[PATCH] px5g-mbedtls error check

[Peter Naulls]

In 22.03, px5-mbedtls isn't bothering to check if the output was opened:

--- a/package/utils/px5g-mbedtls/px5g-mbedtls.c
+++ b/package/utils/px5g-mbedtls/px5g-mbedtls.c
@@ -29,6 +29,7 @@
  #include <unistd.h>
  #include <fcntl.h>
  #include <stdbool.h>
+#include <errno.h>

  #include <mbedtls/bignum.h>
  #include <mbedtls/x509_crt.h>
@@ -70,6 +71,11 @@ static void write_file(const char *path, int len, bool pem)
         if (path)
                 f = fopen(path, "w");

+    if (!f) {
+               fprintf(stderr, "Failed to open output '%s': %s\n", path, 
strerror(errno));
+               exit(1);
+    }
+
         fwrite(buf_start, 1, len, f);
         fclose(f);
  }