Difference between revisions of "cpp/header/cerrno"

Latest revision as of 01:02, 13 September 2023

This header was originally in the C standard library as <errno.h>.

This header is part of the error handling library.

errno	macro which expands to POSIX-compatible thread-local error number variable (macro variable)[edit]
E2BIG (C++11)	Argument list too long (macro constant)
EACCES (C++11)	Permission denied (macro constant)
EADDRINUSE (C++11)	Address in use (macro constant)
EADDRNOTAVAIL (C++11)	Address not available (macro constant)
EAFNOSUPPORT (C++11)	Address family not supported (macro constant)
EAGAIN (C++11)	Resource unavailable, try again (macro constant)
EALREADY (C++11)	Connection already in progress (macro constant)
EBADF (C++11)	Bad file descriptor (macro constant)
EBADMSG (C++11)	Bad message (macro constant)
EBUSY (C++11)	Device or resource busy (macro constant)
ECANCELED (C++11)	Operation canceled (macro constant)
ECHILD (C++11)	No child processes (macro constant)
ECONNABORTED (C++11)	Connection aborted (macro constant)
ECONNREFUSED (C++11)	Connection refused (macro constant)
ECONNRESET (C++11)	Connection reset (macro constant)
EDEADLK (C++11)	Resource deadlock would occur (macro constant)
EDESTADDRREQ (C++11)	Destination address required (macro constant)
EDOM	Mathematics argument out of domain of function (macro constant)
EEXIST (C++11)	File exists (macro constant)
EFAULT (C++11)	Bad address (macro constant)
EFBIG (C++11)	File too large (macro constant)
EHOSTUNREACH (C++11)	Host is unreachable (macro constant)
EIDRM (C++11)	Identifier removed (macro constant)
EILSEQ	Illegal byte sequence (macro constant)
EINPROGRESS (C++11)	Operation in progress (macro constant)
EINTR (C++11)	Interrupted function (macro constant)
EINVAL (C++11)	Invalid argument (macro constant)
EIO (C++11)	I/O error (macro constant)
EISCONN (C++11)	Socket is connected (macro constant)
EISDIR (C++11)	Is a directory (macro constant)
ELOOP (C++11)	Too many levels of symbolic links (macro constant)
EMFILE (C++11)	File descriptor value too large (macro constant)
EMLINK (C++11)	Too many links (macro constant)
EMSGSIZE (C++11)	Message too large (macro constant)
ENAMETOOLONG (C++11)	Filename too long (macro constant)
ENETDOWN (C++11)	Network is down (macro constant)
ENETRESET (C++11)	Connection aborted by network (macro constant)
ENETUNREACH (C++11)	Network unreachable (macro constant)
ENFILE (C++11)	Too many files open in system (macro constant)
ENOBUFS (C++11)	No buffer space available (macro constant)
ENODATA (C++11) (deprecated in C++23)	No message is available on the STREAM head read queue (macro constant)
ENODEV (C++11)	No such device (macro constant)
ENOENT (C++11)	No such file or directory (macro constant)
ENOEXEC (C++11)	Executable file format error (macro constant)
ENOLCK (C++11)	No locks available (macro constant)
ENOLINK (C++11)	Link has been severed (macro constant)
ENOMEM (C++11)	Not enough space (macro constant)
ENOMSG (C++11)	No message of the desired type (macro constant)
ENOPROTOOPT (C++11)	Protocol not available (macro constant)
ENOSPC (C++11)	No space left on device (macro constant)
ENOSR (C++11) (deprecated in C++23)	No STREAM resources (macro constant)
ENOSTR (C++11) (deprecated in C++23)	Not a STREAM (macro constant)
ENOSYS (C++11)	Function not supported (macro constant)
ENOTCONN (C++11)	The socket is not connected (macro constant)
ENOTDIR (C++11)	Not a directory (macro constant)
ENOTEMPTY (C++11)	Directory not empty (macro constant)
ENOTRECOVERABLE (C++11)	State not recoverable (macro constant)
ENOTSOCK (C++11)	Not a socket (macro constant)
ENOTSUP (C++11)	Not supported (macro constant)
ENOTTY (C++11)	Inappropriate I/O control operation (macro constant)
ENXIO (C++11)	No such device or address (macro constant)
EOPNOTSUPP (C++11)	Operation not supported on socket (macro constant)
EOVERFLOW (C++11)	Value too large to be stored in data type (macro constant)
EOWNERDEAD (C++11)	Previous owner died (macro constant)
EPERM (C++11)	Operation not permitted (macro constant)
EPIPE (C++11)	Broken pipe (macro constant)
EPROTO (C++11)	Protocol error (macro constant)
EPROTONOSUPPORT (C++11)	Protocol not supported (macro constant)
EPROTOTYPE (C++11)	Protocol wrong type for socket (macro constant)
ERANGE	Result too large (macro constant)
EROFS (C++11)	Read-only file system (macro constant)
ESPIPE (C++11)	Invalid seek (macro constant)
ESRCH (C++11)	No such process (macro constant)
ETIME (C++11) (deprecated in C++23)	Stream `ioctl()` timeout (macro constant)
ETIMEDOUT (C++11)	Connection timed out (macro constant)
ETXTBSY (C++11)	Text file busy (macro constant)
EWOULDBLOCK (C++11)	Operation would block (macro constant)
EXDEV (C++11)	Cross-device link (macro constant)

[edit] Notes

Although the header <cerrno> is based on the C standard library header <errno.h>, the majority of the macros defined by <cerrno> were adopted by C++ from the POSIX standard, rather than the C standard library.

[edit] Synopsis

#define errno /* see description */
#define E2BIG /* see description */           // freestanding
#define EACCES /* see description */          // freestanding
#define EADDRINUSE /* see description */      // freestanding
#define EADDRNOTAVAIL /* see description */   // freestanding
#define EAFNOSUPPORT /* see description */    // freestanding
#define EAGAIN /* see description */          // freestanding
#define EALREADY /* see description */        // freestanding
#define EBADF /* see description */           // freestanding
#define EBADMSG /* see description */         // freestanding
#define EBUSY /* see description */           // freestanding
#define ECANCELED /* see description */       // freestanding
#define ECHILD /* see description */          // freestanding
#define ECONNABORTED /* see description */    // freestanding
#define ECONNREFUSED /* see description */    // freestanding
#define ECONNRESET /* see description */      // freestanding
#define EDEADLK /* see description */         // freestanding
#define EDESTADDRREQ /* see description */    // freestanding
#define EDOM /* see description */            // freestanding
#define EEXIST /* see description */          // freestanding
#define EFAULT /* see description */          // freestanding
#define EFBIG /* see description */           // freestanding
#define EHOSTUNREACH /* see description */    // freestanding
#define EIDRM /* see description */           // freestanding
#define EILSEQ /* see description */          // freestanding
#define EINPROGRESS /* see description */     // freestanding
#define EINTR /* see description */           // freestanding
#define EINVAL /* see description */          // freestanding
#define EIO /* see description */             // freestanding
#define EISCONN /* see description */         // freestanding
#define EISDIR /* see description */          // freestanding
#define ELOOP /* see description */           // freestanding
#define EMFILE /* see description */          // freestanding
#define EMLINK /* see description */          // freestanding
#define EMSGSIZE /* see description */        // freestanding
#define ENAMETOOLONG /* see description */    // freestanding
#define ENETDOWN /* see description */        // freestanding
#define ENETRESET /* see description */       // freestanding
#define ENETUNREACH /* see description */     // freestanding
#define ENFILE /* see description */          // freestanding
#define ENOBUFS /* see description */         // freestanding
#define ENODEV /* see description */          // freestanding
#define ENOENT /* see description */          // freestanding
#define ENOEXEC /* see description */         // freestanding
#define ENOLCK /* see description */          // freestanding
#define ENOLINK /* see description */         // freestanding
#define ENOMEM /* see description */          // freestanding
#define ENOMSG /* see description */          // freestanding
#define ENOPROTOOPT /* see description */     // freestanding
#define ENOSPC /* see description */          // freestanding
#define ENOSYS /* see description */          // freestanding
#define ENOTCONN /* see description */        // freestanding
#define ENOTDIR /* see description */         // freestanding
#define ENOTEMPTY /* see description */       // freestanding
#define ENOTRECOVERABLE /* see description */ // freestanding
#define ENOTSOCK /* see description */        // freestanding
#define ENOTSUP /* see description */         // freestanding
#define ENOTTY /* see description */          // freestanding
#define ENXIO /* see description */           // freestanding
#define EOPNOTSUPP /* see description */      // freestanding
#define EOVERFLOW /* see description */       // freestanding
#define EOWNERDEAD /* see description */      // freestanding
#define EPERM /* see description */           // freestanding
#define EPIPE /* see description */           // freestanding
#define EPROTO /* see description */          // freestanding
#define EPROTONOSUPPORT /* see description */ // freestanding
#define EPROTOTYPE /* see description */      // freestanding
#define ERANGE /* see description */          // freestanding
#define EROFS /* see description */           // freestanding
#define ESPIPE /* see description */          // freestanding
#define ESRCH /* see description */           // freestanding
#define ETIMEDOUT /* see description */       // freestanding
#define ETXTBSY /* see description */         // freestanding
#define EWOULDBLOCK /* see description */     // freestanding
#define EXDEV /* see description */           // freestanding

[edit] Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 288	C++98	the macro `EILSEQ` was not defined in `<cerrno>`	defined

[edit] See also

Description for the error number values

@@ Line 3: / Line 3: @@
 {{cpp/header/c}}
 This header is part of the [[cpp/error|error handling]] library.
 ===Macros===
 {{dsc begin}}
-{{dsc inc | cpp/error/dsc errno}}
+{{dsc inc|cpp/error/dsc errno}}
-{{dsc macro const | E2BIG            | nolink=true| notes={{mark c++11}}| Argument list too long }}
+{{dsc macro const|E2BIG           |nolink=true|notes={{mark c++11}}|Argument list too long}}
-{{dsc macro const | EACCES           | nolink=true| notes={{mark c++11}}| Permission denied}}
+{{dsc macro const|EACCES          |nolink=true|notes={{mark c++11}}|Permission denied}}
-{{dsc macro const | EADDRINUSE       | nolink=true| notes={{mark c++11}}| Address in use}}
+{{dsc macro const|EADDRINUSE      |nolink=true|notes={{mark c++11}}|Address in use}}
-{{dsc macro const | EADDRNOTAVAIL    | nolink=true| notes={{mark c++11}}| Address not available}}
+{{dsc macro const|EADDRNOTAVAIL   |nolink=true|notes={{mark c++11}}|Address not available}}
-{{dsc macro const | EAFNOSUPPORT     | nolink=true| notes={{mark c++11}}| Address family not supported}}
+{{dsc macro const|EAFNOSUPPORT    |nolink=true|notes={{mark c++11}}|Address family not supported}}
-{{dsc macro const | EAGAIN           | nolink=true| notes={{mark c++11}}| Resource unavailable, try again}}
+{{dsc macro const|EAGAIN          |nolink=true|notes={{mark c++11}}|Resource unavailable, try again}}
-{{dsc macro const | EALREADY         | nolink=true| notes={{mark c++11}}| Connection already in progress}}
+{{dsc macro const|EALREADY        |nolink=true|notes={{mark c++11}}|Connection already in progress}}
-{{dsc macro const | EBADF            | nolink=true| notes={{mark c++11}}| Bad file descriptor}}
+{{dsc macro const|EBADF           |nolink=true|notes={{mark c++11}}|Bad file descriptor}}
-{{dsc macro const | EBADMSG          | nolink=true| notes={{mark c++11}}| Bad message}}
+{{dsc macro const|EBADMSG         |nolink=true|notes={{mark c++11}}|Bad message}}
-{{dsc macro const | EBUSY            | nolink=true| notes={{mark c++11}}| Device or resource busy}}
+{{dsc macro const|EBUSY           |nolink=true|notes={{mark c++11}}|Device or resource busy}}
-{{dsc macro const | ECANCELED        | nolink=true| notes={{mark c++11}}| Operation canceled}}
+{{dsc macro const|ECANCELED       |nolink=true|notes={{mark c++11}}|Operation canceled}}
-{{dsc macro const | ECHILD           | nolink=true| notes={{mark c++11}}| No child processes}}
+{{dsc macro const|ECHILD          |nolink=true|notes={{mark c++11}}|No child processes}}
-{{dsc macro const | ECONNABORTED     | nolink=true| notes={{mark c++11}}| Connection aborted}}
+{{dsc macro const|ECONNABORTED    |nolink=true|notes={{mark c++11}}|Connection aborted}}
-{{dsc macro const | ECONNREFUSED     | nolink=true| notes={{mark c++11}}| Connection refused}}
+{{dsc macro const|ECONNREFUSED    |nolink=true|notes={{mark c++11}}|Connection refused}}
-{{dsc macro const | ECONNRESET       | nolink=true| notes={{mark c++11}}| Connection reset}}
+{{dsc macro const|ECONNRESET      |nolink=true|notes={{mark c++11}}|Connection reset}}
-{{dsc macro const | EDEADLK          | nolink=true| notes={{mark c++11}}| Resource deadlock would occur}}
+{{dsc macro const|EDEADLK         |nolink=true|notes={{mark c++11}}|Resource deadlock would occur}}
-{{dsc macro const | EDESTADDRREQ     | nolink=true| notes={{mark c++11}}| Destination address required}}
+{{dsc macro const|EDESTADDRREQ    |nolink=true|notes={{mark c++11}}|Destination address required}}
-{{dsc macro const | EDOM             | nolink=true                      | Mathematics argument out of domain of function}}
+{{dsc macro const|EDOM            |nolink=true                     |Mathematics argument out of domain of function}}
-{{dsc macro const | EEXIST           | nolink=true| notes={{mark c++11}}| File exists}}
+{{dsc macro const|EEXIST          |nolink=true|notes={{mark c++11}}|File exists}}
-{{dsc macro const | EFAULT           | nolink=true| notes={{mark c++11}}| Bad address}}
+{{dsc macro const|EFAULT          |nolink=true|notes={{mark c++11}}|Bad address}}
-{{dsc macro const | EFBIG            | nolink=true| notes={{mark c++11}}| File too large}}
+{{dsc macro const|EFBIG           |nolink=true|notes={{mark c++11}}|File too large}}
-{{dsc macro const | EHOSTUNREACH     | nolink=true| notes={{mark c++11}}| Host is unreachable}}
+{{dsc macro const|EHOSTUNREACH    |nolink=true|notes={{mark c++11}}|Host is unreachable}}
-{{dsc macro const | EIDRM            | nolink=true| notes={{mark c++11}}| Identifier removed}}
+{{dsc macro const|EIDRM           |nolink=true|notes={{mark c++11}}|Identifier removed}}
-{{dsc macro const | EILSEQ           | nolink=true| notes={{mark c++11}}| Illegal byte sequence}}
+{{dsc macro const|EILSEQ          |nolink=true                     |Illegal byte sequence}}
-{{dsc macro const | EINPROGRESS      | nolink=true| notes={{mark c++11}}| Operation in progress}}
+{{dsc macro const|EINPROGRESS     |nolink=true|notes={{mark c++11}}|Operation in progress}}
-{{dsc macro const | EINTR            | nolink=true| notes={{mark c++11}}| Interrupted function}}
+{{dsc macro const|EINTR           |nolink=true|notes={{mark c++11}}|Interrupted function}}
-{{dsc macro const | EINVAL           | nolink=true| notes={{mark c++11}}| Invalid argument}}
+{{dsc macro const|EINVAL          |nolink=true|notes={{mark c++11}}|Invalid argument}}
-{{dsc macro const | EIO              | nolink=true| notes={{mark c++11}}| I/O error}}
+{{dsc macro const|EIO             |nolink=true|notes={{mark c++11}}|I/O error}}
-{{dsc macro const | EISCONN          | nolink=true| notes={{mark c++11}}| Socket is connected}}
+{{dsc macro const|EISCONN         |nolink=true|notes={{mark c++11}}|Socket is connected}}
-{{dsc macro const | EISDIR           | nolink=true| notes={{mark c++11}}| Is a directory}}
+{{dsc macro const|EISDIR          |nolink=true|notes={{mark c++11}}|Is a directory}}
-{{dsc macro const | ELOOP            | nolink=true| notes={{mark c++11}}| Too many levels of symbolic links}}
+{{dsc macro const|ELOOP           |nolink=true|notes={{mark c++11}}|Too many levels of symbolic links}}
-{{dsc macro const | EMFILE           | nolink=true| notes={{mark c++11}}| File descriptor value too large}}
+{{dsc macro const|EMFILE          |nolink=true|notes={{mark c++11}}|File descriptor value too large}}
-{{dsc macro const | EMLINK           | nolink=true| notes={{mark c++11}}| Too many links}}
+{{dsc macro const|EMLINK          |nolink=true|notes={{mark c++11}}|Too many links}}
-{{dsc macro const | EMSGSIZE         | nolink=true| notes={{mark c++11}}| Message too large}}
+{{dsc macro const|EMSGSIZE        |nolink=true|notes={{mark c++11}}|Message too large}}
-{{dsc macro const | ENAMETOOLONG     | nolink=true| notes={{mark c++11}}| Filename too long}}
+{{dsc macro const|ENAMETOOLONG    |nolink=true|notes={{mark c++11}}|Filename too long}}
-{{dsc macro const | ENETDOWN         | nolink=true| notes={{mark c++11}}| Network is down}}
+{{dsc macro const|ENETDOWN        |nolink=true|notes={{mark c++11}}|Network is down}}
-{{dsc macro const | ENETRESET        | nolink=true| notes={{mark c++11}}| Connection aborted by network}}
+{{dsc macro const|ENETRESET       |nolink=true|notes={{mark c++11}}|Connection aborted by network}}
-{{dsc macro const | ENETUNREACH      | nolink=true| notes={{mark c++11}}| Network unreachable}}
+{{dsc macro const|ENETUNREACH     |nolink=true|notes={{mark c++11}}|Network unreachable}}
-{{dsc macro const | ENFILE           | nolink=true| notes={{mark c++11}}| Too many files open in system}}
+{{dsc macro const|ENFILE          |nolink=true|notes={{mark c++11}}|Too many files open in system}}
-{{dsc macro const | ENOBUFS          | nolink=true| notes={{mark c++11}}| No buffer space available}}
+{{dsc macro const|ENOBUFS         |nolink=true|notes={{mark c++11}}|No buffer space available}}
-{{dsc macro const | ENODATA          | nolink=true| notes={{mark c++11}}| No message is available on the STREAM head read queue}}
+{{dsc macro const|ENODATA         |nolink=true|notes={{mark c++11}} {{mark deprecated c++23}}|No message is available on the STREAM head read queue}}
-{{dsc macro const | ENODEV           | nolink=true| notes={{mark c++11}}| No such device}}
+{{dsc macro const|ENODEV          |nolink=true|notes={{mark c++11}}|No such device}}
-{{dsc macro const | ENOENT           | nolink=true| notes={{mark c++11}}| No such file or directory}}
+{{dsc macro const|ENOENT          |nolink=true|notes={{mark c++11}}|No such file or directory}}
-{{dsc macro const | ENOEXEC          | nolink=true| notes={{mark c++11}}| Executable file format error}}
+{{dsc macro const|ENOEXEC         |nolink=true|notes={{mark c++11}}|Executable file format error}}
-{{dsc macro const | ENOLCK           | nolink=true| notes={{mark c++11}}| No locks available}}
+{{dsc macro const|ENOLCK          |nolink=true|notes={{mark c++11}}|No locks available}}
-{{dsc macro const | ENOLINK          | nolink=true| notes={{mark c++11}}| Link has been severed}}
+{{dsc macro const|ENOLINK         |nolink=true|notes={{mark c++11}}|Link has been severed}}
-{{dsc macro const | ENOMEM           | nolink=true| notes={{mark c++11}}| Not enough space}}
+{{dsc macro const|ENOMEM          |nolink=true|notes={{mark c++11}}|Not enough space}}
-{{dsc macro const | ENOMSG           | nolink=true| notes={{mark c++11}}| No message of the desired type}}
+{{dsc macro const|ENOMSG          |nolink=true|notes={{mark c++11}}|No message of the desired type}}
-{{dsc macro const | ENOPROTOOPT      | nolink=true| notes={{mark c++11}}| Protocol not available}}
+{{dsc macro const|ENOPROTOOPT     |nolink=true|notes={{mark c++11}}|Protocol not available}}
-{{dsc macro const | ENOSPC           | nolink=true| notes={{mark c++11}}| No space left on device}}
+{{dsc macro const|ENOSPC          |nolink=true|notes={{mark c++11}}|No space left on device}}
-{{dsc macro const | ENOSR            | nolink=true| notes={{mark c++11}}| No STREAM resources}}
+{{dsc macro const|ENOSR           |nolink=true|notes={{mark c++11}} {{mark deprecated c++23}}|No STREAM resources}}
-{{dsc macro const | ENOSTR           | nolink=true| notes={{mark c++11}}| Not a STREAM}}
+{{dsc macro const|ENOSTR          |nolink=true|notes={{mark c++11}} {{mark deprecated c++23}}|Not a STREAM}}
-{{dsc macro const | ENOSYS           | nolink=true| notes={{mark c++11}}| Function not supported}}
+{{dsc macro const|ENOSYS          |nolink=true|notes={{mark c++11}}|Function not supported}}
-{{dsc macro const | ENOTCONN         | nolink=true| notes={{mark c++11}}| The socket is not connected}}
+{{dsc macro const|ENOTCONN        |nolink=true|notes={{mark c++11}}|The socket is not connected}}
-{{dsc macro const | ENOTDIR          | nolink=true| notes={{mark c++11}}| Not a directory}}
+{{dsc macro const|ENOTDIR         |nolink=true|notes={{mark c++11}}|Not a directory}}
-{{dsc macro const | ENOTEMPTY        | nolink=true| notes={{mark c++11}}| Directory not empty}}
+{{dsc macro const|ENOTEMPTY       |nolink=true|notes={{mark c++11}}|Directory not empty}}
-{{dsc macro const | ENOTRECOVERABLE  | nolink=true| notes={{mark c++11}}| State not recoverable}}
+{{dsc macro const|ENOTRECOVERABLE |nolink=true|notes={{mark c++11}}|State not recoverable}}
-{{dsc macro const | ENOTSOCK         | nolink=true| notes={{mark c++11}}| Not a socket}}
+{{dsc macro const|ENOTSOCK        |nolink=true|notes={{mark c++11}}|Not a socket}}
-{{dsc macro const | ENOTSUP          | nolink=true| notes={{mark c++11}}| Not supported}}
+{{dsc macro const|ENOTSUP         |nolink=true|notes={{mark c++11}}|Not supported}}
-{{dsc macro const | ENOTTY           | nolink=true| notes={{mark c++11}}| Inappropriate I/O control operation}}
+{{dsc macro const|ENOTTY          |nolink=true|notes={{mark c++11}}|Inappropriate I/O control operation}}
-{{dsc macro const | ENXIO            | nolink=true| notes={{mark c++11}}| No such device or address}}
+{{dsc macro const|ENXIO           |nolink=true|notes={{mark c++11}}|No such device or address}}
-{{dsc macro const | EOPNOTSUPP       | nolink=true| notes={{mark c++11}}| Operation not supported on socket}}
+{{dsc macro const|EOPNOTSUPP      |nolink=true|notes={{mark c++11}}|Operation not supported on socket}}
-{{dsc macro const | EOVERFLOW        | nolink=true| notes={{mark c++11}}| Value too large to be stored in data type}}
+{{dsc macro const|EOVERFLOW       |nolink=true|notes={{mark c++11}}|Value too large to be stored in data type}}
-{{dsc macro const | EOWNERDEAD       | nolink=true| notes={{mark c++11}}| Previous owner died}}
+{{dsc macro const|EOWNERDEAD      |nolink=true|notes={{mark c++11}}|Previous owner died}}
-{{dsc macro const | EPERM            | nolink=true| notes={{mark c++11}}| Operation not permitted}}
+{{dsc macro const|EPERM           |nolink=true|notes={{mark c++11}}|Operation not permitted}}
-{{dsc macro const | EPIPE            | nolink=true| notes={{mark c++11}}| Broken pipe}}
+{{dsc macro const|EPIPE           |nolink=true|notes={{mark c++11}}|Broken pipe}}
-{{dsc macro const | EPROTO           | nolink=true| notes={{mark c++11}}| Protocol error}}
+{{dsc macro const|EPROTO          |nolink=true|notes={{mark c++11}}|Protocol error}}
-{{dsc macro const | EPROTONOSUPPORT  | nolink=true| notes={{mark c++11}}| Protocol not supported}}
+{{dsc macro const|EPROTONOSUPPORT |nolink=true|notes={{mark c++11}}|Protocol not supported}}
-{{dsc macro const | EPROTOTYPE       | nolink=true| notes={{mark c++11}}| Protocol wrong type for socket}}
+{{dsc macro const|EPROTOTYPE      |nolink=true|notes={{mark c++11}}|Protocol wrong type for socket}}
-{{dsc macro const | ERANGE           | nolink=true|                       Result too large}}
+{{dsc macro const|ERANGE          |nolink=true|                     Result too large}}
-{{dsc macro const | EROFS            | nolink=true| notes={{mark c++11}}| Read-only file system}}
+{{dsc macro const|EROFS           |nolink=true|notes={{mark c++11}}|Read-only file system}}
-{{dsc macro const | ESPIPE           | nolink=true| notes={{mark c++11}}| Invalid seek}}
+{{dsc macro const|ESPIPE          |nolink=true|notes={{mark c++11}}|Invalid seek}}
-{{dsc macro const | ESRCH            | nolink=true| notes={{mark c++11}}| No such process}}
+{{dsc macro const|ESRCH           |nolink=true|notes={{mark c++11}}|No such process}}
-{{dsc macro const | ETIME            | nolink=true| notes={{mark c++11}}| Stream ioctl() timeout}}
+{{dsc macro const|ETIME           |nolink=true|notes={{mark c++11}} {{mark deprecated c++23}}|Stream {{tt|ioctl()}} timeout}}
-{{dsc macro const | ETIMEDOUT        | nolink=true| notes={{mark c++11}}| Connection timed out}}
+{{dsc macro const|ETIMEDOUT       |nolink=true|notes={{mark c++11}}|Connection timed out}}
-{{dsc macro const | ETXTBSY          | nolink=true| notes={{mark c++11}}| Text file busy}}
+{{dsc macro const|ETXTBSY         |nolink=true|notes={{mark c++11}}|Text file busy}}
-{{dsc macro const | EWOULDBLOCK      | nolink=true| notes={{mark c++11}}| Operation would block}}
+{{dsc macro const|EWOULDBLOCK     |nolink=true|notes={{mark c++11}}|Operation would block}}
-{{dsc macro const | EXDEV            | nolink=true| notes={{mark c++11}}| Cross-device link}}
+{{dsc macro const|EXDEV           |nolink=true|notes={{mark c++11}}|Cross-device link}}
 {{dsc end}}
+===Notes===
+Although the header {{tt|<cerrno>}} is based on the C standard library header {{header|errno.h|lang=c}}, the majority of the macros defined by {{tt|<cerrno>}} were adopted by C++ from the POSIX standard, rather than the C standard library.
-===See Also===
+===Synopsis===
-* [[cpp/error/errno_macros|Description for the error number values]]
+{{source|
+#define errno /* see description */
+#define E2BIG /* see description */           // freestanding
+#define EACCES /* see description */          // freestanding
+#define EADDRINUSE /* see description */      // freestanding
+#define EADDRNOTAVAIL /* see description */   // freestanding
+#define EAFNOSUPPORT /* see description */    // freestanding
+#define EAGAIN /* see description */          // freestanding
+#define EALREADY /* see description */        // freestanding
+#define EBADF /* see description */           // freestanding
+#define EBADMSG /* see description */         // freestanding
+#define EBUSY /* see description */           // freestanding
+#define ECANCELED /* see description */       // freestanding
+#define ECHILD /* see description */          // freestanding
+#define ECONNABORTED /* see description */    // freestanding
+#define ECONNREFUSED /* see description */    // freestanding
+#define ECONNRESET /* see description */      // freestanding
+#define EDEADLK /* see description */         // freestanding
+#define EDESTADDRREQ /* see description */    // freestanding
+#define EDOM /* see description */            // freestanding
+#define EEXIST /* see description */          // freestanding
+#define EFAULT /* see description */          // freestanding
+#define EFBIG /* see description */           // freestanding
+#define EHOSTUNREACH /* see description */    // freestanding
+#define EIDRM /* see description */           // freestanding
+#define EILSEQ /* see description */          // freestanding
+#define EINPROGRESS /* see description */     // freestanding
+#define EINTR /* see description */           // freestanding
+#define EINVAL /* see description */          // freestanding
+#define EIO /* see description */             // freestanding
+#define EISCONN /* see description */         // freestanding
+#define EISDIR /* see description */          // freestanding
+#define ELOOP /* see description */           // freestanding
+#define EMFILE /* see description */          // freestanding
+#define EMLINK /* see description */          // freestanding
+#define EMSGSIZE /* see description */        // freestanding
+#define ENAMETOOLONG /* see description */    // freestanding
+#define ENETDOWN /* see description */        // freestanding
+#define ENETRESET /* see description */       // freestanding
+#define ENETUNREACH /* see description */     // freestanding
+#define ENFILE /* see description */          // freestanding
+#define ENOBUFS /* see description */         // freestanding
+#define ENODEV /* see description */          // freestanding
+#define ENOENT /* see description */          // freestanding
+#define ENOEXEC /* see description */         // freestanding
+#define ENOLCK /* see description */          // freestanding
+#define ENOLINK /* see description */         // freestanding
+#define ENOMEM /* see description */          // freestanding
+#define ENOMSG /* see description */          // freestanding
+#define ENOPROTOOPT /* see description */     // freestanding
+#define ENOSPC /* see description */          // freestanding
+#define ENOSYS /* see description */          // freestanding
+#define ENOTCONN /* see description */        // freestanding
+#define ENOTDIR /* see description */         // freestanding
+#define ENOTEMPTY /* see description */       // freestanding
+#define ENOTRECOVERABLE /* see description */ // freestanding
+#define ENOTSOCK /* see description */        // freestanding
+#define ENOTSUP /* see description */         // freestanding
+#define ENOTTY /* see description */          // freestanding
+#define ENXIO /* see description */           // freestanding
+#define EOPNOTSUPP /* see description */      // freestanding
+#define EOVERFLOW /* see description */       // freestanding
+#define EOWNERDEAD /* see description */      // freestanding
+#define EPERM /* see description */           // freestanding
+#define EPIPE /* see description */           // freestanding
+#define EPROTO /* see description */          // freestanding
+#define EPROTONOSUPPORT /* see description */ // freestanding
+#define EPROTOTYPE /* see description */      // freestanding
+#define ERANGE /* see description */          // freestanding
+#define EROFS /* see description */           // freestanding
+#define ESPIPE /* see description */          // freestanding
+#define ESRCH /* see description */           // freestanding
+#define ETIMEDOUT /* see description */       // freestanding
+#define ETXTBSY /* see description */         // freestanding
+#define EWOULDBLOCK /* see description */     // freestanding
+#define EXDEV /* see description */           // freestanding
+}}
+===Defect reports===
+{{dr list begin}}
+{{dr list item|wg=lwg|dr=288|std=C++98|before=the macro {{tt|EILSEQ}} was not defined in {{tt|<cerrno>}}|after=defined}}
+{{dr list end}}
+===See also===
+* [[cpp/error/errno macros|Description for the error number values]]
+{{langlinks|es|ja|ru|zh}}

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Difference between revisions of "cpp/header/cerrno"

Latest revision as of 01:02, 13 September 2023

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