Requirements and Specifications of LSB Core 3.1 Interfaces: By Name
- Function Name - click on the link (if present) to see particular function specification.
- Group - function group name (total 169 groups for LSB Core 3.1).
- Requirements - the number of atomic requirements extracted for particular function (the link points to a detailed requirements list); dashes - if the function requirements have not been analyzed yet.
- Library - library name in which the function is implemented.
- LSB Section - the number and section name in LSB where the function is defined.
- Standard - reference to a base standard where the function requirements are defined. See abbreviations.
| Function Name | Group | Requirements | Library | LSB Section | Standard |
| __assert_fail | util.assert | 9 | libc | 13.3.17. Standard Library | LSB |
| __ctype_b_loc | locale.ctype | 3 | libc | 13.3.11. Character Type Functions | LSB |
| __ctype_get_mb_cur_max | locale.ctype | 1 | libc | 13.3.11. Character Type Functions | LSB |
| __ctype_tolower_loc | locale.ctrans | 5 | libc | 13.3.11. Character Type Functions | LSB |
| __ctype_toupper_loc | locale.ctrans | 5 | libc | 13.3.11. Character Type Functions | LSB |
| __cxa_atexit | process.process | 8 | libc | 13.3.17. Standard Library | LSB |
| __errno_location | pthread.pthread | 1 | libc | 13.3.17. Standard Library | LSB |
| __finite | util.float | 3 | libm | 13.6.1. Math | ISOC99 |
| __finitef | util.float | 3 | libm | 13.6.1. Math | ISOC99 |
| __finitel | util.float | 3 | libm | 13.6.1. Math | ISOC99 |
| __fpclassify | util.float | 3 | libm | 13.6.1. Math | LSB |
| __fpclassifyf | util.float | 3 | libm | 13.6.1. Math | LSB |
| __fpending | io.fstream.fstream | 1 | libc | 13.3.17. Standard Library | LSB |
| __fxstat | fs.meta.meta | 13 | libc | 13.3.2. System Calls | LSB |
| __fxstat64 | fs.meta.meta | 14 | libc | 13.3.16. Large File Support | LSB |
| __getpagesize | system.sysconf | 12 | libc | 13.3.17. Standard Library | LSB |
| __getpgid | process.pgroup | 10 | libc | 13.3.2. System Calls | LSB |
| __h_errno_location | socket.netdb | 1 | libc | 13.3.6. Socket Interface | LSB |
| __isinf | util.float | 3 | libc | 13.3.17. Standard Library | LSB |
| __isinff | util.float | 3 | libc | 13.3.17. Standard Library | LSB |
| __isinfl | util.float | 3 | libc | 13.3.17. Standard Library | LSB |
| __isnan | util.float | 3 | libc | 13.3.17. Standard Library | LSB |
| __isnanf | util.float | 3 | libc | 13.3.17. Standard Library | LSB |
| __isnanl | util.float | 3 | libc | 13.3.17. Standard Library | LSB |
| __libc_current_sigrtmax | signal.sigaction | 1 | libc | 13.3.4. Signal Handling | LSB |
| __libc_current_sigrtmin | signal.sigaction | 1 | libc | 13.3.4. Signal Handling | LSB |
| __libc_start_main | process.process | 5 | libc | 13.3.15. Language Support | LSB |
| __lxstat | fs.meta.meta | 18 | libc | 13.3.2. System Calls | LSB |
| __lxstat64 | fs.meta.meta | 19 | libc | 13.3.16. Large File Support | LSB |
| __mempcpy | util.string.mem | 2 | libc | 13.3.8. String Functions | LSB |
| __rawmemchr | util.string.mem | 3 | libc | 13.3.8. String Functions | LSB |
| __register_atfork | process.process | 15 | libc | 13.3.15. Language Support | LSB |
| __signbit | util.float | 3 | libm | 13.6.1. Math | ISOC99 |
| __signbitf | util.float | 3 | libm | 13.6.1. Math | ISOC99 |
| __sigsetjmp | process.goto | 12 | libc | 13.3.4. Signal Handling | LSB |
| __stpcpy | util.string.str | 4 | libc | 13.3.8. String Functions | LSB |
| __strdup | util.string.str | 7 | libc | 13.3.8. String Functions | LSB |
| __strtod_internal | util.conversion.strreal | 25 | libc | 13.3.8. String Functions | LSB |
| __strtof_internal | util.conversion.strreal | 25 | libc | 13.3.8. String Functions | LSB |
| __strtok_r | util.conversion.token | 8 | libc | 13.3.8. String Functions | LSB |
| __strtol_internal | util.conversion.strint | 32 | libc | 13.3.8. String Functions | LSB |
| __strtold_internal | util.conversion.strreal | 25 | libc | 13.3.8. String Functions | LSB |
| __strtoll_internal | util.conversion.strint | 32 | libc | 13.3.8. String Functions | LSB |
| __strtoul_internal | util.conversion.strint | 33 | libc | 13.3.8. String Functions | LSB |
| __strtoull_internal | util.conversion.strint | 33 | libc | 13.3.8. String Functions | LSB |
| __sysconf | system.sysconf | 137 | libc | 13.3.17. Standard Library | LSB |
| __sysv_signal | signal.sigaction | 23 | libc | 13.3.4. Signal Handling | LSB |
| __wcstod_internal | util.conversion.wstrreal | 25 | libc | 13.3.7. Wide Characters | LSB |
| __wcstof_internal | util.conversion.wstrreal | 25 | libc | 13.3.7. Wide Characters | LSB |
| __wcstol_internal | util.conversion.wstrint | 33 | libc | 13.3.7. Wide Characters | LSB |
| __wcstold_internal | util.conversion.wstrreal | 25 | libc | 13.3.7. Wide Characters | LSB |
| __wcstoul_internal | util.conversion.wstrint | 33 | libc | 13.3.7. Wide Characters | LSB |
| __xmknod | fs.fs | 29 | libc | 13.3.2. System Calls | LSB |
| __xstat | fs.meta.meta | 19 | libc | 13.3.2. System Calls | LSB |
| __xstat64 | fs.meta.meta | 20 | libc | 13.3.16. Large File Support | LSB |
| _exit | process.process | 27 | libc | 13.3.17. Standard Library | SUSv3 |
| _Exit | process.process | 27 | libc | 13.3.17. Standard Library | SUSv3 |
| _IO_feof | io.fstream.fstream | 1 | libc | 13.3.3. Standard I/O | LSB |
| _IO_getc | io.fstream.fstream | 2 | libc | 13.3.3. Standard I/O | LSB |
| _IO_putc | io.fstream.fstream | 1 | libc | 13.3.3. Standard I/O | LSB |
| _IO_puts | io.fstream.fstream | 1 | libc | 13.3.3. Standard I/O | LSB |
| _longjmp | process.goto | 13 | libc | 13.3.17. Standard Library | SUSv3 |
| _pthread_cleanup_pop | pthread.pthread | 2 | libpthread | 13.9.3. Posix threads | LSB |
| _pthread_cleanup_push | pthread.pthread | 2 | libpthread | 13.9.3. Posix threads | LSB |
| _setjmp | process.goto | 9 | libc | 13.3.17. Standard Library | SUSv3 |
| _tolower (min) | locale.ctrans | 3 | libc | 13.3.11. Character Type Functions | SUSv3 |
| _toupper (min) | locale.ctrans | 3 | libc | 13.3.11. Character Type Functions | SUSv3 |
| a64l | util.conversion.strint | 13 | libc | 13.3.17. Standard Library | SUSv3 |
| abort | process.process | 7 | libc | 13.3.17. Standard Library | SUSv3 |
| abs | math.integer | 3 | libc | 13.3.17. Standard Library | SUSv3 |
| accept | socket.socket | 32 | libc | 13.3.6. Socket Interface | SUSv3 |
| access | fs.meta.access | 18 | libc | 13.3.2. System Calls | SUSv3 |
| acct | system.stat | 10 | libc | 13.3.2. System Calls | LSB |
| acos | math.trig | 12 | libm | 13.6.1. Math | SUSv3 |
| acosf | math.trig | 12 | libm | 13.6.1. Math | SUSv3 |
| acosh | math.hyper | 13 | libm | 13.6.1. Math | SUSv3 |
| acoshf | math.hyper | 13 | libm | 13.6.1. Math | SUSv3 |
| acoshl | math.hyper | 13 | libm | 13.6.1. Math | SUSv3 |
| acosl | math.trig | 12 | libm | 13.6.1. Math | SUSv3 |
| addch | ncurses.char.add | 5 | libncurses | 14.5.1. Curses | SUS-CURSES |
| addchnstr | ncurses.chstr.add | 8 | libncurses | 14.5.1. Curses | SUS-CURSES |
| addchstr | ncurses.chstr.add | 6 | libncurses | 14.5.1. Curses | SUS-CURSES |
| addnstr | ncurses.string.add | 9 | libncurses | 14.5.1. Curses | SUS-CURSES |
| addstr | ncurses.string.add | 7 | libncurses | 14.5.1. Curses | SUS-CURSES |
| adjtime | time.time | 10 | libc | 13.3.12. Time Manipulation | LSB |
| adler32 | util.compress | 5 | libz | 14.2.1. Compression Library | LSB |
| alarm | time.timer | 6 | libc | 13.3.2. System Calls | SUSv3 |
| asctime | time.conversion | 3 | libc | 13.3.12. Time Manipulation | SUSv3 |
| asctime_r | time.conversion | 5 | libc | 13.3.12. Time Manipulation | SUSv3 |
| asin | math.trig | 17 | libm | 13.6.1. Math | SUSv3 |
| asinf | math.trig | 17 | libm | 13.6.1. Math | SUSv3 |
| asinh | math.hyper | 11 | libm | 13.6.1. Math | SUSv3 |
| asinhf | math.hyper | 11 | libm | 13.6.1. Math | SUSv3 |
| asinhl | math.hyper | 11 | libm | 13.6.1. Math | SUSv3 |
| asinl | math.trig | 17 | libm | 13.6.1. Math | SUSv3 |
| asprintf | util.format.printf | 80 | libc | 13.3.3. Standard I/O | LSB |
| atan | math.trig | 12 | libm | 13.6.1. Math | SUSv3 |
| atan2 | math.trig | 23 | libm | 13.6.1. Math | SUSv3 |
| atan2f | math.trig | 23 | libm | 13.6.1. Math | SUSv3 |
| atan2l | math.trig | 23 | libm | 13.6.1. Math | SUSv3 |
| atanf | math.trig | 12 | libm | 13.6.1. Math | SUSv3 |
| atanh | math.hyper | 21 | libm | 13.6.1. Math | SUSv3 |
| atanhf | math.hyper | 21 | libm | 13.6.1. Math | SUSv3 |
| atanhl | math.hyper | 21 | libm | 13.6.1. Math | SUSv3 |
| atanl | math.trig | 12 | libm | 13.6.1. Math | SUSv3 |
| atof | util.conversion.strreal | 20 | libc | 13.3.17. Standard Library | SUSv3 |
| atoi | util.conversion.strint | 13 | libc | 13.3.17. Standard Library | SUSv3 |
| atol | util.conversion.strint | 13 | libc | 13.3.17. Standard Library | SUSv3 |
| atoll | util.conversion.strint | 13 | libc | 13.3.17. Standard Library | SUSv3 |
| attr_get | ncurses.window.attr | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| attr_off | ncurses.window.attr | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| attr_on | ncurses.window.attr | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| attr_set | ncurses.window.attr | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| attroff | ncurses.window.attr | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| attron | ncurses.window.attr | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| attrset | ncurses.window.attr | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| authnone_create | socket.rpc.clnt | 1 | libc | 13.3.1. RPC | SVID.4 |
| basename | fs.name | 7 | libc | 13.3.17. Standard Library | SUSv3 |
| baudrate | ncurses.misc | 2 | libncurses | 14.5.1. Curses | SUS-CURSES |
| bcmp | util.string.mem | 5 | libc | 13.3.8. String Functions | SUSv3 |
| bcopy | util.string.mem | 2 | libc | 13.3.8. String Functions | SUSv3 |
| beep | ncurses.misc | 5 | libncurses | 14.5.1. Curses | SUS-CURSES |
| bind | socket.socket | 33 | libc | 13.3.6. Socket Interface | SUSv3 |
| bind_textdomain_codeset (min) | locale.textdomain | 21 | libc | 13.3.5. Localization Functions | LSB |
| bindresvport | socket.socket | 5 | libc | 13.3.6. Socket Interface | LSB |
| bindtextdomain (min) | locale.textdomain | 19 | libc | 13.3.5. Localization Functions | LSB |
| bkgd | ncurses.bkgd | 8 | libncurses | 14.5.1. Curses | SUS-CURSES |
| bkgdset | ncurses.bkgd | 5 | libncurses | 14.5.1. Curses | SUS-CURSES |
| border | ncurses.border | 9 | libncurses | 14.5.1. Curses | SUS-CURSES |
| box | ncurses.border | 7 | libncurses | 14.5.1. Curses | SUS-CURSES |
| brk | memory.break | 12 | libc | 13.3.2. System Calls | SUSv2 |
| bsd_signal | signal.sigaction | 10 | libc | 13.3.4. Signal Handling | SUSv3 |
| bsearch | util.search.search | 14 | libc | 13.3.17. Standard Library | SUSv3 |
| btowc (min) | util.conversion.wchar | 5 | libc | 13.3.7. Wide Characters | SUSv3 |
| bzero | util.string.mem | 1 | libc | 13.3.8. String Functions | SUSv3 |
| cabs | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| cabsf | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| cabsl | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| cacos | math.ctrig | 15 | libm | 13.6.1. Math | SUSv3 |
| cacosf | math.ctrig | 15 | libm | 13.6.1. Math | SUSv3 |
| cacosh | math.chyper | 16 | libm | 13.6.1. Math | SUSv3 |
| cacoshf | math.chyper | 16 | libm | 13.6.1. Math | SUSv3 |
| cacoshl | math.chyper | 16 | libm | 13.6.1. Math | SUSv3 |
| cacosl | math.ctrig | 15 | libm | 13.6.1. Math | SUSv3 |
| calloc | memory.heap | 12 | libc | 13.3.17. Standard Library | SUSv3 |
| can_change_color | ncurses.color | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| carg | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| cargf | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| cargl | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| casin | math.ctrig | 15 | libm | 13.6.1. Math | SUSv3 |
| casinf | math.ctrig | 15 | libm | 13.6.1. Math | SUSv3 |
| casinh | math.chyper | 15 | libm | 13.6.1. Math | SUSv3 |
| casinhf | math.chyper | 15 | libm | 13.6.1. Math | SUSv3 |
| casinhl | math.chyper | 15 | libm | 13.6.1. Math | SUSv3 |
| casinl | math.ctrig | 15 | libm | 13.6.1. Math | SUSv3 |
| catan | math.ctrig | 16 | libm | 13.6.1. Math | SUSv3 |
| catanf | math.ctrig | 16 | libm | 13.6.1. Math | SUSv3 |
| catanh | math.chyper | 15 | libm | 13.6.1. Math | SUSv3 |
| catanhf | math.chyper | 15 | libm | 13.6.1. Math | SUSv3 |
| catanhl | math.chyper | 15 | libm | 13.6.1. Math | SUSv3 |
| catanl | math.ctrig | 16 | libm | 13.6.1. Math | SUSv3 |
| catclose | locale.nlcat | 6 | libc | 13.3.5. Localization Functions | SUSv3 |
| catgets | locale.nlcat | 10 | libc | 13.3.5. Localization Functions | SUSv3 |
| catopen | locale.nlcat | 35 | libc | 13.3.5. Localization Functions | SUSv3 |
| cbreak | ncurses.input.input | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| cbrt | math.exp | 4 | libm | 13.6.1. Math | SUSv3 |
| cbrtf | math.exp | 4 | libm | 13.6.1. Math | SUSv3 |
| cbrtl | math.exp | 4 | libm | 13.6.1. Math | SUSv3 |
| ccos | math.ctrig | 17 | libm | 13.6.1. Math | SUSv3 |
| ccosf | math.ctrig | 17 | libm | 13.6.1. Math | SUSv3 |
| ccosh | math.chyper | 16 | libm | 13.6.1. Math | SUSv3 |
| ccoshf | math.chyper | 16 | libm | 13.6.1. Math | SUSv3 |
| ccoshl | math.chyper | 16 | libm | 13.6.1. Math | SUSv3 |
| ccosl | math.ctrig | 17 | libm | 13.6.1. Math | SUSv3 |
| ceil | math.real | 11 | libm | 13.6.1. Math | SUSv3 |
| ceilf | math.real | 11 | libm | 13.6.1. Math | SUSv3 |
| ceill | math.real | 11 | libm | 13.6.1. Math | SUSv3 |
| cexp | math.cexp | 16 | libm | 13.6.1. Math | SUSv3 |
| cexpf | math.cexp | 16 | libm | 13.6.1. Math | SUSv3 |
| cexpl | math.cexp | 16 | libm | 13.6.1. Math | SUSv3 |
| cfgetispeed | io.term | 1 | libc | 13.3.13. Terminal Interface Functions | SUSv3 |
| cfgetospeed | io.term | 1 | libc | 13.3.13. Terminal Interface Functions | SUSv3 |
| cfmakeraw | io.term | 5 | libc | 13.3.13. Terminal Interface Functions | LSB |
| cfsetispeed | io.term | 7 | libc | 13.3.13. Terminal Interface Functions | SUSv3 |
| cfsetospeed | io.term | 7 | libc | 13.3.13. Terminal Interface Functions | SUSv3 |
| cfsetspeed | io.term | 6 | libc | 13.3.13. Terminal Interface Functions | LSB |
| chdir | process.meta.fs | 12 | libc | 13.3.2. System Calls | SUSv3 |
| chgat | ncurses.chgat | 10 | libncurses | 14.5.1. Curses | SUS-CURSES |
| chmod | fs.meta.access | 20 | libc | 13.3.2. System Calls | SUSv3 |
| chown | fs.meta.access | 29 | libc | 13.3.2. System Calls | SUSv3 |
| chroot | process.meta.fs | 15 | libc | 13.3.2. System Calls | SUSv2 |
| cimag | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| cimagf | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| cimagl | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| clear | ncurses.clear | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| clearerr | io.fstream.fstream | 1 | libc | 13.3.3. Standard I/O | SUSv3 |
| clearok | ncurses.terminal.control | 7 | libncurses | 14.5.1. Curses | SUS-CURSES |
| clnt_create | socket.rpc.clnt | 2 | libc | 13.3.1. RPC | SVID.4 |
| clnt_pcreateerror | socket.rpc.clnt | 2 | libc | 13.3.1. RPC | SVID.4 |
| clnt_perrno | socket.rpc.clnt | 2 | libc | 13.3.1. RPC | SVID.4 |
| clnt_perror | socket.rpc.clnt | 2 | libc | 13.3.1. RPC | SVID.4 |
| clnt_spcreateerror | socket.rpc.clnt | 3 | libc | 13.3.1. RPC | SVID.4 |
| clnt_sperrno | socket.rpc.clnt | 2 | libc | 13.3.1. RPC | SVID.4 |
| clnt_sperror | socket.rpc.clnt | 3 | libc | 13.3.1. RPC | SVID.4 |
| clock | system.stat | 4 | libc | 13.3.2. System Calls | SUSv3 |
| clock_getcpuclockid | time.clock | 10 | librt | 13.17.2. Clock | SUSv3 |
| clock_getres | time.clock | 11 | librt | 13.17.2. Clock | SUSv3 |
| clock_gettime | time.clock | 14 | librt | 13.17.2. Clock | SUSv3 |
| clock_nanosleep | time.clock | 26 | librt | 13.17.2. Clock | SUSv3 |
| clock_settime | time.clock | 28 | librt | 13.17.2. Clock | SUSv3 |
| clog | math.cexp | 15 | libm | 13.6.1. Math | SUSv3 |
| clog10 | math.cexp | 15 | libm | 13.6.1. Math | ISOC99 |
| clog10f | math.cexp | 15 | libm | 13.6.1. Math | ISOC99 |
| clog10l | math.cexp | 15 | libm | 13.6.1. Math | ISOC99 |
| clogf | math.cexp | 15 | libm | 13.6.1. Math | SUSv3 |
| clogl | math.cexp | 15 | libm | 13.6.1. Math | SUSv3 |
| close | io.file | 33 | libc | 13.3.2. System Calls | SUSv3 |
| closedir | fs.dir | 7 | libc | 13.3.2. System Calls | SUSv3 |
| closelog | io.syslog | 2 | libc | 13.3.17. Standard Library | SUSv3 |
| clrtobot | ncurses.clear | 5 | libncurses | 14.5.1. Curses | SUS-CURSES |
| clrtoeol | ncurses.clear | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| color_content | ncurses.color | 7 | libncurses | 14.5.1. Curses | SUS-CURSES |
| color_set | ncurses.window.attr | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| compress | util.compress | 10 | libz | 14.2.1. Compression Library | LSB |
| compress2 | util.compress | 14 | libz | 14.2.1. Compression Library | LSB |
| compressBound | util.compress | 4 | libz | 14.2.1. Compression Library | LSB |
| confstr | system.sysconf | 45 | libc | 13.3.17. Standard Library | SUSv3 |
| conj | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| conjf | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| conjl | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| connect | socket.socket | 51 | libc | 13.3.6. Socket Interface | SUSv3 |
| copysign | math.real | 3 | libm | 13.6.1. Math | SUSv3 |
| copysignf | math.real | 3 | libm | 13.6.1. Math | SUSv3 |
| copysignl | math.real | 3 | libm | 13.6.1. Math | SUSv3 |
| copywin | ncurses.window.window | 6 | libncurses | 14.5.1. Curses | SUS-CURSES |
| cos | math.trig | 11 | libm | 13.6.1. Math | SUSv3 |
| cosf | math.trig | 11 | libm | 13.6.1. Math | SUSv3 |
| cosh | math.hyper | 12 | libm | 13.6.1. Math | SUSv3 |
| coshf | math.hyper | 12 | libm | 13.6.1. Math | SUSv3 |
| coshl | math.hyper | 12 | libm | 13.6.1. Math | SUSv3 |
| cosl | math.trig | 11 | libm | 13.6.1. Math | SUSv3 |
| cpow | math.cexp | 3 | libm | 13.6.1. Math | SUSv3 |
| cpowf | math.cexp | 3 | libm | 13.6.1. Math | SUSv3 |
| cpowl | math.cexp | 3 | libm | 13.6.1. Math | SUSv3 |
| cproj | math.complex | 3 | libm | 13.6.1. Math | SUSv3 |
| cprojf | math.complex | 3 | libm | 13.6.1. Math | SUSv3 |
| cprojl | math.complex | 3 | libm | 13.6.1. Math | SUSv3 |
| crc32 | util.compress | 5 | libz | 14.2.1. Compression Library | LSB |
| creal | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| crealf | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| creall | math.complex | 2 | libm | 13.6.1. Math | SUSv3 |
| creat | io.file | 44 | libc | 13.3.2. System Calls | SUSv3 |
| creat64 | io.file | 43 | libc | 13.3.16. Large File Support | LFS |
| crypt | util.crypt | 12 | libcrypt | 13.18.1. Encryption | SUSv3 |
| csin | math.ctrig | 17 | libm | 13.6.1. Math | SUSv3 |
| csinf | math.ctrig | 17 | libm | 13.6.1. Math | SUSv3 |
| csinh | math.chyper | 16 | libm | 13.6.1. Math | SUSv3 |
| csinhf | math.chyper | 16 | libm | 13.6.1. Math | SUSv3 |
| csinhl | math.chyper | 16 | libm | 13.6.1. Math | SUSv3 |
| csinl | math.ctrig | 17 | libm | 13.6.1. Math | SUSv3 |
| csqrt | math.cexp | 12 | libm | 13.6.1. Math | SUSv3 |
| csqrtf | math.cexp | 12 | libm | 13.6.1. Math | SUSv3 |
| csqrtl | math.cexp | 12 | libm | 13.6.1. Math | SUSv3 |
| ctan | math.ctrig | 14 | libm | 13.6.1. Math | SUSv3 |
| ctanf | math.ctrig | 14 | libm | 13.6.1. Math | SUSv3 |
| ctanh | math.chyper | 13 | libm | 13.6.1. Math | SUSv3 |
| ctanhf | math.chyper | 13 | libm | 13.6.1. Math | SUSv3 |
| ctanhl | math.chyper | 13 | libm | 13.6.1. Math | SUSv3 |
| ctanl | math.ctrig | 14 | libm | 13.6.1. Math | SUSv3 |
| ctermid | io.term | 4 | libc | 13.3.3. Standard I/O | SUSv3 |
| ctime | time.conversion | 3 | libc | 13.3.12. Time Manipulation | SUSv3 |
| ctime_r | time.conversion | 5 | libc | 13.3.12. Time Manipulation | SUSv3 |
| curs_set | ncurses.window.window | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| cuserid | process.meta.user | 8 | libc | 13.3.17. Standard Library | SUSv2 |
| daemon | process.process | 35 | libc | 13.3.17. Standard Library | LSB |
| dcgettext (min) | locale.textdomain | 13 | libc | 13.3.5. Localization Functions | LSB |
| dcngettext (min) | locale.textdomain | 16 | libc | 13.3.5. Localization Functions | LSB |
| def_prog_mode | ncurses.mode | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| def_shell_mode | ncurses.mode | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| deflate | util.compress | 43 | libz | 14.2.1. Compression Library | LSB |
| deflateBound | util.compress | 5 | libz | 14.2.1. Compression Library | LSB |
| deflateCopy | util.compress | 8 | libz | 14.2.1. Compression Library | LSB |
| deflateEnd | util.compress | 9 | libz | 14.2.1. Compression Library | LSB |
| deflateInit_ | util.compress | 22 | libz | 14.2.1. Compression Library | LSB |
| deflateInit2_ | util.compress | 28 | libz | 14.2.1. Compression Library | LSB |
| deflateParams | util.compress | 17 | libz | 14.2.1. Compression Library | LSB |
| deflateReset | util.compress | 8 | libz | 14.2.1. Compression Library | LSB |
| deflateSetDictionary | util.compress | 11 | libz | 14.2.1. Compression Library | LSB |
| del_curterm | ncurses.terminal.terminfo | 5 | libncurses | 14.5.1. Curses | SUS-CURSES |
| delay_output | ncurses.terminal.terminal | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| delch | ncurses.clear | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| deleteln | ncurses.clear | 5 | libncurses | 14.5.1. Curses | SUS-CURSES |
| delscreen | ncurses.terminal.terminal | 1 | libncurses | 14.5.1. Curses | SUS-CURSES |
| delwin | ncurses.window.window | 4 | libncurses | 14.5.1. Curses | SUS-CURSES |
| derwin | ncurses.window.window | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| dgettext (min) | locale.textdomain | 9 | libc | 13.3.5. Localization Functions | LSB |
| difftime | time.time | 2 | libc | 13.3.12. Time Manipulation | SUSv3 |
| dirname | fs.name | 8 | libc | 13.3.17. Standard Library | SUSv3 |
| div | math.integer | 5 | libc | 13.3.17. Standard Library | SUSv3 |
| dladdr | util.dl | 14 | libdl | 13.14.1. Dynamic Loader | LSB |
| dlclose | util.dl | 7 | libdl | 13.14.1. Dynamic Loader | SUSv3 |
| dlerror | util.dl | 6 | libdl | 13.14.1. Dynamic Loader | SUSv3 |
| dlopen | util.dl | 32 | libdl | 13.14.1. Dynamic Loader | LSB |
| dlsym | util.dl | 11 | libdl | 13.14.1. Dynamic Loader | LSB |
| dngettext (min) | locale.textdomain | 17 | libc | 13.3.5. Localization Functions | LSB |
| doupdate | ncurses.window.refresh | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| drand48 | math.rand | 9 | libc | 13.3.17. Standard Library | SUSv3 |
| dremf | math.real | 10 | libm | 13.6.1. Math | ISOC99 |
| dreml | math.real | 10 | libm | 13.6.1. Math | ISOC99 |
| dup | io.file | 10 | libc | 13.3.2. System Calls | SUSv3 |
| dup2 | io.file | 15 | libc | 13.3.2. System Calls | SUSv3 |
| duplocale (min) | locale.locale | 6 | libc | 13.3.5. Localization Functions | LSB |
| dupwin | ncurses.window.window | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| echo | ncurses.terminal.control | 6 | libncurses | 14.5.1. Curses | SUS-CURSES |
| echochar | ncurses.char.add | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| ecvt | util.conversion.strreal | 13 | libc | 13.3.17. Standard Library | SUSv3 |
| encrypt | util.crypt | 14 | libcrypt | 13.18.1. Encryption | SUSv3 |
| endgrent | system.user.group | 2 | libc | 13.3.14. System Database Interface | SUSv3 |
| endprotoent | socket.netdb | 2 | libc | 13.3.14. System Database Interface | SUSv3 |
| endpwent | system.user.user | 4 | libc | 13.3.14. System Database Interface | SUSv3 |
| endservent | socket.netdb | 2 | libc | 13.3.14. System Database Interface | SUSv3 |
| endutent (min) | system.user.account | 1 | libc | 13.3.14. System Database Interface | SUSv2 |
| endutxent (min) | system.user.account | 3 | libc | 13.3.14. System Database Interface | SUSv3 |
| endwin | ncurses.terminal.terminal | 8 | libncurses | 14.5.1. Curses | SUS-CURSES |
| erand48 | math.rand | 9 | libc | 13.3.17. Standard Library | SUSv3 |
| erase | ncurses.clear | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| erasechar | ncurses.clear | 3 | libncurses | 14.5.1. Curses | SUS-CURSES |
| erf | math.error | 12 | libm | 13.6.1. Math | SUSv3 |
| erfc | math.error | 14 | libm | 13.6.1. Math | SUSv3 |
| erfcf | math.error | 14 | libm | 13.6.1. Math | SUSv3 |
| erfcl | math.error | 14 | libm | 13.6.1. Math | SUSv3 |
| erff | math.error | 12 | libm | 13.6.1. Math | SUSv3 |
| erfl | math.error | 12 | libm | 13.6.1. Math | SUSv3 |
| err | util.assert | 6 | libc | 13.3.17. Standard Library | LSB |
| error | util.assert | 9 | libc | 13.3.17. Standard Library | LSB |
| errx | util.assert | 6 | libc | 13.3.17. Standard Library | LSB |
| execl | process.process | 84 | libc | 13.3.2. System Calls | SUSv3 |
| execle | process.process |