From 09f39518f23f0bd59ace2f72c3f3717c5e64f9a6 Mon Sep 17 00:00:00 2001
From: Thorsten Töpper <atsutane@freethoughts.de>
Date: Sat, 14 Jun 2025 15:33:09 +0200
Subject: dir_monitor.c: print Total size

---
 dir_monitor.c | 47 +++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 41 insertions(+), 6 deletions(-)

diff --git a/dir_monitor.c b/dir_monitor.c
index 2d86fb0..8ff6781 100644
--- a/dir_monitor.c
+++ b/dir_monitor.c
@@ -11,6 +11,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <ctype.h>
 #include <getopt.h>
 #include <stdint.h>
 #include <errno.h>
@@ -18,6 +19,7 @@
 #include <dirent.h>
 #include <sys/stat.h>
 #include <time.h>
+#include <sys/ioctl.h>
 
 
 #define LOGERR(...) {fprintf(stderr, "[%s:%d] %s: ", __FILE__, __LINE__, __func__); fprintf(stderr, __VA_ARGS__);}
@@ -46,6 +48,8 @@ struct list_head {
 
 struct list_node *create_node(char *fname, size_t fsize, time_t ftime);
 void destroy_list(struct list_head *list);
+int fputc_all_cols(char c, FILE *fdout);
+int fputc_width_x(char c, size_t x, FILE *fdout);
 struct list_head *get_data_from_directory(char *path);
 int insert_sorted_by_size(struct list_head *list, struct list_node *node);
 int parse_arguments(int argc, char **argv);
@@ -53,7 +57,6 @@ void print_list(struct list_head *list);
 void set_option(const char *option_name, char *option_argument);
 
 
-
 /* === GLOBAL VARIABLES === */
 struct option long_options[] = {
     { "show-hidden-entries", no_argument, 0, 0 },
@@ -103,6 +106,35 @@ inline void destroy_list(struct list_head *list) {
 }
 
 
+inline int fputc_all_cols(char c, FILE *fdout) {
+    struct winsize terminal;
+    ioctl(STDOUT_FILENO, TIOCGWINSZ, &terminal);
+    return fputc_width_x(c, ((terminal.ws_col == 0) ? 72 : terminal.ws_col), fdout);
+}
+
+
+/* Not the most performant way, but during output the time critical tasks are already done. */
+inline int fputc_width_x(char c, size_t x, FILE *fdout) {
+    size_t i=0;
+
+    if (fdout == NULL) {
+        LOGERR("ERROR: No output stream given.\n");
+        return EOF;
+    }
+
+    if ( ! isprint(c) ) { c = '?'; }
+
+    for (i=0; i<x; i++) {
+        if (fputc(c, fdout) == EOF) {
+            LOGERR("ERROR: Failed to write char 0x%02X to stream %d\n", c, fdout->_fileno);
+            return EOF;
+        }
+    }
+
+    return 1;
+}
+
+
 /* TODO: later when, other parameters are actively used move the action to a template */
 inline int insert_sorted_by_size(struct list_head *list, struct list_node *node) {
     struct list_node *ptr = NULL;
@@ -144,9 +176,9 @@ void print_list(struct list_head *list) {
     struct list_node *ptr;
     struct tm *tm = NULL;
     char timestamp[128];
+    size_t total_size = 0;
 
     if (list == NULL) return;
-
     ptr = list->first;
     while (ptr != NULL) {
         printf(" %8lu %2s ", ((ptr->fsize>=1024) ? (ptr->fsize/1024) : ptr->fsize),
@@ -160,10 +192,13 @@ void print_list(struct list_head *list) {
             strftime(timestamp, sizeof(timestamp), "%H:%M:%S", tm);
             printf(" %8s ", timestamp);
         }
-
         printf(" %s\n", ptr->fname);
+        total_size += ptr->fsize;
         ptr = ptr->next;
     }
+    fputc_all_cols('=', stdout);
+    printf("\nTotal size: %llu %s\n", ((total_size>1024) ? total_size/1024 : total_size),
+            ((total_size >= 1024) ? "kB" : ""));
 }
 
 
@@ -282,11 +317,11 @@ int main(int argc, char **argv) {
     /* TODO: Handle options */
     if (argc < 2) {
         fprintf(stderr, "Call: %s OPTIONS path_to_open\n", argv[0]);
-        fprintf(stderr, "\n OPTIONS are\n");
+        fprintf(stderr, "\nOPTIONS are\n");
         /* long name, short name, optional argument, explanation */
-        fprintf(stderr, "   %20s %2s %10s %s\n", "--long-timestamp", "-t", "",
+        fprintf(stderr, " %-25s %2s %10s %s\n", "--long-timestamp", "-t", "",
                 "Print timestamp in long form yyyymmdd HH:MM:SS ZONE");
-        fprintf(stderr, "   %20s %2s %10s %s\n", "--show-hidden-entries", "-v", "",
+        fprintf(stderr, " %-25s %2s %10s %s\n", "--show-hidden-entries", "-v", "",
                 "Show hidden entries in the directory");
         return EXIT_FAILURE;
     }
-- 
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