dongsheng.s...@gmail.com 2015-01-07 10:29:
> From: 宋冬生 <songdongsh...@live.cn>
Hi,
>
> ---
> mingw-w64-crt/Makefile.am | 2 +-
> mingw-w64-crt/misc/mkstemp.c | 91
> ++++++++++++++++++++++++++++++++++++++++++
> mingw-w64-headers/crt/stdlib.h | 1 +
> 3 files changed, 93 insertions(+), 1 deletion(-)
> create mode 100644 mingw-w64-crt/misc/mkstemp.c
>
> diff --git a/mingw-w64-crt/Makefile.am b/mingw-w64-crt/Makefile.am
> index b0ac2f2..3348ea2 100644
> --- a/mingw-w64-crt/Makefile.am
> +++ b/mingw-w64-crt/Makefile.am
> @@ -263,7 +263,7 @@ src_libmingwex=\
> misc/gettimeofday.c misc/imaxabs.c misc/imaxdiv.c
> misc/isblank.c misc/iswblank.c \
> misc/mbrtowc.c misc/mbsinit.c misc/mempcpy.c
> misc/mingw-aligned-malloc.c misc/mingw-fseek.c \
> misc/mingw_matherr.c misc/mingw_mbwc_convert.c
> misc/mingw_usleep.c misc/mingw_wcstod.c
> misc/mingw_wcstof.c \
> - misc/mingw_wcstold.c misc/seterrno.c misc/sleep.c
> misc/spawnv.c \
> + misc/mingw_wcstold.c misc/mkstemp.c misc/seterrno.c
> misc/sleep.c misc/spawnv.c \
> misc/spawnve.c misc/spawnvp.c misc/spawnvpe.c
> misc/strnlen.c misc/strsafe.c \
> misc/strtoimax.c misc/strtold.c misc/strtoumax.c
> misc/tdelete.c misc/tfind.c \
> misc/tsearch.c misc/twalk.c
> misc/uchar_c16rtomb.c misc/uchar_c32rtomb.c
> misc/uchar_mbrtoc16.c \
> diff --git a/mingw-w64-crt/misc/mkstemp.c
> b/mingw-w64-crt/misc/mkstemp.c
> new file mode 100644
> index 0000000..081b512
> --- /dev/null
> +++ b/mingw-w64-crt/misc/mkstemp.c
> @@ -0,0 +1,91 @@
> +#include <stdlib.h>
> +#include <stdio.h>
> +#include <string.h>
> +#include <io.h>
> +#include <errno.h>
> +#include <share.h>
> +#include <fcntl.h>
> +#include <sys/stat.h>
> +
> +/*
> + The mkstemp() function generates a unique temporary filename from
> template,
> + creates and opens the file, and returns an open file descriptor
> for the
> + file.
> +
> + The template may be any file name with at least six trailing Xs,
> for example
> + /tmp/temp.XXXXXXXX. The trailing Xs are replaced with a unique
> digit and
> + letter combination that makes the file name unique. Since it will
> be
> + modified, template must not be a string constant, but should be
> declared as
> + a character array.
> +
> + The file is created with permissions 0600, that is, read plus
> write for
> + owner only. The returned file descriptor provides both read and
> write access
> + to the file.
> + */
> +int __cdecl mkstemp (char *template_name)
> +{
> + errno_t ec;
> + int i, j, fd, len, index;
> +
> + /* These are the (62) characters used in temporary filenames. */
> + static const char letters[] =
> "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
> +
> + /* The last six characters of template must be "XXXXXX" */
> + if (template_name == NULL || (len = strlen (template_name)) < 6
> + || memcmp (template_name + (len - 6), "XXXXXX", 6)) {
> + errno = EINVAL;
> + return -1;
> + }
It will be better if "XXXXXX" and '6' will be variables:
static const char x_template[] = "XXXXXX";
static const int x_template_len = sizeof(x_template)-1;
and the test for 'template_name == NULL' I propose to move to the top of
the function.
in this case, the code look like this:
if (template_name == NULL) {
errno = EINVAL;
return -1;
}
static const char letters[]
="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
static const char x_template[] = "XXXXXX";
static const int x_template_len = sizeof(x_template)-1;
const int len = strlen(template_name);
/* The last six characters of template must be "XXXXXX" */
if (len < x_template_len
|| memcmp (template_name + (len - x_template_len), x_template,
x_template_len)) {
errno = EINVAL;
return -1;
}
...
> +
> + /* User may supply more than six trailing Xs */
> + for (index = len - 6; index > 0 && template_name[index - 1] ==
> 'X'; index--);
> +
> + /*
> + Like OpenBSD, mkstemp() will try at least 2 ** 31 combinations
> before
> + giving up.
> + */
> + for (i = 0; i >= 0; i++) {
> + for(j = index; j < len; j++) {
> + template_name[j] = letters[rand () % 62];
> + }
> +
> + ec = _sopen_s (&fd, template_name,
> + _O_RDWR | _O_CREAT | _O_EXCL | _O_TEMPORARY |
> _O_BINARY,
> + SH_DENYRW, _S_IREAD | _S_IWRITE);
> + if (ec == 0) return fd;
> + if (ec != EEXIST) return -1;
> + }
> +
> + return -1;
> +}
> +
> +#if 0
> +int main (int argc, char *argv[])
> +{
> + int i, fd;
> +
> + for (i = 0; i < 10; i++) {
> + char template_name[] = { "temp_XXXXXX" };
> + fd = mkstemp (template_name);
> + if (fd >= 0) {
> + fprintf (stderr, "fd=%d, name=%s\n", fd, template_name);
> + _close (fd);
> + } else {
> + fprintf (stderr, "errno=%d\n", errno);
> + }
> + }
> +
> + for (i = 0; i < 10; i++) {
> + char template_name[] = { "temp_XXXXXXXX" };
> + fd = mkstemp (template_name);
> + if (fd >= 0) {
> + fprintf (stderr, "fd=%d, name=%s\n", fd, template_name);
> + _close (fd);
> + } else {
> + fprintf (stderr, "errno=%d\n", errno);
> + }
> + }
> +
> + return 0;
> +}
> +#endif
> diff --git a/mingw-w64-headers/crt/stdlib.h
> b/mingw-w64-headers/crt/stdlib.h
> index 7743452..fe44195 100644
> --- a/mingw-w64-headers/crt/stdlib.h
> +++ b/mingw-w64-headers/crt/stdlib.h
> @@ -378,6 +378,7 @@ extern "C" {
> _CRTIMP int __cdecl _mbtowc_l(wchar_t * __restrict__ _DstCh,const
> char * __restrict__ _SrcCh,size_t _SrcSizeInBytes,_locale_t _Locale);
> size_t __cdecl mbstowcs(wchar_t * __restrict__ _Dest,const char *
> __restrict__ _Source,size_t _MaxCount);
> _CRTIMP size_t __cdecl _mbstowcs_l(wchar_t * __restrict__
> _Dest,const char * __restrict__ _Source,size_t _MaxCount,_locale_t
> _Locale);
> + int __cdecl mkstemp(char *template);
> int __cdecl rand(void);
> _CRTIMP int __cdecl _set_error_mode(int _Mode);
> void __cdecl srand(unsigned int _Seed);
--
Regards, niXman
___________________________________________________
Dual-target(32 & 64-bit) MinGW-W64 compilers for 32 and 64-bit Windows:
http://sourceforge.net/projects/mingw-w64/
___________________________________________________
Another online IDE: http://liveworkspace.org/
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