• • Abstract for XL C/C++ Runtime Library Reference
  • New and updated information in z/OS Version 2 Release 1
• About IBM z/OS XL C/C++
  • AMODE 64 considerations
• Header files
  • Feature test macros
  • aio.h
  • arpa/inet.h
  • arpa/nameser.h
  • assert.h
  • cassert
  • _Ccsid.h
  • cctype
  • ceeedcct.h
  • cerrno
  • cfloat
  • cics.h
  • ciso646
  • climits
  • clocale
  • cmath
  • collate.h
  • complex.h
  • cpio.h
  • csetjmp
  • csignal
  • csp.h
  • cstdarg
  • cstddef
  • cstdio
  • cstdlib
  • cstring
  • ctest.h
  • ctime
  • ctype.h
  • cwchar
  • cwctype
  • decimal.h
  • dirent.h
  • dlfcn.h
  • dll.h
  • dynit.h
  • env.h
  • errno.h
  • exception
  • fcntl.h
  • features.h
  • fenv.h
  • float.h
  • fmtmsg.h
  • fnmatch.h
  • fpxcp.h
  • __ftp.h
  • ftw.h
  • glob.h
  • grp.h
  • iconv.h
  • _Ieee754.h
  • ims.h
  • inttypes.h
  • iso646.h
  • langinfo.h
  • lc_core.h
  • lc_sys.h
  • __le_api.h
  • leawi.h
  • libgen.h
  • limits.h
  • localdef.h
  • locale.h
  • math.h
  • memory.h
  • monetary.h
  • msgcat.h
  • mtf.h
  • _Nascii.h
  • ndbm.h
  • netdb.h
  • net/if.h
  • net/rtrouteh.h
  • netinet/icmp6.h
  • netinet/in.h
  • netinet/ip6.h
  • netinet/tcp.h
  • new
  • new.h
  • nlist.h
  • nl_types.h
  • poll.h
  • pthread.h
  • pwd.h
  • re_comp.h
  • regex.h
  • regexp.h
  • resolv.h
  • rexec.h
  • sched.h
  • search.h
  • setjmp.h
  • signal.h
  • spawn.h
  • spc.h
  • stdalign.h
  • stdarg.h
  • stdbool.h
  • stddef.h
  • stdefs.h
  • stdint.h
  • stdio.h
  • stdio_ext.h
  • stdlib.h
  • string.h
  • strings.h
  • stropts.h
  • syslog.h
  • sys/acl.h
  • sys/__cpl.h
  • sys/file.h
  • sys/__getipc.h
  • sys/ioctl.h
  • sys/ipc.h
  • sys/layout.h
  • sys/mman.h
  • sys/__messag.h
  • sys/mntent.h
  • sys/modes.h
  • sys/msg.h
  • sys/ps.h
  • sys/resource.h
  • sys/select.h
  • sys/sem.h
  • sys/server.h
  • sys/shm.h
  • sys/socket.h
  • sys/stat.h
  • sys/statfs.h
  • sys/statvfs.h
  • sys/time.h
  • sys/timeb.h
  • sys/times.h
  • sys/ttydev.h
  • sys/types.h
  • sys/uio.h
  • sys/un.h
  • sys/__ussos.h
  • sys/utsname.h
  • sys/wait.h
  • sys/__wlm.h
  • tar.h
  • terminat.h
  • termios.h
  • tgmath.h
  • time.h
  • typeinfo
  • typeinfo.h
  • uchar.h
  • ucontext.h
  • uheap.h
  • ulimit.h
  • unexpect.h
  • unistd.h
  • utime.h
  • utmpx.h
  • varargs.h
  • variant.h
  • wchar.h
  • wcstr.h
  • wctype.h
  • wordexp.h
  • xti.h
• Library functions
  • 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
  • abort() — Stop a program
  • abs(), absf(), absl() — Calculate integer absolute value
  • accept() — 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
  • 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
  • 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
  • __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() — 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
  • clog(), clogf(), clogl() — Calculate the complex natural logarithm
  • 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
  • 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
  • drand48() — Pseudo-random number generator
  • dup() — Duplicate an open file descriptor
  • dup2() — Duplicate an open file descriptor to another
  • 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
  • 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
  • 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
  • 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() — 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
  • fchown() — Change the owner or group by file descriptor
  • fclose() — Close file
  • fcntl() — Control open file descriptors
  • fcvt() — Convert double to string
  • 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
  • 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
  • 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() — Get status information about a file
  • fstatvfs() — Get file system information
  • fsync() — Write changes to direct-access storage
  • ftell() — Get current file position
  • ftello() — Get current file position
  • ftime() — Set the date and time
  • ftok() — Generate an interprocess communication (IPC) key
  • ftruncate() — Truncate a file
  • ftrylockfile() — stdio locking
  • ftw() — Traverse a file tree
  • funlockfile() — stdio unlocking
  • fupdate() — Update a VSAM record
  • 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
  • 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() — Query interprocess communications
  • getipv4sourcefilter() — Get source filter
  • getitimer() — Get value of an interval timer
  • 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
  • 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
  • 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
  • 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() — Read next entry in utmpx database
  • getutxid() — Search by ID utmpx database
  • getutxline() — 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
  • 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 slave 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_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()
  • 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() — 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_cib_get() — Get condition information block
  • __le_condition_token_build() — Build a Language Environment condition token
  • __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_debug_set_resume_mch() — Move the resume cursor to a predefined location represented by a machine state
  • __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
  • listen() — Prepare the server for incoming client requests
  • 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() — Get status of file or symbolic link
  • l64a() — Convert long to base 64 string representation
  • ltoa() — Convert long into a string
  • 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
  • mkfifo() — Make a FIFO special file
  • mknod() — 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() — Message control operations
  • msgget() — Get message queue
  • msgrcv() — Message receive operation
  • __msgrcv_timed() — Message receive operation with timeout
  • msgsnd() — Message send operations
  • msgxrcv() — 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
  • 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(), nextafterd128() — Next representable decimal floating-point value
  • nexttoward(), nexttowardf(), nexttowardl() — Calculate the next representable value
  • nexttowardd32(), nexttowardd64(), nexttowardd128() — Calculate the next representable value
  • nftw() — 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
  • opendir() — Open a directory
  • __opendir2() — Open a directory
  • openlog() — Open the system control log
  • __open_stat() — 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
  • __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_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)
  • 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
  • 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() — 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_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 slave 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() — 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() — Read directory entry and get file information
  • readdir_r() — Read an entry from a directory
  • readlink() — Read the value of a symbolic link
  • 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 an 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
  • remque() — Remove an element from a double linked list
  • remquo(), remquof(), remquol() — Computes the remainder.
  • __remquod32(), __remquod64(), __remquod128() — Computes the remainder.
  • rename() — Rename 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() — 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
  • 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 set_new_handler()
  • 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
  • shmat() — Shared memory attach operation
  • shmctl() — 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() — Get file information
  • statvfs() — Get file system information
  • step() — Pattern match with regular expression
  • strcasecmp() — Case-insensitive string comparison
  • strcat() — Concatenate strings
  • strchr() — Search for character
  • 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
  • sync() — Schedule file system updates
  • 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
  • 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
  • unlockpt() — Unlock a pseudoterminal master and slave pair
  • unsetenv() — Delete an environment variable
  • usleep() — Suspend execution for an interval
  • utime() — Set file access and modification times
  • utimes() — 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() — 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() — 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
• XL C/C++ Macros
• Function support table
  • Preinitialized environments for authorized programs
  • Enhanced ASCII support
  • Library function support