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-rw-r--r--dir_monitor.c337
1 files changed, 0 insertions, 337 deletions
diff --git a/dir_monitor.c b/dir_monitor.c
deleted file mode 100644
index 9e993a8..0000000
--- a/dir_monitor.c
+++ /dev/null
@@ -1,337 +0,0 @@
-/* SPDX-License-Identifier: Apache-2.0 */
-
-/* Copyright 2025 Thorsten Töpper
- *
- * dir_monitor - print specified stat() information from entries of a given
- * directory to stdout. Call it via watch for repeated output to a terminal.
- *
- * vim:ts=4:sw=4:expandtab
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <ctype.h>
-#include <getopt.h>
-#include <stdint.h>
-#include <errno.h>
-#include <sys/types.h>
-#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__);}
-
-#ifdef DEBUGBUILD
-#define DBGTRC(...) LOGERR(__VA_ARGS__)
-#else
-#define DBGTRC(...)
-#endif
-
-
-
-/* === DEFINITIONS === */
-#define PATH_SEP '/'
-
-struct list_node {
- struct list_node *next;
- size_t fsize;
- char fname[256];
- time_t ftime; /* can be creation, access or modification */
-};
-
-struct list_head {
- struct list_node *first;
-};
-
-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);
-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 },
- { "long-timestamp", no_argument, 0, 0 },
- { 0, 0, 0, 0 }
-};
-bool option_show_hidden_entries = false;
-bool option_timestamp_long = false;
-
-
-
-/* === IMPLEMENTATION === */
-inline struct list_node *create_node(char *fname, size_t fsize, time_t ftime) {
- struct list_node *node = NULL;
-
- if (fname == NULL || fname[0] == '\0') {
- LOGERR("ERROR: No valid filename given\n");
- return NULL;
- }
-
- if ((node = calloc(1, sizeof(struct list_node))) == NULL) {
- LOGERR("ERROR: Failed allocate memory for node: %s\n", strerror(errno));
- return NULL;
- }
-
- node->next = NULL;
- node->fsize = fsize;
- node->ftime = ftime;
- strncpy(node->fname, fname, 256);
- return node;
-}
-
-
-inline void destroy_list(struct list_head *list) {
- struct list_node *ptr = NULL;
- if (list == NULL)
- return;
- while (list->first != NULL) {
- ptr = list->first->next;
- if (ptr == NULL) {
- free(list->first);
- break;
- }
- list->first->next = ptr->next;
- free(ptr);
- }
- free(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;
-
- if (list == NULL) { LOGERR("ERROR: No list given.\n"); return -1; }
- if (node == NULL) { LOGERR("ERROR: No node given.\n"); return -2; }
-
- if (list->first == NULL) {
- list->first = node;
- return 0;
- }
-
- if (node->fsize > list->first->fsize) {
- node->next = list->first;
- list->first = node;
- return 0;
- }
-
- ptr = list->first;
- while (ptr != NULL) {
- if (ptr->next == NULL) {
- ptr->next = node;
- return 0;
- }
- if (node->fsize > ptr->next->fsize) {
- node->next = ptr->next;
- ptr->next = node;
- return 0;
- }
- ptr = ptr->next;
- }
-
- return -3;
-}
-
-
-/* The most simple default output, formatted output is planned */
-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),
- ((ptr->fsize >= 1024) ? "kB" : ""));
-
- tm = localtime(&ptr->ftime);
- if (option_timestamp_long) {
- strftime(timestamp, sizeof(timestamp), "%Y%m%d %H:%M:%S %Z", tm);
- printf(" %20s ", timestamp);
- } else {
- 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" : ""));
-}
-
-
-/* TODO: When sorting via different parameters is possible, the call needs adjustments */
-struct list_head *get_data_from_directory(char *path) {
- char *fullpath = NULL, *fname_in_path = NULL;
- DIR *dir = NULL;
- size_t l;
- struct dirent *de = NULL;
- struct list_node *tmp = NULL;
- struct list_head *list = NULL;
- struct stat stat_res;
-
- if (path == NULL) {
- LOGERR("ERROR: No path given.\n");
- return NULL;
- }
-
- l = strlen(path);
- /* 258 filename and possibly required PATH_SEP and of course string termination */
- if ((fullpath = calloc(l+258, sizeof(char))) == NULL) {
- LOGERR("ERROR: Failed to allocate memory for list head.\n");
- return NULL;
- }
- sprintf(fullpath, "%s%c", path, ((path[l-1] == PATH_SEP) ? '\0' : PATH_SEP));
- fname_in_path = (fullpath[l] == PATH_SEP) ? &(fullpath[l+1]) : &(fullpath[l]) ;
-
- if ((dir = opendir(path)) == NULL) {
- LOGERR("ERROR: Failed to open directory '%s': %s (errno %d)\n",
- path, strerror(errno), errno);
- return NULL;
- }
-
- /* TBH: In case those few bytes are not available, the process will be killed anyways */
- if ((list = calloc(1, sizeof(struct list_head))) == NULL) {
- LOGERR("ERROR: Failed to allocate memory for list head.\n");
- closedir(dir);
- return NULL;
- }
-
- errno = 0;
- /* Show hidden entries code is UNIXoid specific, needs to be adjusted for portability */
- while ((de = readdir(dir)) != NULL) {
- if (de->d_name[0] == '.' && option_show_hidden_entries == false)
- continue;
-
- sprintf(fname_in_path, "%s", de->d_name);
- DBGTRC("DEBUG: fullpath: '%s'\n", fullpath);
- if (lstat(fullpath, &stat_res) != 0) {
- LOGERR("ERROR: lstat call on '%s' failed: %s (errno %d)\n",
- fullpath, strerror(errno), errno);
- continue;
- }
- /* currently ignoring return values */
- tmp = create_node(de->d_name, stat_res.st_size, stat_res.st_mtime);
- insert_sorted_by_size(list, tmp);
- }
-
- free(fullpath);
- closedir(dir);
- return list;
-}
-
-
-void set_option(const char *option_name, char *option_argument) {
- if (option_name == NULL)
- return;
-
- if (strcmp(option_name, "show-hidden-entries") == 0) {
- option_show_hidden_entries = true;
- return;
- }
-
- if (strcmp(option_name, "long-timestamp") == 0) {
- option_timestamp_long = true;
- return;
- }
-
- LOGERR("ERROR: Option '%s' not recognized\n.", option_name);
-}
-
-int parse_arguments(int argc, char **argv) {
- int c = 0, index;
-
- while(1) {
- index = 0;
- c = getopt_long(argc, argv, "tv", long_options, &index);
-
- if (c == -1) {
- break;
- }
-
- switch (c) {
- case 0:
- set_option(long_options[index].name, optarg);
- break;
- case 't':
- option_timestamp_long = true;
- break;
- case 'v':
- option_show_hidden_entries = true;
- break;
- default:
- LOGERR("ERROR: unrecognized option '0x%02X'\n", c);
- break;
- }
- }
-
- return optind;
-}
-
-
-int main(int argc, char **argv) {
- struct list_head *list = NULL;
- int path_index = 1;
- /* TODO: Handle options */
- if (argc < 2) {
- fprintf(stderr, "Call: %s OPTIONS path_to_open\n", argv[0]);
- fprintf(stderr, "\nOPTIONS are\n");
- /* long name, short name, optional argument, explanation */
- fprintf(stderr, " %-25s %2s %10s %s\n", "--long-timestamp", "-t", "",
- "Print timestamp in long form yyyymmdd HH:MM:SS ZONE");
- fprintf(stderr, " %-25s %2s %10s %s\n", "--show-hidden-entries", "-v", "",
- "Show hidden entries in the directory");
- return EXIT_FAILURE;
- }
- path_index = parse_arguments(argc, argv);
- list = get_data_from_directory(argv[path_index]);
- print_list(list);
- destroy_list(list);
- return EXIT_SUCCESS;
-}
-
generated by cgit v1.2.3-70-g09d2 (git 2.51.0) at 2025-12-29 16:20:59 +0000