The functions error's numbers are standarized - but the error messages are not.
The errors are often handled with unclear error messages, so why not use an errno standarized messages.
Advantages: - This could decrease the binary size. - Appended with a detailed information, the error message will be clear.
This commit introduces new function: - const char *errno_to_str(int errno)
The functions returns a pointer to the errno corresponding text message: - if errno is null or positive number - a pointer to "Success" message - if errno is negative - a pointer to errno related message
Signed-off-by: Przemyslaw Marczak p.marczak@samsung.com --- include/errno.h | 3 ++ lib/Makefile | 1 + lib/errno_str.c | 147 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 151 insertions(+) create mode 100644 lib/errno_str.c
diff --git a/include/errno.h b/include/errno.h index e24a33b..14ac3cb 100644 --- a/include/errno.h +++ b/include/errno.h @@ -6,4 +6,7 @@ extern int errno;
#define __set_errno(val) do { errno = val; } while (0)
+#ifdef CONFIG_ERRNO_STR +const char *errno_str(int errno); +#endif #endif /* _ERRNO_H */ diff --git a/lib/Makefile b/lib/Makefile index 320197a..6bb2e9b 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -53,6 +53,7 @@ endif obj-$(CONFIG_ADDR_MAP) += addr_map.o obj-y += hashtable.o obj-y += errno.o +obj-$(CONFIG_ERRNO_STR) += errno_str.o obj-y += display_options.o obj-$(CONFIG_BCH) += bch.o obj-y += crc32.o diff --git a/lib/errno_str.c b/lib/errno_str.c new file mode 100644 index 0000000..0ba950e --- /dev/null +++ b/lib/errno_str.c @@ -0,0 +1,147 @@ +/* + * Copyright (C) 2014 Samsung Electronics + * Przemyslaw Marczak p.marczak@samsung.com + * + * SDPX-License-Identifier: GPL-2.0+ + */ +#include <common.h> +#include <errno.h> + +#define ERRNO_MSG(errno, msg) msg +#define SAME_AS(x) (const char *)&errno_message[x] + +static const char * const errno_message[] = { + ERRNO_MSG(0, "Success"), + ERRNO_MSG(EPERM, "Operation not permitted"), + ERRNO_MSG(ENOEN, "No such file or directory"), + ERRNO_MSG(ESRCH, "No such process"), + ERRNO_MSG(EINTR, "Interrupted system call"), + ERRNO_MSG(EIO, "I/O error"), + ERRNO_MSG(ENXIO, "No such device or address"), + ERRNO_MSG(E2BIG, "Argument list too long"), + ERRNO_MSG(ENOEXEC, "Exec format error"), + ERRNO_MSG(EBADF, "Bad file number"), + ERRNO_MSG(ECHILD, "No child processes"), + ERRNO_MSG(EAGAIN, "Try again"), + ERRNO_MSG(ENOMEM, "Out of memory"), + ERRNO_MSG(EACCES, "Permission denied"), + ERRNO_MSG(EFAULT, "Bad address"), + ERRNO_MSG(ENOTBL, "Block device required"), + ERRNO_MSG(EBUSY, "Device or resource busy"), + ERRNO_MSG(EEXIST, "File exists"), + ERRNO_MSG(EXDEV, "Cross-device link"), + ERRNO_MSG(ENODEV, "No such device"), + ERRNO_MSG(ENOTDIR, "Not a directory"), + ERRNO_MSG(EISDIR, "Is a directory"), + ERRNO_MSG(EINVAL, "Invalid argument"), + ERRNO_MSG(ENFILE, "File table overflow"), + ERRNO_MSG(EMFILE, "Too many open files"), + ERRNO_MSG(ENOTTY, "Not a typewriter"), + ERRNO_MSG(ETXTBSY, "Text file busy"), + ERRNO_MSG(EFBIG, "File too large"), + ERRNO_MSG(ENOSPC, "No space left on device"), + ERRNO_MSG(ESPIPE, "Illegal seek"), + ERRNO_MSG(EROFS, "Read-only file system"), + ERRNO_MSG(EMLINK, "Too many links"), + ERRNO_MSG(EPIPE, "Broken pipe"), + ERRNO_MSG(EDOM, "Math argument out of domain of func"), + ERRNO_MSG(ERANGE, "Math result not representable"), + ERRNO_MSG(EDEADLK, "Resource deadlock would occur"), + ERRNO_MSG(ENAMETOOLONG, "File name too long"), + ERRNO_MSG(ENOLCK, "No record locks available"), + ERRNO_MSG(ENOSYS, "Function not implemented"), + ERRNO_MSG(ENOTEMPTY, "Directory not empty"), + ERRNO_MSG(ELOOP, "Too many symbolic links encountered"), + ERRNO_MSG(EWOULDBLOCK, SAME_AS(EAGAIN)), + ERRNO_MSG(ENOMSG, "No message of desired type"), + ERRNO_MSG(EIDRM, "Identifier removed"), + ERRNO_MSG(ECHRNG, "Channel number out of range"), + ERRNO_MSG(EL2NSYNC, "Level 2 not synchronized"), + ERRNO_MSG(EL3HLT, "Level 3 halted"), + ERRNO_MSG(EL3RST, "Level 3 reset"), + ERRNO_MSG(ELNRNG, "Link number out of range"), + ERRNO_MSG(EUNATCH, "Protocol driver not attached"), + ERRNO_MSG(ENOCSI, "No CSI structure available"), + ERRNO_MSG(EL2HLT, "Level 2 halted"), + ERRNO_MSG(EBADE, "Invalid exchange"), + ERRNO_MSG(EBADR, "Invalid request descriptor"), + ERRNO_MSG(EXFULL, "Exchange full"), + ERRNO_MSG(ENOANO, "No anode"), + ERRNO_MSG(EBADRQC, "Invalid request code"), + ERRNO_MSG(EBADSLT, "Invalid slot"), + ERRNO_MSG(EDEADLOCK, SAME_AS(EDEADLK)), + ERRNO_MSG(EBFONT, "Bad font file format"), + ERRNO_MSG(ENOSTR, "Device not a stream"), + ERRNO_MSG(ENODATA, "No data available"), + ERRNO_MSG(ETIME, "Timer expired"), + ERRNO_MSG(ENOSR, "Out of streams resources"), + ERRNO_MSG(ENONET, "Machine is not on the network"), + ERRNO_MSG(ENOPKG, "Package not installed"), + ERRNO_MSG(EREMOTE, "Object is remote"), + ERRNO_MSG(ENOLINK, "Link has been severed"), + ERRNO_MSG(EADV, "Advertise error"), + ERRNO_MSG(ESRMNT, "Srmount error"), + ERRNO_MSG(ECOMM, "Communication error on send"), + ERRNO_MSG(EPROTO, "Protocol error"), + ERRNO_MSG(EMULTIHOP, "Multihop attempted"), + ERRNO_MSG(EDOTDOT, "RFS specific error"), + ERRNO_MSG(EBADMSG, "Not a data message"), + ERRNO_MSG(EOVERFLOW, "Value too large for defined data type"), + ERRNO_MSG(ENOTUNIQ, "Name not unique on network"), + ERRNO_MSG(EBADFD, "File descriptor in bad state"), + ERRNO_MSG(EREMCHG, "Remote address changed"), + ERRNO_MSG(ELIBACC, "Can not access a needed shared library"), + ERRNO_MSG(ELIBBAD, "Accessing a corrupted shared library"), + ERRNO_MSG(ELIBSCN, ".lib section in a.out corrupted"), + ERRNO_MSG(ELIBMAX, "Attempting to link in too many shared libraries"), + ERRNO_MSG(ELIBEXEC, "Cannot exec a shared library directly"), + ERRNO_MSG(EILSEQ, "Illegal byte sequence"), + ERRNO_MSG(ERESTART, "Interrupted system call should be restarted"), + ERRNO_MSG(ESTRPIPE, "Streams pipe error"), + ERRNO_MSG(EUSERS, "Too many users"), + ERRNO_MSG(ENOTSOCK, "Socket operation on non-socket"), + ERRNO_MSG(EDESTADDRREQ, "Destination address required"), + ERRNO_MSG(EMSGSIZE, "Message too long"), + ERRNO_MSG(EPROTOTYPE, "Protocol wrong type for socket"), + ERRNO_MSG(ENOPROTOOPT, "Protocol not available"), + ERRNO_MSG(EPROTONOSUPPORT, "Protocol not supported"), + ERRNO_MSG(ESOCKTNOSUPPORT, "Socket type not supported"), + ERRNO_MSG(EOPNOTSUPP, "Operation not supported on transport endpoint"), + ERRNO_MSG(EPFNOSUPPORT, "Protocol family not supported"), + ERRNO_MSG(AFNOSUPPORT, "Address family not supported by protocol"), + ERRNO_MSG(EADDRINUSE, "Address already in use"), + ERRNO_MSG(EADDRNOTAVAIL, "Cannot assign requested address"), + ERRNO_MSG(ENETDOWN, "Network is down"), + ERRNO_MSG(ENETUNREACH, "Network is unreachable"), + ERRNO_MSG(ENETRESET, "Network dropped connection because of reset"), + ERRNO_MSG(ECONNABORTED, "Software caused connection abort"), + ERRNO_MSG(ECONNRESET, "Connection reset by peer"), + ERRNO_MSG(ENOBUFS, "No buffer space available"), + ERRNO_MSG(EISCONN, "Transport endpoint is already connected"), + ERRNO_MSG(ENOTCONN, "Transport endpoint is not connected"), + ERRNO_MSG(ESHUTDOWN, "Cannot send after transport endpoint shutdown"), + ERRNO_MSG(ETOOMANYREFS, "Too many references: cannot splice"), + ERRNO_MSG(ETIMEDOUT, "Connection timed out"), + ERRNO_MSG(ECONNREFUSED, "Connection refused"), + ERRNO_MSG(EHOSTDOWN, "Host is down"), + ERRNO_MSG(EHOSTUNREACH, "No route to host"), + ERRNO_MSG(EALREADY, "Operation already in progress"), + ERRNO_MSG(EINPROGRESS, "Operation now in progress"), + ERRNO_MSG(ESTALE, "Stale NFS file handle"), + ERRNO_MSG(EUCLEAN, "Structure needs cleaning"), + ERRNO_MSG(ENOTNAM, "Not a XENIX named type file"), + ERRNO_MSG(ENAVAIL, "No XENIX semaphores available"), + ERRNO_MSG(EISNAM, "Is a named type file"), + ERRNO_MSG(EREMOTEIO, "Remote I/O error"), + ERRNO_MSG(EDQUOT, "Quota exceeded"), + ERRNO_MSG(ENOMEDIUM, "No medium found"), + ERRNO_MSG(EMEDIUMTYPE, "Wrong medium type"), +}; + +const char *errno_str(int errno) +{ + if (errno >= 0) + return errno_message[0]; + + return errno_message[abs(errno)]; +}