906 lines
16 KiB
C
906 lines
16 KiB
C
/***
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**** CAUTION!!! KEEP DOC CONSISTENT---if you change text of a message
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**** here, change two places:
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**** 1) the leading doc section (alphabetized by macro)
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**** 2) the real text inside switch(errnum)
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***/
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/*
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FUNCTION
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<<strerror>>, <<strerror_l>>---convert error number to string
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INDEX
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strerror
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INDEX
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strerror_l
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SYNOPSIS
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#include <string.h>
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char *strerror(int <[errnum]>);
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char *strerror_l(int <[errnum]>, locale_t <[locale]>);
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char *_strerror_r(struct _reent <[ptr]>, int <[errnum]>,
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int <[internal]>, int *<[error]>);
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DESCRIPTION
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<<strerror>> converts the error number <[errnum]> into a
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string. The value of <[errnum]> is usually a copy of <<errno>>.
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If <<errnum>> is not a known error number, the result points to an
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empty string.
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<<strerror_l>> is like <<strerror>> but creates a string in a format
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as expected in locale <[locale]>. If <[locale]> is LC_GLOBAL_LOCALE or
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not a valid locale object, the behaviour is undefined.
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This implementation of <<strerror>> prints out the following strings
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for each of the values defined in `<<errno.h>>':
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o+
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o 0
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Success
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o E2BIG
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Arg list too long
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o EACCES
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Permission denied
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o EADDRINUSE
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Address already in use
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o EADDRNOTAVAIL
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Address not available
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o EADV
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Advertise error
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o EAFNOSUPPORT
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Address family not supported by protocol family
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o EAGAIN
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No more processes
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o EALREADY
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Socket already connected
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o EBADF
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Bad file number
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o EBADMSG
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Bad message
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o EBUSY
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Device or resource busy
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o ECANCELED
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Operation canceled
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o ECHILD
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No children
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o ECOMM
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Communication error
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o ECONNABORTED
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Software caused connection abort
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o ECONNREFUSED
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Connection refused
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o ECONNRESET
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Connection reset by peer
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o EDEADLK
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Deadlock
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o EDESTADDRREQ
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Destination address required
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o EEXIST
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File exists
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o EDOM
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Mathematics argument out of domain of function
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o EFAULT
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Bad address
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o EFBIG
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File too large
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o EHOSTDOWN
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Host is down
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o EHOSTUNREACH
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Host is unreachable
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o EIDRM
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Identifier removed
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o EILSEQ
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Illegal byte sequence
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o EINPROGRESS
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Connection already in progress
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o EINTR
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Interrupted system call
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o EINVAL
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Invalid argument
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o EIO
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I/O error
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o EISCONN
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Socket is already connected
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o EISDIR
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Is a directory
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o ELIBACC
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Cannot access a needed shared library
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o ELIBBAD
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Accessing a corrupted shared library
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o ELIBEXEC
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Cannot exec a shared library directly
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o ELIBMAX
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Attempting to link in more shared libraries than system limit
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o ELIBSCN
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<<.lib>> section in a.out corrupted
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o EMFILE
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File descriptor value too large
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o EMLINK
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Too many links
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o EMSGSIZE
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Message too long
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o EMULTIHOP
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Multihop attempted
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o ENAMETOOLONG
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File or path name too long
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o ENETDOWN
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Network interface is not configured
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o ENETRESET
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Connection aborted by network
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o ENETUNREACH
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Network is unreachable
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o ENFILE
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Too many open files in system
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o ENOBUFS
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No buffer space available
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o ENODATA
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No data
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o ENODEV
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No such device
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o ENOENT
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No such file or directory
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o ENOEXEC
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Exec format error
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o ENOLCK
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No lock
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o ENOLINK
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Virtual circuit is gone
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o ENOMEM
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Not enough space
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o ENOMSG
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No message of desired type
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o ENONET
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Machine is not on the network
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o ENOPKG
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No package
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o ENOPROTOOPT
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Protocol not available
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o ENOSPC
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No space left on device
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o ENOSR
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No stream resources
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o ENOSTR
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Not a stream
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o ENOSYS
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Function not implemented
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o ENOTBLK
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Block device required
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o ENOTCONN
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Socket is not connected
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o ENOTDIR
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Not a directory
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o ENOTEMPTY
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Directory not empty
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o ENOTRECOVERABLE
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State not recoverable
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o ENOTSOCK
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Socket operation on non-socket
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o ENOTSUP
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Not supported
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o ENOTTY
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Not a character device
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o ENXIO
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No such device or address
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o EOPNOTSUPP
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Operation not supported on socket
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o EOVERFLOW
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Value too large for defined data type
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o EOWNERDEAD
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Previous owner died
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o EPERM
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Not owner
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o EPIPE
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Broken pipe
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o EPROTO
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Protocol error
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o EPROTOTYPE
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Protocol wrong type for socket
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o EPROTONOSUPPORT
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Unknown protocol
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o ERANGE
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Result too large
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o EREMOTE
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Resource is remote
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o EROFS
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Read-only file system
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o ESHUTDOWN
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Can't send after socket shutdown
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o ESOCKTNOSUPPORT
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Socket type not supported
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o ESPIPE
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Illegal seek
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o ESRCH
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No such process
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o ESRMNT
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Srmount error
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o ESTRPIPE
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Strings pipe error
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o ETIME
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Stream ioctl timeout
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o ETIMEDOUT
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Connection timed out
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o ETXTBSY
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Text file busy
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o EWOULDBLOCK
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Operation would block (usually same as EAGAIN)
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o EXDEV
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Cross-device link
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o-
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<<_strerror_r>> is a reentrant version of the above.
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RETURNS
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This function returns a pointer to a string. Your application must
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not modify that string.
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PORTABILITY
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ANSI C requires <<strerror>>, but does not specify the strings used
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for each error number.
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<<strerror_l>> is POSIX-1.2008.
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Although this implementation of <<strerror>> is reentrant (depending
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on <<_user_strerror>>), ANSI C declares that subsequent calls to
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<<strerror>> may overwrite the result string; therefore portable
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code cannot depend on the reentrancy of this subroutine.
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Although this implementation of <<strerror>> guarantees a non-null
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result with a NUL-terminator, some implementations return <<NULL>>
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on failure. Although POSIX allows <<strerror>> to set <<errno>>
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to EINVAL on failure, this implementation does not do so (unless
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you provide <<_user_strerror>>).
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POSIX recommends that unknown <[errnum]> result in a message
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including that value, however it is not a requirement and this
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implementation does not provide that information (unless you
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provide <<_user_strerror>>).
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This implementation of <<strerror>> provides for user-defined
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extensibility. <<errno.h>> defines <[__ELASTERROR]>, which can be
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used as a base for user-defined error values. If the user supplies a
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routine named <<_user_strerror>>, and <[errnum]> passed to
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<<strerror>> does not match any of the supported values,
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<<_user_strerror>> is called with three arguments. The first is of
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type <[int]>, and is the <[errnum]> value unknown to <<strerror>>.
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The second is of type <[int]>, and matches the <[internal]> argument
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of <<_strerror_r>>; this should be zero if called from <<strerror>>
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and non-zero if called from any other function; <<_user_strerror>> can
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use this information to satisfy the POSIX rule that no other
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standardized function can overwrite a static buffer reused by
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<<strerror>>. The third is of type <[int *]>, and matches the
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<[error]> argument of <<_strerror_r>>; if a non-zero value is stored
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into that location (usually <[EINVAL]>), then <<strerror>> will set
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<<errno>> to that value, and the XPG variant of <<strerror_r>> will
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return that value instead of zero or <[ERANGE]>. <<_user_strerror>>
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returns a <[char *]> value; returning <[NULL]> implies that the user
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function did not choose to handle <[errnum]>. The default
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<<_user_strerror>> returns <[NULL]> for all input values. Note that
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<<_user_sterror>> must be thread-safe, and only denote errors via the
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third argument rather than modifying <<errno>>, if <<strerror>> and
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<<strerror_r>> are are to comply with POSIX.
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<<strerror>> requires no supporting OS subroutines.
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QUICKREF
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strerror ansi pure
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*/
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#include <errno.h>
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#include <string.h>
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char *
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_strerror_r (struct _reent *ptr,
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int errnum,
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int internal,
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int *errptr)
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{
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char *error;
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extern char *_user_strerror (int, int, int *);
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switch (errnum)
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{
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case 0:
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error = "Success";
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break;
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/* go32 defines EPERM as EACCES */
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#if defined (EPERM) && (!defined (EACCES) || (EPERM != EACCES))
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case EPERM:
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error = "Not owner";
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break;
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#endif
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#ifdef ENOENT
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case ENOENT:
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error = "No such file or directory";
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break;
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#endif
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#ifdef ESRCH
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case ESRCH:
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error = "No such process";
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break;
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#endif
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#ifdef EINTR
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case EINTR:
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error = "Interrupted system call";
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break;
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#endif
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#ifdef EIO
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case EIO:
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error = "I/O error";
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break;
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#endif
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/* go32 defines ENXIO as ENODEV */
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#if defined (ENXIO) && (!defined (ENODEV) || (ENXIO != ENODEV))
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case ENXIO:
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error = "No such device or address";
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break;
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#endif
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#ifdef E2BIG
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case E2BIG:
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error = "Arg list too long";
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break;
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#endif
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#ifdef ENOEXEC
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case ENOEXEC:
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error = "Exec format error";
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break;
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#endif
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#ifdef EALREADY
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case EALREADY:
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error = "Socket already connected";
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break;
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#endif
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#ifdef EBADF
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case EBADF:
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error = "Bad file number";
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break;
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#endif
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#ifdef ECHILD
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case ECHILD:
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error = "No children";
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break;
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#endif
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#ifdef EDESTADDRREQ
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case EDESTADDRREQ:
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error = "Destination address required";
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break;
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#endif
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#ifdef EAGAIN
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case EAGAIN:
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error = "No more processes";
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break;
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#endif
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#ifdef ENOMEM
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case ENOMEM:
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error = "Not enough space";
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break;
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#endif
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#ifdef EACCES
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case EACCES:
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error = "Permission denied";
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break;
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#endif
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#ifdef EFAULT
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case EFAULT:
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error = "Bad address";
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break;
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#endif
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#ifdef ENOTBLK
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case ENOTBLK:
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error = "Block device required";
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break;
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#endif
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#ifdef EBUSY
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case EBUSY:
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error = "Device or resource busy";
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break;
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#endif
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#ifdef EEXIST
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case EEXIST:
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error = "File exists";
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break;
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#endif
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#ifdef EXDEV
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case EXDEV:
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error = "Cross-device link";
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break;
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#endif
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#ifdef ENODEV
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case ENODEV:
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error = "No such device";
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break;
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#endif
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#ifdef ENOTDIR
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case ENOTDIR:
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error = "Not a directory";
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break;
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#endif
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#ifdef EHOSTDOWN
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case EHOSTDOWN:
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error = "Host is down";
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break;
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#endif
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#ifdef EINPROGRESS
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case EINPROGRESS:
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error = "Connection already in progress";
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break;
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#endif
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#ifdef EISDIR
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case EISDIR:
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error = "Is a directory";
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break;
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#endif
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#ifdef EINVAL
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case EINVAL:
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error = "Invalid argument";
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break;
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#endif
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#ifdef ENETDOWN
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case ENETDOWN:
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error = "Network interface is not configured";
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break;
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#endif
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#ifdef ENETRESET
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case ENETRESET:
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error = "Connection aborted by network";
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break;
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#endif
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#ifdef ENFILE
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case ENFILE:
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error = "Too many open files in system";
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break;
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#endif
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#ifdef EMFILE
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case EMFILE:
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error = "File descriptor value too large";
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break;
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#endif
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#ifdef ENOTTY
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case ENOTTY:
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error = "Not a character device";
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break;
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#endif
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#ifdef ETXTBSY
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case ETXTBSY:
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error = "Text file busy";
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break;
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#endif
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#ifdef EFBIG
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case EFBIG:
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error = "File too large";
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break;
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#endif
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#ifdef EHOSTUNREACH
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case EHOSTUNREACH:
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error = "Host is unreachable";
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break;
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#endif
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#ifdef ENOSPC
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case ENOSPC:
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error = "No space left on device";
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break;
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#endif
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#ifdef ENOTSUP
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case ENOTSUP:
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error = "Not supported";
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break;
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#endif
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#ifdef ESPIPE
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case ESPIPE:
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error = "Illegal seek";
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break;
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#endif
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#ifdef EROFS
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case EROFS:
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error = "Read-only file system";
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break;
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#endif
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#ifdef EMLINK
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case EMLINK:
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error = "Too many links";
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break;
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#endif
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#ifdef EPIPE
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case EPIPE:
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error = "Broken pipe";
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break;
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#endif
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#ifdef EDOM
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case EDOM:
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error = "Mathematics argument out of domain of function";
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break;
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#endif
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#ifdef ERANGE
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case ERANGE:
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error = "Result too large";
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break;
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#endif
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#ifdef ENOMSG
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case ENOMSG:
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error = "No message of desired type";
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break;
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#endif
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#ifdef EIDRM
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case EIDRM:
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error = "Identifier removed";
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break;
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#endif
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#ifdef EILSEQ
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case EILSEQ:
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error = "Illegal byte sequence";
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break;
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#endif
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#ifdef EDEADLK
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case EDEADLK:
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error = "Deadlock";
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break;
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#endif
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#ifdef ENETUNREACH
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case ENETUNREACH:
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error = "Network is unreachable";
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break;
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#endif
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#ifdef ENOLCK
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case ENOLCK:
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error = "No lock";
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break;
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#endif
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#ifdef ENOSTR
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case ENOSTR:
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error = "Not a stream";
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break;
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#endif
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#ifdef ETIME
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case ETIME:
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error = "Stream ioctl timeout";
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break;
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#endif
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#ifdef ENOSR
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case ENOSR:
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error = "No stream resources";
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break;
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#endif
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#ifdef ENONET
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case ENONET:
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error = "Machine is not on the network";
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break;
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#endif
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#ifdef ENOPKG
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case ENOPKG:
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error = "No package";
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break;
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#endif
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#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 = &_REENT_ERRNO(ptr);
|
|
if ((error = _user_strerror (errnum, internal, errptr)) == 0)
|
|
error = "";
|
|
break;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
char *
|
|
strerror (int errnum)
|
|
{
|
|
return _strerror_r (_REENT, errnum, 0, NULL);
|
|
}
|
|
|
|
char *
|
|
strerror_l (int errnum, locale_t locale)
|
|
{
|
|
/* We don't support per-locale error messages. */
|
|
return _strerror_r (_REENT, errnum, 0, NULL);
|
|
}
|