Heiko Voigt <hvo...@hvoigt.net> writes:
> help.c | 15 ++++++++++++---
> 1 file changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/help.c b/help.c
> index 662349d..b41fa21 100644
> --- a/help.c
> +++ b/help.c
> @@ -103,10 +103,19 @@ static int is_executable(const char *name)
> return 0;
>
> #if defined(WIN32) || defined(__CYGWIN__)
> + /* On Windows we cannot use the executable bit. The executable
> + * state is determined by extension only. We do this first
> + * because with virus scanners opening an executeable for
> + * reading is potentially expensive.
> + */
> + if (has_extension(name, ".exe"))
> + return S_IXUSR;
> +
> #if defined(__CYGWIN__)
> if ((st.st_mode & S_IXUSR) == 0)
> #endif
> -{ /* cannot trust the executable bit, peek into the file instead */
> +{ /* now that we know it does not have an executable extension,
> + peek into the file instead */
> char buf[3] = { 0 };
> int n;
> int fd = open(name, O_RDONLY);
> @@ -114,8 +123,8 @@ if ((st.st_mode & S_IXUSR) == 0)
> if (fd >= 0) {
> n = read(fd, buf, 2);
> if (n == 2)
> - /* DOS executables start with "MZ" */
> - if (!strcmp(buf, "#!") || !strcmp(buf, "MZ"))
> + /* look for a she-bang */
> + if (!strcmp(buf, "#!"))
> st.st_mode |= S_IXUSR;
> close(fd);
> }
Would it make sense to move this to compat/win32/, compat/cygwin.c,
and compat/posix.c, each exporting is_executable(const char *path),
so that we do not have to suffer the #ifdef mess?
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