/***
**** CAUTION!!! KEEP DOC CONSISTENT---if you change text of a message
**** here, change two places:
**** 1) the leading doc section (alphabetized by macro)
**** 2) the real text inside switch(errnum)
***/
/*
FUNCTION
<<strerror>>---convert error number to string
INDEX
strerror
ANSI_SYNOPSIS
#include <string.h>
char *strerror(int <[errnum]>);
char *_strerror_r(struct _reent <[ptr]>, int <[errnum]>,
int <[internal]>, int *<[error]>);
TRAD_SYNOPSIS
#include <string.h>
char *strerror(<[errnum]>)
int <[errnum]>;
DESCRIPTION
<<strerror>> converts the error number <[errnum]> into a
string. The value of <[errnum]> is usually a copy of <<errno>>.
If <<errnum>> is not a known error number, the result points to an
empty string.
This implementation of <<strerror>> prints out the following strings
for each of the values defined in `<<errno.h>>':
o+
o 0
Success
o E2BIG
Arg list too long
o EACCES
Permission denied
o EADDRINUSE
Address already in use
o EADDRNOTAVAIL
Address not available
o EADV
Advertise error
o EAFNOSUPPORT
Address family not supported by protocol family
o EAGAIN
No more processes
o EALREADY
Socket already connected
o EBADF
Bad file number
o EBADMSG
Bad message
o EBUSY
Device or resource busy
o ECANCELED
Operation canceled
o ECHILD
No children
o ECOMM
Communication error
o ECONNABORTED
Software caused connection abort
o ECONNREFUSED
Connection refused
o ECONNRESET
Connection reset by peer
o EDEADLK
Deadlock
o EDESTADDRREQ
Destination address required
o EEXIST
File exists
o EDOM
Mathematics argument out of domain of function
o EFAULT
Bad address
o EFBIG
File too large
o EHOSTDOWN
Host is down
o EHOSTUNREACH
Host is unreachable
o EIDRM
Identifier removed
o EILSEQ
Illegal byte sequence
o EINPROGRESS
Connection already in progress
o EINTR
Interrupted system call
o EINVAL
Invalid argument
o EIO
I/O error
o EISCONN
Socket is already connected
o EISDIR
Is a directory
o ELIBACC
Cannot access a needed shared library
o ELIBBAD
Accessing a corrupted shared library
o ELIBEXEC
Cannot exec a shared library directly
o ELIBMAX
Attempting to link in more shared libraries than system limit
o ELIBSCN
<<.lib>> section in a.out corrupted
o EMFILE
File descriptor value too large
o EMLINK
Too many links
o EMSGSIZE
Message too long
o EMULTIHOP
Multihop attempted
o ENAMETOOLONG
File or path name too long
o ENETDOWN
Network interface is not configured
o ENETRESET
Connection aborted by network
o ENETUNREACH
Network is unreachable
o ENFILE
Too many open files in system
o ENOBUFS
No buffer space available
o ENODATA
No data
o ENODEV
No such device
o ENOENT
No such file or directory
o ENOEXEC
Exec format error
o ENOLCK
No lock
o ENOLINK
Virtual circuit is gone
o ENOMEM
Not enough space
o ENOMSG
No message of desired type
o ENONET
Machine is not on the network
o ENOPKG
No package
o ENOPROTOOPT
Protocol not available
o ENOSPC
No space left on device
o ENOSR
No stream resources
o ENOSTR
Not a stream
o ENOSYS
Function not implemented
o ENOTBLK
Block device required
o ENOTCONN
Socket is not connected
o ENOTDIR
Not a directory
o ENOTEMPTY
Directory not empty
o ENOTRECOVERABLE
State not recoverable
o ENOTSOCK
Socket operation on non-socket
o ENOTSUP
Not supported
o ENOTTY
Not a character device
o ENXIO
No such device or address
o EOPNOTSUPP
Operation not supported on socket
o EOVERFLOW
Value too large for defined data type
o EOWNERDEAD
Previous owner died
o EPERM
Not owner
o EPIPE
Broken pipe
o EPROTO
Protocol error
o EPROTOTYPE
Protocol wrong type for socket
o EPROTONOSUPPORT
Unknown protocol
o ERANGE
Result too large
o EREMOTE
Resource is remote
o EROFS
Read-only file system
o ESHUTDOWN
Can't send after socket shutdown
o ESOCKTNOSUPPORT
Socket type not supported
o ESPIPE
Illegal seek
o ESRCH
No such process
o ESRMNT
Srmount error
o ESTRPIPE
Strings pipe error
o ETIME
Stream ioctl timeout
o ETIMEDOUT
Connection timed out
o ETXTBSY
Text file busy
o EWOULDBLOCK
Operation would block (usually same as EAGAIN)
o EXDEV
Cross-device link
o-
<<_strerror_r>> is a reentrant version of the above.
RETURNS
This function returns a pointer to a string. Your application must
not modify that string.
PORTABILITY
ANSI C requires <<strerror>>, but does not specify the strings used
for each error number.
Although this implementation of <<strerror>> is reentrant (depending
on <<_user_strerror>>), ANSI C declares that subsequent calls to
<<strerror>> may overwrite the result string; therefore portable
code cannot depend on the reentrancy of this subroutine.
Although this implementation of <<strerror>> guarantees a non-null
result with a NUL-terminator, some implementations return <<NULL>>
on failure. Although POSIX allows <<strerror>> to set <<errno>>
to EINVAL on failure, this implementation does not do so (unless
you provide <<_user_strerror>>).
POSIX recommends that unknown <[errnum]> result in a message
including that value, however it is not a requirement and this
implementation does not provide that information (unless you
provide <<_user_strerror>>).
This implementation of <<strerror>> provides for user-defined
extensibility. <<errno.h>> defines <[__ELASTERROR]>, which can be
used as a base for user-defined error values. If the user supplies a
routine named <<_user_strerror>>, and <[errnum]> passed to
<<strerror>> does not match any of the supported values,
<<_user_strerror>> is called with three arguments. The first is of
type <[int]>, and is the <[errnum]> value unknown to <<strerror>>.
The second is of type <[int]>, and matches the <[internal]> argument
of <<_strerror_r>>; this should be zero if called from <<strerror>>
and non-zero if called from any other function; <<_user_strerror>> can
use this information to satisfy the POSIX rule that no other
standardized function can overwrite a static buffer reused by
<<strerror>>. The third is of type <[int *]>, and matches the
<[error]> argument of <<_strerror_r>>; if a non-zero value is stored
into that location (usually <[EINVAL]>), then <<strerror>> will set
<<errno>> to that value, and the XPG variant of <<strerror_r>> will
return that value instead of zero or <[ERANGE]>. <<_user_strerror>>
returns a <[char *]> value; returning <[NULL]> implies that the user
function did not choose to handle <[errnum]>. The default
<<_user_strerror>> returns <[NULL]> for all input values. Note that
<<_user_sterror>> must be thread-safe, and only denote errors via the
third argument rather than modifying <<errno>>, if <<strerror>> and
<<strerror_r>> are are to comply with POSIX.
<<strerror>> requires no supporting OS subroutines.
QUICKREF
strerror ansi pure
*/
#include <errno.h>
#include <string.h>
char *
_DEFUN (_strerror_r, (ptr, errnum, internal, errptr),
struct _reent *ptr _AND
int errnum _AND
int internal _AND
int *errptr)
{
char *error;
extern char *_user_strerror _PARAMS ((int, int, int *));
switch (errnum)
{
case 0:
error = "Success";
break;
/* go32 defines EPERM as EACCES */
#if defined (EPERM) && (!defined (EACCES) || (EPERM != EACCES))
case EPERM:
error = "Not owner";
break;
#endif
#ifdef ENOENT
case ENOENT:
error = "No such file or directory";
break;
#endif
#ifdef ESRCH
case ESRCH:
error = "No such process";
break;
#endif
#ifdef EINTR
case EINTR:
error = "Interrupted system call";
break;
#endif
#ifdef EIO
case EIO:
error = "I/O error";
break;
#endif
/* go32 defines ENXIO as ENODEV */
#if defined (ENXIO) && (!defined (ENODEV) || (ENXIO != ENODEV))
case ENXIO:
error = "No such device or address";
break;
#endif
#ifdef E2BIG
case E2BIG:
error = "Arg list too long";
break;
#endif
#ifdef ENOEXEC
case ENOEXEC:
error = "Exec format error";
break;
#endif
#ifdef EALREADY
case EALREADY:
error = "Socket already connected";
break;
#endif
#ifdef EBADF
case EBADF:
error = "Bad file number";
break;
#endif
#ifdef ECHILD
case ECHILD:
error = "No children";
break;
#endif
#ifdef EDESTADDRREQ
case EDESTADDRREQ:
error = "Destination address required";
break;
#endif
#ifdef EAGAIN
case EAGAIN:
error = "No more processes";
break;
#endif
#ifdef ENOMEM
case ENOMEM:
error = "Not enough space";
break;
#endif
#ifdef EACCES
case EACCES:
error = "Permission denied";
break;
#endif
#ifdef EFAULT
case EFAULT:
error = "Bad address";
break;
#endif
#ifdef ENOTBLK
case ENOTBLK:
error = "Block device required";
break;
#endif
#ifdef EBUSY
case EBUSY:
error = "Device or resource busy";
break;
#endif
#ifdef EEXIST
case EEXIST:
error = "File exists";
break;
#endif
#ifdef EXDEV
case EXDEV:
error = "Cross-device link";
break;
#endif
#ifdef ENODEV
case ENODEV:
error = "No such device";
break;
#endif
#ifdef ENOTDIR
case ENOTDIR:
error = "Not a directory";
break;
#endif
#ifdef EHOSTDOWN
case EHOSTDOWN:
error = "Host is down";
break;
#endif
#ifdef EINPROGRESS
case EINPROGRESS:
error = "Connection already in progress";
break;
#endif
#ifdef EISDIR
case EISDIR:
error = "Is a directory";
break;
#endif
#ifdef EINVAL
case EINVAL:
error = "Invalid argument";
break;
#endif
#ifdef ENETDOWN
case ENETDOWN:
error = "Network interface is not configured";
break;
#endif
#ifdef ENETRESET
case ENETRESET:
error = "Connection aborted by network";
break;
#endif
#ifdef ENFILE
case ENFILE:
error = "Too many open files in system";
break;
#endif
#ifdef EMFILE
case EMFILE:
error = "File descriptor value too large";
break;
#endif
#ifdef ENOTTY
case ENOTTY:
error = "Not a character device";
break;
#endif
#ifdef ETXTBSY
case ETXTBSY:
error = "Text file busy";
break;
#endif
#ifdef EFBIG
case EFBIG:
error = "File too large";
break;
#endif
#ifdef EHOSTUNREACH
case EHOSTUNREACH:
error = "Host is unreachable";
break;
#endif
#ifdef ENOSPC
case ENOSPC:
error = "No space left on device";
break;
#endif
#ifdef ENOTSUP
case ENOTSUP:
error = "Not supported";
break;
#endif
#ifdef ESPIPE
case ESPIPE:
error = "Illegal seek";
break;
#endif
#ifdef EROFS
case EROFS:
error = "Read-only file system";
break;
#endif
#ifdef EMLINK
case EMLINK:
error = "Too many links";
break;
#endif
#ifdef EPIPE
case EPIPE:
error = "Broken pipe";
break;
#endif
#ifdef EDOM
case EDOM:
error = "Mathematics argument out of domain of function";
break;
#endif
#ifdef ERANGE
case ERANGE:
error = "Result too large";
break;
#endif
#ifdef ENOMSG
case ENOMSG:
error = "No message of desired type";
break;
#endif
#ifdef EIDRM
case EIDRM:
error = "Identifier removed";
break;
#endif
#ifdef EILSEQ
case EILSEQ:
error = "Illegal byte sequence";
break;
#endif
#ifdef EDEADLK
case EDEADLK:
error = "Deadlock";
break;
#endif
#ifdef ENETUNREACH
case ENETUNREACH:
error = "Network is unreachable";
break;
#endif
#ifdef ENOLCK
case ENOLCK:
error = "No lock";
break;
#endif
#ifdef ENOSTR
case ENOSTR:
error = "Not a stream";
break;
#endif
#ifdef ETIME
case ETIME:
error = "Stream ioctl timeout";
break;
#endif
#ifdef ENOSR
case ENOSR:
error = "No stream resources";
break;
#endif
#ifdef ENONET
case ENONET:
error = "Machine is not on the network";
break;
#endif
#ifdef ENOPKG
case ENOPKG:
error = "No package";
break;
#endif
#ifdef EREMOTE
case EREMOTE:
error = "Resource is remote";
break;
#endif
#ifdef ENOLINK
case ENOLINK:
error = "Virtual circuit is gone";
break;
#endif
#ifdef EADV
case EADV:
error = "Advertise error";
break;
#endif
#ifdef ESRMNT
case ESRMNT:
error = "Srmount error";
break;
#endif
#ifdef ECOMM
case ECOMM:
error = "Communication error";
break;
#endif
#ifdef EPROTO
case EPROTO:
error = "Protocol error";
break;
#endif
#ifdef EPROTONOSUPPORT
case EPROTONOSUPPORT:
error = "Unknown protocol";
break;
#endif
#ifdef EMULTIHOP
case EMULTIHOP:
error = "Multihop attempted";
break;
#endif
#ifdef EBADMSG
case EBADMSG:
error = "Bad message";
break;
#endif
#ifdef ELIBACC
case ELIBACC:
error = "Cannot access a needed shared library";
break;
#endif
#ifdef ELIBBAD
case ELIBBAD:
error = "Accessing a corrupted shared library";
break;
#endif
#ifdef ELIBSCN
case ELIBSCN:
error = ".lib section in a.out corrupted";
break;
#endif
#ifdef ELIBMAX
case ELIBMAX:
error = "Attempting to link in more shared libraries than system limit";
break;
#endif
#ifdef ELIBEXEC
case ELIBEXEC:
error = "Cannot exec a shared library directly";
break;
#endif
#ifdef ENOSYS
case ENOSYS:
error = "Function not implemented";
break;
#endif
#ifdef ENMFILE
case ENMFILE:
error = "No more files";
break;
#endif
#ifdef ENOTEMPTY
case ENOTEMPTY:
error = "Directory not empty";
break;
#endif
#ifdef ENAMETOOLONG
case ENAMETOOLONG:
error = "File or path name too long";
break;
#endif
#ifdef ELOOP
case ELOOP:
error = "Too many symbolic links";
break;
#endif
#ifdef ENOBUFS
case ENOBUFS:
error = "No buffer space available";
break;
#endif
#ifdef ENODATA
case ENODATA:
error = "No data";
break;
#endif
#ifdef EAFNOSUPPORT
case EAFNOSUPPORT:
error = "Address family not supported by protocol family";
break;
#endif
#ifdef EPROTOTYPE
case EPROTOTYPE:
error = "Protocol wrong type for socket";
break;
#endif
#ifdef ENOTSOCK
case ENOTSOCK:
error = "Socket operation on non-socket";
break;
#endif
#ifdef ENOPROTOOPT
case ENOPROTOOPT:
error = "Protocol not available";
break;
#endif
#ifdef ESHUTDOWN
case ESHUTDOWN:
error = "Can't send after socket shutdown";
break;
#endif
#ifdef ECONNREFUSED
case ECONNREFUSED:
error = "Connection refused";
break;
#endif
#ifdef ECONNRESET
case ECONNRESET:
error = "Connection reset by peer";
break;
#endif
#ifdef EADDRINUSE
case EADDRINUSE:
error = "Address already in use";
break;
#endif
#ifdef EADDRNOTAVAIL
case EADDRNOTAVAIL:
error = "Address not available";
break;
#endif
#ifdef ECONNABORTED
case ECONNABORTED:
error = "Software caused connection abort";
break;
#endif
#if (defined(EWOULDBLOCK) && (!defined (EAGAIN) || (EWOULDBLOCK != EAGAIN)))
case EWOULDBLOCK:
error = "Operation would block";
break;
#endif
#ifdef ENOTCONN
case ENOTCONN:
error = "Socket is not connected";
break;
#endif
#ifdef ESOCKTNOSUPPORT
case ESOCKTNOSUPPORT:
error = "Socket type not supported";
break;
#endif
#ifdef EISCONN
case EISCONN:
error = "Socket is already connected";
break;
#endif
#ifdef ECANCELED
case ECANCELED:
error = "Operation canceled";
break;
#endif
#ifdef ENOTRECOVERABLE
case ENOTRECOVERABLE:
error = "State not recoverable";
break;
#endif
#ifdef EOWNERDEAD
case EOWNERDEAD:
error = "Previous owner died";
break;
#endif
#ifdef ESTRPIPE
case ESTRPIPE:
error = "Streams pipe error";
break;
#endif
#if defined(EOPNOTSUPP) && (!defined(ENOTSUP) || (ENOTSUP != EOPNOTSUPP))
case EOPNOTSUPP:
error = "Operation not supported on socket";
break;
#endif
#ifdef EOVERFLOW
case EOVERFLOW:
error = "Value too large for defined data type";
break;
#endif
#ifdef EMSGSIZE
case EMSGSIZE:
error = "Message too long";
break;
#endif
#ifdef ETIMEDOUT
case ETIMEDOUT:
error = "Connection timed out";
break;
#endif
default:
if (!errptr)
errptr = &ptr->_errno;
if ((error = _user_strerror (errnum, internal, errptr)) == 0)
error = "";
break;
}
return error;
}
char *
int errnum)
{
return _strerror_r (_REENT, errnum, 0, NULL);
}