- setbuf
- setbuffer
- setenv
- setfsent
- setgrent
- sethostent
- setjmp
- setlinebuf
- setlocale
- setlogmask
- setmntent
- setpwent
- setstate
- setttyent
- setusershell
- setvbuf
- shm_open
- shm_unlink
- sigemptyset
- siginterrupt
- siglongjmp
- signbit
- sigsetjmp
- sin
- sinh
- sleep
- sprintf
- sqrt
- srand
- srandom
- sscanf
- ssignal
- stdarg
- stderr
- stdin
- stdio
- stdout
- stpcpy
- stpncpy
- strcasecmp
- strcat
- strchr
- strcmp
- strcoll
- strcpy
- strcspn
- strdup
- strdupa
- strerror
- strerror_r
- strfmon
- strfry
- strftime
- strlen
- strncasecmp
- strncat
- strncmp
- strncpy
- strndup
- strndupa
- strnlen
- strpbrk
- strptime
- strrchr
- strsep
- strsignal
- strspn
- strstr
- strtod
- strtof
MAN (3)
Library functions, covering in particular the C standard library