#include <errno.h>#include "error.h"#define X(e,s) if (i == e) return s;char *error_str(i)int i;{  X(0,"no error")  X(error_intr,"interrupted system call")  X(error_nomem,"out of memory")  X(error_noent,"file does not exist")  X(error_txtbsy,"text busy")  X(error_io,"input/output error")  X(error_exist,"file already exists")  X(error_timeout,"timed out")  X(error_inprogress,"operation in progress")  X(error_again,"temporary failure")  X(error_wouldblock,"input/output would block")  X(error_pipe,"broken pipe")  X(error_perm,"permission denied")  X(error_acces,"access denied")#ifdef ESRCH  X(ESRCH,"no such process")#endif#ifdef ENXIO  X(ENXIO,"device not configured")#endif#ifdef E2BIG  X(E2BIG,"argument list too long")#endif#ifdef ENOEXEC  X(ENOEXEC,"exec format error")#endif#ifdef EBADF  X(EBADF,"file descriptor not open")#endif#ifdef ECHILD  X(ECHILD,"no child processes")#endif#ifdef EDEADLK  X(EDEADLK,"operation would cause deadlock")#endif#ifdef EFAULT  X(EFAULT,"bad address")#endif#ifdef ENOTBLK  X(ENOTBLK,"not a block device")#endif#ifdef EBUSY  X(EBUSY,"device busy")#endif#ifdef EXDEV  X(EXDEV,"cross-device link")#endif#ifdef ENODEV  X(ENODEV,"device does not support operation")#endif#ifdef ENOTDIR  X(ENOTDIR,"not a directory")#endif#ifdef EISDIR  X(EISDIR,"is a directory")#endif#ifdef EINVAL  X(EINVAL,"invalid argument")#endif#ifdef ENFILE  X(ENFILE,"system cannot open more files")#endif#ifdef EMFILE  X(EMFILE,"process cannot open more files")#endif#ifdef ENOTTY  X(ENOTTY,"not a tty")#endif#ifdef EFBIG  X(EFBIG,"file too big")#endif#ifdef ENOSPC  X(ENOSPC,"out of disk space")#endif#ifdef ESPIPE  X(ESPIPE,"unseekable descriptor")#endif#ifdef EROFS  X(EROFS,"read-only file system")#endif#ifdef EMLINK  X(EMLINK,"too many links")#endif#ifdef EDOM  X(EDOM,"input out of range")#endif#ifdef ERANGE  X(ERANGE,"output out of range")#endif#ifdef EALREADY  X(EALREADY,"operation already in progress")#endif#ifdef ENOTSOCK  X(ENOTSOCK,"not a socket")#endif#ifdef EDESTADDRREQ  X(EDESTADDRREQ,"destination address required")#endif#ifdef EMSGSIZE  X(EMSGSIZE,"message too long")#endif#ifdef EPROTOTYPE  X(EPROTOTYPE,"incorrect protocol type")#endif#ifdef ENOPROTOOPT  X(ENOPROTOOPT,"protocol not available")#endif#ifdef EPROTONOSUPPORT  X(EPROTONOSUPPORT,"protocol not supported")#endif#ifdef ESOCKTNOSUPPORT  X(ESOCKTNOSUPPORT,"socket type not supported")#endif#ifdef EOPNOTSUPP  X(EOPNOTSUPP,"operation not supported")#endif#ifdef EPFNOSUPPORT  X(EPFNOSUPPORT,"protocol family not supported")#endif#ifdef EAFNOSUPPORT  X(EAFNOSUPPORT,"address family not supported")#endif#ifdef EADDRINUSE  X(EADDRINUSE,"address already used")#endif#ifdef EADDRNOTAVAIL  X(EADDRNOTAVAIL,"address not available")#endif#ifdef ENETDOWN  X(ENETDOWN,"network down")#endif#ifdef ENETUNREACH  X(ENETUNREACH,"network unreachable")#endif#ifdef ENETRESET  X(ENETRESET,"network reset")#endif#ifdef ECONNABORTED  X(ECONNABORTED,"connection aborted")#endif#ifdef ECONNRESET  X(ECONNRESET,"connection reset")#endif#ifdef ENOBUFS  X(ENOBUFS,"out of buffer space")#endif#ifdef EISCONN  X(EISCONN,"already connected")#endif#ifdef ENOTCONN  X(ENOTCONN,"not connected")#endif#ifdef ESHUTDOWN  X(ESHUTDOWN,"socket shut down")#endif#ifdef ETOOMANYREFS  X(ETOOMANYREFS,"too many references")#endif#ifdef ECONNREFUSED  X(ECONNREFUSED,"connection refused")#endif#ifdef ELOOP  X(ELOOP,"symbolic link loop")#endif#ifdef ENAMETOOLONG  X(ENAMETOOLONG,"file name too long")#endif#ifdef EHOSTDOWN  X(EHOSTDOWN,"host down")#endif#ifdef EHOSTUNREACH  X(EHOSTUNREACH,"host unreachable")#endif#ifdef ENOTEMPTY  X(ENOTEMPTY,"directory not empty")#endif#ifdef EPROCLIM  X(EPROCLIM,"too many processes")#endif#ifdef EUSERS  X(EUSERS,"too many users")#endif#ifdef EDQUOT  X(EDQUOT,"disk quota exceeded")#endif#ifdef ESTALE  X(ESTALE,"stale NFS file handle")#endif#ifdef EREMOTE  X(EREMOTE,"too many levels of remote in path")#endif#ifdef EBADRPC  X(EBADRPC,"RPC structure is bad")#endif#ifdef ERPCMISMATCH  X(ERPCMISMATCH,"RPC version mismatch")#endif#ifdef EPROGUNAVAIL  X(EPROGUNAVAIL,"RPC program unavailable")#endif#ifdef EPROGMISMATCH  X(EPROGMISMATCH,"program version mismatch")#endif#ifdef EPROCUNAVAIL  X(EPROCUNAVAIL,"bad procedure for program")#endif#ifdef ENOLCK  X(ENOLCK,"no locks available")#endif#ifdef ENOSYS  X(ENOSYS,"system call not available")#endif#ifdef EFTYPE  X(EFTYPE,"bad file type")#endif#ifdef EAUTH  X(EAUTH,"authentication error")#endif#ifdef ENEEDAUTH  X(ENEEDAUTH,"not authenticated")#endif#ifdef ENOSTR  X(ENOSTR,"not a stream device")#endif#ifdef ETIME  X(ETIME,"timer expired")#endif#ifdef ENOSR  X(ENOSR,"out of stream resources")#endif#ifdef ENOMSG  X(ENOMSG,"no message of desired type")#endif#ifdef EBADMSG  X(EBADMSG,"bad message type")#endif#ifdef EIDRM  X(EIDRM,"identifier removed")#endif#ifdef ENONET  X(ENONET,"machine not on network")#endif#ifdef ERREMOTE  X(ERREMOTE,"object not local")#endif#ifdef ENOLINK  X(ENOLINK,"link severed")#endif#ifdef EADV  X(EADV,"advertise error")#endif#ifdef ESRMNT  X(ESRMNT,"srmount error")#endif#ifdef ECOMM  X(ECOMM,"communication error")#endif#ifdef EPROTO  X(EPROTO,"protocol error")#endif#ifdef EMULTIHOP  X(EMULTIHOP,"multihop attempted")#endif#ifdef EREMCHG  X(EREMCHG,"remote address changed")#endif  return "unknown error";}