Re^2: zcat pipe gives "gzip: stdout: Broken pipe" error

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Re^3: zcat pipe gives "gzip: stdout: Broken pipe" error by ikegami (Patriarch) on Mar 26, 2025 at 16:59 UTC
Linux's https://man7.org/linux/man-pages/man2/execve.2.html says: All process attributes are preserved during an execve(), except the following: The dispositions of any signals that are being caught are reset to the default (signal(7)). [...] So a caught signal such as `$SIG{ PIPE } = \&handler;` gets reset to `$SIG{ PIPE } = "DEFAULT";`, but not `$SIG{ PIPE } = "IGNORE";`. Most if not all reset things are out of necessity. `$SIG{ PIPE } = \&handler` can't be kept since `&handler` will stop existing.	[reply] [d/l] [select]

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Re^3: zcat pipe gives "gzip: stdout: Broken pipe" error
by ikegami (Patriarch) on Mar 26, 2025 at 16:59 UTC

Linux's https://man7.org/linux/man-pages/man2/execve.2.html says:

All process attributes are preserved during an execve(), except the following:

The dispositions of any signals that are being caught are reset to the default (signal(7)).
[...]

So a caught signal such as $SIG{ PIPE } = \&handler; gets reset to $SIG{ PIPE } = "DEFAULT";, but not $SIG{ PIPE } = "IGNORE";.

Most if not all reset things are out of necessity. $SIG{ PIPE } = \&handler can't be kept since &handler will stop existing.

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