ls | grep printf | grep .c | grep posix
test-dprintf-posix2.c
test-dprintf-posix.c
test-fprintf-posix2.c
test-fprintf-posix3.c
test-fprintf-posix.c
test-printf-posix2.c
test-printf-posix.c
test-snprintf-posix.c
test-sprintf-posix.c
test-vasnprintf-posix2.c
test-vasnprintf-posix3.c
test-vasnprintf-posix.c
test-vasprintf-posix.c
test-vdprintf-posix.c
test-vfprintf-posix.c
test-vprintf-posix.c
test-vsnprintf-posix.c
test-vsprintf-posix.c
test-xfprintf-posix.c
test-xprintf-posix.c