| Rev | Author | # | Line |
|---|---|---|---|
| 1 | perry | 1 | !!NAME |
| 2 | PerryLorier | 2 | ioperm - set port input/output permissions |
| 1 | perry | 3 | |
| 4 | !!SYNOPSIS | ||
| 2 | PerryLorier | 5 | __#include <unistd.h>__ /* for libc5 */ |
| 6 | __#include <sys/io.h>__ /* for glibc */ | ||
| 1 | perry | 7 | |
| 2 | PerryLorier | 8 | __int ioperm(unsigned long__ ''from''__, unsigned long__ ''num''__, int__ ''turn_on''__);__ |
| 1 | perry | 9 | |
| 10 | !!DESCRIPTION | ||
| 2 | PerryLorier | 11 | ioperm(2) 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 |
| 12 | ioperm(2) requires root privileges. | ||
| 1 | perry | 13 | |
| 2 | PerryLorier | 14 | Only the first 0x3ff I/O ports can be specified in this manner. For more ports, the iopl(2) function must be used. Permissions are not inherited on fork, but on exec |
| 15 | they are. This is useful for giving port access permissions to non-privileged tasks. | ||
| 1 | perry | 16 | |
| 17 | !!RETURN VALUE | ||
| 2 | PerryLorier | 18 | On success, zero is returned. On error, -1 is returned, and ''errno'' is set appropriately. |
| 1 | perry | 19 | |
| 20 | !!CONFORMING TO | ||
| 2 | PerryLorier | 21 | ioperm(2) is Linux specific and should not be used in programs intended to be portable. |
| 1 | perry | 22 | |
| 23 | !!NOTES | ||
| 2 | PerryLorier | 24 | Libc5 treats it as a system call and has a prototype in ''<unistd.h>''. Glibc1 does not have a prototype. Glibc2 has a prototype both in ''<sys/io.h>'' and |
| 25 | in ''<sys/perm.h>''. Avoid the latter, it is available on i386 only. | ||
| 1 | perry | 26 | |
| 27 | !!SEE ALSO | ||
| 28 | iopl(2) |
lib/blame.php:177: Warning: Invalid argument supplied for foreach() (...repeated 9 times)