SOCKATMARK (man3p)
sockatmark — determine whether a socket is at the out-of-band mark
sockatmark — determine whether a socket is at the out-of-band mark
shmdt — XSI shared memory detach operation
swscanf — convert formatted wide-character input
pthread_attr_setstack — set the stack attribute
pow, powf, powl — power function
setegid — set the effective group ID
strtok, strtok_r — split string into tokens
fgetc — get a byte from a stream
vscanf — format input of a stdarg argument list
setpriority — set the nice value