Author: Ronan Lamy <[email protected]>
Branch: rposix-for-3
Changeset: r83238:feaaeac012f4
Date: 2016-03-22 02:37 +0000
http://bitbucket.org/pypy/pypy/changeset/feaaeac012f4/
Log: Begin implementing missing rposix functions: faccessat(), linkat()
diff --git a/rpython/rlib/rposix.py b/rpython/rlib/rposix.py
--- a/rpython/rlib/rposix.py
+++ b/rpython/rlib/rposix.py
@@ -22,21 +22,6 @@
from rpython.rlib import rwin32
from rpython.rlib.rwin32file import make_win32_traits
-class CConfig:
- _compilation_info_ = ExternalCompilationInfo(
- includes=['sys/stat.h',
- 'unistd.h',
- 'fcntl.h'],
- )
- for _name in """fchdir fchmod fchmodat fchown fchownat fexecve fdopendir
- fpathconf fstat fstatat fstatvfs ftruncate futimens futimes
- futimesat linkat lchflags lchmod lchown lstat lutimes
- mkdirat mkfifoat mknodat openat readlinkat renameat
- symlinkat unlinkat utimensat""".split():
- locals()['HAVE_%s' % _name.upper()] = rffi_platform.Has(_name)
-cConfig = rffi_platform.configure(CConfig)
-globals().update(cConfig)
-
class CConstantErrno(CConstant):
# these accessors are used when calling get_errno() or set_errno()
@@ -1739,3 +1724,64 @@
def getcontroller(self):
from rpython.rlib.rposix_environ import OsEnvironController
return OsEnvironController()
+
+
+# ____________________________________________________________
+# Support for f... and ...at families of POSIX functions
+
+class CConfig:
+ _compilation_info_ = ExternalCompilationInfo(
+ includes=['sys/stat.h',
+ 'unistd.h',
+ 'fcntl.h'],
+ )
+ AT_FDCWD = rffi_platform.DefinedConstantInteger('AT_FDCWD')
+ AT_SYMLINK_NOFOLLOW =
rffi_platform.DefinedConstantInteger('AT_SYMLINK_NOFOLLOW')
+ AT_EACCESS = rffi_platform.DefinedConstantInteger('AT_EACCESS')
+
+ for _name in """faccessat fchdir fchmod fchmodat fchown fchownat fexecve
+ fdopendir fpathconf fstat fstatat fstatvfs ftruncate
+ futimens futimes futimesat linkat chflags lchflags lchmod lchown
+ lstat lutimes mkdirat mkfifoat mknodat openat readlinkat renameat
+ symlinkat unlinkat utimensat""".split():
+ locals()['HAVE_%s' % _name.upper()] = rffi_platform.Has(_name)
+cConfig = rffi_platform.configure(CConfig)
+globals().update(cConfig)
+
+if HAVE_FACCESSAT:
+ c_faccessat = external('faccessat',
+ [rffi.INT, rffi.CCHARP, rffi.INT, rffi.INT], rffi.INT)
+
+ def faccessat(pathname, mode, dir_fd=AT_FDCWD,
+ effective_ids=False, follow_symlinks=True):
+ """Thin wrapper around faccessat(2) with an interface simlar to
+ Python3's os.access().
+ """
+ flags = 0
+ if not follow_symlinks:
+ flags |= AT_SYMLINK_NOFOLLOW
+ if effective_ids:
+ flags |= AT_EACCESS
+ error = c_faccessat(dir_fd, pathname, mode, flags)
+ return error == 0
+
+if HAVE_LINKAT:
+ c_linkat = external('linkat',
+ [rffi.INT, rffi.CCHARP, rffi.INT, rffi.CCHARP, rffi.INT], rffi.INT)
+
+ def linkat(src, dst, src_dir_fd=AT_FDCWD, dst_dir_fd=AT_FDCWD,
follow_symlinks=True):
+ """Thin wrapper around linkat(2) with an interface similar to
+ Python3's os.link()
+ """
+ if follow_symlinks:
+ flag = 0
+ else:
+ flag = AT_SYMLINK_NOFOLLOW
+ error = c_linkat(src_dir_fd, src, dst_dir_fd, dst, flag)
+ handle_posix_error('linkat', error)
+
+if HAVE_FUTIMENS:
+ pass
+
+if HAVE_UTIMENSAT:
+ pass
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