Some systems do not fail as expected when fread et al. are called on
a directory stream. Replace fopen on such systems which will fail
when the supplied path is a directory.
Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
---
Makefile | 7 +++++++
compat/fopen.c | 26 ++++++++++++++++++++++++++
git-compat-util.h | 5 +++++
3 files changed, 38 insertions(+), 0 deletions(-)
create mode 100644 compat/fopen.c
diff --git a/Makefile b/Makefile
index 92341c4..debfc23 100644
--- a/Makefile
+++ b/Makefile
@@ -3,6 +3,9 @@ all::
# Define V=1 to have a more verbose compile.
#
+# Define FREAD_READS_DIRECTORIES if your are on a system which succeeds
+# when attempting to read from an fopen'ed directory.
+#
# Define NO_OPENSSL environment variable if you do not have OpenSSL.
# This also implies MOZILLA_SHA1.
#
@@ -618,6 +621,10 @@ endif
ifdef NO_C99_FORMAT
BASIC_CFLAGS += -DNO_C99_FORMAT
endif
+ifdef FREAD_READS_DIRECTORIES
+ COMPAT_CFLAGS += -DFREAD_READS_DIRECTORIES
+ COMPAT_OBJS += compat/fopen.o
+endif
ifdef NO_SYMLINK_HEAD
BASIC_CFLAGS += -DNO_SYMLINK_HEAD
endif
diff --git a/compat/fopen.c b/compat/fopen.c
new file mode 100644
index 0000000..ccb9e89
--- /dev/null
+++ b/compat/fopen.c
@@ -0,0 +1,26 @@
+#include "../git-compat-util.h"
+#undef fopen
+FILE *git_fopen(const char *path, const char *mode)
+{
+ FILE *fp;
+ struct stat st;
+
+ if (mode[0] == 'w' || mode[0] == 'a')
+ return fopen(path, mode);
+
+ if (!(fp = fopen(path, mode)))
+ return NULL;
+
+ if (fstat(fileno(fp), &st)) {
+ fclose(fp);
+ return NULL;
+ }
+
+ if (S_ISDIR(st.st_mode)) {
+ fclose(fp);
+ errno = EISDIR;
+ return NULL;
+ }
+
+ return fp;
+}
diff --git a/git-compat-util.h b/git-compat-util.h
index 4df90cb..46d5e93 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -204,6 +204,11 @@ void *gitmemmem(const void *haystack, size_t haystacklen,
const void *needle, size_t needlelen);
#endif
+#ifdef FREAD_READS_DIRECTORIES
+#define fopen(a,b) git_fopen(a,b)
+extern FILE *git_fopen(const char*, const char*);
+#endif
+
#ifdef __GLIBC_PREREQ
#if __GLIBC_PREREQ(2, 1)
#define HAVE_STRCHRNUL
--
1.5.4.26.g5ef4da
-
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