# strace -Ff -e open,close,read,lseek quotaon -F vfsv0 -vaug
open("/etc/ld.so.cache", O_RDONLY)      = 3
close(3)                                = 0
open("/lib/libc.so.6", O_RDONLY)        = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300\342\1\0\0\0\0\0@"..., 832) = 832
close(3)                                = 0
open("/etc/mtab", O_RDONLY)             = 3
read(3, "/dev/simfs / reiserfs rw,usrquota"..., 4096) = 281
read(3, ""..., 4096)                    = 0
close(3)                                = 0
open("//aquota.group", O_RDONLY)        = 3
lseek(3, 0, SEEK_SET)                   = 0
read(3, "'\31\300\331\1\0\0\0"..., 8)   = 8
close(3)                                = 0
quotaon: Cannot find quota file on / [/dev/simfs] to turn quotas on/off.
open("//aquota.user", O_RDONLY)         = 3
lseek(3, 0, SEEK_SET)                   = 0
read(3, "\21\37\300\331\1\0\0\0"..., 8) = 8
close(3)                                = 0
quotaon: Cannot find quota file on / [/dev/simfs] to turn quotas on/off.