Implement a debug mode ("--debug").

doc/mboxgrep.1

@@ -1,5 +1,4 @@
-.Id $Id: mboxgrep.1,v 1.16 2006-01-18 00:09:58 dspiljar Exp $
-.TH MBOXGREP 1 "26 Jan 2023"
+.TH MBOXGREP 1 "17 Feb 2023"
 .SH NAME
 mboxgrep \- displays email messages matching a pattern
 .SH SYNOPSIS
@@ -86,6 +85,10 @@ Ignore duplicate messages.
 Select input and output mailbox TYPE.  TYPE can be either `mbox' (default), 
 `zmbox' (gzip compressed mbox), `bz2mbox' (bzip2 compressed mbox), `mh', `nnml', 
 `nnmh' or `maildir'.
+.IP "-s, --no-messages"
+Suppress most error messages.
+.IP "--debug"
+Print messages useful for debugging.
 .SH EXAMPLES
 .TP
 \(bu

doc/mboxgrep.texi

@@ -6,7 +6,7 @@
 
 @set EDITION 0.7
 @set VERSION 0.7.10
-@set UPDATED 26 Jan 2023
+@set UPDATED 17 Feb 2023
 
 @dircategory Mail
 @direntry
@@ -188,6 +188,9 @@ instance of COMMAND.
 @itemx -s
 Suppress error messages.
 
+@item --debug
+Print messages useful for debugging.
+
 @end table
 
 @node Search scope selection, Mailbox type selection, Output control, Invoking

src/info.c

@@ -120,7 +120,8 @@ help (void)
           "  -nd, --no-duplicates\t\tIgnore duplicate messages\n"
 	  "  -o,  --output=MAILBOX\t\tWrite messages to MAILBOX\n"
 	  "  -p,  --pipe=COMMAND\t\tPipe each found message to COMMAND\n"
-	  "  -s,  --no-messages\t\tSuppress most error messages\n\n"
+	  "  -s,  --no-messages\t\tSuppress most error messages\n"
+    "       --debug\t\t\tPrint messages useful for debugging\n\n"
 	  "Matching criteria:\n\n"
 	  "  -E,  --extended-regexp\tPATTERN is an extended regular expression\n"
 	  "  -G,  --basic-regexp\t\tPATTERN is a basic regular expression\n");

src/main.c

@@ -48,8 +48,6 @@ runtime_t runtime;
 
 int
 main (int argc, char **argv)
-     /* {{{  */
-
 {
   int havemailbox = 0;
   int singlefile = 0;
@@ -57,8 +55,6 @@ main (int argc, char **argv)
   runtime.maildir_count = 0;
 
   static struct option long_options[] = 
-    /* {{{  */
-
     {
       {"count", 0, 0, 'c'},
       {"delete", 0, 0, 'd'},
@@ -80,13 +76,12 @@ main (int argc, char **argv)
       {"output", 1, 0, 'o'},
       {"no-duplicates", 0, 0, 200},
       {"no-file-lock", 0, 0, 201},
+      {"debug", 0, 0, 202},
       {"file-lock", 1, 0, 'l'},
       {"recursive", 0, 0, 'r'},
       {0, 0, 0, 0}
     };
 
-  /* }}} */
-
   set_default_options ();
 
   get_runtime_options (&argc, argv, long_options);
@@ -112,17 +107,17 @@ main (int argc, char **argv)
       config.regex_s = xstrdup (argv[optind]);
       config.haveregex = 1;
       ++optind;
-    } /* if */
+    }
 
   if (config.haveregex) 
     {
 #ifdef HAVE_LIBPCRE
       if (config.perl)
-	pcre_init ();
+        pcre_init ();
       else
 #endif /* HAVE_LIBPCRE */
-	regex_init ();
-    } /* if */
+        regex_init ();
+    }
   else
     usage ();
 
@@ -130,56 +125,49 @@ main (int argc, char **argv)
     singlefile = 1;
 
   while (optind < argc)
-    /* {{{  */
-
     {
-      if (config.action == DELETE) {
-	tmpmbox_create (argv[optind]);
-	runtime.tmp_mbox = (mbox_t *) mbox_open (config.tmpfilename, "w");
-      }
+      if (config.action == DELETE)
+        {
+          tmpmbox_create (argv[optind]);
+          runtime.tmp_mbox = (mbox_t *) mbox_open (config.tmpfilename, "w");
+        }
 
       config.boxname = xstrdup (argv[optind]);
 
       if (config.recursive)
-	recursive_scan (argv[optind]);
+        recursive_scan (argv[optind]);
       else
-	scan_mailbox (argv[optind]);
-      havemailbox = 1;
-      if (config.action == COUNT)
-	{
-	  if (singlefile)
-	    fprintf (stdout, "%i\n", runtime.count);
-	  else
-	    {
-	      if (0 == strcmp ("-", argv[optind]))
-		fprintf (stdout, "(standard input):%i\n", runtime.count);
-	      else
-		fprintf (stdout, "%s:%i\n", argv[optind], runtime.count);
-	    }
-	}
-      if (config.action == DELETE)
-	{
-	  mbox_close (runtime.tmp_mbox);
-	  rename (config.tmpfilename, argv[optind]);
-	}
-      ++optind;
-    } /* while */
+        scan_mailbox (argv[optind]);
 
-  /* }}} */
+      havemailbox = 1;
+
+      if (config.action == COUNT)
+        {
+          if (singlefile)
+            fprintf (stdout, "%i\n", runtime.count);
+          else
+            {
+              if (0 == strcmp ("-", argv[optind]))
+                fprintf (stdout, "(standard input):%i\n", runtime.count);
+              else
+                fprintf (stdout, "%s:%i\n", argv[optind], runtime.count);
+            }
+        }
+      if (config.action == DELETE)
+        {
+          mbox_close (runtime.tmp_mbox);
+          rename (config.tmpfilename, argv[optind]);
+        }
+      ++optind;
+    }
 
   if (! havemailbox)
-    /* {{{  */
-
     {
       config.format = MBOX;
       scan_mailbox ("-");
       if (config.action == COUNT)
-	fprintf (stdout, "%i\n", runtime.count);
+        fprintf (stdout, "%i\n", runtime.count);
     }
 
-  /* }}} */
-
   return 0;
-} /* main */
-
-/* }}} */
+}

src/mboxgrep.h

@@ -107,6 +107,7 @@ typedef struct
   int merr;
   int pid;
   int haveregex;
+  int debug;
 
   char hostname[HOST_NAME_SIZE];
   char *boxname, *outboxname, *pipecmd, *tmpfilename, *regex_s;

src/misc.c

@@ -1,6 +1,6 @@
-/* -*- C -*- 
+/*
   mboxgrep - scan mailbox for messages matching a regular expression
-  Copyright (C) 2000, 2001, 2002, 2003, 2006  Daniel Spiljar
+  Copyright (C) 2000 - 2004, 2006, 2023  Daniel Spiljar
 
   Mboxgrep is free software; you can redistribute it and/or modify it 
   under the terms of the GNU General Public License as published by
@@ -15,8 +15,7 @@
   You should have received a copy of the GNU General Public License
   along with mboxgrep; if not, write to the Free Software Foundation, 
   Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-
-  $Id: misc.c,v 1.17 2006-07-06 10:53:49 dspiljar Exp $ */
+*/
 
 #define _XOPEN_SOURCE  /* Pull in strptime(3) from time.h */
 #define _BSD_SOURCE    /* Compensate for _XOPEN_SOURCE to pull in strdup(3)
@@ -38,7 +37,6 @@
 
 format_t
 folder_format (const char *name)
-     /* {{{  */
 {
   format_t f;
 
@@ -63,16 +61,14 @@ folder_format (const char *name)
   else
     {
       if (config.merr)
-	fprintf (stderr, "mboxgrep: %s: unknown folder type\n", name);
+        fprintf (stderr, "%s: %s: unknown folder type\n", APPNAME, name);
       exit (2);
     }
 
   return f;
 }
-/* }}} */
 
 lockmethod_t lock_method (const char *name)
-     /* {{{  */
 {
   lockmethod_t l;
 
@@ -97,38 +93,36 @@ lockmethod_t lock_method (const char *name)
 
   return l;
 }
-/* }}} */
 
-/* time_t parse_date(char *datestr) */
-     /* {{{  */
-/* { */
-/*   time_t t; */
-/*   const char *fmt = "%d%n%b%n%Y%n%T"; */
-/*   int h, m; */
-/*   struct tm tm; */
-/*   char *str2, str1[BUFSIZ]; */
+/*
+time_t parse_date(char *datestr)
+{
+  time_t t;
+  const char *fmt = "%d%n%b%n%Y%n%T";
+  int h, m;
+  struct tm tm;
+  char *str2, str1[BUFSIZ];
 
-/*   sscanf (datestr, "Date: %[^\r\n]", str1); */
+  sscanf (datestr, "Date: %[^\r\n]", str1);
 
-/*   str2 = (char *) strptime (str1, "%d%n%b%n%Y%n%T", &tm); */
-/*   if (str2 == NULL) */
-/*     str2 = (char *) strptime (str1, "%a, %d%n%b%n%Y%n%T", &tm); */
-/*   if (str2 == NULL) */
-/*     return (time_t) 0; */
- 
-/*   if (sscanf (str2, "%3d%2d", &h, &m) == 2) */
-/*     { */
-/*       tm.tm_hour -= h; */
-/*       tm.tm_min -= (h >= 0 ? m : -m); */
-/*       t = (time_t) mktime (&tm); */
-/*     } */
+  str2 = (char *) strptime (str1, "%d%n%b%n%Y%n%T", &tm);
+  if (str2 == NULL)
+    str2 = (char *) strptime (str1, "%a, %d%n%b%n%Y%n%T", &tm);
+  if (str2 == NULL)
+    return (time_t) 0;
 
-/*   return t; */
-/* } */
-/* }}} */
+  if (sscanf (str2, "%3d%2d", &h, &m) == 2)
+    {
+      tm.tm_hour -= h;
+      tm.tm_min -= (h >= 0 ? m : -m);
+      t = (time_t) mktime (&tm);
+    }
+
+   return t;
+}
+*/
 
 char * parse_return_path(char *rpath)
-     /* {{{  */
 {
   char *blah1, blah2[BUFSIZ];
 
@@ -137,7 +131,6 @@ char * parse_return_path(char *rpath)
 
   return blah1;
 }
-/* }}} */
 
 void * allocate_message (void)
 {
@@ -188,6 +181,7 @@ set_default_options (void)
   config.format = MBOX; /* default mailbox format */
   config.lock = FCNTL; /* default file locking method */
   config.merr = 1; /* report errors by default */
+  config.debug = 0;
 }
 
 void
@@ -201,103 +195,104 @@ get_runtime_options (int *argc, char **argv, struct option *long_options)
 		       &option_index);
 
       if (c == -1)
-	break;
+        break;
 
       switch (c)
-	/* {{{  */
-
-	{
-	case '?':
-	  usage();
-	case 'c':
-	  config.action = COUNT;
-	  break;
-	case 'd':
-	  config.action = DELETE;
-	  break;
-	case 'e':
-	  config.regex_s = xstrdup (optarg);
-	  config.haveregex = 1;
-	  break;
-	case 'o':
-	  config.outboxname = xstrdup (optarg);
-	  config.action = WRITE;
-	  break;
-	case 'E':
-	  config.extended = 1;
-	  break;
-	case 'G':
-	  config.extended = 0;
-	  break;
-	case 'P':
+        {
+          case '?':
+            usage();
+          case 'c':
+            config.action = COUNT;
+            break;
+          case 'd':
+            config.action = DELETE;
+            break;
+          case 'e':
+            config.regex_s = xstrdup (optarg);
+            config.haveregex = 1;
+            break;
+          case 'o':
+            config.outboxname = xstrdup (optarg);
+            config.action = WRITE;
+            break;
+          case 'E':
+            config.extended = 1;
+            break;
+          case 'G':
+            config.extended = 0;
+            break;
+          case 'P':
 #ifdef HAVE_LIBPCRE
-	  config.extended = 0;
-	  config.perl = 1;
+            config.extended = 0;
+            config.perl = 1;
 #else
-	  fprintf(stderr, 
-		  "%s: Support for Perl regular expressions not "
-		  "compiled in\n");
-	  exit(2);
+            fprintf(stderr,
+              "%s: Support for Perl regular expressions not "
+              "compiled in\n", APPNAME);
+            exit(2);
 #endif /* HAVE_LIBPCRE */
-	  break;
-	case 'h':
-	  help ();
-	  break;
-	case 'i':
-	  config.ignorecase = 1;
-	  break;
-	case 'm':
-	  config.format = folder_format (optarg);
-	  break;
-	case 'l':
-	  config.lock = lock_method (optarg);
-	  break;
-	case 'p':
-	  config.action = PIPE;
-	  config.pipecmd = xstrdup (optarg);
-	  break;
-	case 'V':
-	  version ();
-	  break;
-	case 'v':
-	  config.invert = 1;
-	  break;
-	case 'H':
-	  config.headers = 1;
-	  break;
-	case 'B':
-	  config.body = 1;
-	  break;
-	case 's':
-	  config.merr = 0;
-	  break;
-	case 201:
-	  config.lock = 0;
-	  break;
-	case 'r':
-	  config.recursive = 1;
-	  break;
-        case 200:
-          config.dedup = 1;
-          break;
-        case 'n':
-	  {
-	    switch (optarg[0])
-	      {
-	        case 'd':
-		  config.dedup = 1;
-		  break;
-		case 'l':
-		  config.lock = 0;
-		  break;
-	        default:
-		  fprintf(stderr, "%s: invalid option -- n%c\n", 
-			  APPNAME, optarg[0]);
-		  exit(2);
-	      }
-	  }
-	} /* switch */
-
-      /* }}} */
+            break;
+          case 'h':
+            help ();
+            break;
+          case 'i':
+            config.ignorecase = 1;
+            break;
+          case 'm':
+            config.format = folder_format (optarg);
+            break;
+          case 'l':
+            config.lock = lock_method (optarg);
+            break;
+          case 'p':
+            config.action = PIPE;
+            config.pipecmd = xstrdup (optarg);
+            break;
+          case 'V':
+            version ();
+            break;
+          case 'v':
+            config.invert = 1;
+            break;
+          case 'H':
+            config.headers = 1;
+            break;
+          case 'B':
+            config.body = 1;
+            break;
+          case 's':
+            config.merr = 0;
+            break;
+          case 201:
+            config.lock = 0;
+            break;
+          case 202:
+            config.debug = 1;
+            fprintf (stderr, "%s: %s, line %d: enable debugging\n",
+              APPNAME, __FILE__, __LINE__);
+            break;
+          case 'r':
+            config.recursive = 1;
+            break;
+          case 200:
+            config.dedup = 1;
+            break;
+          case 'n':
+            {
+              switch (optarg[0])
+                {
+                  case 'd':
+                    config.dedup = 1;
+                    break;
+                  case 'l':
+                    config.lock = 0;
+                    break;
+                  default:
+                    fprintf(stderr, "%s: invalid option -- n%c\n",
+                      APPNAME, optarg[0]);
+                    exit(2);
+                }
+            }
+        } /* switch */
     } /* while */
 }