@weintek/libc/errno

Properties:

Name	Type	Description
EACCES	Number	Permission denied. (13)
EAGAIN	Number	Resource temporarily unavailable. Try again. (11)
EBADF	Number	Bad file descriptor. (9)
EBUSY	Number	Device or resource busy. (16)
EEXIST	Number	File exists. (17)
EFAULT	Number	Bad address. (14)
EINTR	Number	Invalid argument. (4)
EINVAL	Number	Input/output error. (22)
EIO	Number	Interrupted function call. (5)
EISDIR	Number	Is a directory. (21)
ELOOP	Number	Too many levels of symbolic links. (114)
ENAMETOOLONG	Number	File name too long. (38)
ENOENT	Number	No such file or directory. (2)
ENOMEM	Number	Cannot allocate memory. (12)
ENOSPC	Number	No space left on device. (28)
ENOSYS	Number	Function not implemented. (40)
ENOTDIR	Number	Not a directory. (20)
EPERM	Number	Operation not permitted. (1)
EPIPE	Number	Broken pipe. (32)
EROFS	Number	Read-only file system. (30)
ESPIPE	Number	Invalid seek. (29)

Examples

Get error code and handle if it's an EINVAL error

const cerrno = await import('@weintek/libc/errno');
const cstdio = await import('@weintek/libc/stdio');
const file = cstdio.fopen('USB1', '/some/example/file', 'r+');
if (cstdio.fseek(file, -1, cstdio.SEEK_SET) !== 0) {
  const errCode = cerrno.getErrno();
  if (errCode === cerrno.EINVAL) {
    // do something...
  }
}

Return the last error

const cerrno = await import('@weintek/libc/errno');
const cstdio = await import('@weintek/libc/stdio');
const cstring = await import('@weintek/libc/string');
const disk = 'USB1';
const path = 'test';

try {
    cstdio.fopen(disk, path, "r");
} catch (error) {
    console.log('errno:', cerrno.getErrno())
    // errno: 2 (== cerrno.ENOENT)
    console.log('strerror returned:', cstring.strerror(cerrno.getErrno()))
    // strerror returned: No such file or directory 
    console.log('caught:', error);
    // caught: Error: No such file or directory at <anonymous> (<JS Object>:8)
}