From d98c6dd0954bd753a9150d39364f3866579cf2f0 Mon Sep 17 00:00:00 2001 From: dzwdz Date: Wed, 19 Oct 2022 14:51:02 +0200 Subject: user/logfs: a simple demo of the fs api --- src/user/app/logfs/logfs.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 src/user/app/logfs/logfs.c (limited to 'src/user') diff --git a/src/user/app/logfs/logfs.c b/src/user/app/logfs/logfs.c new file mode 100644 index 0000000..ba25564 --- /dev/null +++ b/src/user/app/logfs/logfs.c @@ -0,0 +1,34 @@ +#include +#include +#include +#include +#include +#include + +_Noreturn void fs(void) { + const size_t buflen = 1024; + char *buf = malloc(buflen); + if (!buf) err(1, "malloc"); + for (;;) { + struct ufs_request req; + handle_t reqh = ufs_wait(buf, buflen, &req); + if (reqh < 0) errx(1, "ufs_wait error"); + + switch (req.op) { + case VFSOP_OPEN: + printf("[logfs] open(\"%s\", 0x%x)\n", buf, req.flags); + forward_open(reqh, buf, req.len, req.flags); + break; + default: + /* Unsupported vfs operation. + * Currently if you never create your own file descriptors you won't receive + * anything but VFSOP_OPEN, but it's idiomatic to handle this anyways. */ + _syscall_fs_respond(reqh, NULL, -1, 0); + break; + } + } +} + +int main(void) { + fs(); +} -- cgit v1.2.3