...ip root:root. It is used to create a pseudoterminal master and slave pair. When a process opens /dev/ptmx , it gets a file descriptor for a pseudoterminal master and a pseudoter…...ip root:root. It is used to create a pseudoterminal master and slave pair. When a process opens /dev/ptmx , it gets a file descriptor for a pseudoterminal master and a pseudoter…...o note that a file descriptor is associated with a unique FUSE filesystem. In particular, opening a second copy of this device, will not allow access to resources created throug…...ons are provided by the loop block device: LOOP_SET_FD Associate the loop device with the open file whose file descriptor is passed as the (third) ioctl (2) argument. LOOP_CLR_F…...ons are provided by the loop block device: LOOP_SET_FD Associate the loop device with the open file whose file descriptor is passed as the (third) ioctl (2) argument. LOOP_CLR_F…...rewind) minor device numbers, n , and the “no-rewind” device numbers, ( n + 128). Devices opened using the principal device number will be sent a REWIND command when they are cl…...dev/random will no longer block except during early boot process. In earlier versions, if open (2) is called for /dev/random with the O_NONBLOCK flag, a subsequent read (2) will…...dev/random will no longer block except during early boot process. In earlier versions, if open (2) is called for /dev/random with the O_NONBLOCK flag, a subsequent read (2) will…...y daemon processes when they are invoked by a user at a terminal. The process attempts to open /dev/tty . If the open succeeds, it detaches itself from the terminal by using TIO…...s, x, y;} scrn; unsigned short s; unsigned short mask; unsigned char attrib; int ch; fd = open(console, O_RDWR); if (fd < 0) { perror(console); exit(EXIT_FAILURE); } if (ioctl(f…...s, x, y;} scrn; unsigned short s; unsigned short mask; unsigned char attrib; int ch; fd = open(console, O_RDWR); if (fd < 0) { perror(console); exit(EXIT_FAILURE); } if (ioctl(f…...e number of the CPU to access as listed in /proc/cpuinfo . The register access is done by opening the file and seeking to the MSR number as offset in the file, and then reading …...require additional input registers. Early i486 CPUs do not support the CPUID instruction; opening this device for those CPUs fails with EIO. SEE ALSO cpuid (1) Intel Corporation…...ill retry on errors, otherwise it will abort. The default is 0. int ioctl(int fd , LPABORTOPEN, int arg ) If arg is 0, open (2) will be aborted on error, otherwise error will be…...s/bus/pci/devices/ dev /cciss X /c X d Y /usage_count Displays the usage count (number of opens) of logical drive Y of controller X . SCSI tape drive and medium changer support …...rrupts, but another one can. The /dev/rtc (or /dev/rtc0 , /dev/rtc1 , etc.) device can be opened only once (until it is closed) and it is read-only. On read (2) and select (2) t…...• Since Linux 4.16: timeout packages are enabled by default. Each time the lirc device is opened, the LIRC_SET_REC_TIMEOUT operation can be used to disable (and, if desired, to …