strerror：将错误编号转换为字符串

概要

#include <string.h>
char *strerror(int errnum);
```### 描述

strerror 将错误编号 errnum 转换为一个字符串。errnum 的值通常是 errno 的副本。如果 errnum 不是已知的错误编号，则结果指向一个空字符串。

strerror 的此实现会为 `errno.h' 中定义的每个值打印出以下字符串：

E2BIG Arg list too long

EACCES Permission denied

EADV Advertise error

EAGAIN No more processes

EBADF Bad file number

EBADMSG Bad message

EBUSY Device or resource busy

ECHILD No children

ECOMM Communication error

EDEADLK Deadlock

EEXIST File exists

EDOM Math argument

EFAULT Bad address

EFBIG File too large

EIDRM Identifier removed

EINTR Interrupted system call

EINVAL Invalid argument

EIO I/O error

EISDIR Is a directory

ELIBACC Cannot access a needed shared library

ELIBBAD Accessing a corrupted shared library

ELIBEXEC Cannot exec a shared library directly

ELIBMAX Attempting to link in more shared libraries than system limit

ELIBSCN .lib section in a.out corrupted

EMFILE Too many open files

EMLINK Too many links

EMULTIHOP Multihop attempted

ENAMETOOLONG File or path name too long

ENFILE Too many open files in system

ENODEV No such device

ENOENT No such file or directory

ENOEXEC Exec format error

ENOLCK No lock

ENOLINK Virtual circuit is gone

ENOMEM Not enough space

ENOMSG No message of desired type

ENONET Machine is not on the network

ENOPKG No package

ENOSPC No space left on device

ENOSR No stream resources

ENOSTR Not a stream

ENOSYS Function not implemented

ENOTBLK Block device required

ENOTDIR Not a directory

ENOTEMPTY Directory not empty

ENOTTY Not a character device

ENXIO No such device or address

EPERM Not owner

EPIPE Broken pipe

EPROTO Protocol error

ERANGE Result too large

EREMOTE Resource is remote

EROFS Read-only file system

ESPIPE Illegal seek

ESRCH No such process

ESRMNT Srmount error

ETIME Stream ioctl timeout

ETXTBSY Text file busy

EXDEV Cross-device link### 返回值

此函数返回一个指向字符串的指针。您的应用程序不得修改该字符串。

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**权威来源**: BUSMASTER DITA help source `strerror.dita`, compiled into `BUSMASTER.CHM` with the application.