open()打开文件失败对应的各种错误码
open()打开文件失败对应的各种错误码
open()打开文件失败错误码：
获取错误信息实例：
HANDLE hFile = 0;
hFile = open(“c:\test.txt”, O_RDWR, S_IRWXU|S_IRWXG|S_IRWXO);
if (-1 == hFile)
{
printf("Error %d: Failed to open file\n", errno);
if (errno == EEXIST )
{
printf("EEXIST 参数pathname 所指的文件已存在, 却使用了O_CREAT 和O_EXCL 旗标. \r\n");
}else if(errno == EACCES)
{
printf("EACCESS 参数pathname 所指的文件不符合所要求测试的权限.\r\n");
}else if(errno == EROFS)
{
printf("EROFS 欲测试写入权限的文件存在于只读文件系统内.\r\n");
}else ......
}
注：使用errno 需要加上头文件：
#include
#define EPERM 1 /* Operation not permitted */
#define ENOENT 2 /* No such file or directory */
#define ESRCH 3 /* No such process */
#define EINTR 4 /* Interrupted system call */
#define EIO 5 /* Input/output error */
#define ENXIO 6 /* Device not configured */
#define E2BIG 7 /* Argument list too long */
#define ENOEXEC 8 /* Exec format error */
#define EBADF 9 /* Bad file descriptor */
#define ECHILD 10 /* No child processes */
#define EDEADLK 11 /* Resource deadlock avoided */
/* 11 was EAGAIN */
#define ENOMEM 12 /* Cannot allocate memory */
#define EACCES 13 /* Permission denied */
#define EFAULT 14 /* Bad address */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define ENOTBLK 15 /* Block device required */
#endif
#define EBUSY 16 /* Device / Resource busy */
#define EEXIST 17 /* File exists */
#define EXDEV 18 /* Cross-device link */
#define ENODEV 19 /* Operation not supported by device */
#define ENOTDIR 20 /* Not a directory */
#define EISDIR 21 /* Is a directory */
#define EINVAL 22 /* Invalid argument */
#define ENFILE 23 /* Too many open files in system */
#define EMFILE 24 /* Too many open files */
#define ENOTTY 25 /* Inappropriate ioctl for device */
#define ETXTBSY 26 /* Text file busy */
#define EFBIG 27 /* File too large */
#define ENOSPC 28 /* No space left on device */
#define ESPIPE 29 /* Illegal seek */
#define EROFS 30 /* Read-only file system */
#define EMLINK 31 /* Too many links */
#define EPIPE 32 /* Broken pipe */
/* math software */
#define EDOM 33 /* Numerical argument out of domain */
#define ERANGE 34 /* Result too large */
/* non-blocking and interrupt i/o */
#define EAGAIN 35 /* Resource temporarily unavailable */
#define EWOULDBLOCK EAGAIN /* Operation would block */
#define EINPROGRESS 36 /* Operation now in progress */
#define EALREADY 37 /* Operation already in progress */
/* ipc/network software -- argument errors */
#define ENOTSOCK 38 /* Socket operation on non-socket */
#define EDESTADDRREQ 39 /* Destination address required */
#define EMSGSIZE 40 /* Message too long */
#define EPROTOTYPE 41 /* Protocol wrong type for socket */
#define ENOPROTOOPT 42 /* Protocol not available */
#define EPROTONOSUPPORT 43 /* Protocol not supported */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define ESOCKTNOSUPPORT 44 /* Socket type not supported */
#endif
#define ENOTSUP 45 /* Operation not supported */
#define EPFNOSUPPORT 46 /* Protocol family not supported */
#endif
#define EAFNOSUPPORT 47 /* Address family not supported by protocol family */
#define EADDRINUSE 48 /* Address already in use */
#define EADDRNOTAVAIL 49 /* Can't assign requested address */
/* ipc/network software -- operational errors */
#define ENETDOWN 50 /* Network is down */
#define ENETUNREACH 51 /* Network is unreachable */
#define ENETRESET 52 /* Network dropped connection on reset */
#define ECONNABORTED 53 /* Software caused connection abort */
#define ECONNRESET 54 /* Connection reset by peer */
#define ENOBUFS 55 /* No buffer space available */
#define EISCONN 56 /* Socket is already connected */
#define ENOTCONN 57 /* Socket is not connected */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define ESHUTDOWN 58 /* Can't send after socket shutdown */
#define ETOOMANYREFS 59 /* Too many references: can't splice */
#endif
#define ETIMEDOUT 60 /* Operation timed out */
#define ECONNREFUSED 61 /* Connection refused */
#define ELOOP 62 /* Too many levels of symbolic links */
#define ENAMETOOLONG 63 /* File name too long */
/* should be rearranged */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EHOSTDOWN 64 /* Host is down */
#endif
#define EHOSTUNREACH 65 /* No route to host */
#define ENOTEMPTY 66 /* Directory not empty */
/* quotas & mush */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EPROCLIM 67 /* Too many processes */
#define EUSERS 68 /* Too many users */
#endif
#define EDQUOT 69 /* Disc quota exceeded */
/* Network File System */
#define ESTALE 70 /* Stale NFS file handle */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EREMOTE 71 /* Too many levels of remote in path */
#define EBADRPC 72 /* RPC struct is bad */
#define ERPCMISMATCH 73 /* RPC version wrong */
#define EPROGUNAVAIL 74 /* RPC prog. not avail */
#define EPROGMISMATCH 75 /* Program version wrong */
#define EPROCUNAVAIL 76 /* Bad procedure for program */
#endif
#define ENOLCK 77 /* No locks available */
#define ENOSYS 78 /* Function not implemented */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EFTYPE 79 /* Inappropriate file type or format */
#define EAUTH 80 /* Authentication error */
#define ENEEDAUTH 81 /* Need authenticator */
/* Intelligent device errors */
#define EPWROFF 82 /* Device power is off */
#define EDEVERR 83 /* Device error, e.g. paper out */
#endif
#define EOVERFLOW 84 /* Value too large to be stored in data type */
/* Program loading errors */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EBADEXEC 85 /* Bad executable */
#define EBADARCH 86 /* Bad CPU type in executable */
#define ESHLIBVERS 87 /* Shared library version mismatch */
#define EBADMACHO 88 /* Malformed Macho file */
#endif
#define ECANCELED 89 /* Operation canceled */
#define EIDRM 90 /* Identifier removed */
#define ENOMSG 91 /* No message of desired type */
#define EILSEQ 92 /* Illegal byte sequence */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define ENOATTR 93 /* Attribute not found */
#endif
#define EBADMSG 94 /* Bad message */
#define EMULTIHOP 95 /* Reserved */
#define ENODATA 96 /* No message available on STREAM */
#define ENOLINK 97 /* Reserved */
#define ENOSR 98 /* No STREAM resources */
#define ENOSTR 99 /* Not a STREAM */
#define EPROTO 100 /* Protocol error */
#define ETIME 101 /* STREAM ioctl timeout */
#if __DARWIN_UNIX03 || defined(KERNEL)
/* This value is only discrete when compiling __DARWIN_UNIX03, or KERNEL */
#define EOPNOTSUPP 102 /* Operation not supported on socket */
#endif /* __DARWIN_UNIX03 || KERNEL */
#define ENOPOLICY 103 /* No such policy registered */
#if __DARWIN_C_LEVEL >= 200809L
#define ENOTRECOVERABLE 104 /* State not recoverable */
#define EOWNERDEAD 105 /* Previous owner died */
#endif
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EQFULL 106 /* Interface output queue is full */
#define ELAST 106 /* Must be equal largest errno */
标签: open, errno