Michael Kerrisk deleted the old ioctl_list man page last year because nobody was maintaining it: https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/commit/man2?id=3de87d46840d But it's not actually that _hard_, just time consuming. There are about 3500 interesting ioctl macro definitions in the current kernel source: $ egrep --include '*.[ch]' -r '[^A-Z]_IO(|C|W|R|WR)[(]' * | \ grep -v 'drivers/staging' | grep -v 'tools/' | wc -l 3533 Each of which boils down to some entry point handling it and handing it off to a function that does a thing. Random example, the symbol SPI_IOC_RD_MODE from the above list (without the wc -l) greps to drivers/spi/spidev.c in function spidev_ioctl which winds up being: case SPI_IOC_RD_MODE: retval = put_user(spi->mode & SPI_MODE_MASK, (__u8 __user *)arg); which is struct spi_device *spi; which is defined in include/linux/spi/spi.h (Trick: grep spi_device include/ -r | grep '{' ) and then there's a comment block before the header which has: * @mode: The spi mode defines how data is clocked out and in. * This may be changed by the device's driver. * The "active low" default for chipselect mode can be overridden * (by specifying SPI_CS_HIGH) as can the "MSB first" default for * each word in a transfer (by specifying SPI_LSB_FIRST). So that ioctl reads that info into the supplied field. It would be really nice if there was an automated way to do this, but so far... Rob
