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-rw-r--r--git-compat-util.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/git-compat-util.h b/git-compat-util.h
index 8a4a3f8..8a3c680 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -1115,6 +1115,21 @@ struct tm *git_gmtime_r(const time_t *, struct tm *);
#define getc_unlocked(fh) getc(fh)
#endif
+/*
+ * Our code often opens a path to an optional file, to work on its
+ * contents when we can successfully open it. We can ignore a failure
+ * to open if such an optional file does not exist, but we do want to
+ * report a failure in opening for other reasons (e.g. we got an I/O
+ * error, or the file is there, but we lack the permission to open).
+ *
+ * Call this function after seeing an error from open() or fopen() to
+ * see if the errno indicates a missing file that we can safely ignore.
+ */
+static inline int is_missing_file_error(int errno_)
+{
+ return (errno_ == ENOENT || errno_ == ENOTDIR);
+}
+
extern int cmd_main(int, const char **);
#endif