#include <stdarg.h>
#include <unistd.h>
-#if !HAVE_FCNTL
-# define rpl_fcntl fcntl
+#ifdef __KLIBC__
+# define INCL_DOS
+# include <os2.h>
#endif
-#undef fcntl
#if defined _WIN32 && ! defined __CYGWIN__
/* Get declarations of the native Windows API functions. */
}
#endif /* W32 */
+/* Forward declarations, because we '#undef fcntl' in the middle of this
+ compilation unit. */
+/* Our implementation of fcntl (fd, F_DUPFD, target). */
+static int rpl_fcntl_DUPFD (int fd, int target);
+/* Our implementation of fcntl (fd, F_DUPFD_CLOEXEC, target). */
+static int rpl_fcntl_DUPFD_CLOEXEC (int fd, int target);
#ifdef __KLIBC__
-
-# define INCL_DOS
-# include <os2.h>
-
-static int
-klibc_fcntl (int fd, int action, /* arg */...)
-{
- va_list arg_ptr;
- int arg;
- struct stat sbuf;
- int result = -1;
-
- va_start (arg_ptr, action);
- arg = va_arg (arg_ptr, int);
- result = fcntl (fd, action, arg);
- /* EPERM for F_DUPFD, ENOTSUP for others */
- if (result == -1 && (errno == EPERM || errno == ENOTSUP)
- && !fstat (fd, &sbuf) && S_ISDIR (sbuf.st_mode))
- {
- ULONG ulMode;
-
- switch (action)
- {
- case F_DUPFD:
- /* Find available fd */
- while (fcntl (arg, F_GETFL) != -1 || errno != EBADF)
- arg++;
-
- result = dup2 (fd, arg);
- break;
-
- /* Using underlying APIs is right ? */
- case F_GETFD:
- if (DosQueryFHState (fd, &ulMode))
- break;
-
- result = (ulMode & OPEN_FLAGS_NOINHERIT) ? FD_CLOEXEC : 0;
- break;
-
- case F_SETFD:
- if (arg & ~FD_CLOEXEC)
- break;
-
- if (DosQueryFHState (fd, &ulMode))
- break;
-
- if (arg & FD_CLOEXEC)
- ulMode |= OPEN_FLAGS_NOINHERIT;
- else
- ulMode &= ~OPEN_FLAGS_NOINHERIT;
-
- /* Filter supported flags. */
- ulMode &= (OPEN_FLAGS_WRITE_THROUGH | OPEN_FLAGS_FAIL_ON_ERROR
- | OPEN_FLAGS_NO_CACHE | OPEN_FLAGS_NOINHERIT);
-
- if (DosSetFHState (fd, ulMode))
- break;
-
- result = 0;
- break;
-
- case F_GETFL:
- result = 0;
- break;
-
- case F_SETFL:
- if (arg != 0)
- break;
-
- result = 0;
- break;
-
- default :
- errno = EINVAL;
- break;
- }
- }
-
- va_end (arg_ptr);
-
- return result;
-}
-
-# define fcntl klibc_fcntl
+/* Adds support for fcntl on directories. */
+static int klibc_fcntl (int fd, int action, /* arg */...);
#endif
+
/* Perform the specified ACTION on the file descriptor FD, possibly
using the argument ARG further described below. This replacement
handles the following actions, and forwards all others on to the
return -1 and set errno. */
int
-rpl_fcntl (int fd, int action, /* arg */...)
+fcntl (int fd, int action, /* arg */...)
+#undef fcntl
+#ifdef __KLIBC__
+# define fcntl klibc_fcntl
+#endif
{
va_list arg;
int result = -1;
va_start (arg, action);
switch (action)
{
-
-#if !HAVE_FCNTL
case F_DUPFD:
{
int target = va_arg (arg, int);
- result = dupfd (fd, target, 0);
+ result = rpl_fcntl_DUPFD (fd, target);
break;
}
-#elif FCNTL_DUPFD_BUGGY || REPLACE_FCHDIR
- case F_DUPFD:
- {
- int target = va_arg (arg, int);
- /* Detect invalid target; needed for cygwin 1.5.x. */
- if (target < 0 || getdtablesize () <= target)
- errno = EINVAL;
- else
- {
- /* Haiku alpha 2 loses fd flags on original. */
- int flags = fcntl (fd, F_GETFD);
- if (flags < 0)
- {
- result = -1;
- break;
- }
- result = fcntl (fd, action, target);
- if (0 <= result && fcntl (fd, F_SETFD, flags) == -1)
- {
- int saved_errno = errno;
- close (result);
- result = -1;
- errno = saved_errno;
- }
-# if REPLACE_FCHDIR
- if (0 <= result)
- result = _gl_register_dup (fd, result);
-# endif
- }
- break;
- } /* F_DUPFD */
-#endif /* FCNTL_DUPFD_BUGGY || REPLACE_FCHDIR */
case F_DUPFD_CLOEXEC:
{
int target = va_arg (arg, int);
-
-#if !HAVE_FCNTL
- result = dupfd (fd, target, O_CLOEXEC);
+ result = rpl_fcntl_DUPFD_CLOEXEC (fd, target);
break;
-#else /* HAVE_FCNTL */
-# if defined __HAIKU__
- /* On Haiku, the system fcntl (fd, F_DUPFD_CLOEXEC, target) sets
- the FD_CLOEXEC flag on fd, not on target. Therefore avoid the
- system fcntl in this case. */
-# define have_dupfd_cloexec -1
-# else
- /* Try the system call first, if the headers claim it exists
- (that is, if GNULIB_defined_F_DUPFD_CLOEXEC is 0), since we
- may be running with a glibc that has the macro but with an
- older kernel that does not support it. Cache the
- information on whether the system call really works, but
- avoid caching failure if the corresponding F_DUPFD fails
- for any reason. 0 = unknown, 1 = yes, -1 = no. */
- static int have_dupfd_cloexec = GNULIB_defined_F_DUPFD_CLOEXEC ? -1 : 0;
- if (0 <= have_dupfd_cloexec)
- {
- result = fcntl (fd, action, target);
- if (0 <= result || errno != EINVAL)
- {
- have_dupfd_cloexec = 1;
-# if REPLACE_FCHDIR
- if (0 <= result)
- result = _gl_register_dup (fd, result);
-# endif
- }
- else
- {
- result = rpl_fcntl (fd, F_DUPFD, target);
- if (result < 0)
- break;
- have_dupfd_cloexec = -1;
- }
- }
- else
-# endif
- result = rpl_fcntl (fd, F_DUPFD, target);
- if (0 <= result && have_dupfd_cloexec == -1)
- {
- int flags = fcntl (result, F_GETFD);
- if (flags < 0 || fcntl (result, F_SETFD, flags | FD_CLOEXEC) == -1)
- {
- int saved_errno = errno;
- close (result);
- errno = saved_errno;
- result = -1;
- }
- }
- break;
-#endif /* HAVE_FCNTL */
- } /* F_DUPFD_CLOEXEC */
+ }
#if !HAVE_FCNTL
case F_GETFD:
va_end (arg);
return result;
}
+
+static int
+rpl_fcntl_DUPFD (int fd, int target)
+{
+ int result;
+#if !HAVE_FCNTL
+ result = dupfd (fd, target, 0);
+#elif FCNTL_DUPFD_BUGGY || REPLACE_FCHDIR
+ /* Detect invalid target; needed for cygwin 1.5.x. */
+ if (target < 0 || getdtablesize () <= target)
+ {
+ result = -1;
+ errno = EINVAL;
+ }
+ else
+ {
+ /* Haiku alpha 2 loses fd flags on original. */
+ int flags = fcntl (fd, F_GETFD);
+ if (flags < 0)
+ {
+ result = -1;
+ break;
+ }
+ result = fcntl (fd, action, target);
+ if (0 <= result && fcntl (fd, F_SETFD, flags) == -1)
+ {
+ int saved_errno = errno;
+ close (result);
+ result = -1;
+ errno = saved_errno;
+ }
+# if REPLACE_FCHDIR
+ if (0 <= result)
+ result = _gl_register_dup (fd, result);
+# endif
+ }
+#else
+ result = fcntl (fd, F_DUPFD, target);
+#endif
+ return result;
+}
+
+static int
+rpl_fcntl_DUPFD_CLOEXEC (int fd, int target)
+{
+ int result;
+#if !HAVE_FCNTL
+ result = dupfd (fd, target, O_CLOEXEC);
+#else /* HAVE_FCNTL */
+# if defined __HAIKU__
+ /* On Haiku, the system fcntl (fd, F_DUPFD_CLOEXEC, target) sets
+ the FD_CLOEXEC flag on fd, not on target. Therefore avoid the
+ system fcntl in this case. */
+# define have_dupfd_cloexec -1
+# else
+ /* Try the system call first, if the headers claim it exists
+ (that is, if GNULIB_defined_F_DUPFD_CLOEXEC is 0), since we
+ may be running with a glibc that has the macro but with an
+ older kernel that does not support it. Cache the
+ information on whether the system call really works, but
+ avoid caching failure if the corresponding F_DUPFD fails
+ for any reason. 0 = unknown, 1 = yes, -1 = no. */
+ static int have_dupfd_cloexec = GNULIB_defined_F_DUPFD_CLOEXEC ? -1 : 0;
+ if (0 <= have_dupfd_cloexec)
+ {
+ result = fcntl (fd, action, target);
+ if (0 <= result || errno != EINVAL)
+ {
+ have_dupfd_cloexec = 1;
+# if REPLACE_FCHDIR
+ if (0 <= result)
+ result = _gl_register_dup (fd, result);
+# endif
+ }
+ else
+ {
+ result = rpl_fcntl_DUPFD (fd, target);
+ if (result < 0)
+ break;
+ have_dupfd_cloexec = -1;
+ }
+ }
+ else
+# endif
+ result = rpl_fcntl_DUPFD (fd, target);
+ if (0 <= result && have_dupfd_cloexec == -1)
+ {
+ int flags = fcntl (result, F_GETFD);
+ if (flags < 0 || fcntl (result, F_SETFD, flags | FD_CLOEXEC) == -1)
+ {
+ int saved_errno = errno;
+ close (result);
+ errno = saved_errno;
+ result = -1;
+ }
+ }
+#endif /* HAVE_FCNTL */
+ return result;
+}
+
+#undef fcntl
+
+#ifdef __KLIBC__
+
+static int
+klibc_fcntl (int fd, int action, /* arg */...);
+{
+ va_list arg_ptr;
+ int arg;
+ struct stat sbuf;
+ int result;
+
+ va_start (arg_ptr, action);
+ arg = va_arg (arg_ptr, int);
+ result = fcntl (fd, action, arg);
+ /* EPERM for F_DUPFD, ENOTSUP for others */
+ if (result == -1 && (errno == EPERM || errno == ENOTSUP)
+ && !fstat (fd, &sbuf) && S_ISDIR (sbuf.st_mode))
+ {
+ ULONG ulMode;
+
+ switch (action)
+ {
+ case F_DUPFD:
+ /* Find available fd */
+ while (fcntl (arg, F_GETFL) != -1 || errno != EBADF)
+ arg++;
+
+ result = dup2 (fd, arg);
+ break;
+
+ /* Using underlying APIs is right ? */
+ case F_GETFD:
+ if (DosQueryFHState (fd, &ulMode))
+ break;
+
+ result = (ulMode & OPEN_FLAGS_NOINHERIT) ? FD_CLOEXEC : 0;
+ break;
+
+ case F_SETFD:
+ if (arg & ~FD_CLOEXEC)
+ break;
+
+ if (DosQueryFHState (fd, &ulMode))
+ break;
+
+ if (arg & FD_CLOEXEC)
+ ulMode |= OPEN_FLAGS_NOINHERIT;
+ else
+ ulMode &= ~OPEN_FLAGS_NOINHERIT;
+
+ /* Filter supported flags. */
+ ulMode &= (OPEN_FLAGS_WRITE_THROUGH | OPEN_FLAGS_FAIL_ON_ERROR
+ | OPEN_FLAGS_NO_CACHE | OPEN_FLAGS_NOINHERIT);
+
+ if (DosSetFHState (fd, ulMode))
+ break;
+
+ result = 0;
+ break;
+
+ case F_GETFL:
+ result = 0;
+ break;
+
+ case F_SETFL:
+ if (arg != 0)
+ break;
+
+ result = 0;
+ break;
+
+ default:
+ errno = EINVAL;
+ break;
+ }
+ }
+
+ va_end (arg_ptr);
+
+ return result;
+}
+
+#endif
projects / thirdparty / gnulib.git / commitdiff
