From 17557f7799a9b15adab76086f1f22481f1d10bd1 Mon Sep 17 00:00:00 2001
From: Francois Fleuret <francois@fleuret.org>
Date: Mon, 28 Jan 2013 16:30:57 +0100
Subject: [PATCH] Added the full usage + now initializes full_line.

---
 mymail.c | 37 ++++++++++++++++++++++++++-----------
 1 file changed, 26 insertions(+), 11 deletions(-)

diff --git a/mymail.c b/mymail.c
index 001d14d..2617d02 100644
--- a/mymail.c
+++ b/mymail.c
@@ -88,12 +88,26 @@ void *safe_malloc(size_t n) {
 
 /*********************************************************************/
 
-void usage(FILE *out) {
+void print_version(FILE *out) {
   fprintf(out, "mymail version %s (%s)\n", VERSION, UNAME);
+}
+
+void print_usage(FILE *out) {
+  print_version(out);
   fprintf(out, "Written by Francois Fleuret <francois@fleuret.org>.\n");
   fprintf(out, "\n");
   fprintf(out, "Usage: mymail [options] [<filename1> [<filename2> ...]]\n");
   fprintf(out, "\n");
+  fprintf(out, " -h, --help\n");
+  fprintf(out, "         show this help\n");
+  fprintf(out, " -v, --version\n");
+  fprintf(out, "         print the version number\n");
+  fprintf(out, " -i, --index\n");
+  fprintf(out, "         index mails\n");
+  fprintf(out, " -d <db filename>, --db-file <db filename>\n");
+  fprintf(out, "         set the data-base file\n");
+  fprintf(out, " -s <search pattern>, --search <search pattern>\n");
+  fprintf(out, "         search for matching mails in the data-base file\n");
 }
 
 /*********************************************************************/
@@ -195,6 +209,7 @@ void index_mbox(const char *input_filename,
 
   position_in_file = 0;
   end_of_full_line = 0;
+  full_line[0] = '\0';
 
   while(fgets(raw_line, BUFFER_SIZE, file)) {
     if(strncmp(raw_line, "From ", 5) == 0) {
@@ -308,7 +323,8 @@ enum {
 
 static struct option long_options[] = {
   { "help", no_argument, 0, 'h' },
-  { "db-file", 1, 0, 'p' },
+  { "version", no_argument, 0, 'v' },
+  { "db-file", 1, 0, 'd' },
   { "search-pattern", 1, 0, 's' },
   { "index", 0, 0, 'i' },
   { 0, 0, 0, 0 }
@@ -340,7 +356,7 @@ int main(int argc, char **argv) {
 
   setlocale(LC_ALL, "");
 
-  while ((c = getopt_long(argc, argv, "hip:s:",
+  while ((c = getopt_long(argc, argv, "hvip:s:",
                           long_options, NULL)) != -1) {
 
     switch(c) {
@@ -349,13 +365,17 @@ int main(int argc, char **argv) {
       show_help = 1;
       break;
 
+    case 'v':
+      print_version(stdout);
+      break;
+
     case 'i':
       action_index = 1;
       break;
 
     case 'p':
       db_filename = strdup(optarg);
-      printf("db_filename=\"%s\"\n", db_filename);
+      /* printf("db_filename=\"%s\"\n", db_filename); */
       break;
 
     case 's':
@@ -379,12 +399,12 @@ int main(int argc, char **argv) {
   }
 
   if(error) {
-    usage(stderr);
+    print_usage(stderr);
     exit(EXIT_FAILURE);
   }
 
   if(show_help) {
-    usage(stdout);
+    print_usage(stdout);
     exit(EXIT_SUCCESS);
   }
 
@@ -436,11 +456,6 @@ int main(int argc, char **argv) {
         exit(EXIT_FAILURE);
       }
 
-      /* printf("Starting search in %s for field \"%s\" matching \"%s\".\n", */
-      /* db_filename, */
-      /* search_name, */
-      /* search_regexp_string); */
-
       db_file = fopen(db_filename, "r");
 
       if(!db_file) {
-- 
2.20.1