From 07f1eda630517816bfa900e811963745a149e57c Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Fri, 8 Jun 2018 20:38:30 -0700
Subject: [PATCH] Add configure check for canonicalize_file_name() before use

Define canonicalize_file_name API if not provided by system C library
musl e.g. does not provide this API

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
Upstream-Status: Pending

 configure.ac                                |  2 ++
 src/kerneldevice/mm-kernel-device-generic.c | 18 ++++++++++++++++++
 2 files changed, 20 insertions(+)

Index: ModemManager-1.7.991/configure.ac
===================================================================
--- ModemManager-1.7.991.orig/configure.ac
+++ ModemManager-1.7.991/configure.ac
@@ -72,6 +72,8 @@ AC_SUBST(MM_GLIB_LT_CURRENT)
 AC_SUBST(MM_GLIB_LT_REVISION)
 AC_SUBST(MM_GLIB_LT_AGE)
 
+AC_CHECK_FUNCS([canonicalize_file_name])
+
 dnl-----------------------------------------------------------------------------
 dnl Documentation
 dnl
Index: ModemManager-1.7.991/src/kerneldevice/mm-kernel-device-generic.c
===================================================================
--- ModemManager-1.7.991.orig/src/kerneldevice/mm-kernel-device-generic.c
+++ ModemManager-1.7.991/src/kerneldevice/mm-kernel-device-generic.c
@@ -21,6 +21,7 @@
 #define _LIBMM_INSIDE_MM
 #include <libmm-glib.h>
 
+#include "config.h"
 #include "mm-kernel-device-generic.h"
 #include "mm-kernel-device-generic-rules.h"
 #include "mm-log.h"
@@ -100,6 +101,24 @@ read_sysfs_property_as_string (const gch
     return contents;
 }
 
+#ifndef HAVE_CANONICALIZE_FILE_NAME
+#include <limits.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+static char * canonicalize_file_name(const char *path)
+{
+   char buf[PATH_MAX] = { };
+
+   snprintf(buf, sizeof(buf) - 1, "%s", path);
+
+   if (!realpath(path, buf))
+       return NULL;
+
+   return strdup(buf);
+}
+#endif
+
 /*****************************************************************************/
 /* Load contents */