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cap_fcntls_limit(2) [freebsd man page]

CAP_FCNTLS_LIMIT(2)					      BSD System Calls Manual					       CAP_FCNTLS_LIMIT(2)

NAME
cap_fcntls_limit, cap_fcntls_get -- manage allowed fcntl commands LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <sys/capsicum.h> int cap_fcntls_limit(int fd, uint32_t fcntlrights); int cap_fcntls_get(int fd, uint32_t *fcntlrightsp); DESCRIPTION
If a file descriptor is granted the CAP_FCNTL capability right, the list of allowed fcntl(2) commands can be selectively reduced (but never expanded) with the cap_fcntls_limit() system call. A bitmask of allowed fcntls commands for a given file descriptor can be obtained with the cap_fcntls_get() system call. FLAGS
The following flags may be specified in the fcntlrights argument or returned in the fcntlrightsp argument: CAP_FCNTL_GETFL Permit F_GETFL command. CAP_FCNTL_SETFL Permit F_SETFL command. CAP_FCNTL_GETOWN Permit F_GETOWN command. CAP_FCNTL_SETOWN Permit F_SETOWN command. RETURN VALUES
Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error. ERRORS
cap_fcntls_limit() succeeds unless: [EBADF] The fd argument is not a valid descriptor. [EINVAL] An invalid flag has been passed in fcntlrights. [ENOTCAPABLE] fcntlrights would expand the list of allowed fcntl(2) commands. cap_fcntls_get() succeeds unless: [EBADF] The fd argument is not a valid descriptor. [EFAULT] The fcntlrightsp argument points at an invalid address. SEE ALSO
cap_ioctls_limit(2), cap_rights_limit(2), fcntl(2) HISTORY
Support for capabilities and capabilities mode was developed as part of the TrustedBSD Project. AUTHORS
This function was created by Pawel Jakub Dawidek <pawel@dawidek.net> under sponsorship of the FreeBSD Foundation. BSD
March 27, 2014 BSD

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CAP_IOCTLS_LIMIT(2)					      BSD System Calls Manual					       CAP_IOCTLS_LIMIT(2)

NAME
cap_ioctls_limit, cap_ioctls_get -- manage allowed ioctl commands LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <sys/capsicum.h> int cap_ioctls_limit(int fd, const unsigned long *cmds, size_t ncmds); ssize_t cap_ioctls_get(int fd, unsigned long *cmds, size_t maxcmds); DESCRIPTION
If a file descriptor is granted the CAP_IOCTL capability right, the list of allowed ioctl(2) commands can be selectively reduced (but never expanded) with the cap_ioctls_limit() system call. The cmds argument is an array of ioctl(2) commands and the ncmds argument specifies the number of elements in the array. There can be up to 256 elements in the array. The list of allowed ioctl commands for a given file descriptor can be obtained with the cap_ioctls_get() system call. The cmds argument points at memory that can hold up to maxcmds values. The function populates the provided buffer with up to maxcmds elements, but always returns the total number of ioctl commands allowed for the given file descriptor. The total number of ioctls commands for the given file descriptor can be obtained by passing NULL as the cmds argument and 0 as the maxcmds argument. If all ioctl commands are allowed (CAP_IOCTL capability right is assigned to the file descriptor and the cap_ioctls_limit() system call was never called for this file descriptor), the cap_ioctls_get() system call will return CAP_IOCTLS_ALL and won't modify the buffer pointed to by the cmds argument. RETURN VALUES
The cap_ioctls_limit() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error. The cap_ioctls_get() function, if successful, returns the total number of allowed ioctl commands or the value CAP_IOCTLS_ALL if all ioctls commands are allowed. On failure the value -1 is returned and the global variable errno is set to indicate the error. ERRORS
cap_ioctls_limit() succeeds unless: [EBADF] The fd argument is not a valid descriptor. [EFAULT] The cmds argument points at an invalid address. [EINVAL] The ncmds argument is greater than 256. [ENOTCAPABLE] cmds would expand the list of allowed ioctl(2) commands. cap_ioctls_get() succeeds unless: [EBADF] The fd argument is not a valid descriptor. [EFAULT] The cmds argument points at invalid address. SEE ALSO
cap_fcntls_limit(2), cap_rights_limit(2), ioctl(2) HISTORY
Support for capabilities and capabilities mode was developed as part of the TrustedBSD Project. AUTHORS
This function was created by Pawel Jakub Dawidek <pawel@dawidek.net> under sponsorship of the FreeBSD Foundation. BSD
March 27, 2014 BSD

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