| 50 | using namespace wasmfs; |
| 51 | |
| 52 | int __syscall_dup3(int oldfd, int newfd, int flags) { |
| 53 | if (flags & ~O_CLOEXEC) { |
| 54 | return -EINVAL; |
| 55 | } |
| 56 | if (oldfd == newfd) { |
| 57 | return -EINVAL; |
| 58 | } |
| 59 | |
| 60 | auto fileTable = wasmFS.getFileTable().locked(); |
| 61 | auto oldOpenFile = fileTable.getEntry(oldfd); |
| 62 | if (!oldOpenFile) { |
| 63 | return -EBADF; |
| 64 | } |
| 65 | if (newfd < 0 || newfd >= WASMFS_FD_MAX) { |
| 66 | return -EBADF; |
| 67 | } |
| 68 | |
| 69 | // If the file descriptor newfd was previously open, it will just be |
| 70 | // overwritten silently. |
| 71 | (void)fileTable.setEntry(newfd, oldOpenFile); |
| 72 | return newfd; |
| 73 | } |
| 74 | |
| 75 | int __syscall_dup(int fd) { |
| 76 | auto fileTable = wasmFS.getFileTable().locked(); |