src/support/tempname.C

   1 #include <config.h>
   2
   3 #include <cstdlib>
   4 #include <unistd.h>
   5
   6 #include "LString.h"
   7 #include "support/lyxlib.h"
   8 #include "support/filetools.h"
   9 #include "support/lstrings.h"
  10 #include "debug.h"
  11 #include "os.h"
  12
  13 using std::endl;
  14
  15
  16 namespace {
  17
  18 inline
  19 int make_tempfile(char * templ)
  20 {
  21 #ifdef HAVE_MKSTEMP
  22         return ::mkstemp(templ);
  23 #else
  24 #ifdef HAVE_MKTEMP
  25         // This probably just barely works...
  26         ::mktemp(templ);
  27         return ::open(templ, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
  28 #else
  29 #ifdef WITH_WARNINGS
  30 #warning FIX FIX FIX
  31 #endif
  32 #endif
  33 #endif
  34 }
  35
  36 } // namespace anon
  37
  38
  39 string const lyx::tempName(string const & dir, string const & mask)
  40 {
  41         string const tmpdir(dir.empty() ? os::getTmpDir() : dir);
  42         string tmpfl(AddName(tmpdir, mask));
  43         tmpfl += tostr(getpid());
  44         tmpfl += "XXXXXX";
  45
  46         // The supposedly safe mkstemp version
  47         char * tmpl = new char[tmpfl.length() + 1]; // + 1 for '\0'
  48         tmpfl.copy(tmpl, string::npos);
  49         tmpl[tmpfl.length()] = '\0'; // terminator
  50
  51         int const tmpf = make_tempfile(tmpl);
  52         if (tmpf != -1) {
  53                 string const t(tmpl);
  54                 ::close(tmpf);
  55                 delete [] tmpl;
  56                 lyxerr[Debug::FILES] << "Temporary file `" << t
  57                                      << "' created." << endl;
  58                 return t;
  59         } else {
  60                 lyxerr[Debug::FILES]
  61                         << "LyX Error: Unable to create temporary file."
  62                         << endl;
  63                 delete [] tmpl;
  64                 return string();
  65         }
  66 }