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Linux: Add IN_MASK_CREATE and corresponding error handling in inotify_add_watch

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From https://man7.org/linux/man-pages/man7/inotify.7.html

> **IN_MASK_CREATE** (since Linux 4.18)
>
> Watch pathname only if it does not already have a watch associated with it; the error EEXIST results if pathname is already being watched.
This commit is contained in:
Ryan Liptak 2022-07-31 02:41:32 -07:00 committed by Andrew Kelley
parent 075f93fa10
commit 1a1b7a3afd
2 changed files with 3 additions and 0 deletions
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2
lib/std/os.zig
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@ -4244,6 +4244,7 @@ pub const INotifyAddWatchError = error{
SystemResources, SystemResources,
UserResourceLimitReached, UserResourceLimitReached,
NotDir, NotDir,
WatchAlreadyExists,
} || UnexpectedError; } || UnexpectedError;
/// add a watch to an initialized inotify instance /// add a watch to an initialized inotify instance
@ -4266,6 +4267,7 @@ pub fn inotify_add_watchZ(inotify_fd: i32, pathname: [*:0]const u8, mask: u32) I
.NOMEM => return error.SystemResources, .NOMEM => return error.SystemResources,
.NOSPC => return error.UserResourceLimitReached, .NOSPC => return error.UserResourceLimitReached,
.NOTDIR => return error.NotDir, .NOTDIR => return error.NotDir,
.EXIST => return error.WatchAlreadyExists,
else => |err| return unexpectedErrno(err), else => |err| return unexpectedErrno(err),
} }
} }

1
lib/std/os/linux.zig
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@ -2976,6 +2976,7 @@ pub const IN = struct {
pub const ONLYDIR = 0x01000000; pub const ONLYDIR = 0x01000000;
pub const DONT_FOLLOW = 0x02000000; pub const DONT_FOLLOW = 0x02000000;
pub const EXCL_UNLINK = 0x04000000; pub const EXCL_UNLINK = 0x04000000;
pub const MASK_CREATE = 0x10000000;
pub const MASK_ADD = 0x20000000; pub const MASK_ADD = 0x20000000;
pub const ISDIR = 0x40000000; pub const ISDIR = 0x40000000;