use strlcpy & strlcat (#74) * refactor checkpubkeyperms() with safe BSD functions fix gcc8 warnings ``` svr-authpubkey.c: In function 'checkpubkeyperms': svr-authpubkey.c:427:2: warning: 'strncat' specified bound 5 equals source length [-Wstringop-overflow=] strncat(filename, "/.ssh", 5); /* strlen("/.ssh") == 5 */ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ svr-authpubkey.c:433:2: warning: 'strncat' specified bound 16 equals source length [-Wstringop-overflow=] strncat(filename, "/authorized_keys", 16); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ``` see https://www.sudo.ws/todd/papers/strlcpy.html * restore strlcpy in xstrdup see original https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/xmalloc.c?rev=1.16

#include <tomcrypt_test.h>

void run_cmd(int res, int line, char *file, char *cmd)
{
   if (res != CRYPT_OK) {
      fprintf(stderr, "%s (%d)\n%s:%d:%s\n", error_to_string(res), res, file, line, cmd);
      if (res != CRYPT_NOP) {
         exit(EXIT_FAILURE);
      }
   }
}

/* $Source$ */
/* $Revision$ */
/* $Date$ */