util.c

THIS IS HTTP CURL Example

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2008, Daniel Stenberg, <[e-mail]>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at http://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * $Id: util.c,v 1.18 2008-01-22 14:52:54 yangtse Exp $
 ***************************************************************************/
#include "setup.h" /* portability help from the lib directory */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <signal.h>
#include <sys/types.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef _XOPEN_SOURCE_EXTENDED
/* This define is "almost" required to build on HPUX 11 */
#include <arpa/inet.h>
#endif
#ifdef HAVE_NETDB_H
#include <netdb.h>
#endif
#ifdef HAVE_SYS_POLL_H
#include <sys/poll.h>
#elif defined(HAVE_POLL_H)
#include <poll.h>
#endif

#define ENABLE_CURLX_PRINTF
/* make the curlx header define all printf() functions to use the curlx_*
   versions instead */
#include "curlx.h" /* from the private lib dir */
#include "getpart.h"
#include "util.h"
#include "timeval.h"

#if defined(ENABLE_IPV6) && defined(__MINGW32__)
const struct in6_addr in6addr_any = {{ IN6ADDR_ANY_INIT }};
#endif

/* someone else must set this properly */
extern const char *serverlogfile;

void logmsg(const char *msg, ...)
{
  va_list ap;
  char buffer[512]; /* possible overflow if you pass in a huge string */
  FILE *logfp;
  int error;
  struct timeval tv;
  time_t sec;
  struct tm *now;
  char timebuf[20];

  if (!serverlogfile) {
    fprintf(stderr, "Error: serverlogfile not set\n");
    return;
  }

  tv = curlx_tvnow();
  sec = tv.tv_sec;
  now = localtime(&sec); /* not multithread safe but we don't care */

  snprintf(timebuf, sizeof(timebuf), "%02d:%02d:%02d.%06ld",
           now->tm_hour, now->tm_min, now->tm_sec, tv.tv_usec);

  va_start(ap, msg);
  vsprintf(buffer, msg, ap);
  va_end(ap);

  logfp = fopen(serverlogfile, "a");
  if(logfp) {
    fprintf(logfp, "%s %s\n", timebuf, buffer);
    fclose(logfp);
  }
  else {
    error = ERRNO;
    fprintf(stderr, "fopen() failed with error: %d %s\n",
            error, strerror(error));
    fprintf(stderr, "Error opening file: %s\n", serverlogfile);
    fprintf(stderr, "Msg not logged: %s %s\n", timebuf, buffer);
  }
}

#ifdef WIN32
/* use instead of perror() on generic windows */
void win32_perror (const char *msg)
{
  char buf[512];
  DWORD err = SOCKERRNO;

  if (!FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err,
                     LANG_NEUTRAL, buf, sizeof(buf), NULL))
     snprintf(buf, sizeof(buf), "Unknown error %lu (%#lx)", err, err);
  if (msg)
     fprintf(stderr, "%s: ", msg);
  fprintf(stderr, "%s\n", buf);
}
#endif  /* WIN32 */

#ifdef USE_WINSOCK
void win32_init(void)
{
  WORD wVersionRequested;
  WSADATA wsaData;
  int err;
  wVersionRequested = MAKEWORD(USE_WINSOCK, USE_WINSOCK);

  err = WSAStartup(wVersionRequested, &wsaData);

  if (err != 0) {
    perror("Winsock init failed");
    logmsg("Error initialising winsock -- aborting");
    exit(1);
  }

  if ( LOBYTE( wsaData.wVersion ) != USE_WINSOCK ||
       HIBYTE( wsaData.wVersion ) != USE_WINSOCK ) {

    WSACleanup();
    perror("Winsock init failed");
    logmsg("No suitable winsock.dll found -- aborting");
    exit(1);
  }
}

void win32_cleanup(void)
{
  WSACleanup();
}
#endif  /* USE_WINSOCK */

/* set by the main code to point to where the test dir is */
const char *path=".";

char *test2file(long testno)
{
  static char filename[256];
  snprintf(filename, sizeof(filename), TEST_DATA_PATH, path, testno);
  return filename;
}

void go_sleep(long ms)
{
#ifdef HAVE_POLL_FINE
  /* portable subsecond "sleep" */
  poll((void *)0, 0, (int)ms);
#else
  /* systems without poll() need other solutions */

#ifdef WIN32
  /* Windows offers a millisecond sleep */
  Sleep(ms);
#elif defined(MSDOS)
  delay(ms);
#else
  /* Other systems must use select() for this */
  struct timeval timeout;

  timeout.tv_sec = ms/1000;
  ms = ms%1000;
  timeout.tv_usec = ms * 1000;

  select(0, NULL,  NULL, NULL, &timeout);
#endif

#endif
}