- stderr
- stdin
- stdio
- stdout
- stpcpy
- stpncpy
- strcasecmp
- strcasestr
- strcat
- strchr
- strchrnul
- strcmp
- strcoll
- strcpy
- strcspn
- strdup
- strdupa
- strerror
- strerror_l
- strerror_r
- strfmon
- strfry
- strftime
- strlen
- strncasecmp
- strncat
- strncmp
- strncpy
- strndup
- strndupa
- strnlen
- strpbrk
- strptime
- strrchr
- strsep
- strsignal
- strspn
- strstr
- strtod
- strtof
- strtoimax
- strtok
- strtok_r
- strtol
- strtold
- strtoll
- strtoq
- strtoul
- strtoull
- strtoumax
- strtouq
- strverscmp
- strxfrm
- swab
- swapcontext
- swprintf
- sysconf
- syslog
- system
- sysv_signal
- tan
- tanf
- tanh
- tanhf
- tanhl
- tanl
- tcgetpgrp
- tcgetsid
- tcsetpgrp
- tdelete
MAN (3)
Library functions, covering in particular the C standard library