Luna/libs/libc/include/errno.h

#ifndef _ERRNO_H
#define _ERRNO_H

/* The last error encountered during a call to a library or system function. */
extern int errno;

#define EPERM 1   // Operation not permitted
#define ENOENT 2  // No such file or directory
#define ENOEXEC 8 // Exec format error
#define EBADF 9   // Bad file descriptor
#define ENOMEM 12 // Cannot allocate memory
#define EFAULT 14 // Bad address
#define EISDIR 21 // Is a directory
#define EINVAL 22 // Invalid argument
#define EMFILE 24 // Too many open files
#define EPIPE 32  // Broken pipe. Not implemented.
#define ENOSYS 38 // Function not implemented

#endif
Kernel, libc and userspace: Add basic errno support. Kernel: Add an errno.h header with definitions for each header, and return those, negated, from syscalls when there is an error. mmap() returns an invalid address with errno encoded, instead of returning a negated errno; this address is encoded as ffffffffffffffEE where EE is errno in hex. libc: make syscall() return -1 and set errno on error, instead of returning the raw return value of the system call. Also, add mmap() and munmap() wrappers in sys/mman.h :). userspace: make the memeater program show the value of errno when allocating memory fails. Things to improve: add perror() and strerror() to make the errno experience even better! >.< 2022-10-08 10:06:09 +00:00			`#ifndef _ERRNO_H`
			`#define _ERRNO_H`

libc: Document errno.h 2022-10-12 10:01:07 +00:00			`/* The last error encountered during a call to a library or system function. */`
Kernel, libc and userspace: Add basic errno support. Kernel: Add an errno.h header with definitions for each header, and return those, negated, from syscalls when there is an error. mmap() returns an invalid address with errno encoded, instead of returning a negated errno; this address is encoded as ffffffffffffffEE where EE is errno in hex. libc: make syscall() return -1 and set errno on error, instead of returning the raw return value of the system call. Also, add mmap() and munmap() wrappers in sys/mman.h :). userspace: make the memeater program show the value of errno when allocating memory fails. Things to improve: add perror() and strerror() to make the errno experience even better! >.< 2022-10-08 10:06:09 +00:00			`extern int errno;`

libc: Document errno.h 2022-10-12 10:01:07 +00:00			`#define EPERM 1 // Operation not permitted`
			`#define ENOENT 2 // No such file or directory`
Kernel, libc: Add ENOEXEC (Exec format error) 2022-10-12 17:15:44 +00:00			`#define ENOEXEC 8 // Exec format error`
libc: Document errno.h 2022-10-12 10:01:07 +00:00			`#define EBADF 9 // Bad file descriptor`
			`#define ENOMEM 12 // Cannot allocate memory`
Kernel, libc: Implement EFAULT 2022-10-12 17:25:35 +00:00			`#define EFAULT 14 // Bad address`
libc: Document errno.h 2022-10-12 10:01:07 +00:00			`#define EISDIR 21 // Is a directory`
			`#define EINVAL 22 // Invalid argument`
			`#define EMFILE 24 // Too many open files`
libc: Add EPIPE (not returned by anything yet) 2022-10-15 13:14:02 +00:00			`#define EPIPE 32 // Broken pipe. Not implemented.`
libc: Document errno.h 2022-10-12 10:01:07 +00:00			`#define ENOSYS 38 // Function not implemented`
Kernel, libc and userspace: Add basic errno support. Kernel: Add an errno.h header with definitions for each header, and return those, negated, from syscalls when there is an error. mmap() returns an invalid address with errno encoded, instead of returning a negated errno; this address is encoded as ffffffffffffffEE where EE is errno in hex. libc: make syscall() return -1 and set errno on error, instead of returning the raw return value of the system call. Also, add mmap() and munmap() wrappers in sys/mman.h :). userspace: make the memeater program show the value of errno when allocating memory fails. Things to improve: add perror() and strerror() to make the errno experience even better! >.< 2022-10-08 10:06:09 +00:00
			`#endif`