c中errno数字与文字描述对应表

0 :desc : No error
   1 :desc : Operation not permitted
   2 :desc : No such file or directory
   3 :desc : No such process
   4 :desc : Interrupted function call
   5 :desc : Input/output error
   6 :desc : No such device or address
   7 :desc : Arg list too long
   8 :desc : Exec format error
   9 :desc : Bad file descriptor
  10 :desc : No child processes
  11 :desc : Resource temporarily unavailable
  12 :desc : Not enough space
  13 :desc : Permission denied
  14 :desc : Bad address
  15 :desc : Unknown error
  16 :desc : Resource device
  17 :desc : File exists
  18 :desc : Improper link
  19 :desc : No such device
  20 :desc : Not a directory
  21 :desc : Is a directory
  22 :desc : Invalid argument
  23 :desc : Too many open files in system
  24 :desc : Too many open files
  25 :desc : Inappropriate I/O control operation
  26 :desc : Unknown error
  27 :desc : File too large
  28 :desc : No space left on device
  29 :desc : Invalid seek
  30 :desc : Read-only file system
  31 :desc : Too many links
  32 :desc : Broken pipe
  33 :desc : Domain error
  34 :desc : Result too large
  35 :desc : Unknown error
  36 :desc : Resource deadlock avoided
  37 :desc : Unknown error
  38 :desc : Filename too long
  39 :desc : No locks available
  40 :desc : Function not implemented
  41 :desc : Directory not empty
  42 :desc : Illegal byte sequence