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[PATCH 2/2] mingw_fopen: report ENOENT for invalid file names

From
Johannes Sixt <j6t@kdbg.org>
Date
May 29, 2017, 20:27 UTC
Message-ID
<bbdda290-d634-14c6-91ed-c8245ae50a54@kdbg.org>
In-Reply-To
<17b3d445-0cc7-2000-dc67-11fb53c7040b@kdbg.org>

On Windows, certain characters are prohibited in file names, most prominently the colon. When fopen() is called with such an invalid file name, the underlying Windows API actually reports a particular error, but since there is no suitable errno value, this error is translated to EINVAL. Detect the case and report ENOENT instead.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
---
  compat/mingw.c            | 2 ++
  t/t5580-clone-push-unc.sh | 2 +-
  2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/compat/mingw.c b/compat/mingw.c
index 62109cc4e6..ce6fe8f46b 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -423,6 +423,8 @@ FILE *mingw_fopen (const char *filename, const char 
*otype)
  		return NULL;
  	}
  	file = _wfopen(wfilename, wotype);
+	if (!file && GetLastError() == ERROR_INVALID_NAME)
+		errno = ENOENT;
  	if (file && hide && set_hidden_flag(wfilename, 1))
  		warning("could not mark '%s' as hidden.", filename);
  	return file;
diff --git a/t/t5580-clone-push-unc.sh b/t/t5580-clone-push-unc.sh
index fd719a209e..93ce99ba3c 100755
--- a/t/t5580-clone-push-unc.sh
+++ b/t/t5580-clone-push-unc.sh
@@ -8,7 +8,7 @@ if ! test_have_prereq MINGW; then
  	test_done
  fi

-test_expect_failure 'remote nick cannot contain backslashes' '
+test_expect_success 'remote nick cannot contain backslashes' '
  	BACKSLASHED="$(pwd | tr / \\\\)" &&
  	git ls-remote "$BACKSLASHED" >out 2>err &&
  	! grep "unable to access" err
-- 
2.13.0.55.g17b7d13330
Previous: Johannes SixtNext: Ævar Arnfjörð Bjarmason
Message 29 of 41 in “What's cooking in git.git (May 2017, #06; Mon, 22)”
  1. Junio C HamanoMay 22, 2017
  2. Jonathan NiederMay 22, 2017
  3. Junio C HamanoMay 23, 2017
  4. Jonathan NiederMay 23, 2017
  5. Junio C HamanoMay 23, 2017
  6. Duy NguyenMay 25, 2017
  7. Junio C HamanoMay 26, 2017
  8. 00/13 reporting unexpected errors after (f)openJunio C Hamano, May 26, 2017
  9. 01/13 git_fopen: fix a sparse 'not declared' warningJunio C Hamano, May 26, 2017
  10. 02/13 use xfopen() in more placesJunio C Hamano, May 26, 2017
  11. 03/13 clone: use xfopen() instead of fopen()Junio C Hamano, May 26, 2017
  12. 05/13 config.mak.uname: set FREAD_READS_DIRECTORIES for Darwin, tooJunio C Hamano, May 26, 2017
  13. Stefan BellerMay 30, 2017
  14. Junio C HamanoMay 30, 2017
  15. Stefan BellerMay 30, 2017
  16. 04/13 config.mak.uname: set FREAD_READS_DIRECTORIES for Linux and FreeBSDJunio C Hamano, May 26, 2017
  17. 06/13 wrapper.c: add and use warn_on_fopen_errors()Junio C Hamano, May 26, 2017
  18. 07/13 wrapper.c: add and use fopen_or_warn()Junio C Hamano, May 26, 2017
  19. 09/13 print errno when reporting a system call errorJunio C Hamano, May 26, 2017
  20. 10/13 rerere.c: move error_errno() closer to the source system callJunio C Hamano, May 26, 2017
  21. Stefan BellerMay 30, 2017
  22. 08/13 wrapper.c: make warn_on_inaccessible() staticJunio C Hamano, May 26, 2017
  23. 11/13 log: fix memory leak in open_next_file()Junio C Hamano, May 26, 2017
  24. 12/13 wrapper: factor out is_missing_file_error()Junio C Hamano, May 26, 2017
  25. 1/2 compat-util: is_missing_file_error()Junio C Hamano, May 30, 2017
  26. 2/2 treewide: use is_missing_file_error() where ENOENT and ENOTDIR are checkedJunio C Hamano, May 30, 2017
  27. 13/13 is_missing_file_error(): work around EINVAL on WindowsJunio C Hamano, May 26, 2017
  28. 1/2 mingw: verify that paths are not mistaken for remote nicknamesJohannes Sixt, May 29, 2017
  29. 2/2 mingw_fopen: report ENOENT for invalid file namesJohannes Sixt, May 29, 2017
  30. Ævar Arnfjörð BjarmasonMay 29, 2017
  31. Johannes SixtMay 29, 2017
  32. Ramsay JonesMay 29, 2017
  33. Junio C HamanoMay 30, 2017
  34. Ramsay JonesMay 30, 2017
  35. Junio C HamanoMay 29, 2017
  36. Junio C HamanoMay 30, 2017
  37. Johannes SixtMay 30, 2017
  38. Junio C HamanoMay 30, 2017
  39. Stefan BellerMay 30, 2017
  40. Junio C HamanoMay 30, 2017
  41. Stefan BellerMay 30, 2017

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