A/UX® Programmer's Reference

intro(2) intro(2)
gisters or if there is not enough swap space during a fork.
13 EACCES Permission denied
An attempt was made to access a file in a way forbidden by
the protection system.
14 EFAULT Badaddress
The system encountered a hardware fault when attempting to
use an argument of a system call.
15 ENOTBLK Block device required
A nonblock file was mentioned where a block device was required,
for example, in mount.
16 EBUSY Mount device busy
The device or resource is currently unavailable. An attempt
was made to mount a device that was already mounted or to
dismount a device on which there is an active file (open file,
current directory, mounted-on file, or active text segment).
This error also occurs if an attempt is made to enable accounting
that is already enabled.
17 EEXIST File exists
An existing file was mentioned in an inappropriate context,
for example, link.
18 EXDEV Cross-device link
A link to a file on another device was attempted.
19 ENODEV No such device
An attempt was made to apply an inappropriate system call to
a device, for example, to read a write-only device.
20 ENOTDIR Not a directory
A nondirectory was specified where a directory is required,
for example, in a path prefix or as an argument to chdir(2).
21 EISDIR Is a directory
An attempt was made to write on a directory.
22 EINVAL Invalid argument
An invalid argument was implemented-for example,
dismounting a nonmounted device, mentioning an undefined
signal in signal or kill, reading or writing a file for
which lseek has generated a negative pointer. This error is
also generated by the math functions described in the (3M)
entries of this manual.
February, 1990 3
Revision C