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 ESRCH 3    // No such process
#define EINTR 4    // Interrupted system call. Not implemented.
#define ENOEXEC 8  // Exec format error
#define EBADF 9    // Bad file descriptor
#define ENOMEM 12  // Cannot allocate memory
#define EFAULT 14  // Bad address
#define EEXIST 17  // File exists
#define ENOTDIR 20 // Not a directory
#define EISDIR 21  // Is a directory
#define EINVAL 22  // Invalid argument
#define EMFILE 24  // Too many open files
#define ENOTTY 25  // Inappropriate ioctl for device
#define ENOSPC 28  // No space left on device
#define EPIPE 32   // Broken pipe. Not implemented.
#define ENOSYS 38  // Function not implemented
#define ENOTSUP 95 // Operation not supported

#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;`

Kernel: Make mkdir() accessible to userspace 2022-10-16 15:22:12 +00:00			`#define EPERM 1 // Operation not permitted`
			`#define ENOENT 2 // No such file or directory`
Kernel, libc: Implement waitpid() FIXME: exec() is now doing weird page table stuff. But at least it works, no panics :) 2022-10-18 19:30:52 +00:00			`#define ESRCH 3 // No such process`
libc: Add a few errors to errno.h As well as ino_t, which I forgot in the fstat() commit :) 2022-10-21 16:34:01 +00:00			`#define EINTR 4 // Interrupted system call. Not implemented.`
Kernel: Make mkdir() accessible to userspace 2022-10-16 15:22:12 +00:00			`#define ENOEXEC 8 // Exec format error`
			`#define EBADF 9 // Bad file descriptor`
			`#define ENOMEM 12 // Cannot allocate memory`
			`#define EFAULT 14 // Bad address`
			`#define EEXIST 17 // File exists`
libc: Add support for EEXIST, ENOTDIR, ENOSPC, ENOTSUP and EPIPE to strerror() 2022-10-16 15:24:58 +00:00			`#define ENOTDIR 20 // Not a directory`
Kernel: Make mkdir() accessible to userspace 2022-10-16 15:22:12 +00:00			`#define EISDIR 21 // Is a directory`
			`#define EINVAL 22 // Invalid argument`
			`#define EMFILE 24 // Too many open files`
libc: Add a few errors to errno.h As well as ino_t, which I forgot in the fstat() commit :) 2022-10-21 16:34:01 +00:00			`#define ENOTTY 25 // Inappropriate ioctl for device`
Kernel: Make mkdir() accessible to userspace 2022-10-16 15:22:12 +00:00			`#define ENOSPC 28 // No space left on device`
			`#define EPIPE 32 // Broken pipe. Not implemented.`
			`#define ENOSYS 38 // Function not implemented`
Kernel, libc: Implement waitpid() FIXME: exec() is now doing weird page table stuff. But at least it works, no panics :) 2022-10-18 19:30:52 +00:00			`#define ENOTSUP 95 // Operation not supported`
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`