mixandClaude Opus 5.5
ce363f48dd
Comments only, no behaviour changed. Each place the log tailer, Health and cmd/panel rely on another program now says where that is written, for the version the image runs: Postfix 3.7.11 (log_adhoc(), msg_logger_print(), smtpd_whatsup(), cleanup_milter.c, qmgr_active.c, postlogd.c, showq.c, pipe.c), logrotate 3.21.0, supervisor 4.2.5, proc(5). Measurements stay measurements and say where and when; test fixtures say whether they were seen or composed. Where the source contradicts the code the comment does not bless it but names the register entry (A-8 expiry, A-12 the ISO stamp no Postfix writes, A-15 the last recipient, A-21/A-23 sasl_username, A-33 postlogd's old inode, A-38 a socket file is not a listener, A-65 the certificate served); those are fixed in their own commits. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
29 lines
751 B
Go
29 lines
751 B
Go
//go:build unix
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package logtail
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import (
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"fmt"
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"os"
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"syscall"
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)
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// fileID names the file itself - its inode - which a rename keeps and a new
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// file does not share (rename(2): the file is moved, other hard links to it
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// are unaffected; st_ino in stat(2)). It is part of the log's fingerprint, so
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// two log files whose first bytes happen to match are still told apart. The device number
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// is left out: it can change across a host's reboot (LVM, btrfs, network
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// file systems), and the same log would then pass for a rotated one (review
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// of stage 2b).
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func fileID(f *os.File) string {
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info, err := f.Stat()
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if err != nil {
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return ""
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}
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st, ok := info.Sys().(*syscall.Stat_t)
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if !ok {
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return ""
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}
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return fmt.Sprintf("%d", st.Ino)
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}
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