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Do not use _wfopen() for DOS device filenames #111

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Jan 6, 2014
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Do not use _wfopen() for DOS device filenames #111

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54 changes: 54 additions & 0 deletions compat/mingw.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
#include "../strbuf.h"
#include "../run-command.h"
#include "../cache.h"
#include "../string-list.h"

static const int delay[] = { 0, 1, 10, 20, 40 };
unsigned int _CRT_fmode = _O_BINARY;
Expand Down Expand Up @@ -405,12 +406,60 @@ int mingw_fgetc(FILE *stream)
return ch;
}

static struct string_list_item dos_device_names_items[] = {
{ "AUX", NULL},
{ "CLOCK$", NULL},
{ "COM1", NULL},
{ "COM2", NULL},
{ "COM3", NULL},
{ "COM4", NULL},
{ "CON", NULL},
{ "CONERR$", NULL},
{ "CONIN$", NULL},
{ "CONOUT$", NULL},
{ "LPT1", NULL},
{ "LPT2", NULL},
{ "LPT3", NULL},
{ "NUL", NULL},
{ "PRN", NULL},
{ "aux", NULL},
{ "clock$", NULL},
{ "com1", NULL},
{ "com2", NULL},
{ "com3", NULL},
{ "com4", NULL},
{ "con", NULL},
{ "conerr$", NULL},
{ "conin$", NULL},
{ "conout$", NULL},
{ "lpt1", NULL},
{ "lpt2", NULL},
{ "lpt3", NULL},
{ "nul", NULL},
{ "prn", NULL}
};

static struct string_list dos_device_names = {
&dos_device_names_items[0], ARRAY_SIZE(dos_device_names_items),
0, 0, NULL
};

static int is_dos_device_name(const char *filename)
{
return filename && !strchr(filename, '/') &&
string_list_has_string(&dos_device_names, filename);
}

#undef fopen
FILE *mingw_fopen (const char *filename, const char *otype)
{
int hide = 0;
FILE *file;
wchar_t wfilename[MAX_PATH], wotype[4];

if (is_dos_device_name(filename))
return fopen(filename, otype);

if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
basename((char*)filename)[0] == '.')
hide = access(filename, F_OK);
Expand All @@ -425,11 +474,16 @@ FILE *mingw_fopen (const char *filename, const char *otype)
return file;
}

#undef freopen
FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
{
int hide = 0;
FILE *file;
wchar_t wfilename[MAX_PATH], wotype[4];

if (is_dos_device_name(filename))
return freopen(filename, otype, stream);

if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
basename((char*)filename)[0] == '.')
hide = access(filename, F_OK);
Expand Down