                 }
Chris@214:             }
Chris@62:         }
Chris@62:     }
Chris@77: #ifdef Q_OS_WIN32
Chris@77:     if (!found) {
Chris@77:         if (!name.endsWith(".exe")) {
Chris@172:             return findInPath(name + ".exe", installPath, executableRequired);
Chris@77:         }
Chris@77:     }
Chris@77: #endif
Chris@213:     if (found) {
Chris@213:         return name;
Chris@213:     } else {
Chris@213:         return "";
Chris@213:     }
Chris@62: }
jtkorhonen@0: 
Chris@62: #ifdef Q_OS_WIN32
Chris@62: QString getUserRealName()
Chris@62: {
Chris@76:     TCHAR buf[1024];
Chris@76:     long unsigned int maxlen = 1000;
Chris@62:     LPTSTR info = buf;
jtkorhonen@0: 
Chris@76:     if (!GetUserNameEx(NameDisplay, info, &maxlen)) {
Chris@76:         DEBUG << "GetUserNameEx failed: " << GetLastError() << endl;
Chris@62:         return "";
Chris@62:     }
jtkorhonen@0: 
Chris@76: #ifdef UNICODE
Chris@76:     return QString::fromUtf16((const unsigned short *)info);
Chris@76: #else
Chris@76:     return QString::fromLocal8Bit(info);
Chris@76: #endif
Chris@62: }
luisf@71: #else
luisf@71: #ifdef Q_OS_MAC
Chris@62: // Nothing here: definition is in common_osx.mm
Chris@62: #else
Chris@62: QString getUserRealName()
Chris@62: {
Chris@62:     const int maxlen = 1023;
Chris@62:     char buf[maxlen + 2];
jtkorhonen@0: 
Chris@62:     if (getlogin_r(buf, maxlen)) return "";
jtkorhonen@0: 
Chris@62:     struct passwd *p = getpwnam(buf);
Chris@62:     if (!p) return "";
Chris@62:     
Chris@62:     QString s(p->pw_gecos);
Chris@62:     if (s != "") s = s.split(',')[0];
Chris@62:     return s;
Chris@62: }
Chris@62: #endif
luisf@71: #endif
jtkorhonen@0: 
Chris@78: void loseControllingTerminal()
Chris@78: {
Chris@78: #ifndef Q_OS_WIN32
Chris@80: 
Chris@80:     if (!isatty(0)) {
Chris@80:         DEBUG << "stdin is not a terminal" << endl;
Chris@80:     } else {
Chris@80:         DEBUG << "stdin is a terminal, detaching from it" << endl;
Chris@80:         if (ioctl(0, TIOCNOTTY, NULL) < 0) {
Chris@80:             perror("ioctl failed");
Chris@83:             DEBUG << "ioctl for TIOCNOTTY on stdin failed (errno = " << errno << ")" << endl;
Chris@78:         } else {
Chris@83:             DEBUG << "ioctl for TIOCNOTTY on stdin succeeded" << endl;
Chris@83: 	    return;
Chris@78:         }
Chris@80:     }
Chris@80: 
Chris@80:     int ttyfd = open("/dev/tty", O_RDWR);
Chris@80:     if (ttyfd < 0) {
Chris@80:         DEBUG << "failed to open controlling terminal" << endl;
Chris@80:     } else {
Chris@80:         if (ioctl(ttyfd, TIOCNOTTY, NULL) < 0) {
Chris@80:             perror("ioctl failed");
Chris@83:             DEBUG << "ioctl for TIOCNOTTY on controlling terminal failed (errno = " << errno << ")" << endl;
Chris@80:         } else {
Chris@83:             DEBUG << "ioctl for TIOCNOTTY on controlling terminal succeeded" << endl;
Chris@83: 	    return;
Chris@78:         }
Chris@78:     }
Chris@80: 
Chris@78: #endif
Chris@78: }
Chris@79: 
Chris@105: void installSignalHandlers()
Chris@105: {
Chris@105: #ifndef Q_OS_WIN32
Chris@105:     sigset_t sgnals;
Chris@105:     sigemptyset (&sgnals);
Chris@105:     sigaddset(&sgnals, SIGHUP);
Chris@105:     sigaddset(&sgnals, SIGCONT);
Chris@105:     pthread_sigmask(SIG_BLOCK, &sgnals, 0);
Chris@105: #endif
Chris@105: }
Chris@105: 
Chris@455: ProcessStatus
Chris@455: GetProcessStatus(int pid)
Chris@455: {
Chris@455: #ifdef _WIN32
Chris@455:     HANDLE handle = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
Chris@455:     if (!handle) {
Chris@455:         return ProcessNotRunning;
Chris@455:     } else {
Chris@455:         CloseHandle(handle);
Chris@455:         return ProcessRunning;
Chris@455:     }
Chris@455: #else
Chris@455:     if (kill(getpid(), 0) == 0) {
Chris@455:         if (kill(pid, 0) == 0) {
Chris@455:             return ProcessRunning;
Chris@455:         } else {
Chris@455:             return ProcessNotRunning;
Chris@455:         }
Chris@455:     } else {
Chris@455:         return UnknownProcessStatus;
Chris@455:     }
Chris@455: #endif
Chris@455: }
Chris@455: 
Chris@79: FolderStatus getFolderStatus(QString path)
Chris@79: {
Chris@85:     if (path != "/" && path.endsWith("/")) {
Chris@85:         path = path.left(path.length()-1);
Chris@85:     }
Chris@84:     DEBUG << "getFolderStatus: " << path << endl;
Chris@79:     QFileInfo fi(path);
Chris@79:     if (fi.exists()) {
Chris@84:         DEBUG << "exists" << endl;
Chris@79:         QDir dir(path);
Chris@79:         if (!dir.exists()) { // returns false for files
Chris@84:             DEBUG << "not directory" << endl;
Chris@79:             return FolderIsFile;
Chris@79:         }
Chris@79:         if (QDir(dir.filePath(".hg")).exists()) {
Chris@84:             DEBUG << "has repo" << endl;
Chris@79:             return FolderHasRepo;
Chris@79:         }
Chris@79:         return FolderExists;
Chris@79:     } else {
Chris@79:         QDir parent = fi.dir();
Chris@79:         if (parent.exists()) {
Chris@84:             DEBUG << "parent exists" << endl;
Chris@79:             return FolderParentExists;
Chris@79:         }
Chris@79:         return FolderUnknown;
Chris@79:     }
Chris@79: }
Chris@79: 
Chris@79: QString getContainingRepoFolder(QString path)
Chris@79: {
Chris@79:     if (getFolderStatus(path) == FolderHasRepo) return "";
Chris@79: 
Chris@79:     QFileInfo me(path);
Chris@79:     QFileInfo parent(me.dir().absolutePath());
Chris@79: 
Chris@79:     while (me != parent) {
Chris@79:         QString parentPath = parent.filePath();
Chris@79:         if (getFolderStatus(parentPath) == FolderHasRepo) {
Chris@79:             return parentPath;
Chris@79:         }
Chris@79:         me = parent;
Chris@79:         parent = me.dir().absolutePath();
Chris@79:     }
Chris@79: 
Chris@79:     return "";
Chris@79: }
Chris@79: 
Chris@79: QString xmlEncode(QString s)
Chris@79: {
Chris@79:     s
Chris@79: 	.replace("&", "&amp;")
Chris@79: 	.replace("<", "&lt;")
Chris@79: 	.replace(">", "&gt;")
Chris@79: 	.replace("\"", "&quot;")
Chris@79: 	.replace("'", "&apos;");
Chris@79: 
Chris@79:     return s;
Chris@79: }
Chris@408: 
Chris@408: QString uniDecode(QString s)
Chris@408: {
Chris@408:     QString d;
Chris@408:     for (int i = 0; i < s.length(); ++i) {
Chris@412:         // backslash escaped with another backslash: replace with a
Chris@410:         // single backslash and skip on
Chris@411:         if (i+1 < s.length() && s[i] == '\\' && s[i+1] == '\\') {
Chris@411:             d += '\\';
Chris@411:             i += 1;
Chris@410:             continue;
Chris@410:         }
Chris@410:         // unescaped backslash followed by u and at least four more
Chris@410:         // chars: replace with Unicode character
Chris@408:         if (i+5 < s.length() && s[i] == '\\' && s[i+1] == 'u') {
Chris@408:             QString uni = s.mid(i+2, 4);
Chris@408:             QByteArray ba = QByteArray::fromHex(uni.toAscii());
Chris@408:             d += QChar(ba[1], ba[0]);
Chris@408:             i += 5;
Chris@410:             continue;
Chris@408:         }
Chris@410:         // default case: leave alone
Chris@410:         d += s[i];
Chris@408:     }
Chris@408:     return d;
Chris@408: }
Chris@443: 
Chris@443: QByteArray randomKey()
Chris@443: {
Chris@443:     static int len = 16;
Chris@443: 
Chris@443:     QByteArray ba;
Chris@443:     ba.resize(len);
Chris@443:     char *buffer = ba.data();
Chris@443: 
Chris@443: #ifdef Q_OS_WIN32
Chris@443: 
Chris@443:     HCRYPTPROV provider = 0;
Chris@443:     if (!CryptAcquireContextW(&provider, 0, 0,
Chris@443:                               PROV_RSA_FULL,
Chris@443:                               CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) {
Chris@443:         return QByteArray();
Chris@443:     }
Chris@443: 
chris@447:     if (!CryptGenRandom(provider, len, (BYTE *)buffer)) {
Chris@443:         CryptReleaseContext(provider, 0);
Chris@443:         return QByteArray();
Chris@443:     }
Chris@443: 
Chris@443:     CryptReleaseContext(provider, 0);
Chris@443: 
Chris@443: #else
Chris@443:     
Chris@443:     FILE *rf = fopen("/dev/urandom", "r");
Chris@443:     if (!rf) {
Chris@443:         return QByteArray();
Chris@443:     }
Chris@443: 
Chris@443:     for (int i = 0; i < len; ++i) {
Chris@443:         buffer[i] = fgetc(rf);
Chris@443:     }
Chris@443: 
Chris@443:     fclose(rf);
Chris@443: 
Chris@443: #endif
Chris@443: 
Chris@443:     return ba;
Chris@443: }
Chris@443: