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| a64l Subroutine | Converts between long integers and base-64 ASCII strings. |
| abort Subroutine | Sends a SIGIOT signal to end the current process. |
| abs Subroutine | Computes absolute value, division, and double precision multiplication of integers. |
| absinterval Subroutine | Manipulates the expiration time of interval timers. |
| access Subroutine | Determines the accessibility of a file. |
| accessx Subroutine | Determines the accessibility of a file. |
| acct Subroutine | Enables and disables process accounting. |
| acl_chg Subroutine | Changes the access control information on a file. |
| acl_fchg Subroutine | Changes the access control information on a file. |
| acl_fget Subroutine | Gets the access control information of a file. |
| acl_fput Subroutine | Sets the access control information of a file. |
| acl_fset Subroutine | Sets the access control information of a file. |
| acl_get Subroutine | Gets the access control information of a file. |
| acl_put Subroutine | Sets the access control information of a file. |
| acl_set Subroutine | Sets the access control information of a file. |
| acos Subroutine | Computes inverse trigonometric functions. |
| acosh Subroutine | Computes inverse hyperbolic functions. |
| acosl Subroutine | Computes inverse trigonometric functions. |
| addch Subroutine | Adds a single-byte character and rendition to a window and advances the cursor. |
| addnstr Subroutine | Adds a string of multi-byte characters without rendition to a window and advances the cursor. |
| addssys Subroutine | Adds the SRCsubsys record to the subsystem object class. |
| addstr Subroutine | Adds a string of multi-byte characters without rendition to a window and advances the cursor. |
| adjtime Subroutine | Corrects the time to allow synchronization of the system clock. |
| advance Subroutine | Compiles and matches regular-expression patterns. |
| aio_cancel Subroutine | Cancels one or more outstanding asynchronous I/O requests. |
| aio_cancel64 Subroutine | Cancels one or more outstanding asynchronous I/O requests. |
| aio_error Subroutine | Retrieves the error status of an asynchronous I/O request. |
| aio_error64 Subroutine | Retrieves the error status of an asynchronous I/O request. |
| aio_read Subroutine | Reads asynchronously from a file. |
| aio_read64 Subroutine | Reads asynchronously from a file. |
| aio_return Subroutine | Retrieves the return status of an asynchronous I/O request. |
| aio_return64 Subroutine | Retrieves the return status of an asynchronous I/O request. |
| aio_suspend Subroutine | Suspends the calling process until one or more asynchronous I/O requests is completed. |
| aio_suspend64 Subroutine | Suspends the calling process until one or more asynchronous I/O requests is completed. |
| aio_write Subroutine | Writes to a file asynchronously. |
| aio_write64 Subroutine | Writes to a file asynchronously. |
| alarm Subroutine | Manipulates the expiration time of interval timers. |
| alloca Subroutine | Provides a memory allocator. |
| alphasort Subroutine | Scans or sorts directory contents. |
| asctime Subroutine | Converts the formats of date and time representations. |
| asctime_r Subroutine | Converts the formats of date and time representations. |
| asin Subroutine | Computes inverse trigonometric functions. |
| asinh Subroutine | Computes inverse hyperbolic functions. |
| asinl Subroutine | Computes inverse trigonometric functions. |
| assert Macro | Verifies a program assertion. |
| atan Subroutine | Computes inverse trigonometric functions. |
| atan2 Subroutine | Computes inverse trigonometric functions. |
| atan2l Subroutine | Computes inverse trigonometric functions. |
| atanh Subroutine | Computes inverse hyperbolic functions. |
| atanl Subroutine | Computes inverse trigonometric functions. |
| atexit Subroutine | Terminates a process. |
| atof Subroutine | Converts an ASCII string to a floating-point or double floating-point number. |
| atoff Subroutine | Converts an ASCII string to a floating-point or double floating-point number. |
| atoi Subroutine | Converts a string to a signed or unsigned long integer or long long integer. |
| atol Subroutine | Converts a string to a signed or unsigned long integer or long long integer. |
| attroff Subroutine | Restricted window attribute control functions. |
| attron Subroutine | Restricted window attribute control functions. |
| attrset Subroutine | Restricted window attribute control functions. |
| audit Subroutine | Enables and disables system auditing. |
| auditbin Subroutine | Defines files to contain audit records. |
| auditevents Subroutine | Gets or sets the status of system event auditing. |
| auditlog Subroutine | Appends an audit record to the audit trail file. |
| auditobj Subroutine | Gets or sets the auditing mode of a system data object. |
| auditpack Subroutine | Compresses and uncompresses audit bins. |
| auditproc Subroutine | Gets or sets the audit state of a process. |
| auditread Subroutine | Reads an audit record. |
| auditwrite Subroutine | Writes an audit record. |
| authenticate Subroutine | Verifies a user's name and password. |
| basename Subroutine | Return the last element of a path name. |
| baudrate Subroutine | Gets the terminal baud rate. |
| bcmp Subroutine | Performs bit and byte string operations. |
| bcopy Subroutine | Performs bit and byte string operations. |
| beep Subroutine | Sounds the audible alarm on the terminal. |
| bessel Subroutines | Computes Bessel functions. |
| bindprocessor Subroutine | Binds kernel threads to a processor. |
| box Subroutine | Draws borders from single-byte characters and renditions. |
| brk Subroutine | Changes data segment space allocation. |
| bsearch Subroutine | Performs a binary search. |
| btowc Subroutine | Single-byte to wide-character conversion. |
| bzero Subroutine | Performs bit and byte string operations. |
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