source: networking/netlibs/curl.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
  <!ENTITY % general-entities SYSTEM "../../general.ent">
  %general-entities;

  <!ENTITY curl-download-http "https://curl.se/download/curl-&curl-version;.tar.xz">
  <!ENTITY curl-download-ftp  " ">
  <!ENTITY curl-md5sum        "f4f37253c5f1ad9ee85fa6215fdfeb42">
  <!ENTITY curl-size          "2.6 MB">
  <!ENTITY curl-buildsize     "42 MB (add 18 MB for tests)">
  <!ENTITY curl-time          "0.2 SBU (with parallelism=4; add 4.1 SBU for tests (without valgrind, add 36 SBU with valgrind))">
]>

<sect1 id="curl" xreflabel="cURL-&curl-version;">
  <?dbhtml filename="curl.html"?>


  <title>cURL-&curl-version;</title>

  <indexterm zone="curl">
    <primary sortas="a-cURL">cURL</primary>
  </indexterm>

  <sect2 role="package">
    <title>Introduction to cURL</title>

    <para>
      The <application>cURL</application> package contains an utility
      and a library used for transferring files with URL syntax to any of
      the following protocols: DICT, FILE, FTP, FTPS, GOPHER, GOPHERS, HTTP,
      HTTPS, IMAP, IMAPS, LDAP, LDAPS, MQTT, POP3, POP3S, RTSP, SMB, SMBS,
      SMTP, SMPTS, TELNET, and TFTP. Its ability to both download
      and upload files can be incorporated into other programs to support
      functions like streaming media.
    </para>

    &lfs121_checked;

    <bridgehead renderas="sect3">Package Information</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Download (HTTP): <ulink url="&curl-download-http;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download (FTP): <ulink url="&curl-download-ftp;"/>
        </para>
      </listitem>
      <listitem>
        <para>
          Download MD5 sum: &curl-md5sum;
        </para>
      </listitem>
      <listitem>
        <para>
          Download size: &curl-size;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated disk space required: &curl-buildsize;
        </para>
      </listitem>
      <listitem>
        <para>
          Estimated build time: &curl-time;
        </para>
      </listitem>
    </itemizedlist>
<!--
    <bridgehead renderas="sect3">Additional Downloads</bridgehead>
    <itemizedlist spacing="compact">
      <listitem>
        <para>
          Required patch:
          <ulink url="&patch-root;/curl-&curl-version;-function_naming-1.patch"/>
        </para>
      </listitem>
    </itemizedlist>
-->

    <bridgehead renderas="sect3">cURL Dependencies</bridgehead>

    <bridgehead renderas="sect4">Recommended</bridgehead>
    <para role="recommended">
      <xref linkend="libpsl"/>
    </para>

    <note>
      <para>
        While there is an option to build the package without libpsl, both
        the upstream developers and the BLFS editors alike highly recommend
        not disabling support for libpsl due to severe security implications.
      </para>
    </note>

    <bridgehead renderas="sect4">Recommended at runtime</bridgehead>
    <para role="recommended">
      <xref role="runtime" linkend="make-ca"/>
    </para>

    <bridgehead renderas="sect4">Optional</bridgehead>
    <para role="optional">
      <xref linkend="brotli"/>,
      <xref linkend="c-ares"/>,
      <xref linkend="gnutls"/>,
      <xref linkend="libidn2"/>,
      <xref linkend="libssh2"/>,
      <xref linkend="mitkrb"/>,
      <xref linkend="nghttp2"/>,
      <xref linkend="openldap"/>,
      <!-- cURL implements the SMB client with own code.  Samba is only
           used for /usr/bin/ntlm_auth helper.  The path is correctly
           guessed even if Samba is not installed, so "runtime".  -->
      <xref role='runtime' linkend="samba"/>
      (runtime, for NTLM authentication),
      <ulink url="https://www.gnu.org/software/gsasl/">gsasl</ulink>,
      <ulink url="https://www.secureauth.com/labs/open-source-tools/impacket/">impacket</ulink>,
      <ulink url="https://launchpad.net/libmetalink/">libmetalink</ulink>,
      <ulink url="https://rtmpdump.mplayerhq.hu/">librtmp</ulink>,
      <ulink url="https://github.com/ngtcp2/ngtcp2/">ngtcp2</ulink>,
      <!--<ulink url="https://tls.mbed.org/">mbed TLS</ulink> (formerly known as
      PolarSSL), and -->
      <!-- mbedTLS/PolarSSL support was removed in 7.65.1 -->
      <ulink url="https://github.com/cloudflare/quiche">quiche</ulink>, and
      <ulink url="https://spnego.sourceforge.net/">SPNEGO</ulink>
    </para>

    <bridgehead renderas="sect4">Optional if Running the Test Suite</bridgehead>
    <para role="optional">
      <!-- stunnel is still listed in the docs as required, but 7.58.0
       tests completed happily without it, although the test for unit1323
       reported that the tool set in the test case does not exist - ken -->
      <xref linkend="apache"/> and
      <xref linkend="stunnel"/> (for the HTTPS and FTPS tests),
      <xref linkend="openssh"/>, and
      <xref linkend="valgrind"/> (this will slow the tests down and may cause failures.)
    </para>

  </sect2>

  <sect2 role="installation">
    <title>Installation of cURL</title>

    <para>
      Install <application>cURL</application> by running the following
      commands:
    </para>

<screen><userinput>./configure --prefix=/usr                           \
            --disable-static                        \
            --with-openssl                          \
            --enable-threaded-resolver              \
            --with-ca-path=/etc/ssl/certs &amp;&amp;
make</userinput></screen>

<!--
   For version 7.54.1 I got:
   TESTDONE: 869 tests out of 869 reported OK: 100%
   TESTDONE: 1092 tests were considered during 1080 seconds

    <para>
      Running the test suite is optional. About 2% of the tests fail. Increase
      in test time by each failed test is about 10%. Tests SBU above was
      obtained disabling failing tests, with:
    </para>

    2017-10-29 - bdubbs
    For version 7.56.1 I had a lot of test failures which included long
    timeouts.  Could not determine the cause of the timeouts or failures,
    but I was missing c-ares, MIT Kerberos, ldap, samba, and the six
    external packages.

    2017-12-01 - bdubbs
    Still a lot of test failures.  I did have c-ares, Kerberos, and ldap
    installed this time.  Best guess is that servers are not available.

    2018-08-01 - renodr
    No test failures, but I didn't have any of the optional dependencies except
    for c-ares and libidn2. I might re-run this test suite before release with
    all of the optional deps, but right now, it isn't a priority - rather
    the security fix is.
-->

    <para>
       To run the test suite, issue: <command>make test</command>.
       <!--One test, <filename>1477</filename>, is known to fail due to 
       a missing file in the curl tarball.--> Some tests are flaky, 
       so if some tests have failed it's possible to
       run a test again with: <command>(cd tests; ./runtests.pl
       <replaceable>&lt;test ID&gt;</replaceable>)</command> (the ID of
       failed tests are shown in the <quote><computeroutput>These test cases
       failed:</computeroutput></quote> message). If you run the tests after
       the package has been installed, some tests may fail because the man
       pages were deleted by the 'find' command in the installation instructions
       below.
    </para>
<!-- Two (of 857) tests
fail for unknown reasons, and all tests fail is valgrind is installed. Moving
valgrind out of $PATH is recommended if you wish to run the test suite while
it is installed.

Added by Pierre for curl-7.59.0:
no stunnel, no valgrind, no options
Warning: smb server unexpectedly alive
Warning: dict server unexpectedly alive
TESTDONE: 950 tests out of 951 reported OK: 99%
TESTFAIL: These test cases failed: 1148
TESTDONE: 1189 tests were considered during 362 seconds.
__________

         if stunnel and valgrind are not installed, and also most options
         (I had rtmpdump), the tests complete without problems.
Warning: smb server unexpectedly alive
Warning: dict server unexpectedly alive
TESTDONE: 938 tests out of 938 reported OK: 100%
TESTDONE: 1175 tests were considered during 355 seconds.
         and no. I don't have smb - so commenting the rest of this:
      To run the test suite, issue: <command>make test</command>. Many tests
      may fail that depend on optional dependencies that may not be installed
      or upstream servers that may not be available, especially for tests
      numbered 700 and above.
      Test time may be significantly increase due to hanging tests that fail.
__________
Added by Bruce for curl-7.60.0:
TESTDONE: 957 tests out of 959 reported OK: 99%
TESTFAIL: These test cases failed: 1139 1140
TESTDONE: 1196 tests were considered during 1184 seconds.
From the logs, both appear to be ipv6 releated.

==========
Added by Douglas for curl-7.61.0:
TESTDONE: 961 tests out of 961 reported OK: 100%
TESTDONE: 1202 tests were considered during 338 seconds.
I only have c-ares and libidn2 installed, I will likely try before release
with all optional dependencies in the book installed.

=========
7.61.1 NOTE: The test suite is extremely noisy, complaining about verification errors.
It's possible this is due to openssl-1.1.1, BUT 79/79 tests report as 100% OK. I had
c-ares, libpsl, and libidn1/2 installed. - Doug

========
7.62.0: All tests passed. libpsl, c-ares, libssh2, libidn2 installed.
All 1098 tests report OK.

=======
Added by Douglas for curl-7.64.0:
TESTDONE: 1022 tests out of 1023 reported OK: 99%
TESTFAIL: These tests cases failed: 323
TESTDONE: 1235 tests were considered during 1279 seconds.
For dependencies, I had c-ares, gnutls, libidn2, libpsl, krb5, libssh2, nghttp2,
OpenLDAP, Samba, stunnel, and Valgrind installed.
=======
Added by bdubbs for curl-7.64.1:
TESTDONE: 1022 tests out of 1025 reported OK: 99%
TESTFAIL: These test cases failed: 323 1139 1140
TESTDONE: 1242 tests were considered during 1483 seconds

=======
Added by renodr for curl-7.65.1:
TESTDONE: 996 tests out of 997 reported OK: 99%
TESTFAIL: These test cases failed: 1560
TESTDONE: 1249 tests were considered during 1091 seconds.
All dependencies except for externals installed.
=======
Added by bdubbs for curl-7.65.2:
TESTDONE: 1034 tests out of 1036 reported OK: 99%
TESTFAIL: These test cases failed: 323 1560
TESTDONE: 1254 tests were considered during 1362 seconds.
Time above does not include test build time.
All dependencies except for externals installed.
=======
Added by bdubbs for curl-7.65.3:
TESTDONE: 1031 tests out of 1036 reported OK: 99%
TESTFAIL: These test cases failed: 323 1139 1140 1173 1560
TESTDONE: 1254 tests were considered during 1364 seconds.

The tests that fail seem to be somewhat random.  What happened between
yesterday and today that that tests 1139 1140 1173 now fail?

=======
Added by bdubbs for curl-7.68.0:
TESTDONE: 1066 tests out of 1071 reported OK: 99%
TESTFAIL: These test cases failed: 323 1139 1140 1173 1560
TESTDONE: 1290 tests were considered during 1515 seconds.

=======
Added by bdubbs for curl-7.69.0:
TESTDONE: 074 tests out of 1079 reported OK: 99%
TESTFAIL: These test cases failed: 323 1139 1140 1173 1560
TESTDONE: 1320 tests were considered during 1514 seconds.

For curl-7.69.1, 1082 tests out of 1086 reported OK.  1560 now passes.
1330 tests were considered during 1528 seconds.

======
Added by renodr for curl-7.70.0:
TESTDONE: 1062 tests out of 1062 reported OK: 100%
TESTDONE: 1352 tests were considered during 1218 seconds.
Tests were ran with all dependencies present except for stunnel.
impacket only seems to add one extra test to the mix as well.

======
Added by renodr for curl-7.71.0:
TESTDONE: 1072 tests out of 1072 reported OK: 100%
TESTDONE: 1364 tests were considered during 1202 seconds.
Tests were run similarly to 7.70.0 - all deps except for stunnel.

======
Added by renodr for curl-7.71.1:
TESTDONE: 1076 tests out of 1076 reported OK: 100%
TESTDONE: 1368 tests were considered during 1207 seconds.
Tests were run similarly to 7.71.0, including impacket, but no stunnel.

======
Added by renodr for curl-7.72.0:
TESTDONE: 1094 tests out of 1097 reported OK: 99%
TESTFAIL: These test cases failed: 1700 1701 1702
TESTDONE: 1374 tests were considered during 1285 seconds.
Tests have all BLFS dependencies with the exception of stunnel;
and the optional impacket python module was installed.
Tests seem to be failing due to a missing 'nghttpx' executable
used to start a test server.

======
Added by renodr for curl-7.73.0:
TESTDONE: 1121 tests out of 1121 reported OK: 100%
TESTDONE: 1387 tests were considered during 1303 seconds.
Tests have all BLFS dependencies installed with the exception of stunnel,
as well as the optional impacket installed.

======
Added by renodr for curl-7.74.0:
TESTDONE: 1119 tests out of 1119 reported OK: 100%
TESTDONE: 1388 tests were considered during 1370 seconds.
Tests have all BLFS dependencies installed, as well as impacket.
stunnel not installed.

======
Added by bdubbs for curl-7.79.0:
TESTDONE: 1432 tests were considered during 1543 seconds.
TESTDONE: 1208 tests out of 1212 reported OK: 99%

Tests have all BLFS dependencies installed but without impacket.

======
Added by plabs for curl-7.79.1:
TESTDONE: 1434 tests were considered during 1652 seconds.
TESTDONE: 1171 tests out of 1171 reported OK: 100%
Tests have all BLFS dependencies installed except stunnel but without impacket.
====
bdubbs curl-7.83.0  2022-04-28
TESTDONE: 1497 tests were considered during 1666 seconds.
TESTDONE: 1252 tests out of 1256 reported OK: 99%
TESTFAIL: These test cases failed: 1139 1140 1173 1177
====
Added by xry111 for curl-7.85.0 on 2022-09-01:
With:
  all BLFS dependencies but stunnel installed
  libssh2-2.10.0 patched with libssh2-1.10.0-upstream_fix-1.patch
  with-{gssapi,libssh2} enable-threaded-resolver
TESTDONE: 1520 tests were considered during 508 seconds.
TESTDONE: 1327 tests out of 1328 reported OK: 99%
TESTFAIL: These test cases failed: 1459
  It is a SCP test for bad .known_hosts file and fails because of a mismatch
  of error codes, I don't think it indicated a serious issue.
[renodr] - Test results for 7.85.0 (2022-09-03), no libssh2 enabled or gssapi
TESTDONE: 1528 tests were considered during 2041 seconds.
TESTDONE: 1326 tests out of 1326 reported OK: 100%

[renodr] - Test results for 7.87.0 (2022-12-30)
TESTDONE: 1559 tests were considered during 2112 seconds.
TESTDONE: 1342 tests out of 1342 reported OK: 100%
libssh2 installed and enabled

[renodr] - Test results for 8.0.1 (2023-03-27)
TESTDONE: 1593 tests were considered during 4761 seconds.
TESTDONE: 1356 tests out of 1356 reported OK: 100%
All BLFS dependencies installed.
Note that if I move /usr/bin/valgrind to a place where it can't be found, I get
TESTDONE: 1593 tests were considered during 595 seconds.
TESTDONE: 1356 tests out of 1356 reported OK: 100%
It appears that every test is now run under valgrind.

[renodr] - Test results for 8.2.1 (2023-07-26)
TESTDONE: 1611 tests were considered during 2129 seconds.
TESTDONE: 1369 tests out of 1369 reported OK: 100%
All BLFS dependencies installed, and run under valgrind.

[renodr] - Test results for 8.3.0 (2023-09-14)
TESTDONE: 1635 tests were considered during 4068 seconds.
TESTDONE: 1386 tests out of 1387 reported OK: 99%
TESTFAIL: These test cases failed: 1474
All BLFS dependencies installed, and run under valgrind. Test 1474 is flaky.

[renodr] - Test results for 8.4.0 (2023-10-11)
TESTDONE: 1646 tests were considered during 2290 seconds.
TESTDONE: 1449 tests out of 1452 reported OK: 99%
TESTFAIL: These test cases failed: 1474 3021 3022
All BLFS dependencies are installed, and the tests were run with Valgrind
installed as well. Test 3021 and 3022 fails due to incompatibilities with
our version of SSH. See https://github.com/curl/curl/issues/12096
Test 1474 is still flaky.

[bdubbs] - Test results for 8.6.0 (2024-02-01)
TESTDONE: 1673 tests were considered during 395 seconds.
TESTDONE: 1355 tests out of 1360 reported OK: 99%
TESTFAIL: These test cases failed: 1139 1140 1173 1177 1477
Run without valgrind.
Tests seem to looking for man pages that are missing.
- renodr: this is because tests were run after the man pages were deleted by
  the find command after 'make install'
-->

    <para>
      Now, as the <systemitem class="username">root</systemitem>
      user:
    </para>

<screen role="root"><userinput>make install &amp;&amp;

rm -rf docs/examples/.deps &amp;&amp;

find docs \( -name Makefile\* -o  \
             -name \*.1       -o  \
             -name \*.3       -o  \
             -name CMakeLists.txt \) -delete &amp;&amp;

cp -v -R docs -T /usr/share/doc/curl-&curl-version;</userinput></screen>

    <para>
      To run some simple verification tests on the newly installed
      <command>curl</command>, issue the following commands:
      <command>curl --trace-ascii debugdump.txt https://www.example.com/</command>
      and
      <command>curl --trace-ascii d.txt --trace-time https://example.com/</command>.
      Inspect the locally created trace files <filename>debugdump.txt</filename>
      and <filename>d.txt</filename>, which contains version information,
      downloaded files information, etc. One file has the time for each action logged.
    </para>
  </sect2>

  <sect2 role="commands">
    <title>Command Explanations</title>

    <xi:include xmlns:xi="http://www.w3.org/2001/XInclude"
      href="../../xincludes/static-libraries.xml"/>

    <para>
      <parameter>--enable-threaded-resolver</parameter>: This switch enables
      <application>cURL</application>'s builtin threaded DNS resolver.
    </para>

    <para>
      <parameter>--with-ca-path=/etc/ssl/certs</parameter>: This
      switch sets the location of the BLFS Certificate Authority store.
    </para>

    <para>
      <parameter>--with-openssl</parameter>: This parameter chooses
      <application>OpenSSL</application> as SSL/TLS implementation.
      This seems mandatory now.
    </para>

    <para>
      <option>--with-gssapi</option>: This parameter adds
      <application>Kerberos 5</application> support to
      <filename class="libraryfile">libcurl</filename>.
    </para>

    <para>
      <option>--without-ssl --with-gnutls</option>: Use this switch to
      build with <application>GnuTLS</application> support
      instead of <application>OpenSSL</application> for SSL/TLS.
    </para>

    <para>
      <option>--with-ca-bundle=/etc/pki/tls/certs/ca-bundle.crt</option>: Use
      this switch instead of <parameter>--with-ca-path</parameter> if
      building with <application>GnuTLS</application> support
      instead of <application>OpenSSL</application> for SSL/TLS.
    </para>

    <para>
      <option>--with-libssh2</option>: This parameter adds
      <application>SSH</application> support to cURL. This is disabled
      by default.
    </para>

    <para>
      <option>--enable-ares</option>: This parameter adds
      support for DNS resolution through the c-ares library. It overrides
      <parameter>--enable-threaded-resolver</parameter> and is not widely
      tested by the editors.
    </para>

    <para>
      <command>find docs ... -exec rm {} \;</command>: This command removes
      <filename>Makefiles</filename> and man files from the documentation
      directory that would otherwise be installed by the commands that follow.
    </para>

  </sect2>

  <sect2 role="content">
    <title>Contents</title>

    <segmentedlist>
      <segtitle>Installed Programs</segtitle>
      <segtitle>Installed Library</segtitle>
      <segtitle>Installed Directories</segtitle>

      <seglistitem>
        <seg>
           curl and curl-config
        </seg>
        <seg>
           libcurl.so
        </seg>
        <seg>
          /usr/include/curl and
          /usr/share/doc/curl-&curl-version;
        </seg>
      </seglistitem>
    </segmentedlist>

    <variablelist>
      <bridgehead renderas="sect3">Short Descriptions</bridgehead>
      <?dbfo list-presentation="list"?>
      <?dbhtml list-presentation="table"?>

      <varlistentry id="curl-prog">
        <term><command>curl</command></term>
        <listitem>
         <para>
           is a command line tool for transferring files with URL syntax
         </para>
          <indexterm zone="curl curl-prog">
            <primary sortas="b-curl">curl</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="curl-config">
        <term><command>curl-config</command></term>
        <listitem>
          <para>
            prints information about the last compile, like libraries
            linked to and prefix setting
          </para>
          <indexterm zone="curl curl-config">
            <primary sortas="b-curl-config">curl-config</primary>
          </indexterm>
        </listitem>
      </varlistentry>

      <varlistentry id="libcurl">
        <term><filename class="libraryfile">libcurl.so</filename></term>
        <listitem>
          <para>
            provides the API functions required by
            <command>curl</command> and other programs
          </para>
          <indexterm zone="curl libcurl">
            <primary sortas="c-libcurl">libcurl.so</primary>
          </indexterm>
        </listitem>
      </varlistentry>

    </variablelist>

  </sect2>

</sect1>