feat(fs): add sys_dup3#755
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| #[cfg(target_arch = "x86_64")] | ||
| SYS_DUP3 => { |
kernel/src/filesystem/vfs/syscall.rs
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| pub fn dup3(oldfd: i32, newfd: i32, flags: u32) -> Result<usize, SystemError> { | ||
| let flags: FileMode = FileMode::from_bits(flags).ok_or(SystemError::EINVAL)?; | ||
| if flags != FileMode::O_CLOEXEC { |
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这里的实现逻辑不正确。
参考dup3的含义：
https://man7.org/linux/man-pages/man2/dup.2.html
dup3()
dup3() is the same as dup2(), except that:
• The caller can force the close-on-exec flag to be set for the
new file descriptor by specifying O_CLOEXEC in flags. See the
description of the same flag in open(2) for reasons why this
may be useful.
• If oldfd equals newfd, then dup3() fails with the error
EINVAL.
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提交代码的时候需要先make fmt进行格式化，并修复clippy报出的error哈。我刚帮你修了。 |
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* feat(fs): add sys_dup3
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实现dup3系统调用并给出测试用例。