abspath: use strbuf_getcwd() to remember original working directory

Store the original working directory in a strbuf instead of in a
fixed-sized buffer, in order to be able to handle longer paths.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/abspath.c b/abspath.c
index ca33558a91c5259a793fc56b571fa683e16b134f..911e931cc07118b9a696bd6ae041485a8eae3c0a 100644 (file)
--- a/abspath.c
+++ b/abspath.c
@@ -41,7 +41,7 @@ static const char *real_path_internal(const char *path, int die_on_error)
         * here so that we can chdir() back to it at the end of the
         * function:
         */
-       char cwd[1024] = "";
+       struct strbuf cwd = STRBUF_INIT;
 
        int buf_index = 1;
 
@@ -80,7 +80,7 @@ static const char *real_path_internal(const char *path, int die_on_error)
                }
 
                if (*buf) {
-                       if (!*cwd && !getcwd(cwd, sizeof(cwd))) {
+                       if (!cwd.len && strbuf_getcwd(&cwd)) {
                                if (die_on_error)
                                        die_errno("Could not get current working directory");
                                else
@@ -142,8 +142,9 @@ static const char *real_path_internal(const char *path, int die_on_error)
        retval = buf;
 error_out:
        free(last_elem);
-       if (*cwd && chdir(cwd))
-               die_errno("Could not change back to '%s'", cwd);
+       if (cwd.len && chdir(cwd.buf))
+               die_errno("Could not change back to '%s'", cwd.buf);
+       strbuf_release(&cwd);
 
        return retval;
 }