使用 grep 過濾後如何忽略行首和行的一部分 (How to ignore beginning of line and parts of a line after filtering with grep)

問題描述

使用 grep 過濾後如何忽略行首和行的一部分 (How to ignore beginning of line and parts of a line after filtering with grep)

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 kworker/4:2‑1892  [004] ....  2186.662751: rtos_queue_send_from_isr_failed: tstamp:68702870649 queue:0x0b4b0e58
 kworker/4:2‑1892  [004] ....  2186.662752: rtos_queue_send_from_isr_failed: tstamp:68702870787 queue:0x0b4b1c18
 kworker/4:2‑1892  [004] ....  2186.662752: rtos_queue_send_failed: tstamp:68702872258 queue:0x0b4a7258
 kworker/4:2‑1892  [004] ....  2186.662754: rtcpu_vinotify_event: tstamp:68702873824 tag:CSIMUX_STREAM channel:0xff frame:1 vi_tstamp:68702873242 data:0x00000001
 kworker/4:2‑1892  [004] ....  2186.662755: rtcpu_vinotify_event: tstamp:68703270221 tag:CHANSEL_PXL_SOF channel:0x00 frame:45313 vi_tstamp:68703269252 data:0x00000001
 kworker/4:2‑1892  [004] ....  2186.662755: rtcpu_vinotify_event: tstamp:68703270387 tag:ATOMP_FS channel:0x00 frame:45313 vi_tstamp:68703269257 data:0x00000000
 kworker/4:2‑1892  [004] ....  2186.662756: rtcpu_vinotify_event: tstamp:68703270504 tag:CHANSEL_FAULT channel:0x00 frame:45313 vi_tstamp:68703269302 data:0x00000200
 kworker/4:2‑1892  [004] ....  2186.662756: rtcpu_vinotify_event: tstamp:68703270903 tag:CSIMUX_STREAM channel:0xff frame:2 vi_tstamp:68703269326 data:0x00000001code:0404

或者，如果 tstamps 很難避免，

 kworker/4:2‑1892  [004] ....  2186.662755: rtcpu_vinotify_event: tstamp:68703270387 tag:ATOMP_FS channel:0x00 frame:45313 vi_tstamp:68703269257 data:0x00000000
 kworker/4:2‑1892  [004] ....  2186.662756: rtcpu_vinotify_event: tstamp:68703270504 tag:CHANSEL_FAULT channel:0x00 frame:45313 vi_tstamp:68703269302 data:0x00000200

最後，我通過排除 rtcpu_vinotify_event 消息來包含 rtos_queue_send_from_isr_failed 和 rtos_queue_send_failed 消息。如果有辦法做到這一點，而不是排除，而是包含 rtcpu_vinotify_event 字符串，那會好得多，或者如果您發現使用 find 更容易，我沒有任何偏好。

參考解法

方法 1:

Add

| cut ‑f3‑ ‑d:

to your command

For the inclusion‑exclusion problem, why don't you just

| grep rtcpu_vinotify_event

instead of the excluding grep ‑v and its patterns? The result would be

grep rtcpu_vinotify_event /sys/kernel/debug/tracing/trace | grep ‑v "CSIMUX_STREAM\|CHANSEL_PXL_SOF" | cut ‑f3‑ ‑d:

EDITED: (to remove also ts)

grep rtcpu_vinotify_event /sys/kernel/debug/tracing/trace | grep ‑v "CSIMUX_STREAM\|CHANSEL_PXL_SOF" | cut ‑f3,6‑ ‑d:

方法 2:

You could do two grep's, one for rtcpu_vinotify_event and then remove the matches for CSIMUX_STREAM and CHANSEL_PXL_SOF. The result is piped to sed to filter out the beginning of the line and tstamp / vi_tstamp.

grep 'rtcpu_vinotify_event' /sys/kernel/debug/tracing/trace | 
  grep ‑v 'CSIMUX_STREAM\|CHANSEL_PXL_SOF' | 
  sed 's/.*\(rtcpu_vinotify_event: \)tstamp:[0‑9]* \(.*\)vi_tstamp:[0‑9]* \(.*\)/\1\2\3/'

(by EUS、franzisk、Freddy)

參考文件

1. How to ignore beginning of line and parts of a line after filtering with grep (CC BY‑SA 2.5/3.0/4.0)