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libuv-1.49.2/src/unix/core.c  view on Meta::CPAN

    if (buf == NULL)
      goto fail;

    ptr = strchr(buf, '=');
    if (ptr == NULL) {
      uv__free(buf);
      continue;
    }

    *ptr = '\0';

    envitem = &(*envitems)[cnt];
    envitem->name = buf;
    envitem->value = ptr + 1;

    cnt++;
  }

  *count = cnt;
  return 0;

fail:
  for (i = 0; i < cnt; i++) {
    envitem = &(*envitems)[cnt];
    uv__free(envitem->name);
  }
  uv__free(*envitems);

  *envitems = NULL;
  *count = 0;
  return UV_ENOMEM;
}


int uv_os_getenv(const char* name, char* buffer, size_t* size) {
  char* var;
  size_t len;

  if (name == NULL || buffer == NULL || size == NULL || *size == 0)
    return UV_EINVAL;

  var = getenv(name);

  if (var == NULL)
    return UV_ENOENT;

  len = strlen(var);

  if (len >= *size) {
    *size = len + 1;
    return UV_ENOBUFS;
  }

  memcpy(buffer, var, len + 1);
  *size = len;

  return 0;
}


int uv_os_setenv(const char* name, const char* value) {
  if (name == NULL || value == NULL)
    return UV_EINVAL;

  if (setenv(name, value, 1) != 0)
    return UV__ERR(errno);

  return 0;
}


int uv_os_unsetenv(const char* name) {
  if (name == NULL)
    return UV_EINVAL;

  if (unsetenv(name) != 0)
    return UV__ERR(errno);

  return 0;
}


int uv_os_gethostname(char* buffer, size_t* size) {
  /*
    On some platforms, if the input buffer is not large enough, gethostname()
    succeeds, but truncates the result. libuv can detect this and return ENOBUFS
    instead by creating a large enough buffer and comparing the hostname length
    to the size input.
  */
  char buf[UV_MAXHOSTNAMESIZE];
  size_t len;

  if (buffer == NULL || size == NULL || *size == 0)
    return UV_EINVAL;

  if (gethostname(buf, sizeof(buf)) != 0)
    return UV__ERR(errno);

  buf[sizeof(buf) - 1] = '\0'; /* Null terminate, just to be safe. */
  len = strlen(buf);

  if (len >= *size) {
    *size = len + 1;
    return UV_ENOBUFS;
  }

  memcpy(buffer, buf, len + 1);
  *size = len;
  return 0;
}


uv_os_fd_t uv_get_osfhandle(int fd) {
  return fd;
}

int uv_open_osfhandle(uv_os_fd_t os_fd) {
  return os_fd;
}

uv_pid_t uv_os_getpid(void) {
  return getpid();
}


uv_pid_t uv_os_getppid(void) {
  return getppid();
}

int uv_cpumask_size(void) {
#if UV__CPU_AFFINITY_SUPPORTED
  return CPU_SETSIZE;
#else
  return UV_ENOTSUP;
#endif
}