tool_operate.c

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2013, Daniel Stenberg, <daniel@haxx.se>, 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.
 *
 ***************************************************************************/
#include "tool_setup.h"

#ifdef HAVE_FCNTL_H
#  include <fcntl.h>
#endif

#ifdef HAVE_UTIME_H
#  include <utime.h>
#elif defined(HAVE_SYS_UTIME_H)
#  include <sys/utime.h>
#endif

#ifdef HAVE_LOCALE_H
#  include <locale.h>
#endif

#ifdef HAVE_NETINET_TCP_H
#  include <netinet/tcp.h>
#endif

#include "rawstr.h"

#define ENABLE_CURLX_PRINTF
/* use our own printf() functions */
#include "curlx.h"

#include "tool_binmode.h"
#include "tool_cfgable.h"
#include "tool_cb_dbg.h"
#include "tool_cb_hdr.h"
#include "tool_cb_prg.h"
#include "tool_cb_rea.h"
#include "tool_cb_see.h"
#include "tool_cb_wrt.h"
#include "tool_dirhie.h"
#include "tool_doswin.h"
#include "tool_easysrc.h"
#include "tool_getparam.h"
#include "tool_helpers.h"
#include "tool_homedir.h"
#include "tool_libinfo.h"
#include "tool_main.h"
#include "tool_metalink.h"
#include "tool_msgs.h"
#include "tool_operate.h"
#include "tool_operhlp.h"
#include "tool_parsecfg.h"
#include "tool_setopt.h"
#include "tool_sleep.h"
#include "tool_urlglob.h"
#include "tool_util.h"
#include "tool_writeenv.h"
#include "tool_writeout.h"
#include "tool_xattr.h"
#include "tool_vms.h"

#include "memdebug.h" /* keep this as LAST include */

#define CURLseparator  "--_curl_--"

#ifndef O_BINARY
/* since O_BINARY as used in bitmasks, setting it to zero makes it usable in
   source code but yet it doesn't ruin anything */
#  define O_BINARY 0
#endif

#define CURL_CA_CERT_ERRORMSG1                                              \
  "More details here: http://curl.haxx.se/docs/sslcerts.html\n\n"           \
  "curl performs SSL certificate verification by default, "                 \
  "using a \"bundle\"\n"                                                    \
  " of Certificate Authority (CA) public keys (CA certs). If the default\n" \
  " bundle file isn't adequate, you can specify an alternate file\n"        \
  " using the --cacert option.\n"

#define CURL_CA_CERT_ERRORMSG2                                              \
  "If this HTTPS server uses a certificate signed by a CA represented in\n" \
  " the bundle, the certificate verification probably failed due to a\n"    \
  " problem with the certificate (it might be expired, or the name might\n" \
  " not match the domain name in the URL).\n"                               \
  "If you'd like to turn off curl's verification of the certificate, use\n" \
  " the -k (or --insecure) option.\n"

static int is_fatal_error(int code)
{
  switch(code) {
  /* TODO: Should CURLE_SSL_CACERT be included as critical error ? */
  case CURLE_FAILED_INIT:
  case CURLE_OUT_OF_MEMORY:
  case CURLE_UNKNOWN_OPTION:
  case CURLE_FUNCTION_NOT_FOUND:
  case CURLE_BAD_FUNCTION_ARGUMENT:
    /* critical error */
    return 1;
  default:
    break;
  }
  /* no error or not critical */
  return 0;
}

int operate(struct Configurable *config, int argc, argv_item_t argv[])
{
  char errorbuffer[CURL_ERROR_SIZE];
  struct ProgressData progressbar;
  struct getout *urlnode;

  struct HdrCbData hdrcbdata;
  struct OutStruct heads;

  metalinkfile *mlfile_last = NULL;

  CURL *curl = NULL;
  char *httpgetfields = NULL;

  bool stillflags;
  int res = 0;
  int i;

  bool orig_noprogress;
  bool orig_isatty;

  errorbuffer[0] = '\0';
  /* default headers output stream is stdout */
  memset(&hdrcbdata, 0, sizeof(struct HdrCbData));
  memset(&heads, 0, sizeof(struct OutStruct));
  heads.stream = stdout;
  heads.config = config;

  memory_tracking_init();

  /*
  ** Initialize curl library - do not call any libcurl functions before
  ** this point. Note that the memory_tracking_init() magic above is an
  ** exception, but then that's not part of the official public API.
  */
  if(main_init() != CURLE_OK) {
    helpf(config->errors, "error initializing curl library\n");
    return CURLE_FAILED_INIT;
  }

  /* Get libcurl info right away */
  if(get_libcurl_info() != CURLE_OK) {
    helpf(config->errors, "error retrieving curl library information\n");
    main_free();
    return CURLE_FAILED_INIT;
  }

  /* Get a curl handle to use for all forthcoming curl transfers */
  curl = curl_easy_init();
  if(!curl) {
    helpf(config->errors, "error initializing curl easy handle\n");
    main_free();
    return CURLE_FAILED_INIT;
  }
  config->easy = curl;

  /*
  ** Beyond this point no return'ing from this function allowed.
  ** Jump to label 'quit_curl' in order to abandon this function
  ** from outside of nested loops further down below.
  */

  /* setup proper locale from environment */
#ifdef HAVE_SETLOCALE
  setlocale(LC_ALL, "");
#endif

  /* inits */
  config->postfieldsize = -1;
  config->showerror = -1; /* will show errors */
  config->use_httpget = FALSE;
  config->create_dirs = FALSE;
  config->maxredirs = DEFAULT_MAXREDIRS;
  config->proto = CURLPROTO_ALL; /* FIXME: better to read from library */
  config->proto_present = FALSE;
  config->proto_redir =
    CURLPROTO_ALL & ~(CURLPROTO_FILE|CURLPROTO_SCP); /* not FILE or SCP */
  config->proto_redir_present = FALSE;

  if((argc > 1) &&
     (!curlx_strnequal("--", argv[1], 2) && (argv[1][0] == '-')) &&
     strchr(argv[1], 'q')) {
    /*
     * The first flag, that is not a verbose name, but a shortname
     * and it includes the 'q' flag!
     */
    ;
  }
  else {
    parseconfig(NULL, config); /* ignore possible failure */
  }

  if((argc < 2)  && !config->url_list) {
    helpf(config->errors, NULL);
    res = CURLE_FAILED_INIT;
    goto quit_curl;
  }

  /* Parse options */
  for(i = 1, stillflags = TRUE; i < argc; i++) {
    if(stillflags &&
       ('-' == argv[i][0])) {
      char *nextarg;
      bool passarg;
      char *orig_opt = argv[i];

      char *flag = argv[i];

      if(curlx_strequal("--", argv[i]))
        /* this indicates the end of the flags and thus enables the
           following (URL) argument to start with -. */
        stillflags = FALSE;
      else {
        nextarg = (i < (argc-1)) ? argv[i+1] : NULL;

        res = getparameter(flag, nextarg, &passarg, config);
        if(res) {
          int retval = CURLE_OK;
          if(res != PARAM_HELP_REQUESTED) {
            const char *reason = param2text(res);
            helpf(config->errors, "option %s: %s\n", orig_opt, reason);
            retval = CURLE_FAILED_INIT;
          }
          res = retval;
          goto quit_curl;
        }

        if(passarg) /* we're supposed to skip this */
          i++;
      }
    }
    else {
      bool used;
      /* just add the URL please */
      res = getparameter((char *)"--url", argv[i], &used, config);
      if(res)
        goto quit_curl;
    }
  }

  if((!config->url_list || !config->url_list->url) && !config->list_engines) {
    helpf(config->errors, "no URL specified!\n");
    res = CURLE_FAILED_INIT;
    goto quit_curl;
  }

  if(!config->useragent)
    config->useragent = my_useragent();
  if(!config->useragent) {
    helpf(config->errors, "out of memory\n");
    res = CURLE_OUT_OF_MEMORY;
    goto quit_curl;
  }

  /* On WIN32 we can't set the path to curl-ca-bundle.crt
   * at compile time. So we look here for the file in two ways:
   * 1: look at the environment variable CURL_CA_BUNDLE for a path
   * 2: if #1 isn't found, use the windows API function SearchPath()
   *    to find it along the app's path (includes app's dir and CWD)
   *
   * We support the environment variable thing for non-Windows platforms
   * too. Just for the sake of it.
   */
  if(!config->cacert &&
     !config->capath &&
     !config->insecure_ok) {
    char *env;
    env = curlx_getenv("CURL_CA_BUNDLE");
    if(env) {
      config->cacert = strdup(env);
      if(!config->cacert) {
        curl_free(env);
        helpf(config->errors, "out of memory\n");
        res = CURLE_OUT_OF_MEMORY;
        goto quit_curl;
      }
    }
    else {
      env = curlx_getenv("SSL_CERT_DIR");
      if(env) {
        config->capath = strdup(env);
        if(!config->capath) {
          curl_free(env);
          helpf(config->errors, "out of memory\n");
          res = CURLE_OUT_OF_MEMORY;
          goto quit_curl;
        }
      }
      else {
        env = curlx_getenv("SSL_CERT_FILE");
        if(env) {
          config->cacert = strdup(env);
          if(!config->cacert) {
            curl_free(env);
            helpf(config->errors, "out of memory\n");
            res = CURLE_OUT_OF_MEMORY;
            goto quit_curl;
          }
        }
      }
    }

    if(env)
      curl_free(env);
#ifdef WIN32
    else {
      res = FindWin32CACert(config, "curl-ca-bundle.crt");
      if(res)
        goto quit_curl;
    }
#endif
  }

  if(config->postfields) {
    if(config->use_httpget) {
      /* Use the postfields data for a http get */
      httpgetfields = strdup(config->postfields);
      Curl_safefree(config->postfields);
      if(!httpgetfields) {
        helpf(config->errors, "out of memory\n");
        res = CURLE_OUT_OF_MEMORY;
        goto quit_curl;
      }
      if(SetHTTPrequest(config,
                        (config->no_body?HTTPREQ_HEAD:HTTPREQ_GET),
                        &config->httpreq)) {
        res = PARAM_BAD_USE;
        goto quit_curl;
      }
    }
    else {
      if(SetHTTPrequest(config, HTTPREQ_SIMPLEPOST, &config->httpreq)) {
        res = PARAM_BAD_USE;
        goto quit_curl;
      }
    }
  }

#ifndef CURL_DISABLE_LIBCURL_OPTION
  res = easysrc_init();
  if(res) {
    helpf(config->errors, "out of memory\n");
    goto quit_curl;
  }
#endif

  if(config->list_engines) {
    struct curl_slist *engines = NULL;
    curl_easy_getinfo(curl, CURLINFO_SSL_ENGINES, &engines);
    list_engines(engines);
    curl_slist_free_all(engines);
    res = CURLE_OK;
    goto quit_curl;
  }

  /* Single header file for all URLs */
  if(config->headerfile) {
    /* open file for output: */
    if(!curlx_strequal(config->headerfile, "-")) {
      FILE *newfile = fopen(config->headerfile, "wb");
      if(!newfile) {
        warnf(config, "Failed to open %s\n", config->headerfile);
        res = CURLE_WRITE_ERROR;
        goto quit_curl;
      }
      else {
        heads.filename = config->headerfile;
        heads.s_isreg = TRUE;
        heads.fopened = TRUE;
        heads.stream = newfile;
      }
    }
  }

  /* save the values of noprogress and isatty to restore them later on */
  orig_noprogress = config->noprogress;
  orig_isatty = config->isatty;

  /*
  ** Nested loops start here.
  */

  /* loop through the list of given URLs */

  for(urlnode = config->url_list; urlnode; urlnode = urlnode->next) {

    int up; /* upload file counter within a single upload glob */
    char *infiles; /* might be a glob pattern */
    char *outfiles;
    int infilenum;
    URLGlob *inglob;

    int metalink = 0; /* nonzero for metalink download. */
    metalinkfile *mlfile;
    metalink_resource *mlres;

    outfiles = NULL;
    infilenum = 1;
    inglob = NULL;

    if(urlnode->flags & GETOUT_METALINK) {
      metalink = 1;
      if(mlfile_last == NULL) {
        mlfile_last = config->metalinkfile_list;
      }
      mlfile = mlfile_last;
      mlfile_last = mlfile_last->next;
      mlres = mlfile->resource;
    }
    else {
      mlfile = NULL;
      mlres = NULL;
    }

    /* urlnode->url is the full URL (it might be NULL) */

    if(!urlnode->url) {
      /* This node has no URL. Free node data without destroying the
         node itself nor modifying next pointer and continue to next */
      Curl_safefree(urlnode->outfile);
      Curl_safefree(urlnode->infile);
      urlnode->flags = 0;
      continue; /* next URL please */
    }

    /* save outfile pattern before expansion */
    if(urlnode->outfile) {
      outfiles = strdup(urlnode->outfile);
      if(!outfiles) {
        helpf(config->errors, "out of memory\n");
        res = CURLE_OUT_OF_MEMORY;
        break;
      }
    }

    infiles = urlnode->infile;

    if(!config->globoff && infiles) {
      /* Unless explicitly shut off */
      res = glob_url(&inglob, infiles, &infilenum,
                     config->showerror?config->errors:NULL);
      if(res) {
        Curl_safefree(outfiles);
        break;
      }
    }

    /* Here's the loop for uploading multiple files within the same
       single globbed string. If no upload, we enter the loop once anyway. */
    for(up = 0 ; up < infilenum; up++) {

      char *uploadfile; /* a single file, never a glob */
      int separator;
      URLGlob *urls;
      int urlnum;

      uploadfile = NULL;
      urls = NULL;
      urlnum = 0;

      if(!up && !infiles)
        Curl_nop_stmt;
      else {
        if(inglob) {
          res = glob_next_url(&uploadfile, inglob);
          if(res == CURLE_OUT_OF_MEMORY)
            helpf(config->errors, "out of memory\n");
        }
        else if(!up) {
          uploadfile = strdup(infiles);
          if(!uploadfile) {
            helpf(config->errors, "out of memory\n");
            res = CURLE_OUT_OF_MEMORY;
          }
        }
        else
          uploadfile = NULL;
        if(!uploadfile)
          break;
      }

      if(metalink) {
        /* For Metalink download, we don't use glob. Instead we use
           the number of resources as urlnum. */
        urlnum = count_next_metalink_resource(mlfile);
      }
      else
      if(!config->globoff) {
        /* Unless explicitly shut off, we expand '{...}' and '[...]'
           expressions and return total number of URLs in pattern set */
        res = glob_url(&urls, urlnode->url, &urlnum,
                       config->showerror?config->errors:NULL);
        if(res) {
          Curl_safefree(uploadfile);
          break;
        }
      }
      else
        urlnum = 1; /* without globbing, this is a single URL */

      /* if multiple files extracted to stdout, insert separators! */
      separator= ((!outfiles || curlx_strequal(outfiles, "-")) && urlnum > 1);

      /* Here's looping around each globbed URL */
      for(i = 0 ; i < urlnum; i++) {

        int infd;
        bool infdopen;
        char *outfile;
        struct OutStruct outs;
        struct InStruct input;
        struct timeval retrystart;
        curl_off_t uploadfilesize;
        long retry_numretries;
        long retry_sleep_default;
        long retry_sleep;
        char *this_url = NULL;
        int metalink_next_res = 0;

        outfile = NULL;
        infdopen = FALSE;
        infd = STDIN_FILENO;
        uploadfilesize = -1; /* -1 means unknown */

        /* default output stream is stdout */
        memset(&outs, 0, sizeof(struct OutStruct));
        outs.stream = stdout;
        outs.config = config;

        if(metalink) {
          /* For Metalink download, use name in Metalink file as
             filename. */
          outfile = strdup(mlfile->filename);
          if(!outfile) {
            res = CURLE_OUT_OF_MEMORY;
            goto show_error;
          }
          this_url = strdup(mlres->url);
          if(!this_url) {
            res = CURLE_OUT_OF_MEMORY;
            goto show_error;
          }
        }
        else {
          if(urls) {
            res = glob_next_url(&this_url, urls);
            if(res)
              goto show_error;
          }
          else if(!i) {
            this_url = strdup(urlnode->url);
            if(!this_url) {
              res = CURLE_OUT_OF_MEMORY;
              goto show_error;
            }
          }
          else
            this_url = NULL;
          if(!this_url)
            break;

          if(outfiles) {
            outfile = strdup(outfiles);
            if(!outfile) {
              res = CURLE_OUT_OF_MEMORY;
              goto show_error;
            }
          }
        }

        if(((urlnode->flags&GETOUT_USEREMOTE) ||
            (outfile && !curlx_strequal("-", outfile))) &&
           (metalink || !config->use_metalink)) {

          /*
           * We have specified a file name to store the result in, or we have
           * decided we want to use the remote file name.
           */

          if(!outfile) {
            /* extract the file name from the URL */
            res = get_url_file_name(&outfile, this_url);
            if(res)
              goto show_error;
            if((!outfile || !*outfile) && !config->content_disposition) {
              helpf(config->errors, "Remote file name has no length!\n");
              res = CURLE_WRITE_ERROR;
              goto quit_urls;
            }
#if defined(MSDOS) || defined(WIN32)
            /* For DOS and WIN32, we do some major replacing of
               bad characters in the file name before using it */
            outfile = sanitize_dos_name(outfile);
            if(!outfile) {
              res = CURLE_OUT_OF_MEMORY;
              goto show_error;
            }
#endif /* MSDOS || WIN32 */
          }
          else if(urls) {
            /* fill '#1' ... '#9' terms from URL pattern */
            char *storefile = outfile;
            res = glob_match_url(&outfile, storefile, urls);
            Curl_safefree(storefile);
            if(res) {
              /* bad globbing */
              warnf(config, "bad output glob!\n");
              goto quit_urls;
            }
          }

          /* Create the directory hierarchy, if not pre-existent to a multiple
             file output call */

          if(config->create_dirs || metalink) {
            res = create_dir_hierarchy(outfile, config->errors);
            /* create_dir_hierarchy shows error upon CURLE_WRITE_ERROR */
            if(res == CURLE_WRITE_ERROR)
              goto quit_urls;
            if(res) {
              goto show_error;
            }
          }

          if((urlnode->flags & GETOUT_USEREMOTE)
             && config->content_disposition) {
            /* Our header callback MIGHT set the filename */
            DEBUGASSERT(!outs.filename);
          }

          if(config->resume_from_current) {
            /* We're told to continue from where we are now. Get the size
               of the file as it is now and open it for append instead */
            struct_stat fileinfo;
            /* VMS -- Danger, the filesize is only valid for stream files */
            if(0 == stat(outfile, &fileinfo))
              /* set offset to current file size: */
              config->resume_from = fileinfo.st_size;
            else
              /* let offset be 0 */
              config->resume_from = 0;
          }

          if(config->resume_from) {
            /* open file for output: */
            FILE *file = fopen(outfile, config->resume_from?"ab":"wb");
            if(!file) {
              helpf(config->errors, "Can't open '%s'!\n", outfile);
              res = CURLE_WRITE_ERROR;
              goto quit_urls;
            }
            outs.fopened = TRUE;
            outs.stream = file;
            outs.init = config->resume_from;
          }
          else {
            outs.stream = NULL; /* open when needed */
          }
          outs.filename = outfile;
          outs.s_isreg = TRUE;
        }

        if(uploadfile && !stdin_upload(uploadfile)) {
          /*
           * We have specified a file to upload and it isn't "-".
           */
          struct_stat fileinfo;

          this_url = add_file_name_to_url(curl, this_url, uploadfile);
          if(!this_url) {
            res = CURLE_OUT_OF_MEMORY;
            goto show_error;
          }
          /* VMS Note:
           *
           * Reading binary from files can be a problem...  Only FIXED, VAR
           * etc WITHOUT implied CC will work Others need a \n appended to a
           * line
           *
           * - Stat gives a size but this is UNRELIABLE in VMS As a f.e. a
           * fixed file with implied CC needs to have a byte added for every
           * record processed, this can by derived from Filesize & recordsize
           * for VARiable record files the records need to be counted!  for
           * every record add 1 for linefeed and subtract 2 for the record
           * header for VARIABLE header files only the bare record data needs
           * to be considered with one appended if implied CC
           */

          infd = open(uploadfile, O_RDONLY | O_BINARY);
          if((infd == -1) || fstat(infd, &fileinfo)) {
            helpf(config->errors, "Can't open '%s'!\n", uploadfile);
            if(infd != -1) {
              close(infd);
              infd = STDIN_FILENO;
            }
            res = CURLE_READ_ERROR;
            goto quit_urls;
          }
          infdopen = TRUE;

          /* we ignore file size for char/block devices, sockets, etc. */
          if(S_ISREG(fileinfo.st_mode))
            uploadfilesize = fileinfo.st_size;

        }
        else if(uploadfile && stdin_upload(uploadfile)) {
          /* count to see if there are more than one auth bit set
             in the authtype field */
          int authbits = 0;
          int bitcheck = 0;
          while(bitcheck < 32) {
            if(config->authtype & (1UL << bitcheck++)) {
              authbits++;
              if(authbits > 1) {
                /* more than one, we're done! */
                break;
              }
            }
          }

          /*
           * If the user has also selected --anyauth or --proxy-anyauth
           * we should warn him/her.
           */
          if(config->proxyanyauth || (authbits>1)) {
            warnf(config,
                  "Using --anyauth or --proxy-anyauth with upload from stdin"
                  " involves a big risk of it not working. Use a temporary"
                  " file or a fixed auth type instead!\n");
          }

          DEBUGASSERT(infdopen == FALSE);
          DEBUGASSERT(infd == STDIN_FILENO);

          set_binmode(stdin);
          if(curlx_strequal(uploadfile, ".")) {
            if(curlx_nonblock((curl_socket_t)infd, TRUE) < 0)
              warnf(config,
                    "fcntl failed on fd=%d: %s\n", infd, strerror(errno));
          }
        }

        if(uploadfile && config->resume_from_current)
          config->resume_from = -1; /* -1 will then force get-it-yourself */

        if(output_expected(this_url, uploadfile)
           && outs.stream && isatty(fileno(outs.stream)))
          /* we send the output to a tty, therefore we switch off the progress
             meter */
          config->noprogress = config->isatty = TRUE;
        else {
          /* progress meter is per download, so restore config
             values */
          config->noprogress = orig_noprogress;
          config->isatty = orig_isatty;
        }

        if(urlnum > 1 && !(config->mute)) {
          fprintf(config->errors, "\n[%d/%d]: %s --> %s\n",
                  i+1, urlnum, this_url, outfile ? outfile : "<stdout>");
          if(separator)
            printf("%s%s\n", CURLseparator, this_url);
        }
        if(httpgetfields) {
          char *urlbuffer;
          /* Find out whether the url contains a file name */
          const char *pc = strstr(this_url, "://");
          char sep = '?';
          if(pc)
            pc += 3;
          else
            pc = this_url;

          pc = strrchr(pc, '/'); /* check for a slash */

          if(pc) {
            /* there is a slash present in the URL */

            if(strchr(pc, '?'))
              /* Ouch, there's already a question mark in the URL string, we
                 then append the data with an ampersand separator instead! */
              sep='&';
          }
          /*
           * Then append ? followed by the get fields to the url.
           */
          if(pc)
            urlbuffer = aprintf("%s%c%s", this_url, sep, httpgetfields);
          else
            /* Append  / before the ? to create a well-formed url
               if the url contains a hostname only
            */
            urlbuffer = aprintf("%s/?%s", this_url, httpgetfields);

          if(!urlbuffer) {
            res = CURLE_OUT_OF_MEMORY;
            goto show_error;
          }

          Curl_safefree(this_url); /* free previous URL */
          this_url = urlbuffer; /* use our new URL instead! */
        }

        if(!config->errors)
          config->errors = stderr;

        if((!outfile || !strcmp(outfile, "-")) && !config->use_ascii) {
          /* We get the output to stdout and we have not got the ASCII/text
             flag, then set stdout to be binary */
          set_binmode(stdout);
        }

        if(config->tcp_nodelay)
          my_setopt(curl, CURLOPT_TCP_NODELAY, 1L);

        /* where to store */
        my_setopt(curl, CURLOPT_WRITEDATA, &outs);
        if(metalink || !config->use_metalink)
          /* what call to write */
          my_setopt(curl, CURLOPT_WRITEFUNCTION, tool_write_cb);
#ifdef USE_METALINK
        else
          /* Set Metalink specific write callback function to parse
             XML data progressively. */
          my_setopt(curl, CURLOPT_WRITEFUNCTION, metalink_write_cb);
#endif /* USE_METALINK */

        /* for uploads */
        input.fd = infd;
        input.config = config;
        /* Note that if CURLOPT_READFUNCTION is fread (the default), then
         * lib/telnet.c will Curl_poll() on the input file descriptor
         * rather then calling the READFUNCTION at regular intervals.
         * The circumstances in which it is preferable to enable this
         * behaviour, by omitting to set the READFUNCTION & READDATA options,
         * have not been determined.
         */
        my_setopt(curl, CURLOPT_READDATA, &input);
        /* what call to read */
        my_setopt(curl, CURLOPT_READFUNCTION, tool_read_cb);

        /* in 7.18.0, the CURLOPT_SEEKFUNCTION/DATA pair is taking over what
           CURLOPT_IOCTLFUNCTION/DATA pair previously provided for seeking */
        my_setopt(curl, CURLOPT_SEEKDATA, &input);
        my_setopt(curl, CURLOPT_SEEKFUNCTION, tool_seek_cb);

        if(config->recvpersecond)
          /* tell libcurl to use a smaller sized buffer as it allows us to
             make better sleeps! 7.9.9 stuff! */
          my_setopt(curl, CURLOPT_BUFFERSIZE, (long)config->recvpersecond);

        /* size of uploaded file: */
        if(uploadfilesize != -1)
          my_setopt(curl, CURLOPT_INFILESIZE_LARGE, uploadfilesize);
        my_setopt_str(curl, CURLOPT_URL, this_url);     /* what to fetch */
        my_setopt(curl, CURLOPT_NOPROGRESS, config->noprogress?1L:0L);
        if(config->no_body) {
          my_setopt(curl, CURLOPT_NOBODY, 1L);
          my_setopt(curl, CURLOPT_HEADER, 1L);
        }
        /* If --metalink is used, we ignore --include (headers in
           output) option because mixing headers to the body will
           confuse XML parser and/or hash check will fail. */
        else if(!config->use_metalink)
          my_setopt(curl, CURLOPT_HEADER, config->include_headers?1L:0L);

#if !defined(CURL_DISABLE_PROXY)
        {
          /* TODO: Make this a run-time check instead of compile-time one. */

          my_setopt_str(curl, CURLOPT_PROXY, config->proxy);
          my_setopt_str(curl, CURLOPT_PROXYUSERPWD, config->proxyuserpwd);

          /* new in libcurl 7.3 */
          my_setopt(curl, CURLOPT_HTTPPROXYTUNNEL, config->proxytunnel?1L:0L);

          /* new in libcurl 7.5 */
          if(config->proxy)
            my_setopt_enum(curl, CURLOPT_PROXYTYPE, (long)config->proxyver);

          /* new in libcurl 7.10 */
          if(config->socksproxy) {
            my_setopt_str(curl, CURLOPT_PROXY, config->socksproxy);
            my_setopt_enum(curl, CURLOPT_PROXYTYPE, (long)config->socksver);
          }

          /* new in libcurl 7.10.6 */
          if(config->proxyanyauth)
            my_setopt_bitmask(curl, CURLOPT_PROXYAUTH,
                              (long)CURLAUTH_ANY);
          else if(config->proxynegotiate)
            my_setopt_bitmask(curl, CURLOPT_PROXYAUTH,
                              (long)CURLAUTH_GSSNEGOTIATE);
          else if(config->proxyntlm)
            my_setopt_bitmask(curl, CURLOPT_PROXYAUTH,
                              (long)CURLAUTH_NTLM);
          else if(config->proxydigest)
            my_setopt_bitmask(curl, CURLOPT_PROXYAUTH,
                              (long)CURLAUTH_DIGEST);
          else if(config->proxybasic)
            my_setopt_bitmask(curl, CURLOPT_PROXYAUTH,
                              (long)CURLAUTH_BASIC);

          /* new in libcurl 7.19.4 */
          my_setopt(curl, CURLOPT_NOPROXY, config->noproxy);
        }
#endif

        my_setopt(curl, CURLOPT_FAILONERROR, config->failonerror?1L:0L);
        my_setopt(curl, CURLOPT_UPLOAD, uploadfile?1L:0L);
        my_setopt(curl, CURLOPT_DIRLISTONLY, config->dirlistonly?1L:0L);
        my_setopt(curl, CURLOPT_APPEND, config->ftp_append?1L:0L);

        if(config->netrc_opt)
          my_setopt(curl, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
        else if(config->netrc || config->netrc_file)
          my_setopt(curl, CURLOPT_NETRC, CURL_NETRC_REQUIRED);
        else
          my_setopt(curl, CURLOPT_NETRC, CURL_NETRC_IGNORED);

        if(config->netrc_file)
          my_setopt(curl, CURLOPT_NETRC_FILE, config->netrc_file);

        my_setopt(curl, CURLOPT_TRANSFERTEXT, config->use_ascii?1L:0L);
        my_setopt_str(curl, CURLOPT_USERPWD, config->userpwd);
        my_setopt_str(curl, CURLOPT_RANGE, config->range);
        my_setopt(curl, CURLOPT_ERRORBUFFER, errorbuffer);
        my_setopt(curl, CURLOPT_TIMEOUT_MS, (long)(config->timeout * 1000));

        if(built_in_protos & CURLPROTO_HTTP) {

          long postRedir = 0;

          my_setopt(curl, CURLOPT_FOLLOWLOCATION,
                    config->followlocation?1L:0L);
          my_setopt(curl, CURLOPT_UNRESTRICTED_AUTH,
                    config->unrestricted_auth?1L:0L);

          switch(config->httpreq) {
          case HTTPREQ_SIMPLEPOST:
            my_setopt_str(curl, CURLOPT_POSTFIELDS,
                          config->postfields);
            my_setopt(curl, CURLOPT_POSTFIELDSIZE_LARGE,
                      config->postfieldsize);
            break;
          case HTTPREQ_POST:
            my_setopt_httppost(curl, CURLOPT_HTTPPOST, config->httppost);
            break;
          default:
            break;
          }

          my_setopt_str(curl, CURLOPT_REFERER, config->referer);
          my_setopt(curl, CURLOPT_AUTOREFERER, config->autoreferer?1L:0L);
          my_setopt_str(curl, CURLOPT_USERAGENT, config->useragent);
          my_setopt_slist(curl, CURLOPT_HTTPHEADER, config->headers);

          /* new in libcurl 7.5 */
          my_setopt(curl, CURLOPT_MAXREDIRS, config->maxredirs);

          /* new in libcurl 7.9.1 */
          if(config->httpversion)
            my_setopt_enum(curl, CURLOPT_HTTP_VERSION, config->httpversion);

          /* new in libcurl 7.10.6 (default is Basic) */
          if(config->authtype)
            my_setopt_bitmask(curl, CURLOPT_HTTPAUTH, (long)config->authtype);

          /* curl 7.19.1 (the 301 version existed in 7.18.2),
             303 was added in 7.26.0 */
          if(config->post301)
            postRedir |= CURL_REDIR_POST_301;
          if(config->post302)
            postRedir |= CURL_REDIR_POST_302;
          if(config->post303)
            postRedir |= CURL_REDIR_POST_303;
          my_setopt(curl, CURLOPT_POSTREDIR, postRedir);

          /* new in libcurl 7.21.6 */