From d69d7614ea8b9720f934a94249ee8199bbcaf70c Mon Sep 17 00:00:00 2001 From: dzwdz Date: Sat, 13 Aug 2022 17:40:44 +0200 Subject: user: add /initctl for shutting the system down in a cleaner way --- src/user/app/init/driver/initctl.c | 40 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 src/user/app/init/driver/initctl.c (limited to 'src/user/app/init/driver/initctl.c') diff --git a/src/user/app/init/driver/initctl.c b/src/user/app/init/driver/initctl.c new file mode 100644 index 0000000..b8fbb9b --- /dev/null +++ b/src/user/app/init/driver/initctl.c @@ -0,0 +1,40 @@ +#include "driver.h" +#include +#include +#include +#include + +void initctl_drv(handle_t killswitch) { + struct fs_wait_response res; + char buf[64]; + const size_t buflen = sizeof buf; + while (!_syscall_fs_wait(buf, buflen, &res)) { + switch (res.op) { + case VFSOP_OPEN: + _syscall_fs_respond(NULL, res.len == 0 ? 0 : -1, 0); + break; + case VFSOP_WRITE: + /* null terminate */ + if (res.len > buflen - 1) + res.len = buflen - 1; + buf[res.len] = '\0'; + /* cut at first whitespace */ + for (size_t i = 0; buf[i]; i++) { + if (isspace(buf[i])) { + buf[i] = '\0'; + break; + } + } + if (!strcmp(buf, "halt")) { + _syscall_write(killswitch, "halt", 4, 0, 0); + exit(1); + } + _syscall_fs_respond(NULL, res.len, 0); + break; + default: + _syscall_fs_respond(NULL, -ENOSYS, 0); + break; + } + } + exit(1); +} -- cgit v1.2.3