ref: ff4daa7e93f4ea09506276ecdb69fa1cca19a7a7
dir: /sys/src/cmd/disk/kfs/errno.h/
enum{
Enevermind, /* never mind */
Enofd, /* no free file descriptors */
Efidinuse, /* fid already in use */
Ebadfd, /* fid out of range or not open */
Ebadusefd, /* inappropriate use of fid */
Ebadarg, /* bad arg in system call */
Enonexist, /* file does not exist */
Efilename, /* file name syntax */
Ebadchar, /* bad character in file name */
Ebadsharp, /* unknown device in # filename */
Ebadexec, /* a.out header invalid */
Eioload, /* i/o error in demand load */
Eperm, /* permission denied */
Enotdir, /* not a directory */
Enochild, /* no living children */
Enoseg, /* no free segments */
Ebuf, /* buffer wrong size */
Ebadmount, /* inconsistent mount */
Enomount, /* mount table full */
Enomntdev, /* no free mount devices */
Eshutdown, /* mounted device shut down */
Einuse, /* device or object already in use */
Eio, /* i/o error */
Eisdir, /* file is a directory */
Ebaddirread, /* directory read not quantized */
Esegaddr, /* illegal segment addresses or size */
Enoenv, /* no free environment resources */
Eprocdied, /* process exited */
Enocreate, /* mounted directory forbids creation */
Enotunion, /* attempt to union with non-mounted directory */
Emount, /* inconsistent mount */
Enosrv, /* no free server slots */
Egreg, /* it's all greg's fault */
};