platform/bsd.h: initial BSD platform support.

Untested... based on how other file managers do it.

Related: #3

1 files changed, 96 insertions, 0 deletions

diff --git a/platform/bsd.h b/platform/bsd.h
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--- /dev/null
+++ b/platform/bsd.h
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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_BSD_H
+#define DFM_PLATFORM_BSD_H
+
+#include <stddef.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/event.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#include "../lib/util.h"
+
+#define ST_ATIM st_atimespec.tv_sec
+#define ST_MTIM st_mtimespec.tv_sec
+#define ST_CTIM st_ctimespec.tv_sec
+
+struct platform {
+  int kq;
+  int dfd;
+  struct kevent ev;
+};
+
+static inline int
+fs_watch_init(struct platform *p)
+{
+  p->dfd = -1;
+  p->kq = kqueue();
+  return p->kq;
+}
+
+static inline void
+fs_watch(struct platform *p, const char *path)
+{
+  if (p->dfd != -1) {
+    close(p->dfd);
+    p->dfd = -1;
+  }
+  p->dfd = open(path, O_EVTONLY);
+  if (p->dfd == -1) return;
+  EV_SET(&p->ev, p->dfd,
+    EVFILT_VNODE, EV_ADD|EV_CLEAR,
+    NOTE_WRITE|NOTE_DELETE|NOTE_RENAME|NOTE_ATTRIB, 0, NULL);
+  kevent(p->kq, &p->ev, 1, NULL, 0, NULL);
+}
+
+static inline int
+fs_watch_pump(struct platform *p, const char **s, size_t *l)
+{
+  *s = NULL;
+  *l = 0;
+  if (p->kq == -1 || p->dfd == -1)
+    return 0;
+  struct kevent o;
+  struct timespec ts = {0, 0};
+  int n = kevent(p->kq, NULL, 0, &o, 1, &ts);
+  if (n <= 0) return 0;
+  if (o.flags & EV_ERROR)     return '!';
+  if (o.fflags & NOTE_DELETE) return '-';
+  if (o.fflags & NOTE_RENAME) return '~';
+  if (o.fflags & NOTE_ATTRIB) return '~';
+  if (o.fflags & NOTE_WRITE)  return '+';
+  return 0;
+}
+
+static inline void
+fs_watch_free(struct platform *p)
+{
+  if (p->dfd != -1) close(p->dfd);
+  if (p->kq != -1)  close(p->kq);
+}
+
+#define FS_WATCH 1
+
+#endif // DFM_PLATFORM_BSD_H