From a71120adf590f699c4b8d6249a340976575ea530 Mon Sep 17 00:00:00 2001
From: dzwdz
Date: Fri, 4 Aug 2023 01:20:38 +0200
Subject: libc: fs_dirinject2 for injecting multiple paths

---
 src/user/lib/fs/misc.c | 78 ++------------------------------------------------
 1 file changed, 2 insertions(+), 76 deletions(-)

(limited to 'src/user/lib/fs/misc.c')

diff --git a/src/user/lib/fs/misc.c b/src/user/lib/fs/misc.c
index c68d2be..2a39e9a 100644
--- a/src/user/lib/fs/misc.c
+++ b/src/user/lib/fs/misc.c
@@ -20,20 +20,6 @@ bool fork2_n_mount(const char *path) {
 	return false;
 }
 
-static int dir_seglen(const char *path) {
-	/* if path contains /, return its position + 1
-	 * otherwise, return strlen */
-	int len = 0;
-	while (path[len]) {
-		if (path[len] == '/') {
-			len++;
-			break;
-		}
-		len++;
-	}
-	return len;
-}
-
 void forward_open(hid_t reqh, const char *path, long len, int flags) {
 	// TODO use threads
 	// TODO solve for more complex cases, e.g. fs_union
@@ -41,7 +27,7 @@ void forward_open(hid_t reqh, const char *path, long len, int flags) {
 	 * but that should only hold the caller back, and not the fs driver.
 	 *
 	 * for example, running `httpd` in one term would prevent you from doing
-	 * basically anything on the second term, because fs_dir_inject would be
+	 * basically anything on the second term, because fs_dirinject would be
 	 * stuck on open()ing the socket */
 	if (!_sys_fork(FORK_NOREAP, NULL)) {
 		_sys_fs_respond(reqh, NULL, _sys_open(path, len, flags), FSR_DELEGATE);
@@ -150,66 +136,6 @@ void fs_union(const char **list) {
 	exit(0);
 }
 
-
-void fs_dir_inject(const char *path) {
-	struct fs_dir_handle {
-		const char *inject;
-		int delegate, inject_len;
-	};
-	const size_t path_len = strlen(path);
-	const size_t buflen = 1024;
-	char *buf = malloc(buflen);
-	if (!buf) exit(1);
-
-	for (;;) {
-		struct ufs_request res;
-		hid_t reqh = _sys_fs_wait(buf, buflen, &res);
-		if (reqh < 0) break;
-		struct fs_dir_handle *data = res.id;
-		switch (res.op) {
-			struct dirbuild db;
-			case VFSOP_OPEN:
-				if (buf[res.len - 1] == '/' &&
-						res.len < path_len && !memcmp(path, buf, res.len))
-				{
-					/* opening a directory that we're injecting into */
-					data = malloc(sizeof *data);
-					data->delegate = _sys_open(buf, res.len, res.flags);
-					data->inject = path + res.len;
-					data->inject_len = dir_seglen(data->inject);
-					_sys_fs_respond(reqh, data, 0, 0);
-				} else {
-					forward_open(reqh, buf, res.len, res.flags);
-				}
-				break;
-
-			case VFSOP_CLOSE:
-				if (data->delegate >= 0)
-					close(data->delegate);
-				free(data);
-				_sys_fs_respond(reqh, NULL, 0, 0);
-				break;
-
-			case VFSOP_READ:
-			case VFSOP_GETSIZE:
-				if (res.capacity > buflen)
-					res.capacity = buflen;
-				char *target = res.op == VFSOP_READ ? buf : NULL;
-				dir_start(&db, res.offset, target, res.capacity);
-				dir_appendl(&db, data->inject, data->inject_len);
-				if (data->delegate >= 0)
-					dir_append_from(&db, data->delegate);
-				_sys_fs_respond(reqh, target, dir_finish(&db), 0);
-				break;
-
-			default:
-				_sys_fs_respond(reqh, NULL, -1, 0);
-				break;
-		}
-	}
-	exit(0);
-}
-
 hid_t ufs_wait(char *buf, size_t len, struct ufs_request *req) {
 	hid_t reqh;
 	for (;;) {
@@ -240,7 +166,7 @@ bool mount_at_pred(const char *path) {
 	if (strcmp("/", path) && !fork2_n_mount("/")) {
 		_klogf("%s: dir", path);
 		setproctitle("d'%s'", path);
-		fs_dir_inject(path);
+		fs_dirinject(path);
 		exit(1);
 	}
 	return false; /* continue after the for loop */
-- 
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