am e5efa982: am da3dec3c: Merge "Lose toolbox notify in favor of toybox inotifyd."

    mount \

    nandread \

    newfs_msdos \

    notify \

    ps \

    prlimit \

    renice \

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <stdint.h>

#include <fcntl.h>

#include <unistd.h>

#include <sys/ioctl.h>

#include <sys/inotify.h>

#include <errno.h>

int notify_main(int argc, char *argv[])

{

    int c;

    int nfd, ffd;

    int res;

	char event_buf[512];

    struct inotify_event *event;

	int event_mask = IN_ALL_EVENTS;

    int event_count = 1;

	int print_files = 0;

	int verbose = 2;

	int width = 80;

	char **file_names;

	int file_count;

	int id_offset = 0;

	int i;

	char *buf;

    do {

        c = getopt(argc, argv, "m:c:pv:w:");

        if (c == EOF)

            break;

        switch (c) {

        case 'm':

            event_mask = strtol(optarg, NULL, 0);

            break;

        case 'c':

            event_count = atoi(optarg);

            break;

		case 'p':

			print_files = 1;

			break;

        case 'v':

            verbose = atoi(optarg);

            break;

        case 'w':

            width = atoi(optarg);

            break;

        case '?':

            fprintf(stderr, "%s: invalid option -%c\n",

                argv[0], optopt);

            exit(1);

        }

    } while (1);

    if (argc <= optind) {

        fprintf(stderr, "Usage: %s [-m eventmask] [-c count] [-p] [-v verbosity] path [path ...]\n", argv[0]);

		return 1;

    }

    nfd = inotify_init();

    if(nfd < 0) {

        fprintf(stderr, "inotify_init failed, %s\n", strerror(errno));

        return 1;

    }

	file_names = argv + optind;

	file_count = argc - optind;

	for(i = 0; i < file_count; i++) {

		res = inotify_add_watch(nfd, file_names[i], event_mask);

		if(res < 0) {

	        fprintf(stderr, "inotify_add_watch failed for %s, %s\n", file_names[i], strerror(errno));

			return 1;

		}

		if(i == 0)

			id_offset = -res;

		if(res + id_offset != i) {

			fprintf(stderr, "%s got unexpected id %d instead of %d\n", file_names[i], res, i);

			return 1;

		}

	}

	buf = malloc(width + 2);

    while(1) {

		int event_pos = 0;

        res = read(nfd, event_buf, sizeof(event_buf));

        if(res < (int)sizeof(*event)) {

			if(errno == EINTR)

				continue;

            fprintf(stderr, "could not get event, %s\n", strerror(errno));

            return 1;

        }

		//printf("got %d bytes of event information\n", res);

		while(res >= (int)sizeof(*event)) {

			int event_size;

			event = (struct inotify_event *)(event_buf + event_pos);

			if(verbose >= 2)

		        printf("%s: %08x %08x \"%s\"\n", file_names[event->wd + id_offset], event->mask, event->cookie, event->len ? event->name : "");

			else if(verbose >= 2)

		        printf("%s: %08x \"%s\"\n", file_names[event->wd + id_offset], event->mask, event->len ? event->name : "");

			else if(verbose >= 1)

		        printf("%d: %08x \"%s\"\n", event->wd, event->mask, event->len ? event->name : "");

			if(print_files && (event->mask & IN_MODIFY)) {

				char* filename = file_names[event->wd + id_offset];

				char* alloc_buf = NULL;

				ssize_t read_len;

				char *display_name;

				int buflen;

				if(event->len) {

					if(asprintf(&alloc_buf, "%s/%s", filename, event->name) < 0) {

						fprintf(stderr, "asprintf failed, %s\n", strerror(errno));

						return 1;

					}

					filename = alloc_buf;

				}

				ffd = open(filename, O_RDONLY);

				display_name = (verbose >= 2 || event->len == 0) ? filename : event->name;

				buflen = width - strlen(display_name);

				read_len = read(ffd, buf, buflen);

				if(read_len > 0) {

					if(read_len < buflen && buf[read_len-1] != '\n') {

						buf[read_len] = '\n';

						read_len++;

					}

					if(read_len == buflen) {

						buf[--read_len] = '\0';

						buf[--read_len] = '\n';

						buf[--read_len] = '.';

						buf[--read_len] = '.';

						buf[--read_len] = '.';

					}

					else {

						buf[read_len] = '\0';

					}

					printf("%s: %s", display_name, buf);

				}

				close(ffd);

				free(alloc_buf);

			}

	        if(event_count && --event_count == 0)

	            return 0;

			event_size = sizeof(*event) + event->len;

			res -= event_size;

			event_pos += event_size;

		}

    }

    return 0;

}