src/support/tempname.cpp

   1 /**
   2  * \file tempname.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars Gullik Bjønnes
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "support/lyxlib.h"
  14
  15 #include "support/convert.h"
  16 #include "support/filetools.h"
  17 #include "support/Package.h"
  18
  19 #include "debug.h"
  20
  21 #include <boost/scoped_array.hpp>
  22
  23 #include <cstdlib>
  24
  25 #ifdef HAVE_UNISTD_H
  26 # include <unistd.h>
  27 #endif
  28
  29 #if !defined(HAVE_MKSTEMP) && defined(HAVE_MKTEMP)
  30 # include <fcntl.h>
  31 # ifdef HAVE_SYS_STAT_H
  32 #  include <sys/stat.h>
  33 # endif
  34 # ifdef HAVE_IO_H
  35 #  include <io.h>
  36 # endif
  37 # ifdef HAVE_PROCESS_H
  38 #  include <process.h>
  39 # endif
  40 #endif
  41
  42 using boost::scoped_array;
  43
  44 using std::string;
  45 using std::endl;
  46
  47 namespace lyx {
  48 namespace support {
  49
  50 namespace {
  51
  52 inline
  53 int make_tempfile(char * templ)
  54 {
  55 #if defined(HAVE_MKSTEMP)
  56         return ::mkstemp(templ);
  57 #elif defined(HAVE_MKTEMP)
  58         // This probably just barely works...
  59         ::mktemp(templ);
  60 # if defined (HAVE_OPEN)
  61 # if (!defined S_IRUSR)
  62 #   define S_IRUSR S_IREAD
  63 #   define S_IWUSR S_IWRITE
  64 # endif
  65         return ::open(templ, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
  66 # elif defined (HAVE__OPEN)
  67         return ::_open(templ,
  68                        _O_RDWR | _O_CREAT | _O_EXCL,
  69                        _S_IREAD | _S_IWRITE);
  70 # else
  71 #  error No open() function.
  72 # endif
  73 #else
  74 #error FIX FIX FIX
  75 #endif
  76 }
  77
  78 } // namespace anon
  79
  80
  81 FileName const tempName(FileName const & dir, string const & mask)
  82 {
  83         string const tmpdir(dir.empty() ?
  84                         package().temp_dir().absFilename() :
  85                         dir.absFilename());
  86         string tmpfl(to_filesystem8bit(from_utf8(addName(tmpdir, mask))));
  87 #if defined (HAVE_GETPID)
  88         tmpfl += convert<string>(getpid());
  89 #elif defined (HAVE__GETPID)
  90         tmpfl += convert<string>(_getpid());
  91 #else
  92 # error No getpid() function
  93 #endif
  94         tmpfl += "XXXXXX";
  95
  96         // The supposedly safe mkstemp version
  97         scoped_array<char> tmpl(new char[tmpfl.length() + 1]); // + 1 for '\0'
  98         tmpfl.copy(tmpl.get(), string::npos);
  99         tmpl[tmpfl.length()] = '\0'; // terminator
 100
 101         int const tmpf = make_tempfile(tmpl.get());
 102         if (tmpf != -1) {
 103                 string const t(to_utf8(from_filesystem8bit(tmpl.get())));
 104 #if defined (HAVE_CLOSE)
 105                 ::close(tmpf);
 106 #elif defined (HAVE__CLOSE)
 107                 ::_close(tmpf);
 108 #else
 109 # error No x() function.
 110 #endif
 111                 LYXERR(Debug::FILES) << "Temporary file `" << t
 112                                      << "' created." << endl;
 113                 return FileName(t);
 114         } else {
 115                 LYXERR(Debug::FILES)
 116                         << "LyX Error: Unable to create temporary file."
 117                         << endl;
 118                 return FileName();
 119         }
 120 }
 121
 122 } // namespace support
 123 } // namespace lyx