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/*
* Copyright (c) 2026 Dylan Araps
*
* 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.
*/
#ifndef DFM_PLATFORM_LINUX_H
#define DFM_PLATFORM_LINUX_H
#include <stdalign.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <sys/inotify.h>
#include "../lib/util.h"
#define ST_ATIM st_atim.tv_sec
#define ST_MTIM st_mtim.tv_sec
#define ST_CTIM st_ctim.tv_sec
struct platform {
int inotify_wd;
int inotify_fd;
union {
align_max _a;
char b[4096];
} in;
ssize_t inl;
ssize_t ino;
};
static inline int
fs_watch_init(struct platform *p)
{
p->inotify_wd = -1;
p->inotify_fd = inotify_init1(IN_NONBLOCK | IN_CLOEXEC);
return p->inotify_fd;
}
static inline void
fs_watch(struct platform *p, const char *s)
{
if (p->inotify_wd != -1)
inotify_rm_watch(p->inotify_fd, p->inotify_wd);
p->inotify_wd = inotify_add_watch(p->inotify_fd, s,
IN_CREATE|IN_DELETE|IN_MOVED_FROM|IN_MOVED_TO|IN_ATTRIB);
}
static inline int
fs_watch_pump(struct platform *p, const char **s, size_t *l)
{
*s = NULL;
if (p->inotify_fd == -1)
return 0;
if (p->ino >= p->inl) {
p->inl = read(p->inotify_fd, p->in.b, sizeof(p->in.b));
if (p->inl <= 0)
return 0;
p->ino = 0;
}
if (p->inl - p->ino < (ssize_t)sizeof(struct inotify_event))
return 0;
struct inotify_event *ev =
(struct inotify_event *)(void *)(p->in.b + p->ino);
ssize_t size = sizeof(struct inotify_event) + ev->len;
if (p->inl - p->ino < size)
return 0;
p->ino += size;
if (ev->mask & IN_Q_OVERFLOW)
return '!';
if (!ev->len)
return 0;
*s = ev->name;
*l = strlen(ev->name);
if (ev->mask & (IN_CREATE | IN_MOVED_TO))
return '+';
if (ev->mask & (IN_DELETE | IN_MOVED_FROM))
return '-';
if (ev->mask & IN_ATTRIB)
return '~';
return 0;
}
static inline void
fs_watch_free(struct platform *p)
{
if (p->inotify_wd != -1)
inotify_rm_watch(p->inotify_fd, p->inotify_wd);
if (p->inotify_fd != -1)
close(p->inotify_fd);
}
#define FS_WATCH 1
#endif // DFM_PLATFORM_LINUX_H
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