From a3ec215973c3653ebdeb81dcdd1274519c376a3d Mon Sep 17 00:00:00 2001 From: Lorry Tar Creator Date: Sun, 21 Aug 2016 05:23:24 +0000 Subject: diffutils-3.5 --- lib/xreadlink.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 lib/xreadlink.c (limited to 'lib/xreadlink.c') diff --git a/lib/xreadlink.c b/lib/xreadlink.c new file mode 100644 index 0000000..901f946 --- /dev/null +++ b/lib/xreadlink.c @@ -0,0 +1,44 @@ +/* xreadlink.c -- readlink wrapper to return the link name in malloc'd storage + + Copyright (C) 2001, 2003-2007, 2009-2016 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +/* Written by Jim Meyering + and Bruno Haible . */ + +#include + +/* Specification. */ +#include "xreadlink.h" + +#include + +#include "areadlink.h" +#include "xalloc.h" + +/* Call readlink to get the symbolic link value of FILENAME. + Return a pointer to that NUL-terminated string in malloc'd storage. + If readlink fails, return NULL and set errno. + If realloc fails, or if the link value is longer than SIZE_MAX :-), + give a diagnostic and exit. */ + +char * +xreadlink (char const *filename) +{ + char *result = areadlink (filename); + if (result == NULL && errno == ENOMEM) + xalloc_die (); + return result; +} -- cgit v1.2.1