ref: 0a460e1722c50e31653359f8a86fe0b606d2b513
dir: /sys/src/cmd/ext2srv/errstr.h/
char *errmsg[] = { [Enevermind] "never mind", [Eformat] "unknown format", [Eio] "I/O error", [Enomem] "server out of memory", [Enonexist] "file does not exist", [Eexist] "file already exist", [Eperm] "permission denied", [Enofilsys] "no file system device specified", [Eauth] "authentication failed", [Enospace] "no space on device", [Elink] "write is only allowed in regular files", [Elongname] "name is too long", [Eintern] "internal Ext2 error", [Ecorrupt] "corrupt filesystem", [Enotclean] "fs not clean ... running e2fsck is recommended" };