計算機結構與作業系統(B)

(5 pts) The following line opens a file for write only.

int fd = open(file_name, O_CREAT | O_EXCL | O_WRONLY, new_file_mode);
if (fd == -1) {
    /* Handle Error */
}
...

Please indicate the sequence of executing the above line if fd is equal to -1, using the symbol in the circle.

The figure ("Opening a file") shows the standard schematic view of the open() system call flow across user space (the open(filename) call), kernel memory (the system-wide open-file table and the per-process open-file table), and secondary storage (the directory structure and the File Control Block). Labelled circles mark specific points along the flow; a full successful open traverses circles A → B → C → D (user-space call → directory lookup → system-wide open-file table entry → per-process open-file table entry, returning a valid fd), while circle E marks the short-circuit error-return path taken when the file cannot be opened (fd == -1), bypassing the open-file-table steps entirely.