journald: use argv0 for syslog identifier #3372
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The libsystemd code is documented to determine the syslog identifier by using https://man7.org/linux/man-pages/man3/program_invocation_short_name.3.html (a glibc thing). This code is parsing via looking at `/proc/self/exe`. Often, these things are the same, but in my case they're not because for unfortunate reasons I need to re-exec the current binary in a tempfile. It's actually simpler and more reliable for us anyways to match what libsystemd is doing by looking at argv[0]. Signed-off-by: Colin Walters <[email protected]>
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# 0.3.2 (November 30, 2025) ### Added - Use argv0 for syslog identifier ([#3372]) [#3372]: https://github.com/tokio-rs/tracing/pull/#3372
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# 0.3.2 (November 30, 2025) ### Added - Use argv0 for syslog identifier ([#3372]) [#3372]: https://github.com/tokio-rs/tracing/pull/#3372
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# 0.3.2 (November 26, 2025) ### Added - Use argv0 for syslog identifier ([#3372]) [#3372]: https://github.com/tokio-rs/tracing/pull/#3372
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# 0.3.2 (November 26, 2025) ### Added - Use argv0 for syslog identifier ([#3372]) [#3372]: https://github.com/tokio-rs/tracing/pull/#3372
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The libsystemd code is documented to determine the syslog identifier by using
https://man7.org/linux/man-pages/man3/program_invocation_short_name.3.html (a glibc thing).
This code is parsing via looking at
/proc/self/exe.Often, these things are the same, but in my case they're not because for unfortunate reasons I need to re-exec the current binary in a tempfile.
It's actually simpler and more reliable for us anyways to match what libsystemd is doing by looking at argv[0].