feat(crash): meow_crash 系统级崩溃捕获 (agent-187) — svcd 服务异常退出上报(AF_UNIX best-effort,不崩svcd)+dmesg增量扫segfault/oops; 落盘 TF MeowOS/logs/crash_<bootts>.log 无卡回退/tmp+迁移; CLI dump/tail; S89 预置 crash.conf(主会话补)
meow_crash 62781084; meow_svcd da6ebc66→605646c4(仅+68行上报挂点); 宿主5场景全过(上报链路/dmesg增量/无卡迁移/铁律验证/CLI)
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# meow_crash.conf — meow_crash 板载服务配置(services.d,trigger=boot)
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# 部署目标:/usr/data/meow/services.d/meow_crash.conf(Data 区,首启预置)
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#
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# 字段语义与 meow_svcd 一致:
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# exec/args/enabled/restart/backoff_ms/max_restart/trigger/cap
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# - trigger=boot:板载服务恒存在即启动(拔卡保留)。
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# - restart=on-fail:崩溃后退避重启(默认 backoff 2000ms,最多 5 次)。
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# - caps:本机平台未定,保留为空。
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exec=/usr/bin/meow_crash
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args=
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enabled=1
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restart=on-fail
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backoff_ms=2000
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max_restart=5
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trigger=boot
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cap=
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