tmpfile
(tmpnam)
tmpnam_r
tempnam

fopencookie
setbuf
setvbuf

fscanf
sscanf

popen
pclose

ctermid
cuserid

flockfile
trylockfile
funlockfile

(getc)
(getdelim)
(getline)
(perror)
(setbuffer)
(setlinebuf)
(putc)
(getchar)
(putchar)