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initiate commitment protocol

master
Alessandro Mauri 10 months ago
commit
30fdeacab4
5 changed files with 183 additions and 0 deletions
  1. +5
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      .gitignore
  2. +21
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      LICENSE
  3. +0
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      README.md
  4. +147
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      automount.c
  5. +10
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      makefile

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.gitignore View File

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automount*
tests/**
!**/*.c
!**/*.c

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LICENSE View File

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MIT License
Copyright (c) 2020 Alessandro Mauri
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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README.md View File


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automount.c View File

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/*
* MIT License
*
* Copyright (c) 2020 Alessandro Mauri
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#define _POSIX_C_SOURCE 200809L
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <unistd.h>
#include <poll.h>
#include <sys/inotify.h>
#include <sys/epoll.h>
/* ANSI colors escape codes */
#define ANSI_COLOR_RED "\x1b[31m"
#define ANSI_COLOR_GREEN "\x1b[32m"
#define ANSI_COLOR_YELLOW "\x1b[33m"
#define ANSI_COLOR_BLUE "\x1b[34m"
#define ANSI_COLOR_MAGENTA "\x1b[35m"
#define ANSI_COLOR_CYAN "\x1b[36m"
#define ANSI_COLOR_RESET "\x1b[0m"
#define DEV_BLOCK_ROOT "/dev/block/"
#define red(str) ANSI_COLOR_RED str ANSI_COLOR_RESET
#define yellow(str) ANSI_COLOR_YELLOW str ANSI_COLOR_RESET
static void die (const char *, ...);
static void usage (void);
static const char * get_path (const char *);
int main (int argc, char *argv[])
{
struct pollfd watchpoll = {0, POLLIN, 0};
const struct inotify_event *event;
char buf[4096], strbuf[256];
char *ptr;
int opt, len, fd;
while ((opt = getopt(argc, argv, "h")) != -1) {
switch (opt) {
case 'h':
usage();
exit(EXIT_SUCCESS);
break;
default:
puts(red("Option not recognized\n"));
usage();
exit(EXIT_FAILURE);
break;
}
}
if ((fd = inotify_init()) < 0)
die("error initializing inotify watch list");
watchpoll.fd = fd;
if (inotify_add_watch(fd, DEV_BLOCK_ROOT, IN_CREATE | IN_DELETE) < 0)
die ("error adding " DEV_BLOCK_ROOT " to the watch list");
for (;poll(&watchpoll, 1, -1);) {
if (watchpoll.revents != POLLIN)
continue;
len = read(watchpoll.fd, buf, sizeof(buf));
if (len < 0) {
printf(red("read error: %s\n"), strerror(errno));
break;
} else if (!len) {
puts("No data to read\n");
break;
}
for (ptr = buf; ptr < buf + len;
ptr += sizeof(struct inotify_event) + event->len) {
event = (const struct inotify_event *) ptr;
if(!event->len)
continue;
strcpy(strbuf, DEV_BLOCK_ROOT);
strcat(strbuf, event->name);
printf(yellow("%s: %s\n"), event->mask & IN_CREATE ? "Created" : "Removed", get_path(strbuf));
}
}
die("polling interrupted");
close(watchpoll.fd);
return 0;
}
static void die(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
fputs(ANSI_COLOR_RED, stderr);
vfprintf(stderr, fmt, ap);
if (fmt[0] && fmt[strlen(fmt) - 1] == ':') {
fputc(' ', stderr);
perror(NULL);
} else {
fputc('\n', stderr);
}
fputs(ANSI_COLOR_RESET, stderr);
va_end(ap);
exit(errno ? errno : 1);
}
static void usage (void)
{
puts("Usage: automount [-h]\n"
"-h print this message\n");
}
static const char * get_path (const char *sym)
{
static char buf[256];
memset(buf, 0, 256);
readlink(sym, buf, 256);
if (buf[255])
return NULL;
return buf;
}

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makefile View File

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CFLAGS = -Wall -Werror -pedantic -O2 -std=c99
CC = gcc
automount: automount.c
debug: automount.c
${CC} ${LDFLAGS} -O0 -g -o automount_debug $?
clean:
rm -f automount automount_debug

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