real_path(): properly handle nonexistent top-level paths

The change has two points: 1. Do not strip off a leading slash, because that erroneously turns an absolute path into a relative path. 2. Do not remove slashes from groups of multiple slashes; instead let chdir() handle them. It could be, for example, that it wants to leave leading double-slashes alone. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>

Michael Haggerty committed Sep 7, 2012 at 00:41 UTC f4c21e89d7c6b578140e90c02b40eccb51ab8428
2 files changed +2 -2
abspath.c
+1 -1
@@ -45,8 +45,8 @@ const char *real_path(const char *path)
45 if (!is_directory(buf)) {
46 char *last_slash = find_last_dir_sep(buf);
47 if (last_slash) {
48 - *last_slash = '\0';
48 last_elem = xstrdup(last_slash + 1);
49 + last_slash[1] = '\0';
50 } else {
51 last_elem = xstrdup(buf);
52 *buf = '\0';
t/t0060-path-utils.sh
+1 -1
@@ -148,7 +148,7 @@ test_expect_success 'real path rejects the empty string' '
148 test_must_fail test-path-utils real_path ""
149 '
150
151 -test_expect_failure POSIX 'real path works on absolute paths' '
151 +test_expect_success POSIX 'real path works on absolute paths' '
152 nopath="hopefully-absent-path" &&
153 test "/" = "$(test-path-utils real_path "/")" &&
154 test "/$nopath" = "$(test-path-utils real_path "/$nopath")" &&