- clock
- closedir
- CMSG_ALIGN
- CMSG_FIRSTHDR
- CMSG_NXTHDR
- CMSG_SPACE
- confstr
- conj
- conjf
- conjl
- copysign
- cos
- cosf
- cosh
- coshf
- coshl
- cpow
- cpowf
- cpowl
- creal
- crealf
- creall
- crypt
- crypt_r
- csin
- csinf
- csinh
- csinhf
- csinhl
- csinl
- ctan
- ctanf
- ctanh
- ctanhf
- ctanhl
- ctanl
- ctermid
- cuserid
- daemon
- dbopen
- difftime
- dirname
- div
- dlclose
- dlerror
- dlopen
- dlsym
- drand48
- drem
- dremf
- dreml
- dysize
- ecvt
- encrypt
- endgrent
- endnetent
- endpwent
- endrpcent
- endusershell
- erf
- erff
- erfl
- errno
- execl
- execle
- execlp
- execv
- execvp
- execvpe
- exit
MAN (3)
Library functions, covering in particular the C standard library