https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=d30a5917a9c40aec18c2243dfc2848c616dca77a
commit d30a5917a9c40aec18c2243dfc2848c616dca77a Author: Corinna Vinschen <[email protected]> AuthorDate: Tue Apr 18 18:18:27 2023 +0200 Commit: Corinna Vinschen <[email protected]> CommitDate: Tue Apr 18 18:18:27 2023 +0200 Cygwin: align renameat2 to Linux behaviour In contrast to rename default behaviour, Linux' renameat2 returns -1 with errno set to EEXIST, if oldfile and newfile refer to the same file, and the RENAME_NOREPLACE flag is set. Follow suit, given this is a Linux-only function anyway. Fixes: f665b1cef30f ("cygwin: Implement renameat2") Reported-by: Bruno Haible <[email protected]> Signed-off-by: Corinna Vinschen <[email protected]> Diff: --- winsup/cygwin/release/3.4.7 | 4 ++++ winsup/cygwin/syscalls.cc | 18 +++++++++++++----- 2 files changed, 17 insertions(+), 5 deletions(-) diff --git a/winsup/cygwin/release/3.4.7 b/winsup/cygwin/release/3.4.7 index 7bc7d4a1ccdb..0e6922163aa3 100644 --- a/winsup/cygwin/release/3.4.7 +++ b/winsup/cygwin/release/3.4.7 @@ -21,3 +21,7 @@ Bug Fixes - Fix error handling in readlinkat. Addresses: https://cygwin.com/pipermail/cygwin/2023-April/253510.html + +- Fix return code and errno set by renameat2, if oldfile and newfile + refer to the same file, and the RENAME_NOREPLACE flag is set. + Addresses: https://cygwin.com/pipermail/cygwin/2023-April/253514.html diff --git a/winsup/cygwin/syscalls.cc b/winsup/cygwin/syscalls.cc index b109720568dc..73343ecc1f07 100644 --- a/winsup/cygwin/syscalls.cc +++ b/winsup/cygwin/syscalls.cc @@ -2108,6 +2108,14 @@ nt_path_has_executable_suffix (PUNICODE_STRING upath) return false; } +inline int +set_same_file_return (bool noreplace) +{ + if (!noreplace) + return 0; + set_errno (EEXIST); + return -1; +} /* If newpath names an existing file and the RENAME_NOREPLACE flag is specified, fail with EEXIST. Exception: Don't fail if the purpose of the rename is just to change the case of oldpath on a @@ -2286,7 +2294,7 @@ rename2 (const char *oldpath, const char *newpath, unsigned int at2flags) newpc.get_nt_native_path (), FALSE)) { - res = 0; + res = set_same_file_return (noreplace); __leave; } newpc.file_attributes (INVALID_FILE_ATTRIBUTES); @@ -2301,7 +2309,7 @@ rename2 (const char *oldpath, const char *newpath, unsigned int at2flags) if (newpc.get_nt_native_path ()->Length == oldpc.get_nt_native_path ()->Length) { - res = 0; + res = set_same_file_return (noreplace); __leave; } if (*(PWCHAR) ((PBYTE) newpc.get_nt_native_path ()->Buffer @@ -2321,7 +2329,7 @@ rename2 (const char *oldpath, const char *newpath, unsigned int at2flags) newpc.get_nt_native_path (), oldpc.objcaseinsensitive ())) { - res = 0; + res = set_same_file_return (noreplace); __leave; } } @@ -2350,7 +2358,7 @@ rename2 (const char *oldpath, const char *newpath, unsigned int at2flags) newpc.get_nt_native_path (), oldpc.objcaseinsensitive ())) { - res = 0; + res = set_same_file_return (noreplace); __leave; } } @@ -2571,7 +2579,7 @@ skip_pre_W10_checks: { debug_printf ("%s and %s are the same file", oldpath, newpath); NtClose (nfh); - res = 0; + res = set_same_file_return (noreplace); __leave; } NtClose (nfh);
