Re: [libvirt] [PATCH] Add copy-on-write image support

> + > +/** > + * Return an absolute path corresponding to PATH, which is absolute or relative > + * to the directory containing BASE_FILE, or NULL on error > + */ > +static char *absolutePathFromBaseFile(const char *base_file, const char *path) > +{ > + size_t base_size, path_size; > + char *res, *p; > + > + if (*path == '/') > + return strdup(path); > + > + base_size = strlen(base_file) + 1; > + path_size = strlen(path) + 1; > + if (VIR_ALLOC_N(res, base_size - 1 + path_size) < 0) > + return NULL; > + memcpy(res, base_file, base_size); > + p = strrchr(res, '/'); > + if (p != NULL) > + p++; > + else > + p = res; > + memcpy(p, path, path_size); > + if (VIR_REALLOC_N(res, (p + path_size) - res) < 0) { > + /* Ignore failure */ > + } > + return res; > +} Seeems like we could just call libc 'realpath' function here ?