1: <unistd.h>:
    2: 
    3: lssek:   Probably should be __wur but lseek(fd,SEEK_SET,0) will succeed if
    4:          the descriptor is fine.
    5: lseek64: same
    6: 
    7: setuid:  will always succeed given correct privileges, so there might
    8:          be places which don't check for it.
    9: setreuid: same
   10: seteuid: same
   11: setgid:  same
   12: setregid: same
   13: setegid: same
   14: setresuid: same
   15: setresgid: same
   16: 
   17: 
   18: <stdio.h>:
   19: 
   20: setvbuf:   if stream and buffer are fine and other parameters constant,
   21:            it cannot really fail.
   22: fseek:     see lseek
   23: fseeko:    likewise
   24: fgetpos:   similarly
   25: fsetpos:   likewise
   26: 
   27: 
   28: <stdlib.h>:
   29: 
   30: atexit:    it is guaranteed that a certain number of handlers can be
   31:            registered, so some calls might need not be checked
   32: on_exit:   same
   33: random functions:  one might want to discard a number of results.  In any
   34:            case, no security problem
   35: 
   36: 
   37: putenv:    probably SHOULD be marked, but we'll wait a bit.
   38: setenv:    likewise
   39: unsetenv:  likewise
   40: clearenv:  likewise
   41: 
   42: mbstowcs:  probably SHOULD be marked
   43: wcstombs:  likewise
   44: 
   45: ptsname_r: probably SHOULD be marked