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_DECL_MKSTEMP)
  30 extern "C" int mkstemp(char *);
  31 #endif
  32
  33 #if !defined(HAVE_MKSTEMP) && defined(HAVE_MKTEMP)
  34 # include <fcntl.h>
  35 # ifdef HAVE_SYS_STAT_H
  36 #  include <sys/stat.h>
  37 # endif
  38 # ifdef HAVE_IO_H
  39 #  include <io.h>
  40 # endif
  41 # ifdef HAVE_PROCESS_H
  42 #  include <process.h>
  43 # endif
  44 #endif
  45
  46 using boost::scoped_array;
  47
  48 using std::string;
  49 using std::endl;
  50
  51 namespace lyx {
  52 namespace support {
  53
  54 namespace {
  55
  56 inline
  57 int make_tempfile(char * templ)
  58 {
  59 #if defined(HAVE_MKSTEMP)
  60         return ::mkstemp(templ);
  61 #elif defined(HAVE_MKTEMP)
  62         // This probably just barely works...
  63         ::mktemp(templ);
  64 # if defined (HAVE_OPEN)
  65 # if (!defined S_IRUSR)
  66 #   define S_IRUSR S_IREAD
  67 #   define S_IWUSR S_IWRITE
  68 # endif
  69         return ::open(templ, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
  70 # elif defined (HAVE__OPEN)
  71         return ::_open(templ,
  72                        _O_RDWR | _O_CREAT | _O_EXCL,
  73                        _S_IREAD | _S_IWRITE);
  74 # else
  75 #  error No open() function.
  76 # endif
  77 #else
  78 #error FIX FIX FIX
  79 #endif
  80 }
  81
  82 } // namespace anon
  83
  84
  85 FileName const tempName(FileName const & dir, string const & mask)
  86 {
  87         string const tmpdir(dir.empty() ?
  88                         package().temp_dir().absFilename() :
  89                         dir.absFilename());
  90         string tmpfl(to_filesystem8bit(from_utf8(addName(tmpdir, mask))));
  91 #if defined (HAVE_GETPID)
  92         tmpfl += convert<string>(getpid());
  93 #elif defined (HAVE__GETPID)
  94         tmpfl += convert<string>(_getpid());
  95 #else
  96 # error No getpid() function
  97 #endif
  98         tmpfl += "XXXXXX";
  99
 100         // The supposedly safe mkstemp version
 101         scoped_array<char> tmpl(new char[tmpfl.length() + 1]); // + 1 for '\0'
 102         tmpfl.copy(tmpl.get(), string::npos);
 103         tmpl[tmpfl.length()] = '\0'; // terminator
 104
 105         int const tmpf = make_tempfile(tmpl.get());
 106         if (tmpf != -1) {
 107                 string const t(to_utf8(from_filesystem8bit(tmpl.get())));
 108 #if defined (HAVE_CLOSE)
 109                 ::close(tmpf);
 110 #elif defined (HAVE__CLOSE)
 111                 ::_close(tmpf);
 112 #else
 113 # error No x() function.
 114 #endif
 115                 LYXERR(Debug::FILES) << "Temporary file `" << t
 116                                      << "' created." << endl;
 117                 return FileName(t);
 118         } else {
 119                 LYXERR(Debug::FILES)
 120                         << "LyX Error: Unable to create temporary file."
 121                         << endl;
 122                 return FileName();
 123         }
 124 }
 125
 126 } // namespace support
 127 } // namespace lyx