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Page 785

 

<include/linux/soundcard.h>
0x80045007 SOUND_PCM_READ FILTER int *
0x00004300 SNDCTL_COPR_RESET void
0xCFB04301 SNDCTL_COPR_LOAD const struct copr_buffer *
0xC0144302 SNDCTL_COPR_RDATA struct copr_debug_buf * // I-O
0xC0144303 SNDCTL_COPR_RCODE struct copr_debug_buf * // I-O
0x40144304 SNDCTL_COPR_WDATA const struct copr_debug_buf *
0x40144305 SNDCTL_COPR_WCODE const struct copr_debug_buf *
0xC0144306 SNDCTL_COPR_RUN struct copr_debug_buf * // I-O
0xC0144307 SNDCTL_COPR_HALT struct copr_debug_buf * // I-O
0x4FA44308 SNDCTL_COPR_SENDMSG const struct copr_msg *
0x8FA44309 SNDCTL_COPR_RCVMSG struct copr_msg *
0x80044D00 SOUND_MIXER_READ_VOLUME int *
0x80044D01 SOUND_MIXER_READ_BASS int *
0x80044D02 SOUND_MIXER_READ_TREBLE int *
0x80044D03 SOUND_MIXER_READ_SYNTH int *
0x80044D04 SOUND_MIXER_READ_PCM int *
0x80044D05 SOUND_MIXER_READ_SPEAKER int *
0x80044D06 SOUND_MIXER_READ_LINE int *
0x80044D07 SOUND_MIXER_READ_MIC int *
0x80044D08 SOUND_MIXER_READ_CD int *
0x80044D09 SOUND_MIXER_READ_IMIX int *
0x80044D0A SOUND_MIXER_READ_ALTPCM int *
0x80044D0B SOUND_MIXER_READ_RECLEV int *
0x80044D0C SOUND_MIXER_READ_IGAIN int *
0x80044D0D SOUND_MIXER_READ_OGAIN int *
0x80044D0E SOUND_MIXER_READ_LINE1 int *
0x80044D0F SOUND_MIXER_READ_LINE2 int *
0x80044D10 SOUND_MIXER_READ_LINE3 int *
0x80044D1C SOUND_MIXER_READ_MUTE int *
0x80044D1D SOUND_MIXER_READ_ENHANCE int *
0x80044D1E SOUND_MIXER_READ_LOUD int *
0x80044DFF SOUND_MIXER_READ_RECSRC int *
0x80044DFE SOUND_MIXER_READ_DEVMASK int *
0x80044DFD SOUND_MIXER_READ_RECMASK int *
0x80044DFB SOUND_MIXER_READ_STEREODEVS int *
0x80044DFC SOUND_MIXER_READ_CAPS int *
0xC0044D00 SOUND_MIXER_WRITE_VOLUME int * // I-O
0xC0044D01 SOUND_MIXER_WRITE_BASS int * // I-O
0xC0044D02 SOUND_MIXER_WRITE_TREBLE int * // I-O
0xC0044D03 SOUND_MIXER_WRITE_SYNTH int * // I-O
0xC0044D04 SOUND_MIXER_WRITE_PCM int * // I-O
0xC0044D05 ] SOUND_MIXER_WRITE_SPEAKER int * // I-O

Page 786

 

<include/linux/soundcard.h>
0xC0044D06 SOUND_MIXER_WRITE_LINE int * // I-O
0xC0044D07 SOUND_MIXER_WRITE_MIC int * // I-O
0xC0044D08 SOUND_MIXER_WRITE_CD int * // I-O
0xC0044D09 SOUND_MIXER_WRITE_IMIX int * // I-O
0xC0044D0A SOUND_MIXER_WRITE_ALTPCM int * // I-O
0xC0044D0B SOUND_MIXER_WRITE_RECLEV int * // I-O
0xC0044D0C SOUND_MIXER_WRITE_IGAIN int * // I-O
0xC0044D0D SOUND_MIXER_WRITE_OGAIN int * // I-O
0xC0044D0E SOUND_MIXER_WRITE_LINE1 int * // I-O
0xC0044D0F SOUND_MIXER_WRITE_LINE2 int * // I-O
0xC0044D10 SOUND_MIXER_WRITE_LINE3 int * // I-O
0xC0044D1C SOUND_MIXER_WRITE_MUTE int * // I-O
0xC0044D1D SOUND_MIXER_WRITE_ENHANCE int * // I-O
0xC0044D1E SOUND_MIXER_WRITE_LOUD int * // I-O
0xC0044DFF SOUND_MIXER_WRITE_RECSRC int * // I-O 

<include/linux/umsdos fs.h>
0x000004D2 UMSDOS_READDIR_DOS struct umsdos_ioctl * // I-O
0x000004D3 UMSDOS_UNLINK_DOS const struct umsdos_ioctl *
0x000004D4 UMSDOS_RMDIR_DOS const struct umsdos_ioctl *
0x000004D5 UMSDOS_STAT_DOS struct umsdos_ioctl * // I-O
0x000004D6 UMSDOS_CREAT_EMD const struct umsdos_ioctl *
0x000004D7 UMSDOS_UNLINK_EMD const struct umsdos_ioctl *
0x000004D8 UMSDOS_READDIR_EMD struct umsdos_ioctl * // I-O
0x000004D9 UMSDOS_GETVERSION struct umsdos_ioctl *
0x000004DA UMSDOS_INIT_EMD void
0x000004DB UMSDOS_DOS_SETUP const struct umsdos_ioctl *
0x000004DC UMSDOS_RENAME_DOS const struct umsdos_ioctl * 

<include/linux/vt.h>
0x00005600 VT_OPENQRY int *
0x00005601 VT_GETMODE struct vt_mode *
0x00005602 VT_SETMODE const struct vt_mode *
0x00005603 VT_GETSTATE struct vt_stat *
0x00005604 VT_SENDSIG void
0x00005605 VT_RELDISP int
0x00005606 VT_ACTIVATE int
0x00005607 VT_WAI TACTI VE int
0x00005608 VT_DISALLOCATE int
0x00005609 VT_RESIZE const struct vt_sizes *
0x0000560A VT_RESIZEX const struct vt_consize *

Page 787

MORE ARGUMENTS

Some ioctls take a pointer to a structure that contains additional pointers. These are documented here in alphabetical order.

CDROMREADAUDIO takes an input pointer const struct cdrom read audio *. The buf field points to an output buffer of length nframes * CD FRAMESIZE RAW.

CDROMREADCOOKED, CDROMREADMODE1, CDROMREADMODE2, and CDROM-READRAW take an input pointer const struct cdrom msf *. They use the same pointer as an output pointer to char []. The length varies by request. For CDROMREADMODE1, most drivers use CD_FRAMESIZE, but the optics storage driver uses OPT BLOCKSIZE instead (both have the numerical value 2048).

CDROMREADCOOKED char [CD_FRAMESIZE]
CDROMREADMODE1 char [CD_FRAMESIZE or OPT_BLOCKSIZE]
CDROMREADMODE2 char [CD_FRAMESIZE_RAW0]
CDROMREADRAW char [CD_FRAMESIZE_RAW]

EQL_ENSLAVE, EQL_EMANCIPATE, EQL_GETSLAVECFG, EQL_SETSLAVECFG, EQL_GETMASTERCFG, and EQL_SETMASTERCFG take a structifreq *. The ifr data field is a pointer to another structure as follows:

EQL_ENSLAVE const struct slaving_request *
EQL_EMANCIPATE const struct slaving_request *
EQL_GETSLAVECFG struct slave_config * // I-O
EQL_SETSLAVECFG const struct slave_config *
EQL_GETMASTERCFG struct master_config *
EQL_SETMASTERCFG const struct master_config *

FDRAWCMD takes a struct floppy raw cmd *. If flags & FD RAW WRITE is nonzero, then data points to an input buffer of length length. If flags & FD RAW READ is nonzero, then data points to an output buffer of length length.

GIO_FONTX and PIO_FONTX take a struct console font desc * or a const struct console_font_desc *, respectively. chardata points to a buffer of char [charcount]. This is an output buffer for GIO_FONTX and an input buffer for PIO_FONTX.

GIO_UNIMAP and PIO_UNIMAP take a struct unimapdesc * or a const struct unimapdesc *, respectively. entries points to a buffer of struct unipair [entry ct]. This is an output buffer for GIO_UNIMAP and an input buffer for PIO_UNIMAP.

KDADDIO, KDDELIO, KDDISABIO, and KDENABIO enable or disable access to I/O ports. They are essentially alternate interfaces to ioperm.

KDMAPDISP and KDUNMAPDISP enable or disable memory mappings or I/O port access. They are not implemented in the kernel.

SCSI_IOCTL_PROBE_HOST takes an input pointer const int *, which is a length. It uses the same pointer as an output pointer to a char [] buffer of this length.

SIOCADDRT and SIOCDELRT take an input pointer whose type depends on the protocol:

Most protocols const struct rtentry *
AX.25 const struct ax25_route *
NET/ROM const struct nr_route_struct *

SIOCGIFCONF takes a struct ifconf *. The ifc buf field points to a buffer of length ifc len bytes, into which the kernel writes a list of type struct ifreq [].

SIOCSIFHWADDR takes an input pointer whose type depends on the protocol:

Most protocols const struct ifreq *
AX.25 const char [AX25_ADDR_LEN]

TIOCLINUX takes a const char *. It uses this to distinguish several independent subcases. In the following table, N + foo means foo after an N-byte pad. struct selection is implicitly defined in drivers/char/selection.c:

Page 788
TIOCLINUX-2 1 + const struct selection *
TIOCLINUX-3 void
TIOCLINUX-4 void
TIOCLINUX-5 4 + const struct f long [8]; g *
TIOCLINUX-6 char *
TIOCLINUX-7 char *
TIOCLINUX-10 1 + const char *

DUPLICATE ICOTLS

This list does not include ioctls in the range SIOCDEVPRIVATE and SIOCPROTOPRIVATE:
0x00000001 FDSETPRM FIBMAP
0x00000002 FDDEFPRM FIGETBSZ
0x00005382 CDROMAUDIOBUFSIZ SCSI_IOCTL_GET_IDLUN
0x00005402 SNDCTL_TMR_START TCSETS
0x00005403 SNDCTL_TMR_STOP TCSETSW
0x00005404 SNDCTL_TMR_CONTINUE TCSETSF

Linux, 17 September 1995

ioperm

ioperm—Sets port input/output permissions

SYNOPSIS 


#include <unistd.h>

int ioperm(unsigned long from, unsigned long num,intturn_on);

DESCRIPTION

ioperm sets the port access permission bits for the process for num bytes starting from port address from to the value turn_on. The use of ioperm requires root privileges.

Only the first 0¥3ff I/O ports can be specified in this manner. For more ports, the iopl function must be used. Permissions are not inherited on fork, but on exec they are. This is useful for giving port access permissions to nonprivileged tasks.

RETURN VALUE

On success, 0 is returned. On error, _1 is returned and errno is set appropriately.

CONFORMS TO

ioperm is Linux specific.

SEE ALSO 


iopl(2)

Linux, 21 January 1993

iopl

iopl—Changes I/O privilege level

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