Both files in this commit exhibit the wrong way to use temporary files.

For TEHistory.cpp, it uses tmpfile() which produces a file which has a
name that can be guessed.

For vmemo.cpp, it uses tmpname() which only creates a predictable string.

Both uses have been switched to using mkstemp() wrapped around umask(). This
produces a much less predictable file that also has guaranteed restrictive
permissions.

I went a little farther in vmemo because it calls out to the shell using
system to 'mv' the new file. That is kinda wasteful so I switched it to use
rename instead.

2 files changed, 72 insertions, 28 deletions

diff --git a/core/applets/vmemo/vmemo.cpp b/core/applets/vmemo/vmemo.cpp
index 8ba1eb7..1a8f154 100644
--- a/core/applets/vmemo/vmemo.cpp
+++ b/core/applets/vmemo/vmemo.cpp
@@ -320,60 +320,83 @@ bool VMemo::startRecording() {
   fName = "vm_"+ date + ".wav";
 
   fileName += fName;
   odebug << "filename is " + fileName << oendl;
 
   useAlerts = config.readBoolEntry("Alert",1);
   if(useAlerts) {
     msgLabel = new QLabel( 0, "alertLabel" );
     msgLabel->setText( tr("<B><P><font size=+2>VMemo-Recording</font></B><p>%1</p>").arg("vm_"+ date));
     msgLabel->show();
   }
         
-// open tmp file here
-  char *pointer;
-  pointer=tmpnam(NULL);
-  odebug << "Opening tmp file " << pointer << "" << oendl;
+  // open tmp file here
+  char *tmpFilePath = 0;
+  char *tmpDir = getenv("TMPDIR");
+  if (tmpDir && *tmpDir != '\0') {
+    tmpFilePath = new char[strlen(tmpDir) + strlen("/vmemo-wav-XXXXXX") + 1];
+    strcpy(tmpFilePath, tmpDir);
+    free(tmpDir);
+  } else {
+    tmpFilePath = new char[strlen("/tmp/vmemo-wav-XXXXXX") + 1];
+    strcpy(tmpFilePath, "/tmp");
+  }
+  strcat(tmpFilePath, "/vmemo-wav-XXXXXX");
+  mode_t currUmask = umask(S_IRWXO | S_IRWXG);
+  int tmpFd = mkstemp(tmpFilePath);
+  umask(currUmask);
+  if (tmpFd == -1) {
+    owarn << "Could not open temp file with template " << tmpFilePath
+          << oendl;
+    delete [] tmpFilePath;
+    return false;
+  } else
+    odebug << "Opened temp file " << tmpFilePath << "" << oendl;
+
+  close(tmpFd);
 
-  if(openWAV(pointer ) == -1)  {
+  if(openWAV(tmpFilePath ) == -1)  {
 
     QString err("Could not open the temp file\n");
     err += fileName;
     QMessageBox::critical(0, "vmemo", err, "Abort");
     ::close(dsp);
     return false;
   }
   if( record() ) {
 
-  QString cmd;
-  if( fileName.find(".wav",0,true) == -1)
-      fileName += ".wav";
+    if( fileName.find(".wav",0,true) == -1)
+        fileName += ".wav";
 
-  cmd.sprintf("mv %s "+fileName, pointer);
-// move tmp file to regular file here
-
-  system(cmd.latin1());
-
-  QArray<int> cats(1);
-  cats[0] = config.readNumEntry("Category", 0);
-
-  QString dlName("vm_");
-  dlName += date;
-  DocLnk l;
-  l.setFile(fileName);
-  l.setName(dlName);
-  l.setType("audio/x-wav");
-  l.setCategories(cats);
-  l.writeLink();
-  return true;
+    int retVal = rename(tmpFilePath, fileName.local8Bit());
+    if (retVal == -1) {
+        owarn << "Could not move " << tmpFilePath << " to " << fileName
+              << oendl;
+        delete [] tmpFilePath;
+        return false;
+    }
+    delete [] tmpFilePath;
+
+    QArray<int> cats(1);
+    cats[0] = config.readNumEntry("Category", 0);
+
+    QString dlName("vm_");
+    dlName += date;
+    DocLnk l;
+    l.setFile(fileName);
+    l.setName(dlName);
+    l.setType("audio/x-wav");
+    l.setCategories(cats);
+    l.writeLink();
+    return true;
   } else
       return false;
 
 }
 
 void VMemo::stopRecording() {
 //    show();
     odebug << "Stopped recording" << oendl;
     recording = false;
     if(useAlerts) {
         msgLabel->close();
         msgLabel=0;
diff --git a/noncore/apps/opie-console/TEHistory.cpp b/noncore/apps/opie-console/TEHistory.cpp
index 317ce57..e2be42a 100644
--- a/noncore/apps/opie-console/TEHistory.cpp
+++ b/noncore/apps/opie-console/TEHistory.cpp
@@ -12,24 +12,25 @@
         /*                                                                    */
 /* Ported Konsole to Qt/Embedded                                              */
         /*                                                                    */
 /* Copyright (C) 2000 by John Ryland <jryland@trolltech.com>                  */
         /*                                                                    */
 /* -------------------------------------------------------------------------- */
 
 #include "TEHistory.h"
 #include <stdlib.h>
 #include <assert.h>
 #include <stdio.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <unistd.h>
 #include <errno.h>
 
 #define HERE printf("%s(%d): here\n",__FILE__,__LINE__)
 
 /*
    An arbitrary long scroll.
 
    One can modify the scroll only by adding either cells
    or newlines, but access it randomly.
 
    The model is that of an arbitrary wide typewriter scroll
@@ -87,27 +88,47 @@ HistoryBuffer::~HistoryBuffer()
 {
   setScroll(FALSE);
 }
 
 void HistoryBuffer::setScroll(bool on)
 {
   if (on == hasScroll()) return;
 
   if (on)
   {
     assert( ion < 0 );
     assert( length == 0);
-    FILE* tmp = tmpfile(); if (!tmp) { perror("konsole: cannot open temp file.\n"); return; }
-    ion = dup(fileno(tmp)); if (ion<0) perror("konsole: cannot dup temp file.\n");
-    fclose(tmp);
+    char* tmpDir = getenv("TMPDIR");
+    char* tmpFilePath = 0;
+    if (tmpDir && *tmpDir != '\0') {
+        tmpFilePath = new char[strlen(tmpDir) + strlen("/opie-console-HistoryBuffer-XXXXXX") + 1];
+        strcpy(tmpFilePath, tmpDir);
+        free(tmpDir);
+    } else {
+        tmpFilePath = new char[strlen("/tmp/opie-console-HistoryBuffer-XXXXXX") + 1];
+        strcpy(tmpFilePath, "/tmp");
+    }
+    strcat(tmpFilePath, "/opie-console-HistoryBuffer-XXXXXX");
+    mode_t currUmask = umask(S_IRWXO | S_IRWXG);
+    int tmpfd = mkstemp(tmpFilePath);
+    delete [] tmpFilePath;
+    umask(currUmask);
+    if (tmpfd == -1) {
+        perror("konsole: cannot open temp file.\n");
+        return;
+    }
+    ion = dup(tmpfd);
+    if (ion<0)
+        perror("konsole: cannot dup temp file.\n");
+    close(tmpfd);
   }
   else
   {
     assert( ion >= 0 );
     close(ion);
     ion    = -1;
     length = 0;
   }
 }
 
 bool HistoryBuffer::hasScroll()
 {