runtests.pl

#!/usr/bin/env perl
#***************************************************************************
#                                  _   _ ____  _
#  Project                     ___| | | |  _ \| |
#                             / __| | | | |_) | |
#                            | (__| |_| |  _ <| |___
#                             \___|\___/|_| \_\_____|
#
# Copyright (C) 1998 - 2005, 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.
#
# $Id$
###########################################################################
# These should be the only variables that might be needed to get edited:

use strict;
#use warnings;

@INC=(@INC, $ENV{'srcdir'}, ".");

require "getpart.pm"; # array functions
require "valgrind.pm"; # valgrind report parser

my $srcdir = $ENV{'srcdir'} || '.';
my $HOSTIP="127.0.0.1";
my $HOST6IP="[::1]";

my $base = 8990; # base port number

my $HTTPPORT; # HTTP server port
my $HTTP6PORT; # HTTP IPv6 server port
my $HTTPSPORT; # HTTPS server port
my $FTPPORT; # FTP server port
my $FTP2PORT; # FTP server 2 port
my $FTPSPORT; # FTPS server port

my $CURL="../src/curl"; # what curl executable to run on the tests
my $DBGCURL=$CURL; #"../src/.libs/curl";  # alternative for debugging
my $LOGDIR="log";
my $TESTDIR="$srcdir/data";
my $LIBDIR="./libtest";
my $SERVERIN="$LOGDIR/server.input"; # what curl sent the server
my $SERVER2IN="$LOGDIR/server2.input"; # what curl sent the second server
my $CURLLOG="$LOGDIR/curl.log"; # all command lines run
my $FTPDCMD="$LOGDIR/ftpserver.cmd"; # copy ftp server instructions here

# Normally, all test cases should be run, but at times it is handy to
# simply run a particular one:
my $TESTCASES="all";

# To run specific test cases, set them like:
# $TESTCASES="1 2 3 7 8";

#######################################################################
# No variables below this point should need to be modified
#

my $HTTPPIDFILE=".http.pid";
my $HTTP6PIDFILE=".http6.pid";
my $HTTPSPIDFILE=".https.pid";
my $FTPPIDFILE=".ftp.pid";
my $FTP2PIDFILE=".ftp2.pid";
my $FTPSPIDFILE=".ftps.pid";

# invoke perl like this:
my $perl="perl -I$srcdir";

# this gets set if curl is compiled with debugging:
my $curl_debug=0;

# name of the file that the memory debugging creates:
my $memdump="$LOGDIR/memdump";

# the path to the script that analyzes the memory debug output file:
my $memanalyze="./memanalyze.pl";

my $stunnel = checkcmd("stunnel");
my $valgrind = checkcmd("valgrind");

my $valgrind_tool;
if($valgrind) {
    # since valgrind 2.1.x, '--tool' option is mandatory
    # use it, if it is supported by the version installed on the system
    system("valgrind --help 2>&1 | grep -- --tool > /dev/null 2>&1");
    if (($? >> 8)==0) {
        $valgrind_tool="--tool=memcheck ";
    }
    open(C, "<$CURL");
    my $l = <C>;
    if($l =~ /^\#\!/) {
        # The first line starts with "#!" which implies a shell-script.
        # This means libcurl is built shared and curl is a wrapper-script
        # Disable valgrind in this setup
        $valgrind=0;
    }
    close(C);
}

my $gdb = checkcmd("gdb");

my $ssl_version; # set if libcurl is built with SSL support
my $large_file;  # set if libcurl is built with large file support
my $has_idn;     # set if libcurl is built with IDN support
my $http_ipv6;   # set if HTTP server has IPv6 support
my $has_ipv6;    # set if libcurl is built with IPv6 support
my $has_libz;    # set if libcurl is built with libz support
my $has_getrlimit;  # set if system has getrlimit()

my $skipped=0;  # number of tests skipped; reported in main loop
my %skipped;    # skipped{reason}=counter, reasons for skip
my @teststat;   # teststat[testnum]=reason, reasons for skip

#######################################################################
# variables the command line options may set
#

my $short;
my $verbose;
my $debugprotocol;
my $anyway;
my $gdbthis;      # run test case with gdb debugger
my $keepoutfiles; # keep stdout and stderr files after tests
my $listonly;     # only list the tests
my $postmortem;   # display detailed info about failed tests

my $pwd;          # current working directory

my %run;	  # running server

# torture test variables
my $torture;
my $tortnum;
my $tortalloc;

chomp($pwd = `pwd`);

# enable memory debugging if curl is compiled with it
$ENV{'CURL_MEMDEBUG'} = $memdump;
$ENV{'HOME'}=$pwd;

##########################################################################
# Clear all possible '*_proxy' environment variables for various protocols
# to prevent them to interfere with our testing!

my $protocol;
foreach $protocol (('ftp', 'http', 'ftps', 'https', 'gopher', 'no')) {
    my $proxy = "${protocol}_proxy";
    # clear lowercase version
    $ENV{$proxy}=undef;
    # clear uppercase version
    $ENV{uc($proxy)}=undef;
}

#######################################################################
# Check for a command in the PATH.
#
sub checkcmd {
    my ($cmd)=@_;
    my @paths=("/usr/sbin", "/usr/local/sbin", "/sbin", "/usr/bin",
               "/usr/local/bin", split(":", $ENV{'PATH'}));
    for(@paths) {
        if( -x "$_/$cmd") {
            return "$_/$cmd";
        }
    }
}

#######################################################################
# Return the pid of the server as found in the given pid file
#
sub serverpid {
    my $PIDFILE = $_[0];
    open(PFILE, "<$PIDFILE");
    my $PID=0+<PFILE>;
    close(PFILE);
    return $PID;
}

#######################################################################
# Memory allocation test and failure torture testing.
#
sub torture {
    my $testcmd = shift;
    my $gdbline = shift;

    # remove memdump first to be sure we get a new nice and clean one
    unlink($memdump);

    # First get URL from test server, ignore the output/result
    system($testcmd);

    print " CMD: $testcmd\n" if($verbose);

    # memanalyze -v is our friend, get the number of allocations made
    my $count=0;
    my @out = `$memanalyze -v $memdump`;
    for(@out) {
        if(/^Allocations: (\d+)/) {
            $count = $1;
            last;
        }
    }
    if(!$count) {
        print " found no allocs to make fail\n";
        return 0;
    }

    print " $count allocations to make fail\n";

    for ( 1 .. $count ) {
        my $limit = $_;
        my $fail;
        my $dumped_core;

        if($tortalloc && ($tortalloc != $limit)) {
            next;
        }

        print "Fail alloc no: $limit\r" if($verbose);

        # make the memory allocation function number $limit return failure
        $ENV{'CURL_MEMLIMIT'} = $limit;

        # remove memdump first to be sure we get a new nice and clean one
        unlink($memdump);

        print "**> Alloc number $limit is now set to fail <**\n" if($gdbthis);

        my $ret;
        if($gdbthis) {
            system($gdbline)
        }
        else {
            $ret = system($testcmd);
        }

        # Now clear the variable again
        $ENV{'CURL_MEMLIMIT'} = undef;

        if(-r "core") {
            # there's core file present now!
            print " core dumped!\n";
            $dumped_core = 1;
            $fail = 2;
        }

        # verify that it returns a proper error code, doesn't leak memory
        # and doesn't core dump
        if($ret & 255) {
            print " system() returned $ret\n";
            $fail=1;
        }
        else {
            my @memdata=`$memanalyze $memdump`;
            my $leak=0;
            for(@memdata) {
                if($_ ne "") {
                    # well it could be other memory problems as well, but
                    # we call it leak for short here
                    $leak=1;
                }
            }
            if($leak) {
                print "** MEMORY FAILURE\n";
                print @memdata;
                print `$memanalyze -l $memdump`;
                $fail = 1;
            }
        }
        if($fail) {
            print " Failed on alloc number $limit in test.\n",
            " invoke with -t$limit to repeat this single case.\n";
            stopservers();
            exit 1;
        }
    }

    print "torture OK\n";
    return 0;

    #stopservers();
    #exit; # for now, we stop after these tests
}

#######################################################################
# stop the given test server
#
sub stopserver {
    my $pid = $_[0];
    # check for pidfile
    if ( -f $pid ) {
        my $PIDFILE = $pid;
        $pid = serverpid($PIDFILE);
        unlink $PIDFILE; # server is killed
    }
    elsif($pid <= 0) {
        return; # this is not a good pid
    }

    my $res = kill (9, $pid); # die!

    if($res && $verbose) {
        print "RUN: Test server pid $pid signalled to die\n";
    }
    elsif($verbose) {
        print "RUN: Test server pid $pid didn't exist\n";
    }
}

#######################################################################
# check the given test server if it is still alive
#
sub checkserver {
    my ($pidfile)=@_;
    my $pid=0;

    # check for pidfile
    if ( -f $pidfile ) {
        $pid=serverpid($pidfile);
        if ($pid ne "" && kill(0, $pid)) {
            return $pid;
        }
        else {
            return -$pid; # negative means dead process
        }
    }
    return 0;
}

#######################################################################
# start the http server, or if it already runs, verify that it is our
# test server on the test-port!
#
sub runhttpserver {
    my ($verbose, $ipv6) = @_;
    my $RUNNING;
    my $pid;

    my $pidfile = $HTTPPIDFILE;
    my $port = $HTTPPORT;
    my $ip = $HOSTIP;
    my $nameext;

    if($ipv6) {
        # if IPv6, use a different setup
        $pidfile = $HTTP6PIDFILE;
        $port = $HTTP6PORT;
        $ip = $HOST6IP;
        $nameext="-ipv6";
    }

    $pid = checkserver($pidfile);

    # verify if our/any server is running on this port
    my $cmd = "$CURL -o log/verifiedserver -g \"http://$ip:$port/verifiedserver\" 2>log/verifystderr";
    print "CMD; $cmd\n" if ($verbose);
    my $res = system($cmd);

    $res >>= 8; # rotate the result
    my $data;

    if($res && $verbose) {
        open(ERR, "<log/verifystderr");
        my @e = <ERR>;
        close(ERR);
        print "RUN: curl command returned $res\n";
        for(@e) {
            if($_ !~ /^([ \t]*)$/) {
                print "RUN: $_";
            }
        }
    }
    open(FILE, "<log/verifiedserver");
    my @file=<FILE>;
    close(FILE);
    $data=$file[0]; # first line

    if ( $data =~ /WE ROOLZ: (\d+)/ ) {
        $pid = 0+$1;
    }
    elsif($res == 6) {
        # curl: (6) Couldn't resolve host '::1'
        print "RUN: failed to resolve host\n";
        return -3;
    }
    elsif($data || ($res != 7)) {
        print "RUN: Unknown server is running on port $port\n";
        return -2;
    }

    if($pid > 0) {
        my $res = kill (9, $pid); # die!
        if(!$res) {
            print "RUN: Failed to kill test HTTP$nameext server, do it ",
            "manually and restart the tests.\n";
            exit;
        }
        sleep(1);
    }

    my $flag=$debugprotocol?"-v ":"";
    my $dir=$ENV{'srcdir'};
    if($dir) {
        $flag .= "-d \"$dir\" ";
    }
    $cmd="$perl $srcdir/httpserver.pl -p $pidfile $flag $port $ipv6 &";
    system($cmd);
    if($verbose) {
        print "CMD: $cmd\n";
    }

    my $verified;
    for(1 .. 30) {
        # verify that our server is up and running:
        my $data=`$CURL --silent -g \"$ip:$port/verifiedserver\" 2>/dev/null`;

        if ( $data =~ /WE ROOLZ: (\d+)/ ) {
            $pid = 0+$1;
            $verified = 1;
            last;
        }
        else {
            if($verbose) {
                print STDERR "RUN: Retrying HTTP$nameext server existence in 1 sec\n";
            }
            sleep(1);
            next;
        }
    }
    if(!$verified) {
        print STDERR "RUN: failed to start our HTTP$nameext server\n";
        return -1;
    }

    if($verbose) {
        print "RUN: HTTP$nameext server is now verified to be our server\n";
    }

    return $pid;
}

#######################################################################
# start the https server (or rather, tunnel) if needed
#
sub runhttpsserver {
    my $verbose = $_[0];
    my $STATUS;
    my $RUNNING;

    if(!$stunnel) {
        return 0;
    }

    my $pid=checkserver($HTTPSPIDFILE );

    if($pid > 0) {
        # kill previous stunnel!
        if($verbose) {
            print "RUN: kills off running stunnel at $pid\n";
        }
        stopserver($HTTPSPIDFILE);
    }

    my $flag=$debugprotocol?"-v ":"";
    my $cmd="$perl $srcdir/httpsserver.pl $flag -s \"$stunnel\" -d $srcdir -r $HTTPPORT $HTTPSPORT &";
    system($cmd);
    if($verbose) {
        print "CMD: $cmd\n";
    }
    sleep(1);

    for(1 .. 30) {
        $pid=checkserver($HTTPSPIDFILE);

        if($pid <= 0) {
            if($verbose) {
                print STDERR "RUN: waiting one sec for HTTPS server\n";
            }
            sleep(1);
        }
        else {
            last;
        }
    }

    return $pid;
}

#######################################################################
# start the ftp server if needed
#
sub runftpserver {
    my ($id, $verbose) = @_;
    my $STATUS;
    my $RUNNING;
    my $port = $id?$FTP2PORT:$FTPPORT;
    # check for pidfile
    my $pid = checkserver ($id?$FTP2PIDFILE:$FTPPIDFILE);

    if ($pid <= 0) {
        print "RUN: Check port $port for the FTP$id server\n"
            if ($verbose);

        my $time=time();
        # check if this is our server running on this port:
        my @data=`$CURL -m4 --silent ftp://$HOSTIP:$port/verifiedserver 2>/dev/null`;
        my $line;

        # if this took more than 2 secs, we assume it "hung" on a weird server
        my $took = time()-$time;

        foreach $line (@data) {
            if ( $line =~ /WE ROOLZ: (\d+)/ ) {
                # this is our test server with a known pid!
                $pid = 0+$1;
            }
        }
        if(!$pid && $data[0]) {
            # this is not a known server
            print "RUN: Unknown server on our favourite FTP port: $port\n";
            return -1;
        }
    }

    if($pid > 0) {
        print "RUN: Killing a previous server using pid $pid\n" if($verbose);
        my $res = kill (9, $pid); # die!
        if(!$res) {
            print "RUN: Failed to kill FTP$id test server, do it manually and",
            " restart the tests.\n";
            return -1;
        }
        sleep(1);
    }

    # now (re-)start our server:
    my $flag=$debugprotocol?"-v ":"";
    $flag .= "-s \"$srcdir\" ";
    if($id) {
        $flag .="--id $id ";
    }
    my $cmd="$perl $srcdir/ftpserver.pl $flag $port &";
    if($verbose) {
        print "CMD: $cmd\n";
    }
    system($cmd);

    my $verified;
    $pid = 0;
    for(1 .. 30) {
        # verify that our server is up and running:
        my $line;
        my $cmd="$CURL --silent ftp://$HOSTIP:$port/verifiedserver 2>/dev/null";
        print "$cmd\n" if($verbose);
        my @data = `$cmd`;
        foreach $line (@data) {
            if ( $line =~ /WE ROOLZ: (\d+)/ ) {
                $pid = 0+$1;
                $verified = 1;
                last;
            }
        }
        if(!$pid) {
            if($verbose) {
                print STDERR "RUN: Retrying FTP$id server existence in a sec\n";
            }
            sleep(1);
            next;
        }
        else {
            last;
        }
    }
    if(!$verified) {
        warn "RUN: failed to start our FTP$id server\n";
        return -2;
    }

    if($verbose) {
        print "RUN: FTP$id server is now verified to be our server\n";
    }

    return $pid;
}

#######################################################################
# start the ftps server (or rather, tunnel) if needed
#
sub runftpsserver {
    my $verbose = $_[0];
    my $STATUS;
    my $RUNNING;

    if(!$stunnel) {
        return 0;
    }
    my $pid=checkserver($FTPSPIDFILE );

    if($pid > 0) {
        # kill previous stunnel!
        if($verbose) {
            print "kills off running stunnel at $pid\n";
        }
        stopserver($FTPSPIDFILE);
    }

    my $flag=$debugprotocol?"-v ":"";
    my $cmd="$perl $srcdir/ftpsserver.pl $flag -s \"$stunnel\" -d $srcdir -r $FTPPORT $FTPSPORT &";
    system($cmd);
    if($verbose) {
        print "CMD: $cmd\n";
    }
    sleep(1);

    for(1 .. 30) {

        $pid=checkserver($FTPSPIDFILE );

        if($pid <= 0) {
            if($verbose) {
                print STDERR "RUN: waiting one sec for FTPS server\n";
            }
            sleep(1);
        }
        else {
            last;
        }
    }

    return $pid;
}

#######################################################################
# Remove all files in the specified directory
#
sub cleardir {
    my $dir = $_[0];
    my $count;
    my $file;

    # Get all files
    opendir(DIR, $dir) ||
        return 0; # can't open dir
    while($file = readdir(DIR)) {
        if($file !~ /^\./) {
            unlink("$dir/$file");
            $count++;
        }
    }
    closedir DIR;
    return $count;
}

#######################################################################
# filter out the specified pattern from the given input file and store the
# results in the given output file
#
sub filteroff {
    my $infile=$_[0];
    my $filter=$_[1];
    my $ofile=$_[2];

    open(IN, "<$infile")
        || return 1;

    open(OUT, ">$ofile")
        || return 1;

    # print "FILTER: off $filter from $infile to $ofile\n";

    while(<IN>) {
        $_ =~ s/$filter//;
        print OUT $_;
    }
    close(IN);
    close(OUT);
    return 0;
}

#######################################################################
# compare test results with the expected output, we might filter off
# some pattern that is allowed to differ, output test results
#

sub compare {
    # filter off patterns _before_ this comparison!
    my ($subject, $firstref, $secondref)=@_;

    my $result = compareparts($firstref, $secondref);

    if($result) {
        if(!$short) {
            print "\n $subject FAILED:\n";
            print showdiff($LOGDIR, $firstref, $secondref);
        }
        else {
            print "FAILED\n";
        }
    }
    return $result;
}

#######################################################################
# display information about curl and the host the test suite runs on
#
sub checkcurl {

    unlink($memdump); # remove this if there was one left

    my $feat;
    my $curl;
    my $libcurl;
    my @version=`$CURL --version 2>/dev/null`;
    for(@version) {
        chomp;

        if($_ =~ /^curl/) {
            $curl = $_;
            $curl =~ s/^(.*)(libcurl.*)/$1/g;
            $libcurl = $2;
            if($curl =~ /mingw32/) {
                # This is a windows minw32 build, we need to translate the
                # given path to the "actual" windows path.

                my @m = `mount`;
                my $matchlen;
                my $bestmatch;
                my $mount;

# example mount output:
# C:\DOCUME~1\Temp on /tmp type user (binmode,noumount)
# c:\ActiveState\perl on /perl type user (binmode)
# C:\msys\1.0\bin on /usr/bin type user (binmode,cygexec,noumount)
# C:\msys\1.0\bin on /bin type user (binmode,cygexec,noumount)

                foreach $mount (@m) {
                    if( $mount =~ /(.*) on ([^ ]*) type /) {
                        my ($mingw, $real)=($2, $1);
                        if($pwd =~ /^$mingw/) {
                            # the path we got from pwd starts with the path
                            # we found on this line in the mount output

                            my $len = length($real);
                            if($len > $matchlen) {
                                # we remember the match that is the longest
                                $matchlen = $len;
                                $bestmatch = $real;
                            }
                        }
                    }
                }
                if(!$matchlen) {
                    print "Serious error, can't find our \"real\" path!\n";
                }
                else {
                    # now prepend the prefix from the mount command to build
                    # our "actual path"
                    $pwd = "$bestmatch$pwd";
                }
                $pwd =~ s#\\#/#g;
            }
            elsif ($curl =~ /win32/)
            {
               # Native Windows builds don't understand the
               # output of cygwin's pwd.  It will be
               # something like /cygdrive/c/<some path>.
               #
               # Use the cygpath utility to convert the
               # working directory to a Windows friendly
               # path.  The -m option converts to use drive
               # letter:, but it uses / instead \.  Forward
               # slashes (/) are easier for us.  We don't
               # have to escape them to get them to curl
               # through a shell.
               chomp($pwd = `cygpath -m $pwd`);
           }
        }
        elsif($_ =~ /^Protocols: (.*)/i) {
            # these are the supported protocols, we don't use this knowledge
            # at this point
        }
        elsif($_ =~ /^Features: (.*)/i) {
            $feat = $1;
            if($feat =~ /debug/i) {
                # debug is a listed "feature", use that knowledge
                $curl_debug = 1;
                # set the NETRC debug env
                $ENV{'CURL_DEBUG_NETRC'} = 'log/netrc';
            }
            if($feat =~ /SSL/i) {
                # ssl enabled
                $ssl_version=1;
            }
            if($feat =~ /Largefile/i) {
                # large file support
                $large_file=1;
            }
            if($feat =~ /IDN/i) {
                # IDN support
                $has_idn=1;
            }
            if($feat =~ /IPv6/i) {
                $has_ipv6 = 1;
            }
            if($feat =~ /libz/i) {
                $has_libz = 1;
            }
        }
    }
    if(!$curl) {
        die "couldn't run '$CURL'"
    }

    if(-r "../lib/config.h") {
        open(CONF, "<../lib/config.h");
        while(<CONF>) {
            if($_ =~ /^\#define HAVE_GETRLIMIT/) {
                $has_getrlimit = 1;
            }
        }
        close(CONF);
    }

    if($has_ipv6) {
        # client has ipv6 support, check that the HTTP server has it!
        my @sws = `server/sws --version`;
        if($sws[0] =~ /IPv6/) {
            # HTTP server has ipv6 support!
            $http_ipv6 = 1;
        }
    }

    if(!$curl_debug && $torture) {
        die "can't run torture tests since curl was not build with debug";
    }

    my $hostname=`hostname`;
    my $hosttype=`uname -a`;

    print "********* System characteristics ******** \n",
    "* $curl\n",
    "* $libcurl\n",
    "* Features: $feat\n",
    "* Host: $hostname",
    "* System: $hosttype";

    printf("* Server SSL:     %s\n", $stunnel?"ON":"OFF");
    printf("* libcurl SSL:    %s\n", $ssl_version?"ON":"OFF");
    printf("* libcurl debug:  %s\n", $curl_debug?"ON":"OFF");
    printf("* valgrind:       %s\n", $valgrind?"ON":"OFF");
    printf("* HTTP IPv6       %s\n", $http_ipv6?"ON":"OFF");

    printf("* HTTP port:      %d\n", $HTTPPORT);
    printf("* FTP port:       %d\n", $FTPPORT);
    printf("* FTP port 2:     %d\n", $FTP2PORT);
    if($stunnel) {
        printf("* FTPS port:      %d\n", $FTPSPORT);
        printf("* HTTPS port:     %d\n", $HTTPSPORT);
    }
    if($http_ipv6) {
        printf("* HTTP IPv6 port: %d\n", $HTTP6PORT);
    }
    print "***************************************** \n";
}

#######################################################################
# substitute the variable stuff into either a joined up file or
# a command, in either case passed by reference
#
sub subVariables {
  my ($thing) = @_;
  $$thing =~ s/%HOSTIP/$HOSTIP/g;
  $$thing =~ s/%HTTPPORT/$HTTPPORT/g;
  $$thing =~ s/%HOST6IP/$HOST6IP/g;
  $$thing =~ s/%HTTP6PORT/$HTTP6PORT/g;
  $$thing =~ s/%HTTPSPORT/$HTTPSPORT/g;
  $$thing =~ s/%FTPPORT/$FTPPORT/g;
  $$thing =~ s/%FTP2PORT/$FTP2PORT/g;
  $$thing =~ s/%FTPSPORT/$FTPSPORT/g;
  $$thing =~ s/%SRCDIR/$srcdir/g;
  $$thing =~ s/%PWD/$pwd/g;
}

sub fixarray {
    my @in = @_;

    for(@in) {
        subVariables \$_;
    }
    return @in;
}

#######################################################################
# Run a single specified test case
#

sub singletest {
    my $testnum=$_[0];

    my @what;
    my $why;
    my %feature;

    # load the test case file definition
    if(loadtest("${TESTDIR}/test${testnum}")) {
        if($verbose) {
            # this is not a test
            print "RUN: $testnum doesn't look like a test case!\n";
        }
        $why = "no test";
    }
    else {
        @what = getpart("client", "features");
    }

    for(@what) {
        my $f = $_;
        $f =~ s/\s//g;

        $feature{$f}=$f; # we require this feature

        if($f eq "SSL") {
            if($ssl_version) {
                next;
            }
        }
        elsif($f eq "netrc_debug") {
            if($curl_debug) {
                next;
            }
        }
        elsif($f eq "large_file") {
            if($large_file) {
                next;
            }
        }
        elsif($f eq "idn") {
            if($has_idn) {
                next;
            }
        }
        elsif($f eq "ipv6") {
            if($has_ipv6) {
                next;
            }
        }
        elsif($f eq "libz") {
            if($has_libz) {
                next;
            }
        }
        elsif($f eq "getrlimit") {
            if($has_getrlimit) {
                next;
            }
        }

        $why = "curl lacks $f support";
        last;
    }

    if(!$why) {
        $why = serverfortest($testnum);
    }

    if(!$why) {
        my @precheck = getpart("client", "precheck");
        my $cmd = $precheck[0];
        chomp $cmd;
        if($cmd) {
            my @o = `$cmd 2>/dev/null`;
            if($o[0]) {
                $why = $o[0];
                chomp $why;
            }
        }
    }

    if($why) {
        # there's a problem, count it as "skipped"
        $skipped++;
        $skipped{$why}++;
        $teststat[$testnum]=$why; # store reason for this test case

        if(!$short) {
            printf "test %03d SKIPPED: $why\n", $testnum;
        }

        return -1;
    }