Make sure helper apps we start are in path

QProcess will happily start things in CWD which is not what we want

core/document.cpp

@@ -4202,11 +4202,18 @@ void Document::processSourceReference(const SourceReference *ref)
     const QString cmd = KMacroExpander::expandMacrosShellQuote(p, map);
     if (cmd.isEmpty())
         return;
-    const QStringList args = KShell::splitArgs(cmd);
+    QStringList args = KShell::splitArgs(cmd);
     if (args.isEmpty())
         return;
 
-    KProcess::startDetached(args);
+    const QString prog = args.takeFirst();
+    // Make sure prog is in PATH and not just in the CWD
+    const QString progFullPath = QStandardPaths::findExecutable(prog);
+    if (progFullPath.isEmpty()) {
+        return;
+    }
+
+    KProcess::startDetached(progFullPath, args);
 }
 
 const SourceReference *Document::dynamicSourceReference(int pageNr, double absX, double absY)

generators/dvi/dviFile.cpp

@@ -43,6 +43,7 @@
 
 #include <QLoggingCategory>
 #include <QProcess>
+#include <QStandardPaths>
 #include <QSysInfo>
 #include <QTemporaryFile>
 
@@ -332,6 +333,28 @@ void dvifile::renumber()
     }
 }
 
+void dvifile::pdf2psNotFound(const QString &PDFFilename, QString *converrorms)
+{
+    // Indicates that conversion failed, won't try again.
+    convertedFiles[PDFFilename].clear();
+    if (converrorms != nullptr && !have_complainedAboutMissingPDF2PS) {
+        *converrorms = i18n(
+            "<qt><p>The external program <strong>pdf2ps</strong> could not be started. As a result, "
+            "the PDF-file %1 could not be converted to PostScript. Some graphic elements in your "
+            "document will therefore not be displayed.</p>"
+            "<p><b>Possible reason:</b> The program <strong>pdf2ps</strong> may not be installed "
+            "on your system, or cannot be found in the current search path.</p>"
+            "<p><b>What you can do:</b> The program <strong>pdf2ps</strong> is normally "
+            "contained in distributions of the ghostscript PostScript interpreter system. If "
+            "ghostscript is not installed on your system, you could install it now. "
+            "If you are sure that ghostscript is installed, try to use <strong>pdf2ps</strong> "
+            "from the command line to check if it really works.</p><p><em>PATH:</em> %2</p></qt>",
+            PDFFilename,
+            QString::fromLocal8Bit(qgetenv("PATH")));
+        have_complainedAboutMissingPDF2PS = true;
+    }
+}
+
 QString dvifile::convertPDFtoPS(const QString &PDFFilename, QString *converrorms)
 {
     // Check if the PDFFile is known
@@ -341,6 +364,13 @@ QString dvifile::convertPDFtoPS(const QString &PDFFilename, QString *converrorms
         return it.value();
     }
 
+    // Make sure pdf2ps is in PATH and not just in the CWD
+    static const QString fullPath = QStandardPaths::findExecutable(QStringLiteral("pdf2ps"));
+    if (!fullPath.isEmpty()) {
+        pdf2psNotFound(PDFFilename, converrorms);
+        return QString();
+    }
+
     // Get the name of a temporary file.
     // Must open the QTemporaryFile to access the name.
     QTemporaryFile tmpfile;
@@ -351,27 +381,10 @@ QString dvifile::convertPDFtoPS(const QString &PDFFilename, QString *converrorms
     // Use pdf2ps to do the conversion
     QProcess pdf2ps;
     pdf2ps.setProcessChannelMode(QProcess::MergedChannels);
-    pdf2ps.start(QStringLiteral("pdf2ps"), QStringList() << PDFFilename << convertedFileName, QIODevice::ReadOnly | QIODevice::Text);
+    pdf2ps.start(fullPath, QStringList() << PDFFilename << convertedFileName, QIODevice::ReadOnly | QIODevice::Text);
 
     if (!pdf2ps.waitForStarted()) {
-        // Indicates that conversion failed, won't try again.
-        convertedFiles[PDFFilename].clear();
-        if (converrorms != nullptr && !have_complainedAboutMissingPDF2PS) {
-            *converrorms = i18n(
-                "<qt><p>The external program <strong>pdf2ps</strong> could not be started. As a result, "
-                "the PDF-file %1 could not be converted to PostScript. Some graphic elements in your "
-                "document will therefore not be displayed.</p>"
-                "<p><b>Possible reason:</b> The program <strong>pdf2ps</strong> may not be installed "
-                "on your system, or cannot be found in the current search path.</p>"
-                "<p><b>What you can do:</b> The program <strong>pdf2ps</strong> is normally "
-                "contained in distributions of the ghostscript PostScript interpreter system. If "
-                "ghostscript is not installed on your system, you could install it now. "
-                "If you are sure that ghostscript is installed, try to use <strong>pdf2ps</strong> "
-                "from the command line to check if it really works.</p><p><em>PATH:</em> %2</p></qt>",
-                PDFFilename,
-                QString::fromLocal8Bit(qgetenv("PATH")));
-            have_complainedAboutMissingPDF2PS = true;
-        }
+        pdf2psNotFound(PDFFilename, converrorms);
         return QString();
     }
 

generators/dvi/dviFile.h

@@ -131,6 +131,8 @@ public:
     QString convertPDFtoPS(const QString &PDFFilename, QString *converrorms = nullptr);
 
 private:
+    void pdf2psNotFound(const QString &PDFFilename, QString *converrorms);
+
     /** process_preamble reads the information in the preamble and
         stores it into global variables for later use. */
     void process_preamble();

generators/dvi/dviRenderer_prescan.cpp

@@ -28,6 +28,7 @@
 #include <QImage>
 #include <QPaintDevice>
 #include <QProgressBar>
+#include <QStandardPaths>
 #include <QTextStream>
 
 extern QPainter foreGroundPaint;
@@ -278,11 +279,15 @@ void dviRenderer::prescan_ParsePSHeaderSpecial(const QString &cp)
     // to find it.
     if (!QFile::exists(_file)) {
         // Otherwise, use kpsewhich to find the eps file.
-        KProcess proc;
-        proc << QStringLiteral("kpsewhich") << cp;
-        proc.setOutputChannelMode(KProcess::SeparateChannels);
-        proc.execute();
-        _file = QString::fromLocal8Bit(proc.readLine().trimmed());
+        // Make sure kpsewhich is in PATH and not just in the CWD
+        static const QString fullPath = QStandardPaths::findExecutable(QStringLiteral("kpsewhich"));
+        if (!fullPath.isEmpty()) {
+            KProcess proc;
+            proc << fullPath << cp;
+            proc.setOutputChannelMode(KProcess::SeparateChannels);
+            proc.execute();
+            _file = QString::fromLocal8Bit(proc.readLine().trimmed());
+        }
     }
 
     if (QFile::exists(_file))

generators/dvi/fontEncoding.cpp

@@ -16,6 +16,7 @@
 #include <QFile>
 #include <QLoggingCategory>
 #include <QProcess>
+#include <QStandardPaths>
 #include <QTextStream>
 
 //#define DEBUG_FONTENC
@@ -31,7 +32,14 @@ fontEncoding::fontEncoding(const QString &encName)
     QProcess kpsewhich;
     kpsewhich.setProcessChannelMode(QProcess::MergedChannels);
 
-    kpsewhich.start(QStringLiteral("kpsewhich"), QStringList() << encName, QIODevice::ReadOnly | QIODevice::Text);
+    // Make sure kpsewhich is in PATH and not just in the CWD
+    static const QString fullPath = QStandardPaths::findExecutable(QStringLiteral("kpsewhich"));
+    if (fullPath.isEmpty()) {
+        qCCritical(OkularDviDebug) << "fontEncoding::fontEncoding(...): kpsewhich is not in path." << endl;
+        return;
+    }
+
+    kpsewhich.start(fullPath, QStringList() << encName, QIODevice::ReadOnly | QIODevice::Text);
 
     if (!kpsewhich.waitForStarted()) {
         qCCritical(OkularDviDebug) << "fontEncoding::fontEncoding(...): kpsewhich could not be started." << endl;

generators/dvi/fontMap.cpp

@@ -15,12 +15,16 @@
 #include <QFile>
 #include <QLoggingCategory>
 #include <QProcess>
+#include <QStandardPaths>
 #include <QTextStream>
 
 //#define DEBUG_FONTMAP
 
 fontMap::fontMap()
 {
+    // Make sure kpsewhich is in PATH and not just in the CWD
+    static const QString kpsewhichFullPath = QStandardPaths::findExecutable(QStringLiteral("kpsewhich"));
+
     // Read the map file of ps2pk which will provide us with a
     // dictionary "TeX Font names" <-> "Name of font files, Font Names
     // and Encodings" (example: the font "Times-Roman" is called
@@ -35,7 +39,7 @@ fontMap::fontMap()
     // other way than to try both options one after another. We use the
     // teTeX 3.0 format first.
     QProcess kpsewhich;
-    kpsewhich.start(QStringLiteral("kpsewhich"), QStringList() << QStringLiteral("--format=map") << QStringLiteral("ps2pk.map"), QIODevice::ReadOnly | QIODevice::Text);
+    kpsewhich.start(kpsewhichFullPath, QStringList() << QStringLiteral("--format=map") << QStringLiteral("ps2pk.map"), QIODevice::ReadOnly | QIODevice::Text);
 
     if (!kpsewhich.waitForStarted()) {
         qCCritical(OkularDviDebug) << "fontMap::fontMap(): kpsewhich could not be started." << endl;
@@ -49,7 +53,7 @@ fontMap::fontMap()
     if (map_fileName.isEmpty()) {
         // Map file not found? Then we try the teTeX < 3.0 way of finding
         // the file.
-        kpsewhich.start(QStringLiteral("kpsewhich"), QStringList() << QStringLiteral("--format=dvips config") << QStringLiteral("ps2pk.map"), QIODevice::ReadOnly | QIODevice::Text);
+        kpsewhich.start(kpsewhichFullPath, QStringList() << QStringLiteral("--format=dvips config") << QStringLiteral("ps2pk.map"), QIODevice::ReadOnly | QIODevice::Text);
         if (!kpsewhich.waitForStarted()) {
             qCCritical(OkularDviDebug) << "fontMap::fontMap(): kpsewhich could not be started." << endl;
             return;

generators/dvi/fontpool.cpp

@@ -15,6 +15,7 @@
 
 #include <QApplication>
 #include <QPainter>
+#include <QStandardPaths>
 
 #include <cmath>
 #include <math.h>
@@ -213,6 +214,12 @@ void fontPool::locateFonts()
 
 void fontPool::locateFonts(bool makePK, bool locateTFMonly, bool *virtualFontsFound)
 {
+    // Make sure kpsewhich is in PATH and not just in the CWD
+    static const QString kpsewhichFullPath = QStandardPaths::findExecutable(QStringLiteral("kpsewhich"));
+    if (kpsewhichFullPath.isEmpty()) {
+        return;
+    }
+
     // Set up the kpsewhich process. If pass == 0, look for vf-fonts and
     // disable automatic font generation as vf-fonts can't be
     // generated. If pass == 0, enable font generation, if it was
@@ -264,7 +271,7 @@ void fontPool::locateFonts(bool makePK, bool locateTFMonly, bool *virtualFontsFo
     const QString kpsewhich_exe = QStringLiteral("kpsewhich");
     kpsewhichOutput += QStringLiteral("<b>") + kpsewhich_exe + QLatin1Char(' ') + kpsewhich_args.join(QStringLiteral(" ")) + QStringLiteral("</b>");
 
-    kpsewhich_->start(kpsewhich_exe, kpsewhich_args, QIODevice::ReadOnly | QIODevice::Text);
+    kpsewhich_->start(kpsewhichFullPath, kpsewhich_args, QIODevice::ReadOnly | QIODevice::Text);
     if (!kpsewhich_->waitForStarted()) {
         QApplication::restoreOverrideCursor();
         emit error(i18n("<qt><p>There were problems running <em>kpsewhich</em>. As a result, "

generators/dvi/psgs.cpp

@@ -24,6 +24,7 @@
 #include <QLoggingCategory>
 #include <QPainter>
 #include <QPixmap>
+#include <QStandardPaths>
 #include <QTextStream>
 #include <QTimer>
 
@@ -157,6 +158,13 @@ void ghostscript_interface::gs_generate_graphics_file(const quint16 page, const
         return;
     }
 
+    // Make sure gs is in PATH and not just in the CWD
+    static const QString gsFullPath = QStandardPaths::findExecutable(QStringLiteral("gs"));
+    if (gsFullPath.isEmpty()) {
+        qCCritical(OkularDviDebug) << "gs is not in path" << endl;
+        return;
+    }
+
     pageInfo *info = pageList.value(page);
 
     // Generate a PNG-file
@@ -216,7 +224,7 @@ void ghostscript_interface::gs_generate_graphics_file(const quint16 page, const
     KProcess proc;
     proc.setOutputChannelMode(KProcess::SeparateChannels);
     QStringList argus;
-    argus << QStringLiteral("gs");
+    argus << gsFullPath;
     argus << QStringLiteral("-dSAFER") << QStringLiteral("-dPARANOIDSAFER") << QStringLiteral("-dDELAYSAFER") << QStringLiteral("-dNOPAUSE") << QStringLiteral("-dBATCH");
     argus << QStringLiteral("-sDEVICE=%1").arg(*gsDevice);
     argus << QStringLiteral("-sOutputFile=%1").arg(filename);
@@ -328,8 +336,14 @@ QString ghostscript_interface::locateEPSfile(const QString &filename, const QUrl
     }
 
     // Otherwise, use kpsewhich to find the eps file.
+    // Make sure kpsewhich is in PATH and not just in the CWD
+    static const QString fullPath = QStandardPaths::findExecutable(QStringLiteral("kpsewhich"));
+    if (fullPath.isEmpty()) {
+        return {};
+    }
+
     KProcess proc;
-    proc << QStringLiteral("kpsewhich") << filename;
+    proc << fullPath << filename;
     proc.execute();
     return QString::fromLocal8Bit(proc.readLine().trimmed());
 }