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#include <errno.h>
#include <stdio.h>
#include <string.h>
static const char *const str[] =
{
[EPERM] = "Operation not permitted",
[ENOENT] = "No such file or directory",
[ESRCH] = "No such process",
[EINTR] = "Interrupted system call",
[EIO] = "Input/output error",
[ENXIO] = "Device not configured",
[E2BIG] = "Argument list too long",
[ENOEXEC] = "Exec format error",
[EBADF] = "Bad file descriptor",
[ECHILD] = "No child processes",
[EDEADLK] = "Resource deadlock avoided",
[ENOMEM] = "Cannot allocate memory",
[EACCES] = "Permission denied",
[EFAULT] = "Bad address",
[ENOTBLK] = "Block device required",
[EBUSY] = "Device busy",
[EEXIST] = "File exists",
[EXDEV] = "Cross-device link",
[ENODEV] = "Operation not supported by device",
[ENOTDIR] = "Not a directory",
[EISDIR] = "Is a directory",
[EINVAL] = "Invalid argument",
[ENFILE] = "Too many open files in system",
[EMFILE] = "Too many open files",
[ENOTTY] = "Inappropriate ioctl for device",
[ETXTBSY] = "Text file busy",
[EFBIG] = "File too large",
[ENOSPC] = "No space left on device",
[ESPIPE] = "Illegal seek",
[EROFS] = "Read-only file system",
[EMLINK] = "Too many links",
[EPIPE] = "Broken pipe",
[EDOM] = "Numerical argument out of domain",
[ERANGE] = "Result too large or too small",
[EAGAIN] = "Resource temporarily unavailable",
[EWOULDBLOCK] = "Operation would block",
[EINPROGRESS] = "Operation now in progress",
[EALREADY] = "Operation already in progress",
[ENOTSOCK] = "Socket operation on non-socket",
[EDESTADDRREQ] = "Destination address required",
[EMSGSIZE] = "Message too long",
[EPROTOTYPE] = "Protocol wrong type for socket",
[ENOPROTOOPT] = "Protocol option not available",
[EPROTONOSUPPORT] = "Protocol not supported",
[ESOCKTNOSUPPORT] = "Socket type not supported",
[EOPNOTSUPP] = "Operation not supported",
[EPFNOSUPPORT] = "Protocol family not supported",
[EAFNOSUPPORT] = "Address family not supported by protocol family",
[EADDRINUSE] = "Address already in use",
[EADDRNOTAVAIL] = "Can't assign requested address",
[ENETDOWN] = "Network is down",
[ENETUNREACH] = "Network is unreachable",
[ENETRESET] = "Network dropped connection on reset",
[ECONNABORTED] = "Software caused connection abort",
[ECONNRESET] = "Connection reset by peer",
[ENOBUFS] = "No buffer space available",
[EISCONN] = "Socket is already connected",
[ENOTCONN] = "Socket is not connected",
[ESHUTDOWN] = "Can't send after socket shutdown",
[ETOOMANYREFS] = "Too many references: can't splice",
[ETIMEDOUT] = "Operation timed out",
[ECONNREFUSED] = "Connection refused",
[ELOOP] = "Too many levels of symbolic links",
[ENAMETOOLONG] = "File name too long",
[EHOSTDOWN] = "Host is down",
[EHOSTUNREACH] = "No route to host",
[ENOTEMPTY] = "Directory not empty",
[EUSERS] = "Too many users",
[EDQUOT] = "Disc quota exceeded",
[ESTALE] = "Stale NFS file handle",
[EREMOTE] = "Too many levels of remote in path",
[ENOLCK] = "No locks available",
[ENOSYS] = "Function not implemented",
[EIDRM] = "Identifier removed",
[ENOMSG] = "No message of desired type",
[EOVERFLOW] = "Value too large to be stored in data type",
[EILSEQ] = "Illegal byte sequence",
[ENOTSUP] = "Not supported",
[ECANCELED] = "Operation canceled",
[EBADMSG] = "Bad or Corrupt message",
[ENODATA] = "No message available",
[ENOSR] = "No STREAM resources",
[ENOSTR] = "Not a STREAM",
[ETIME] = "STREAM ioctl timeout",
[EMULTIHOP] = "Multihop attempted",
[ENOLINK] = "Link has been severed",
[EPROTO] = "Protocol error"
};
char *strerror(int errnum)
{
static char deferr[sizeof "Unknown error -2147483648"];
if (errnum < sizeof str / sizeof *str)
return (char *)str[errnum];
snprintf(deferr, sizeof deferr, "Unknown error %d", errnum);
return deferr;
}
int strerror_r(int errnum, char *strerrbuf, size_t buflen)
{
if (errnum < sizeof str / sizeof *str) {
snprintf(strerrbuf, buflen, "%s", str[errnum]);
return strlen(str[errnum]);
}
snprintf(strerrbuf, buflen, "Unknown error %d", errnum);
return -1;
}
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