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S

• sact - print current SCCS file-editing activity (DEVELOPMENT)
• scalbln(), scalblnf, scalblnl, scalbn, scalbnf, scalbnl, - compute exponent using FLT_RADIX
• scalb() - load exponent of a radix-independent floating-point number
• scalbn(), scalbnf, scalbnl, - compute exponent using FLT_RADIX
• scanf() - convert formatted input
• sccs - front end for the SCCS subsystem (DEVELOPMENT)
• sched_getparam() - get scheduling parameters (REALTIME)
• sched_get_priority_max(), sched_get_priority_min - get priority limits (REALTIME)
• sched_getscheduler() - get scheduling policy (REALTIME)
• sched.h - execution scheduling (REALTIME)
• sched_rr_get_interval() - get execution time limits (REALTIME)
• sched_setparam() - set scheduling parameters (REALTIME)
• sched_setscheduler() - set scheduling policy and parameters (REALTIME)
• sched_yield() - yield processor
• search.h - search tables
• sed - stream editor
• seed48() - seed uniformly distributed pseudo-random non-negative long integer generator
• seekdir() - set position of directory stream
• select() - synchronous I/O multiplexing
• semaphore.h - semaphores (REALTIME)
• sem_close() - close a named semaphore (REALTIME)
• semctl() - XSI semaphore control operations
• sem_destroy() - destroy an unnamed semaphore (REALTIME)
• semget() - get set of XSI semaphores
• sem_getvalue() - get the value of a semaphore (REALTIME)
• sem_init() - initialize an unnamed semaphore (REALTIME)
• sem_open() - initialize and open a named semaphore (REALTIME)
• semop() - XSI semaphore operations
• sem_post() - unlock a semaphore (REALTIME)
• sem_timedwait() - lock a semaphore (ADVANCED REALTIME)
• sem_trywait(), sem_wait - lock a semaphore (REALTIME)
• sem_unlink() - remove a named semaphore (REALTIME)
• sem_wait() - lock a semaphore (REALTIME)
• sendmsg() - send a message on a socket using a message structure
• send() - send a message on a socket
• sendto() - send a message on a socket
• set - set or unset options and positional parameters
• setbuf() - assign buffering to a stream
• setcontext() - set current user context
• setegid() - set effective group ID
• setenv() - add or change environment variable
• seteuid() - set effective user ID
• setgid() - set-group-ID
• setgrent() - reset group database to first entry
• sethostent() - network host database functions
• setitimer() - set value of interval timer
• setjmp.h - stack environment declarations
• setjmp() - set jump point for a non-local goto
• setkey() - set encoding key (CRYPT)
• setlocale() - set program locale
• setlogmask() - set log priority mask
• setnetent() - network database function
• setpgid() - set process group ID for job control
• setpgrp() - set process group ID
• setpriority() - set the nice value
• setprotoent() - network protocol database functions
• setpwent() - user database function
• setregid() - set real and effective group IDs
• setreuid() - set real and effective user IDs
• setrlimit() - control maximum resource consumption
• setservent() - network services database functions
• setsid() - create session and set process group ID
• setsockopt() - set the socket options
• setstate() - switch pseudo-random number generator state arrays
• setuid() - set user ID
• setutxent() - reset user accounting database to first entry
• setvbuf() - assign buffering to a stream
• shift - shift positional parameters
• shmat() - XSI shared memory attach operation
• shmctl() - XSI shared memory control operations
• shmdt() - XSI shared memory detach operation
• shmget() - get XSI shared memory segment
• shm_open() - open a shared memory object (REALTIME)
• shm_unlink() - remove a shared memory object (REALTIME)
• sh - shell, the standard command language interpreter
• shutdown() - shut down socket send and receive operations
• sigaction() - examine and change signal action
• sigaddset() - add a signal to a signal set
• sigaltstack() - set and get signal alternate stack context
• sigdelset() - delete a signal from a signal set
• sigemptyset() - initialize and empty a signal set
• sigfillset() - initialize and fill a signal set
• sighold(), sigignore, sigpause, sigrelse, sigset - signal management
• sigignore() - signal management
• siginterrupt() - allow signals to interrupt functions
• sigismember() - test for a signal in a signal set
• siglongjmp() - non-local goto with signal handling
• signal.h - signals
• signal() - signal management
• signbit() - test sign
• signgam, lgamma, lgammal - log gamma function
• sigpause() - remove a signal from the signal mask and suspend the thread
• sigpending() - examine pending signals
• sigprocmask() - examine and change blocked signals
• sigqueue() - queue a signal to a process (REALTIME)
• sigrelse() - remove a signal from signal mask or modify signal disposition
• sigsetjmp() - set jump point for a non-local goto
• sigset() - signal management
• sigsuspend() - wait for a signal
• sigtimedwait(), sigwaitinfo - wait for queued signals (REALTIME)
• sigwaitinfo() - wait for queued signals (REALTIME)
• sigwait() - wait for queued signals
• sinf() - sine function
• sinh(), sinhf, sinhl - hyperbolic sine function
• sinl() - sine function
• sin(), sinf, sinl - sine function
• sleep() - suspend execution for an interval of time
• sleep - suspend execution for an interval (Utility)
• snprintf() - print formatted output
• socket() - create an endpoint for communication
• socketpair() - create a pair of connected sockets
• sort - sort, merge, or sequence check text files
• spawn.h - spawn (ADVANCED REALTIME)
• split - split files into pieces
• sprintf() - print formatted output
• sqrt(), sqrtf, sqrtl - square root function
• srand48() - seed uniformly distributed double-precision pseudo-random number generator
• srandom() - seed pseudo-random number generator
• srand() - pseudo-random number generator
• sscanf() - convert formatted input
• stat() - get file status
• statvfs() - get file system information
• stdarg.h - handle variable argument list
• stdbool.h - boolean type and values
• stddef.h - standard type definitions
• stderr, stdin, stdout - standard I/O streams
• stdint.h - integer types
• stdio.h - standard buffered input/output
• stdlib.h - standard library definitions
• strcasecmp(), strncasecmp - case-insensitive string comparisons
• strcat() - concatenate two strings
• strchr() - string scanning operation
• strcmp() - compare two strings
• strcoll() - string comparison using collating information
• strcpy() - copy a string
• strcspn() - get length of a complementary substring
• strdup() - duplicate a string
• strerror(), strerror_r - get error message string
• strfmon() - convert monetary value to a string
• strftime() - convert date and time to a string
• string.h - string operations
• strings - find printable strings in files
• strings.h - string operations
• strip - remove unnecessary information from executable files (DEVELOPMENT)
• strlen() - get string length
• strncasecmp() - case-insensitive string comparison
• strncat() - concatenate a string with part of another
• strncmp() - compare part of two strings
• strncpy() - copy part of a string
• stropts.h - STREAMS interface (STREAMS)
• strpbrk() - scan string for byte
• strptime() - date and time conversion
• strrchr() - string scanning operation
• strspn() - get length of a substring
• strstr() - find a substring
• strtod(), strtof, strtold - convert string to a double-precision number
• strtof() - convert string to a double-precision number
• strtoimax(), strtoumax - convert string to integer type
• strtok(), strtok_r - split string into tokens
• strtold() - convert string to a double-precision number
• strtoll() - convert string to a long integer
• strtol(), strtoll - convert string to a long integer
• strtoul(), strtoull - convert string to an unsigned long
• strtoumax() - convert string to integer type
• strxfrm() - string transformation
• stty - set the options for a terminal
• swab() - swap bytes
• swapcontext() - swap user context
• swprintf() - print formatted wide-character output
• swscanf() - convert formatted wide-character input
• symlink() - make symbolic link to a file
• sync() - schedule file system updates
• sysconf() - get configurable system variables
• sys/ipc.h - XSI interprocess communication access structure
• syslog - definitions for system error logging
• syslog() - log a message
• sys/mman.h - memory management declarations
• sys/msg.h - XSI message queue structures
• sys/resource.h - definitions for XSI resource operations
• sys/select.h - select types
• sys/sem.h - XSI semaphore facility
• sys/shm.h - XSI shared memory facility
• sys/socket.h - main sockets header
• sys/stat.h - data returned by the stat() function
• sys/statvfs.h - VFS File System information structure
• system() - issue a command
• sys/timeb.h - additional definitions for date and time
• sys/time.h - time types
• sys/times.h - file access and modification times structure
• sys/types.h - data types
• sys/uio.h - definitions for vector I/O operations
• sys/un.h - definitions for UNIX domain sockets
• sys/utsname.h - system name structure
• sys/wait.h - declarations for waiting

• Saved Resource Limits
• Saved Set-Group-ID
• Saved Set-User-ID
• Scheduling
• Scheduling Allocation Domain
• Scheduling Contention Scope
• Scheduling Policy
• Scheduling Policy (General Concept)
• Screen
• Scroll
• Seconds Since the Epoch
• Semaphore
• Semaphore (General Concept)
• Semaphore Lock Operation
• Semaphore Unlock Operation
• Session
• Session Leader
• Session Lifetime
• Shared Memory Object
• Shell
• Shell, the
• Shell Script
• Signal
• Signal Stack
• Single-Quote
• Slash
• Socket
• Socket Address
• Soft Limit
• Source Code
• Space Character (<space>)
• Spawn
• Special Built-In
• Special Parameter
• Spin Lock
• Sporadic Server
• Standard Error
• Standard Input
• Standard Output
• Standard Utilities
• Stream
• STREAM
• STREAM End
• STREAM Head
• STREAMS Multiplexor
• Strictly Conforming POSIX Application
• Strictly Conforming XSI Application
• String
• Subprofiling Considerations
• Subshell
• Successfully Transferred
• Supplementary Group ID
• Suspended Job
• Symbolic Link
• Synchronized Input and Output
• Synchronized I/O Completion
• Synchronized I/O Data Integrity Completion
• Synchronized I/O File Integrity Completion
• Synchronized I/O Operation
• Synchronous I/O Operation
• Synchronously-Generated Signal
• System
• System Crash
• System Console
• System Databases
• System Documentation
• System Process
• System Reboot
• System Trace Event
• System-Wide