AIX Documentation: Programmer's Reference:
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Programmer's Reference
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ualarm Manipulates the expiration time of interval timers.
uitrunc The floor subroutine, floorl subroutine, ceil subroutine, ceill subroutine, nearest subroutine, trunc subroutine, and rint subroutine round floating-point numbers to floating-point integer values. The itrunc subroutine and uitrunc subroutine round floating-point numbers to signed and unsigned integers, respectively. The fmod subroutine and fmodl subroutine compute the modulo remainder. The fabs subroutine and fabsl subroutine compute the floating-point absolute value.
ulimit Sets and gets user limits.
umask Sets and gets the value of the file creation mask.
umount Removes a virtual file system from the file tree.
umul_dbl Computes absolute value, division, and double precision multiplication of integers.
uname Gets the name of the current operating system.
unamex Gets the name of the current operating system.
unbufcall Cancels a bufcall request.
unctrl Generates a printable representation of a character.
unget_wch Pushes a character onto the input queue.
ungetc Pushes a character back into the input stream.
ungetch Pushes a character onto the input queue.
ungetwc Pushes a character back into the input stream.
unlink Removes a directory entry.
unlinkb Removes a message block from the head of a message.
unload Unloads a module.
unlockpt Unlocks a pseudo-terminal device.
unordered Determines classifications of floating-point numbers.
untimeout Cancels a pending timeout request.
untouchwin Window refresh control functions.
unweldq Removes a previously established weld connection between STREAMS queues.
user2netname Converts from a domain-specific user ID to a network name that is independent from the operating system.
usleep Suspends a current process from execution.
usrinfo Gets and sets user information about the owner of the current process.
ustat Gets file system statistics.
utime Sets file-access and modification times.
utimes Sets file-access and modification times.
utmpname Accesses utmp file entries.
utrchook Records a trace event.
uuid_decode Converts a character-string representation of a Universal Unique Identifier (UUID) into a UUID.
uuid_encode Converts a Universal Unique Identifier (UUID) into its character-string representation.
uuid_gen Generates a new Universal Unique Identifier (UUID).
uvmount Removes a virtual file system from the file tree.