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-rw-r--r--compat/fopen.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/compat/fopen.c b/compat/fopen.c
new file mode 100644
index 0000000..107b3e8
--- /dev/null
+++ b/compat/fopen.c
@@ -0,0 +1,37 @@
+/*
+ * The order of the following two lines is important.
+ *
+ * SUPPRESS_FOPEN_REDEFINITION is defined before including git-compat-util.h
+ * to avoid the redefinition of fopen within git-compat-util.h. This is
+ * necessary since fopen is a macro on some platforms which may be set
+ * based on compiler options. For example, on AIX fopen is set to fopen64
+ * when _LARGE_FILES is defined. The previous technique of merely undefining
+ * fopen after including git-compat-util.h is inadequate in this case.
+ */
+#define SUPPRESS_FOPEN_REDEFINITION
+#include "../git-compat-util.h"
+
+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;
+}