errno: implement strerror
i defo need to check my priorities but i wanted to play around with awk and the errno cli tool so leave me alone
This commit is contained in:
Felix Kopp
parent
c4717d8fce
commit
e79f9d5165
3 changed files with 156 additions and 0 deletions
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@ -138,6 +138,15 @@
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#define ERFKILL 132
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#define EHWPOISON 133
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/**
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* Obtain an error message from the POSIX error number.
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* The returned string must not be modified in any way.
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*
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* @param errnum: POSIX error number
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* @returns an immutable human-readable string briefly describing the error
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*/
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char *strerror(int errnum);
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/* TODO: actually define errno */
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/*
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@ -27,6 +27,7 @@ ARDIX_LIB_PWD := $(PWD)/lib
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ARDIX_SOURCES += \
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$(ARDIX_LIB_PWD)/ctype.c \
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$(ARDIX_LIB_PWD)/errno.c \
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$(ARDIX_LIB_PWD)/list.c \
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$(ARDIX_LIB_PWD)/malloc.c \
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$(ARDIX_LIB_PWD)/string.c \
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146
lib/errno.c
Normal file
146
lib/errno.c
Normal file
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@ -0,0 +1,146 @@
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/* SPDX-License-Identifier: BSD-3-Clause */
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/* See the end of this file for copyright, licensing, and warranty information. */
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#include <ardix/util.h>
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#include <errno.h>
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#include <toolchain.h>
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__rodata static const char *error_messages[] = {
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[EPERM] "Operation not permitted",
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[ENOENT] "No such file or directory",
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[ESRCH] "No such process",
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[EINTR] "Interrupted system call",
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[EIO] "Input/output error",
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[ENXIO] "No such device or address",
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[E2BIG] "Argument list too long",
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[ENOEXEC] "Exec format error",
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[EBADF] "Bad file descriptor",
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[ECHILD] "No child process",
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[EAGAIN] "Resource temporarily unavailable",
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[ENOMEM] "Cannot allocate memory",
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[EACCES] "Permission denied",
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[EFAULT] "Bad address",
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[ENOTBLK] "Block device required",
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[EBUSY] "Device or resource busy",
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[EEXIST] "File exists",
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[EXDEV] "Invalid cross-device link",
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[ENODEV] "No such device",
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[ENOTDIR] "Not a directory",
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[EISDIR] "Is a directory",
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[EINVAL] "Invalid argument",
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[ENFILE] "Too many open files in system",
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[EMFILE] "Too many open files",
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[ENOTTY] "Inappropriate ioctl for device",
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[ETXTBSY] "Text file busy",
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[EFBIG] "File too large",
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[ENOSPC] "No space left on device",
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[ESPIPE] "Illegal seek",
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[EROFS] "Read-only file system",
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[EMLINK] "Too many links",
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[EPIPE] "Broken pipe",
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[EDOM] "Numerical argument out of domain",
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[ERANGE] "Numerical result out of range",
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[EDEADLK] "Resource deadlock avoided",
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[ENAMETOOLONG] "File name too long",
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[ENOLCK] "No locks available",
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[ENOSYS] "Function not implemented",
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[ENOTEMPTY] "Directory not empty",
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[ELOOP] "Too many levels of symbolic links",
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[EWOULDBLOCK] "Resource temporarily unavailable",
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[ENOMSG] "No message of desired type",
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[EIDRM] "Identifier removed",
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[ECHRNG] "Channel number out of range",
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[EL2NSYNC] "Level 2 not synchronized",
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[EL3HLT] "Level 3 halted",
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[EL3RST] "Level 3 reset",
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[ELNRNG] "Link number out of range",
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[EUNATCH] "Protocol driver not attached",
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[ENOCSI] "No CSI structure available",
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[EL2HLT] "Level 2 halted",
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[EBADE] "Invalid exchange",
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[EBADR] "Invalid request descriptor",
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[EXFULL] "Exchange full",
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[ENOANO] "No anode",
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[EBADRQC] "Invalid request code",
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[EBADSLT] "Invalid slot",
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[EDEADLOCK] "Resource deadlock avoided",
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[EBFONT] "Bad font file format",
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[ENOSTR] "Device not a stream",
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[ENODATA] "No data available",
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[ETIME] "Timer expired",
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[ENOSR] "Out of streams resources",
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[ENONET] "Machine is not on the network",
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[ENOPKG] "Package not installed",
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[EREMOTE] "Object is remote",
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[ENOLINK] "Link has been severed",
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[EADV] "Advertise error",
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[ESRMNT] "Srmount error",
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[ECOMM] "Communication error on send",
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[EPROTO] "Protocol error",
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[EMULTIHOP] "Multihop attempted",
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[EDOTDOT] "RFS specific error",
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[EBADMSG] "Bad message",
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[EOVERFLOW] "Value too large for defined data type",
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[ENOTUNIQ] "Name not unique on network",
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[EBADFD] "File descriptor in bad state",
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[EREMCHG] "Remote address changed",
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[ELIBACC] "Can not access a needed shared library",
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[ELIBBAD] "Accessing a corrupted shared library",
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[ELIBSCN] ".lib section in a.out corrupted",
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[ELIBMAX] "Attempting to link in too many shared libraries",
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[ELIBEXEC] "Cannot exec a shared library directly",
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[EILSEQ] "Invalid or incomplete multibyte or wide character",
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[ERESTART] "Interrupted system call should be restarted",
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[ESTRPIPE] "Streams pipe error",
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[EUSERS] "Too many users",
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[ENOTSOCK] "Socket operation on non-socket",
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[EDESTADDRREQ] "Destination address required",
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[EMSGSIZE] "Message too long",
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[EPROTOTYPE] "Protocol wrong type for socket",
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[ENOPROTOOPT] "Protocol not available",
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[EPROTONOSUPPORT] "Protocol not supported",
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[ESOCKTNOSUPPORT] "Socket type not supported",
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};
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__shared char *strerror(int errnum)
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{
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if (errnum < 0)
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errnum = -errnum;
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if ((unsigned int)errnum >= ARRAY_SIZE(error_messages))
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return NULL;
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/*
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* POSIX prohibits modifying the string returned by strerror(), so we
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* can safely cast here. If userland is stupid enough to write to it
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* anyways, they will get a segfault because the messages are stored
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* in ROM rather than RAM.
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*/
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return (char *)error_messages[errnum];
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}
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/*
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* Copyright (c) 2020 Felix Kopp <sandtler@sandtler.club>
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*
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* Redistribution and use in source and binary forms, with or without modification, are permitted
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* provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its contributors may be
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* used to endorse or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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* WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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