curl/tests/libtest/sethostname.c

/*****************************************************************************
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 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
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 *
 */

#include <stdlib.h>
#include <string.h>

#define GETHOSTNAME_ENV_VAR "CURL_GETHOSTNAME"

/*
 * we force our own host name, in order to make some tests machine independent
 *
 * Since some systems think this prototype doesn't match the system provided
 * function, we AVOID including unistd.h or other headers that may include the
 * original prototype!
 */
int gethostname(char *name, size_t namelen)
{
  const char *force_hostname = getenv(GETHOSTNAME_ENV_VAR);
  if(force_hostname) {
    strncpy(name, force_hostname, namelen);
    return 0;
  }

  /* LD_PRELOAD used, but no hostname set, we'll just return a failure */
  return -1;
}