errno codes
1 - Operation not permitted
2 - No such file or directory
3 - No such process
4 - Interrupted function call
5 - Input/output error
5 - No such device or address
7 - Argument list too long
8 - Exec format error
9 - Bad file descriptor
10 - No child processes
11 - Resource temporarily unavailable
12 - Not enough memory available for the attempted operator
13 - Permission denied
14 - Bad address
16 - Device or resource busy
17 - File exists
18 - Cross-device link. An attempt was made to move a file to a different device
19 - No such device
20 - Not a directory
21 - Is a directory
22 - Invalid argument
23 - Too many open files in system
24 - Too many open files
25 - Inappropriate I/O control operation
27 - File too large
28 - No space left on device
29 - Invalid seek
30 - Read-only file system
31 - Too many links
32 - Broken pipe
33 - Invalid math argument
34 - Result too large
36 - Command would cause a deadlock
38 - Filename too long
39 - Too many segment locks open, lock table is full
40 - Function not supported
41 - Directory not empty
42 - Illegal sequence of bytes