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Corinna Vinschen fa84aa4dd2 Cygwin: fix errno values set by readlinkat 
readlinkat(fd, "", ...) is supposed to return ENOENT per POSIX,
but Cygwin returns EBADF.

At the same time, we have to maintain the special feature of
glibc that readlinkat(fd, "", ...) operates on fd, if fd is pointing
at a symlink opened with O_PATH|O_NOFOLLOW.

And, while fixing that, readlinkat(fd, path, ...) *still* has to set errno
to EBADF, if fd is an invalid descriptor *and* path is a relative path.

This required to change the evaluation order in the helper function
gen_full_path_at.

Last but not least, in case of the aforementioned glibc-like special
handling for symlink descriptors, we have to make sure that errors from
gen_full_path_at are not spilled into that special handling.

Fixes: 6cc05784e1 ("Cygwin: readlinkat: allow pathname to be empty")
Reported-by: Bruno Haible <bruno@clisp.org>
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
 		2023-04-18 13:52:50 +02:00
..
DevDocs Cygwin: testsuite: Add x86_64 code to "dynamically load cygwin" test 2022-08-29 17:53:48 +01:00
fhandler Cygwin: pty: Fix reading CONIN$ when stdin is not a pty. 2023-04-14 11:22:33 +09:00
include Cygwin: replace regex with latest verbatim FreeBSD version 2023-03-16 11:12:08 +01:00
lib Cygwin: drop __stdcall usage 2022-08-04 20:54:09 +02:00
libc Cygwin: fnmatch: support collating symbols in [. .] brackets 2023-03-01 10:54:52 +01:00
linux-locale-helpers Cygwin: fetch-lc-def-codesets-from-linux: fix locale name handling 2023-02-26 20:14:54 +01:00
local_includes Allow deriving the current user's home directory via the HOME variable 2023-03-28 12:18:14 +02:00
math Cygwin: fix return value of ilogbl(NaN) 2023-04-18 13:43:06 +02:00
mm Cygwin: cygheap: fix fork error after heap has grown 2023-04-18 10:06:53 +02:00
regex Cygwin: regex: fix faulty check for valid range expression 2023-03-20 12:58:03 +01:00
release Cygwin: fix errno values set by readlinkat 2023-04-18 13:52:50 +02:00
scripts Cygwin: Run testsuite against the just-built DLL 2023-01-10 10:27:13 +00:00
sec Cygwin: get_posix_access: Make mode_t parameter mandatory 2023-02-09 21:58:44 +01:00
tzcode winsup: delete old _LIBC logic 2021-11-10 20:16:15 -05:00
x86_64 Cygwin: x86_64: import swab.S from NetBSD 2022-12-20 10:19:23 +01:00
Makefile.am Cygwin: Makefile.am: fix rule to create version from git describe 2023-02-15 15:04:16 +01:00
advapi32.cc Cygwin: drop all usages of WINAPI 2022-08-04 22:13:59 +02:00
aio.cc Cygwin: drop all usages of WINAPI 2022-08-04 22:13:59 +02:00
assert.cc
…
autoload.cc Cygwin: autoload: clean up arguments to LoadDllFunc* 2023-01-17 16:32:14 +01:00
automode.c
…
binmode.c
…
clock.cc Cygwin: drop wincap::has_precise_system_time 2022-12-04 14:01:41 +01:00
config.h.in
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create_posix_thread.cc Cygwin: add memory_layout.h 2022-10-28 16:26:53 +02:00
crt0.c Cygwin: drop 32 bit considerations in crt0 code 2022-05-16 18:17:06 +02:00
ctype.cc Cygwin: fully support KOI8-T codeset 2023-02-25 16:12:51 +01:00
cxx.cc
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cygthread.cc Cygwin: drop all usages of WINAPI 2022-08-04 22:13:59 +02:00
cygtls.cc Cygwin: tls_pathbuf: Use Windows heap 2022-08-23 12:09:44 +02:00
cygwait.cc Ensure nanosleep(2) never returns negative rem 2021-07-22 09:57:40 +02:00
cygwin.din Cygwin: reinstantiate exporting _alloca 2023-01-09 13:42:53 +01:00
cygwin.ldif
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cygwin.sc.in Cygwin: drop objcopy .gnu_debuglink juggle 2022-10-28 16:26:53 +02:00
cygxdr.cc
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dcrt0.cc Cygwin: cygheap: Initialize myself_pinfo before child_copy(). 2023-01-10 21:04:29 +09:00
debug.cc Cygwin: debugging: convert muto to SRWLOCK 2022-08-22 14:38:49 +02:00
devices.cc Cygwin: tape: tapes are character devices, not block devices 2023-01-21 18:25:56 +01:00
devices.in Cygwin: tape: tapes are character devices, not block devices 2023-01-21 18:25:56 +01:00
dir.cc change _COMPILING_NEWLIB to _LIBC 2021-11-15 19:32:23 -05:00
dlfcn.cc Cygwin: remove miscellaneous 32-bit code 2022-05-29 17:54:32 -04:00
dll_init.cc Cygwin: remove most occurrences of __stdcall and __cdecl 2022-06-06 12:00:45 -04:00
dtable.cc Cygwin: ctty: Remove old 'kludge' code. 2023-03-07 10:51:44 +09:00
environ.cc Cygwin: drop macro and code for CYGWIN_VERSION_DLL_MALLOC_ENV 2022-08-03 15:35:34 +02:00
errno.cc Cygwin: create sparse errmap array 2022-08-04 15:16:48 +02:00
exceptions.cc Cygwin: ctty: Replace ctty constant with more descriptive macros. 2023-03-07 10:51:29 +09:00
exec.cc Cygwin: rename __cygwin_environ and drop env redirection via cur_environ() 2022-07-28 22:00:40 +02:00
external.cc Cygwin: ctty: Replace ctty constant with more descriptive macros. 2023-03-07 10:51:29 +09:00
fcntl.cc Cygwin: simplify some function names 2022-05-29 17:45:52 -04:00
fenv.c
…
flock.cc Cygwin: flock: drop checking for artificial console handles 2022-12-04 14:01:41 +01:00
fork.cc Cygwin: fork: fix a potential hang in fork 2022-08-29 12:25:24 +02:00
forkable.cc Cygwin: unlink: drop unlink_nt/unlink_nt_shareable wrappers 2023-03-20 12:55:30 +01:00
gcrt0.c Revert "sys/types.h: Don't include sys/_stdint.h" 2022-05-04 15:08:44 +02:00
glob.cc Cygwin: glob: fix conversion from UTF-32 to multibyte 2023-03-03 18:19:17 +01:00
glob_pattern_p.cc
…
globals.cc Cygwin: convert __collate_range_cmp to __wcollate_range_cmp 2023-02-19 14:40:29 +01:00
gmon.c Cygwin: Zero out gmon header before use 2021-06-26 15:24:27 +01:00
grp.cc Cygwin: simplify some function names 2022-05-29 17:45:52 -04:00
hookapi.cc Cygwin: Fix previous attempt to drop i386 targets from hookapi 2022-07-28 16:38:01 +02:00
init.cc Cygwin: drop all usages of WINAPI 2022-08-04 22:13:59 +02:00
ioctl.cc
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ipc.cc Cygwin: simplify some function names 2022-05-29 17:45:52 -04:00
kernel32.cc Cygwin: drop all usages of WINAPI 2022-08-04 22:13:59 +02:00
ldap.cc Cygwin: drop all usages of WINAPI 2022-08-04 22:13:59 +02:00
libstdcxx_wrapper.cc Cygwin: remove miscellaneous 32-bit code 2022-05-29 17:54:32 -04:00
loadavg.cc
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lsearch.cc
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mcount.c
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miscfuncs.cc Cygwin: rename CygwinCreateThread to create_posix_thread 2022-08-10 18:06:28 +02:00
mktemp.cc Cygwin: simplify some function names 2022-05-29 17:45:52 -04:00
mount.cc Cygwin: fs_info::update: fix NTFS filesystem flags 2023-03-21 18:02:49 +01:00
msg.cc
…
net.cc Cygwin: net.cc: convert wsock_errmap into a simple array of error codes 2022-08-04 11:45:58 +02:00
netdb.cc
…
nfs.cc
…
nlsfuncs.cc Cygwin: locales: fix behaviour for @euro locales 2023-03-26 13:06:38 +02:00
ntea.cc Cygwin: remove most occurrences of __stdcall and __cdecl 2022-06-06 12:00:45 -04:00
passwd.cc Cygwin: simplify some function names 2022-05-29 17:45:52 -04:00
path.cc Cygwin: dirname: fix handling of leading slashes 2023-03-29 10:23:05 +02:00
pinfo.cc Cygwin: ctty: Replace ctty constant with more descriptive macros. 2023-03-07 10:51:29 +09:00
poll.cc Cygwin: poll: Fix a bug on inquiring same fd with different events. 2022-06-27 10:54:24 +09:00
posix_ipc.cc Cygwin: move POSIX semaphore API functions to posix_ipc.cc 2022-08-10 18:11:57 +02:00
posix_timer.cc Cygwin: posix_timer: fix formatting 2022-08-22 14:53:30 +02:00
profil.c Cygwin: drop all usages of WINAPI 2022-08-04 22:13:59 +02:00
pseudo-reloc.cc Cygwin: drop macro and code for CYGWIN_VERSION_USE_PSEUDO_RELOC_IN_DLL 2022-08-03 16:01:29 +02:00
quotactl.cc
…
random.cc Cygwin: add missing pragma 2022-12-07 21:18:24 +01:00
registry.cc
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resource.cc Cygwin: fix a few comments mentioning Windows 7 or 8 2022-12-04 14:01:41 +01:00
scandir.cc
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sched.cc Cygwin: drop support for systems not supporting processor groups 2021-10-29 18:19:45 +02:00
select.cc Cygwin: console: Make the console accessible from other terminals. 2022-12-22 21:05:31 +09:00
sem.cc
…
setlsapwd.cc
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shm.cc Cygwin: shm: Convert muto into SRWLOCK and avoid overlocking 2022-08-22 14:28:11 +02:00
signal.cc Cygwin: remove regparm.h 2022-05-29 17:45:52 -04:00
sigproc.cc Cygwin: /proc/<PID>/status: avoid crash computing signal info 2023-01-10 11:48:02 +01:00
smallprint.cc Cygwin: smallprint.cc: Drop HEAP_ZERO_MEMORY 2022-08-22 17:58:53 +02:00
spawn.cc Cygwin: ctty: Replace ctty constant with more descriptive macros. 2023-03-07 10:51:29 +09:00
strace.cc Cygwin: remove most occurrences of __stdcall and __cdecl 2022-06-06 12:00:45 -04:00
strfuncs.cc Cygwin: add support for GB18030 codeset 2023-03-16 18:25:09 +01:00
strsep.cc Cygwin: C++17: register keyword is deprecated 2021-08-26 22:14:11 +02:00
strsig.cc Cygwin: signals: drop accidental spaces from real-time signal names 2023-03-15 21:44:52 +01:00
sync.cc
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syscalls.cc Cygwin: fix errno values set by readlinkat 2023-04-18 13:52:50 +02:00
sysconf.cc Cygwin: remove miscellaneous 32-bit code 2022-05-29 17:54:32 -04:00
syslog.cc
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termios.cc Cygwin: drop macro and code for CYGWIN_VERSION_DLL_IS_OLD_TERMIOS 2022-08-03 15:35:29 +02:00
textmode.c
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textreadmode.c
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thread.cc Cygwin: move POSIX semaphore API functions to posix_ipc.cc 2022-08-10 18:11:57 +02:00
timerfd.cc Cygwin: drop all usages of WINAPI 2022-08-04 22:13:59 +02:00
times.cc Cygwin: drop wincap::has_precise_system_time 2022-12-04 14:01:41 +01:00
tls_pbuf.cc Cygwin: tls_pathbuf: Use Windows heap 2022-08-23 12:09:44 +02:00
tty.cc Cygwin: ctty: Replace ctty constant with more descriptive macros. 2023-03-07 10:51:29 +09:00
uinfo.cc Respect `db_home` setting even for SYSTEM/Microsoft accounts 2023-04-03 18:17:43 +02:00
uname.cc Cygwin: uname: fix building in non-git source dir 2022-12-07 22:22:38 +01:00
wait.cc
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wincap.cc Cygwin: wincap: make capability flags readonly 2023-01-12 10:34:32 +01:00
window.cc Cygwin: drop all usages of WINAPI 2022-08-04 22:13:59 +02:00
winf.cc
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winver.rc
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