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Added simple daemon and add event

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Night Kaly 2024-07-26 07:56:48 +01:00
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GPG key ID: 957D67B8DB7A119B
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the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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.POSIX:
.SUFFIXES:
CC = cc
VERSION = 1.0
TARGET = ssm
MANPAGE = $(TARGET).1
PREFIX ?= /usr/local
BINDIR = $(PREFIX)/bin
MANDIR = $(PREFIX)/share/man/man1
# Flags
LDFLAGS = $(shell pkg-config --libs libnotify)
CFLAGS = -O3 -march=native -mtune=native -pipe -s -std=c99 -flto -pedantic -Wall -D_DEFAULT_SOURCE -D_XOPEN_SOURCE=600 $(shell pkg-config --cflags libnotify)
SRC = ssm.c
$(TARGET): $(SRC)
$(CC) $(SRC) -o $@ $(CFLAGS) $(LDFLAGS)
dist:
mkdir -p $(TARGET)-$(VERSION)
cp -R README.md $(MANPAGE) $(TARGET) $(TARGET)-$(VERSION)
tar -cf $(TARGET)-$(VERSION).tar $(TARGET)-$(VERSION)
gzip $(TARGET)-$(VERSION).tar
rm -rf $(TARGET)-$(VERSION)
install: $(TARGET)
mkdir -p $(DESTDIR)$(BINDIR)
mkdir -p $(DESTDIR)$(MANDIR)
cp -p $(TARGET) $(DESTDIR)$(BINDIR)/$(TARGET)
chmod 755 $(DESTDIR)$(BINDIR)/$(TARGET)
cp -p $(MANPAGE) $(DESTDIR)$(MANDIR)/$(MANPAGE)
chmod 644 $(DESTDIR)$(MANDIR)/$(MANPAGE)
uninstall:
$(RM) $(DESTDIR)$(BINDIR)/$(TARGET)
$(RM) $(DESTDIR)$(MANDIR)/$(MANPAGE)
clean:
$(RM) $(TARGET)
all: $(TARGET)
.PHONY: all dist install uninstall clean

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# ssm
Simple Schedule Manager(ssm) is a highly scriptable scheduler.
# Usage
```
Simple Scheduler Manager 1.0.0
Usage: ssm <command>
help Show this help message
sched <time> <title> [description] Schedule an event
edit Edit schedule with $EDITOR
list <timerange> List all upcoming events
search Search for events
run Spawn notifier daemon
```
# Dependencies
- libnotify
# Building
You will need to run these with elevated privilages.
```
$ make
# make install
```
# Contributions
Contributions are welcomed, feel free to open a pull request.
# License
This project is licensed under the GNU Public License v3.0. See [LICENSE](https://github.com/night0721/ssm/blob/master/LICENSE) for more information.

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#define _POSIX_C_SOURCE 200809L
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <time.h>
#include <errno.h>
#include <sys/inotify.h>
#include <libnotify/notify.h>
#include "ssm.h"
#define BUF_LEN (10 * (sizeof(struct inotify_event) + NAME_MAX + 1))
#define MAX_LINE_LEN 4096
typedef struct {
time_t timestamp;
int alert; /* in ms */
char name[50];
char description[100];
int notified;
} event;
char *
get_database_path()
{
char *db = DATABASE_PATH;
char *db_path;
if (db[0] == '~') {
char *home = getenv("HOME");
if (home == NULL) {
fprintf(stderr, "HOME not defined");
return NULL;
}
db_path = malloc((strlen(db) + strlen(home)) * sizeof(char));
/* replace ~ with home */
snprintf(db_path, strlen(db) + strlen(home), "%s%s", home, db + 1);
} else {
db_path = strdup(db);
}
if (db_path == NULL) {
return NULL;
} else {
return db_path;
}
}
/*
* Convert timestmap to string
* format: 0 - YYYY-MM-DD HH:MM:SS
* format: 1 - HH:MM
*/
char *
convert_timestamp(time_t timestamp, int format)
{
struct tm *time_info = localtime(&timestamp);
char *time_buf = malloc(20 * sizeof(char));
if (format == 0) {
strftime(time_buf, 20, "%Y-%m-%d %H:%M:%S", time_info);
} else {
strftime(time_buf, 6, "%H:%M", time_info);
}
return time_buf;
}
void
load_events(event **events, int *num_events)
{
char *db_path = get_database_path();
if (db_path != NULL) {
FILE *file = fopen(db_path, "r");
if (!file) {
fprintf(stderr, "Cannot open database file\n");
exit(EXIT_FAILURE);
}
char line[MAX_LINE_LEN];
*num_events = 0;
while (fgets(line, sizeof(line), file)) {
(*num_events)++;
}
*events = malloc(sizeof(event) * (*num_events));
if (*events == NULL) {
perror("malloc");
exit(EXIT_FAILURE);
}
fseek(file, 0, SEEK_SET);
int i = 0;
while (fgets(line, sizeof(line), file)) {
sscanf(line, "%ld\t%[^\t]\t%[^\n]", &(*events)[i].timestamp, (*events)[i].name, (*events)[i].description);
i++;
}
fclose(file);
free(db_path);
}
}
void
add_event(time_t timestamp, char *name, char *description)
{
char *db_path = get_database_path();
FILE *file;
if (access(db_path, F_OK) != 0) {
file = fopen(db_path, "w");
} else {
file = fopen(db_path, "a");
}
if (!file) {
perror("fopen");
exit(EXIT_FAILURE);
}
fprintf(file, "%ld\t%s\t%s\n", timestamp, name, description);
fclose(file);
free(db_path);
char *time_buf = convert_timestamp(timestamp, 0);
printf("Added \"%s\" with description \"%s\" at \"%s\"\n", name, description, time_buf);
free(time_buf);
}
static void
send_notification(event to_alert)
{
int name_len = strlen(to_alert.name);
char name_buf[name_len + 7]; /* 7 for "ssm - " and NULL*/
snprintf(name_buf, name_len + 7, "ssm - %s", to_alert.name);
int description_len = strlen(to_alert.description);
char *time_buf = convert_timestamp(to_alert.timestamp, 1);
char description_buf[description_len + 6 + 3]; /* 1 space, 1 comma, 1 NULL */
snprintf(description_buf, description_len + 9, "%s, %s", to_alert.description, time_buf);
free(time_buf);
NotifyNotification *notification = notify_notification_new(name_buf, description_buf, "dialog-information");
if (notification == NULL) {
perror("notify_notification_new");
}
if (!notify_notification_show(notification, NULL)) {
perror("notify_notification_show");
}
g_object_unref(G_OBJECT(notification));
}
void
check_events(event *events, int *num_events)
{
time_t now = time(NULL);
for (int i = 0; i < *num_events; i++) {
if (events[i].timestamp > now && events[i].notified == 0) {
send_notification(events[i]);
events[i].notified = 1;
}
}
}
void
list_events(event *events, int *num_events)
{
load_events(&events, num_events);
for (int i = 0; i < *num_events; i++) {
printf("Timestamp: %d\nName: %s\nDescription: %s\n\n", events[i].timestamp, events[i].name, events[i].description);
}
free(events);
}
void
watch_file(event *events, int *num_events)
{
if (notify_init("ssm") < 0) {
perror("notify_init");
exit(EXIT_FAILURE);
}
int inotify_fd = inotify_init1(IN_NONBLOCK);
if (inotify_fd == -1) {
perror("inotify_init1");
exit(EXIT_FAILURE);
}
char *db_path = get_database_path();
int wd = inotify_add_watch(inotify_fd, db_path, IN_MODIFY);
free(db_path);
if (wd == -1) {
perror("inotify_add_watch");
exit(EXIT_FAILURE);
}
char buf[BUF_LEN] __attribute__ ((aligned(__alignof__(struct inotify_event))));
load_events(&events, num_events);
check_events(events, num_events);
free(events);
while (1) {
ssize_t len = read(inotify_fd, buf, BUF_LEN);
if (len == -1 && errno != EAGAIN) {
perror("read");
exit(EXIT_FAILURE);
}
if (len <= 0) {
sleep(1);
continue;
}
/* There is modification */
load_events(&events, num_events);
check_events(events, num_events);
free(events);
for (char *ptr = buf; ptr < buf + len; ptr += sizeof(struct inotify_event) + ((struct inotify_event *) ptr)->len) {
struct inotify_event *event = (struct inotify_event *) ptr;
if (event->mask & IN_MODIFY) {
printf("Detected modification in database file\n");
}
}
}
close(inotify_fd);
}
static void
usage(int code)
{
fprintf(code ? stderr : stdout,
"Simple Scheduler Manager %s\n\n"
"Usage: ssm <command>\n\n"
" help Show this help message\n"
" sched <time> <title> [description] Schedule an event\n"
" edit Edit schedule with $EDITOR\n"
" list <timerange> List all upcoming events\n"
" search Search for events\n"
" run Spawn notifier daemon\n"
, VERSION);
exit(code);
}
int
main(int argc, char **argv)
{
event *events = NULL;
int num_events = 0;
if (argc == 1) {
char *time_buf = convert_timestamp(time(NULL), 0);
printf("Current date: %s\n", time_buf);
printf("Upcoming events:\n");
list_events(events, &num_events);
free(time_buf);
return EXIT_SUCCESS;
}
if (strcmp(argv[1], "sched") == 0) {
/* time can be relative or absolute */
char *when = argv[2];
char *name = argv[3];
char *description = argv[4];
/* todo: accept time */
add_event(time(NULL) + 60, name, description);
} else if (strcmp(argv[1], "edit") == 0) {
char *editor = getenv("EDITOR");
if (editor == NULL) {
fprintf(stderr, "EDITOR not defined");
}
char *db_path = get_database_path();
char *cmd = malloc((strlen(editor) + strlen(db_path) + 1) * sizeof(char));
if (cmd == NULL) {
perror("malloc");
}
sprintf(cmd, "%s %s", editor, db_path);
/* spawn $EDITOR */
system(cmd);
free(cmd);
free(db_path);
} else if (strcmp(argv[1], "list") == 0) {
/* accept argv[2] as timerange */
list_events(events, &num_events);
} else if (strcmp(argv[1], "search") == 0) {
} else if (strcmp(argv[1], "run") == 0) {
watch_file(events, &num_events);
} else if (strcmp(argv[1], "help") == 0) {
usage(1);
}else {
usage(1);
}
return EXIT_FAILURE;
}

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#ifndef SSM_H
#define SSM_H
#define VERSION "1.0.0"
#define DATABASE_PATH "~/.local/share/ssm.tsv"
static const char editor[] = "nvim"; // Code editor
#endif