completion: add hack to enable file mode in bash < 4

diff --git a/path.c b/path.c
index d3d3f8b8ad75b9817df3014296aabc34b6a4eb14..04ff1487ed31685b6b3f7923f9bfbfc7217f70a0 100644 (file)
--- a/path.c
+++ b/path.c
@@ -1,19 +1,26 @@
 /*
- * I'm tired of doing "vsnprintf()" etc just to open a
- * file, so here's a "return static buffer with printf"
- * interface for paths.
- *
- * It's obviously not thread-safe. Sue me. But it's quite
- * useful for doing things like
- *
- *   f = open(mkpath("%s/%s.git", base, name), O_RDONLY);
- *
- * which is what it's designed for.
+ * Utilities for paths and pathnames
  */
 #include "cache.h"
 #include "strbuf.h"
 #include "string-list.h"
 
+#ifndef get_st_mode_bits
+/*
+ * The replacement lstat(2) we use on Cygwin is incomplete and
+ * may return wrong permission bits. Most of the time we do not care,
+ * but the callsites of this wrapper do care.
+ */
+int get_st_mode_bits(const char *path, int *mode)
+{
+       struct stat st;
+       if (lstat(path, &st) < 0)
+               return -1;
+       *mode = st.st_mode;
+       return 0;
+}
+#endif
+
 static char bad_path[] = "/bad-path/";
 
 static char *get_pathname(void)
@@ -389,28 +396,14 @@ const char *enter_repo(const char *path, int strict)
        return NULL;
 }
 
-int set_shared_perm(const char *path, int mode)
+static int calc_shared_perm(int mode)
 {
-       struct stat st;
-       int tweak, shared, orig_mode;
+       int tweak;
 
-       if (!shared_repository) {
-               if (mode)
-                       return chmod(path, mode & ~S_IFMT);
-               return 0;
-       }
-       if (!mode) {
-               if (lstat(path, &st) < 0)
-                       return -1;
-               mode = st.st_mode;
-               orig_mode = mode;
-       } else
-               orig_mode = 0;
        if (shared_repository < 0)
-               shared = -shared_repository;
+               tweak = -shared_repository;
        else
-               shared = shared_repository;
-       tweak = shared;
+               tweak = shared_repository;
 
        if (!(mode & S_IWUSR))
                tweak &= ~0222;
@@ -422,16 +415,28 @@ int set_shared_perm(const char *path, int mode)
        else
                mode |= tweak;
 
-       if (S_ISDIR(mode)) {
+       return mode;
+}
+
+
+int adjust_shared_perm(const char *path)
+{
+       int old_mode, new_mode;
+
+       if (!shared_repository)
+               return 0;
+       if (get_st_mode_bits(path, &old_mode) < 0)
+               return -1;
+
+       new_mode = calc_shared_perm(old_mode);
+       if (S_ISDIR(old_mode)) {
                /* Copy read bits to execute bits */
-               mode |= (shared & 0444) >> 2;
-               mode |= FORCE_DIR_SET_GID;
+               new_mode |= (new_mode & 0444) >> 2;
+               new_mode |= FORCE_DIR_SET_GID;
        }
 
-       if (((shared_repository < 0
-             ? (orig_mode & (FORCE_DIR_SET_GID | 0777))
-             : (orig_mode & mode)) != mode) &&
-           chmod(path, (mode & ~S_IFMT)) < 0)
+       if (((old_mode ^ new_mode) & ~S_IFMT) &&
+                       chmod(path, (new_mode & ~S_IFMT)) < 0)
                return -2;
        return 0;
 }