Library functions

This topic describes the z/OS® C/C++ runtime library functions, including the built-in library functions used by the IBM® z/OS C/C++ compilers.

Names
Unsupported functions and external variables in AMODE 64
Standards
Using C include files from C++
Built-in functions
IEEE binary floating-point
IEEE decimal floating-point
External variables
The __restrict__ macro
The __NORETURN macro
The __noreturn__ macro
abort() — Stop a program
abs(), absf(), absl() — Calculate integer absolute value
accept() — Accept a new connection on a socket
accept4() — Accept a new connection on a socket
accept_and_recv() — Accept connection and receive first message
access() — Determine whether a file can be accessed
acl_create_entry() — Add a new extended ACL entry to the ACL
acl_delete_entry() — Delete an extended ACL entry from the ACL
acl_delete_fd() — Delete an ACL by file descriptor
acl_delete_file() — Delete an ACL by file name
acl_first_entry() — Return to beginning of ACL working storage
acl_free() — Release memory allocated to an ACL data object
acl_from_text() — Create an ACL from text
acl_get_entry() — Get an ACL entry
acl_get_fd() — Get ACL by file descriptor
acl_get_file() — Get ACL by file name
acl_init() — Initialize ACL working storage
acl_set_fd() — Set an ACL by file descriptor
acl_set_file() — Set an ACL by file name
acl_sort() — Sort the extended ACL entries
acl_to_text() — Convert an ACL to text
acl_update_entry() — Update the extended ACL entry
acl_valid() — Validate an ACL
acos(), acosf(), acosl() — Calculate arccosine
acosd32(), acosd64(), acosd128() - Calculate arccosine
acosh(), acoshf(), acoshl() — Calculate hyperbolic arccosine
acoshd32(), acoshd64(), acoshd128() - Calculate hyperbolic arccosine
advance() — Pattern match given a compiled regular expression
__ae_correstbl_query() — Return coded character set ID type (ASCII and EBCDIC)
aio_cancel() — Cancel an asynchronous I/O request
aio_error() — Retrieve error status for an asynchronous I/O operation
aio_read() — Asynchronous read from a socket
aio_return() — Retrieve status for an asynchronous I/O operation
aio_suspend() — Wait for an asynchronous I/O request
aio_write() — Asynchronous write to a socket
alarm() — Set an alarm
aligned_alloc() — Allocating aligned memory blocks
alloca() — Allocate storage from the stack
arm_bind_thread() — Bind the current thread to a given transaction
arm_blocked() — Indicate the processing of a transaction is blocked
arm_correlator_get_length() — Get the actual size of the transaction correlator
arm_end_application() — Undefines an ARM application
arm_get_correlator_max_length() — Get the max length of the transaction correlator
arm_get_timestamp() — Get the current timestamp
arm_init_application() — Defines an ARM application
arm_init_transaction_type() — Defines and initializes an ARM transaction type
arm_start_transaction() — Mark the start of an ARM transaction
arm_stop_transaction() — Mark the end of an ARM transaction
arm_unbind_thread() — Unbind the current thread to a given transaction
arm_unblocked() — Indicate the processing of a transaction is no longer blocked
arm_update_transaction() — Update a given transaction
asctime(), asctime64() — Convert time to character string
asctime_r(), asctime64_r() — Convert date and time to a character string
asin(), asinf(), asinl() — Calculate arcsine
asind32(), asind64(), asind128() - Calculate arcsine
asinh(), asinhf(), asinhl() — Calculate hyperbolic arcsine
asinhd32(), asinhd64(), asinhd128() - Calculate hyperbolic arcsine
asprintf(), vasprintf() — Print to allocated string
assert() — Verify condition
atan(), atanf(), atanl(), atan2(), atan2f(), atan2l() — Calculate arctangent
atand32(), atand64(), atand128(), atan2d32(), atan2d64(), atan2d128() - Calculate arctangent
atanh(), atanhf(), atanhl() — Calculate hyperbolic arctangent
atanhd32(), atanhd64(), atanhd128() - Calculate hyperbolic arctangent
__atanpid32(), __atanpid64(), __atanpid128() - Calculate arctangent(x)/pi
atexit() — Register program termination function
__atoe() — ISO8859-1 to EBCDIC string conversion
__atoe_l() — ISO8859-1 to EBCDIC conversion operation
atof() — Convert character string to double
atoi() — Convert character string to integer
atol() — Convert character string to long
atoll() — Convert character string to signed long long
__authenticate() — Authenticate the specified user’s credentials
__a2e_l() — Convert characters from ASCII to EBCDIC
__a2e_s() — Convert string from ASCII to EBCDIC
a64l() — Convert base 64 string representation to long integer
basename() — Return the last component of a path name
bcmp() — Compare bytes in memory
bcopy() — Copy bytes in memory
bind() — Bind a name to a socket
bind2addrsel() - Bind with source address selection
brk() — Change space allocation
bsd_signal() — BSD version of signal()
bsearch() — Search arrays
btowc() — Convert single-byte character to wide-character
bzero() — Zero bytes in memory
c16rtomb() — Convert a char16_t character to a multibyte character
c32rtomb() — Convert a char32_t character to a multibyte character
__cabend() — Terminate the process with an abend
cabs(), cabsf(), cabsl() — Calculate the complex absolute value
cacos(), cacosf(), cacosl() — Calculate the complex arc cosine
cacosh(), cacoshf(), cacoshl() — Calculate the complex arc hyperbolic cosine
calloc() — Reserve and initialize storage
carg(), cargf(), cargl() — Calculate the argument
casin(), casinf(), casinl() — Calculate the complex arc sine
casinh(), casinhf(), casinhl() — Calculate the complex arc hyperbolic sine
catan(), catanf(), catanl() — Calculate the complex arc tangent
catanh(), catanhf(), catanhl() — Calculate the complex arc hyperbolic tangent
catclose() — Close a message catalog descriptor
catgets() — Read a program message
catopen() — Open a message catalog
cbrt(), cbrtf(), cbrtl() — Calculate the cube root
cbrtd32(), cbrtd64(), cbrtd128() — Calculate the cube root
cclass() — Return characters in a character class
ccos(), ccosf(), ccosl() — Calculate the complex cosine
ccosh(), ccoshf(), ccoshl() — Calculate the complex hyperbolic cosine
__CcsidType() — Return coded character set ID type
cds() — Compare double and swap
cdump() — Request a main storage dump
ceil(), ceilf(), ceill() — Round up to integral value
ceild32(), ceild64(), ceild128() — Round up to integral value
__certificate() — Register, deregister, or authenticate a digital certificate
cexp(), cexpf(), cexpl() — Calculate the complex exponential
cfgetispeed() — Determine the input baud rate
cfgetospeed() — Determine the output baud rate
cfsetispeed() — Set the input baud rate in the termios
cfsetospeed() — Set the output baud rate in the termios
__chattr(), __chattr64() — Change the attributes of a file or directory
__chattrat(), __chattrat64() — Change the attributes of a file or directory
chaudit() — Change audit flags for a file by path
chdir() — Change the working directory
__check_resource_auth_np() — Determine access to MVS resources
CheckSchEnv() — Check WLM scheduling environment
chmod() — Change the mode of a file or directory
chown() — Change the owner or group of a file or directory
chpriority() — Change the scheduling priority of a process
chroot() — Change root directory
cimag(), cimagf(), cimagl() — Calculate the complex imaginary part
clearenv() — Clear environment variables
clearerr() — Reset error and end of file (EOF)
clock() — Determine processor time
clock_gettime() — Retrieve the time of the specified clock
clog(), clogf(), clogl() — Calculate the complex natural logarithm
clone() — Create a child process
close() — Close a file
closedir() — Close a directory
closelog() — Close the control log
clrmemf() — Clear memory files
__cnvblk() — Convert block
collequiv() — Return a list of equivalent collating elements
collorder() — Return list of collating elements
collrange() — Calculate the range list of collating elements
colltostr() — Return a string for a collating element
compile() — Compile regular expression
confstr() — Get configurable variables
conj(), conjf(), conjl() — Calculate the complex conjugate
connect() — Connect a socket
ConnectExportImport() — WLM connect for export or import use
ConnectServer() — Connect to WLM as a server manager
ConnectWorkMgr() — Connect to WLM as a work manager
__console() — Console communication services
__console2() — Enhanced console communication services
ContinueWorkUnit() — Continue WLM work unit
__convert_id_np() — Convert between DCE UUID and user ID
copysign(), copysignf(), copysignl() — Copy the sign from one floating-point number to another
copysignd32(), copysignd64(), copysignd128() — Copy the sign from one floating-point number to another
cos(), cosf(), cosl() — Calculate cosine
cosd32(), cosd64(), cosd128() — Calculate cosine
cosh(), coshf(), coshl() — Calculate hyperbolic cosine
coshd32(), coshd64(), coshd128() - Calculate hyperbolic cosine
__cospid32(), __cospid64(), __cospid128() — Calculate cosine of pi *x
__cotan(), __cotanf(), __cotanl() — Calculate cotangent
__cpl() — CPL interface service
cpow(), cpowf(), cpowl() — Calculate the complex power
cproj(), cprojf(), cprojl() — Calculate the projection
creal(), crealf(), creall() — Calculate the complex real part
creat() — Create a new file or rewrite an existing one
CreateWorkUnit() — Create WLM work unit
crypt() — String encoding function
cs() — Compare and swap
csid() — Character set ID for multibyte character
csin(), csinf(), csinl() — Calculate the complex sine
csinh(), csinhf(), csinhl() — Calculate the complex hyperbolic sine
__CSNameType() — Return codeset name type
csnap() — Request a condensed dump
__csplist — Retrieve CSP parameters
csqrt(), csqrtf(), csqrtl() — Calculate the complex square root
ctan(), ctanf(), ctanl()— Calculate the complex tangent
ctanh(), ctanhf(), ctanhl() — Calculate the complex hyperbolic tangent
ctdli() — Call to DL/I
ctermid() — Generate path name for controlling terminal
ctest() — Start debug tool
ctime(), ctime64() — Convert time to character string
ctime_r(), ctime64_r() — Convert time value to date and time character string
ctrace() — Request a traceback
cuserid() — Return character login of the user
dbm_clearerr() — Clear database error indicator
dbm_close() — Close a database
dbm_delete() — Delete database record
dbm_error() — Check database error indicator
dbm_fetch() — Get database content
dbm_firstkey() — Get first key in database
dbm_nextkey() — Get next key in database
dbm_open() — Open a database
dbm_store() — Store database record
decabs() — Decimal absolute value
decchk() — Check for valid decimal types
decfix() — Fix up a nonpreferred sign variable
DeleteWorkUnit() — Delete a WLM work unit
difftime(), difftime64() — Compute time difference
dirfd() — Get directory stream file descriptor
dirname() — Report the parent directory of a path name
__discarddata() — Release pages backing virtual storage
DisconnectServer() — Disconnect from WLM server
div() — Calculate quotient and remainder
dlclose() — Close a dlopen() object
dlerror() — Get diagnostic information
dlopen() — Gain access to a dynamic link library
dlsym() — Obtain the address of a symbol from a dlopen() object
dllfree() — Free the supplied dynamic link library
dllload() — Load the dynamic link library and connect it to the application
dllqueryfn() — Obtain a pointer to a dynamic link library function
dllqueryvar() — Obtain a pointer to a dynamic link library variable
dn_comp() — Resolver domain name compression
dn_expand() — Resolver domain name expansion
dn_find() — Resolver domain name find
dn_skipname() — Resolver domain name skipping
dprintf() — Print to a file descriptor
drand48() — Pseudo-random number generator
dup() — Duplicate an open file descriptor
dup2() — Duplicate an open file descriptor to another
dup3() — Duplicate an open file descriptor with flag setting
dynalloc() — Allocate a data set
dynfree() — Deallocate a data set
dyninit() — Initialize __dyn_t structure
ecvt() — Convert double to string
encrypt() — Encoding function
endgrent() — Group database entry functions
endhostent() — Close the host information data set
endnetent() — Close network information data sets
endprotoent() — Work with a protocol entry
endpwent() — User database functions
endservent() — Close network services information data sets
endutxent() — Close the utmpx database
epoll_create(), epoll_create1() — Open an epoll file descriptor
epoll_ctl() — Control interface for an epoll file descriptor
epoll_wait(), epoll_pwait() — Wait for an I/O event on an epoll file descriptor
erand48() — Pseudo-random number generator
erf(), erfc(), erff(), erfl(), erfcf(), erfcl() — Calculate error and complementary error functions
erfd32(), erfd64(), erfd128(), erfcd32(), erfcd64(), erfcd128() - Calculate error and complementary error functions
__err2ad() — Return address of reason code of last failure
__errno2() — Return reason code information
__etoa() — EBCDIC to ISO8859-1 string conversion
__etoa_l() — EBCDIC to ISO8859-1 conversion operation
eventfd() — Create a file descriptor for event notification
exec functions
exit() — End program
_exit() — End a process and bypass the cleanup
_Exit() — Terminate a process
exp(), expf(), expl() — Calculate exponential function
expd32(), expd64(), expd128() — Calculate exponential function
expm1(), expm1f(), expm1l() — Exponential minus one
expm1d32(), expm1d64(), expm1d128() — Exponential minus one
ExportWorkUnit() — WLM export service
exp2(), exp2f(), exp2l() — Calculate the base-2 exponential
exp2d32(), exp2d64(), exp2d128() — Calculate the base-2 exponential
extlink_np() — Create an external symbolic link
ExtractWorkUnit() — Extract enclave service
__e2a_l() — Convert characters from EBCDIC to ASCII
__e2a_s() — Convert string from EBCDIC to ASCII
fabs(), fabsf(), fabsl() — Calculate floating-point absolute value
fabsd32(), fabsd64(), fabsd128() — Calculate floating-point absolute value
faccessat() — Determine accessibility of a file relative to directory file descriptor
fattach() — Attach a STREAMS-based file descriptor to a file in the file system name space
__fbufsize() — Retrieve the buffer size of an open stream
__fchattr(), __fchattr64() — Change the attributes of a file or directory by file descriptor
fchaudit() — Change audit flags for a file by descriptor
fchdir() — Change working directory
fchmod() — Change the mode of a file or directory by descriptor
fchmodat() — Change the mode of a file relative to a directory file descriptor
fchown() — Change the owner or group by file descriptor
fchownat() — Change owner and group of a file relative to directory file descriptor
fclose() — Close file
fcntl() — Control open file descriptors
fcvt() — Convert double to string
fdatasync() — Write changes to direct-access storage
fdclosedir() — Closes directory associated with file descriptor
fdelrec() — Delete a VSAM record
fdetach() — Detach a name from a STREAMS-based file descriptor
fdim(), fdimf(), fdiml() — Calculate the positive difference
fdimd32(), fdimd64(), fdimd128() — Calculate the positive difference
fdopen() — Associate a stream with an open file descriptor
fdopendir() — Opens directory associated with file descriptor
feclearexcept() — Clear the floating-point exceptions
fe_dec_getround() — Get the current rounding mode
fe_dec_setround() — Set the current rounding mode
fegetenv() — Store the current floating-point environment
fegetexceptflag() — Store the states of floating-point status flags
fegetround() — Get the current rounding mode
feholdexcept() — Save the current floating-point environment
feof() — Test end of file (EOF) indicator
feraiseexcept() — Raise the supported floating-point exceptions
ferror() — Test for read and write errors
fesetenv() — Set the floating-point environment
fesetexceptflag() — Set the floating-point status flags
fesetround() — Set the current rounding mode
fetch() — Get a load module
fetchep() — Share writable static
fetestexcept() — Test the floating-point status flags
feupdateenv() — Save the currently raised floating-point exceptions
fflush() — Write buffer to file
ffs() — Find first set bit in an integer
fgetc() — Read a character
fgetpos() — Get file position
fgets() — Read a string from a stream
fgetwc() — Get next wide character
fgetws() — Get a wide-character string
fileno() — Get the file descriptor from an open stream
finite() — Determine the infinity classification of a floating-point number
__flbf() — Determine if a stream is line buffered
fldata() — Retrieve file information
flocate() — Locate a VSAM record
flock()— Apply or remove an advisory lock on an open file
flockfile()— stdio locking
floor(), floorf(), floorl() — Round down to integral value
floord32(), floord64(), floord128() — Round down to integral value
_flushlbf() — Flush all open line-buffered files
fma(), fmaf(), fmal() — Multiply then add
fmad32(), fmad64(), fmad128() — Multiply then add
fmax(), fmaxf(), fmaxl() — Calculate the maximum numeric value
fmaxd32(), fmaxd64(), fmaxd128() — Calculate the maximum numeric value
fmin(), fminf(), fminl() — Calculate the minimum numeric value
fmind32(), fmind64(), fmind128() — Calculate the minimum numeric value
fmod(), fmodf(), fmodl() — Calculate floating-point remainder
fmodd32(), fmodd64(), fmodd128() — Calculate floating-point remainder
fmtmsg() — Display a message in the specified format
fnmatch() — Match file name or path name
fopen() — Open a file
fork() — Create a new process
fortrc() — Return FORTRAN return code
fp_clr_flag() — Reset floating-point exception status flag
fp_raise_xcp() — Raise a floating-point exception
fp_read_flag() — Return the current floating-point exception status
fp_read_rnd() — Determine rounding mode
fp_swap_rnd() — Swap rounding mode
fpathconf() — Determine configurable path name variables
fpclassify() — Classifies an argument value
__fpending() — Retrieve number of bytes pending for write
fprintf(), printf(), sprintf() — Format and write data
__fpurge() — Discard pending data in a stream
fputc() — Write a character
fputs() — Write a string
fputwc() — Output a wide-character
fputws() — Output a wide-character string
fread() — Read items
__freadable() — Determine if a stream is open for reading
__freadahead() — Retrieve number of bytes remaining in input buffer
__freading() — Determine if last operation on stream is a read operation
free() — Free a block of storage
freeaddrinfo() — Free addrinfo storage
freopen() — Redirect an open file
frexp(), frexpf(), frexpl() — Extract mantissa and exponent of the floating-point value
frexpd32(), frexpd64(), frexpd128() — Extract mantissa and exponent of the decimal floating-point value
fscanf(), scanf(), sscanf() — Read and format data
fseek() — Change file position
fseeko() — Change file position
__fseterr() — Set stream in error
__fsetlocking() — Set locking type
fsetpos() — Set file position
fstat(), fstat64() — Get status information about a file
fstatat(), fstatat64() — Get file status information relative to a directory file descriptor
fstatfs() — Get file system statistics
fstatvfs() — Get file system information
fsync() — Write changes to direct-access storage
ftell() — Get current file position
ftello() — Get current file position
ftime(), ftime64() — Set the date and time
ftok() — Generate an interprocess communication (IPC) key
ftruncate() — Truncate a file
ftrylockfile() — stdio locking
ftw(), ftw64() — Traverse a file tree
funlockfile() — stdio unlocking
fupdate() — Update a VSAM record
futimes() — Change file access and modification times
futimesat() — Change timestamps of a file relative to a directory file descriptor
fwide() — Set stream orientation
fwprintf(), swprintf(), wprintf() — Format and write wide characters
__fwritable() — Determine if a stream is open for writing
fwrite() — Write items
__fwriting() — Determine if last operation on stream is a write operation
fwscanf(), swscanf(), wscanf() — Convert formatted wide-character input
gai_strerror() — Address and name information error description
gamma() — Calculate gamma function
gcvt() — Convert double to string
getaddrinfo() — Get address information
getc(), getchar() — Read a character
getc_unlocked(), getchar_unlocked(), putc_unlocked(), putchar_unlocked() — Stdio with explicit client locking
getclientid() — Get the identifier for the calling application
__getclientid() — Get the PID identifier for the calling application
getcontext() — Get user context
__get_cpuid() — Retrieves the system CPUID
getcwd() — Get path name of the working directory
getdate(), getdate64() — Convert user format date and time
getdtablesize() — Get the file descriptor table size
getegid() — Get the effective group ID
getentropy() — Fill a buffer with random bytes
getenv() — Get value of environment variables
__getenv() — Get an environment variable
geteuid() — Get the effective user ID
getgid() — Get the real group ID
getgrent() — Get group database entry
getgrgid() — Access the group database by ID
getgrgid_r() — Get group database entry for a group ID
getgrnam() — Access the group database by name
getgrnam_r() — Search group database for a name
getgroups() — Get a list of supplementary group IDs
getgroupsbyname() — Get supplementary group IDs by user name
gethostbyaddr() — Get a host entry by address
gethostbyname() — Get a host entry by name
gethostent() — Get the next host entry
gethostid() — Get the unique identifier of the current host
gethostname() — Get the name of the host processor
getibmopt() — Get IBM TCP/IP image
getibmsockopt() — Get IBM specific options associated with a socket
__getipc(), __getipc64()— Query interprocess communications
getipv4sourcefilter() — Get source filter
getitimer() — Get value of an interval timer
getline() — Read an entire line from a stream
getlogin() — Get the user login name
getlogin_r() — Get login name
__getlogin1() — Get the user login name
getmccoll() — Get next collating element from string
getmsg(), getpmsg() — Receive next message from a STREAMS file
getnameinfo() — Get name information
getnetbyaddr() — Get a network entry by address
getnetbyname() — Get a network entry by name
getnetent() — Get the next network entry
getopt() — Command option parsing
getopt_long() — Command long option parsing
getpagesize() — Get the current page size
getpass() — Read a string of characters without echo
getpeername() — Get the name of the peer connected to a socket
getpgid() — Get process group ID
getpgrp() — Get the process group ID
getpid() — Get the process ID
getpmsg() — Receive next message from a STREAMS file
getppid() — Get the parent process ID
getpriority() — Get process scheduling priority
getprotobyname() — Get a protocol entry by name
getprotobynumber() — Get a protocol entry by number
getprotoent() — Get the next protocol entry
getpwent() — Get user database entry
getpwent_r() — Get user database entry reentrantly
getpwnam() — Access the user database by user name
getpwnam_r() — Search user database for a name
getpwuid() — Access the user database by user ID
getpwuid_r() — Search user database for a user ID
getrandom() — Obtain a series of random bytes
getrlimit() — Get current or maximum resource consumption
getrusage() — Get information about resource utilization
gets() — Read a string
getservbyname() — Get a server entry by name
getservbyport() — Get a service entry by port
getservent() — Get the next service entry
getsid() — Get process group ID of session leader
getsockname() — Get the name of a socket
getsockopt() — Get the options associated with a socket
getsourcefilter() — Get source filter
getstablesize() — Get the socket table size
getsubopt() — Parse suboption arguments
getsyntx() — Return LC_SYNTAX characters
__get_system_settings() — Retrieves system parameters
gettimeofday(), gettimeofday64() — Get date and time
getuid() — Get the real user ID
__getuserid() — Retrieve the active MVS user ID
getutxent(), getutxent64() — Read next entry in utmpx database
getutxid(), getutxid64() — Search by ID utmpx database
getutxline(), getutxline64() — Search by line utmpx database
getw() — Get a machine word from a stream
getwc() — Get a wide character
getwchar() — Get a wide character
getwd() — Get the current working directory
getwmccoll() — Get next collating element from wide string
getxattr(), lgetxattr(), fgetxattr() — Retrieve an extended attribute value
givesocket() — Make the specified socket available
glob() — Generate path names matching a pattern
globfree() — Free storage allocated by glob()
gmtime(), gmtime64() — Convert time to broken-down UTC time
gmtime_r(), gmtime64_r() — Convert a time value to broken-down UTC time
grantpt() — Grant access to the subsidiary pseudoterminal device
hcreate() — Create hash search tables
hdestroy() — Destroy hash search tables
__heaprpt() — Obtain dynamic heap storage report
hsearch() — Search hash tables
htonl() — Translate address host to network long
htons() — Translate an unsigned short integer into network byte order
hypot(), hypotf(), hypotl() — Calculate the square root of the squares of two arguments
hypotd32(), hypotd64(), hypotd128() — Calculate the square root of the squares of two arguments
ibmsflush() — Flush the application-side datagram queue
iconv() — Code conversion
iconv_close() — Deallocate code conversion descriptor
iconv_open() — Allocate code conversion descriptor
if_freenameindex() — Free the memory allocated by if_nameindex()
if_indextoname() — Map a network interface index to its corresponding name
if_nameindex() — Return all network interface names and indexes
if_nametoindex() — Map a network interface name to its corresponding index
ilogb(), ilogbf(), ilogbl() — Integer unbiased exponent
ilogbd32(), ilogbd64(), ilogbd128() — Integer unbiased exponent
imaxabs() — Absolute value for intmax_t
imaxdiv() — Quotient and remainder for intmax_t
ImportWorkUnit() — WLM import service
index() — Search for character
inet6_is_srcaddr() - Socket address verification
inet6_opt_append() — Add an option with length "len" and alignment "align"
inet6_opt_find() — Search for an option specified by the caller
inet6_opt_finish() — Return the updated total length of extension header
inet6_opt_get_val() — Extract data items in the data portion of the option
inet6_opt_init() — Return the number of bytes for empty extension header
inet6_opt_next() — Parse received option headers returning the next option
inet6_opt_set_val() — Insert data items into the data portion of the option
inet6_rth_add() — Add an IPv6 address to end of the routing header
inet6_rth_getaddr() — Return pointer to the IPv6 address specified
inet6_rth_init() — Initialize an IPv6 routing header buffer
inet6_rth_reverse() — Reverse the order of the addresses
inet6_rth_segments() — Return number of segments contained in header
inet6_rth_space() — Return number of bytes for a routing header
inet_addr() — Translate an Internet address into network byte order
inet_aton() — Convert Internet address format from text to binary
inet_lnaof() — Translate a local network address into host byte order
inet_makeaddr() — Create an Internet host address
inet_netof() — Get the network number from the Internet host sddress
inet_network() — Get the network number from the decimal host address
inet_ntoa() — Get the decimal Internet host address
inet_ntop() — Convert Internet address format from binary to text
inet_pton() — Convert Internet address format from text to binary
initgroups() — Initialize the supplementary group ID list for the process
initstate() — Initialize generator for random()
inotify_add_watch() — Add a watch to an initialized inotify instance
inotify_init(), inotify_init1() — Initialize an inotify instance
inotify_rm_watch() — Remove an existing watch from an inotify instance
insque() — Insert an element into a doubly-linked list
ioctl() — Control device
__ipdbcs() — Retrieve the list of requested DBCS tables to load
__ipDomainName() — Retrieve the resolver supplied domain name
__ipdspx() — Retrieve the data set prefix specified
__iphost() — Retrieve the resolver supplied hostname
__ipmsgc() — Determine the case to use for FTP messages
__ipnode() — Retrieve the resolver supplied node name
__iptcpn() — Retrieve the resolver supplied jobname or user ID
isalnum() to isxdigit() — Test integer value
isalpha() — Test for an alphabetic character
isascii() — Test for 7-bit US-ASCII character
isastream() — Test a file descriptor
isatty() — Test if descriptor represents a terminal
__isBFP() — Determine application floating-point format
isblank() — Test for blank character classification
iscics() — Verify whether CICS is running
iscntrl() — Test for control classification
isdigit() — Test for decimal-digit classification
isfinite() — Determines if its argument has a finite value
isgraph() — Test for graphic classification
isgreater() — Determines if X is greater than Y
isgreaterequal() — Determines if X is greater than or equal to Y
isinf() — Determines if X is ± infinity
isless() — Determines if X is less than Y
islessequal() — Determines if X is less than or equal to Y
islessgreater() — Determines if X is less or greater than Y
islower() — Test for lowercase
ismccollel() — Identify a multicharacter collating element
isnan() — Test for NaN
isnormal() — Determines if X is normal
__isPosixOn() — Test for POSIX runtime option
isprint() — Test for printable character classification
ispunct() — Test for punctuation classification
isspace() — Test for space character classification
isunordered() — Determine if either X or Y is unordered
isupper() — Test for uppercase letter classification
iswalnum() to iswxdigit() — Test wide integer value
iswblank() — Test for blank character classification
iswcntrl() — Test for control classification
iswctype() — Test for character property
iswdigit() — Test for hexadecimal-digit classification
iswgraph() — Test for graphic classification
iswlower() — Test for lowercase
iswprint() — Test for printable character classification
iswpunct() — Test for punctuation classification
iswspace() — Test for space character classification
iswupper() — Test for uppercase letter classification
iswxdigit() — Test for hexadecimal-digit classification
isxdigit() — Test for hexadecimal-digit classification
itoa() — Convert int into a string
JoinWorkUnit() — Join a WLM work unit
jrand48() — Pseudo-random number generator
j0(), j1(), jn() — Bessel functions of the first kind
kill() — Send a signal to a process
killpg() — Send a signal to a process group
labs() — Calculate long absolute value
__lchattr(), __lchattr64() — Change the attributes of a file or directory when they point to a symbolic or external link
lchown() — Change owner and group of a file
lcong48() — Pseudo-random number initializer
ldexp(), ldexpf(), ldexpl() — Multiply by a power of two
ldexpd32(), ldexpd64(), ldexpd128() — Multiply by a power of ten
ldiv() — Compute quotient and remainder of integral division
LeaveWorkUnit() — Leave a WLM work unit
__le_ceegtjs() — Retrieve the value of an exported JCL symbol
__le_ceemict() — Manage the interoperability state of current task
__le_ceeusgd() – Usage data collection service
__le_cib_get() — Get condition information block
__le_condition_token_build() — Build a Language Environment condition token
__le_debug_set_resume_mch() — Move the resume cursor to a predefined location represented by a machine state
__le_msg_add_insert() — Add insert to a Language Environment message
__le_msg_get() — Get a Language Environment message
__le_msg_get_and_write() — Get and output a Language Environment message
__le_msg_write() — Output a Language Environment message to stderr
__le_record _dump() — Record information for the active condition
__le_traceback() — Call chain traceback service
lfind() — Linear search routine
lgamma(), lgammaf(), lgammal() — Log gamma function
lgammad32(), lgammad64(), lgammad128() - Log gamma function
__librel() — Query release level
link() — Create a link to a file
linkat() — Create a link to a file relative to directory file descriptor
listen() — Prepare the server for incoming client requests
listxattr(), llistxattr(), flistxattr() — List extended attribute names
llabs() — Calculate absolute value of long long integer
lldiv() — Compute quotient and remainder of integral division for long long type
llround(), llroundf(), llroundl() — Round to the nearest integer
llroundd32(), llroundd64(), llroundd128() — Round to the nearest integer
lltoa() — Convert long long into a string
localdtconv() — Date and time formatting convention inquiry
localeconv() — Query numeric conventions
localtime(), localtime64() — Convert time and correct for local time
localtime_r(), localtime64_r() — Convert time value to broken-down local time
lockf() — Record locking on files
log(), logf(), logl() — Calculate natural logarithm
logb(), logbf(), logbl() — Unbiased exponent
logbd32(), logbd64(), logbd128() — Unbiased exponent
logd32(), logd64(), logd128() — Calculate natural logarithm
__login(), __login_applid() — Create a new security environment for process
log1p(), log1pf(), log1pl() — Natural log of x+1
log1pd32(), log1pd64(), log1pd128() — Natural log of x+1
log10(), log10f(), log10l() — Calculate base 10 logarithm
log10d32(), log10d64(), log10d128() — Calculate base 10 logarithm
log2(), log2f(), log2l() — Calculate the base-2 logarithm
log2d32(), log2d64(), log2d128() — Calculate the base-2 logarithm
longjmp() — Restore stack environment
_longjmp() — Nonlocal goto
lrand48() — Pseudo-random number generator
lrint(), lrintf(), lrintl() and llrint(), llrintf(), llrintl() — Round the argument to the nearest integer
lrintd32(), lrintd64(), lrintd128() and llrintd32(), llrintd64(), llrintd128() — Round the argument to the nearest integer
lround(), lroundf(), lroundl() — Round a decimal floating-point number to its nearest integer
lroundd32(), lroundd64(), lroundd128() — Round a floating-point number to its nearest integer
lsearch() — Linear search and update
lseek() — Change the offset of a file
lstat(), lstat64() — Get status of file or symbolic link
l64a() — Convert long to base 64 string representation
ltoa() — Convert long into a string
lutimes() — Change file access and modification times
makecontext() — Modify user context
malloc() — Reserve storage block
__malloc24() — Allocate 24-bit storage
__malloc31() — Allocate 31–bit storage
__map_init() — Designate a storage area for mapping blocks
__map_service() — Set memory mapping service
maxcoll() — Return maximum collating element
maxdesc() — Get socket numbers to extend beyond the default range
mblen() — Calculate length of multibyte character
mbrlen() — Calculate length of multibyte character
mbrtoc16() — Convert a multibyte character to a char16_t character
mbrtoc32() — Convert a multibyte character to a char32_t character
mbrtowc() — Convert a multibyte character to a wide character
mbsinit() — Test state object for initial state
mbsrtowcs() — Convert a multibyte string to a wide-character string
mbstowcs() — Convert multibyte characters to wide characters
mbtowc() — Convert multibyte character to wide character
m_create_layout() — Create and initialize a layout object (bidi data)
m_destroy_layout() — Destroy a layout object (bidi data)
memccpy() — Copy bytes in memory
memchr() — Search buffer
memcmp() — Compare bytes
memcpy() — Copy buffer
memmove() — Move buffer
memset() — Set buffer to value
m_getvalues_layout() — Query layout values of a layout object (bidi data)
mkdir() — Make a directory
mkdirat() — Make a directory
mkfifo() — Make a FIFO special file
mkfifoat() — Make a FIFO special file
mknod() — Make a directory or file
mknodat() — Make a directory or file
mkstemp() — Make a unique filename
mktemp() — Make a unique file name
mktime(), mktime64() — Convert local time
__mlockall() — Lock the address space of a process
mmap() — Map pages of memory
modf(), modff(), modfl() — Extract fractional and integral parts of floating-point value
modfd32(), modfd64(), modfd128() — Extract fractional and integral parts of decimal floating-point value
__moservices() - Memory object services
mount() — Make a file system available
__mount() — Make a file system available
mprotect() — Set protection of memory mapping
mrand48() — Pseudo-random number generator
m_setvalues_layout() — Set layout values of a layout object (bidi data)
msgctl(), msgctl64() — Message control operations
msgget() — Get message queue
msgrcv() — Message receive operation
__msgrcv_timed() — Message receive operation with timeout
msgsnd() — Message send operations
msgxrcv(), msgxrcv64() — Extended message receive operation
msync() — Synchronize memory with physical storage
m_transform_layout() — Layout transformation for character strings (bidi data)
munmap() — Unmap pages of memory
__must_stay_clean() — Enable or query clean
m_wtransform_layout() — Layout transformation for wide-character strings (bidi data)
nan(), nanf(), nanl() — Return quiet NaN
nand32(), nand64(), nand128() — Return quiet NaN
nanosleep() — High-resolution sleep
nearbyint(), nearbyintf(), nearbyintl() — Round the argument to the nearest integer
nearbyintd32(), nearbyintd64(), nearbyintd128() — Round the argument to the nearest integer
nextafter(), nextafterf(), nextafterl() — Next representable double float
nextafterd32(), nextafterd64(), and nextafterd128() — Next representable decimal floating-point value
nexttoward(), nexttowardf(), nexttowardl() — Calculate the next representable value
nexttowardd32(), nexttowardd64(), nexttowardd128() — Calculate the next representable value
nftw(), nftw64() — Traverse a file tree
nice() — Change priority of a process
nlist() — Get entries from a name list
nl_langinfo() — Retrieve locale information
nrand48() — Pseudo-random number generator
ntohl() — Translate a long integer into host byte order
ntohs() — Translate an unsigned short integer into host byte order
open() — Open a file
openat() — Open a file relative to a directory file descriptor
openat2() — Open a file with more extensions
opendir() — Open a directory
__opendir2() — Open a directory
openlog() — Open the system control log
__open_stat(), __open_stat64() — Open a file and get file status information
__osname() — Get true operating system name
__passwd(), __passwd_applid() — Verify or change user password
pathconf() — Determine configurable path name variables
pause() — Suspend a process pending a signal
pclose() — Close a pipe stream to or from a process
perror() — Print error message
__pid_affinity() — Add or delete process affinity
pipe() — Create an unnamed pipe
pipe2() — Create a pipe
pivot_root() — Change root mount
__poe() — Port of entry information
poll() — Monitor activity on file descriptors and message queues
popen() — Initiate a pipe stream to or from a process
posix_memalign() — Reserve aligned storage block
posix_openpt() — Open a pseudo-terminal device
pow(), powf(), powl() — Raise to power
powd32(), powd64(), powd128() — Raise to power
__pow_i() — Raise to a power (R**I)
__pow_ii() — Raise to a power (I**I)
prctl() — Operate on a process or thread
prlimit() — Get or set the hard and soft resource limits of a specified process
pread() — Read from a file or socket without file pointer change
printf() — Format and write data
pselect() - Monitor activity on files or sockets and message queues
psignal() — Print signal description
pthread_atfork() - Register fork handlers
pthread_attr_destroy() — Destroy the thread attributes object
pthread_attr_getdetachstate() — Get the detach state attribute
pthread_attr_getguardsize() - Get guardsize attribute
pthread_attr_getschedparam() - Get scheduling parameter attributes
pthread_attr_getstack() - Get stack attribute
pthread_attr_getstackaddr() - Get stackaddr attribute
pthread_attr_getstacksize() — Get the thread attribute stacksize object
pthread_attr_getsynctype_np() — Get thread sync type
pthread_attr_getweight_np() — Get weight of thread attribute object
pthread_attr_init() — Initialize a thread attribute object
pthread_attr_setdetachstate() — Set the detach state attribute
pthread_attr_setguardsize() - Set guardsize attribute
pthread_attr_setschedparam() - Set scheduling parameter attributes
pthread_attr_setstack() - Set stack attribute
pthread_attr_setstackaddr() - Set stackaddr attribute
pthread_attr_setstacksize() — Set the stacksize attribute object
pthread_attr_setsynctype_np() — Set thread sync type
pthread_attr_setweight_np() — Set weight of thread attribute object
pthread_cancel() — Cancel a thread
pthread_cleanup_pop() — Remove a cleanup handler
pthread_cleanup_push() — Establish a cleanup handler
pthread_cond_broadcast() — Broadcast a condition
pthread_cond_destroy() — Destroy the condition variable object
pthread_cond_init() — Initialize a condition variable
pthread_cond_signal() — Signal a condition
pthread_cond_timedwait(), pthread_cond_timedwait64() — Wait on a condition variable
pthread_cond_wait() — Wait on a condition variable
pthread_condattr_destroy() — Destroy condition variable attribute object
pthread_condattr_getkind_np() — Get kind attribute from a condition variable attribute object
pthread_condattr_getpshared() — Get the process-shared condition variable attribute
pthread_condattr_init() — Initialize a condition attribute object
pthread_condattr_setclock() — Sets the clock selection condition variable attribute
pthread_condattr_setkind_np() — Set kind attribute from a condition variable attribute object
pthread_condattr_setpshared() — Set the process-shared condition variable attribute
pthread_create() — Create a thread
pthread_detach() — Detach a thread
pthread_equal() — Compare thread IDs
pthread_exit() — Exit a thread
pthread_getconcurrency() — Get the level of concurrency
pthread_getspecific() — Get the thread-specific value for a key
pthread_getspecific_d8_np() — Get the thread-specific value for a key
pthread_join() — Wait for a thread to end
pthread_join_d4_np() — Wait for a thread to end
pthread_key_create() — Create thread-specific data key
pthread_key_delete() — Delete thread-specific data key
pthread_kill() — Send a signal to a thread
pthread_mutex_destroy() — Delete a mutex object
pthread_mutex_init() — Initialize a mutex object
pthread_mutex_lock() — Wait for a lock on a mutex object
pthread_mutex_trylock() — Attempt to lock a mutex object
pthread_mutex_unlock() — Unlock a mutex object
pthread_mutexattr_destroy() — Destroy a mutex attribute object
pthread_mutexattr_getkind_np() — Get kind from a mutex attribute object
pthread_mutexattr_getpshared() — Get the process-shared mutex attribute
pthread_mutexattr_gettype() — Get type of mutex attribute object
pthread_mutexattr_init() — Initialize a mutex attribute object
pthread_mutexattr_setkind_np() — Set kind for a mutex attribute object
pthread_mutexattr_setpshared() — Set the process-shared mutex attribute
pthread_mutexattr_settype() — Set type of mutex attribute object
pthread_once() — Invoke a function once
pthread_rwlock_destroy() — Destroy a read or write lock object
pthread_rwlock_init() — Initialize a read or write lock object
pthread_rwlock_rdlock() — Wait for a lock on a read or write lock object
pthread_rwlock_tryrdlock() — Attempt to lock a read or write lock object for reading
pthread_rwlock_trywrlock() — Attempt to lock a read or write lock object for writing
pthread_rwlock_unlock() — Unlock a read or write lock object
pthread_rwlock_wrlock() — Wait for a lock on a read or write lock object for writing
pthread_rwlockattr_destroy() — Destroy a read or write lock attribute object
pthread_rwlockattr_getpshared() — Get the processed-shared read or write lock attribute
pthread_rwlockattr_init() — Initialize a read or write lock attribute object
pthread_rwlockattr_setpshared() — Set the process-shared read or write lock attribute
pthread_security_np(), pthread_security_applid_np() — Create or delete thread-level security
pthread_self() — Get the caller
pthread_setcancelstate() — Set a thread cancelability state format
pthread_setcanceltype() — Set a thread cancelability type format
pthread_setconcurrency() — Set the level of concurrency
pthread_setintr() — Set a thread cancelability state
pthread_setintrtype() — Set a thread cancelability type
pthread_set_limit_np() — Set task and thread limits
pthread_setspecific() — Set the thread-specific value for a key
pthread_sigmask() — Examine or change a thread blocked signals format
pthread_tag_np() — Set and query thread tag data
pthread_testcancel() — Establish a cancelation point
pthread_testintr() — Establish a cancelability point
pthread_yield() — Release the processor to other threads
ptsname() — Get name of the subsidiary pseudoterminal device
putc(), putchar() — Write a character
putenv() — Change or add an environment variable
putmsg(), putpmsg() — Send a message on a STREAM
puts() — Write a string
pututxline(), pututxline64() — Write entry to utmpx database
putw() — Put a machine word on a stream
putwc() — Output a wide character
putwchar() — Output a wide character to standard output
pwrite() — Write data on a file or socket without file pointer change
qsort() — Sort array
quantexpd32(), quantexpd64(), quantexpd128() - Compute the quantum exponent
quantized32(), quantized64(), quantized128() — Set the exponent of X to the exponent of Y
QueryMetrics() — Query WLM system information
QuerySchEnv() — Query WLM scheduling environment
QueryWorkUnitClassification() — WLM query enclave classification service
raise() — Raise signal
rand() — Generate random number
rand_r() — Pseudo-random number generator
random() — A better random-number generator
read() — Read from a file or socket
readdir() — Read an entry from a directory
__readdir2(), __readdir2_64() — Read directory entry and get file information
readdir_r() — Read an entry from a directory
readlink() — Read the value of a symbolic link
readlinkat() — Read value of a symbolic link relative to a directory file descriptor
readv() — Read data on a file or socket and store in a set of buffers
realloc() — Change reserved storage block size
realpath() — Resolve path name
re_comp() — Compile regular expression
recv() — Receive data on a socket
recvfrom() — Receive messages on a socket
recvmsg() — Receive messages on a socket and store in array of message headers
re_exec() — Match regular expression
regcmp() — Compile regular expression
regcomp() — Compile regular expression
regerror() — Return error message
regex() — Execute compiled regular expression
regexec() — Execute compiled regular expression
regfree() — Free memory for regular expression
release() — Delete a load module
remainder(), remainderf(), remainderl() — Computes the remainder x REM y
remainderd32(), remainderd64(), remainderd128() - Computes the remainder x REM y
remove() — Delete file
removexattr(), lremovexattr(), fremovexattr() — Remove an extended attribute
remque() — Remove an element from a double linked list
remquo(), remquof(), remquol() — Computes the remainder.
__remquod32(), __remquod64(), __remquod128() — Computes the remainder.
rename() — Rename file
renameat() — Change the name or location of a file
renameat2() — Change the name or location of a file
res_init() — Domain name resolver initialization
res_mkquery() — Make resolver query for domain name servers
res_query() — Resolver query for domain name servers
res_querydomain() — Build domain name and resolver query
res_search() — Resolver query for domain name servers
res_send() — Send resolver query for domain name servers
__reset_exception_handler() — Unregister an exception handler routine
rewind() — Set file position to beginning of file
rewinddir() — Reposition a directory stream to the beginning
rexec() — Execute commands one at a time on a remote host
rexec_af() — Execute commands one at a time on a remote host
rindex() — Search for character
rint(), rintf(), rintl() — Round to nearest integral value
rintd32(), rintd64(), rintd128() — Round to nearest integral value
rmdir() — Remove a directory
round(), roundf(), roundl() — Round to the nearest integer
roundd32(), roundd64(), roundd128() — Round to the nearest integer
rpmatch() — Test for a yes or no response match
samequantumd32(), samequantumd64(), samequantumd128() — Determine if exponents X and Y are the same
sbrk() — Change space allocation
scalb() — Load exponent
scalbn(), scalbnf(), scalbnl(), scalbln(), scalblnf(), scalblnl() — Load exponent functions
scalbnd32(), scalbnd64(), scalbnd128() and scalblnd32(), scalblnd64(), scalblnd128() — Load exponent functions
scanf() — Read and format data
sched_yield() — Release the processor to other threads
seed48() — Pseudo-random number initializer
seekdir() — Set position of directory stream
select(), pselect() — Monitor activity on files or sockets and message queues
selectex() — Monitor activity on files or sockets and message queues
semctl(), semctl64() — Semaphore control operations
semget() — Get a set of semaphores
semop() — Semaphore operations
__semop_timed() — Semaphore operations with timeout
send() — Send data on a socket
send_file() — Send file data over a socket
sendmsg() — Send messages on a socket
sendto() — Send data on a socket
__server_classify() — Set classify area field
__server_classify_create() — Create a classify area
__server_classify_destroy() — Delete a classify area
__server_classify_reset() — Reset a classify area to an initial state
__server_init() — Initialize server
__server_pwu() — Process server work unit
__server_threads_query() — Query the number of threads
setbuf() — Control buffering
setcontext() — Restore user context
setegid() — Set the effective group ID
setenv() — Add, delete, and change environment variables
seteuid() — Set the effective user ID
__set_exception_handler() — Register an exception handler routine
setgid() — Set the group ID
setgrent() — Reset group database to first entry
setgroups() — Set the supplementary group ID list for the process
sethostent() — Open the host information data set
sethostname() — Set the name of the host processor
setibmopt() — Set IBM TCP/IP image
setibmsockopt() — Set IBM specific options associated with a socket
setipv4sourcefilter() — Set source filter
setitimer() — Set value of an interval timer
setjmp() — Preserve stack environment
_setjmp() — Set jump point for a nonlocal goto
setkey() — Set encoding key
setlocale() — Set locale
setlogmask() — Set the mask for the control log
setnetent() — Open the network information data set
set_new_handler() — Register a function for new_handler()
setns() — Allow for a thread to join a descendant namespace
setpeer() — Preset the socket peer address
setpgid() — Set process group ID for job control
setpgrp() — Set process group ID
setpriority() — Set process scheduling priority
setprotoent() — Open the protocol information data set
setpwent() — Reset user database search
setregid() — Set real and effective group IDs
setreuid() — Set real and effective user IDs
setrlimit() — Control maximum resource consumption
setservent() — Open the network services information data set
setsid() — Create session, set process group ID
setsockopt() — Set options associated with a socket
setsourcefilter() — Set source filter
setstate() — Change generator for random()
set_terminate() — Register a function for terminate()
_SET_THLIIPADDR() — Set the client's IP address
setuid() — Set the effective user ID
set_unexpected() — Register a function for unexpected()
setutxent() — Reset to start of utmpx database
setvbuf() — Control buffering
setxattr(), lsetxattr(), fsetxattr() — Set an extended attribute value
shmat() — Shared memory attach operation
shmctl(), shmctl64() — Shared memory control operations
shmdt() — Shared memory detach operation
shmget() — Get a shared memory segment
shutdown() — Shut down all or part of a duplex connection
__shutdown_registration() — Register OMVS shutdown options
sigaction() — Examine or change a signal action
__sigactionset() — Examine or change signal actions
sigaddset() — Add a signal to the signal mask
sigaltstack() — Set or get signal alternate stack context
sigdelset() — Delete a signal from the signal mask
sigemptyset() — Initialize a signal mask to exclude all signals
sigfillset() — Initialize a signal mask to include all signals
sighold() — Add a signal to a thread
sigignore() — Set disposition to ignore a signal
siginterrupt() — Allow signals to interrupt functions
sigismember() — Test if a signal is in a signal mask
siglongjmp() — Restore the stack environment and signal mask
signal() — Handle interrupts
signbit() — Determines whether the sign of its argument is negative
__signgam() — Return signgam reference
sigpause() — Unblock a signal and wait for a signal
sigpending() — Examine pending signals
sigprocmask() — Examine or change a thread
sigqueue() — Queue a signal to a process
sigrelse() — Remove a signal from a thread
sigset() — Change a signal action or a thread
sigsetjmp() — Save stack environment and signal mask
sigstack() — Set or get signal stack context
sigsuspend() — Change mask and suspend the thread
sigtimedwait() — Wait for queued signals
sigwait() — Wait for an asynchronous signal
sigwaitinfo() — Wait for queued signals
sin(), sinf(), sinl() — Calculate sine
sind32(), sind64(), sind128() — Calculate sine
sinh(), sinhf(), sinhl() — Calculate hyperbolic sine
sinhd32(), sinhd64(), sinhd128() - Calculate hyperbolic sine
__sinpid32(), __sinpid64(), __sinpid128() — Calculate sine of pi * x
sleep() — Suspend execution of a thread
__smf_record() — Record an SMF record
__smf_record2() — Record an SMF record with exit control
snprintf() — Format and write data
sockatmark() — Determine whether a socket is at the out-of-band mark
sock_debug() — Provide syscall tracing facility
sock_debug_bulk_perf0() — Produce a report when a socket is configured
sock_do_bulkmode() — Use bulk mode for messages read by a socket
sock_do_teststor() — Check for attempt to access storage outside
socket() — Create a socket
socketpair() — Create a pair of sockets
spawn(), spawnp() — Spawn a new process
__spawn2(), __spawnp2() — Spawn a new process using enhanced inheritance structure
sprintf() — Format and write data to buffer
sqrt(), sqrtf(), sqrtl() — Calculate square root
sqrtd32(), sqrtd64(), sqrtd128() — Calculate square root
srand() — Set seed for rand() function
srandom() — Use seed to initialize generator for random()
srand48() — Pseudo-random number initializer
sscanf() — Read and format data from buffer
stat(), stat64() — Get file information
statfs() — Get file system statistics
statvfs() — Get file system information
step() — Pattern match with regular expression
strcasecmp() — Case-insensitive string comparison
strcat() — Concatenate strings
strchr() — Search for character
strchrnul() — Find first occurrence of character in string
strcmp() — Compare strings
strcoll() — Compare strings
strcpy() — Copy string
strcspn() — Compare strings
strdup() — Duplicate a string
strerror() — Get pointer to runtime error message
strerror_r() — Get copy of runtime error message
strfmon() — Convert monetary value to string
strftime() — Convert to formatted time
strlen() — Determine string length
strncasecmp() — Case-insensitive string comparison
strncat() — Concatenate strings
strncmp() — Compare strings
strncpy() — Copy string
strpbrk() — Find characters in string
strptime() — Date and time conversion
strrchr() — Find last occurrence of character in string
strspn() — Search string
strstr() — Locate substring
strtocoll() — Return collating element for string
strtod() — Convert character string to double
strtod32(), strtod64(), strtod128() — Convert character string to decimal floating point
strtof() — Convert character string to float
strtoimax() — Convert character string to intmax_t integer type
strtok() — Tokenize string
strtok_r() — Split string into tokens
strtol() — Convert character string to long
strtold() — Convert character string to long double
strtoll() — Convert string to signed long long
strtoul() — Convert string to unsigned integer
strtoull() — Convert string to unsigned long long
strtoumax() — Convert character string to uintmax_t integer type
strxfrm() — Transform string
__superkill() — Sends "super" SIGKILL to terminate target process
svc99() — Access supervisor call
swab() — Copy and swap bytes
swapcontext() — Save and restore user context
swprintf() — Format and write wide characters
swscanf() — Read a wide-character string
symlink() — Create a symbolic link to a path name
symlinkat() — Create a symbolic link to a path name
sync() — Schedule file system updates
syncfs() — Schedule specific file system updates
syscall() — Invokes indirect system calls
sysconf() — Determine system configuration options
syslog() — Send a message to the control log
system() — Execute a command
t_accept() — Accept a connect request
takesocket() — Acquire a socket from another program
t_alloc() — Allocate a library structure
tan(), tanf(), tanl() — Calculate tangent
tand32(), tand64(), tand128() - Calculate tangent
tanh(), tanhf(), tanhl() — Calculate hyperbolic tangent
tanhd32(), tanhd64(), tanhd128() - Calculate hyperbolic tangent
t_bind() — Bind an address to a transport endpoint
tcdrain() — Wait until output has been transmitted
tcflow() — Suspend or resume data flow on a terminal
tcflush() — Flush input or output on a terminal
tcgetattr() — Get the attributes for a terminal
__tcgetcp() — Get terminal code page names
tcgetpgrp() — Get the foreground process group ID
tcgetsid() — Get process group ID for session leader for controlling terminal
t_close() — Close a transport endpoint
t_connect() — Establish a connection with another transport user
tcperror() — Print the error messages of a socket function
tcsendbreak() — Send a break condition to a terminal
tcsetattr() — Set the attributes for a terminal
__tcsetcp() — Set terminal code page names
tcsetpgrp() — Set the foreground process group ID
__tcsettables() — Set terminal code page names and conversion tables
tdelete() — Binary tree delete
telldir() — Current location of directory stream
tempnam() — Generate a temporary file name
terminate() — Terminate after failures in C++ error handling
t_error() — Produce error message
tfind() — Binary tree find node
t_free() — Free a library structure
tgamma(), tgammaf(), tgammal() — Calculate gamma function
tgammad32(), tgammad64(), tgammad128() - Calculate gamma function
t_getinfo() — Get protocol-specific service information
t_getprotaddr() — Get the protocol addresses
t_getstate() — Get the current state
time(),time64() — Determine current UTC time
times() — Get process and child process times
tinit() — Attach and initialize MTF subtasks
t_listen() — Listen for a connect indication
t_look() — Look at the current event on a transport endpoint
tmpfile() — Create temporary file
tmpnam() — Produce temporary file name
toascii() — Translate integer to a 7-bit ASCII character
__toCcsid() — Convert codeset name to coded character set ID
__toCSName() — Convert coded character set ID to codeset name
tolower(), toupper() — Convert character case
_tolower() — Translate uppercase characters to lowercase
t_open() — Establish a transport endpoint
t_optmgmt() — Manage options for a transport endpoint
_toupper() — Translate lowercase characters to uppercase
towlower(), towupper() — Convert wide character case
towctrans() — Transliterate wide character transliteration
t_rcv() — Receive data or expedited data sent over a connection
t_rcvconnect() — Receive the confirmation from a connect request
t_rcvdis() — Retrieve information from disconnect
t_rcvrel() — Acknowledge receipt of an orderly release indication
t_rcvudata() — Receive a data unit
t_rcvuderr() — Receive a unit data error indication
trunc(), truncf(), truncl() — Truncate an integer value
truncd32(), truncd64(), truncd128() — Truncate an integer value
truncate() — Truncate a file to a specified length
tsched() — Schedule MTF subtask
tsearch() — Binary tree search
t_snd() — Send data or expedited data over a connection
t_snddis() — Send user-initiated disconnect request
t_sndrel() — Initiate an orderly release
t_sndudata() — Send a data unit
t_strerror() — Produce an error message string
t_sync() — Synchronize transport library
tsyncro() — Wait for MTF subtask termination
tterm() — Terminate MTF subtasks
ttyname() — Get the name of a terminal
ttyname_r() — Find path name of a terminal
ttyslot() — Find the slot in the utmpx file of the current user
t_unbind() — Disable a transport endpoint
twalk() — Binary tree walk
tzset() — Set the time zone
ualarm() — Set the interval timer
__ucreate() — Create a heap using user-provided storage
__ufree() — Return storage to a user-created heap
__uheapreport() — Produce a storage report for a user-created heap
ulimit() — Get or set process file size limits
ulltoa() — Convert unsigned long long into a string
ultoa() — Convert unsigned long into a string
__umalloc() — Allocate storage from a user-created heap
umask() — Set and retrieve file creation mask
umount() — Remove a virtual file system
umount2() — Unmount file system
uname() — Display current operating system name
uncaught_exception() — Determine if an exception is being processed
UnDoExportWorkUnit() — WLM undo export service
UnDoImportWorkUnit() — WLM undo import service
unexpected() — Handle exception not listed in exception specification
ungetc() — Push character onto input stream
ungetwc() — Push a wide character onto a stream
unlink() — Remove a directory entry
unlinkat() — Remove a directory or directory entry
unlockpt() — Unlock a pseudoterminal manager and subsidiary pair
unsetenv() — Delete an environment variable
unshare() — Isolate a process from one or more of its namespaces
usleep() — Suspend execution for an interval
utime(), utime64() — Set file access and modification times
utimensat() — Change file timestamps with nanosecond precision
utimes(), utimes64() — Set file access and modification times
__utmpxname() — Change the utmpx database name
utoa() — Convert unsigned int into a string
va_arg(), va_copy(), va_end(), va_start() — Access function arguments
valloc() — Page-aligned memory allocator
vfork() — Create a new process
vfprintf() — Format and print data to stream
vfscanf(), vscanf(), vsscanf() — Format input of a STDARG argument list
vfwprintf(), vswprintf(), vwprintf() — Format and write wide characters of a STDARG argument list
vfwscanf(), vwscanf(), vswscanf() — Wide-character formatted input of a STDARG argument list
vprintf() — Format and print data to stdout
vsnprintf() — Format and print data to fixed length buffer
vsprintf() — Format and print data to buffer
vswprintf() — Format and write wide characters of a stdarg argument list
vwprintf() — Format and write wide characters of a stdarg argument list
wait() — Wait for a child process to end
waitid() — Wait for child process to change state
waitpid() — Wait for a specific child process to end
wait3(), wait4() — Wait for child process to change state
wcrtomb() — Convert a wide character to a multibyte character
wcscat() — Append to wide-character string
wcschr() — Search for wide-character substring
wcscmp() — Compare wide-character strings
wcscoll() — Language collation string comparison
wcscpy() — Copy wide-character string
wcscspn() — Find offset of first wide-character match
wcsftime() — Format date and time
wcsid() — Character set ID for wide character
wcslen() — Calculate length of wide-character string
wcsncat() — Append to wide-character string
wcsncmp() — Compare wide-character strings
wcsncpy() — Copy wide-character string
wcspbrk() — Locate first wide characters in string
wcsrchr() — Locate last wide character in string
wcsrtombs() — Convert wide-character string to multibyte string
wcsspn() — Search for wide characters in a string
wcsstr() — Locate a wide character sequence
wcstod() — Convert wide-character string to a double floating-point
wcstod32(), wcstod64(), wcstod128() — Convert wide-character string to decimal floating point
wcstof() — Convert a wide-character string to float
wcstoimax() — Convert a wide-character string to a intmax_t
wcstok() — Break a wide-character string into tokens
wcstol() — Convert a wide-character string to a long integer
wcstold() — Convert a wide-character string to long double
wcstoll() — Convert a wide-character string to a long long integer
wcstombs() — Convert wide-character string to multibyte character string
wcstoul() — Convert a wide-character string to an unsigned long integer
wcstoull() — Convert a wide-character string to an unsigned long long integer
wcstoumax() — Convert a wide-character string to a intmax_t
wcswcs() — Locate wide-character substring in wide-character string
wcswidth() — Determine the display width of a wide-character string
wcsxfrm() — Transform a wide-character string
wctob() — Convert wide character to byte
wctomb() — Convert wide character to multibyte character
wctrans(), towctrans() — Transliterate wide character
wctype() — Obtain handle for character property classification
wcwidth() — Determine the display width of a wide character
w_getmntent() — Get information on mounted file systems
w_getpsent(), w_getpsent64() — Get process data
w_ioctl(), __w_pioctl() — Control of devices
wmemchr() — Locate wide character
wmemcmp() — Compare wide character
wmemcpy() — Copy wide character
wmemmove() — Move wide character
wmemset() — Set wide character
wordexp() — Perform shell word expansions
wordfree() — Free shell word expansion memory
__w_pioctl() — Control of devices
wprintf() — Format and write wide characters
write() — Write data on a file or socket
__writedown() — Query or change the setting of the write-down privilege of an ACEE.
writev() — Write data on a file or socket from an array
__wsinit() — Reinitialize writable static
w_statfs() — Get the file system status
w_statvfs() — Get the file system status
y0(), y1(), yn() — Bessel functions of the second kind
Library functions for the system programming C (SPC) facilities