[PATCH v4 04/23] safe_create_leading_directories_const(): preserve errno
From: Michael Haggerty <hidden>
Date: 2017-01-06 16:23:33
Subsystem:
the rest · Maintainer:
Linus Torvalds
Some implementations of free() change errno (even thought they shouldn't): https://sourceware.org/bugzilla/show_bug.cgi?id=17924 So preserve the errno from safe_create_leading_directories() across the call to free(). Signed-off-by: Michael Haggerty <redacted> --- sha1_file.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/sha1_file.c b/sha1_file.c
index 1173071..10395e7 100644
--- a/sha1_file.c
+++ b/sha1_file.c@@ -166,10 +166,14 @@ enum scld_error safe_create_leading_directories(char *path) enum scld_error safe_create_leading_directories_const(const char *path) { + int save_errno; /* path points to cache entries, so xstrdup before messing with it */ char *buf = xstrdup(path); enum scld_error result = safe_create_leading_directories(buf); + + save_errno = errno; free(buf); + errno = save_errno; return result; }
--
2.9.3