ref: cbe4b116989c0bfec49b9ae7a1d9a85ead6648ae
dir: /sys/src/cmd/dossrv/errstr.h/
char *errmsg[ESIZE] = {
[Enevermind] "never mind",
[Eformat] "unknown format",
[Eio] "I/O error",
[Enoauth] "dossrv: authentication not required",
[Enomem] "server out of memory",
[Enonexist] "file does not exist",
[Eperm] "permission denied",
[Enofilsys] "no file system device specified",
[Eauth] "authentication failed",
[Econtig] "out of contiguous disk space",
[Ebadfcall] "bad fcall type",
[Ebadstat] "bad stat format",
[Etoolong] "file name too long",
[Eversion] "unknown 9P version",
[Eerrstr] "system call error",
};