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revision 1.45, Mon May 8 20:37:02 2006 UTC revision 1.76, Fri Oct 6 15:39:58 2006 UTC
# Line 19  Line 19 
19    
20      require Exporter;      require Exporter;
21      @ISA = ('Exporter');      @ISA = ('Exporter');
22      @EXPORT = qw(Trace T TSetup QTrace Confess Cluck Min Max Assert Open OpenDir TICK StandardSetup ScriptSetup ScriptFinish Insure ChDir);      @EXPORT = qw(Trace T TSetup QTrace Confess Cluck Min Max Assert Open OpenDir TICK StandardSetup EmergencyKey ETracing ScriptSetup ScriptFinish Insure ChDir Emergency);
23      @EXPORT_OK = qw(GetFile GetOptions Merge MergeOptions ParseCommand ParseRecord UnEscape Escape);      @EXPORT_OK = qw(GetFile GetOptions Merge MergeOptions ParseCommand ParseRecord UnEscape Escape);
24      use strict;      use strict;
25      use Carp qw(longmess croak);      use Carp qw(longmess croak);
26      use CGI;      use CGI;
27        use Cwd;
28      use FIG_Config;      use FIG_Config;
29      use PageBuilder;      use PageBuilder;
30      use Digest::MD5;      use Digest::MD5;
31      use File::Basename;      use File::Basename;
32      use File::Path;      use File::Path;
33        use File::stat;
34        use LWP::UserAgent;
35        use Time::HiRes 'gettimeofday';
36        use URI::Escape;
37        use Time::Local;
38    
39  =head1 Tracing and Debugging Helpers  =head1 Tracing and Debugging Helpers
40    
41  =head2 Introduction  =head2 Tracing
42    
43  This package provides simple tracing for debugging and reporting purposes. To use it simply call the  This package provides simple tracing for debugging and reporting purposes. To use it simply call the
44  L</TSetup> method to set the options and call L</Trace> to write out trace messages. Each trace  L</TSetup> or L</ETracing> method to set the options and call L</Trace> to write out trace messages.
45  message has a I<trace level> and I<category> associated with it. In addition, the tracing package itself  L</TSetup> and L</ETracing> both establish a I<trace level> and a list of I<categories>. Similarly,
46  has a list of categories and a single trace level set by the B<TSetup> method. Only messages whose trace  each trace message has a I<trace level> and I<category> associated with it. Only messages whose trace
47  level is less than or equal to this package's trace level and whose category is activated will  level is less than or equal to the setup trace level and whose category is activated will
48  be written. Thus, a higher trace level on a message indicates that the message  be written. Thus, a higher trace level on a message indicates that the message
49  is less likely to be seen. A higher trace level passed to B<TSetup> means more trace messages will  is less likely to be seen, while a higher trace level passed to B<TSetup> means more trace messages will
50  appear. To generate a trace message, use the following syntax.  appear.
51    
52  C<< Trace($message) if T(errors => 4); >>  =head3 Putting Trace Messages in Your Code
53    
54    To generate a trace message, use the following syntax.
55    
56        Trace($message) if T(errors => 4);
57    
58  This statement will produce a trace message if the trace level is 4 or more and the C<errors>  This statement will produce a trace message if the trace level is 4 or more and the C<errors>
59  category is active. Note that the special category C<main> is always active, so  category is active. There is a special category C<main> that is always active, so
60    
61  C<< Trace($message) if T(main => 4); >>      Trace($message) if T(main => 4);
62    
63  will trace if the trace level is 4 or more.  will trace if the trace level is 4 or more.
64    
# Line 56  Line 66 
66  following call is made in the B<Sprout> package, it will appear if the C<Sprout> category is  following call is made in the B<Sprout> package, it will appear if the C<Sprout> category is
67  active and the trace level is 2 or more.  active and the trace level is 2 or more.
68    
69  C<< Trace($message) if T(2); >>      Trace($message) if T(2);
70    
71    In scripts, where no package name is available, the category defaults to C<main>.
72    
73    =head3 Custom Tracing
74    
75  To set up tracing, you call the L</TSetup> method. The method takes as input a trace level, a list  Many programs have customized tracing configured using the L</TSetup> method. This is no longer
76  of category names, and a set of options. The trace level and list of category names are  the preferred method, but a knowledge of how custom tracing works can make the more modern
77    L</Emergency Tracing> easier to understand.
78    
79    To set up custom tracing, you call the L</TSetup> method. The method takes as input a trace level,
80    a list of category names, and a destination. The trace level and list of category names are
81  specified as a space-delimited string. Thus  specified as a space-delimited string. Thus
82    
83  C<< TSetup('3 errors Sprout ERDB', 'HTML'); >>      TSetup('3 errors Sprout ERDB', 'TEXT');
84    
85  sets the trace level to 3, activates the C<errors>, C<Sprout>, and C<ERDB> categories, and  sets the trace level to 3, activates the C<errors>, C<Sprout>, and C<ERDB> categories, and
86  specifies that messages should be output as HTML paragraphs.  specifies that messages should be sent to the standard output.
87    
88  To turn on tracing for ALL categories, use an asterisk. The call below sets every category to  To turn on tracing for ALL categories, use an asterisk. The call below sets every category to
89  level 3 and writes the output to the standard error output. This sort of thing might be  level 3 and writes the output to the standard error output. This sort of thing might be
90  useful in a CGI environment.  useful in a CGI environment.
91    
92  C<< TSetup('3 *', 'WARN'); >>      TSetup('3 *', 'WARN');
93    
94  In addition to HTML and file output for trace messages, you can specify that the trace messages  In addition standard error and file output for trace messages, you can specify that the trace messages
95  be queued. The messages can then be retrieved by calling the L</QTrace> method. This approach  be queued. The messages can then be retrieved by calling the L</QTrace> method. This approach
96  is useful if you are building a web page. Instead of having the trace messages interspersed with  is useful if you are building a web page. Instead of having the trace messages interspersed with
97  the page output, they can be gathered together and displayed at the end of the page. This makes  the page output, they can be gathered together and displayed at the end of the page. This makes
98  it easier to debug page formatting problems.  it easier to debug page formatting problems.
99    
100  Finally, you can specify that all trace messages be emitted as warnings.  Finally, you can specify that all trace messages be emitted to a file, or the standard output and
101    a file at the same time. To trace to a file, specify the filename with an output character in front
102    of it.
103    
104        TSetup('4 SQL', ">$fileName");
105    
106    To trace to the standard output and a file at the same time, put a C<+> in front of the angle
107    bracket.
108    
109        TSetup('3 *', "+>$fileName");
110    
111  The flexibility of tracing makes it superior to simple use of directives like C<die> and C<warn>.  The flexibility of tracing makes it superior to simple use of directives like C<die> and C<warn>.
112  Tracer calls can be left in the code with minimal overhead and then turned on only when needed.  Tracer calls can be left in the code with minimal overhead and then turned on only when needed.
113  Thus, debugging information is available and easily retrieved even when the application is  Thus, debugging information is available and easily retrieved even when the application is
114  being used out in the field.  being used out in the field.
115    
116    =head3 Trace Levels
117    
118  There is no hard and fast rule on how to use trace levels. The following is therefore only  There is no hard and fast rule on how to use trace levels. The following is therefore only
119  a suggestion.  a suggestion.
120    
# Line 116  Line 145 
145    
146  =back  =back
147    
148    The format of trace messages is important because some utilities analyze trace files.
149    There are three fields-- the time stamp, the category name, and the text.
150    The time stamp is between square brackets and the category name between angle brackets.
151    After the category name there is a colon (C<:>) followed by the message text.
152    If the square brackets or angle brackets are missing, then the trace management
153    utilities assume that they are encountering a set of pre-formatted lines.
154    
155    Note, however, that this formatting is done automatically by the tracing functions. You
156    only need to know about it if you want to parse a trace file.
157    
158    =head3 Emergency Tracing
159    
160    Sometimes, you need a way for tracing to happen automatically without putting parameters
161    in a form or on the command line. Emergency tracing does this. You invoke emergency tracing
162    from the debug form, which is accessed from I<MySeedInstance>C</FIG/Html/SetPassword.html>.
163    Emergency tracing requires you specify a tracing key. For command-line tools, the key is
164    taken from the C<TRACING> environment variable. For web services, the key is taken from
165    a cookie. Either way, the key tells the tracing facility who you are, so that you control
166    the tracing in your environment without stepping on other users.
167    
168    The key can be anything you want. If you don't have a key, the C<SetPassword> page will
169    generate one for you.
170    
171    You can activate and de-activate emergency tracing from the debugging control panel, as
172    well as display the trace file itself.
173    
174    To enable emergency tracing in your code, call
175    
176        ETracing($cgi)
177    
178    from a web script and
179    
180        ETracing()
181    
182    from a command-line script.
183    
184    The web script will look for the tracing key in the cookies, and the command-line
185    script will look for it in the C<TRACING> environment variable. If you are
186    using the L</StandardScript> or L</StandardSetup> methods, emergency tracing
187    will be configured automatically.
188    
189    =head3 Debugging Control Panel
190    
191    The debugging control panel provides several tools to assist in development of
192    SEED and Sprout software. You access the debugging control panel from the URL
193    C</FIG/Html/SetPassword.html> in whichever seed instance you're using. (So,
194    for example, the panel access point for the development NMPDR system is
195    C<http://web-1.nmpdr.org/next/FIG/Html/SetPassword.html>. Contact Bruce to
196    find out what the password is. From this page, you can also specify a tracing
197    key. If you don't specify a key, one will be generated for you.
198    
199    =head4 Emergency Tracing Form
200    
201    At the bottom of the debugging control panel is a form that allows you to
202    specify a trace level and tracing categories. Special and common categories
203    are listed with check boxes. You can hold your mouse over a check box to see
204    what its category does. In general, however, a category name is the same as
205    the name of the package in which the trace message occurs.
206    
207    Additional categories can be entered in an input box, delimited by spaces or commas.
208    
209    The B<Activate> button turns on Emergency tracing at the level you specify with the
210    specified categories active. The B<Terminate> button turns tracing off. The
211    B<Show File> button displays the current contents of the trace file. The tracing
212    form at the bottom of the control panel is designed for emergency tracing, so it
213    will only affect programs that call L</ETracing>, L</StandardScript>,
214    or L</StandardSetup>.
215    
216    =head4 Script Form
217    
218    The top form of the debugging control panel allows you to enter a tiny script and
219    have the output generated in a formatted table. Certain object variables are
220    predefined in the script, including a FIG object (C<$fig>), a CGI object (C<$cgi>),
221    and-- if Sprout is active-- Sprout (C<$sprout>) and SFXlate (C<$sfx>) objects.
222    
223    The last line of the script must be a scalar, but it can be a reference to a hash,
224    a list, a list of lists, and various other combinations. If you select the appropriate
225    data type in the dropdown box, the output will be formatted accordingly. The form
226    also has controls for specifying tracing. These controls override any emergency
227    tracing in effect.
228    
229    =head4 Database Query Forms
230    
231    The forms between the script form and the emergency tracing form allow you to
232    make queries against the database. The FIG query form allows simple queries against
233    a single FIG table. The Sprout query form uses the B<GetAll> method to do a
234    multi-table query against the Sprout database. B<GetAll> is located in the B<ERDB>
235    package, and it takes five parameters.
236    
237        GetAll(\@objectNames, $filterClause, \@parameters, \@fields, $count);
238    
239    Each of the five parameters corresponds to a text box on the query form:
240    
241    =over 4
242    
243    =item Objects
244    
245    Comma-separated list containing the names of the entity and relationship objects to be retrieved.
246    
247    =item Filter
248    
249    WHERE/ORDER BY clause (without the WHERE) to be used to filter and sort the query. The WHERE clause can
250    be parameterized with parameter markers (C<?>). Each field used must be specified in the standard form
251    B<I<objectName>(I<fieldName>)> or B<$I<number>(I<fieldName>)> where I<fieldName> is the name of a
252    field, I<objectName> is the name of the entity or relationship object containing the field, and
253    I<number> is the 1-based position of the object in the object list. Any parameters
254    specified in the filter clause should be specified in the B<Params> field.
255    The fields in a filter clause can come from primary entity relations,
256    relationship relations, or secondary entity relations; however, all of the
257    entities and relationships involved must be included in the list of object names.
258    
259    =item Params
260    
261    List of the parameters to be substituted in for the parameters marks in the filter clause. This
262    is a comma-separated list without any quoting or escaping.
263    
264    =item fields
265    
266    Comma-separated list of the fields to be returned in each element of the list returned. Fields
267    are specified in the same manner as in the filter clause.
268    
269    =item count
270    
271    Maximum number of records to return. If omitted or 0, all available records will be returned.
272    
273    =back
274    
275    B<GetAll> automatically joins together the entities and relationships listed in the object
276    names. This simplifies the coding of the filter clause, but it means that some queries are
277    not possible, since they cannot be expressed in a linear sequence of joins. This is a limitation
278    that has yet to be addressed.
279    
280  =cut  =cut
281    
282  # Declare the configuration variables.  # Declare the configuration variables.
# Line 195  Line 356 
356          }          }
357          if ($target =~ m/^>[^>]/) {          if ($target =~ m/^>[^>]/) {
358              open TRACEFILE, $target;              open TRACEFILE, $target;
359              print TRACEFILE Now() . " Tracing initialized.\n";              print TRACEFILE "[" . Now() . "] <Tracer>: Tracing initialized.\n";
360              close TRACEFILE;              close TRACEFILE;
361              $Destination = ">$target";              $Destination = ">$target";
362          } else {          } else {
# Line 228  Line 389 
389      ["Sprout", "SproutLoad", "ERDB"]      ["Sprout", "SproutLoad", "ERDB"]
390    
391  This would cause trace messages in the specified three packages to appear in  This would cause trace messages in the specified three packages to appear in
392  the output. There are threer special tracing categories that are automatically  the output. There are two special tracing categories that are automatically
393  handled by this method. In other words, if you used L</TSetup> you would need  handled by this method. In other words, if you used L</TSetup> you would need
394  to include these categories manually, but if you use this method they are turned  to include these categories manually, but if you use this method they are turned
395  on automatically.  on automatically.
396    
397  =over 4  =over 4
398    
 =item FIG  
   
 Turns on trace messages inside the B<FIG> package.  
   
399  =item SQL  =item SQL
400    
401  Traces SQL commands and activity.  Traces SQL commands and activity.
# Line 303  Line 460 
460  In this case, C<register>, C<../xacts>, and C<IDs.tbl> are the positional  In this case, C<register>, C<../xacts>, and C<IDs.tbl> are the positional
461  parameters, and would find themselves in I<@parameters> after executing the  parameters, and would find themselves in I<@parameters> after executing the
462  above code fragment. The tracing would be set to level 2, and the categories  above code fragment. The tracing would be set to level 2, and the categories
463  would be C<FIG>, C<Tracer>, and <DocUtils>. C<FIG> and C<Tracer> are standard,  would be C<Tracer>, and <DocUtils>. C<Tracer> is standard,
464  and C<DocUtils> was included because it came in within the first parameter  and C<DocUtils> was included because it came in within the first parameter
465  to this method. The I<$options> hash would be  to this method. The I<$options> hash would be
466    
# Line 328  Line 485 
485  C<outBruce.log>, and the error output to C<errBruce.log>. This is designed to  C<outBruce.log>, and the error output to C<errBruce.log>. This is designed to
486  simplify starting a command in the background.  simplify starting a command in the background.
487    
488    The user name is also used as the tracing key for L</Emergency Tracing>.
489    Specifying a value of C<E> for the trace level causes emergency tracing to
490    be used instead of custom tracing. If the user name is not specified,
491    the tracing key is taken from the C<Tracing> environment variable. If there
492    is no value for that variable, the tracing key will be computed from the PID.
493    
494  Finally, if the special option C<-h> is specified, the option names will  Finally, if the special option C<-h> is specified, the option names will
495  be traced at level 0 and the program will exit without processing.  be traced at level 0 and the program will exit without processing.
496  This provides a limited help capability. For example, if the user enters  This provides a limited help capability. For example, if the user enters
# Line 337  Line 500 
500  he would see the following output.  he would see the following output.
501    
502      TransactFeatures [options] command transactionDirectory IDfile      TransactFeatures [options] command transactionDirectory IDfile
503          -trace    tracing level (default 2)          -trace    tracing level (default E)
504          -sql      trace SQL commands          -sql      trace SQL commands
505          -safe     use database transactions          -safe     use database transactions
506          -noAlias  do not expect aliases in CHANGE transactions          -noAlias  do not expect aliases in CHANGE transactions
# Line 352  Line 515 
515      { trace => [0, "tracing level (default 0)"],      { trace => [0, "tracing level (default 0)"],
516         ...         ...
517    
518  would set the default trace level to 0 instead of 2, while  would set the default trace level to 0 instead of E, while
519    
520      { trace => ["2-", "tracing level (default 2)"],      { trace => ["2-", "tracing level (default 2)"],
521         ...         ...
522    
523  would leave the default at 2, but trace only to the log file, not to the  would set the default to 2, but trace only to the log file, not to the
524  standard output.  standard output.
525    
526  The parameters to this method are as follows.  The parameters to this method are as follows.
# Line 404  Line 567 
567  sub StandardSetup {  sub StandardSetup {
568      # Get the parameters.      # Get the parameters.
569      my ($categories, $options, $parmHelp, @argv) = @_;      my ($categories, $options, $parmHelp, @argv) = @_;
570        # Get the default tracing key.
571        my $tkey = EmergencyKey();
572      # Add the tracing options.      # Add the tracing options.
573      if (! exists $options->{trace}) {      if (! exists $options->{trace}) {
574          $options->{trace} = [2, "tracing level"];          $options->{trace} = ['E', "tracing level (E for emergency tracing)"];
575      }      }
576      $options->{sql} = [0, "turn on SQL tracing"];      $options->{sql} = [0, "turn on SQL tracing"];
577      $options->{h} = [0, "display command-line options"];      $options->{h} = [0, "display command-line options"];
578      $options->{user} = [$$, "trace log file name suffix"];      $options->{user} = [$tkey, "tracing key"];
579      $options->{background} = [0, "spool standard and error output"];      $options->{background} = [0, "spool standard and error output"];
580      # Create a parsing hash from the options hash. The parsing hash      # Create a parsing hash from the options hash. The parsing hash
581      # contains the default values rather than the default value      # contains the default values rather than the default value
# Line 435  Line 600 
600          open STDOUT, ">$outFileName";          open STDOUT, ">$outFileName";
601          open STDERR, ">$errFileName";          open STDERR, ">$errFileName";
602      }      }
603      # Now we want to set up tracing. First, we need to know if SQL is to      # Now we want to set up tracing. First, we need to know if the user
604      # be traced.      # wants emergency tracing.
605        if ($retOptions->{trace} eq 'E') {
606            ETracing($retOptions->{user});
607        } else {
608            # Here the tracing is controlled from the command line.
609      my @cats = @{$categories};      my @cats = @{$categories};
610      if ($retOptions->{sql}) {      if ($retOptions->{sql}) {
611          push @cats, "SQL";          push @cats, "SQL";
612      }      }
613      # Add the default categories.      # Add the default categories.
614      push @cats, "Tracer", "FIG";          push @cats, "Tracer";
615      # Next, we create the category string by joining the categories.      # Next, we create the category string by joining the categories.
616      my $cats = join(" ", @cats);      my $cats = join(" ", @cats);
617      # Check to determine whether or not the caller wants to turn off tracing      # Check to determine whether or not the caller wants to turn off tracing
# Line 477  Line 646 
646      }      }
647      # Now set up the tracing.      # Now set up the tracing.
648      TSetup("$traceLevel $cats", $traceMode);      TSetup("$traceLevel $cats", $traceMode);
649        }
650      # Check for the "h" option. If it is specified, dump the command-line      # Check for the "h" option. If it is specified, dump the command-line
651      # options and exit the program.      # options and exit the program.
652      if ($retOptions->{h}) {      if ($retOptions->{h}) {
653          $0 =~ m#[/\\](\w+)(\.pl)?$#i;          $0 =~ m#[/\\](\w+)(\.pl)?$#i;
654          Trace("$1 [options] $parmHelp") if T(0);          print "$1 [options] $parmHelp\n";
655          for my $key (sort keys %{$options}) {          for my $key (sort keys %{$options}) {
656              my $name = Pad($key, $longestName, 0, ' ');              my $name = Pad($key, $longestName, 0, ' ');
657              my $desc = $options->{$key}->[1];              my $desc = $options->{$key}->[1];
658              if ($options->{$key}->[0]) {              if ($options->{$key}->[0]) {
659                  $desc .= " (default " . $options->{$key}->[0] . ")";                  $desc .= " (default " . $options->{$key}->[0] . ")";
660              }              }
661              Trace("  $name $desc") if T(0);              print "  $name $desc\n";
662          }          }
663          exit(0);          exit(0);
664      }      }
# Line 762  Line 932 
932      return $value;      return $value;
933  }  }
934    
935    =head3 ParseTraceDate
936    
937    C<< my $time = Tracer::ParseTraceDate($dateString); >>
938    
939    Convert a date from the trace file into a PERL timestamp.
940    
941    =over 4
942    
943    =item dateString
944    
945    The date string from the trace file. The format of the string is determined by the
946    L</Now> method.
947    
948    =item RETURN
949    
950    Returns a PERL time, that is, a number of seconds since the epoch, or C<undef> if
951    the time string is invalid.
952    
953    =cut
954    
955    sub ParseTraceDate {
956        # Get the parameters.
957        my ($dateString) = @_;
958        # Declare the return variable.
959        my $retVal;
960        # Parse the date.
961        if ($dateString =~ m#(\d+)/(\d+)/(\d+)\s+(\d+):(\d+):(\d+)#) {
962            # Create a time object. Note we need to convert the day, month,
963            # and year to a different base. Years count from 1900, and
964            # the internal month value is relocated to January = 0.
965            $retVal = timelocal($6, $5, $4, $2, $1 - 1, $3 - 1900);
966        }
967        # Return the result.
968        return $retVal;
969    }
970    
971  =head3 LogErrors  =head3 LogErrors
972    
973  C<< Tracer::LogErrors($fileName); >>  C<< Tracer::LogErrors($fileName); >>
# Line 964  Line 1170 
1170      # Get the timestamp.      # Get the timestamp.
1171      my $timeStamp = Now();      my $timeStamp = Now();
1172      # Format the message. Note we strip off any line terminators at the end.      # Format the message. Note we strip off any line terminators at the end.
1173      my $formatted = "$timeStamp <$LastCategory>: " . Strip($message);      my $formatted = "[$timeStamp] <$LastCategory>: " . Strip($message);
1174      # Process according to the destination.      # Process according to the destination.
1175      if ($Destination eq "TEXT") {      if ($Destination eq "TEXT") {
1176          # Write the message to the standard output.          # Write the message to the standard output.
# Line 1346  Line 1552 
1552      return @inputList;      return @inputList;
1553  }  }
1554    
1555    =head3 Percent
1556    
1557    C<< my $percent = Tracer::Percent($number, $base); >>
1558    
1559    Returns the percent of the base represented by the given number. If the base
1560    is zero, returns zero.
1561    
1562    =over 4
1563    
1564    =item number
1565    
1566    Percent numerator.
1567    
1568    =item base
1569    
1570    Percent base.
1571    
1572    =item RETURN
1573    
1574    Returns the percentage of the base represented by the numerator.
1575    
1576    =back
1577    
1578    =cut
1579    
1580    sub Percent {
1581        # Get the parameters.
1582        my ($number, $base) = @_;
1583        # Declare the return variable.
1584        my $retVal = 0;
1585        # Compute the percent.
1586        if ($base != 0) {
1587            $retVal = $number * 100 / $base;
1588        }
1589        # Return the result.
1590        return $retVal;
1591    }
1592    
1593  =head3 GetFile  =head3 GetFile
1594    
1595  C<< my @fileContents = Tracer::GetFile($fileName); >>  C<< my @fileContents = Tracer::GetFile($fileName); >>
# Line 1379  Line 1623 
1623      # Declare the return variable.      # Declare the return variable.
1624      my @retVal = ();      my @retVal = ();
1625      # Open the file for input.      # Open the file for input.
1626      my $ok = open INPUTFILE, "<$fileName";      my $handle = Open(undef, "<$fileName");
     if (!$ok) {  
         # If we had an error, trace it. We will automatically return a null value.  
         Trace("Could not open \"$fileName\" for input: $!") if T(0);  
     } else {  
1627          # Read the whole file into the return variable, stripping off any terminator          # Read the whole file into the return variable, stripping off any terminator
1628          # characters.          # characters.
1629          my $lineCount = 0;          my $lineCount = 0;
1630          while (my $line = <INPUTFILE>) {      while (my $line = <$handle>) {
1631              $lineCount++;              $lineCount++;
1632              $line = Strip($line);              $line = Strip($line);
1633              push @retVal, $line;              push @retVal, $line;
1634          }          }
1635          # Close it.          # Close it.
1636          close INPUTFILE;      close $handle;
1637          my $actualLines = @retVal;          my $actualLines = @retVal;
     }  
1638      # Return the file's contents in the desired format.      # Return the file's contents in the desired format.
1639      if (wantarray) {      if (wantarray) {
1640          return @retVal;          return @retVal;
# Line 1404  Line 1643 
1643      }      }
1644  }  }
1645    
1646    =head3 PutFile
1647    
1648    C<< Tracer::PutFile($fileName, \@lines); >>
1649    
1650    Write out a file from a list of lines of text.
1651    
1652    =over 4
1653    
1654    =item fileName
1655    
1656    Name of the output file.
1657    
1658    =item lines
1659    
1660    Reference to a list of text lines. The lines will be written to the file in order, with trailing
1661    new-line characters. Alternatively, may be a string, in which case the string will be written without
1662    modification.
1663    
1664    =back
1665    
1666    =cut
1667    
1668    sub PutFile {
1669        # Get the parameters.
1670        my ($fileName, $lines) = @_;
1671        # Open the output file.
1672        my $handle = Open(undef, ">$fileName");
1673        if (ref $lines ne 'ARRAY') {
1674            # Here we have a scalar, so we write it raw.
1675            print $handle $lines;
1676        } else {
1677            # Write the lines one at a time.
1678            for my $line (@{$lines}) {
1679                print $handle "$line\n";
1680            }
1681        }
1682        # Close the output file.
1683        close $handle;
1684    }
1685    
1686  =head3 QTrace  =head3 QTrace
1687    
1688  C<< my $data = QTrace($format); >>  C<< my $data = QTrace($format); >>
# Line 1604  Line 1883 
1883    
1884  =head3 AddToListMap  =head3 AddToListMap
1885    
1886  C<< Tracer::AddToListMap(\%hash, $key, $value); >>  C<< Tracer::AddToListMap(\%hash, $key, $value1, $value2, ... valueN); >>
1887    
1888  Add a key-value pair to a hash of lists. If no value exists for the key, a singleton list  Add a key-value pair to a hash of lists. If no value exists for the key, a singleton list
1889  is created for the key. Otherwise, the new value is pushed onto the list.  is created for the key. Otherwise, the new value is pushed onto the list.
# Line 1619  Line 1898 
1898    
1899  Key for which the value is to be added.  Key for which the value is to be added.
1900    
1901  =item value  =item value1, value2, ... valueN
1902    
1903  Value to add to the key's value list.  List of values to add to the key's value list.
1904    
1905  =back  =back
1906    
# Line 1629  Line 1908 
1908    
1909  sub AddToListMap {  sub AddToListMap {
1910      # Get the parameters.      # Get the parameters.
1911      my ($hash, $key, $value) = @_;      my ($hash, $key, @values) = @_;
1912      # Process according to whether or not the key already has a value.      # Process according to whether or not the key already has a value.
1913      if (! exists $hash->{$key}) {      if (! exists $hash->{$key}) {
1914          $hash->{$key} = [$value];          $hash->{$key} = [@values];
1915      } else {      } else {
1916          push @{$hash->{$key}}, $value;          push @{$hash->{$key}}, @values;
1917      }      }
1918  }  }
1919    
# Line 1642  Line 1921 
1921    
1922  C<< if (Tracer::DebugMode) { ...code... } >>  C<< if (Tracer::DebugMode) { ...code... } >>
1923    
1924  Return TRUE if debug mode has been turned on, else output an error  Return TRUE if debug mode has been turned on, else abort.
 page and return FALSE.  
1925    
1926  Certain CGI scripts are too dangerous to exist in the production  Certain CGI scripts are too dangerous to exist in the production
1927  environment. This method provides a simple way to prevent them  environment. This method provides a simple way to prevent them
1928  from working unless they are explicitly turned on by creating a password  from working unless they are explicitly turned on by creating a password
1929  cookie via the B<SetPassword> script.  If debugging mode  cookie via the B<SetPassword> script.  If debugging mode
1930  is not turned on, an error web page will be output directing the  is not turned on, an error will occur.
 user to enter in the correct password.  
1931    
1932  =cut  =cut
1933    
# Line 1663  Line 1940 
1940      if ($encrypted eq "252dec43280e0c0d6a75ffcec486e61d") {      if ($encrypted eq "252dec43280e0c0d6a75ffcec486e61d") {
1941          $retVal = 1;          $retVal = 1;
1942      } else {      } else {
1943          # Here debug mode is off, so we generate an error page.          # Here debug mode is off, so we generate an error.
1944          my $pageString = PageBuilder::Build("<Html/ErrorPage.html", {}, "Html");          Confess("Cannot use this facility without logging in.");
         print $pageString;  
1945      }      }
1946      # Return the determination indicator.      # Return the determination indicator.
1947      return $retVal;      return $retVal;
# Line 1817  Line 2093 
2093    
2094  =head3 ScriptSetup  =head3 ScriptSetup
2095    
2096  C<< my ($query, $varHash) = ScriptSetup(); >>  C<< my ($cgi, $varHash) = ScriptSetup($noTrace); >>
2097    
2098  Perform standard tracing and debugging setup for scripts. The value returned is  Perform standard tracing and debugging setup for scripts. The value returned is
2099  the CGI object followed by a pre-built variable hash.  the CGI object followed by a pre-built variable hash.
2100    
2101  The C<Trace> query parameter is used to determine whether or not tracing is active and  The C<Trace> form parameter is used to determine whether or not tracing is active and
2102  which trace modules (other than C<Tracer> and C<FIG>) should be turned on. Specifying  which trace modules (other than C<Tracer> itself) should be turned on. Specifying
2103  the C<CGI> trace module will trace parameter and environment information. Parameters are  the C<CGI> trace module will trace parameter and environment information. Parameters are
2104  traced at level 3 and environment variables at level 4. At the end of the script, the  traced at level 3 and environment variables at level 4. To trace to a file instead of to
2105  client should call L</ScriptFinish> to output the web page.  the web page, set C<TF> to 1. At the end of the script, the client should call
2106    L</ScriptFinish> to output the web page.
2107    
2108    In some situations, it is not practical to invoke tracing via form parameters. For this
2109    situation, you can turn on emergency tracing from the debugging control panel.
2110    Tracing will then be turned on automatically for all programs that use the L</ETracing>
2111    method, which includes every program that uses this method or L</StandardSetup>.
2112    
2113    =over 4
2114    
2115    =item noTrace (optional)
2116    
2117    If specified, tracing will be suppressed. This is useful if the script wants to set up
2118    tracing manually.
2119    
2120    =item RETURN
2121    
2122    Returns a two-element list consisting of a CGI query object and a variable hash for
2123    the output page.
2124    
2125    =back
2126    
2127  =cut  =cut
2128    
2129  sub ScriptSetup {  sub ScriptSetup {
2130        # Get the parameters.
2131        my ($noTrace) = @_;
2132      # Get the CGI query object.      # Get the CGI query object.
2133      my $query = CGI->new();      my $cgi = CGI->new();
2134      # Check for tracing. Set it up if the user asked for it.      # Set up tracing if it's not suppressed.
2135      if ($query->param('Trace')) {      ETracing($cgi) unless $noTrace;
2136          # Set up tracing to be queued for display at the bottom of the web page.      # Create the variable hash.
2137          TSetup($query->param('Trace') . " FIG Tracer", "QUEUE");      my $varHash = { results => '' };
2138          # Trace the parameter and environment data.      # Return the query object and variable hash.
2139        return ($cgi, $varHash);
2140    }
2141    
2142    =head3 ETracing
2143    
2144    C<< ETracing($parameter); >>
2145    
2146    Set up emergency tracing. Emergency tracing is tracing that is turned
2147    on automatically for any program that calls this method. The emergency
2148    tracing parameters are stored in a a file identified by a tracing key.
2149    If this method is called with a CGI object, then the tracing key is
2150    taken from a cookie. If it is called with no parameters, then the tracing
2151    key is taken from an environment variable. If it is called with a string,
2152    the tracing key is that string.
2153    
2154    =over 4
2155    
2156    =item parameter
2157    
2158    A parameter from which the tracing key is computed. If it is a scalar,
2159    that scalar is used as the tracing key. If it is a CGI object, the
2160    tracing key is taken from the C<IP> cookie. If it is omitted, the
2161    tracing key is taken from the C<TRACING> environment variable. If it
2162    is a CGI object and emergency tracing is not on, the C<Trace> and
2163    C<TF> parameters will be used to determine the type of tracing.
2164    
2165    =back
2166    
2167    =cut
2168    
2169    sub ETracing {
2170        # Get the parameter.
2171        my ($parameter) = @_;
2172        # Check for CGI mode.
2173        my $cgi = (ref $parameter eq 'CGI' ? $parameter : undef);
2174        # Default to no tracing except errors.
2175        my ($tracing, $dest) = ("0", "WARN");
2176        # Check for emergency tracing.
2177        my $tkey = EmergencyKey($parameter);
2178        my $emergencyFile = EmergencyFileName($tkey);
2179        if (-e $emergencyFile) {
2180            # We have the file. Read in the data.
2181            my @tracing = GetFile($emergencyFile);
2182            # Pull off the time limit.
2183            my $expire = shift @tracing;
2184            # Convert it to seconds.
2185            $expire *= 3600;
2186            # Check the file data.
2187            my $stat = stat($emergencyFile);
2188            my ($now) = gettimeofday;
2189            if ($now - $stat->mtime > $expire) {
2190                # Delete the expired file.
2191                unlink $emergencyFile;
2192            } else {
2193                # Emergency tracing is on. Pull off the destination and
2194                # the trace level;
2195                $dest = shift @tracing;
2196                my $level = shift @tracing;
2197                # Convert the destination to a real tracing destination.
2198                # temp directory.
2199                $dest = EmergencyTracingDest($tkey, $dest);
2200                # Insure Tracer is specified.
2201                my %moduleHash = map { $_ => 1 } @tracing;
2202                $moduleHash{Tracer} = 1;
2203                # Set the trace parameter.
2204                $tracing = join(" ", $level, sort keys %moduleHash);
2205            }
2206        } elsif (defined $cgi) {
2207            # There's no emergency tracing, but we have a CGI object, so check
2208            # for tracing from the form parameters.
2209            if ($cgi->param('Trace')) {
2210                # Here the user has requested tracing via a form.
2211                $dest = ($cgi->param('TF') ? ">$FIG_Config::temp/Trace$$.log" : "QUEUE");
2212                $tracing = $cgi->param('Trace') . " Tracer";
2213            }
2214        }
2215        # Setup the tracing we've determined from all the stuff above.
2216        TSetup($tracing, $dest);
2217        # If we're a web script, trace the parameter and environment data.
2218        if (defined $cgi) {
2219            TraceParms($cgi);
2220        }
2221    }
2222    
2223    =head3 EmergencyFileName
2224    
2225    C<< my $fileName = Tracer::EmergencyFileName($tkey); >>
2226    
2227    Return the emergency tracing file name. This is the file that specifies
2228    the tracing information.
2229    
2230    =over 4
2231    
2232    =item tkey
2233    
2234    Tracing key for the current program.
2235    
2236    =item RETURN
2237    
2238    Returns the name of the file to contain the emergency tracing information.
2239    
2240    =back
2241    
2242    =cut
2243    
2244    sub EmergencyFileName {
2245        # Get the parameters.
2246        my ($tkey) = @_;
2247        # Compute the emergency tracing file name.
2248        return "$FIG_Config::temp/Emergency$tkey.txt";
2249    }
2250    
2251    =head3 EmergencyFileTarget
2252    
2253    C<< my $fileName = Tracer::EmergencyFileTarget($tkey); >>
2254    
2255    Return the emergency tracing target file name. This is the file that receives
2256    the tracing output for file-based tracing.
2257    
2258    =over 4
2259    
2260    =item tkey
2261    
2262    Tracing key for the current program.
2263    
2264    =item RETURN
2265    
2266    Returns the name of the file to contain the trace output.
2267    
2268    =back
2269    
2270    =cut
2271    
2272    sub EmergencyFileTarget {
2273        # Get the parameters.
2274        my ($tkey) = @_;
2275        # Compute the emergency tracing file name.
2276        return "$FIG_Config::temp/trace$tkey.log";
2277    }
2278    
2279    =head3 EmergencyTracingDest
2280    
2281    C<< my $dest = Tracer::EmergencyTracingDest($tkey, $myDest); >>
2282    
2283    This method converts an emergency tracing destination to a real
2284    tracing destination. The main difference is that if the
2285    destination is C<FILE> or C<APPEND>, we convert it to file
2286    output.
2287    
2288    =over 4
2289    
2290    =item tkey
2291    
2292    Tracing key for this environment.
2293    
2294    =item myDest
2295    
2296    Destination from the emergency tracing file.
2297    
2298    =item RETURN
2299    
2300    Returns a destination that can be passed into L</TSetup>.
2301    
2302    =back
2303    
2304    =cut
2305    
2306    sub EmergencyTracingDest {
2307        # Get the parameters.
2308        my ($tkey, $myDest) = @_;
2309        # Declare the return variable.
2310        my $retVal;
2311        # Process according to the destination value.
2312        if ($myDest eq 'FILE') {
2313            $retVal = ">" . EmergencyFileTarget($tkey);
2314        } elsif ($myDest eq 'APPEND') {
2315            $retVal = ">>" . EmergencyFileTarget($tkey);
2316        } else {
2317            $retVal = $myDest;
2318        }
2319        # Return the result.
2320        return $retVal;
2321    }
2322    
2323    =head3 Emergency
2324    
2325    C<< Emergency($key, $hours, $dest, $level, @modules); >>
2326    
2327    Turn on emergency tracing. This method can only be invoked over the web and is
2328    should not be called if debug mode is off. The caller specifies the duration of the
2329    emergency in hours, the desired tracing destination, the trace level,
2330    and a list of the trace modules to activate. For the length of the duration, when a
2331    program in an environment with the specified tracing key active invokes a Sprout
2332    CGI script, tracing will be turned on automatically. See L</TSetup> for more
2333    about tracing setup and L</ETracing> for more about emergency tracing.
2334    
2335    =over 4
2336    
2337    =item tkey
2338    
2339    The tracing key. This is used to identify the control file and the trace file.
2340    
2341    =item hours
2342    
2343    Number of hours to keep emergency tracing alive.
2344    
2345    =item dest
2346    
2347    Tracing destination. If no path information is specified for a file
2348    destination, it is put in the FIG temporary directory.
2349    
2350    =item level
2351    
2352    Tracing level. A higher level means more trace messages.
2353    
2354    =item modules
2355    
2356    A list of the tracing modules to activate.
2357    
2358    =back
2359    
2360    =cut
2361    
2362    sub Emergency {
2363        # Get the parameters.
2364        my ($tkey, $hours, $dest, $level, @modules) = @_;
2365        # Create the emergency file.
2366        my $specFile = EmergencyFileName($tkey);
2367        my $outHandle = Open(undef, ">$specFile");
2368        print $outHandle join("\n", $hours, $dest, $level, @modules, "");
2369    }
2370    
2371    =head3 EmergencyKey
2372    
2373    C<< my $tkey = EmergencyKey($parameter); >>
2374    
2375    Return the Key to be used for emergency tracing. This could be an IP address,
2376     a session ID, or a user name, depending on the environment.
2377    
2378    =over 4
2379    
2380    =item parameter
2381    
2382    Parameter defining the method for finding the tracing key. If it is a scalar,
2383    then it is presumed to be the tracing key itself. If it is a CGI object, then
2384    the tracing key is taken from the C<IP> cookie. Otherwise, the tracing key is
2385    taken from the C<TRACING> environment variable.
2386    
2387    =item RETURN
2388    
2389    Returns the key to be used for labels in emergency tracing.
2390    
2391    =back
2392    
2393    =cut
2394    
2395    sub EmergencyKey {
2396        # Get the parameters.
2397        my ($parameter) = @_;
2398        # Declare the return variable.
2399        my $retVal;
2400        # Determine the parameter type.
2401        if (! defined $parameter) {
2402            # Here we're supposed to check the environment.
2403            $retVal = $ENV{TRACING};
2404        } else {
2405            my $ptype = ref $parameter;
2406            if ($ptype eq 'CGI') {
2407                # Here we were invoked from a web page. Look for a cookie.
2408                $retVal = $parameter->cookie('IP');
2409            } elsif (! $ptype) {
2410                # Here the key was passed in.
2411                $retVal = $parameter;
2412            }
2413        }
2414        # If no luck finding a key, use the PID.
2415        if (! defined $retVal) {
2416            $retVal = $$;
2417        }
2418        # Return the result.
2419        return $retVal;
2420    }
2421    
2422    
2423    =head3 TraceParms
2424    
2425    C<< Tracer::TraceParms($cgi); >>
2426    
2427    Trace the CGI parameters at trace level CGI => 3 and the environment variables
2428    at level CGI => 4.
2429    
2430    =over 4
2431    
2432    =item cgi
2433    
2434    CGI query object containing the parameters to trace.
2435    
2436    =back
2437    
2438    =cut
2439    
2440    sub TraceParms {
2441        # Get the parameters.
2442        my ($cgi) = @_;
2443          if (T(CGI => 3)) {          if (T(CGI => 3)) {
2444              # Here we want to trace the parameter data.              # Here we want to trace the parameter data.
2445              my @names = $query->param;          my @names = $cgi->param;
2446              for my $parmName (sort @names) {              for my $parmName (sort @names) {
2447                  # Note we skip "Trace", which is for our use only.              # Note we skip the Trace parameters, which are for our use only.
2448                  if ($parmName ne 'Trace') {              if ($parmName ne 'Trace' && $parmName ne 'TF') {
2449                      my @values = $query->param($parmName);                  my @values = $cgi->param($parmName);
2450                      Trace("CGI: $parmName = " . join(", ", @values));                      Trace("CGI: $parmName = " . join(", ", @values));
2451                  }                  }
2452              }              }
2453            # Display the request method.
2454            my $method = $cgi->request_method();
2455            Trace("Method: $method");
2456          }          }
2457          if (T(CGI => 4)) {          if (T(CGI => 4)) {
2458              # Here we want the environment data too.              # Here we want the environment data too.
# Line 1855  Line 2460 
2460                  Trace("ENV: $envName = $ENV{$envName}");                  Trace("ENV: $envName = $ENV{$envName}");
2461              }              }
2462          }          }
     } else {  
         # Here tracing is to be turned off. All we allow is errors traced into the  
         # error log.  
         TSetup("0", "WARN");  
     }  
     # Create the variable hash.  
     my $varHash = { DebugData => '' };  
     # If we're in DEBUG mode, set up the debug mode data for forms.  
     if (Tracer::DebugMode) {  
         $varHash->{DebugData} = GetFile("Html/DebugFragment.html");  
     }  
     # Return the query object and variable hash.  
     return ($query, $varHash);  
2463  }  }
2464    
2465  =head3 ScriptFinish  =head3 ScriptFinish
# Line 1894  Line 2486 
2486      use FIG;      use FIG;
2487      # ... more uses ...      # ... more uses ...
2488    
2489      my ($query, $varHash) = ScriptSetup();      my ($cgi, $varHash) = ScriptSetup();
2490      eval {      eval {
2491          # ... get data from $query, put it in $varHash ...          # ... get data from $cgi, put it in $varHash ...
2492      };      };
2493      if ($@) {      if ($@) {
2494          Trace("Script Error: $@") if T(0);          Trace("Script Error: $@") if T(0);
# Line 1931  Line 2523 
2523      # Check for a template file situation.      # Check for a template file situation.
2524      my $outputString;      my $outputString;
2525      if (defined $varHash) {      if (defined $varHash) {
2526          # Here we have a template file. We need to apply the variables to the template.          # Here we have a template file. We need to determine the template type.
2527          $outputString = PageBuilder::Build("<$webData", $varHash, "Html");          my $template;
2528            if ($FIG_Config::template_url && $webData =~ /\.php$/) {
2529                $template = "$FIG_Config::template_url/$webData";
2530            } else {
2531                $template = "<<$webData";
2532            }
2533            $outputString = PageBuilder::Build($template, $varHash, "Html");
2534      } else {      } else {
2535          # Here the user gave us a raw string.          # Here the user gave us a raw string.
2536          $outputString = $webData;          $outputString = $webData;
2537      }      }
2538      # Check for trace messages.      # Check for trace messages.
2539      if ($Destination eq "QUEUE") {      if ($Destination ne "NONE" && $TraceLevel > 0) {
2540          # We have trace messages, so we want to put them at the end of the body. This          # We have trace messages, so we want to put them at the end of the body. This
2541          # is either at the end of the whole string or at the beginning of the BODY          # is either at the end of the whole string or at the beginning of the BODY
2542          # end-tag.          # end-tag.
# Line 1946  Line 2544 
2544          if ($outputString =~ m#</body>#gi) {          if ($outputString =~ m#</body>#gi) {
2545              $pos = (pos $outputString) - 7;              $pos = (pos $outputString) - 7;
2546          }          }
2547          substr $outputString, $pos, 0, QTrace('Html');          # If the trace messages were queued, we unroll them. Otherwise, we display the
2548            # destination.
2549            my $traceHtml;
2550            if ($Destination eq "QUEUE") {
2551                $traceHtml = QTrace('Html');
2552            } elsif ($Destination =~ /^>>(.+)$/) {
2553                # Here the tracing output it to a file. We code it as a hyperlink so the user
2554                # can copy the file name into the clipboard easily.
2555                my $actualDest = $1;
2556                $traceHtml = "<p>Tracing output to $actualDest.</p>\n";
2557            } else {
2558                # Here we have one of the special destinations.
2559                $traceHtml = "<P>Tracing output type is $Destination.</p>\n";
2560            }
2561            substr $outputString, $pos, 0, $traceHtml;
2562      }      }
2563      # Write the output string.      # Write the output string.
2564      print $outputString;      print $outputString;
# Line 2008  Line 2620 
2620      }      }
2621  }  }
2622    
2623    =head3 SendSMS
2624    
2625    C<< my $msgID = Tracer::SendSMS($phoneNumber, $msg); >>
2626    
2627    Send a text message to a phone number using Clickatell. The FIG_Config file must contain the
2628    user name, password, and API ID for the relevant account in the hash reference variable
2629    I<$FIG_Config::phone>, using the keys C<user>, C<password>, and C<api_id>. For
2630    example, if the user name is C<BruceTheHumanPet>, the password is C<silly>, and the API ID
2631    is C<2561022>, then the FIG_Config file must contain
2632    
2633        $phone =  { user => 'BruceTheHumanPet',
2634                    password => 'silly',
2635                    api_id => '2561022' };
2636    
2637    The original purpose of this method was to insure Bruce would be notified immediately when the
2638    Sprout Load terminates. Care should be taken if you do not wish Bruce to be notified immediately
2639    when you call this method.
2640    
2641    The message ID will be returned if successful, and C<undef> if an error occurs.
2642    
2643    =over 4
2644    
2645    =item phoneNumber
2646    
2647    Phone number to receive the message, in international format. A United States phone number
2648    would be prefixed by "1". A British phone number would be prefixed by "44".
2649    
2650    =item msg
2651    
2652    Message to send to the specified phone.
2653    
2654    =item RETURN
2655    
2656    Returns the message ID if successful, and C<undef> if the message could not be sent.
2657    
2658    =back
2659    
2660    =cut
2661    
2662    sub SendSMS {
2663        # Get the parameters.
2664        my ($phoneNumber, $msg) = @_;
2665        # Declare the return variable. If we do not change it, C<undef> will be returned.
2666        my $retVal;
2667        # Only proceed if we have phone support.
2668        if (! defined $FIG_Config::phone) {
2669            Trace("Phone support not present in FIG_Config.") if T(1);
2670        } else {
2671            # Get the phone data.
2672            my $parms = $FIG_Config::phone;
2673            # Get the Clickatell URL.
2674            my $url = "http://api.clickatell.com/http/";
2675            # Create the user agent.
2676            my $ua = LWP::UserAgent->new;
2677            # Request a Clickatell session.
2678            my $resp = $ua->post("$url/sendmsg", { user => $parms->{user},
2679                                         password => $parms->{password},
2680                                         api_id => $parms->{api_id},
2681                                         to => $phoneNumber,
2682                                         text => $msg});
2683            # Check for an error.
2684            if (! $resp->is_success) {
2685                Trace("Alert failed.") if T(1);
2686            } else {
2687                # Get the message ID.
2688                my $rstring = $resp->content;
2689                if ($rstring =~ /^ID:\s+(.*)$/) {
2690                    $retVal = $1;
2691                } else {
2692                    Trace("Phone attempt failed with $rstring") if T(1);
2693                }
2694            }
2695        }
2696        # Return the result.
2697        return $retVal;
2698    }
2699    
2700    =head3 CommaFormat
2701    
2702    C<< my $formatted = Tracer::CommaFormat($number); >>
2703    
2704    Insert commas into a number.
2705    
2706    =over 4
2707    
2708    =item number
2709    
2710    A sequence of digits.
2711    
2712    =item RETURN
2713    
2714    Returns the same digits with commas strategically inserted.
2715    
2716    =back
2717    
2718    =cut
2719    
2720    sub CommaFormat {
2721        # Get the parameters.
2722        my ($number) = @_;
2723        # Pad the length up to a multiple of three.
2724        my $padded = "$number";
2725        $padded = " " . $padded while length($padded) % 3 != 0;
2726        # This is a fancy PERL trick. The parentheses in the SPLIT pattern
2727        # cause the delimiters to be included in the output stream. The
2728        # GREP removes the empty strings in between the delimiters.
2729        my $retVal = join(",", grep { $_ ne '' } split(/(...)/, $padded));
2730        # Clean out the spaces.
2731        $retVal =~ s/ //g;
2732        # Return the result.
2733        return $retVal;
2734    }
2735    =head3 SetPermissions
2736    
2737    C<< Tracer::SetPermissions($dirName, $group, $mask, %otherMasks); >>
2738    
2739    Set the permissions for a directory and all the files and folders inside it.
2740    In addition, the group ownership will be changed to the specified value.
2741    
2742    This method is more vulnerable than most to permission and compatability
2743    problems, so it does internal error recovery.
2744    
2745    =over 4
2746    
2747    =item dirName
2748    
2749    Name of the directory to process.
2750    
2751    =item group
2752    
2753    Name of the group to be assigned.
2754    
2755    =item mask
2756    
2757    Permission mask. Bits that are C<1> in this mask will be ORed into the
2758    permission bits of any file or directory that does not already have them
2759    set to 1.
2760    
2761    =item otherMasks
2762    
2763    Map of search patterns to permission masks. If a directory name matches
2764    one of the patterns, that directory and all its members and subdirectories
2765    will be assigned the new pattern. For example, the following would
2766    assign 01664 to most files, but would use 01777 for directories named C<tmp>.
2767    
2768        Tracer::SetPermissions($dirName, 'fig', 01664, '^tmp$' => 01777);
2769    
2770    The list is ordered, so the following would use 0777 for C<tmp1> and
2771    0666 for C<tmp>, C<tmp2>, or C<tmp3>.
2772    
2773        Tracer::SetPermissions($dirName, 'fig', 01664, '^tmp1' => 0777,
2774                                                       '^tmp' => 0666);
2775    
2776    Note that the pattern matches are all case-insensitive, and only directory
2777    names are matched, not file names.
2778    
2779    =back
2780    
2781    =cut
2782    
2783    sub SetPermissions {
2784        # Get the parameters.
2785        my ($dirName, $group, $mask, @otherMasks) = @_;
2786        # Set up for error recovery.
2787        eval {
2788            # Switch to the specified directory.
2789            ChDir($dirName);
2790            # Get the group ID.
2791            my $gid = getgrnam($group);
2792            # Get the mask for tracing.
2793            my $traceMask = sprintf("%04o", $mask) . "($mask)";
2794            Trace("Fixing permissions for directory $dirName using group $group($gid) and mask $traceMask.") if T(2);
2795            my $fixCount = 0;
2796            my $lookCount = 0;
2797            # @dirs will be a stack of directories to be processed.
2798            my @dirs = (getcwd());
2799            while (scalar(@dirs) > 0) {
2800                # Get the current directory.
2801                my $dir = pop @dirs;
2802                # Check for a match to one of the specified directory names. To do
2803                # that, we need to pull the individual part of the name off of the
2804                # whole path.
2805                my $simpleName = $dir;
2806                if ($dir =~ m!/([^/]+)$!) {
2807                    $simpleName = $1;
2808                }
2809                Trace("Simple directory name for $dir is $simpleName.") if T(4);
2810                # Search for a match.
2811                my $match = 0;
2812                my $i;
2813                for ($i = 0; $i < $#otherMasks && ! $match; $i += 2) {
2814                    my $pattern = $otherMasks[$i];
2815                    if ($simpleName =~ /$pattern/i) {
2816                        $match = 1;
2817                    }
2818                }
2819                # Check for a match. Note we use $i-1 because the loop added 2
2820                # before terminating due to the match.
2821                if ($match && $otherMasks[$i-1] != $mask) {
2822                    # This directory matches one of the incoming patterns, and it's
2823                    # a different mask, so we process it recursively with that mask.
2824                    SetPermissions($dir, $group, $otherMasks[$i-1], @otherMasks);
2825                } else {
2826                    # Here we can process normally. Get all of the non-hidden members.
2827                    my @submems = OpenDir($dir, 1);
2828                    for my $submem (@submems) {
2829                        # Get the full name.
2830                        my $thisMem = "$dir/$submem";
2831                        Trace("Checking member $thisMem.") if T(4);
2832                        $lookCount++;
2833                        if ($lookCount % 1000 == 0) {
2834                            Trace("$lookCount members examined. Current is $thisMem. Mask is $traceMask") if T(3);
2835                        }
2836                        # Fix the group.
2837                        chown -1, $gid, $thisMem;
2838                        # Insure this member is not a symlink.
2839                        if (! -l $thisMem) {
2840                            # Get its info.
2841                            my $fileInfo = stat $thisMem;
2842                            # Only proceed if we got the info. Otherwise, it's a hard link
2843                            # and we want to skip it anyway.
2844                            if ($fileInfo) {
2845                                my $fileMode = $fileInfo->mode;
2846                                if (($fileMode & $mask) != $mask) {
2847                                    # Fix this member.
2848                                    $fileMode |= $mask;
2849                                    chmod $fileMode, $thisMem;
2850                                    $fixCount++;
2851                                }
2852                                # If it's a subdirectory, stack it.
2853                                if (-d $thisMem) {
2854                                    push @dirs, $thisMem;
2855                                }
2856                            }
2857                        }
2858                    }
2859                }
2860            }
2861            Trace("$lookCount files and directories processed, $fixCount fixed.") if T(2);
2862        };
2863        # Check for an error.
2864        if ($@) {
2865            Confess("SetPermissions error: $@");
2866        }
2867    }
2868    
2869    =head3 CompareLists
2870    
2871    C<< my ($inserted, $deleted) = Tracer::CompareLists(\@newList, \@oldList, $keyIndex); >>
2872    
2873    Compare two lists of tuples, and return a hash analyzing the differences. The lists
2874    are presumed to be sorted alphabetically by the value in the $keyIndex column.
2875    The return value contains a list of items that are only in the new list
2876    (inserted) and only in the old list (deleted).
2877    
2878    =over 4
2879    
2880    =item newList
2881    
2882    Reference to a list of new tuples.
2883    
2884    =item oldList
2885    
2886    Reference to a list of old tuples.
2887    
2888    =item keyIndex (optional)
2889    
2890    Index into each tuple of its key field. The default is 0.
2891    
2892    =item RETURN
2893    
2894    Returns a 2-tuple consisting of a reference to the list of items that are only in the new
2895    list (inserted) followed by a reference to the list of items that are only in the old
2896    list (deleted).
2897    
2898    =back
2899    
2900    =cut
2901    
2902    sub CompareLists {
2903        # Get the parameters.
2904        my ($newList, $oldList, $keyIndex) = @_;
2905        if (! defined $keyIndex) {
2906            $keyIndex = 0;
2907        }
2908        # Declare the return variables.
2909        my ($inserted, $deleted) = ([], []);
2910        # Loop through the two lists simultaneously.
2911        my ($newI, $oldI) = (0, 0);
2912        my ($newN, $oldN) = (scalar @{$newList}, scalar @{$oldList});
2913        while ($newI < $newN || $oldI < $oldN) {
2914            # Get the current object in each list. Note that if one
2915            # of the lists is past the end, we'll get undef.
2916            my $newItem = $newList->[$newI];
2917            my $oldItem = $oldList->[$oldI];
2918            if (! defined($newItem) || defined($oldItem) && $newItem->[$keyIndex] gt $oldItem->[$keyIndex]) {
2919                # The old item is not in the new list, so mark it deleted.
2920                push @{$deleted}, $oldItem;
2921                $oldI++;
2922            } elsif (! defined($oldItem) || $oldItem->[$keyIndex] gt $newItem->[$keyIndex]) {
2923                # The new item is not in the old list, so mark it inserted.
2924                push @{$inserted}, $newItem;
2925                $newI++;
2926            } else {
2927                # The item is in both lists, so push forward.
2928                $oldI++;
2929                $newI++;
2930            }
2931        }
2932        # Return the result.
2933        return ($inserted, $deleted);
2934    }
2935    
2936    =head3 GetLine
2937    
2938    C<< my @data = Tracer::GetLine($handle); >>
2939    
2940    Read a line of data from a tab-delimited file.
2941    
2942    =over 4
2943    
2944    =item handle
2945    
2946    Open file handle from which to read.
2947    
2948    =item RETURN
2949    
2950    Returns a list of the fields in the record read. The fields are presumed to be
2951    tab-delimited. If we are at the end of the file, then an empty list will be
2952    returned. If an empty line is read, a single list item consisting of a null
2953    string will be returned.
2954    
2955    =back
2956    
2957    =cut
2958    
2959    sub GetLine {
2960        # Get the parameters.
2961        my ($handle) = @_;
2962        # Declare the return variable.
2963        my @retVal = ();
2964        # Read from the file.
2965        my $line = <$handle>;
2966        # Only proceed if we found something.
2967        if (defined $line) {
2968            # Remove the new-line.
2969            chomp $line;
2970            # If the line is empty, return a single empty string; otherwise, parse
2971            # it into fields.
2972            if ($line eq "") {
2973                push @retVal, "";
2974            } else {
2975                push @retVal, split /\t/,$line;
2976            }
2977        }
2978        # Return the result.
2979        return @retVal;
2980    }
2981    
2982    =head3 PutLine
2983    
2984    C<< Tracer::PutLine($handle, \@fields); >>
2985    
2986    Write a line of data to a tab-delimited file. The specified field values will be
2987    output in tab-separated form, with a trailing new-line.
2988    
2989    =over 4
2990    
2991    =item handle
2992    
2993    Output file handle.
2994    
2995    =item fields
2996    
2997    List of field values.
2998    
2999    =back
3000    
3001    =cut
3002    
3003    sub PutLine {
3004        # Get the parameters.
3005        my ($handle, $fields) = @_;
3006        # Write the data.
3007        print $handle join("\t", @{$fields}) . "\n";
3008    }
3009    
3010    =head3 GenerateURL
3011    
3012    C<< my $queryUrl = Tracer::GenerateURL($page, %parameters); >>
3013    
3014    Generate a GET-style URL for the specified page with the specified parameter
3015    names and values. The values will be URL-escaped automatically. So, for
3016    example
3017    
3018        Tracer::GenerateURL("form.cgi", type => 1, string => "\"high pass\" or highway")
3019    
3020    would return
3021    
3022        form.cgi?type=1&string=%22high%20pass%22%20or%20highway
3023    
3024    =over 4
3025    
3026    =item page
3027    
3028    Page URL.
3029    
3030    =item parameters
3031    
3032    Hash mapping parameter names to parameter values.
3033    
3034    =item RETURN
3035    
3036    Returns a GET-style URL that goes to the specified page and passes in the
3037    specified parameters and values.
3038    
3039    =back
3040    
3041    =cut
3042    
3043    sub GenerateURL {
3044        # Get the parameters.
3045        my ($page, %parameters) = @_;
3046        # Prime the return variable with the page URL.
3047        my $retVal = $page;
3048        # Loop through the parameters, creating parameter elements in a list.
3049        my @parmList = map { "$_=" . uri_escape($parameters{$_}) } keys %parameters;
3050        # If the list is nonempty, tack it on.
3051        if (@parmList) {
3052            $retVal .= "?" . join("&", @parmList);
3053        }
3054        # Return the result.
3055        return $retVal;
3056    }
3057    
3058  1;  1;

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