unpack-trees: remove redundant path search in verify_absent

diff --git a/abspath.c b/abspath.c
index 4f95a954d5e20e2d42549141ac23794f681559e1..0d561246e0a958d9a7284409b1900a82876eebf3 100644 (file)
--- a/abspath.c
+++ b/abspath.c
@@ -66,3 +66,39 @@ const char *make_absolute_path(const char *path)
 
        return buf;
 }
+
+static const char *get_pwd_cwd(void)
+{
+       static char cwd[PATH_MAX + 1];
+       char *pwd;
+       struct stat cwd_stat, pwd_stat;
+       if (getcwd(cwd, PATH_MAX) == NULL)
+               return NULL;
+       pwd = getenv("PWD");
+       if (pwd && strcmp(pwd, cwd)) {
+               stat(cwd, &cwd_stat);
+               if (!stat(pwd, &pwd_stat) &&
+                   pwd_stat.st_dev == cwd_stat.st_dev &&
+                   pwd_stat.st_ino == cwd_stat.st_ino) {
+                       strlcpy(cwd, pwd, PATH_MAX);
+               }
+       }
+       return cwd;
+}
+
+const char *make_nonrelative_path(const char *path)
+{
+       static char buf[PATH_MAX + 1];
+
+       if (is_absolute_path(path)) {
+               if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
+                       die("Too long path: %.*s", 60, path);
+       } else {
+               const char *cwd = get_pwd_cwd();
+               if (!cwd)
+                       die("Cannot determine the current working directory");
+               if (snprintf(buf, PATH_MAX, "%s/%s", cwd, path) >= PATH_MAX)
+                       die("Too long path: %.*s", 60, path);
+       }
+       return buf;
+}